-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-#include "gluos.h"
-#include <assert.h>
-#include <GL/glu.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <limits.h> /* UINT_MAX */
-#include <math.h>
-
-typedef union {
- unsigned char ub[4];
- unsigned short us[2];
- unsigned int ui;
- char b[4];
- short s[2];
- int i;
- float f;
-} Type_Widget;
-
-/* Pixel storage modes */
-typedef struct {
- GLint pack_alignment;
- GLint pack_row_length;
- GLint pack_skip_rows;
- GLint pack_skip_pixels;
- GLint pack_lsb_first;
- GLint pack_swap_bytes;
- GLint pack_skip_images;
- GLint pack_image_height;
-
- GLint unpack_alignment;
- GLint unpack_row_length;
- GLint unpack_skip_rows;
- GLint unpack_skip_pixels;
- GLint unpack_lsb_first;
- GLint unpack_swap_bytes;
- GLint unpack_skip_images;
- GLint unpack_image_height;
-} PixelStorageModes;
-
-static int gluBuild1DMipmapLevelsCore(GLenum, GLint,
- GLsizei,
- GLsizei,
- GLenum, GLenum, GLint, GLint, GLint,
- const void *);
-static int gluBuild2DMipmapLevelsCore(GLenum, GLint,
- GLsizei, GLsizei,
- GLsizei, GLsizei,
- GLenum, GLenum, GLint, GLint, GLint,
- const void *);
-static int gluBuild3DMipmapLevelsCore(GLenum, GLint,
- GLsizei, GLsizei, GLsizei,
- GLsizei, GLsizei, GLsizei,
- GLenum, GLenum, GLint, GLint, GLint,
- const void *);
-
-/*
- * internal function declarations
- */
-static GLfloat bytes_per_element(GLenum type);
-static GLint elements_per_group(GLenum format, GLenum type);
-static GLint is_index(GLenum format);
-static GLint image_size(GLint width, GLint height, GLenum format, GLenum type);
-static void fill_image(const PixelStorageModes *,
- GLint width, GLint height, GLenum format,
- GLenum type, GLboolean index_format,
- const void *userdata, GLushort *newimage);
-static void empty_image(const PixelStorageModes *,
- GLint width, GLint height, GLenum format,
- GLenum type, GLboolean index_format,
- const GLushort *oldimage, void *userdata);
-static void scale_internal(GLint components, GLint widthin, GLint heightin,
- const GLushort *datain,
- GLint widthout, GLint heightout,
- GLushort *dataout);
-
-static void scale_internal_ubyte(GLint components, GLint widthin,
- GLint heightin, const GLubyte *datain,
- GLint widthout, GLint heightout,
- GLubyte *dataout, GLint element_size,
- GLint ysize, GLint group_size);
-static void scale_internal_byte(GLint components, GLint widthin,
- GLint heightin, const GLbyte *datain,
- GLint widthout, GLint heightout,
- GLbyte *dataout, GLint element_size,
- GLint ysize, GLint group_size);
-static void scale_internal_ushort(GLint components, GLint widthin,
- GLint heightin, const GLushort *datain,
- GLint widthout, GLint heightout,
- GLushort *dataout, GLint element_size,
- GLint ysize, GLint group_size,
- GLint myswap_bytes);
-static void scale_internal_short(GLint components, GLint widthin,
- GLint heightin, const GLshort *datain,
- GLint widthout, GLint heightout,
- GLshort *dataout, GLint element_size,
- GLint ysize, GLint group_size,
- GLint myswap_bytes);
-static void scale_internal_uint(GLint components, GLint widthin,
- GLint heightin, const GLuint *datain,
- GLint widthout, GLint heightout,
- GLuint *dataout, GLint element_size,
- GLint ysize, GLint group_size,
- GLint myswap_bytes);
-static void scale_internal_int(GLint components, GLint widthin,
- GLint heightin, const GLint *datain,
- GLint widthout, GLint heightout,
- GLint *dataout, GLint element_size,
- GLint ysize, GLint group_size,
- GLint myswap_bytes);
-static void scale_internal_float(GLint components, GLint widthin,
- GLint heightin, const GLfloat *datain,
- GLint widthout, GLint heightout,
- GLfloat *dataout, GLint element_size,
- GLint ysize, GLint group_size,
- GLint myswap_bytes);
-
-static int checkMipmapArgs(GLenum, GLenum, GLenum);
-static GLboolean legalFormat(GLenum);
-static GLboolean legalType(GLenum);
-static GLboolean isTypePackedPixel(GLenum);
-static GLboolean isLegalFormatForPackedPixelType(GLenum, GLenum);
-static GLboolean isLegalLevels(GLint, GLint, GLint, GLint);
-static void closestFit(GLenum, GLint, GLint, GLint, GLenum, GLenum,
- GLint *, GLint *);
-
-/* all extract/shove routines must return double to handle unsigned ints */
-static GLdouble extractUbyte(int, const void *);
-static void shoveUbyte(GLdouble, int, void *);
-static GLdouble extractSbyte(int, const void *);
-static void shoveSbyte(GLdouble, int, void *);
-static GLdouble extractUshort(int, const void *);
-static void shoveUshort(GLdouble, int, void *);
-static GLdouble extractSshort(int, const void *);
-static void shoveSshort(GLdouble, int, void *);
-static GLdouble extractUint(int, const void *);
-static void shoveUint(GLdouble, int, void *);
-static GLdouble extractSint(int, const void *);
-static void shoveSint(GLdouble, int, void *);
-static GLdouble extractFloat(int, const void *);
-static void shoveFloat(GLdouble, int, void *);
-static void halveImageSlice(int, GLdouble (*)(int, const void *),
- void (*)(GLdouble, int, void *),
- GLint, GLint, GLint,
- const void *, void *,
- GLint, GLint, GLint, GLint, GLint);
-static void halveImage3D(int, GLdouble (*)(int, const void *),
- void (*)(GLdouble, int, void *),
- GLint, GLint, GLint,
- const void *, void *,
- GLint, GLint, GLint, GLint, GLint);
-
-/* packedpixel type scale routines */
-static void extract332(int,const void *, GLfloat []);
-static void shove332(const GLfloat [],int ,void *);
-static void extract233rev(int,const void *, GLfloat []);
-static void shove233rev(const GLfloat [],int ,void *);
-static void extract565(int,const void *, GLfloat []);
-static void shove565(const GLfloat [],int ,void *);
-static void extract565rev(int,const void *, GLfloat []);
-static void shove565rev(const GLfloat [],int ,void *);
-static void extract4444(int,const void *, GLfloat []);
-static void shove4444(const GLfloat [],int ,void *);
-static void extract4444rev(int,const void *, GLfloat []);
-static void shove4444rev(const GLfloat [],int ,void *);
-static void extract5551(int,const void *, GLfloat []);
-static void shove5551(const GLfloat [],int ,void *);
-static void extract1555rev(int,const void *, GLfloat []);
-static void shove1555rev(const GLfloat [],int ,void *);
-static void extract8888(int,const void *, GLfloat []);
-static void shove8888(const GLfloat [],int ,void *);
-static void extract8888rev(int,const void *, GLfloat []);
-static void shove8888rev(const GLfloat [],int ,void *);
-static void extract1010102(int,const void *, GLfloat []);
-static void shove1010102(const GLfloat [],int ,void *);
-static void extract2101010rev(int,const void *, GLfloat []);
-static void shove2101010rev(const GLfloat [],int ,void *);
-static void scaleInternalPackedPixel(int,
- void (*)(int, const void *,GLfloat []),
- void (*)(const GLfloat [],int, void *),
- GLint,GLint, const void *,
- GLint,GLint,void *,GLint,GLint,GLint);
-static void halveImagePackedPixel(int,
- void (*)(int, const void *,GLfloat []),
- void (*)(const GLfloat [],int, void *),
- GLint, GLint, const void *,
- void *, GLint, GLint, GLint);
-static void halve1DimagePackedPixel(int,
- void (*)(int, const void *,GLfloat []),
- void (*)(const GLfloat [],int, void *),
- GLint, GLint, const void *,
- void *, GLint, GLint, GLint);
-
-static void halve1Dimage_ubyte(GLint, GLuint, GLuint,const GLubyte *,
- GLubyte *, GLint, GLint, GLint);
-static void halve1Dimage_byte(GLint, GLuint, GLuint,const GLbyte *, GLbyte *,
- GLint, GLint, GLint);
-static void halve1Dimage_ushort(GLint, GLuint, GLuint, const GLushort *,
- GLushort *, GLint, GLint, GLint, GLint);
-static void halve1Dimage_short(GLint, GLuint, GLuint,const GLshort *, GLshort *,
- GLint, GLint, GLint, GLint);
-static void halve1Dimage_uint(GLint, GLuint, GLuint, const GLuint *, GLuint *,
- GLint, GLint, GLint, GLint);
-static void halve1Dimage_int(GLint, GLuint, GLuint, const GLint *, GLint *,
- GLint, GLint, GLint, GLint);
-static void halve1Dimage_float(GLint, GLuint, GLuint, const GLfloat *, GLfloat *,
- GLint, GLint, GLint, GLint);
-
-static GLint imageSize3D(GLint, GLint, GLint, GLenum,GLenum);
-static void fillImage3D(const PixelStorageModes *, GLint, GLint, GLint,GLenum,
- GLenum, GLboolean, const void *, GLushort *);
-static void emptyImage3D(const PixelStorageModes *,
- GLint, GLint, GLint, GLenum,
- GLenum, GLboolean,
- const GLushort *, void *);
-static void scaleInternal3D(GLint, GLint, GLint, GLint, const GLushort *,
- GLint, GLint, GLint, GLushort *);
-
-static void retrieveStoreModes(PixelStorageModes *psm)
-{
- glGetIntegerv(GL_UNPACK_ALIGNMENT, &psm->unpack_alignment);
- glGetIntegerv(GL_UNPACK_ROW_LENGTH, &psm->unpack_row_length);
- glGetIntegerv(GL_UNPACK_SKIP_ROWS, &psm->unpack_skip_rows);
- glGetIntegerv(GL_UNPACK_SKIP_PIXELS, &psm->unpack_skip_pixels);
- glGetIntegerv(GL_UNPACK_LSB_FIRST, &psm->unpack_lsb_first);
- glGetIntegerv(GL_UNPACK_SWAP_BYTES, &psm->unpack_swap_bytes);
-
- glGetIntegerv(GL_PACK_ALIGNMENT, &psm->pack_alignment);
- glGetIntegerv(GL_PACK_ROW_LENGTH, &psm->pack_row_length);
- glGetIntegerv(GL_PACK_SKIP_ROWS, &psm->pack_skip_rows);
- glGetIntegerv(GL_PACK_SKIP_PIXELS, &psm->pack_skip_pixels);
- glGetIntegerv(GL_PACK_LSB_FIRST, &psm->pack_lsb_first);
- glGetIntegerv(GL_PACK_SWAP_BYTES, &psm->pack_swap_bytes);
-}
-
-static void retrieveStoreModes3D(PixelStorageModes *psm)
-{
- glGetIntegerv(GL_UNPACK_ALIGNMENT, &psm->unpack_alignment);
- glGetIntegerv(GL_UNPACK_ROW_LENGTH, &psm->unpack_row_length);
- glGetIntegerv(GL_UNPACK_SKIP_ROWS, &psm->unpack_skip_rows);
- glGetIntegerv(GL_UNPACK_SKIP_PIXELS, &psm->unpack_skip_pixels);
- glGetIntegerv(GL_UNPACK_LSB_FIRST, &psm->unpack_lsb_first);
- glGetIntegerv(GL_UNPACK_SWAP_BYTES, &psm->unpack_swap_bytes);
- glGetIntegerv(GL_UNPACK_SKIP_IMAGES, &psm->unpack_skip_images);
- glGetIntegerv(GL_UNPACK_IMAGE_HEIGHT, &psm->unpack_image_height);
-
- glGetIntegerv(GL_PACK_ALIGNMENT, &psm->pack_alignment);
- glGetIntegerv(GL_PACK_ROW_LENGTH, &psm->pack_row_length);
- glGetIntegerv(GL_PACK_SKIP_ROWS, &psm->pack_skip_rows);
- glGetIntegerv(GL_PACK_SKIP_PIXELS, &psm->pack_skip_pixels);
- glGetIntegerv(GL_PACK_LSB_FIRST, &psm->pack_lsb_first);
- glGetIntegerv(GL_PACK_SWAP_BYTES, &psm->pack_swap_bytes);
- glGetIntegerv(GL_PACK_SKIP_IMAGES, &psm->pack_skip_images);
- glGetIntegerv(GL_PACK_IMAGE_HEIGHT, &psm->pack_image_height);
-}
-
-static int computeLog(GLuint value)
-{
- int i;
-
- i = 0;
-
- /* Error! */
- if (value == 0) return -1;
-
- for (;;) {
- if (value & 1) {
- /* Error ! */
- if (value != 1) return -1;
- return i;
- }
- value = value >> 1;
- i++;
- }
-}
-
-/*
-** Compute the nearest power of 2 number. This algorithm is a little
-** strange, but it works quite well.
-*/
-static int nearestPower(GLuint value)
-{
- int i;
-
- i = 1;
-
- /* Error! */
- if (value == 0) return -1;
-
- for (;;) {
- if (value == 1) {
- return i;
- } else if (value == 3) {
- return i*4;
- }
- value = value >> 1;
- i *= 2;
- }
-}
-
-#define __GLU_SWAP_2_BYTES(s)\
-(GLushort)(((GLushort)((const GLubyte*)(s))[1])<<8 | ((const GLubyte*)(s))[0])
-
-#define __GLU_SWAP_4_BYTES(s)\
-(GLuint)(((GLuint)((const GLubyte*)(s))[3])<<24 | \
- ((GLuint)((const GLubyte*)(s))[2])<<16 | \
- ((GLuint)((const GLubyte*)(s))[1])<<8 | ((const GLubyte*)(s))[0])
-
-static void halveImage(GLint components, GLuint width, GLuint height,
- const GLushort *datain, GLushort *dataout)
-{
- int i, j, k;
- int newwidth, newheight;
- int delta;
- GLushort *s;
- const GLushort *t;
-
- newwidth = width / 2;
- newheight = height / 2;
- delta = width * components;
- s = dataout;
- t = datain;
-
- /* Piece o' cake! */
- for (i = 0; i < newheight; i++) {
- for (j = 0; j < newwidth; j++) {
- for (k = 0; k < components; k++) {
- s[0] = (t[0] + t[components] + t[delta] +
- t[delta+components] + 2) / 4;
- s++; t++;
- }
- t += components;
- }
- t += delta;
- }
-}
-
-static void halveImage_ubyte(GLint components, GLuint width, GLuint height,
- const GLubyte *datain, GLubyte *dataout,
- GLint element_size, GLint ysize, GLint group_size)
-{
- int i, j, k;
- int newwidth, newheight;
- int padBytes;
- GLubyte *s;
- const char *t;
-
- /* handle case where there is only 1 column/row */
- if (width == 1 || height == 1) {
- assert( !(width == 1 && height == 1) ); /* can't be 1x1 */
- halve1Dimage_ubyte(components,width,height,datain,dataout,
- element_size,ysize,group_size);
- return;
- }
-
- newwidth = width / 2;
- newheight = height / 2;
- padBytes = ysize - (width*group_size);
- s = dataout;
- t = (const char *)datain;
-
- /* Piece o' cake! */
- for (i = 0; i < newheight; i++) {
- for (j = 0; j < newwidth; j++) {
- for (k = 0; k < components; k++) {
- s[0] = (*(const GLubyte*)t +
- *(const GLubyte*)(t+group_size) +
- *(const GLubyte*)(t+ysize) +
- *(const GLubyte*)(t+ysize+group_size) + 2) / 4;
- s++; t += element_size;
- }
- t += group_size;
- }
- t += padBytes;
- t += ysize;
- }
-}
-
-/* */
-static void halve1Dimage_ubyte(GLint components, GLuint width, GLuint height,
- const GLubyte *dataIn, GLubyte *dataOut,
- GLint element_size, GLint ysize,
- GLint group_size)
-{
- GLint halfWidth= width / 2;
- GLint halfHeight= height / 2;
- const char *src= (const char *) dataIn;
- GLubyte *dest= dataOut;
- int jj;
-
- assert(width == 1 || height == 1); /* must be 1D */
- assert(width != height); /* can't be square */
-
- if (height == 1) { /* 1 row */
- assert(width != 1); /* widthxheight can't be 1x1 */
- halfHeight= 1;
-
- for (jj= 0; jj< halfWidth; jj++) {
- int kk;
- for (kk= 0; kk< components; kk++) {
- *dest= (*(const GLubyte*)src +
- *(const GLubyte*)(src+group_size)) / 2;
-
- src+= element_size;
- dest++;
- }
- src+= group_size; /* skip to next 2 */
- }
- {
- int padBytes= ysize - (width*group_size);
- src+= padBytes; /* for assertion only */
- }
- }
- else if (width == 1) { /* 1 column */
- int padBytes= ysize - (width * group_size);
- assert(height != 1); /* widthxheight can't be 1x1 */
- halfWidth= 1;
- /* one vertical column with possible pad bytes per row */
- /* average two at a time */
-
- for (jj= 0; jj< halfHeight; jj++) {
- int kk;
- for (kk= 0; kk< components; kk++) {
- *dest= (*(const GLubyte*)src + *(const GLubyte*)(src+ysize)) / 2;
-
- src+= element_size;
- dest++;
- }
- src+= padBytes; /* add pad bytes, if any, to get to end to row */
- src+= ysize;
- }
- }
-
- assert(src == &((const char *)dataIn)[ysize*height]);
- assert((char *)dest == &((char *)dataOut)
- [components * element_size * halfWidth * halfHeight]);
-} /* halve1Dimage_ubyte() */
-
-static void halveImage_byte(GLint components, GLuint width, GLuint height,
- const GLbyte *datain, GLbyte *dataout,
- GLint element_size,
- GLint ysize, GLint group_size)
-{
- int i, j, k;
- int newwidth, newheight;
- int padBytes;
- GLbyte *s;
- const char *t;
-
- /* handle case where there is only 1 column/row */
- if (width == 1 || height == 1) {
- assert( !(width == 1 && height == 1) ); /* can't be 1x1 */
- halve1Dimage_byte(components,width,height,datain,dataout,
- element_size,ysize,group_size);
- return;
- }
-
- newwidth = width / 2;
- newheight = height / 2;
- padBytes = ysize - (width*group_size);
- s = dataout;
- t = (const char *)datain;
-
- /* Piece o' cake! */
- for (i = 0; i < newheight; i++) {
- for (j = 0; j < newwidth; j++) {
- for (k = 0; k < components; k++) {
- s[0] = (*(const GLbyte*)t +
- *(const GLbyte*)(t+group_size) +
- *(const GLbyte*)(t+ysize) +
- *(const GLbyte*)(t+ysize+group_size) + 2) / 4;
- s++; t += element_size;
- }
- t += group_size;
- }
- t += padBytes;
- t += ysize;
- }
-}
-
-static void halve1Dimage_byte(GLint components, GLuint width, GLuint height,
- const GLbyte *dataIn, GLbyte *dataOut,
- GLint element_size,GLint ysize, GLint group_size)
-{
- GLint halfWidth= width / 2;
- GLint halfHeight= height / 2;
- const char *src= (const char *) dataIn;
- GLbyte *dest= dataOut;
- int jj;
-
- assert(width == 1 || height == 1); /* must be 1D */
- assert(width != height); /* can't be square */
-
- if (height == 1) { /* 1 row */
- assert(width != 1); /* widthxheight can't be 1x1 */
- halfHeight= 1;
-
- for (jj= 0; jj< halfWidth; jj++) {
- int kk;
- for (kk= 0; kk< components; kk++) {
- *dest= (*(const GLbyte*)src + *(const GLbyte*)(src+group_size)) / 2;
-
- src+= element_size;
- dest++;
- }
- src+= group_size; /* skip to next 2 */
- }
- {
- int padBytes= ysize - (width*group_size);
- src+= padBytes; /* for assertion only */
- }
- }
- else if (width == 1) { /* 1 column */
- int padBytes= ysize - (width * group_size);
- assert(height != 1); /* widthxheight can't be 1x1 */
- halfWidth= 1;
- /* one vertical column with possible pad bytes per row */
- /* average two at a time */
-
- for (jj= 0; jj< halfHeight; jj++) {
- int kk;
- for (kk= 0; kk< components; kk++) {
- *dest= (*(const GLbyte*)src + *(const GLbyte*)(src+ysize)) / 2;
-
- src+= element_size;
- dest++;
- }
- src+= padBytes; /* add pad bytes, if any, to get to end to row */
- src+= ysize;
- }
-
- assert(src == &((const char *)dataIn)[ysize*height]);
- }
-
- assert((char *)dest == &((char *)dataOut)
- [components * element_size * halfWidth * halfHeight]);
-} /* halve1Dimage_byte() */
-
-static void halveImage_ushort(GLint components, GLuint width, GLuint height,
- const GLushort *datain, GLushort *dataout,
- GLint element_size, GLint ysize, GLint group_size,
- GLint myswap_bytes)
-{
- int i, j, k;
- int newwidth, newheight;
- int padBytes;
- GLushort *s;
- const char *t;
-
- /* handle case where there is only 1 column/row */
- if (width == 1 || height == 1) {
- assert( !(width == 1 && height == 1) ); /* can't be 1x1 */
- halve1Dimage_ushort(components,width,height,datain,dataout,
- element_size,ysize,group_size, myswap_bytes);
- return;
- }
-
- newwidth = width / 2;
- newheight = height / 2;
- padBytes = ysize - (width*group_size);
- s = dataout;
- t = (const char *)datain;
-
- /* Piece o' cake! */
- if (!myswap_bytes)
- for (i = 0; i < newheight; i++) {
- for (j = 0; j < newwidth; j++) {
- for (k = 0; k < components; k++) {
- s[0] = (*(const GLushort*)t +
- *(const GLushort*)(t+group_size) +
- *(const GLushort*)(t+ysize) +
- *(const GLushort*)(t+ysize+group_size) + 2) / 4;
- s++; t += element_size;
- }
- t += group_size;
- }
- t += padBytes;
- t += ysize;
- }
- else
- for (i = 0; i < newheight; i++) {
- for (j = 0; j < newwidth; j++) {
- for (k = 0; k < components; k++) {
- s[0] = (__GLU_SWAP_2_BYTES(t) +
- __GLU_SWAP_2_BYTES(t+group_size) +
- __GLU_SWAP_2_BYTES(t+ysize) +
- __GLU_SWAP_2_BYTES(t+ysize+group_size)+ 2)/4;
- s++; t += element_size;
- }
- t += group_size;
- }
- t += padBytes;
- t += ysize;
- }
-}
-
-static void halve1Dimage_ushort(GLint components, GLuint width, GLuint height,
- const GLushort *dataIn, GLushort *dataOut,
- GLint element_size, GLint ysize,
- GLint group_size, GLint myswap_bytes)
-{
- GLint halfWidth= width / 2;
- GLint halfHeight= height / 2;
- const char *src= (const char *) dataIn;
- GLushort *dest= dataOut;
- int jj;
-
- assert(width == 1 || height == 1); /* must be 1D */
- assert(width != height); /* can't be square */
-
- if (height == 1) { /* 1 row */
- assert(width != 1); /* widthxheight can't be 1x1 */
- halfHeight= 1;
-
- for (jj= 0; jj< halfWidth; jj++) {
- int kk;
- for (kk= 0; kk< components; kk++) {
-#define BOX2 2
- GLushort ushort[BOX2];
- if (myswap_bytes) {
- ushort[0]= __GLU_SWAP_2_BYTES(src);
- ushort[1]= __GLU_SWAP_2_BYTES(src+group_size);
- }
- else {
- ushort[0]= *(const GLushort*)src;
- ushort[1]= *(const GLushort*)(src+group_size);
- }
-
- *dest= (ushort[0] + ushort[1]) / 2;
- src+= element_size;
- dest++;
- }
- src+= group_size; /* skip to next 2 */
- }
- {
- int padBytes= ysize - (width*group_size);
- src+= padBytes; /* for assertion only */
- }
- }
- else if (width == 1) { /* 1 column */
- int padBytes= ysize - (width * group_size);
- assert(height != 1); /* widthxheight can't be 1x1 */
- halfWidth= 1;
- /* one vertical column with possible pad bytes per row */
- /* average two at a time */
-
- for (jj= 0; jj< halfHeight; jj++) {
- int kk;
- for (kk= 0; kk< components; kk++) {
-#define BOX2 2
- GLushort ushort[BOX2];
- if (myswap_bytes) {
- ushort[0]= __GLU_SWAP_2_BYTES(src);
- ushort[1]= __GLU_SWAP_2_BYTES(src+ysize);
- }
- else {
- ushort[0]= *(const GLushort*)src;
- ushort[1]= *(const GLushort*)(src+ysize);
- }
- *dest= (ushort[0] + ushort[1]) / 2;
-
- src+= element_size;
- dest++;
- }
- src+= padBytes; /* add pad bytes, if any, to get to end to row */
- src+= ysize;
- }
-
- assert(src == &((const char *)dataIn)[ysize*height]);
- }
-
- assert((char *)dest == &((char *)dataOut)
- [components * element_size * halfWidth * halfHeight]);
-
-} /* halve1Dimage_ushort() */
-
-
-static void halveImage_short(GLint components, GLuint width, GLuint height,
- const GLshort *datain, GLshort *dataout,
- GLint element_size, GLint ysize, GLint group_size,
- GLint myswap_bytes)
-{
- int i, j, k;
- int newwidth, newheight;
- int padBytes;
- GLshort *s;
- const char *t;
-
- /* handle case where there is only 1 column/row */
- if (width == 1 || height == 1) {
- assert( !(width == 1 && height == 1) ); /* can't be 1x1 */
- halve1Dimage_short(components,width,height,datain,dataout,
- element_size,ysize,group_size, myswap_bytes);
- return;
- }
-
- newwidth = width / 2;
- newheight = height / 2;
- padBytes = ysize - (width*group_size);
- s = dataout;
- t = (const char *)datain;
-
- /* Piece o' cake! */
- if (!myswap_bytes)
- for (i = 0; i < newheight; i++) {
- for (j = 0; j < newwidth; j++) {
- for (k = 0; k < components; k++) {
- s[0] = (*(const GLshort*)t +
- *(const GLshort*)(t+group_size) +
- *(const GLshort*)(t+ysize) +
- *(const GLshort*)(t+ysize+group_size) + 2) / 4;
- s++; t += element_size;
- }
- t += group_size;
- }
- t += padBytes;
- t += ysize;
- }
- else
- for (i = 0; i < newheight; i++) {
- for (j = 0; j < newwidth; j++) {
- for (k = 0; k < components; k++) {
- GLushort b;
- GLint buf;
- b = __GLU_SWAP_2_BYTES(t);
- buf = *(const GLshort*)&b;
- b = __GLU_SWAP_2_BYTES(t+group_size);
- buf += *(const GLshort*)&b;
- b = __GLU_SWAP_2_BYTES(t+ysize);
- buf += *(const GLshort*)&b;
- b = __GLU_SWAP_2_BYTES(t+ysize+group_size);
- buf += *(const GLshort*)&b;
- s[0] = (GLshort)((buf+2)/4);
- s++; t += element_size;
- }
- t += group_size;
- }
- t += padBytes;
- t += ysize;
- }
-}
-
-static void halve1Dimage_short(GLint components, GLuint width, GLuint height,
- const GLshort *dataIn, GLshort *dataOut,
- GLint element_size, GLint ysize,
- GLint group_size, GLint myswap_bytes)
-{
- GLint halfWidth= width / 2;
- GLint halfHeight= height / 2;
- const char *src= (const char *) dataIn;
- GLshort *dest= dataOut;
- int jj;
-
- assert(width == 1 || height == 1); /* must be 1D */
- assert(width != height); /* can't be square */
-
- if (height == 1) { /* 1 row */
- assert(width != 1); /* widthxheight can't be 1x1 */
- halfHeight= 1;
-
- for (jj= 0; jj< halfWidth; jj++) {
- int kk;
- for (kk= 0; kk< components; kk++) {
-#define BOX2 2
- GLshort sshort[BOX2];
- if (myswap_bytes) {
- sshort[0]= __GLU_SWAP_2_BYTES(src);
- sshort[1]= __GLU_SWAP_2_BYTES(src+group_size);
- }
- else {
- sshort[0]= *(const GLshort*)src;
- sshort[1]= *(const GLshort*)(src+group_size);
- }
-
- *dest= (sshort[0] + sshort[1]) / 2;
- src+= element_size;
- dest++;
- }
- src+= group_size; /* skip to next 2 */
- }
- {
- int padBytes= ysize - (width*group_size);
- src+= padBytes; /* for assertion only */
- }
- }
- else if (width == 1) { /* 1 column */
- int padBytes= ysize - (width * group_size);
- assert(height != 1); /* widthxheight can't be 1x1 */
- halfWidth= 1;
- /* one vertical column with possible pad bytes per row */
- /* average two at a time */
-
- for (jj= 0; jj< halfHeight; jj++) {
- int kk;
- for (kk= 0; kk< components; kk++) {
-#define BOX2 2
- GLshort sshort[BOX2];
- if (myswap_bytes) {
- sshort[0]= __GLU_SWAP_2_BYTES(src);
- sshort[1]= __GLU_SWAP_2_BYTES(src+ysize);
- }
- else {
- sshort[0]= *(const GLshort*)src;
- sshort[1]= *(const GLshort*)(src+ysize);
- }
- *dest= (sshort[0] + sshort[1]) / 2;
-
- src+= element_size;
- dest++;
- }
- src+= padBytes; /* add pad bytes, if any, to get to end to row */
- src+= ysize;
- }
-
- assert(src == &((const char *)dataIn)[ysize*height]);
- }
-
- assert((char *)dest == &((char *)dataOut)
- [components * element_size * halfWidth * halfHeight]);
-
-} /* halve1Dimage_short() */
-
-
-static void halveImage_uint(GLint components, GLuint width, GLuint height,
- const GLuint *datain, GLuint *dataout,
- GLint element_size, GLint ysize, GLint group_size,
- GLint myswap_bytes)
-{
- int i, j, k;
- int newwidth, newheight;
- int padBytes;
- GLuint *s;
- const char *t;
-
- /* handle case where there is only 1 column/row */
- if (width == 1 || height == 1) {
- assert( !(width == 1 && height == 1) ); /* can't be 1x1 */
- halve1Dimage_uint(components,width,height,datain,dataout,
- element_size,ysize,group_size, myswap_bytes);
- return;
- }
-
- newwidth = width / 2;
- newheight = height / 2;
- padBytes = ysize - (width*group_size);
- s = dataout;
- t = (const char *)datain;
-
- /* Piece o' cake! */
- if (!myswap_bytes)
- for (i = 0; i < newheight; i++) {
- for (j = 0; j < newwidth; j++) {
- for (k = 0; k < components; k++) {
- /* need to cast to double to hold large unsigned ints */
- s[0] = ((double)*(const GLuint*)t +
- (double)*(const GLuint*)(t+group_size) +
- (double)*(const GLuint*)(t+ysize) +
- (double)*(const GLuint*)(t+ysize+group_size))/4 + 0.5;
- s++; t += element_size;
-
- }
- t += group_size;
- }
- t += padBytes;
- t += ysize;
- }
- else
- for (i = 0; i < newheight; i++) {
- for (j = 0; j < newwidth; j++) {
- for (k = 0; k < components; k++) {
- /* need to cast to double to hold large unsigned ints */
- GLdouble buf;
- buf = (GLdouble)__GLU_SWAP_4_BYTES(t) +
- (GLdouble)__GLU_SWAP_4_BYTES(t+group_size) +
- (GLdouble)__GLU_SWAP_4_BYTES(t+ysize) +
- (GLdouble)__GLU_SWAP_4_BYTES(t+ysize+group_size);
- s[0] = (GLuint)(buf/4 + 0.5);
-
- s++; t += element_size;
- }
- t += group_size;
- }
- t += padBytes;
- t += ysize;
- }
-}
-
-/* */
-static void halve1Dimage_uint(GLint components, GLuint width, GLuint height,
- const GLuint *dataIn, GLuint *dataOut,
- GLint element_size, GLint ysize,
- GLint group_size, GLint myswap_bytes)
-{
- GLint halfWidth= width / 2;
- GLint halfHeight= height / 2;
- const char *src= (const char *) dataIn;
- GLuint *dest= dataOut;
- int jj;
-
- assert(width == 1 || height == 1); /* must be 1D */
- assert(width != height); /* can't be square */
-
- if (height == 1) { /* 1 row */
- assert(width != 1); /* widthxheight can't be 1x1 */
- halfHeight= 1;
-
- for (jj= 0; jj< halfWidth; jj++) {
- int kk;
- for (kk= 0; kk< components; kk++) {
-#define BOX2 2
- GLuint uint[BOX2];
- if (myswap_bytes) {
- uint[0]= __GLU_SWAP_4_BYTES(src);
- uint[1]= __GLU_SWAP_4_BYTES(src+group_size);
- }
- else {
- uint[0]= *(const GLuint*)src;
- uint[1]= *(const GLuint*)(src+group_size);
- }
- *dest= ((double)uint[0]+(double)uint[1])/2.0;
-
- src+= element_size;
- dest++;
- }
- src+= group_size; /* skip to next 2 */
- }
- {
- int padBytes= ysize - (width*group_size);
- src+= padBytes; /* for assertion only */
- }
- }
- else if (width == 1) { /* 1 column */
- int padBytes= ysize - (width * group_size);
- assert(height != 1); /* widthxheight can't be 1x1 */
- halfWidth= 1;
- /* one vertical column with possible pad bytes per row */
- /* average two at a time */
-
- for (jj= 0; jj< halfHeight; jj++) {
- int kk;
- for (kk= 0; kk< components; kk++) {
-#define BOX2 2
- GLuint uint[BOX2];
- if (myswap_bytes) {
- uint[0]= __GLU_SWAP_4_BYTES(src);
- uint[1]= __GLU_SWAP_4_BYTES(src+ysize);
- }
- else {
- uint[0]= *(const GLuint*)src;
- uint[1]= *(const GLuint*)(src+ysize);
- }
- *dest= ((double)uint[0]+(double)uint[1])/2.0;
-
- src+= element_size;
- dest++;
- }
- src+= padBytes; /* add pad bytes, if any, to get to end to row */
- src+= ysize;
- }
-
- assert(src == &((const char *)dataIn)[ysize*height]);
- }
-
- assert((char *)dest == &((char *)dataOut)
- [components * element_size * halfWidth * halfHeight]);
-
-} /* halve1Dimage_uint() */
-
-static void halveImage_int(GLint components, GLuint width, GLuint height,
- const GLint *datain, GLint *dataout, GLint element_size,
- GLint ysize, GLint group_size, GLint myswap_bytes)
-{
- int i, j, k;
- int newwidth, newheight;
- int padBytes;
- GLint *s;
- const char *t;
-
- /* handle case where there is only 1 column/row */
- if (width == 1 || height == 1) {
- assert( !(width == 1 && height == 1) ); /* can't be 1x1 */
- halve1Dimage_int(components,width,height,datain,dataout,
- element_size,ysize,group_size, myswap_bytes);
- return;
- }
-
- newwidth = width / 2;
- newheight = height / 2;
- padBytes = ysize - (width*group_size);
- s = dataout;
- t = (const char *)datain;
-
- /* Piece o' cake! */
- if (!myswap_bytes)
- for (i = 0; i < newheight; i++) {
- for (j = 0; j < newwidth; j++) {
- for (k = 0; k < components; k++) {
- s[0] = ((float)*(const GLint*)t +
- (float)*(const GLint*)(t+group_size) +
- (float)*(const GLint*)(t+ysize) +
- (float)*(const GLint*)(t+ysize+group_size))/4 + 0.5;
- s++; t += element_size;
- }
- t += group_size;
- }
- t += padBytes;
- t += ysize;
- }
- else
- for (i = 0; i < newheight; i++) {
- for (j = 0; j < newwidth; j++) {
- for (k = 0; k < components; k++) {
- GLuint b;
- GLfloat buf;
- b = __GLU_SWAP_4_BYTES(t);
- buf = *(GLint*)&b;
- b = __GLU_SWAP_4_BYTES(t+group_size);
- buf += *(GLint*)&b;
- b = __GLU_SWAP_4_BYTES(t+ysize);
- buf += *(GLint*)&b;
- b = __GLU_SWAP_4_BYTES(t+ysize+group_size);
- buf += *(GLint*)&b;
- s[0] = (GLint)(buf/4 + 0.5);
-
- s++; t += element_size;
- }
- t += group_size;
- }
- t += padBytes;
- t += ysize;
- }
-}
-
-/* */
-static void halve1Dimage_int(GLint components, GLuint width, GLuint height,
- const GLint *dataIn, GLint *dataOut,
- GLint element_size, GLint ysize,
- GLint group_size, GLint myswap_bytes)
-{
- GLint halfWidth= width / 2;
- GLint halfHeight= height / 2;
- const char *src= (const char *) dataIn;
- GLint *dest= dataOut;
- int jj;
-
- assert(width == 1 || height == 1); /* must be 1D */
- assert(width != height); /* can't be square */
-
- if (height == 1) { /* 1 row */
- assert(width != 1); /* widthxheight can't be 1x1 */
- halfHeight= 1;
-
- for (jj= 0; jj< halfWidth; jj++) {
- int kk;
- for (kk= 0; kk< components; kk++) {
-#define BOX2 2
- GLuint uint[BOX2];
- if (myswap_bytes) {
- uint[0]= __GLU_SWAP_4_BYTES(src);
- uint[1]= __GLU_SWAP_4_BYTES(src+group_size);
- }
- else {
- uint[0]= *(const GLuint*)src;
- uint[1]= *(const GLuint*)(src+group_size);
- }
- *dest= ((float)uint[0]+(float)uint[1])/2.0;
-
- src+= element_size;
- dest++;
- }
- src+= group_size; /* skip to next 2 */
- }
- {
- int padBytes= ysize - (width*group_size);
- src+= padBytes; /* for assertion only */
- }
- }
- else if (width == 1) { /* 1 column */
- int padBytes= ysize - (width * group_size);
- assert(height != 1); /* widthxheight can't be 1x1 */
- halfWidth= 1;
- /* one vertical column with possible pad bytes per row */
- /* average two at a time */
-
- for (jj= 0; jj< halfHeight; jj++) {
- int kk;
- for (kk= 0; kk< components; kk++) {
-#define BOX2 2
- GLuint uint[BOX2];
- if (myswap_bytes) {
- uint[0]= __GLU_SWAP_4_BYTES(src);
- uint[1]= __GLU_SWAP_4_BYTES(src+ysize);
- }
- else {
- uint[0]= *(const GLuint*)src;
- uint[1]= *(const GLuint*)(src+ysize);
- }
- *dest= ((float)uint[0]+(float)uint[1])/2.0;
-
- src+= element_size;
- dest++;
- }
- src+= padBytes; /* add pad bytes, if any, to get to end to row */
- src+= ysize;
- }
-
- assert(src == &((const char *)dataIn)[ysize*height]);
- }
-
- assert((char *)dest == &((char *)dataOut)
- [components * element_size * halfWidth * halfHeight]);
-
-} /* halve1Dimage_int() */
-
-
-static void halveImage_float(GLint components, GLuint width, GLuint height,
- const GLfloat *datain, GLfloat *dataout,
- GLint element_size, GLint ysize, GLint group_size,
- GLint myswap_bytes)
-{
- int i, j, k;
- int newwidth, newheight;
- int padBytes;
- GLfloat *s;
- const char *t;
-
- /* handle case where there is only 1 column/row */
- if (width == 1 || height == 1) {
- assert( !(width == 1 && height == 1) ); /* can't be 1x1 */
- halve1Dimage_float(components,width,height,datain,dataout,
- element_size,ysize,group_size, myswap_bytes);
- return;
- }
-
- newwidth = width / 2;
- newheight = height / 2;
- padBytes = ysize - (width*group_size);
- s = dataout;
- t = (const char *)datain;
-
- /* Piece o' cake! */
- if (!myswap_bytes)
- for (i = 0; i < newheight; i++) {
- for (j = 0; j < newwidth; j++) {
- for (k = 0; k < components; k++) {
- s[0] = (*(const GLfloat*)t +
- *(const GLfloat*)(t+group_size) +
- *(const GLfloat*)(t+ysize) +
- *(const GLfloat*)(t+ysize+group_size)) / 4;
- s++; t += element_size;
- }
- t += group_size;
- }
- t += padBytes;
- t += ysize;
- }
- else
- for (i = 0; i < newheight; i++) {
- for (j = 0; j < newwidth; j++) {
- for (k = 0; k < components; k++) {
- union { GLuint b; GLfloat f; } swapbuf;
- swapbuf.b = __GLU_SWAP_4_BYTES(t);
- s[0] = swapbuf.f;
- swapbuf.b = __GLU_SWAP_4_BYTES(t+group_size);
- s[0] += swapbuf.f;
- swapbuf.b = __GLU_SWAP_4_BYTES(t+ysize);
- s[0] += swapbuf.f;
- swapbuf.b = __GLU_SWAP_4_BYTES(t+ysize+group_size);
- s[0] += swapbuf.f;
- s[0] /= 4;
- s++; t += element_size;
- }
- t += group_size;
- }
- t += padBytes;
- t += ysize;
- }
-}
-
-/* */
-static void halve1Dimage_float(GLint components, GLuint width, GLuint height,
- const GLfloat *dataIn, GLfloat *dataOut,
- GLint element_size, GLint ysize,
- GLint group_size, GLint myswap_bytes)
-{
- GLint halfWidth= width / 2;
- GLint halfHeight= height / 2;
- const char *src= (const char *) dataIn;
- GLfloat *dest= dataOut;
- int jj;
-
- assert(width == 1 || height == 1); /* must be 1D */
- assert(width != height); /* can't be square */
-
- if (height == 1) { /* 1 row */
- assert(width != 1); /* widthxheight can't be 1x1 */
- halfHeight= 1;
-
- for (jj= 0; jj< halfWidth; jj++) {
- int kk;
- for (kk= 0; kk< components; kk++) {
-#define BOX2 2
- GLfloat sfloat[BOX2];
- if (myswap_bytes) {
- sfloat[0]= __GLU_SWAP_4_BYTES(src);
- sfloat[1]= __GLU_SWAP_4_BYTES(src+group_size);
- }
- else {
- sfloat[0]= *(const GLfloat*)src;
- sfloat[1]= *(const GLfloat*)(src+group_size);
- }
-
- *dest= (sfloat[0] + sfloat[1]) / 2.0;
- src+= element_size;
- dest++;
- }
- src+= group_size; /* skip to next 2 */
- }
- {
- int padBytes= ysize - (width*group_size);
- src+= padBytes; /* for assertion only */
- }
- }
- else if (width == 1) { /* 1 column */
- int padBytes= ysize - (width * group_size);
- assert(height != 1); /* widthxheight can't be 1x1 */
- halfWidth= 1;
- /* one vertical column with possible pad bytes per row */
- /* average two at a time */
-
- for (jj= 0; jj< halfHeight; jj++) {
- int kk;
- for (kk= 0; kk< components; kk++) {
-#define BOX2 2
- GLfloat sfloat[BOX2];
- if (myswap_bytes) {
- sfloat[0]= __GLU_SWAP_4_BYTES(src);
- sfloat[1]= __GLU_SWAP_4_BYTES(src+ysize);
- }
- else {
- sfloat[0]= *(const GLfloat*)src;
- sfloat[1]= *(const GLfloat*)(src+ysize);
- }
- *dest= (sfloat[0] + sfloat[1]) / 2.0;
-
- src+= element_size;
- dest++;
- }
- src+= padBytes; /* add pad bytes, if any, to get to end to row */
- src+= ysize; /* skip to odd row */
- }
- }
-
- assert(src == &((const char *)dataIn)[ysize*height]);
- assert((char *)dest == &((char *)dataOut)
- [components * element_size * halfWidth * halfHeight]);
-} /* halve1Dimage_float() */
-
-static void scale_internal(GLint components, GLint widthin, GLint heightin,
- const GLushort *datain,
- GLint widthout, GLint heightout,
- GLushort *dataout)
-{
- float x, lowx, highx, convx, halfconvx;
- float y, lowy, highy, convy, halfconvy;
- float xpercent,ypercent;
- float percent;
- /* Max components in a format is 4, so... */
- float totals[4];
- float area;
- int i,j,k,yint,xint,xindex,yindex;
- int temp;
-
- if (widthin == widthout*2 && heightin == heightout*2) {
- halveImage(components, widthin, heightin, datain, dataout);
- return;
- }
- convy = (float) heightin/heightout;
- convx = (float) widthin/widthout;
- halfconvx = convx/2;
- halfconvy = convy/2;
- for (i = 0; i < heightout; i++) {
- y = convy * (i+0.5);
- if (heightin > heightout) {
- highy = y + halfconvy;
- lowy = y - halfconvy;
- } else {
- highy = y + 0.5;
- lowy = y - 0.5;
- }
- for (j = 0; j < widthout; j++) {
- x = convx * (j+0.5);
- if (widthin > widthout) {
- highx = x + halfconvx;
- lowx = x - halfconvx;
- } else {
- highx = x + 0.5;
- lowx = x - 0.5;
- }
-
- /*
- ** Ok, now apply box filter to box that goes from (lowx, lowy)
- ** to (highx, highy) on input data into this pixel on output
- ** data.
- */
- totals[0] = totals[1] = totals[2] = totals[3] = 0.0;
- area = 0.0;
-
- y = lowy;
- yint = floor(y);
- while (y < highy) {
- yindex = (yint + heightin) % heightin;
- if (highy < yint+1) {
- ypercent = highy - y;
- } else {
- ypercent = yint+1 - y;
- }
-
- x = lowx;
- xint = floor(x);
-
- while (x < highx) {
- xindex = (xint + widthin) % widthin;
- if (highx < xint+1) {
- xpercent = highx - x;
- } else {
- xpercent = xint+1 - x;
- }
-
- percent = xpercent * ypercent;
- area += percent;
- temp = (xindex + (yindex * widthin)) * components;
- for (k = 0; k < components; k++) {
- totals[k] += datain[temp + k] * percent;
- }
-
- xint++;
- x = xint;
- }
- yint++;
- y = yint;
- }
-
- temp = (j + (i * widthout)) * components;
- for (k = 0; k < components; k++) {
- /* totals[] should be rounded in the case of enlarging an RGB
- * ramp when the type is 332 or 4444
- */
- dataout[temp + k] = (totals[k]+0.5)/area;
- }
- }
- }
-}
-
-static void scale_internal_ubyte(GLint components, GLint widthin,
- GLint heightin, const GLubyte *datain,
- GLint widthout, GLint heightout,
- GLubyte *dataout, GLint element_size,
- GLint ysize, GLint group_size)
-{
- float convx;
- float convy;
- float percent;
- /* Max components in a format is 4, so... */
- float totals[4];
- float area;
- int i,j,k,xindex;
-
- const char *temp, *temp0;
- const char *temp_index;
- int outindex;
-
- int lowx_int, highx_int, lowy_int, highy_int;
- float x_percent, y_percent;
- float lowx_float, highx_float, lowy_float, highy_float;
- float convy_float, convx_float;
- int convy_int, convx_int;
- int l, m;
- const char *left, *right;
-
- if (widthin == widthout*2 && heightin == heightout*2) {
- halveImage_ubyte(components, widthin, heightin,
- (const GLubyte *)datain, (GLubyte *)dataout,
- element_size, ysize, group_size);
- return;
- }
- convy = (float) heightin/heightout;
- convx = (float) widthin/widthout;
- convy_int = floor(convy);
- convy_float = convy - convy_int;
- convx_int = floor(convx);
- convx_float = convx - convx_int;
-
- area = convx * convy;
-
- lowy_int = 0;
- lowy_float = 0;
- highy_int = convy_int;
- highy_float = convy_float;
-
- for (i = 0; i < heightout; i++) {
- /* Clamp here to be sure we don't read beyond input buffer. */
- if (highy_int >= heightin)
- highy_int = heightin - 1;
- lowx_int = 0;
- lowx_float = 0;
- highx_int = convx_int;
- highx_float = convx_float;
-
- for (j = 0; j < widthout; j++) {
-
- /*
- ** Ok, now apply box filter to box that goes from (lowx, lowy)
- ** to (highx, highy) on input data into this pixel on output
- ** data.
- */
- totals[0] = totals[1] = totals[2] = totals[3] = 0.0;
-
- /* calculate the value for pixels in the 1st row */
- xindex = lowx_int*group_size;
- if((highy_int>lowy_int) && (highx_int>lowx_int)) {
-
- y_percent = 1-lowy_float;
- temp = (const char *)datain + xindex + lowy_int * ysize;
- percent = y_percent * (1-lowx_float);
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- totals[k] += (GLubyte)(*(temp_index)) * percent;
- }
- left = temp;
- for(l = lowx_int+1; l < highx_int; l++) {
- temp += group_size;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- totals[k] += (GLubyte)(*(temp_index)) * y_percent;
- }
- }
- temp += group_size;
- right = temp;
- percent = y_percent * highx_float;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- totals[k] += (GLubyte)(*(temp_index)) * percent;
- }
-
- /* calculate the value for pixels in the last row */
- y_percent = highy_float;
- percent = y_percent * (1-lowx_float);
- temp = (const char *)datain + xindex + highy_int * ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- totals[k] += (GLubyte)(*(temp_index)) * percent;
- }
- for(l = lowx_int+1; l < highx_int; l++) {
- temp += group_size;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- totals[k] += (GLubyte)(*(temp_index)) * y_percent;
- }
- }
- temp += group_size;
- percent = y_percent * highx_float;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- totals[k] += (GLubyte)(*(temp_index)) * percent;
- }
-
-
- /* calculate the value for pixels in the 1st and last column */
- for(m = lowy_int+1; m < highy_int; m++) {
- left += ysize;
- right += ysize;
- for (k = 0; k < components;
- k++, left += element_size, right += element_size) {
- totals[k] += (GLubyte)(*(left))*(1-lowx_float)
- +(GLubyte)(*(right))*highx_float;
- }
- }
- } else if (highy_int > lowy_int) {
- x_percent = highx_float - lowx_float;
- percent = (1-lowy_float)*x_percent;
- temp = (const char *)datain + xindex + lowy_int*ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- totals[k] += (GLubyte)(*(temp_index)) * percent;
- }
- for(m = lowy_int+1; m < highy_int; m++) {
- temp += ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- totals[k] += (GLubyte)(*(temp_index)) * x_percent;
- }
- }
- percent = x_percent * highy_float;
- temp += ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- totals[k] += (GLubyte)(*(temp_index)) * percent;
- }
- } else if (highx_int > lowx_int) {
- y_percent = highy_float - lowy_float;
- percent = (1-lowx_float)*y_percent;
- temp = (const char *)datain + xindex + lowy_int*ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- totals[k] += (GLubyte)(*(temp_index)) * percent;
- }
- for (l = lowx_int+1; l < highx_int; l++) {
- temp += group_size;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- totals[k] += (GLubyte)(*(temp_index)) * y_percent;
- }
- }
- temp += group_size;
- percent = y_percent * highx_float;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- totals[k] += (GLubyte)(*(temp_index)) * percent;
- }
- } else {
- percent = (highy_float-lowy_float)*(highx_float-lowx_float);
- temp = (const char *)datain + xindex + lowy_int * ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- totals[k] += (GLubyte)(*(temp_index)) * percent;
- }
- }
-
-
-
- /* this is for the pixels in the body */
- temp0 = (const char *)datain + xindex + group_size +
- (lowy_int+1)*ysize;
- for (m = lowy_int+1; m < highy_int; m++) {
- temp = temp0;
- for(l = lowx_int+1; l < highx_int; l++) {
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- totals[k] += (GLubyte)(*(temp_index));
- }
- temp += group_size;
- }
- temp0 += ysize;
- }
-
- outindex = (j + (i * widthout)) * components;
- for (k = 0; k < components; k++) {
- dataout[outindex + k] = totals[k]/area;
- /*printf("totals[%d] = %f\n", k, totals[k]);*/
- }
- lowx_int = highx_int;
- lowx_float = highx_float;
- highx_int += convx_int;
- highx_float += convx_float;
- if(highx_float > 1) {
- highx_float -= 1.0;
- highx_int++;
- }
- }
- lowy_int = highy_int;
- lowy_float = highy_float;
- highy_int += convy_int;
- highy_float += convy_float;
- if(highy_float > 1) {
- highy_float -= 1.0;
- highy_int++;
- }
- }
-}
-
-static void scale_internal_byte(GLint components, GLint widthin,
- GLint heightin, const GLbyte *datain,
- GLint widthout, GLint heightout,
- GLbyte *dataout, GLint element_size,
- GLint ysize, GLint group_size)
-{
- float convx;
- float convy;
- float percent;
- /* Max components in a format is 4, so... */
- float totals[4];
- float area;
- int i,j,k,xindex;
-
- const char *temp, *temp0;
- const char *temp_index;
- int outindex;
-
- int lowx_int, highx_int, lowy_int, highy_int;
- float x_percent, y_percent;
- float lowx_float, highx_float, lowy_float, highy_float;
- float convy_float, convx_float;
- int convy_int, convx_int;
- int l, m;
- const char *left, *right;
-
- if (widthin == widthout*2 && heightin == heightout*2) {
- halveImage_byte(components, widthin, heightin,
- (const GLbyte *)datain, (GLbyte *)dataout,
- element_size, ysize, group_size);
- return;
- }
- convy = (float) heightin/heightout;
- convx = (float) widthin/widthout;
- convy_int = floor(convy);
- convy_float = convy - convy_int;
- convx_int = floor(convx);
- convx_float = convx - convx_int;
-
- area = convx * convy;
-
- lowy_int = 0;
- lowy_float = 0;
- highy_int = convy_int;
- highy_float = convy_float;
-
- for (i = 0; i < heightout; i++) {
- /* Clamp here to be sure we don't read beyond input buffer. */
- if (highy_int >= heightin)
- highy_int = heightin - 1;
- lowx_int = 0;
- lowx_float = 0;
- highx_int = convx_int;
- highx_float = convx_float;
-
- for (j = 0; j < widthout; j++) {
-
- /*
- ** Ok, now apply box filter to box that goes from (lowx, lowy)
- ** to (highx, highy) on input data into this pixel on output
- ** data.
- */
- totals[0] = totals[1] = totals[2] = totals[3] = 0.0;
-
- /* calculate the value for pixels in the 1st row */
- xindex = lowx_int*group_size;
- if((highy_int>lowy_int) && (highx_int>lowx_int)) {
-
- y_percent = 1-lowy_float;
- temp = (const char *)datain + xindex + lowy_int * ysize;
- percent = y_percent * (1-lowx_float);
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- totals[k] += (GLbyte)(*(temp_index)) * percent;
- }
- left = temp;
- for(l = lowx_int+1; l < highx_int; l++) {
- temp += group_size;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- totals[k] += (GLbyte)(*(temp_index)) * y_percent;
- }
- }
- temp += group_size;
- right = temp;
- percent = y_percent * highx_float;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- totals[k] += (GLbyte)(*(temp_index)) * percent;
- }
-
- /* calculate the value for pixels in the last row */
- y_percent = highy_float;
- percent = y_percent * (1-lowx_float);
- temp = (const char *)datain + xindex + highy_int * ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- totals[k] += (GLbyte)(*(temp_index)) * percent;
- }
- for(l = lowx_int+1; l < highx_int; l++) {
- temp += group_size;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- totals[k] += (GLbyte)(*(temp_index)) * y_percent;
- }
- }
- temp += group_size;
- percent = y_percent * highx_float;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- totals[k] += (GLbyte)(*(temp_index)) * percent;
- }
-
-
- /* calculate the value for pixels in the 1st and last column */
- for(m = lowy_int+1; m < highy_int; m++) {
- left += ysize;
- right += ysize;
- for (k = 0; k < components;
- k++, left += element_size, right += element_size) {
- totals[k] += (GLbyte)(*(left))*(1-lowx_float)
- +(GLbyte)(*(right))*highx_float;
- }
- }
- } else if (highy_int > lowy_int) {
- x_percent = highx_float - lowx_float;
- percent = (1-lowy_float)*x_percent;
- temp = (const char *)datain + xindex + lowy_int*ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- totals[k] += (GLbyte)(*(temp_index)) * percent;
- }
- for(m = lowy_int+1; m < highy_int; m++) {
- temp += ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- totals[k] += (GLbyte)(*(temp_index)) * x_percent;
- }
- }
- percent = x_percent * highy_float;
- temp += ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- totals[k] += (GLbyte)(*(temp_index)) * percent;
- }
- } else if (highx_int > lowx_int) {
- y_percent = highy_float - lowy_float;
- percent = (1-lowx_float)*y_percent;
- temp = (const char *)datain + xindex + lowy_int*ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- totals[k] += (GLbyte)(*(temp_index)) * percent;
- }
- for (l = lowx_int+1; l < highx_int; l++) {
- temp += group_size;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- totals[k] += (GLbyte)(*(temp_index)) * y_percent;
- }
- }
- temp += group_size;
- percent = y_percent * highx_float;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- totals[k] += (GLbyte)(*(temp_index)) * percent;
- }
- } else {
- percent = (highy_float-lowy_float)*(highx_float-lowx_float);
- temp = (const char *)datain + xindex + lowy_int * ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- totals[k] += (GLbyte)(*(temp_index)) * percent;
- }
- }
-
-
-
- /* this is for the pixels in the body */
- temp0 = (const char *)datain + xindex + group_size +
- (lowy_int+1)*ysize;
- for (m = lowy_int+1; m < highy_int; m++) {
- temp = temp0;
- for(l = lowx_int+1; l < highx_int; l++) {
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- totals[k] += (GLbyte)(*(temp_index));
- }
- temp += group_size;
- }
- temp0 += ysize;
- }
-
- outindex = (j + (i * widthout)) * components;
- for (k = 0; k < components; k++) {
- dataout[outindex + k] = totals[k]/area;
- /*printf("totals[%d] = %f\n", k, totals[k]);*/
- }
- lowx_int = highx_int;
- lowx_float = highx_float;
- highx_int += convx_int;
- highx_float += convx_float;
- if(highx_float > 1) {
- highx_float -= 1.0;
- highx_int++;
- }
- }
- lowy_int = highy_int;
- lowy_float = highy_float;
- highy_int += convy_int;
- highy_float += convy_float;
- if(highy_float > 1) {
- highy_float -= 1.0;
- highy_int++;
- }
- }
-}
-
-static void scale_internal_ushort(GLint components, GLint widthin,
- GLint heightin, const GLushort *datain,
- GLint widthout, GLint heightout,
- GLushort *dataout, GLint element_size,
- GLint ysize, GLint group_size,
- GLint myswap_bytes)
-{
- float convx;
- float convy;
- float percent;
- /* Max components in a format is 4, so... */
- float totals[4];
- float area;
- int i,j,k,xindex;
-
- const char *temp, *temp0;
- const char *temp_index;
- int outindex;
-
- int lowx_int, highx_int, lowy_int, highy_int;
- float x_percent, y_percent;
- float lowx_float, highx_float, lowy_float, highy_float;
- float convy_float, convx_float;
- int convy_int, convx_int;
- int l, m;
- const char *left, *right;
-
- if (widthin == widthout*2 && heightin == heightout*2) {
- halveImage_ushort(components, widthin, heightin,
- (const GLushort *)datain, (GLushort *)dataout,
- element_size, ysize, group_size, myswap_bytes);
- return;
- }
- convy = (float) heightin/heightout;
- convx = (float) widthin/widthout;
- convy_int = floor(convy);
- convy_float = convy - convy_int;
- convx_int = floor(convx);
- convx_float = convx - convx_int;
-
- area = convx * convy;
-
- lowy_int = 0;
- lowy_float = 0;
- highy_int = convy_int;
- highy_float = convy_float;
-
- for (i = 0; i < heightout; i++) {
- /* Clamp here to be sure we don't read beyond input buffer. */
- if (highy_int >= heightin)
- highy_int = heightin - 1;
- lowx_int = 0;
- lowx_float = 0;
- highx_int = convx_int;
- highx_float = convx_float;
-
- for (j = 0; j < widthout; j++) {
- /*
- ** Ok, now apply box filter to box that goes from (lowx, lowy)
- ** to (highx, highy) on input data into this pixel on output
- ** data.
- */
- totals[0] = totals[1] = totals[2] = totals[3] = 0.0;
-
- /* calculate the value for pixels in the 1st row */
- xindex = lowx_int*group_size;
- if((highy_int>lowy_int) && (highx_int>lowx_int)) {
-
- y_percent = 1-lowy_float;
- temp = (const char *)datain + xindex + lowy_int * ysize;
- percent = y_percent * (1-lowx_float);
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
- } else {
- totals[k] += *(const GLushort*)temp_index * percent;
- }
- }
- left = temp;
- for(l = lowx_int+1; l < highx_int; l++) {
- temp += group_size;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] +=
- __GLU_SWAP_2_BYTES(temp_index) * y_percent;
- } else {
- totals[k] += *(const GLushort*)temp_index * y_percent;
- }
- }
- }
- temp += group_size;
- right = temp;
- percent = y_percent * highx_float;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
- } else {
- totals[k] += *(const GLushort*)temp_index * percent;
- }
- }
-
- /* calculate the value for pixels in the last row */
- y_percent = highy_float;
- percent = y_percent * (1-lowx_float);
- temp = (const char *)datain + xindex + highy_int * ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
- } else {
- totals[k] += *(const GLushort*)temp_index * percent;
- }
- }
- for(l = lowx_int+1; l < highx_int; l++) {
- temp += group_size;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] +=
- __GLU_SWAP_2_BYTES(temp_index) * y_percent;
- } else {
- totals[k] += *(const GLushort*)temp_index * y_percent;
- }
- }
- }
- temp += group_size;
- percent = y_percent * highx_float;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
- } else {
- totals[k] += *(const GLushort*)temp_index * percent;
- }
- }
-
- /* calculate the value for pixels in the 1st and last column */
- for(m = lowy_int+1; m < highy_int; m++) {
- left += ysize;
- right += ysize;
- for (k = 0; k < components;
- k++, left += element_size, right += element_size) {
- if (myswap_bytes) {
- totals[k] +=
- __GLU_SWAP_2_BYTES(left) * (1-lowx_float) +
- __GLU_SWAP_2_BYTES(right) * highx_float;
- } else {
- totals[k] += *(const GLushort*)left * (1-lowx_float)
- + *(const GLushort*)right * highx_float;
- }
- }
- }
- } else if (highy_int > lowy_int) {
- x_percent = highx_float - lowx_float;
- percent = (1-lowy_float)*x_percent;
- temp = (const char *)datain + xindex + lowy_int*ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
- } else {
- totals[k] += *(const GLushort*)temp_index * percent;
- }
- }
- for(m = lowy_int+1; m < highy_int; m++) {
- temp += ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] +=
- __GLU_SWAP_2_BYTES(temp_index) * x_percent;
- } else {
- totals[k] += *(const GLushort*)temp_index * x_percent;
- }
- }
- }
- percent = x_percent * highy_float;
- temp += ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
- } else {
- totals[k] += *(const GLushort*)temp_index * percent;
- }
- }
- } else if (highx_int > lowx_int) {
- y_percent = highy_float - lowy_float;
- percent = (1-lowx_float)*y_percent;
- temp = (const char *)datain + xindex + lowy_int*ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
- } else {
- totals[k] += *(const GLushort*)temp_index * percent;
- }
- }
- for (l = lowx_int+1; l < highx_int; l++) {
- temp += group_size;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] +=
- __GLU_SWAP_2_BYTES(temp_index) * y_percent;
- } else {
- totals[k] += *(const GLushort*)temp_index * y_percent;
- }
- }
- }
- temp += group_size;
- percent = y_percent * highx_float;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
- } else {
- totals[k] += *(const GLushort*)temp_index * percent;
- }
- }
- } else {
- percent = (highy_float-lowy_float)*(highx_float-lowx_float);
- temp = (const char *)datain + xindex + lowy_int * ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
- } else {
- totals[k] += *(const GLushort*)temp_index * percent;
- }
- }
- }
-
- /* this is for the pixels in the body */
- temp0 = (const char *)datain + xindex + group_size +
- (lowy_int+1)*ysize;
- for (m = lowy_int+1; m < highy_int; m++) {
- temp = temp0;
- for(l = lowx_int+1; l < highx_int; l++) {
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] += __GLU_SWAP_2_BYTES(temp_index);
- } else {
- totals[k] += *(const GLushort*)temp_index;
- }
- }
- temp += group_size;
- }
- temp0 += ysize;
- }
-
- outindex = (j + (i * widthout)) * components;
- for (k = 0; k < components; k++) {
- dataout[outindex + k] = totals[k]/area;
- /*printf("totals[%d] = %f\n", k, totals[k]);*/
- }
- lowx_int = highx_int;
- lowx_float = highx_float;
- highx_int += convx_int;
- highx_float += convx_float;
- if(highx_float > 1) {
- highx_float -= 1.0;
- highx_int++;
- }
- }
- lowy_int = highy_int;
- lowy_float = highy_float;
- highy_int += convy_int;
- highy_float += convy_float;
- if(highy_float > 1) {
- highy_float -= 1.0;
- highy_int++;
- }
- }
-}
-
-static void scale_internal_short(GLint components, GLint widthin,
- GLint heightin, const GLshort *datain,
- GLint widthout, GLint heightout,
- GLshort *dataout, GLint element_size,
- GLint ysize, GLint group_size,
- GLint myswap_bytes)
-{
- float convx;
- float convy;
- float percent;
- /* Max components in a format is 4, so... */
- float totals[4];
- float area;
- int i,j,k,xindex;
-
- const char *temp, *temp0;
- const char *temp_index;
- int outindex;
-
- int lowx_int, highx_int, lowy_int, highy_int;
- float x_percent, y_percent;
- float lowx_float, highx_float, lowy_float, highy_float;
- float convy_float, convx_float;
- int convy_int, convx_int;
- int l, m;
- const char *left, *right;
-
- GLushort swapbuf; /* unsigned buffer */
-
- if (widthin == widthout*2 && heightin == heightout*2) {
- halveImage_short(components, widthin, heightin,
- (const GLshort *)datain, (GLshort *)dataout,
- element_size, ysize, group_size, myswap_bytes);
- return;
- }
- convy = (float) heightin/heightout;
- convx = (float) widthin/widthout;
- convy_int = floor(convy);
- convy_float = convy - convy_int;
- convx_int = floor(convx);
- convx_float = convx - convx_int;
-
- area = convx * convy;
-
- lowy_int = 0;
- lowy_float = 0;
- highy_int = convy_int;
- highy_float = convy_float;
-
- for (i = 0; i < heightout; i++) {
- /* Clamp here to be sure we don't read beyond input buffer. */
- if (highy_int >= heightin)
- highy_int = heightin - 1;
- lowx_int = 0;
- lowx_float = 0;
- highx_int = convx_int;
- highx_float = convx_float;
-
- for (j = 0; j < widthout; j++) {
- /*
- ** Ok, now apply box filter to box that goes from (lowx, lowy)
- ** to (highx, highy) on input data into this pixel on output
- ** data.
- */
- totals[0] = totals[1] = totals[2] = totals[3] = 0.0;
-
- /* calculate the value for pixels in the 1st row */
- xindex = lowx_int*group_size;
- if((highy_int>lowy_int) && (highx_int>lowx_int)) {
-
- y_percent = 1-lowy_float;
- temp = (const char *)datain + xindex + lowy_int * ysize;
- percent = y_percent * (1-lowx_float);
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf = __GLU_SWAP_2_BYTES(temp_index);
- totals[k] += *(const GLshort*)&swapbuf * percent;
- } else {
- totals[k] += *(const GLshort*)temp_index * percent;
- }
- }
- left = temp;
- for(l = lowx_int+1; l < highx_int; l++) {
- temp += group_size;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf = __GLU_SWAP_2_BYTES(temp_index);
- totals[k] += *(const GLshort*)&swapbuf * y_percent;
- } else {
- totals[k] += *(const GLshort*)temp_index * y_percent;
- }
- }
- }
- temp += group_size;
- right = temp;
- percent = y_percent * highx_float;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf = __GLU_SWAP_2_BYTES(temp_index);
- totals[k] += *(const GLshort*)&swapbuf * percent;
- } else {
- totals[k] += *(const GLshort*)temp_index * percent;
- }
- }
-
- /* calculate the value for pixels in the last row */
- y_percent = highy_float;
- percent = y_percent * (1-lowx_float);
- temp = (const char *)datain + xindex + highy_int * ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf = __GLU_SWAP_2_BYTES(temp_index);
- totals[k] += *(const GLshort*)&swapbuf * percent;
- } else {
- totals[k] += *(const GLshort*)temp_index * percent;
- }
- }
- for(l = lowx_int+1; l < highx_int; l++) {
- temp += group_size;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf = __GLU_SWAP_2_BYTES(temp_index);
- totals[k] += *(const GLshort*)&swapbuf * y_percent;
- } else {
- totals[k] += *(const GLshort*)temp_index * y_percent;
- }
- }
- }
- temp += group_size;
- percent = y_percent * highx_float;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf = __GLU_SWAP_2_BYTES(temp_index);
- totals[k] += *(const GLshort*)&swapbuf * percent;
- } else {
- totals[k] += *(const GLshort*)temp_index * percent;
- }
- }
-
- /* calculate the value for pixels in the 1st and last column */
- for(m = lowy_int+1; m < highy_int; m++) {
- left += ysize;
- right += ysize;
- for (k = 0; k < components;
- k++, left += element_size, right += element_size) {
- if (myswap_bytes) {
- swapbuf = __GLU_SWAP_2_BYTES(left);
- totals[k] += *(const GLshort*)&swapbuf * (1-lowx_float);
- swapbuf = __GLU_SWAP_2_BYTES(right);
- totals[k] += *(const GLshort*)&swapbuf * highx_float;
- } else {
- totals[k] += *(const GLshort*)left * (1-lowx_float)
- + *(const GLshort*)right * highx_float;
- }
- }
- }
- } else if (highy_int > lowy_int) {
- x_percent = highx_float - lowx_float;
- percent = (1-lowy_float)*x_percent;
- temp = (const char *)datain + xindex + lowy_int*ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf = __GLU_SWAP_2_BYTES(temp_index);
- totals[k] += *(const GLshort*)&swapbuf * percent;
- } else {
- totals[k] += *(const GLshort*)temp_index * percent;
- }
- }
- for(m = lowy_int+1; m < highy_int; m++) {
- temp += ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf = __GLU_SWAP_2_BYTES(temp_index);
- totals[k] += *(const GLshort*)&swapbuf * x_percent;
- } else {
- totals[k] += *(const GLshort*)temp_index * x_percent;
- }
- }
- }
- percent = x_percent * highy_float;
- temp += ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf = __GLU_SWAP_2_BYTES(temp_index);
- totals[k] += *(const GLshort*)&swapbuf * percent;
- } else {
- totals[k] += *(const GLshort*)temp_index * percent;
- }
- }
- } else if (highx_int > lowx_int) {
- y_percent = highy_float - lowy_float;
- percent = (1-lowx_float)*y_percent;
-
- temp = (const char *)datain + xindex + lowy_int*ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf = __GLU_SWAP_2_BYTES(temp_index);
- totals[k] += *(const GLshort*)&swapbuf * percent;
- } else {
- totals[k] += *(const GLshort*)temp_index * percent;
- }
- }
- for (l = lowx_int+1; l < highx_int; l++) {
- temp += group_size;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf = __GLU_SWAP_2_BYTES(temp_index);
- totals[k] += *(const GLshort*)&swapbuf * y_percent;
- } else {
- totals[k] += *(const GLshort*)temp_index * y_percent;
- }
- }
- }
- temp += group_size;
- percent = y_percent * highx_float;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf = __GLU_SWAP_2_BYTES(temp_index);
- totals[k] += *(const GLshort*)&swapbuf * percent;
- } else {
- totals[k] += *(const GLshort*)temp_index * percent;
- }
- }
- } else {
- percent = (highy_float-lowy_float)*(highx_float-lowx_float);
- temp = (const char *)datain + xindex + lowy_int * ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf = __GLU_SWAP_2_BYTES(temp_index);
- totals[k] += *(const GLshort*)&swapbuf * percent;
- } else {
- totals[k] += *(const GLshort*)temp_index * percent;
- }
- }
- }
-
- /* this is for the pixels in the body */
- temp0 = (const char *)datain + xindex + group_size +
- (lowy_int+1)*ysize;
- for (m = lowy_int+1; m < highy_int; m++) {
- temp = temp0;
- for(l = lowx_int+1; l < highx_int; l++) {
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf = __GLU_SWAP_2_BYTES(temp_index);
- totals[k] += *(const GLshort*)&swapbuf;
- } else {
- totals[k] += *(const GLshort*)temp_index;
- }
- }
- temp += group_size;
- }
- temp0 += ysize;
- }
-
- outindex = (j + (i * widthout)) * components;
- for (k = 0; k < components; k++) {
- dataout[outindex + k] = totals[k]/area;
- /*printf("totals[%d] = %f\n", k, totals[k]);*/
- }
- lowx_int = highx_int;
- lowx_float = highx_float;
- highx_int += convx_int;
- highx_float += convx_float;
- if(highx_float > 1) {
- highx_float -= 1.0;
- highx_int++;
- }
- }
- lowy_int = highy_int;
- lowy_float = highy_float;
- highy_int += convy_int;
- highy_float += convy_float;
- if(highy_float > 1) {
- highy_float -= 1.0;
- highy_int++;
- }
- }
-}
-
-static void scale_internal_uint(GLint components, GLint widthin,
- GLint heightin, const GLuint *datain,
- GLint widthout, GLint heightout,
- GLuint *dataout, GLint element_size,
- GLint ysize, GLint group_size,
- GLint myswap_bytes)
-{
- float convx;
- float convy;
- float percent;
- /* Max components in a format is 4, so... */
- float totals[4];
- float area;
- int i,j,k,xindex;
-
- const char *temp, *temp0;
- const char *temp_index;
- int outindex;
-
- int lowx_int, highx_int, lowy_int, highy_int;
- float x_percent, y_percent;
- float lowx_float, highx_float, lowy_float, highy_float;
- float convy_float, convx_float;
- int convy_int, convx_int;
- int l, m;
- const char *left, *right;
-
- if (widthin == widthout*2 && heightin == heightout*2) {
- halveImage_uint(components, widthin, heightin,
- (const GLuint *)datain, (GLuint *)dataout,
- element_size, ysize, group_size, myswap_bytes);
- return;
- }
- convy = (float) heightin/heightout;
- convx = (float) widthin/widthout;
- convy_int = floor(convy);
- convy_float = convy - convy_int;
- convx_int = floor(convx);
- convx_float = convx - convx_int;
-
- area = convx * convy;
-
- lowy_int = 0;
- lowy_float = 0;
- highy_int = convy_int;
- highy_float = convy_float;
-
- for (i = 0; i < heightout; i++) {
- /* Clamp here to be sure we don't read beyond input buffer. */
- if (highy_int >= heightin)
- highy_int = heightin - 1;
- lowx_int = 0;
- lowx_float = 0;
- highx_int = convx_int;
- highx_float = convx_float;
-
- for (j = 0; j < widthout; j++) {
- /*
- ** Ok, now apply box filter to box that goes from (lowx, lowy)
- ** to (highx, highy) on input data into this pixel on output
- ** data.
- */
- totals[0] = totals[1] = totals[2] = totals[3] = 0.0;
-
- /* calculate the value for pixels in the 1st row */
- xindex = lowx_int*group_size;
- if((highy_int>lowy_int) && (highx_int>lowx_int)) {
-
- y_percent = 1-lowy_float;
- temp = (const char *)datain + xindex + lowy_int * ysize;
- percent = y_percent * (1-lowx_float);
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] += __GLU_SWAP_4_BYTES(temp_index) * percent;
- } else {
- totals[k] += *(const GLuint*)temp_index * percent;
- }
- }
- left = temp;
- for(l = lowx_int+1; l < highx_int; l++) {
- temp += group_size;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] +=
- __GLU_SWAP_4_BYTES(temp_index) * y_percent;
- } else {
- totals[k] += *(const GLuint*)temp_index * y_percent;
- }
- }
- }
- temp += group_size;
- right = temp;
- percent = y_percent * highx_float;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] += __GLU_SWAP_4_BYTES(temp_index) * percent;
- } else {
- totals[k] += *(const GLuint*)temp_index * percent;
- }
- }
-
- /* calculate the value for pixels in the last row */
- y_percent = highy_float;
- percent = y_percent * (1-lowx_float);
- temp = (const char *)datain + xindex + highy_int * ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] += __GLU_SWAP_4_BYTES(temp_index) * percent;
- } else {
- totals[k] += *(const GLuint*)temp_index * percent;
- }
- }
- for(l = lowx_int+1; l < highx_int; l++) {
- temp += group_size;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] +=
- __GLU_SWAP_4_BYTES(temp_index) * y_percent;
- } else {
- totals[k] += *(const GLuint*)temp_index * y_percent;
- }
- }
- }
- temp += group_size;
- percent = y_percent * highx_float;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] += __GLU_SWAP_4_BYTES(temp_index) * percent;
- } else {
- totals[k] += *(const GLuint*)temp_index * percent;
- }
- }
-
- /* calculate the value for pixels in the 1st and last column */
- for(m = lowy_int+1; m < highy_int; m++) {
- left += ysize;
- right += ysize;
- for (k = 0; k < components;
- k++, left += element_size, right += element_size) {
- if (myswap_bytes) {
- totals[k] +=
- __GLU_SWAP_4_BYTES(left) * (1-lowx_float)
- + __GLU_SWAP_4_BYTES(right) * highx_float;
- } else {
- totals[k] += *(const GLuint*)left * (1-lowx_float)
- + *(const GLuint*)right * highx_float;
- }
- }
- }
- } else if (highy_int > lowy_int) {
- x_percent = highx_float - lowx_float;
- percent = (1-lowy_float)*x_percent;
- temp = (const char *)datain + xindex + lowy_int*ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] += __GLU_SWAP_4_BYTES(temp_index) * percent;
- } else {
- totals[k] += *(const GLuint*)temp_index * percent;
- }
- }
- for(m = lowy_int+1; m < highy_int; m++) {
- temp += ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] +=
- __GLU_SWAP_4_BYTES(temp_index) * x_percent;
- } else {
- totals[k] += *(const GLuint*)temp_index * x_percent;
- }
- }
- }
- percent = x_percent * highy_float;
- temp += ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] += __GLU_SWAP_4_BYTES(temp_index) * percent;
- } else {
- totals[k] += *(const GLuint*)temp_index * percent;
- }
- }
- } else if (highx_int > lowx_int) {
- y_percent = highy_float - lowy_float;
- percent = (1-lowx_float)*y_percent;
-
- temp = (const char *)datain + xindex + lowy_int*ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] += __GLU_SWAP_4_BYTES(temp_index) * percent;
- } else {
- totals[k] += *(const GLuint*)temp_index * percent;
- }
- }
- for (l = lowx_int+1; l < highx_int; l++) {
- temp += group_size;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] +=
- __GLU_SWAP_4_BYTES(temp_index) * y_percent;
- } else {
- totals[k] += *(const GLuint*)temp_index * y_percent;
- }
- }
- }
- temp += group_size;
- percent = y_percent * highx_float;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] += __GLU_SWAP_4_BYTES(temp_index) * percent;
- } else {
- totals[k] += *(const GLuint*)temp_index * percent;
- }
- }
- } else {
- percent = (highy_float-lowy_float)*(highx_float-lowx_float);
- temp = (const char *)datain + xindex + lowy_int * ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] += __GLU_SWAP_4_BYTES(temp_index) * percent;
- } else {
- totals[k] += *(const GLuint*)temp_index * percent;
- }
- }
- }
-
- /* this is for the pixels in the body */
- temp0 = (const char *)datain + xindex + group_size +
- (lowy_int+1)*ysize;
- for (m = lowy_int+1; m < highy_int; m++) {
- temp = temp0;
- for(l = lowx_int+1; l < highx_int; l++) {
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] += __GLU_SWAP_4_BYTES(temp_index);
- } else {
- totals[k] += *(const GLuint*)temp_index;
- }
- }
- temp += group_size;
- }
- temp0 += ysize;
- }
-
- outindex = (j + (i * widthout)) * components;
- for (k = 0; k < components; k++) {
- /* clamp at UINT_MAX */
- float value= totals[k]/area;
- if (value >= (float) UINT_MAX) { /* need '=' */
- dataout[outindex + k] = UINT_MAX;
- }
- else dataout[outindex + k] = value;
- }
- lowx_int = highx_int;
- lowx_float = highx_float;
- highx_int += convx_int;
- highx_float += convx_float;
- if(highx_float > 1) {
- highx_float -= 1.0;
- highx_int++;
- }
- }
- lowy_int = highy_int;
- lowy_float = highy_float;
- highy_int += convy_int;
- highy_float += convy_float;
- if(highy_float > 1) {
- highy_float -= 1.0;
- highy_int++;
- }
- }
-}
-
-
-
-static void scale_internal_int(GLint components, GLint widthin,
- GLint heightin, const GLint *datain,
- GLint widthout, GLint heightout,
- GLint *dataout, GLint element_size,
- GLint ysize, GLint group_size,
- GLint myswap_bytes)
-{
- float convx;
- float convy;
- float percent;
- /* Max components in a format is 4, so... */
- float totals[4];
- float area;
- int i,j,k,xindex;
-
- const char *temp, *temp0;
- const char *temp_index;
- int outindex;
-
- int lowx_int, highx_int, lowy_int, highy_int;
- float x_percent, y_percent;
- float lowx_float, highx_float, lowy_float, highy_float;
- float convy_float, convx_float;
- int convy_int, convx_int;
- int l, m;
- const char *left, *right;
-
- GLuint swapbuf; /* unsigned buffer */
-
- if (widthin == widthout*2 && heightin == heightout*2) {
- halveImage_int(components, widthin, heightin,
- (const GLint *)datain, (GLint *)dataout,
- element_size, ysize, group_size, myswap_bytes);
- return;
- }
- convy = (float) heightin/heightout;
- convx = (float) widthin/widthout;
- convy_int = floor(convy);
- convy_float = convy - convy_int;
- convx_int = floor(convx);
- convx_float = convx - convx_int;
-
- area = convx * convy;
-
- lowy_int = 0;
- lowy_float = 0;
- highy_int = convy_int;
- highy_float = convy_float;
-
- for (i = 0; i < heightout; i++) {
- /* Clamp here to be sure we don't read beyond input buffer. */
- if (highy_int >= heightin)
- highy_int = heightin - 1;
- lowx_int = 0;
- lowx_float = 0;
- highx_int = convx_int;
- highx_float = convx_float;
-
- for (j = 0; j < widthout; j++) {
- /*
- ** Ok, now apply box filter to box that goes from (lowx, lowy)
- ** to (highx, highy) on input data into this pixel on output
- ** data.
- */
- totals[0] = totals[1] = totals[2] = totals[3] = 0.0;
-
- /* calculate the value for pixels in the 1st row */
- xindex = lowx_int*group_size;
- if((highy_int>lowy_int) && (highx_int>lowx_int)) {
-
- y_percent = 1-lowy_float;
- temp = (const char *)datain + xindex + lowy_int * ysize;
- percent = y_percent * (1-lowx_float);
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf = __GLU_SWAP_4_BYTES(temp_index);
- totals[k] += *(const GLint*)&swapbuf * percent;
- } else {
- totals[k] += *(const GLint*)temp_index * percent;
- }
- }
- left = temp;
- for(l = lowx_int+1; l < highx_int; l++) {
- temp += group_size;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf = __GLU_SWAP_4_BYTES(temp_index);
- totals[k] += *(const GLint*)&swapbuf * y_percent;
- } else {
- totals[k] += *(const GLint*)temp_index * y_percent;
- }
- }
- }
- temp += group_size;
- right = temp;
- percent = y_percent * highx_float;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf = __GLU_SWAP_4_BYTES(temp_index);
- totals[k] += *(const GLint*)&swapbuf * percent;
- } else {
- totals[k] += *(const GLint*)temp_index * percent;
- }
- }
-
- /* calculate the value for pixels in the last row */
- y_percent = highy_float;
- percent = y_percent * (1-lowx_float);
- temp = (const char *)datain + xindex + highy_int * ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf = __GLU_SWAP_4_BYTES(temp_index);
- totals[k] += *(const GLint*)&swapbuf * percent;
- } else {
- totals[k] += *(const GLint*)temp_index * percent;
- }
- }
- for(l = lowx_int+1; l < highx_int; l++) {
- temp += group_size;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf = __GLU_SWAP_4_BYTES(temp_index);
- totals[k] += *(const GLint*)&swapbuf * y_percent;
- } else {
- totals[k] += *(const GLint*)temp_index * y_percent;
- }
- }
- }
- temp += group_size;
- percent = y_percent * highx_float;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf = __GLU_SWAP_4_BYTES(temp_index);
- totals[k] += *(const GLint*)&swapbuf * percent;
- } else {
- totals[k] += *(const GLint*)temp_index * percent;
- }
- }
-
- /* calculate the value for pixels in the 1st and last column */
- for(m = lowy_int+1; m < highy_int; m++) {
- left += ysize;
- right += ysize;
- for (k = 0; k < components;
- k++, left += element_size, right += element_size) {
- if (myswap_bytes) {
- swapbuf = __GLU_SWAP_4_BYTES(left);
- totals[k] += *(const GLint*)&swapbuf * (1-lowx_float);
- swapbuf = __GLU_SWAP_4_BYTES(right);
- totals[k] += *(const GLint*)&swapbuf * highx_float;
- } else {
- totals[k] += *(const GLint*)left * (1-lowx_float)
- + *(const GLint*)right * highx_float;
- }
- }
- }
- } else if (highy_int > lowy_int) {
- x_percent = highx_float - lowx_float;
- percent = (1-lowy_float)*x_percent;
- temp = (const char *)datain + xindex + lowy_int*ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf = __GLU_SWAP_4_BYTES(temp_index);
- totals[k] += *(const GLint*)&swapbuf * percent;
- } else {
- totals[k] += *(const GLint*)temp_index * percent;
- }
- }
- for(m = lowy_int+1; m < highy_int; m++) {
- temp += ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf = __GLU_SWAP_4_BYTES(temp_index);
- totals[k] += *(const GLint*)&swapbuf * x_percent;
- } else {
- totals[k] += *(const GLint*)temp_index * x_percent;
- }
- }
- }
- percent = x_percent * highy_float;
- temp += ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf = __GLU_SWAP_4_BYTES(temp_index);
- totals[k] += *(const GLint*)&swapbuf * percent;
- } else {
- totals[k] += *(const GLint*)temp_index * percent;
- }
- }
- } else if (highx_int > lowx_int) {
- y_percent = highy_float - lowy_float;
- percent = (1-lowx_float)*y_percent;
-
- temp = (const char *)datain + xindex + lowy_int*ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf = __GLU_SWAP_4_BYTES(temp_index);
- totals[k] += *(const GLint*)&swapbuf * percent;
- } else {
- totals[k] += *(const GLint*)temp_index * percent;
- }
- }
- for (l = lowx_int+1; l < highx_int; l++) {
- temp += group_size;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf = __GLU_SWAP_4_BYTES(temp_index);
- totals[k] += *(const GLint*)&swapbuf * y_percent;
- } else {
- totals[k] += *(const GLint*)temp_index * y_percent;
- }
- }
- }
- temp += group_size;
- percent = y_percent * highx_float;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf = __GLU_SWAP_4_BYTES(temp_index);
- totals[k] += *(const GLint*)&swapbuf * percent;
- } else {
- totals[k] += *(const GLint*)temp_index * percent;
- }
- }
- } else {
- percent = (highy_float-lowy_float)*(highx_float-lowx_float);
- temp = (const char *)datain + xindex + lowy_int * ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf = __GLU_SWAP_4_BYTES(temp_index);
- totals[k] += *(const GLint*)&swapbuf * percent;
- } else {
- totals[k] += *(const GLint*)temp_index * percent;
- }
- }
- }
-
- /* this is for the pixels in the body */
- temp0 = (const char *)datain + xindex + group_size +
- (lowy_int+1)*ysize;
- for (m = lowy_int+1; m < highy_int; m++) {
- temp = temp0;
- for(l = lowx_int+1; l < highx_int; l++) {
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf = __GLU_SWAP_4_BYTES(temp_index);
- totals[k] += *(const GLint*)&swapbuf;
- } else {
- totals[k] += *(const GLint*)temp_index;
- }
- }
- temp += group_size;
- }
- temp0 += ysize;
- }
-
- outindex = (j + (i * widthout)) * components;
- for (k = 0; k < components; k++) {
- dataout[outindex + k] = totals[k]/area;
- /*printf("totals[%d] = %f\n", k, totals[k]);*/
- }
- lowx_int = highx_int;
- lowx_float = highx_float;
- highx_int += convx_int;
- highx_float += convx_float;
- if(highx_float > 1) {
- highx_float -= 1.0;
- highx_int++;
- }
- }
- lowy_int = highy_int;
- lowy_float = highy_float;
- highy_int += convy_int;
- highy_float += convy_float;
- if(highy_float > 1) {
- highy_float -= 1.0;
- highy_int++;
- }
- }
-}
-
-
-
-static void scale_internal_float(GLint components, GLint widthin,
- GLint heightin, const GLfloat *datain,
- GLint widthout, GLint heightout,
- GLfloat *dataout, GLint element_size,
- GLint ysize, GLint group_size,
- GLint myswap_bytes)
-{
- float convx;
- float convy;
- float percent;
- /* Max components in a format is 4, so... */
- float totals[4];
- float area;
- int i,j,k,xindex;
-
- const char *temp, *temp0;
- const char *temp_index;
- int outindex;
-
- int lowx_int, highx_int, lowy_int, highy_int;
- float x_percent, y_percent;
- float lowx_float, highx_float, lowy_float, highy_float;
- float convy_float, convx_float;
- int convy_int, convx_int;
- int l, m;
- const char *left, *right;
-
- union { GLuint b; GLfloat f; } swapbuf;
-
- if (widthin == widthout*2 && heightin == heightout*2) {
- halveImage_float(components, widthin, heightin,
- (const GLfloat *)datain, (GLfloat *)dataout,
- element_size, ysize, group_size, myswap_bytes);
- return;
- }
- convy = (float) heightin/heightout;
- convx = (float) widthin/widthout;
- convy_int = floor(convy);
- convy_float = convy - convy_int;
- convx_int = floor(convx);
- convx_float = convx - convx_int;
-
- area = convx * convy;
-
- lowy_int = 0;
- lowy_float = 0;
- highy_int = convy_int;
- highy_float = convy_float;
-
- for (i = 0; i < heightout; i++) {
- /* Clamp here to be sure we don't read beyond input buffer. */
- if (highy_int >= heightin)
- highy_int = heightin - 1;
- lowx_int = 0;
- lowx_float = 0;
- highx_int = convx_int;
- highx_float = convx_float;
-
- for (j = 0; j < widthout; j++) {
- /*
- ** Ok, now apply box filter to box that goes from (lowx, lowy)
- ** to (highx, highy) on input data into this pixel on output
- ** data.
- */
- totals[0] = totals[1] = totals[2] = totals[3] = 0.0;
-
- /* calculate the value for pixels in the 1st row */
- xindex = lowx_int*group_size;
- if((highy_int>lowy_int) && (highx_int>lowx_int)) {
-
- y_percent = 1-lowy_float;
- temp = (const char *)datain + xindex + lowy_int * ysize;
- percent = y_percent * (1-lowx_float);
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf.b = __GLU_SWAP_4_BYTES(temp_index);
- totals[k] += swapbuf.f * percent;
- } else {
- totals[k] += *(const GLfloat*)temp_index * percent;
- }
- }
- left = temp;
- for(l = lowx_int+1; l < highx_int; l++) {
- temp += group_size;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf.b = __GLU_SWAP_4_BYTES(temp_index);
- totals[k] += swapbuf.f * y_percent;
- } else {
- totals[k] += *(const GLfloat*)temp_index * y_percent;
- }
- }
- }
- temp += group_size;
- right = temp;
- percent = y_percent * highx_float;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf.b = __GLU_SWAP_4_BYTES(temp_index);
- totals[k] += swapbuf.f * percent;
- } else {
- totals[k] += *(const GLfloat*)temp_index * percent;
- }
- }
-
- /* calculate the value for pixels in the last row */
- y_percent = highy_float;
- percent = y_percent * (1-lowx_float);
- temp = (const char *)datain + xindex + highy_int * ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf.b = __GLU_SWAP_4_BYTES(temp_index);
- totals[k] += swapbuf.f * percent;
- } else {
- totals[k] += *(const GLfloat*)temp_index * percent;
- }
- }
- for(l = lowx_int+1; l < highx_int; l++) {
- temp += group_size;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf.b = __GLU_SWAP_4_BYTES(temp_index);
- totals[k] += swapbuf.f * y_percent;
- } else {
- totals[k] += *(const GLfloat*)temp_index * y_percent;
- }
- }
- }
- temp += group_size;
- percent = y_percent * highx_float;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf.b = __GLU_SWAP_4_BYTES(temp_index);
- totals[k] += swapbuf.f * percent;
- } else {
- totals[k] += *(const GLfloat*)temp_index * percent;
- }
- }
-
- /* calculate the value for pixels in the 1st and last column */
- for(m = lowy_int+1; m < highy_int; m++) {
- left += ysize;
- right += ysize;
- for (k = 0; k < components;
- k++, left += element_size, right += element_size) {
- if (myswap_bytes) {
- swapbuf.b = __GLU_SWAP_4_BYTES(left);
- totals[k] += swapbuf.f * (1-lowx_float);
- swapbuf.b = __GLU_SWAP_4_BYTES(right);
- totals[k] += swapbuf.f * highx_float;
- } else {
- totals[k] += *(const GLfloat*)left * (1-lowx_float)
- + *(const GLfloat*)right * highx_float;
- }
- }
- }
- } else if (highy_int > lowy_int) {
- x_percent = highx_float - lowx_float;
- percent = (1-lowy_float)*x_percent;
- temp = (const char *)datain + xindex + lowy_int*ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf.b = __GLU_SWAP_4_BYTES(temp_index);
- totals[k] += swapbuf.f * percent;
- } else {
- totals[k] += *(const GLfloat*)temp_index * percent;
- }
- }
- for(m = lowy_int+1; m < highy_int; m++) {
- temp += ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf.b = __GLU_SWAP_4_BYTES(temp_index);
- totals[k] += swapbuf.f * x_percent;
- } else {
- totals[k] += *(const GLfloat*)temp_index * x_percent;
- }
- }
- }
- percent = x_percent * highy_float;
- temp += ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf.b = __GLU_SWAP_4_BYTES(temp_index);
- totals[k] += swapbuf.f * percent;
- } else {
- totals[k] += *(const GLfloat*)temp_index * percent;
- }
- }
- } else if (highx_int > lowx_int) {
- y_percent = highy_float - lowy_float;
- percent = (1-lowx_float)*y_percent;
-
- temp = (const char *)datain + xindex + lowy_int*ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf.b = __GLU_SWAP_4_BYTES(temp_index);
- totals[k] += swapbuf.f * percent;
- } else {
- totals[k] += *(const GLfloat*)temp_index * percent;
- }
- }
- for (l = lowx_int+1; l < highx_int; l++) {
- temp += group_size;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf.b = __GLU_SWAP_4_BYTES(temp_index);
- totals[k] += swapbuf.f * y_percent;
- } else {
- totals[k] += *(const GLfloat*)temp_index * y_percent;
- }
- }
- }
- temp += group_size;
- percent = y_percent * highx_float;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf.b = __GLU_SWAP_4_BYTES(temp_index);
- totals[k] += swapbuf.f * percent;
- } else {
- totals[k] += *(const GLfloat*)temp_index * percent;
- }
- }
- } else {
- percent = (highy_float-lowy_float)*(highx_float-lowx_float);
- temp = (const char *)datain + xindex + lowy_int * ysize;
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf.b = __GLU_SWAP_4_BYTES(temp_index);
- totals[k] += swapbuf.f * percent;
- } else {
- totals[k] += *(const GLfloat*)temp_index * percent;
- }
- }
- }
-
- /* this is for the pixels in the body */
- temp0 = (const char *)datain + xindex + group_size +
- (lowy_int+1)*ysize;
- for (m = lowy_int+1; m < highy_int; m++) {
- temp = temp0;
- for(l = lowx_int+1; l < highx_int; l++) {
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- swapbuf.b = __GLU_SWAP_4_BYTES(temp_index);
- totals[k] += swapbuf.f;
- } else {
- totals[k] += *(const GLfloat*)temp_index;
- }
- }
- temp += group_size;
- }
- temp0 += ysize;
- }
-
- outindex = (j + (i * widthout)) * components;
- for (k = 0; k < components; k++) {
- dataout[outindex + k] = totals[k]/area;
- /*printf("totals[%d] = %f\n", k, totals[k]);*/
- }
- lowx_int = highx_int;
- lowx_float = highx_float;
- highx_int += convx_int;
- highx_float += convx_float;
- if(highx_float > 1) {
- highx_float -= 1.0;
- highx_int++;
- }
- }
- lowy_int = highy_int;
- lowy_float = highy_float;
- highy_int += convy_int;
- highy_float += convy_float;
- if(highy_float > 1) {
- highy_float -= 1.0;
- highy_int++;
- }
- }
-}
-
-static int checkMipmapArgs(GLenum internalFormat, GLenum format, GLenum type)
-{
- if (!legalFormat(format) || !legalType(type)) {
- return GLU_INVALID_ENUM;
- }
- if (format == GL_STENCIL_INDEX) {
- return GLU_INVALID_ENUM;
- }
-
- if (!isLegalFormatForPackedPixelType(format, type)) {
- return GLU_INVALID_OPERATION;
- }
-
- return 0;
-} /* checkMipmapArgs() */
-
-static GLboolean legalFormat(GLenum format)
-{
- switch(format) {
- case GL_COLOR_INDEX:
- case GL_STENCIL_INDEX:
- case GL_DEPTH_COMPONENT:
- case GL_RED:
- case GL_GREEN:
- case GL_BLUE:
- case GL_ALPHA:
- case GL_RGB:
- case GL_RGBA:
- case GL_LUMINANCE:
- case GL_LUMINANCE_ALPHA:
- case GL_BGR:
- case GL_BGRA:
- return GL_TRUE;
- default:
- return GL_FALSE;
- }
-}
-
-
-static GLboolean legalType(GLenum type)
-{
- switch(type) {
- case GL_BITMAP:
- case GL_BYTE:
- case GL_UNSIGNED_BYTE:
- case GL_SHORT:
- case GL_UNSIGNED_SHORT:
- case GL_INT:
- case GL_UNSIGNED_INT:
- case GL_FLOAT:
- case GL_UNSIGNED_BYTE_3_3_2:
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- case GL_UNSIGNED_SHORT_5_6_5:
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- case GL_UNSIGNED_SHORT_4_4_4_4:
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- case GL_UNSIGNED_SHORT_5_5_5_1:
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- case GL_UNSIGNED_INT_8_8_8_8:
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- case GL_UNSIGNED_INT_10_10_10_2:
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- return GL_TRUE;
- default:
- return GL_FALSE;
- }
-}
-
-/* */
-static GLboolean isTypePackedPixel(GLenum type)
-{
- assert(legalType(type));
-
- if (type == GL_UNSIGNED_BYTE_3_3_2 ||
- type == GL_UNSIGNED_BYTE_2_3_3_REV ||
- type == GL_UNSIGNED_SHORT_5_6_5 ||
- type == GL_UNSIGNED_SHORT_5_6_5_REV ||
- type == GL_UNSIGNED_SHORT_4_4_4_4 ||
- type == GL_UNSIGNED_SHORT_4_4_4_4_REV ||
- type == GL_UNSIGNED_SHORT_5_5_5_1 ||
- type == GL_UNSIGNED_SHORT_1_5_5_5_REV ||
- type == GL_UNSIGNED_INT_8_8_8_8 ||
- type == GL_UNSIGNED_INT_8_8_8_8_REV ||
- type == GL_UNSIGNED_INT_10_10_10_2 ||
- type == GL_UNSIGNED_INT_2_10_10_10_REV) {
- return 1;
- }
- else return 0;
-} /* isTypePackedPixel() */
-
-/* Determines if the packed pixel type is compatible with the format */
-static GLboolean isLegalFormatForPackedPixelType(GLenum format, GLenum type)
-{
- /* if not a packed pixel type then return true */
- if (!isTypePackedPixel(type)) {
- return GL_TRUE;
- }
-
- /* 3_3_2/2_3_3_REV & 5_6_5/5_6_5_REV are only compatible with RGB */
- if ((type == GL_UNSIGNED_BYTE_3_3_2 || type == GL_UNSIGNED_BYTE_2_3_3_REV||
- type == GL_UNSIGNED_SHORT_5_6_5|| type == GL_UNSIGNED_SHORT_5_6_5_REV)
- && format != GL_RGB)
- return GL_FALSE;
-
- /* 4_4_4_4/4_4_4_4_REV & 5_5_5_1/1_5_5_5_REV & 8_8_8_8/8_8_8_8_REV &
- * 10_10_10_2/2_10_10_10_REV are only compatible with RGBA, BGRA & ABGR_EXT.
- */
- if ((type == GL_UNSIGNED_SHORT_4_4_4_4 ||
- type == GL_UNSIGNED_SHORT_4_4_4_4_REV ||
- type == GL_UNSIGNED_SHORT_5_5_5_1 ||
- type == GL_UNSIGNED_SHORT_1_5_5_5_REV ||
- type == GL_UNSIGNED_INT_8_8_8_8 ||
- type == GL_UNSIGNED_INT_8_8_8_8_REV ||
- type == GL_UNSIGNED_INT_10_10_10_2 ||
- type == GL_UNSIGNED_INT_2_10_10_10_REV) &&
- (format != GL_RGBA &&
- format != GL_BGRA)) {
- return GL_FALSE;
- }
-
- return GL_TRUE;
-} /* isLegalFormatForPackedPixelType() */
-
-static GLboolean isLegalLevels(GLint userLevel,GLint baseLevel,GLint maxLevel,
- GLint totalLevels)
-{
- if (baseLevel < 0 || baseLevel < userLevel || maxLevel < baseLevel ||
- totalLevels < maxLevel)
- return GL_FALSE;
- else return GL_TRUE;
-} /* isLegalLevels() */
-
-/* Given user requested texture size, determine if it fits. If it
- * doesn't then halve both sides and make the determination again
- * until it does fit (for IR only).
- * Note that proxy textures are not implemented in RE* even though
- * they advertise the texture extension.
- * Note that proxy textures are implemented but not according to spec in
- * IMPACT*.
- */
-static void closestFit(GLenum target, GLint width, GLint height,
- GLint internalFormat, GLenum format, GLenum type,
- GLint *newWidth, GLint *newHeight)
-{
- /* Use proxy textures if OpenGL version is >= 1.1 */
- if ( (strtod((const char *)glGetString(GL_VERSION),NULL) >= 1.1)
- ) {
- GLint widthPowerOf2= nearestPower(width);
- GLint heightPowerOf2= nearestPower(height);
- GLint proxyWidth;
-
- do {
- /* compute level 1 width & height, clamping each at 1 */
- GLint widthAtLevelOne= (widthPowerOf2 > 1) ?
- widthPowerOf2 >> 1 :
- widthPowerOf2;
- GLint heightAtLevelOne= (heightPowerOf2 > 1) ?
- heightPowerOf2 >> 1 :
- heightPowerOf2;
- GLenum proxyTarget;
- assert(widthAtLevelOne > 0); assert(heightAtLevelOne > 0);
-
- /* does width x height at level 1 & all their mipmaps fit? */
- if (target == GL_TEXTURE_2D || target == GL_PROXY_TEXTURE_2D) {
- proxyTarget = GL_PROXY_TEXTURE_2D;
- glTexImage2D(proxyTarget, 1, /* must be non-zero */
- internalFormat,
- widthAtLevelOne,heightAtLevelOne,0,format,type,NULL);
- } else
-#if defined(GL_ARB_texture_cube_map)
- if ((target == GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB) ||
- (target == GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB) ||
- (target == GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB) ||
- (target == GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB) ||
- (target == GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB) ||
- (target == GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB)) {
- proxyTarget = GL_PROXY_TEXTURE_CUBE_MAP_ARB;
- glTexImage2D(proxyTarget, 1, /* must be non-zero */
- internalFormat,
- widthAtLevelOne,heightAtLevelOne,0,format,type,NULL);
- } else
-#endif /* GL_ARB_texture_cube_map */
- {
- assert(target == GL_TEXTURE_1D || target == GL_PROXY_TEXTURE_1D);
- proxyTarget = GL_PROXY_TEXTURE_1D;
- glTexImage1D(proxyTarget, 1, /* must be non-zero */
- internalFormat,widthAtLevelOne,0,format,type,NULL);
- }
- glGetTexLevelParameteriv(proxyTarget, 1,GL_TEXTURE_WIDTH,&proxyWidth);
- /* does it fit??? */
- if (proxyWidth == 0) { /* nope, so try again with these sizes */
- if (widthPowerOf2 == 1 && heightPowerOf2 == 1) {
- /* An 1x1 texture couldn't fit for some reason, so
- * break out. This should never happen. But things
- * happen. The disadvantage with this if-statement is
- * that we will never be aware of when this happens
- * since it will silently branch out.
- */
- goto noProxyTextures;
- }
- widthPowerOf2= widthAtLevelOne;
- heightPowerOf2= heightAtLevelOne;
- }
- /* else it does fit */
- } while (proxyWidth == 0);
- /* loop must terminate! */
-
- /* return the width & height at level 0 that fits */
- *newWidth= widthPowerOf2;
- *newHeight= heightPowerOf2;
-/*printf("Proxy Textures\n");*/
- } /* if gluCheckExtension() */
- else { /* no texture extension, so do this instead */
- GLint maxsize;
-
-noProxyTextures:
-
- glGetIntegerv(GL_MAX_TEXTURE_SIZE, &maxsize);
- /* clamp user's texture sizes to maximum sizes, if necessary */
- *newWidth = nearestPower(width);
- if (*newWidth > maxsize) *newWidth = maxsize;
- *newHeight = nearestPower(height);
- if (*newHeight > maxsize) *newHeight = maxsize;
-/*printf("NO proxy textures\n");*/
- }
-} /* closestFit() */
-
-GLint GLAPIENTRY
-gluScaleImage(GLenum format, GLsizei widthin, GLsizei heightin,
- GLenum typein, const void *datain,
- GLsizei widthout, GLsizei heightout, GLenum typeout,
- void *dataout)
-{
- int components;
- GLushort *beforeImage;
- GLushort *afterImage;
- PixelStorageModes psm;
-
- if (widthin == 0 || heightin == 0 || widthout == 0 || heightout == 0) {
- return 0;
- }
- if (widthin < 0 || heightin < 0 || widthout < 0 || heightout < 0) {
- return GLU_INVALID_VALUE;
- }
- if (!legalFormat(format) || !legalType(typein) || !legalType(typeout)) {
- return GLU_INVALID_ENUM;
- }
- if (!isLegalFormatForPackedPixelType(format, typein)) {
- return GLU_INVALID_OPERATION;
- }
- if (!isLegalFormatForPackedPixelType(format, typeout)) {
- return GLU_INVALID_OPERATION;
- }
- beforeImage =
- malloc(image_size(widthin, heightin, format, GL_UNSIGNED_SHORT));
- afterImage =
- malloc(image_size(widthout, heightout, format, GL_UNSIGNED_SHORT));
- if (beforeImage == NULL || afterImage == NULL) {
- free(beforeImage);
- free(afterImage);
- return GLU_OUT_OF_MEMORY;
- }
-
- retrieveStoreModes(&psm);
- fill_image(&psm,widthin, heightin, format, typein, is_index(format),
- datain, beforeImage);
- components = elements_per_group(format, 0);
- scale_internal(components, widthin, heightin, beforeImage,
- widthout, heightout, afterImage);
- empty_image(&psm,widthout, heightout, format, typeout,
- is_index(format), afterImage, dataout);
- free((GLbyte *) beforeImage);
- free((GLbyte *) afterImage);
-
- return 0;
-}
-
-int gluBuild1DMipmapLevelsCore(GLenum target, GLint internalFormat,
- GLsizei width,
- GLsizei widthPowerOf2,
- GLenum format, GLenum type,
- GLint userLevel, GLint baseLevel,GLint maxLevel,
- const void *data)
-{
- GLint newwidth;
- GLint level, levels;
- GLushort *newImage;
- GLint newImage_width;
- GLushort *otherImage;
- GLushort *imageTemp;
- GLint memreq;
- GLint cmpts;
- PixelStorageModes psm;
-
- assert(checkMipmapArgs(internalFormat,format,type) == 0);
- assert(width >= 1);
-
- otherImage = NULL;
-
- newwidth= widthPowerOf2;
- levels = computeLog(newwidth);
-
- levels+= userLevel;
-
- retrieveStoreModes(&psm);
- newImage = (GLushort *)
- malloc(image_size(width, 1, format, GL_UNSIGNED_SHORT));
- newImage_width = width;
- if (newImage == NULL) {
- return GLU_OUT_OF_MEMORY;
- }
- fill_image(&psm,width, 1, format, type, is_index(format),
- data, newImage);
- cmpts = elements_per_group(format,type);
- glPixelStorei(GL_UNPACK_ALIGNMENT, 2);
- glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
- glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
- /*
- ** If swap_bytes was set, swapping occurred in fill_image.
- */
- glPixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE);
-
- for (level = userLevel; level <= levels; level++) {
- if (newImage_width == newwidth) {
- /* Use newImage for this level */
- if (baseLevel <= level && level <= maxLevel) {
- glTexImage1D(target, level, internalFormat, newImage_width,
- 0, format, GL_UNSIGNED_SHORT, (void *) newImage);
- }
- } else {
- if (otherImage == NULL) {
- memreq = image_size(newwidth, 1, format, GL_UNSIGNED_SHORT);
- otherImage = (GLushort *) malloc(memreq);
- if (otherImage == NULL) {
- glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
- glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS,psm.unpack_skip_pixels);
- glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
- glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
- free(newImage);
- return GLU_OUT_OF_MEMORY;
- }
- }
- scale_internal(cmpts, newImage_width, 1, newImage,
- newwidth, 1, otherImage);
- /* Swap newImage and otherImage */
- imageTemp = otherImage;
- otherImage = newImage;
- newImage = imageTemp;
-
- newImage_width = newwidth;
- if (baseLevel <= level && level <= maxLevel) {
- glTexImage1D(target, level, internalFormat, newImage_width,
- 0, format, GL_UNSIGNED_SHORT, (void *) newImage);
- }
- }
- if (newwidth > 1) newwidth /= 2;
- }
- glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
- glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
- glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
- glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
-
- free((GLbyte *) newImage);
- if (otherImage) {
- free((GLbyte *) otherImage);
- }
- return 0;
-}
-
-GLint GLAPIENTRY
-gluBuild1DMipmapLevels(GLenum target, GLint internalFormat,
- GLsizei width,
- GLenum format, GLenum type,
- GLint userLevel, GLint baseLevel, GLint maxLevel,
- const void *data)
-{
- int levels;
-
- int rc= checkMipmapArgs(internalFormat,format,type);
- if (rc != 0) return rc;
-
- if (width < 1) {
- return GLU_INVALID_VALUE;
- }
-
- levels = computeLog(width);
-
- levels+= userLevel;
- if (!isLegalLevels(userLevel,baseLevel,maxLevel,levels))
- return GLU_INVALID_VALUE;
-
- return gluBuild1DMipmapLevelsCore(target, internalFormat,
- width,
- width,format, type,
- userLevel, baseLevel, maxLevel,
- data);
-} /* gluBuild1DMipmapLevels() */
-
-GLint GLAPIENTRY
-gluBuild1DMipmaps(GLenum target, GLint internalFormat, GLsizei width,
- GLenum format, GLenum type,
- const void *data)
-{
- GLint widthPowerOf2;
- int levels;
- GLint dummy;
-
- int rc= checkMipmapArgs(internalFormat,format,type);
- if (rc != 0) return rc;
-
- if (width < 1) {
- return GLU_INVALID_VALUE;
- }
-
- closestFit(target,width,1,internalFormat,format,type,&widthPowerOf2,&dummy);
- levels = computeLog(widthPowerOf2);
-
- return gluBuild1DMipmapLevelsCore(target,internalFormat,
- width,
- widthPowerOf2,
- format,type,0,0,levels,data);
-}
-
-static int bitmapBuild2DMipmaps(GLenum target, GLint internalFormat,
- GLint width, GLint height, GLenum format,
- GLenum type, const void *data)
-{
- GLint newwidth, newheight;
- GLint level, levels;
- GLushort *newImage;
- GLint newImage_width;
- GLint newImage_height;
- GLushort *otherImage;
- GLushort *imageTemp;
- GLint memreq;
- GLint cmpts;
- PixelStorageModes psm;
-
- retrieveStoreModes(&psm);
-
-#if 0
- glGetIntegerv(GL_MAX_TEXTURE_SIZE, &maxsize);
- newwidth = nearestPower(width);
- if (newwidth > maxsize) newwidth = maxsize;
- newheight = nearestPower(height);
- if (newheight > maxsize) newheight = maxsize;
-#else
- closestFit(target,width,height,internalFormat,format,type,
- &newwidth,&newheight);
-#endif
- levels = computeLog(newwidth);
- level = computeLog(newheight);
- if (level > levels) levels=level;
-
- otherImage = NULL;
- newImage = (GLushort *)
- malloc(image_size(width, height, format, GL_UNSIGNED_SHORT));
- newImage_width = width;
- newImage_height = height;
- if (newImage == NULL) {
- return GLU_OUT_OF_MEMORY;
- }
-
- fill_image(&psm,width, height, format, type, is_index(format),
- data, newImage);
-
- cmpts = elements_per_group(format,type);
- glPixelStorei(GL_UNPACK_ALIGNMENT, 2);
- glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
- glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
- /*
- ** If swap_bytes was set, swapping occurred in fill_image.
- */
- glPixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE);
-
- for (level = 0; level <= levels; level++) {
- if (newImage_width == newwidth && newImage_height == newheight) { /* Use newImage for this level */
- glTexImage2D(target, level, internalFormat, newImage_width,
- newImage_height, 0, format, GL_UNSIGNED_SHORT,
- (void *) newImage);
- } else {
- if (otherImage == NULL) {
- memreq =
- image_size(newwidth, newheight, format, GL_UNSIGNED_SHORT);
- otherImage = (GLushort *) malloc(memreq);
- if (otherImage == NULL) {
- glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
- glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS,psm.unpack_skip_pixels);
- glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
- glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
- free(newImage);
- return GLU_OUT_OF_MEMORY;
- }
- }
- scale_internal(cmpts, newImage_width, newImage_height, newImage,
- newwidth, newheight, otherImage);
- /* Swap newImage and otherImage */
- imageTemp = otherImage;
- otherImage = newImage;
- newImage = imageTemp;
-
- newImage_width = newwidth;
- newImage_height = newheight;
- glTexImage2D(target, level, internalFormat, newImage_width,
- newImage_height, 0, format, GL_UNSIGNED_SHORT,
- (void *) newImage);
- }
- if (newwidth > 1) newwidth /= 2;
- if (newheight > 1) newheight /= 2;
- }
- glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
- glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
- glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
- glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
-
- free((GLbyte *) newImage);
- if (otherImage) {
- free((GLbyte *) otherImage);
- }
- return 0;
-}
-
-/* To make swapping images less error prone */
-#define __GLU_INIT_SWAP_IMAGE void *tmpImage
-#define __GLU_SWAP_IMAGE(a,b) tmpImage = a; a = b; b = tmpImage;
-
-static int gluBuild2DMipmapLevelsCore(GLenum target, GLint internalFormat,
- GLsizei width, GLsizei height,
- GLsizei widthPowerOf2,
- GLsizei heightPowerOf2,
- GLenum format, GLenum type,
- GLint userLevel,
- GLint baseLevel,GLint maxLevel,
- const void *data)
-{
- GLint newwidth, newheight;
- GLint level, levels;
- const void *usersImage; /* passed from user. Don't touch! */
- void *srcImage, *dstImage; /* scratch area to build mipmapped images */
- __GLU_INIT_SWAP_IMAGE;
- GLint memreq;
- GLint cmpts;
-
- GLint myswap_bytes, groups_per_line, element_size, group_size;
- GLint rowsize, padding;
- PixelStorageModes psm;
-
- assert(checkMipmapArgs(internalFormat,format,type) == 0);
- assert(width >= 1 && height >= 1);
-
- if(type == GL_BITMAP) {
- return bitmapBuild2DMipmaps(target, internalFormat, width, height,
- format, type, data);
- }
-
- srcImage = dstImage = NULL;
-
- newwidth= widthPowerOf2;
- newheight= heightPowerOf2;
- levels = computeLog(newwidth);
- level = computeLog(newheight);
- if (level > levels) levels=level;
-
- levels+= userLevel;
-
- retrieveStoreModes(&psm);
- myswap_bytes = psm.unpack_swap_bytes;
- cmpts = elements_per_group(format,type);
- if (psm.unpack_row_length > 0) {
- groups_per_line = psm.unpack_row_length;
- } else {
- groups_per_line = width;
- }
-
- element_size = bytes_per_element(type);
- group_size = element_size * cmpts;
- if (element_size == 1) myswap_bytes = 0;
-
- rowsize = groups_per_line * group_size;
- padding = (rowsize % psm.unpack_alignment);
- if (padding) {
- rowsize += psm.unpack_alignment - padding;
- }
- usersImage = (const GLubyte *) data + psm.unpack_skip_rows * rowsize +
- psm.unpack_skip_pixels * group_size;
-
- glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
- glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
-
- level = userLevel;
-
- /* already power-of-two square */
- if (width == newwidth && height == newheight) {
- /* Use usersImage for level userLevel */
- if (baseLevel <= level && level <= maxLevel) {
- glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
- glTexImage2D(target, level, internalFormat, width,
- height, 0, format, type,
- usersImage);
- }
- glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
- if(levels == 0) { /* we're done. clean up and return */
- glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
- glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
- glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
- glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
- return 0;
- }
- {
- int nextWidth= newwidth/2;
- int nextHeight= newheight/2;
-
- /* clamp to 1 */
- if (nextWidth < 1) nextWidth= 1;
- if (nextHeight < 1) nextHeight= 1;
- memreq = image_size(nextWidth, nextHeight, format, type);
- }
-
- switch(type) {
- case GL_UNSIGNED_BYTE:
- dstImage = (GLubyte *)malloc(memreq);
- break;
- case GL_BYTE:
- dstImage = (GLbyte *)malloc(memreq);
- break;
- case GL_UNSIGNED_SHORT:
- dstImage = (GLushort *)malloc(memreq);
- break;
- case GL_SHORT:
- dstImage = (GLshort *)malloc(memreq);
- break;
- case GL_UNSIGNED_INT:
- dstImage = (GLuint *)malloc(memreq);
- break;
- case GL_INT:
- dstImage = (GLint *)malloc(memreq);
- break;
- case GL_FLOAT:
- dstImage = (GLfloat *)malloc(memreq);
- break;
- case GL_UNSIGNED_BYTE_3_3_2:
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- dstImage = (GLubyte *)malloc(memreq);
- break;
- case GL_UNSIGNED_SHORT_5_6_5:
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- case GL_UNSIGNED_SHORT_4_4_4_4:
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- case GL_UNSIGNED_SHORT_5_5_5_1:
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- dstImage = (GLushort *)malloc(memreq);
- break;
- case GL_UNSIGNED_INT_8_8_8_8:
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- case GL_UNSIGNED_INT_10_10_10_2:
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- dstImage = (GLuint *)malloc(memreq);
- break;
- default:
- return GLU_INVALID_ENUM;
- }
- if (dstImage == NULL) {
- glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
- glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
- glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
- glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
- return GLU_OUT_OF_MEMORY;
- }
- else
- switch(type) {
- case GL_UNSIGNED_BYTE:
- halveImage_ubyte(cmpts, width, height,
- (const GLubyte *)usersImage, (GLubyte *)dstImage,
- element_size, rowsize, group_size);
- break;
- case GL_BYTE:
- halveImage_byte(cmpts, width, height,
- (const GLbyte *)usersImage, (GLbyte *)dstImage,
- element_size, rowsize, group_size);
- break;
- case GL_UNSIGNED_SHORT:
- halveImage_ushort(cmpts, width, height,
- (const GLushort *)usersImage, (GLushort *)dstImage,
- element_size, rowsize, group_size, myswap_bytes);
- break;
- case GL_SHORT:
- halveImage_short(cmpts, width, height,
- (const GLshort *)usersImage, (GLshort *)dstImage,
- element_size, rowsize, group_size, myswap_bytes);
- break;
- case GL_UNSIGNED_INT:
- halveImage_uint(cmpts, width, height,
- (const GLuint *)usersImage, (GLuint *)dstImage,
- element_size, rowsize, group_size, myswap_bytes);
- break;
- case GL_INT:
- halveImage_int(cmpts, width, height,
- (const GLint *)usersImage, (GLint *)dstImage,
- element_size, rowsize, group_size, myswap_bytes);
- break;
- case GL_FLOAT:
- halveImage_float(cmpts, width, height,
- (const GLfloat *)usersImage, (GLfloat *)dstImage,
- element_size, rowsize, group_size, myswap_bytes);
- break;
- case GL_UNSIGNED_BYTE_3_3_2:
- assert(format == GL_RGB);
- halveImagePackedPixel(3,extract332,shove332,
- width,height,usersImage,dstImage,
- element_size,rowsize,myswap_bytes);
- break;
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- assert(format == GL_RGB);
- halveImagePackedPixel(3,extract233rev,shove233rev,
- width,height,usersImage,dstImage,
- element_size,rowsize,myswap_bytes);
- break;
- case GL_UNSIGNED_SHORT_5_6_5:
- halveImagePackedPixel(3,extract565,shove565,
- width,height,usersImage,dstImage,
- element_size,rowsize,myswap_bytes);
- break;
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- halveImagePackedPixel(3,extract565rev,shove565rev,
- width,height,usersImage,dstImage,
- element_size,rowsize,myswap_bytes);
- break;
- case GL_UNSIGNED_SHORT_4_4_4_4:
- halveImagePackedPixel(4,extract4444,shove4444,
- width,height,usersImage,dstImage,
- element_size,rowsize,myswap_bytes);
- break;
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- halveImagePackedPixel(4,extract4444rev,shove4444rev,
- width,height,usersImage,dstImage,
- element_size,rowsize,myswap_bytes);
- break;
- case GL_UNSIGNED_SHORT_5_5_5_1:
- halveImagePackedPixel(4,extract5551,shove5551,
- width,height,usersImage,dstImage,
- element_size,rowsize,myswap_bytes);
- break;
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- halveImagePackedPixel(4,extract1555rev,shove1555rev,
- width,height,usersImage,dstImage,
- element_size,rowsize,myswap_bytes);
- break;
- case GL_UNSIGNED_INT_8_8_8_8:
- halveImagePackedPixel(4,extract8888,shove8888,
- width,height,usersImage,dstImage,
- element_size,rowsize,myswap_bytes);
- break;
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- halveImagePackedPixel(4,extract8888rev,shove8888rev,
- width,height,usersImage,dstImage,
- element_size,rowsize,myswap_bytes);
- break;
- case GL_UNSIGNED_INT_10_10_10_2:
- halveImagePackedPixel(4,extract1010102,shove1010102,
- width,height,usersImage,dstImage,
- element_size,rowsize,myswap_bytes);
- break;
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- halveImagePackedPixel(4,extract2101010rev,shove2101010rev,
- width,height,usersImage,dstImage,
- element_size,rowsize,myswap_bytes);
- break;
- default:
- assert(0);
- break;
- }
- newwidth = width/2;
- newheight = height/2;
- /* clamp to 1 */
- if (newwidth < 1) newwidth= 1;
- if (newheight < 1) newheight= 1;
-
- myswap_bytes = 0;
- rowsize = newwidth * group_size;
- memreq = image_size(newwidth, newheight, format, type);
- /* Swap srcImage and dstImage */
- __GLU_SWAP_IMAGE(srcImage,dstImage);
- switch(type) {
- case GL_UNSIGNED_BYTE:
- dstImage = (GLubyte *)malloc(memreq);
- break;
- case GL_BYTE:
- dstImage = (GLbyte *)malloc(memreq);
- break;
- case GL_UNSIGNED_SHORT:
- dstImage = (GLushort *)malloc(memreq);
- break;
- case GL_SHORT:
- dstImage = (GLshort *)malloc(memreq);
- break;
- case GL_UNSIGNED_INT:
- dstImage = (GLuint *)malloc(memreq);
- break;
- case GL_INT:
- dstImage = (GLint *)malloc(memreq);
- break;
- case GL_FLOAT:
- dstImage = (GLfloat *)malloc(memreq);
- break;
- case GL_UNSIGNED_BYTE_3_3_2:
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- dstImage = (GLubyte *)malloc(memreq);
- break;
- case GL_UNSIGNED_SHORT_5_6_5:
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- case GL_UNSIGNED_SHORT_4_4_4_4:
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- case GL_UNSIGNED_SHORT_5_5_5_1:
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- dstImage = (GLushort *)malloc(memreq);
- break;
- case GL_UNSIGNED_INT_8_8_8_8:
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- case GL_UNSIGNED_INT_10_10_10_2:
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- dstImage = (GLuint *)malloc(memreq);
- break;
- default:
- return GLU_INVALID_ENUM;
- }
- if (dstImage == NULL) {
- glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
- glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
- glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
- glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
- free(srcImage);
- return GLU_OUT_OF_MEMORY;
- }
- /* level userLevel+1 is in srcImage; level userLevel already saved */
- level = userLevel+1;
- } else { /* user's image is *not* nice power-of-2 sized square */
- memreq = image_size(newwidth, newheight, format, type);
- switch(type) {
- case GL_UNSIGNED_BYTE:
- dstImage = (GLubyte *)malloc(memreq);
- break;
- case GL_BYTE:
- dstImage = (GLbyte *)malloc(memreq);
- break;
- case GL_UNSIGNED_SHORT:
- dstImage = (GLushort *)malloc(memreq);
- break;
- case GL_SHORT:
- dstImage = (GLshort *)malloc(memreq);
- break;
- case GL_UNSIGNED_INT:
- dstImage = (GLuint *)malloc(memreq);
- break;
- case GL_INT:
- dstImage = (GLint *)malloc(memreq);
- break;
- case GL_FLOAT:
- dstImage = (GLfloat *)malloc(memreq);
- break;
- case GL_UNSIGNED_BYTE_3_3_2:
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- dstImage = (GLubyte *)malloc(memreq);
- break;
- case GL_UNSIGNED_SHORT_5_6_5:
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- case GL_UNSIGNED_SHORT_4_4_4_4:
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- case GL_UNSIGNED_SHORT_5_5_5_1:
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- dstImage = (GLushort *)malloc(memreq);
- break;
- case GL_UNSIGNED_INT_8_8_8_8:
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- case GL_UNSIGNED_INT_10_10_10_2:
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- dstImage = (GLuint *)malloc(memreq);
- break;
- default:
- return GLU_INVALID_ENUM;
- }
-
- if (dstImage == NULL) {
- glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
- glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
- glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
- glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
- return GLU_OUT_OF_MEMORY;
- }
-
- switch(type) {
- case GL_UNSIGNED_BYTE:
- scale_internal_ubyte(cmpts, width, height,
- (const GLubyte *)usersImage, newwidth, newheight,
- (GLubyte *)dstImage, element_size,
- rowsize, group_size);
- break;
- case GL_BYTE:
- scale_internal_byte(cmpts, width, height,
- (const GLbyte *)usersImage, newwidth, newheight,
- (GLbyte *)dstImage, element_size,
- rowsize, group_size);
- break;
- case GL_UNSIGNED_SHORT:
- scale_internal_ushort(cmpts, width, height,
- (const GLushort *)usersImage, newwidth, newheight,
- (GLushort *)dstImage, element_size,
- rowsize, group_size, myswap_bytes);
- break;
- case GL_SHORT:
- scale_internal_short(cmpts, width, height,
- (const GLshort *)usersImage, newwidth, newheight,
- (GLshort *)dstImage, element_size,
- rowsize, group_size, myswap_bytes);
- break;
- case GL_UNSIGNED_INT:
- scale_internal_uint(cmpts, width, height,
- (const GLuint *)usersImage, newwidth, newheight,
- (GLuint *)dstImage, element_size,
- rowsize, group_size, myswap_bytes);
- break;
- case GL_INT:
- scale_internal_int(cmpts, width, height,
- (const GLint *)usersImage, newwidth, newheight,
- (GLint *)dstImage, element_size,
- rowsize, group_size, myswap_bytes);
- break;
- case GL_FLOAT:
- scale_internal_float(cmpts, width, height,
- (const GLfloat *)usersImage, newwidth, newheight,
- (GLfloat *)dstImage, element_size,
- rowsize, group_size, myswap_bytes);
- break;
- case GL_UNSIGNED_BYTE_3_3_2:
- scaleInternalPackedPixel(3,extract332,shove332,
- width, height,usersImage,
- newwidth,newheight,(void *)dstImage,
- element_size,rowsize,myswap_bytes);
- break;
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- scaleInternalPackedPixel(3,extract233rev,shove233rev,
- width, height,usersImage,
- newwidth,newheight,(void *)dstImage,
- element_size,rowsize,myswap_bytes);
- break;
- case GL_UNSIGNED_SHORT_5_6_5:
- scaleInternalPackedPixel(3,extract565,shove565,
- width, height,usersImage,
- newwidth,newheight,(void *)dstImage,
- element_size,rowsize,myswap_bytes);
- break;
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- scaleInternalPackedPixel(3,extract565rev,shove565rev,
- width, height,usersImage,
- newwidth,newheight,(void *)dstImage,
- element_size,rowsize,myswap_bytes);
- break;
- case GL_UNSIGNED_SHORT_4_4_4_4:
- scaleInternalPackedPixel(4,extract4444,shove4444,
- width, height,usersImage,
- newwidth,newheight,(void *)dstImage,
- element_size,rowsize,myswap_bytes);
- break;
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- scaleInternalPackedPixel(4,extract4444rev,shove4444rev,
- width, height,usersImage,
- newwidth,newheight,(void *)dstImage,
- element_size,rowsize,myswap_bytes);
- break;
- case GL_UNSIGNED_SHORT_5_5_5_1:
- scaleInternalPackedPixel(4,extract5551,shove5551,
- width, height,usersImage,
- newwidth,newheight,(void *)dstImage,
- element_size,rowsize,myswap_bytes);
- break;
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- scaleInternalPackedPixel(4,extract1555rev,shove1555rev,
- width, height,usersImage,
- newwidth,newheight,(void *)dstImage,
- element_size,rowsize,myswap_bytes);
- break;
- case GL_UNSIGNED_INT_8_8_8_8:
- scaleInternalPackedPixel(4,extract8888,shove8888,
- width, height,usersImage,
- newwidth,newheight,(void *)dstImage,
- element_size,rowsize,myswap_bytes);
- break;
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- scaleInternalPackedPixel(4,extract8888rev,shove8888rev,
- width, height,usersImage,
- newwidth,newheight,(void *)dstImage,
- element_size,rowsize,myswap_bytes);
- break;
- case GL_UNSIGNED_INT_10_10_10_2:
- scaleInternalPackedPixel(4,extract1010102,shove1010102,
- width, height,usersImage,
- newwidth,newheight,(void *)dstImage,
- element_size,rowsize,myswap_bytes);
- break;
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- scaleInternalPackedPixel(4,extract2101010rev,shove2101010rev,
- width, height,usersImage,
- newwidth,newheight,(void *)dstImage,
- element_size,rowsize,myswap_bytes);
- break;
- default:
- assert(0);
- break;
- }
- myswap_bytes = 0;
- rowsize = newwidth * group_size;
- /* Swap dstImage and srcImage */
- __GLU_SWAP_IMAGE(srcImage,dstImage);
-
- if(levels != 0) { /* use as little memory as possible */
- {
- int nextWidth= newwidth/2;
- int nextHeight= newheight/2;
- if (nextWidth < 1) nextWidth= 1;
- if (nextHeight < 1) nextHeight= 1;
-
- memreq = image_size(nextWidth, nextHeight, format, type);
- }
-
- switch(type) {
- case GL_UNSIGNED_BYTE:
- dstImage = (GLubyte *)malloc(memreq);
- break;
- case GL_BYTE:
- dstImage = (GLbyte *)malloc(memreq);
- break;
- case GL_UNSIGNED_SHORT:
- dstImage = (GLushort *)malloc(memreq);
- break;
- case GL_SHORT:
- dstImage = (GLshort *)malloc(memreq);
- break;
- case GL_UNSIGNED_INT:
- dstImage = (GLuint *)malloc(memreq);
- break;
- case GL_INT:
- dstImage = (GLint *)malloc(memreq);
- break;
- case GL_FLOAT:
- dstImage = (GLfloat *)malloc(memreq);
- break;
- case GL_UNSIGNED_BYTE_3_3_2:
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- dstImage = (GLubyte *)malloc(memreq);
- break;
- case GL_UNSIGNED_SHORT_5_6_5:
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- case GL_UNSIGNED_SHORT_4_4_4_4:
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- case GL_UNSIGNED_SHORT_5_5_5_1:
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- dstImage = (GLushort *)malloc(memreq);
- break;
- case GL_UNSIGNED_INT_8_8_8_8:
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- case GL_UNSIGNED_INT_10_10_10_2:
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- dstImage = (GLuint *)malloc(memreq);
- break;
- default:
- return GLU_INVALID_ENUM;
- }
- if (dstImage == NULL) {
- glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
- glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
- glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
- glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
- free(srcImage);
- return GLU_OUT_OF_MEMORY;
- }
- }
- /* level userLevel is in srcImage; nothing saved yet */
- level = userLevel;
- }
-
- glPixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE);
- if (baseLevel <= level && level <= maxLevel) {
- glTexImage2D(target, level, internalFormat, newwidth, newheight, 0,
- format, type, (void *)srcImage);
- }
-
- level++; /* update current level for the loop */
- for (; level <= levels; level++) {
- switch(type) {
- case GL_UNSIGNED_BYTE:
- halveImage_ubyte(cmpts, newwidth, newheight,
- (GLubyte *)srcImage, (GLubyte *)dstImage, element_size,
- rowsize, group_size);
- break;
- case GL_BYTE:
- halveImage_byte(cmpts, newwidth, newheight,
- (GLbyte *)srcImage, (GLbyte *)dstImage, element_size,
- rowsize, group_size);
- break;
- case GL_UNSIGNED_SHORT:
- halveImage_ushort(cmpts, newwidth, newheight,
- (GLushort *)srcImage, (GLushort *)dstImage, element_size,
- rowsize, group_size, myswap_bytes);
- break;
- case GL_SHORT:
- halveImage_short(cmpts, newwidth, newheight,
- (GLshort *)srcImage, (GLshort *)dstImage, element_size,
- rowsize, group_size, myswap_bytes);
- break;
- case GL_UNSIGNED_INT:
- halveImage_uint(cmpts, newwidth, newheight,
- (GLuint *)srcImage, (GLuint *)dstImage, element_size,
- rowsize, group_size, myswap_bytes);
- break;
- case GL_INT:
- halveImage_int(cmpts, newwidth, newheight,
- (GLint *)srcImage, (GLint *)dstImage, element_size,
- rowsize, group_size, myswap_bytes);
- break;
- case GL_FLOAT:
- halveImage_float(cmpts, newwidth, newheight,
- (GLfloat *)srcImage, (GLfloat *)dstImage, element_size,
- rowsize, group_size, myswap_bytes);
- break;
- case GL_UNSIGNED_BYTE_3_3_2:
- halveImagePackedPixel(3,extract332,shove332,
- newwidth,newheight,
- srcImage,dstImage,element_size,rowsize,
- myswap_bytes);
- break;
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- halveImagePackedPixel(3,extract233rev,shove233rev,
- newwidth,newheight,
- srcImage,dstImage,element_size,rowsize,
- myswap_bytes);
- break;
- case GL_UNSIGNED_SHORT_5_6_5:
- halveImagePackedPixel(3,extract565,shove565,
- newwidth,newheight,
- srcImage,dstImage,element_size,rowsize,
- myswap_bytes);
- break;
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- halveImagePackedPixel(3,extract565rev,shove565rev,
- newwidth,newheight,
- srcImage,dstImage,element_size,rowsize,
- myswap_bytes);
- break;
- case GL_UNSIGNED_SHORT_4_4_4_4:
- halveImagePackedPixel(4,extract4444,shove4444,
- newwidth,newheight,
- srcImage,dstImage,element_size,rowsize,
- myswap_bytes);
- break;
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- halveImagePackedPixel(4,extract4444rev,shove4444rev,
- newwidth,newheight,
- srcImage,dstImage,element_size,rowsize,
- myswap_bytes);
- break;
- case GL_UNSIGNED_SHORT_5_5_5_1:
- halveImagePackedPixel(4,extract5551,shove5551,
- newwidth,newheight,
- srcImage,dstImage,element_size,rowsize,
- myswap_bytes);
- break;
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- halveImagePackedPixel(4,extract1555rev,shove1555rev,
- newwidth,newheight,
- srcImage,dstImage,element_size,rowsize,
- myswap_bytes);
- break;
- case GL_UNSIGNED_INT_8_8_8_8:
- halveImagePackedPixel(4,extract8888,shove8888,
- newwidth,newheight,
- srcImage,dstImage,element_size,rowsize,
- myswap_bytes);
- break;
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- halveImagePackedPixel(4,extract8888rev,shove8888rev,
- newwidth,newheight,
- srcImage,dstImage,element_size,rowsize,
- myswap_bytes);
- break;
- case GL_UNSIGNED_INT_10_10_10_2:
- halveImagePackedPixel(4,extract1010102,shove1010102,
- newwidth,newheight,
- srcImage,dstImage,element_size,rowsize,
- myswap_bytes);
- break;
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- halveImagePackedPixel(4,extract2101010rev,shove2101010rev,
- newwidth,newheight,
- srcImage,dstImage,element_size,rowsize,
- myswap_bytes);
- break;
- default:
- assert(0);
- break;
- }
-
- __GLU_SWAP_IMAGE(srcImage,dstImage);
-
- if (newwidth > 1) { newwidth /= 2; rowsize /= 2;}
- if (newheight > 1) newheight /= 2;
- {
- /* compute amount to pad per row, if any */
- int rowPad= rowsize % psm.unpack_alignment;
-
- /* should row be padded? */
- if (rowPad == 0) { /* nope, row should not be padded */
- /* call tex image with srcImage untouched since it's not padded */
- if (baseLevel <= level && level <= maxLevel) {
- glTexImage2D(target, level, internalFormat, newwidth, newheight, 0,
- format, type, (void *) srcImage);
- }
- }
- else { /* yes, row should be padded */
- /* compute length of new row in bytes, including padding */
- int newRowLength= rowsize + psm.unpack_alignment - rowPad;
- int ii; unsigned char *dstTrav, *srcTrav; /* indices for copying */
-
- /* allocate new image for mipmap of size newRowLength x newheight */
- void *newMipmapImage= malloc((size_t) (newRowLength*newheight));
- if (newMipmapImage == NULL) {
- /* out of memory so return */
- glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
- glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
- glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
- glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
- return GLU_OUT_OF_MEMORY;
- }
-
- /* copy image from srcImage into newMipmapImage by rows */
- for (ii= 0,
- dstTrav= (unsigned char *) newMipmapImage,
- srcTrav= (unsigned char *) srcImage;
- ii< newheight;
- ii++,
- dstTrav+= newRowLength, /* make sure the correct distance... */
- srcTrav+= rowsize) { /* ...is skipped */
- memcpy(dstTrav,srcTrav,rowsize);
- /* note that the pad bytes are not visited and will contain
- * garbage, which is ok.
- */
- }
-
- /* ...and use this new image for mipmapping instead */
- if (baseLevel <= level && level <= maxLevel) {
- glTexImage2D(target, level, internalFormat, newwidth, newheight, 0,
- format, type, newMipmapImage);
- }
- free(newMipmapImage); /* don't forget to free it! */
- } /* else */
- }
- } /* for level */
- glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
- glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
- glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
- glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
-
- free(srcImage); /*if you get to here, a srcImage has always been malloc'ed*/
- if (dstImage) { /* if it's non-rectangular and only 1 level */
- free(dstImage);
- }
- return 0;
-} /* gluBuild2DMipmapLevelsCore() */
-
-GLint GLAPIENTRY
-gluBuild2DMipmapLevels(GLenum target, GLint internalFormat,
- GLsizei width, GLsizei height,
- GLenum format, GLenum type,
- GLint userLevel, GLint baseLevel, GLint maxLevel,
- const void *data)
-{
- int level, levels;
-
- int rc= checkMipmapArgs(internalFormat,format,type);
- if (rc != 0) return rc;
-
- if (width < 1 || height < 1) {
- return GLU_INVALID_VALUE;
- }
-
- levels = computeLog(width);
- level = computeLog(height);
- if (level > levels) levels=level;
-
- levels+= userLevel;
- if (!isLegalLevels(userLevel,baseLevel,maxLevel,levels))
- return GLU_INVALID_VALUE;
-
- return gluBuild2DMipmapLevelsCore(target, internalFormat,
- width, height,
- width, height,
- format, type,
- userLevel, baseLevel, maxLevel,
- data);
-} /* gluBuild2DMipmapLevels() */
-
-GLint GLAPIENTRY
-gluBuild2DMipmaps(GLenum target, GLint internalFormat,
- GLsizei width, GLsizei height,
- GLenum format, GLenum type,
- const void *data)
-{
- GLint widthPowerOf2, heightPowerOf2;
- int level, levels;
-
- int rc= checkMipmapArgs(internalFormat,format,type);
- if (rc != 0) return rc;
-
- if (width < 1 || height < 1) {
- return GLU_INVALID_VALUE;
- }
-
- closestFit(target,width,height,internalFormat,format,type,
- &widthPowerOf2,&heightPowerOf2);
-
- levels = computeLog(widthPowerOf2);
- level = computeLog(heightPowerOf2);
- if (level > levels) levels=level;
-
- return gluBuild2DMipmapLevelsCore(target,internalFormat,
- width, height,
- widthPowerOf2,heightPowerOf2,
- format,type,
- 0,0,levels,data);
-} /* gluBuild2DMipmaps() */
-
-#if 0
-/*
-** This routine is for the limited case in which
-** type == GL_UNSIGNED_BYTE && format != index &&
-** unpack_alignment = 1 && unpack_swap_bytes == false
-**
-** so all of the work data can be kept as ubytes instead of shorts.
-*/
-static int fastBuild2DMipmaps(const PixelStorageModes *psm,
- GLenum target, GLint components, GLint width,
- GLint height, GLenum format,
- GLenum type, void *data)
-{
- GLint newwidth, newheight;
- GLint level, levels;
- GLubyte *newImage;
- GLint newImage_width;
- GLint newImage_height;
- GLubyte *otherImage;
- GLubyte *imageTemp;
- GLint memreq;
- GLint cmpts;
-
-
-#if 0
- glGetIntegerv(GL_MAX_TEXTURE_SIZE, &maxsize);
- newwidth = nearestPower(width);
- if (newwidth > maxsize) newwidth = maxsize;
- newheight = nearestPower(height);
- if (newheight > maxsize) newheight = maxsize;
-#else
- closestFit(target,width,height,components,format,type,
- &newwidth,&newheight);
-#endif
- levels = computeLog(newwidth);
- level = computeLog(newheight);
- if (level > levels) levels=level;
-
- cmpts = elements_per_group(format,type);
-
- otherImage = NULL;
- /**
- ** No need to copy the user data if its in the packed correctly.
- ** Make sure that later routines don't change that data.
- */
- if (psm->unpack_skip_rows == 0 && psm->unpack_skip_pixels == 0) {
- newImage = (GLubyte *)data;
- newImage_width = width;
- newImage_height = height;
- } else {
- GLint rowsize;
- GLint groups_per_line;
- GLint elements_per_line;
- const GLubyte *start;
- const GLubyte *iter;
- GLubyte *iter2;
- GLint i, j;
-
- newImage = (GLubyte *)
- malloc(image_size(width, height, format, GL_UNSIGNED_BYTE));
- newImage_width = width;
- newImage_height = height;
- if (newImage == NULL) {
- return GLU_OUT_OF_MEMORY;
- }
-
- /*
- ** Abbreviated version of fill_image for this restricted case.
- */
- if (psm->unpack_row_length > 0) {
- groups_per_line = psm->unpack_row_length;
- } else {
- groups_per_line = width;
- }
- rowsize = groups_per_line * cmpts;
- elements_per_line = width * cmpts;
- start = (const GLubyte *) data + psm->unpack_skip_rows * rowsize +
- psm->unpack_skip_pixels * cmpts;
- iter2 = newImage;
-
- for (i = 0; i < height; i++) {
- iter = start;
- for (j = 0; j < elements_per_line; j++) {
- *iter2 = *iter;
- iter++;
- iter2++;
- }
- start += rowsize;
- }
- }
-
-
- glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
- glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
- glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
- glPixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE);
-
- for (level = 0; level <= levels; level++) {
- if (newImage_width == newwidth && newImage_height == newheight) {
- /* Use newImage for this level */
- glTexImage2D(target, level, components, newImage_width,
- newImage_height, 0, format, GL_UNSIGNED_BYTE,
- (void *) newImage);
- } else {
- if (otherImage == NULL) {
- memreq =
- image_size(newwidth, newheight, format, GL_UNSIGNED_BYTE);
- otherImage = (GLubyte *) malloc(memreq);
- if (otherImage == NULL) {
- glPixelStorei(GL_UNPACK_ALIGNMENT, psm->unpack_alignment);
- glPixelStorei(GL_UNPACK_SKIP_ROWS, psm->unpack_skip_rows);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm->unpack_skip_pixels);
- glPixelStorei(GL_UNPACK_ROW_LENGTH,psm->unpack_row_length);
- glPixelStorei(GL_UNPACK_SWAP_BYTES,psm->unpack_swap_bytes);
- return GLU_OUT_OF_MEMORY;
- }
- }
-/*
- scale_internal_ubyte(cmpts, newImage_width, newImage_height,
- newImage, newwidth, newheight, otherImage);
-*/
- /* Swap newImage and otherImage */
- imageTemp = otherImage;
- otherImage = newImage;
- newImage = imageTemp;
-
- newImage_width = newwidth;
- newImage_height = newheight;
- glTexImage2D(target, level, components, newImage_width,
- newImage_height, 0, format, GL_UNSIGNED_BYTE,
- (void *) newImage);
- }
- if (newwidth > 1) newwidth /= 2;
- if (newheight > 1) newheight /= 2;
- }
- glPixelStorei(GL_UNPACK_ALIGNMENT, psm->unpack_alignment);
- glPixelStorei(GL_UNPACK_SKIP_ROWS, psm->unpack_skip_rows);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm->unpack_skip_pixels);
- glPixelStorei(GL_UNPACK_ROW_LENGTH, psm->unpack_row_length);
- glPixelStorei(GL_UNPACK_SWAP_BYTES, psm->unpack_swap_bytes);
-
- if (newImage != (const GLubyte *)data) {
- free((GLbyte *) newImage);
- }
- if (otherImage && otherImage != (const GLubyte *)data) {
- free((GLbyte *) otherImage);
- }
- return 0;
-}
-#endif
-
-/*
- * Utility Routines
- */
-static GLint elements_per_group(GLenum format, GLenum type)
-{
- /*
- * Return the number of elements per group of a specified format
- */
-
- /* If the type is packedpixels then answer is 1 (ignore format) */
- if (type == GL_UNSIGNED_BYTE_3_3_2 ||
- type == GL_UNSIGNED_BYTE_2_3_3_REV ||
- type == GL_UNSIGNED_SHORT_5_6_5 ||
- type == GL_UNSIGNED_SHORT_5_6_5_REV ||
- type == GL_UNSIGNED_SHORT_4_4_4_4 ||
- type == GL_UNSIGNED_SHORT_4_4_4_4_REV ||
- type == GL_UNSIGNED_SHORT_5_5_5_1 ||
- type == GL_UNSIGNED_SHORT_1_5_5_5_REV ||
- type == GL_UNSIGNED_INT_8_8_8_8 ||
- type == GL_UNSIGNED_INT_8_8_8_8_REV ||
- type == GL_UNSIGNED_INT_10_10_10_2 ||
- type == GL_UNSIGNED_INT_2_10_10_10_REV) {
- return 1;
- }
-
- /* Types are not packed pixels, so get elements per group */
- switch(format) {
- case GL_RGB:
- case GL_BGR:
- return 3;
- case GL_LUMINANCE_ALPHA:
- return 2;
- case GL_RGBA:
- case GL_BGRA:
- return 4;
- default:
- return 1;
- }
-}
-
-static GLfloat bytes_per_element(GLenum type)
-{
- /*
- * Return the number of bytes per element, based on the element type
- */
- switch(type) {
- case GL_BITMAP:
- return 1.0 / 8.0;
- case GL_UNSIGNED_SHORT:
- return(sizeof(GLushort));
- case GL_SHORT:
- return(sizeof(GLshort));
- case GL_UNSIGNED_BYTE:
- return(sizeof(GLubyte));
- case GL_BYTE:
- return(sizeof(GLbyte));
- case GL_INT:
- return(sizeof(GLint));
- case GL_UNSIGNED_INT:
- return(sizeof(GLuint));
- case GL_FLOAT:
- return(sizeof(GLfloat));
- case GL_UNSIGNED_BYTE_3_3_2:
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- return(sizeof(GLubyte));
- case GL_UNSIGNED_SHORT_5_6_5:
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- case GL_UNSIGNED_SHORT_4_4_4_4:
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- case GL_UNSIGNED_SHORT_5_5_5_1:
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- return(sizeof(GLushort));
- case GL_UNSIGNED_INT_8_8_8_8:
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- case GL_UNSIGNED_INT_10_10_10_2:
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- return(sizeof(GLuint));
- default:
- return 4;
- }
-}
-
-static GLint is_index(GLenum format)
-{
- return format == GL_COLOR_INDEX || format == GL_STENCIL_INDEX;
-}
-
-/*
-** Compute memory required for internal packed array of data of given type
-** and format.
-*/
-static GLint image_size(GLint width, GLint height, GLenum format, GLenum type)
-{
- int bytes_per_row;
- int components;
-
-assert(width > 0);
-assert(height > 0);
- components = elements_per_group(format,type);
- if (type == GL_BITMAP) {
- bytes_per_row = (width + 7) / 8;
- } else {
- bytes_per_row = bytes_per_element(type) * width;
- }
- return bytes_per_row * height * components;
-}
-
-/*
-** Extract array from user's data applying all pixel store modes.
-** The internal format used is an array of unsigned shorts.
-*/
-static void fill_image(const PixelStorageModes *psm,
- GLint width, GLint height, GLenum format,
- GLenum type, GLboolean index_format,
- const void *userdata, GLushort *newimage)
-{
- GLint components;
- GLint element_size;
- GLint rowsize;
- GLint padding;
- GLint groups_per_line;
- GLint group_size;
- GLint elements_per_line;
- const GLubyte *start;
- const GLubyte *iter;
- GLushort *iter2;
- GLint i, j, k;
- GLint myswap_bytes;
-
- myswap_bytes = psm->unpack_swap_bytes;
- components = elements_per_group(format,type);
- if (psm->unpack_row_length > 0) {
- groups_per_line = psm->unpack_row_length;
- } else {
- groups_per_line = width;
- }
-
- /* All formats except GL_BITMAP fall out trivially */
- if (type == GL_BITMAP) {
- GLint bit_offset;
- GLint current_bit;
-
- rowsize = (groups_per_line * components + 7) / 8;
- padding = (rowsize % psm->unpack_alignment);
- if (padding) {
- rowsize += psm->unpack_alignment - padding;
- }
- start = (const GLubyte *) userdata + psm->unpack_skip_rows * rowsize +
- (psm->unpack_skip_pixels * components / 8);
- elements_per_line = width * components;
- iter2 = newimage;
- for (i = 0; i < height; i++) {
- iter = start;
- bit_offset = (psm->unpack_skip_pixels * components) % 8;
- for (j = 0; j < elements_per_line; j++) {
- /* Retrieve bit */
- if (psm->unpack_lsb_first) {
- current_bit = iter[0] & (1 << bit_offset);
- } else {
- current_bit = iter[0] & (1 << (7 - bit_offset));
- }
- if (current_bit) {
- if (index_format) {
- *iter2 = 1;
- } else {
- *iter2 = 65535;
- }
- } else {
- *iter2 = 0;
- }
- bit_offset++;
- if (bit_offset == 8) {
- bit_offset = 0;
- iter++;
- }
- iter2++;
- }
- start += rowsize;
- }
- } else {
- element_size = bytes_per_element(type);
- group_size = element_size * components;
- if (element_size == 1) myswap_bytes = 0;
-
- rowsize = groups_per_line * group_size;
- padding = (rowsize % psm->unpack_alignment);
- if (padding) {
- rowsize += psm->unpack_alignment - padding;
- }
- start = (const GLubyte *) userdata + psm->unpack_skip_rows * rowsize +
- psm->unpack_skip_pixels * group_size;
- elements_per_line = width * components;
-
- iter2 = newimage;
- for (i = 0; i < height; i++) {
- iter = start;
- for (j = 0; j < elements_per_line; j++) {
- Type_Widget widget;
- float extractComponents[4];
-
- switch(type) {
- case GL_UNSIGNED_BYTE_3_3_2:
- extract332(0,iter,extractComponents);
- for (k = 0; k < 3; k++) {
- *iter2++ = (GLushort)(extractComponents[k]*65535);
- }
- break;
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- extract233rev(0,iter,extractComponents);
- for (k = 0; k < 3; k++) {
- *iter2++ = (GLushort)(extractComponents[k]*65535);
- }
- break;
- case GL_UNSIGNED_BYTE:
- if (index_format) {
- *iter2++ = *iter;
- } else {
- *iter2++ = (*iter) * 257;
- }
- break;
- case GL_BYTE:
- if (index_format) {
- *iter2++ = *((const GLbyte *) iter);
- } else {
- /* rough approx */
- *iter2++ = (*((const GLbyte *) iter)) * 516;
- }
- break;
- case GL_UNSIGNED_SHORT_5_6_5:
- extract565(myswap_bytes,iter,extractComponents);
- for (k = 0; k < 3; k++) {
- *iter2++ = (GLushort)(extractComponents[k]*65535);
- }
- break;
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- extract565rev(myswap_bytes,iter,extractComponents);
- for (k = 0; k < 3; k++) {
- *iter2++ = (GLushort)(extractComponents[k]*65535);
- }
- break;
- case GL_UNSIGNED_SHORT_4_4_4_4:
- extract4444(myswap_bytes,iter,extractComponents);
- for (k = 0; k < 4; k++) {
- *iter2++ = (GLushort)(extractComponents[k]*65535);
- }
- break;
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- extract4444rev(myswap_bytes,iter,extractComponents);
- for (k = 0; k < 4; k++) {
- *iter2++ = (GLushort)(extractComponents[k]*65535);
- }
- break;
- case GL_UNSIGNED_SHORT_5_5_5_1:
- extract5551(myswap_bytes,iter,extractComponents);
- for (k = 0; k < 4; k++) {
- *iter2++ = (GLushort)(extractComponents[k]*65535);
- }
- break;
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- extract1555rev(myswap_bytes,iter,extractComponents);
- for (k = 0; k < 4; k++) {
- *iter2++ = (GLushort)(extractComponents[k]*65535);
- }
- break;
- case GL_UNSIGNED_SHORT:
- case GL_SHORT:
- if (myswap_bytes) {
- widget.ub[0] = iter[1];
- widget.ub[1] = iter[0];
- } else {
- widget.ub[0] = iter[0];
- widget.ub[1] = iter[1];
- }
- if (type == GL_SHORT) {
- if (index_format) {
- *iter2++ = widget.s[0];
- } else {
- /* rough approx */
- *iter2++ = widget.s[0]*2;
- }
- } else {
- *iter2++ = widget.us[0];
- }
- break;
- case GL_UNSIGNED_INT_8_8_8_8:
- extract8888(myswap_bytes,iter,extractComponents);
- for (k = 0; k < 4; k++) {
- *iter2++ = (GLushort)(extractComponents[k]*65535);
- }
- break;
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- extract8888rev(myswap_bytes,iter,extractComponents);
- for (k = 0; k < 4; k++) {
- *iter2++ = (GLushort)(extractComponents[k]*65535);
- }
- break;
- case GL_UNSIGNED_INT_10_10_10_2:
- extract1010102(myswap_bytes,iter,extractComponents);
- for (k = 0; k < 4; k++) {
- *iter2++ = (GLushort)(extractComponents[k]*65535);
- }
- break;
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- extract2101010rev(myswap_bytes,iter,extractComponents);
- for (k = 0; k < 4; k++) {
- *iter2++ = (GLushort)(extractComponents[k]*65535);
- }
- break;
- case GL_INT:
- case GL_UNSIGNED_INT:
- case GL_FLOAT:
- if (myswap_bytes) {
- widget.ub[0] = iter[3];
- widget.ub[1] = iter[2];
- widget.ub[2] = iter[1];
- widget.ub[3] = iter[0];
- } else {
- widget.ub[0] = iter[0];
- widget.ub[1] = iter[1];
- widget.ub[2] = iter[2];
- widget.ub[3] = iter[3];
- }
- if (type == GL_FLOAT) {
- if (index_format) {
- *iter2++ = widget.f;
- } else {
- *iter2++ = 65535 * widget.f;
- }
- } else if (type == GL_UNSIGNED_INT) {
- if (index_format) {
- *iter2++ = widget.ui;
- } else {
- *iter2++ = widget.ui >> 16;
- }
- } else {
- if (index_format) {
- *iter2++ = widget.i;
- } else {
- *iter2++ = widget.i >> 15;
- }
- }
- break;
- }
- iter += element_size;
- } /* for j */
- start += rowsize;
-#if 1
- /* want 'iter' pointing at start, not within, row for assertion
- * purposes
- */
- iter= start;
-#endif
- } /* for i */
-
- /* iterators should be one byte past end */
- if (!isTypePackedPixel(type)) {
- assert(iter2 == &newimage[width*height*components]);
- }
- else {
- assert(iter2 == &newimage[width*height*
- elements_per_group(format,0)]);
- }
- assert( iter == &((const GLubyte *)userdata)[rowsize*height +
- psm->unpack_skip_rows * rowsize +
- psm->unpack_skip_pixels * group_size] );
-
- } /* else */
-} /* fill_image() */
-
-/*
-** Insert array into user's data applying all pixel store modes.
-** The internal format is an array of unsigned shorts.
-** empty_image() because it is the opposite of fill_image().
-*/
-static void empty_image(const PixelStorageModes *psm,
- GLint width, GLint height, GLenum format,
- GLenum type, GLboolean index_format,
- const GLushort *oldimage, void *userdata)
-{
- GLint components;
- GLint element_size;
- GLint rowsize;
- GLint padding;
- GLint groups_per_line;
- GLint group_size;
- GLint elements_per_line;
- GLubyte *start;
- GLubyte *iter;
- const GLushort *iter2;
- GLint i, j, k;
- GLint myswap_bytes;
-
- myswap_bytes = psm->pack_swap_bytes;
- components = elements_per_group(format,type);
- if (psm->pack_row_length > 0) {
- groups_per_line = psm->pack_row_length;
- } else {
- groups_per_line = width;
- }
-
- /* All formats except GL_BITMAP fall out trivially */
- if (type == GL_BITMAP) {
- GLint bit_offset;
- GLint current_bit;
-
- rowsize = (groups_per_line * components + 7) / 8;
- padding = (rowsize % psm->pack_alignment);
- if (padding) {
- rowsize += psm->pack_alignment - padding;
- }
- start = (GLubyte *) userdata + psm->pack_skip_rows * rowsize +
- (psm->pack_skip_pixels * components / 8);
- elements_per_line = width * components;
- iter2 = oldimage;
- for (i = 0; i < height; i++) {
- iter = start;
- bit_offset = (psm->pack_skip_pixels * components) % 8;
- for (j = 0; j < elements_per_line; j++) {
- if (index_format) {
- current_bit = iter2[0] & 1;
- } else {
- if (iter2[0] > 32767) {
- current_bit = 1;
- } else {
- current_bit = 0;
- }
- }
-
- if (current_bit) {
- if (psm->pack_lsb_first) {
- *iter |= (1 << bit_offset);
- } else {
- *iter |= (1 << (7 - bit_offset));
- }
- } else {
- if (psm->pack_lsb_first) {
- *iter &= ~(1 << bit_offset);
- } else {
- *iter &= ~(1 << (7 - bit_offset));
- }
- }
-
- bit_offset++;
- if (bit_offset == 8) {
- bit_offset = 0;
- iter++;
- }
- iter2++;
- }
- start += rowsize;
- }
- } else {
- float shoveComponents[4];
-
- element_size = bytes_per_element(type);
- group_size = element_size * components;
- if (element_size == 1) myswap_bytes = 0;
-
- rowsize = groups_per_line * group_size;
- padding = (rowsize % psm->pack_alignment);
- if (padding) {
- rowsize += psm->pack_alignment - padding;
- }
- start = (GLubyte *) userdata + psm->pack_skip_rows * rowsize +
- psm->pack_skip_pixels * group_size;
- elements_per_line = width * components;
-
- iter2 = oldimage;
- for (i = 0; i < height; i++) {
- iter = start;
- for (j = 0; j < elements_per_line; j++) {
- Type_Widget widget;
-
- switch(type) {
- case GL_UNSIGNED_BYTE_3_3_2:
- for (k = 0; k < 3; k++) {
- shoveComponents[k]= *iter2++ / 65535.0;
- }
- shove332(shoveComponents,0,(void *)iter);
- break;
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- for (k = 0; k < 3; k++) {
- shoveComponents[k]= *iter2++ / 65535.0;
- }
- shove233rev(shoveComponents,0,(void *)iter);
- break;
- case GL_UNSIGNED_BYTE:
- if (index_format) {
- *iter = *iter2++;
- } else {
- *iter = *iter2++ >> 8;
- }
- break;
- case GL_BYTE:
- if (index_format) {
- *((GLbyte *) iter) = *iter2++;
- } else {
- *((GLbyte *) iter) = *iter2++ >> 9;
- }
- break;
- case GL_UNSIGNED_SHORT_5_6_5:
- for (k = 0; k < 3; k++) {
- shoveComponents[k]= *iter2++ / 65535.0;
- }
- shove565(shoveComponents,0,(void *)&widget.us[0]);
- if (myswap_bytes) {
- iter[0] = widget.ub[1];
- iter[1] = widget.ub[0];
- }
- else {
- *(GLushort *)iter = widget.us[0];
- }
- break;
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- for (k = 0; k < 3; k++) {
- shoveComponents[k]= *iter2++ / 65535.0;
- }
- shove565rev(shoveComponents,0,(void *)&widget.us[0]);
- if (myswap_bytes) {
- iter[0] = widget.ub[1];
- iter[1] = widget.ub[0];
- }
- else {
- *(GLushort *)iter = widget.us[0];
- }
- break;
- case GL_UNSIGNED_SHORT_4_4_4_4:
- for (k = 0; k < 4; k++) {
- shoveComponents[k]= *iter2++ / 65535.0;
- }
- shove4444(shoveComponents,0,(void *)&widget.us[0]);
- if (myswap_bytes) {
- iter[0] = widget.ub[1];
- iter[1] = widget.ub[0];
- } else {
- *(GLushort *)iter = widget.us[0];
- }
- break;
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- for (k = 0; k < 4; k++) {
- shoveComponents[k]= *iter2++ / 65535.0;
- }
- shove4444rev(shoveComponents,0,(void *)&widget.us[0]);
- if (myswap_bytes) {
- iter[0] = widget.ub[1];
- iter[1] = widget.ub[0];
- } else {
- *(GLushort *)iter = widget.us[0];
- }
- break;
- case GL_UNSIGNED_SHORT_5_5_5_1:
- for (k = 0; k < 4; k++) {
- shoveComponents[k]= *iter2++ / 65535.0;
- }
- shove5551(shoveComponents,0,(void *)&widget.us[0]);
- if (myswap_bytes) {
- iter[0] = widget.ub[1];
- iter[1] = widget.ub[0];
- } else {
- *(GLushort *)iter = widget.us[0];
- }
- break;
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- for (k = 0; k < 4; k++) {
- shoveComponents[k]= *iter2++ / 65535.0;
- }
- shove1555rev(shoveComponents,0,(void *)&widget.us[0]);
- if (myswap_bytes) {
- iter[0] = widget.ub[1];
- iter[1] = widget.ub[0];
- } else {
- *(GLushort *)iter = widget.us[0];
- }
- break;
- case GL_UNSIGNED_SHORT:
- case GL_SHORT:
- if (type == GL_SHORT) {
- if (index_format) {
- widget.s[0] = *iter2++;
- } else {
- widget.s[0] = *iter2++ >> 1;
- }
- } else {
- widget.us[0] = *iter2++;
- }
- if (myswap_bytes) {
- iter[0] = widget.ub[1];
- iter[1] = widget.ub[0];
- } else {
- iter[0] = widget.ub[0];
- iter[1] = widget.ub[1];
- }
- break;
- case GL_UNSIGNED_INT_8_8_8_8:
- for (k = 0; k < 4; k++) {
- shoveComponents[k]= *iter2++ / 65535.0;
- }
- shove8888(shoveComponents,0,(void *)&widget.ui);
- if (myswap_bytes) {
- iter[3] = widget.ub[0];
- iter[2] = widget.ub[1];
- iter[1] = widget.ub[2];
- iter[0] = widget.ub[3];
- } else {
- *(GLuint *)iter= widget.ui;
- }
-
- break;
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- for (k = 0; k < 4; k++) {
- shoveComponents[k]= *iter2++ / 65535.0;
- }
- shove8888rev(shoveComponents,0,(void *)&widget.ui);
- if (myswap_bytes) {
- iter[3] = widget.ub[0];
- iter[2] = widget.ub[1];
- iter[1] = widget.ub[2];
- iter[0] = widget.ub[3];
- } else {
- *(GLuint *)iter= widget.ui;
- }
- break;
- case GL_UNSIGNED_INT_10_10_10_2:
- for (k = 0; k < 4; k++) {
- shoveComponents[k]= *iter2++ / 65535.0;
- }
- shove1010102(shoveComponents,0,(void *)&widget.ui);
- if (myswap_bytes) {
- iter[3] = widget.ub[0];
- iter[2] = widget.ub[1];
- iter[1] = widget.ub[2];
- iter[0] = widget.ub[3];
- } else {
- *(GLuint *)iter= widget.ui;
- }
- break;
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- for (k = 0; k < 4; k++) {
- shoveComponents[k]= *iter2++ / 65535.0;
- }
- shove2101010rev(shoveComponents,0,(void *)&widget.ui);
- if (myswap_bytes) {
- iter[3] = widget.ub[0];
- iter[2] = widget.ub[1];
- iter[1] = widget.ub[2];
- iter[0] = widget.ub[3];
- } else {
- *(GLuint *)iter= widget.ui;
- }
- break;
- case GL_INT:
- case GL_UNSIGNED_INT:
- case GL_FLOAT:
- if (type == GL_FLOAT) {
- if (index_format) {
- widget.f = *iter2++;
- } else {
- widget.f = *iter2++ / (float) 65535.0;
- }
- } else if (type == GL_UNSIGNED_INT) {
- if (index_format) {
- widget.ui = *iter2++;
- } else {
- widget.ui = (unsigned int) *iter2++ * 65537;
- }
- } else {
- if (index_format) {
- widget.i = *iter2++;
- } else {
- widget.i = ((unsigned int) *iter2++ * 65537)/2;
- }
- }
- if (myswap_bytes) {
- iter[3] = widget.ub[0];
- iter[2] = widget.ub[1];
- iter[1] = widget.ub[2];
- iter[0] = widget.ub[3];
- } else {
- iter[0] = widget.ub[0];
- iter[1] = widget.ub[1];
- iter[2] = widget.ub[2];
- iter[3] = widget.ub[3];
- }
- break;
- }
- iter += element_size;
- } /* for j */
- start += rowsize;
-#if 1
- /* want 'iter' pointing at start, not within, row for assertion
- * purposes
- */
- iter= start;
-#endif
- } /* for i */
-
- /* iterators should be one byte past end */
- if (!isTypePackedPixel(type)) {
- assert(iter2 == &oldimage[width*height*components]);
- }
- else {
- assert(iter2 == &oldimage[width*height*
- elements_per_group(format,0)]);
- }
- assert( iter == &((GLubyte *)userdata)[rowsize*height +
- psm->pack_skip_rows * rowsize +
- psm->pack_skip_pixels * group_size] );
-
- } /* else */
-} /* empty_image() */
-
-/*--------------------------------------------------------------------------
- * Decimation of packed pixel types
- *--------------------------------------------------------------------------
- */
-static void extract332(int isSwap,
- const void *packedPixel, GLfloat extractComponents[])
-{
- GLubyte ubyte= *(const GLubyte *)packedPixel;
-
- isSwap= isSwap; /* turn off warnings */
-
- /* 11100000 == 0xe0 */
- /* 00011100 == 0x1c */
- /* 00000011 == 0x03 */
-
- extractComponents[0]= (float)((ubyte & 0xe0) >> 5) / 7.0;
- extractComponents[1]= (float)((ubyte & 0x1c) >> 2) / 7.0; /* 7 = 2^3-1 */
- extractComponents[2]= (float)((ubyte & 0x03) ) / 3.0; /* 3 = 2^2-1 */
-} /* extract332() */
-
-static void shove332(const GLfloat shoveComponents[],
- int index, void *packedPixel)
-{
- /* 11100000 == 0xe0 */
- /* 00011100 == 0x1c */
- /* 00000011 == 0x03 */
-
- assert(0.0 <= shoveComponents[0] && shoveComponents[0] <= 1.0);
- assert(0.0 <= shoveComponents[1] && shoveComponents[1] <= 1.0);
- assert(0.0 <= shoveComponents[2] && shoveComponents[2] <= 1.0);
-
- /* due to limited precision, need to round before shoving */
- ((GLubyte *)packedPixel)[index] =
- ((GLubyte)((shoveComponents[0] * 7)+0.5) << 5) & 0xe0;
- ((GLubyte *)packedPixel)[index] |=
- ((GLubyte)((shoveComponents[1] * 7)+0.5) << 2) & 0x1c;
- ((GLubyte *)packedPixel)[index] |=
- ((GLubyte)((shoveComponents[2] * 3)+0.5) ) & 0x03;
-} /* shove332() */
-
-static void extract233rev(int isSwap,
- const void *packedPixel, GLfloat extractComponents[])
-{
- GLubyte ubyte= *(const GLubyte *)packedPixel;
-
- isSwap= isSwap; /* turn off warnings */
-
- /* 0000,0111 == 0x07 */
- /* 0011,1000 == 0x38 */
- /* 1100,0000 == 0xC0 */
-
- extractComponents[0]= (float)((ubyte & 0x07) ) / 7.0;
- extractComponents[1]= (float)((ubyte & 0x38) >> 3) / 7.0;
- extractComponents[2]= (float)((ubyte & 0xC0) >> 6) / 3.0;
-} /* extract233rev() */
-
-static void shove233rev(const GLfloat shoveComponents[],
- int index, void *packedPixel)
-{
- /* 0000,0111 == 0x07 */
- /* 0011,1000 == 0x38 */
- /* 1100,0000 == 0xC0 */
-
- assert(0.0 <= shoveComponents[0] && shoveComponents[0] <= 1.0);
- assert(0.0 <= shoveComponents[1] && shoveComponents[1] <= 1.0);
- assert(0.0 <= shoveComponents[2] && shoveComponents[2] <= 1.0);
-
- /* due to limited precision, need to round before shoving */
- ((GLubyte *)packedPixel)[index] =
- ((GLubyte)((shoveComponents[0] * 7.0)+0.5) ) & 0x07;
- ((GLubyte *)packedPixel)[index]|=
- ((GLubyte)((shoveComponents[1] * 7.0)+0.5) << 3) & 0x38;
- ((GLubyte *)packedPixel)[index]|=
- ((GLubyte)((shoveComponents[2] * 3.0)+0.5) << 6) & 0xC0;
-} /* shove233rev() */
-
-static void extract565(int isSwap,
- const void *packedPixel, GLfloat extractComponents[])
-{
- GLushort ushort;
-
- if (isSwap) {
- ushort= __GLU_SWAP_2_BYTES(packedPixel);
- }
- else {
- ushort= *(const GLushort *)packedPixel;
- }
-
- /* 11111000,00000000 == 0xf800 */
- /* 00000111,11100000 == 0x07e0 */
- /* 00000000,00011111 == 0x001f */
-
- extractComponents[0]=(float)((ushort & 0xf800) >> 11) / 31.0;/* 31 = 2^5-1*/
- extractComponents[1]=(float)((ushort & 0x07e0) >> 5) / 63.0;/* 63 = 2^6-1*/
- extractComponents[2]=(float)((ushort & 0x001f) ) / 31.0;
-} /* extract565() */
-
-static void shove565(const GLfloat shoveComponents[],
- int index,void *packedPixel)
-{
- /* 11111000,00000000 == 0xf800 */
- /* 00000111,11100000 == 0x07e0 */
- /* 00000000,00011111 == 0x001f */
-
- assert(0.0 <= shoveComponents[0] && shoveComponents[0] <= 1.0);
- assert(0.0 <= shoveComponents[1] && shoveComponents[1] <= 1.0);
- assert(0.0 <= shoveComponents[2] && shoveComponents[2] <= 1.0);
-
- /* due to limited precision, need to round before shoving */
- ((GLushort *)packedPixel)[index] =
- ((GLushort)((shoveComponents[0] * 31)+0.5) << 11) & 0xf800;
- ((GLushort *)packedPixel)[index]|=
- ((GLushort)((shoveComponents[1] * 63)+0.5) << 5) & 0x07e0;
- ((GLushort *)packedPixel)[index]|=
- ((GLushort)((shoveComponents[2] * 31)+0.5) ) & 0x001f;
-} /* shove565() */
-
-static void extract565rev(int isSwap,
- const void *packedPixel, GLfloat extractComponents[])
-{
- GLushort ushort;
-
- if (isSwap) {
- ushort= __GLU_SWAP_2_BYTES(packedPixel);
- }
- else {
- ushort= *(const GLushort *)packedPixel;
- }
-
- /* 00000000,00011111 == 0x001f */
- /* 00000111,11100000 == 0x07e0 */
- /* 11111000,00000000 == 0xf800 */
-
- extractComponents[0]= (float)((ushort & 0x001F) ) / 31.0;
- extractComponents[1]= (float)((ushort & 0x07E0) >> 5) / 63.0;
- extractComponents[2]= (float)((ushort & 0xF800) >> 11) / 31.0;
-} /* extract565rev() */
-
-static void shove565rev(const GLfloat shoveComponents[],
- int index,void *packedPixel)
-{
- /* 00000000,00011111 == 0x001f */
- /* 00000111,11100000 == 0x07e0 */
- /* 11111000,00000000 == 0xf800 */
-
- assert(0.0 <= shoveComponents[0] && shoveComponents[0] <= 1.0);
- assert(0.0 <= shoveComponents[1] && shoveComponents[1] <= 1.0);
- assert(0.0 <= shoveComponents[2] && shoveComponents[2] <= 1.0);
-
- /* due to limited precision, need to round before shoving */
- ((GLushort *)packedPixel)[index] =
- ((GLushort)((shoveComponents[0] * 31.0)+0.5) ) & 0x001F;
- ((GLushort *)packedPixel)[index]|=
- ((GLushort)((shoveComponents[1] * 63.0)+0.5) << 5) & 0x07E0;
- ((GLushort *)packedPixel)[index]|=
- ((GLushort)((shoveComponents[2] * 31.0)+0.5) << 11) & 0xF800;
-} /* shove565rev() */
-
-static void extract4444(int isSwap,const void *packedPixel,
- GLfloat extractComponents[])
-{
- GLushort ushort;
-
- if (isSwap) {
- ushort= __GLU_SWAP_2_BYTES(packedPixel);
- }
- else {
- ushort= *(const GLushort *)packedPixel;
- }
-
- /* 11110000,00000000 == 0xf000 */
- /* 00001111,00000000 == 0x0f00 */
- /* 00000000,11110000 == 0x00f0 */
- /* 00000000,00001111 == 0x000f */
-
- extractComponents[0]= (float)((ushort & 0xf000) >> 12) / 15.0;/* 15=2^4-1 */
- extractComponents[1]= (float)((ushort & 0x0f00) >> 8) / 15.0;
- extractComponents[2]= (float)((ushort & 0x00f0) >> 4) / 15.0;
- extractComponents[3]= (float)((ushort & 0x000f) ) / 15.0;
-} /* extract4444() */
-
-static void shove4444(const GLfloat shoveComponents[],
- int index,void *packedPixel)
-{
- assert(0.0 <= shoveComponents[0] && shoveComponents[0] <= 1.0);
- assert(0.0 <= shoveComponents[1] && shoveComponents[1] <= 1.0);
- assert(0.0 <= shoveComponents[2] && shoveComponents[2] <= 1.0);
- assert(0.0 <= shoveComponents[3] && shoveComponents[3] <= 1.0);
-
- /* due to limited precision, need to round before shoving */
- ((GLushort *)packedPixel)[index] =
- ((GLushort)((shoveComponents[0] * 15)+0.5) << 12) & 0xf000;
- ((GLushort *)packedPixel)[index]|=
- ((GLushort)((shoveComponents[1] * 15)+0.5) << 8) & 0x0f00;
- ((GLushort *)packedPixel)[index]|=
- ((GLushort)((shoveComponents[2] * 15)+0.5) << 4) & 0x00f0;
- ((GLushort *)packedPixel)[index]|=
- ((GLushort)((shoveComponents[3] * 15)+0.5) ) & 0x000f;
-} /* shove4444() */
-
-static void extract4444rev(int isSwap,const void *packedPixel,
- GLfloat extractComponents[])
-{
- GLushort ushort;
-
- if (isSwap) {
- ushort= __GLU_SWAP_2_BYTES(packedPixel);
- }
- else {
- ushort= *(const GLushort *)packedPixel;
- }
-
- /* 00000000,00001111 == 0x000f */
- /* 00000000,11110000 == 0x00f0 */
- /* 00001111,00000000 == 0x0f00 */
- /* 11110000,00000000 == 0xf000 */
-
- /* 15 = 2^4-1 */
- extractComponents[0]= (float)((ushort & 0x000F) ) / 15.0;
- extractComponents[1]= (float)((ushort & 0x00F0) >> 4) / 15.0;
- extractComponents[2]= (float)((ushort & 0x0F00) >> 8) / 15.0;
- extractComponents[3]= (float)((ushort & 0xF000) >> 12) / 15.0;
-} /* extract4444rev() */
-
-static void shove4444rev(const GLfloat shoveComponents[],
- int index,void *packedPixel)
-{
- /* 00000000,00001111 == 0x000f */
- /* 00000000,11110000 == 0x00f0 */
- /* 00001111,00000000 == 0x0f00 */
- /* 11110000,00000000 == 0xf000 */
-
- assert(0.0 <= shoveComponents[0] && shoveComponents[0] <= 1.0);
- assert(0.0 <= shoveComponents[1] && shoveComponents[1] <= 1.0);
- assert(0.0 <= shoveComponents[2] && shoveComponents[2] <= 1.0);
- assert(0.0 <= shoveComponents[3] && shoveComponents[3] <= 1.0);
-
- /* due to limited precision, need to round before shoving */
- ((GLushort *)packedPixel)[index] =
- ((GLushort)((shoveComponents[0] * 15)+0.5) ) & 0x000F;
- ((GLushort *)packedPixel)[index]|=
- ((GLushort)((shoveComponents[1] * 15)+0.5) << 4) & 0x00F0;
- ((GLushort *)packedPixel)[index]|=
- ((GLushort)((shoveComponents[2] * 15)+0.5) << 8) & 0x0F00;
- ((GLushort *)packedPixel)[index]|=
- ((GLushort)((shoveComponents[3] * 15)+0.5) << 12) & 0xF000;
-} /* shove4444rev() */
-
-static void extract5551(int isSwap,const void *packedPixel,
- GLfloat extractComponents[])
-{
- GLushort ushort;
-
- if (isSwap) {
- ushort= __GLU_SWAP_2_BYTES(packedPixel);
- }
- else {
- ushort= *(const GLushort *)packedPixel;
- }
-
- /* 11111000,00000000 == 0xf800 */
- /* 00000111,11000000 == 0x07c0 */
- /* 00000000,00111110 == 0x003e */
- /* 00000000,00000001 == 0x0001 */
-
- extractComponents[0]=(float)((ushort & 0xf800) >> 11) / 31.0;/* 31 = 2^5-1*/
- extractComponents[1]=(float)((ushort & 0x07c0) >> 6) / 31.0;
- extractComponents[2]=(float)((ushort & 0x003e) >> 1) / 31.0;
- extractComponents[3]=(float)((ushort & 0x0001) );
-} /* extract5551() */
-
-static void shove5551(const GLfloat shoveComponents[],
- int index,void *packedPixel)
-{
- /* 11111000,00000000 == 0xf800 */
- /* 00000111,11000000 == 0x07c0 */
- /* 00000000,00111110 == 0x003e */
- /* 00000000,00000001 == 0x0001 */
-
- assert(0.0 <= shoveComponents[0] && shoveComponents[0] <= 1.0);
- assert(0.0 <= shoveComponents[1] && shoveComponents[1] <= 1.0);
- assert(0.0 <= shoveComponents[2] && shoveComponents[2] <= 1.0);
- assert(0.0 <= shoveComponents[3] && shoveComponents[3] <= 1.0);
-
- /* due to limited precision, need to round before shoving */
- ((GLushort *)packedPixel)[index] =
- ((GLushort)((shoveComponents[0] * 31)+0.5) << 11) & 0xf800;
- ((GLushort *)packedPixel)[index]|=
- ((GLushort)((shoveComponents[1] * 31)+0.5) << 6) & 0x07c0;
- ((GLushort *)packedPixel)[index]|=
- ((GLushort)((shoveComponents[2] * 31)+0.5) << 1) & 0x003e;
- ((GLushort *)packedPixel)[index]|=
- ((GLushort)((shoveComponents[3])+0.5) ) & 0x0001;
-} /* shove5551() */
-
-static void extract1555rev(int isSwap,const void *packedPixel,
- GLfloat extractComponents[])
-{
- GLushort ushort;
-
- if (isSwap) {
- ushort= __GLU_SWAP_2_BYTES(packedPixel);
- }
- else {
- ushort= *(const GLushort *)packedPixel;
- }
-
- /* 00000000,00011111 == 0x001F */
- /* 00000011,11100000 == 0x03E0 */
- /* 01111100,00000000 == 0x7C00 */
- /* 10000000,00000000 == 0x8000 */
-
- /* 31 = 2^5-1 */
- extractComponents[0]= (float)((ushort & 0x001F) ) / 31.0;
- extractComponents[1]= (float)((ushort & 0x03E0) >> 5) / 31.0;
- extractComponents[2]= (float)((ushort & 0x7C00) >> 10) / 31.0;
- extractComponents[3]= (float)((ushort & 0x8000) >> 15);
-} /* extract1555rev() */
-
-static void shove1555rev(const GLfloat shoveComponents[],
- int index,void *packedPixel)
-{
- /* 00000000,00011111 == 0x001F */
- /* 00000011,11100000 == 0x03E0 */
- /* 01111100,00000000 == 0x7C00 */
- /* 10000000,00000000 == 0x8000 */
-
- assert(0.0 <= shoveComponents[0] && shoveComponents[0] <= 1.0);
- assert(0.0 <= shoveComponents[1] && shoveComponents[1] <= 1.0);
- assert(0.0 <= shoveComponents[2] && shoveComponents[2] <= 1.0);
- assert(0.0 <= shoveComponents[3] && shoveComponents[3] <= 1.0);
-
- /* due to limited precision, need to round before shoving */
- ((GLushort *)packedPixel)[index] =
- ((GLushort)((shoveComponents[0] * 31)+0.5) ) & 0x001F;
- ((GLushort *)packedPixel)[index]|=
- ((GLushort)((shoveComponents[1] * 31)+0.5) << 5) & 0x03E0;
- ((GLushort *)packedPixel)[index]|=
- ((GLushort)((shoveComponents[2] * 31)+0.5) << 10) & 0x7C00;
- ((GLushort *)packedPixel)[index]|=
- ((GLushort)((shoveComponents[3])+0.5) << 15) & 0x8000;
-} /* shove1555rev() */
-
-static void extract8888(int isSwap,
- const void *packedPixel, GLfloat extractComponents[])
-{
- GLuint uint;
-
- if (isSwap) {
- uint= __GLU_SWAP_4_BYTES(packedPixel);
- }
- else {
- uint= *(const GLuint *)packedPixel;
- }
-
- /* 11111111,00000000,00000000,00000000 == 0xff000000 */
- /* 00000000,11111111,00000000,00000000 == 0x00ff0000 */
- /* 00000000,00000000,11111111,00000000 == 0x0000ff00 */
- /* 00000000,00000000,00000000,11111111 == 0x000000ff */
-
- /* 255 = 2^8-1 */
- extractComponents[0]= (float)((uint & 0xff000000) >> 24) / 255.0;
- extractComponents[1]= (float)((uint & 0x00ff0000) >> 16) / 255.0;
- extractComponents[2]= (float)((uint & 0x0000ff00) >> 8) / 255.0;
- extractComponents[3]= (float)((uint & 0x000000ff) ) / 255.0;
-} /* extract8888() */
-
-static void shove8888(const GLfloat shoveComponents[],
- int index,void *packedPixel)
-{
- /* 11111111,00000000,00000000,00000000 == 0xff000000 */
- /* 00000000,11111111,00000000,00000000 == 0x00ff0000 */
- /* 00000000,00000000,11111111,00000000 == 0x0000ff00 */
- /* 00000000,00000000,00000000,11111111 == 0x000000ff */
-
- assert(0.0 <= shoveComponents[0] && shoveComponents[0] <= 1.0);
- assert(0.0 <= shoveComponents[1] && shoveComponents[1] <= 1.0);
- assert(0.0 <= shoveComponents[2] && shoveComponents[2] <= 1.0);
- assert(0.0 <= shoveComponents[3] && shoveComponents[3] <= 1.0);
-
- /* due to limited precision, need to round before shoving */
- ((GLuint *)packedPixel)[index] =
- ((GLuint)((shoveComponents[0] * 255)+0.5) << 24) & 0xff000000;
- ((GLuint *)packedPixel)[index]|=
- ((GLuint)((shoveComponents[1] * 255)+0.5) << 16) & 0x00ff0000;
- ((GLuint *)packedPixel)[index]|=
- ((GLuint)((shoveComponents[2] * 255)+0.5) << 8) & 0x0000ff00;
- ((GLuint *)packedPixel)[index]|=
- ((GLuint)((shoveComponents[3] * 255)+0.5) ) & 0x000000ff;
-} /* shove8888() */
-
-static void extract8888rev(int isSwap,
- const void *packedPixel,GLfloat extractComponents[])
-{
- GLuint uint;
-
- if (isSwap) {
- uint= __GLU_SWAP_4_BYTES(packedPixel);
- }
- else {
- uint= *(const GLuint *)packedPixel;
- }
-
- /* 00000000,00000000,00000000,11111111 == 0x000000ff */
- /* 00000000,00000000,11111111,00000000 == 0x0000ff00 */
- /* 00000000,11111111,00000000,00000000 == 0x00ff0000 */
- /* 11111111,00000000,00000000,00000000 == 0xff000000 */
-
- /* 255 = 2^8-1 */
- extractComponents[0]= (float)((uint & 0x000000FF) ) / 255.0;
- extractComponents[1]= (float)((uint & 0x0000FF00) >> 8) / 255.0;
- extractComponents[2]= (float)((uint & 0x00FF0000) >> 16) / 255.0;
- extractComponents[3]= (float)((uint & 0xFF000000) >> 24) / 255.0;
-} /* extract8888rev() */
-
-static void shove8888rev(const GLfloat shoveComponents[],
- int index,void *packedPixel)
-{
- /* 00000000,00000000,00000000,11111111 == 0x000000ff */
- /* 00000000,00000000,11111111,00000000 == 0x0000ff00 */
- /* 00000000,11111111,00000000,00000000 == 0x00ff0000 */
- /* 11111111,00000000,00000000,00000000 == 0xff000000 */
-
- assert(0.0 <= shoveComponents[0] && shoveComponents[0] <= 1.0);
- assert(0.0 <= shoveComponents[1] && shoveComponents[1] <= 1.0);
- assert(0.0 <= shoveComponents[2] && shoveComponents[2] <= 1.0);
- assert(0.0 <= shoveComponents[3] && shoveComponents[3] <= 1.0);
-
- /* due to limited precision, need to round before shoving */
- ((GLuint *)packedPixel)[index] =
- ((GLuint)((shoveComponents[0] * 255)+0.5) ) & 0x000000FF;
- ((GLuint *)packedPixel)[index]|=
- ((GLuint)((shoveComponents[1] * 255)+0.5) << 8) & 0x0000FF00;
- ((GLuint *)packedPixel)[index]|=
- ((GLuint)((shoveComponents[2] * 255)+0.5) << 16) & 0x00FF0000;
- ((GLuint *)packedPixel)[index]|=
- ((GLuint)((shoveComponents[3] * 255)+0.5) << 24) & 0xFF000000;
-} /* shove8888rev() */
-
-static void extract1010102(int isSwap,
- const void *packedPixel,GLfloat extractComponents[])
-{
- GLuint uint;
-
- if (isSwap) {
- uint= __GLU_SWAP_4_BYTES(packedPixel);
- }
- else {
- uint= *(const GLuint *)packedPixel;
- }
-
- /* 11111111,11000000,00000000,00000000 == 0xffc00000 */
- /* 00000000,00111111,11110000,00000000 == 0x003ff000 */
- /* 00000000,00000000,00001111,11111100 == 0x00000ffc */
- /* 00000000,00000000,00000000,00000011 == 0x00000003 */
-
- /* 1023 = 2^10-1 */
- extractComponents[0]= (float)((uint & 0xffc00000) >> 22) / 1023.0;
- extractComponents[1]= (float)((uint & 0x003ff000) >> 12) / 1023.0;
- extractComponents[2]= (float)((uint & 0x00000ffc) >> 2) / 1023.0;
- extractComponents[3]= (float)((uint & 0x00000003) ) / 3.0;
-} /* extract1010102() */
-
-static void shove1010102(const GLfloat shoveComponents[],
- int index,void *packedPixel)
-{
- /* 11111111,11000000,00000000,00000000 == 0xffc00000 */
- /* 00000000,00111111,11110000,00000000 == 0x003ff000 */
- /* 00000000,00000000,00001111,11111100 == 0x00000ffc */
- /* 00000000,00000000,00000000,00000011 == 0x00000003 */
-
- assert(0.0 <= shoveComponents[0] && shoveComponents[0] <= 1.0);
- assert(0.0 <= shoveComponents[1] && shoveComponents[1] <= 1.0);
- assert(0.0 <= shoveComponents[2] && shoveComponents[2] <= 1.0);
- assert(0.0 <= shoveComponents[3] && shoveComponents[3] <= 1.0);
-
- /* due to limited precision, need to round before shoving */
- ((GLuint *)packedPixel)[index] =
- ((GLuint)((shoveComponents[0] * 1023)+0.5) << 22) & 0xffc00000;
- ((GLuint *)packedPixel)[index]|=
- ((GLuint)((shoveComponents[1] * 1023)+0.5) << 12) & 0x003ff000;
- ((GLuint *)packedPixel)[index]|=
- ((GLuint)((shoveComponents[2] * 1023)+0.5) << 2) & 0x00000ffc;
- ((GLuint *)packedPixel)[index]|=
- ((GLuint)((shoveComponents[3] * 3)+0.5) ) & 0x00000003;
-} /* shove1010102() */
-
-static void extract2101010rev(int isSwap,
- const void *packedPixel,
- GLfloat extractComponents[])
-{
- GLuint uint;
-
- if (isSwap) {
- uint= __GLU_SWAP_4_BYTES(packedPixel);
- }
- else {
- uint= *(const GLuint *)packedPixel;
- }
-
- /* 00000000,00000000,00000011,11111111 == 0x000003FF */
- /* 00000000,00001111,11111100,00000000 == 0x000FFC00 */
- /* 00111111,11110000,00000000,00000000 == 0x3FF00000 */
- /* 11000000,00000000,00000000,00000000 == 0xC0000000 */
-
- /* 1023 = 2^10-1 */
- extractComponents[0]= (float)((uint & 0x000003FF) ) / 1023.0;
- extractComponents[1]= (float)((uint & 0x000FFC00) >> 10) / 1023.0;
- extractComponents[2]= (float)((uint & 0x3FF00000) >> 20) / 1023.0;
- extractComponents[3]= (float)((uint & 0xC0000000) >> 30) / 3.0;
- /* 3 = 2^2-1 */
-} /* extract2101010rev() */
-
-static void shove2101010rev(const GLfloat shoveComponents[],
- int index,void *packedPixel)
-{
- /* 00000000,00000000,00000011,11111111 == 0x000003FF */
- /* 00000000,00001111,11111100,00000000 == 0x000FFC00 */
- /* 00111111,11110000,00000000,00000000 == 0x3FF00000 */
- /* 11000000,00000000,00000000,00000000 == 0xC0000000 */
-
- assert(0.0 <= shoveComponents[0] && shoveComponents[0] <= 1.0);
- assert(0.0 <= shoveComponents[1] && shoveComponents[1] <= 1.0);
- assert(0.0 <= shoveComponents[2] && shoveComponents[2] <= 1.0);
- assert(0.0 <= shoveComponents[3] && shoveComponents[3] <= 1.0);
-
- /* due to limited precision, need to round before shoving */
- ((GLuint *)packedPixel)[index] =
- ((GLuint)((shoveComponents[0] * 1023)+0.5) ) & 0x000003FF;
- ((GLuint *)packedPixel)[index]|=
- ((GLuint)((shoveComponents[1] * 1023)+0.5) << 10) & 0x000FFC00;
- ((GLuint *)packedPixel)[index]|=
- ((GLuint)((shoveComponents[2] * 1023)+0.5) << 20) & 0x3FF00000;
- ((GLuint *)packedPixel)[index]|=
- ((GLuint)((shoveComponents[3] * 3)+0.5) << 30) & 0xC0000000;
-} /* shove2101010rev() */
-
-static void scaleInternalPackedPixel(int components,
- void (*extractPackedPixel)
- (int, const void *,GLfloat []),
- void (*shovePackedPixel)
- (const GLfloat [], int, void *),
- GLint widthIn,GLint heightIn,
- const void *dataIn,
- GLint widthOut,GLint heightOut,
- void *dataOut,
- GLint pixelSizeInBytes,
- GLint rowSizeInBytes,GLint isSwap)
-{
- float convx;
- float convy;
- float percent;
-
- /* Max components in a format is 4, so... */
- float totals[4];
- float extractTotals[4], extractMoreTotals[4], shoveTotals[4];
-
- float area;
- int i,j,k,xindex;
-
- const char *temp, *temp0;
- int outindex;
-
- int lowx_int, highx_int, lowy_int, highy_int;
- float x_percent, y_percent;
- float lowx_float, highx_float, lowy_float, highy_float;
- float convy_float, convx_float;
- int convy_int, convx_int;
- int l, m;
- const char *left, *right;
-
- if (widthIn == widthOut*2 && heightIn == heightOut*2) {
- halveImagePackedPixel(components,extractPackedPixel,shovePackedPixel,
- widthIn, heightIn, dataIn, dataOut,
- pixelSizeInBytes,rowSizeInBytes,isSwap);
- return;
- }
- convy = (float) heightIn/heightOut;
- convx = (float) widthIn/widthOut;
- convy_int = floor(convy);
- convy_float = convy - convy_int;
- convx_int = floor(convx);
- convx_float = convx - convx_int;
-
- area = convx * convy;
-
- lowy_int = 0;
- lowy_float = 0;
- highy_int = convy_int;
- highy_float = convy_float;
-
- for (i = 0; i < heightOut; i++) {
- lowx_int = 0;
- lowx_float = 0;
- highx_int = convx_int;
- highx_float = convx_float;
-
- for (j = 0; j < widthOut; j++) {
- /*
- ** Ok, now apply box filter to box that goes from (lowx, lowy)
- ** to (highx, highy) on input data into this pixel on output
- ** data.
- */
- totals[0] = totals[1] = totals[2] = totals[3] = 0.0;
-
- /* calculate the value for pixels in the 1st row */
- xindex = lowx_int*pixelSizeInBytes;
- if((highy_int>lowy_int) && (highx_int>lowx_int)) {
-
- y_percent = 1-lowy_float;
- temp = (const char *)dataIn + xindex + lowy_int * rowSizeInBytes;
- percent = y_percent * (1-lowx_float);
-#if 0
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
- } else {
- totals[k] += *(const GLushort*)temp_index * percent;
- }
- }
-#else
- (*extractPackedPixel)(isSwap,temp,extractTotals);
- for (k = 0; k < components; k++) {
- totals[k]+= extractTotals[k] * percent;
- }
-#endif
- left = temp;
- for(l = lowx_int+1; l < highx_int; l++) {
- temp += pixelSizeInBytes;
-#if 0
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] +=
- __GLU_SWAP_2_BYTES(temp_index) * y_percent;
- } else {
- totals[k] += *(const GLushort*)temp_index * y_percent;
- }
- }
-#else
- (*extractPackedPixel)(isSwap,temp,extractTotals);
- for (k = 0; k < components; k++) {
- totals[k]+= extractTotals[k] * y_percent;
- }
-#endif
- }
- temp += pixelSizeInBytes;
- right = temp;
- percent = y_percent * highx_float;
-#if 0
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
- } else {
- totals[k] += *(const GLushort*)temp_index * percent;
- }
- }
-#else
- (*extractPackedPixel)(isSwap,temp,extractTotals);
- for (k = 0; k < components; k++) {
- totals[k]+= extractTotals[k] * percent;
- }
-#endif
-
- /* calculate the value for pixels in the last row */
-
- y_percent = highy_float;
- percent = y_percent * (1-lowx_float);
- temp = (const char *)dataIn + xindex + highy_int * rowSizeInBytes;
-#if 0
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
- } else {
- totals[k] += *(const GLushort*)temp_index * percent;
- }
- }
-#else
- (*extractPackedPixel)(isSwap,temp,extractTotals);
- for (k = 0; k < components; k++) {
- totals[k]+= extractTotals[k] * percent;
- }
-#endif
- for(l = lowx_int+1; l < highx_int; l++) {
- temp += pixelSizeInBytes;
-#if 0
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] +=
- __GLU_SWAP_2_BYTES(temp_index) * y_percent;
- } else {
- totals[k] += *(const GLushort*)temp_index * y_percent;
- }
- }
-#else
- (*extractPackedPixel)(isSwap,temp,extractTotals);
- for (k = 0; k < components; k++) {
- totals[k]+= extractTotals[k] * y_percent;
- }
-#endif
-
- }
- temp += pixelSizeInBytes;
- percent = y_percent * highx_float;
-#if 0
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
- } else {
- totals[k] += *(const GLushort*)temp_index * percent;
- }
- }
-#else
- (*extractPackedPixel)(isSwap,temp,extractTotals);
- for (k = 0; k < components; k++) {
- totals[k]+= extractTotals[k] * percent;
- }
-#endif
-
- /* calculate the value for pixels in the 1st and last column */
- for(m = lowy_int+1; m < highy_int; m++) {
- left += rowSizeInBytes;
- right += rowSizeInBytes;
-#if 0
- for (k = 0; k < components;
- k++, left += element_size, right += element_size) {
- if (myswap_bytes) {
- totals[k] +=
- __GLU_SWAP_2_BYTES(left) * (1-lowx_float) +
- __GLU_SWAP_2_BYTES(right) * highx_float;
- } else {
- totals[k] += *(const GLushort*)left * (1-lowx_float)
- + *(const GLushort*)right * highx_float;
- }
- }
-#else
- (*extractPackedPixel)(isSwap,left,extractTotals);
- (*extractPackedPixel)(isSwap,right,extractMoreTotals);
- for (k = 0; k < components; k++) {
- totals[k]+= (extractTotals[k]*(1-lowx_float) +
- extractMoreTotals[k]*highx_float);
- }
-#endif
- }
- } else if (highy_int > lowy_int) {
- x_percent = highx_float - lowx_float;
- percent = (1-lowy_float)*x_percent;
- temp = (const char *)dataIn + xindex + lowy_int*rowSizeInBytes;
-#if 0
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
- } else {
- totals[k] += *(const GLushort*)temp_index * percent;
- }
- }
-#else
- (*extractPackedPixel)(isSwap,temp,extractTotals);
- for (k = 0; k < components; k++) {
- totals[k]+= extractTotals[k] * percent;
- }
-#endif
- for(m = lowy_int+1; m < highy_int; m++) {
- temp += rowSizeInBytes;
-#if 0
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] +=
- __GLU_SWAP_2_BYTES(temp_index) * x_percent;
- } else {
- totals[k] += *(const GLushort*)temp_index * x_percent;
- }
- }
-#else
- (*extractPackedPixel)(isSwap,temp,extractTotals);
- for (k = 0; k < components; k++) {
- totals[k]+= extractTotals[k] * x_percent;
- }
-#endif
- }
- percent = x_percent * highy_float;
- temp += rowSizeInBytes;
-#if 0
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
- } else {
- totals[k] += *(const GLushort*)temp_index * percent;
- }
- }
-#else
- (*extractPackedPixel)(isSwap,temp,extractTotals);
- for (k = 0; k < components; k++) {
- totals[k]+= extractTotals[k] * percent;
- }
-#endif
- } else if (highx_int > lowx_int) {
- y_percent = highy_float - lowy_float;
- percent = (1-lowx_float)*y_percent;
- temp = (const char *)dataIn + xindex + lowy_int*rowSizeInBytes;
-#if 0
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
- } else {
- totals[k] += *(const GLushort*)temp_index * percent;
- }
- }
-#else
- (*extractPackedPixel)(isSwap,temp,extractTotals);
- for (k = 0; k < components; k++) {
- totals[k]+= extractTotals[k] * percent;
- }
-#endif
- for (l = lowx_int+1; l < highx_int; l++) {
- temp += pixelSizeInBytes;
-#if 0
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] +=
- __GLU_SWAP_2_BYTES(temp_index) * y_percent;
- } else {
- totals[k] += *(const GLushort*)temp_index * y_percent;
- }
- }
-#else
- (*extractPackedPixel)(isSwap,temp,extractTotals);
- for (k = 0; k < components; k++) {
- totals[k]+= extractTotals[k] * y_percent;
- }
-#endif
- }
- temp += pixelSizeInBytes;
- percent = y_percent * highx_float;
-#if 0
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
- } else {
- totals[k] += *(const GLushort*)temp_index * percent;
- }
- }
-#else
- (*extractPackedPixel)(isSwap,temp,extractTotals);
- for (k = 0; k < components; k++) {
- totals[k]+= extractTotals[k] * percent;
- }
-#endif
- } else {
- percent = (highy_float-lowy_float)*(highx_float-lowx_float);
- temp = (const char *)dataIn + xindex + lowy_int * rowSizeInBytes;
-#if 0
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] += __GLU_SWAP_2_BYTES(temp_index) * percent;
- } else {
- totals[k] += *(const GLushort*)temp_index * percent;
- }
- }
-#else
- (*extractPackedPixel)(isSwap,temp,extractTotals);
- for (k = 0; k < components; k++) {
- totals[k]+= extractTotals[k] * percent;
- }
-#endif
- }
-
- /* this is for the pixels in the body */
- temp0 = (const char *)dataIn + xindex + pixelSizeInBytes + (lowy_int+1)*rowSizeInBytes;
- for (m = lowy_int+1; m < highy_int; m++) {
- temp = temp0;
- for(l = lowx_int+1; l < highx_int; l++) {
-#if 0
- for (k = 0, temp_index = temp; k < components;
- k++, temp_index += element_size) {
- if (myswap_bytes) {
- totals[k] += __GLU_SWAP_2_BYTES(temp_index);
- } else {
- totals[k] += *(const GLushort*)temp_index;
- }
- }
-#else
- (*extractPackedPixel)(isSwap,temp,extractTotals);
- for (k = 0; k < components; k++) {
- totals[k]+= extractTotals[k];
- }
-#endif
- temp += pixelSizeInBytes;
- }
- temp0 += rowSizeInBytes;
- }
-
- outindex = (j + (i * widthOut)); /* * (components == 1) */
-#if 0
- for (k = 0; k < components; k++) {
- dataout[outindex + k] = totals[k]/area;
- /*printf("totals[%d] = %f\n", k, totals[k]);*/
- }
-#else
- for (k = 0; k < components; k++) {
- shoveTotals[k]= totals[k]/area;
- }
- (*shovePackedPixel)(shoveTotals,outindex,(void *)dataOut);
-#endif
- lowx_int = highx_int;
- lowx_float = highx_float;
- highx_int += convx_int;
- highx_float += convx_float;
- if(highx_float > 1) {
- highx_float -= 1.0;
- highx_int++;
- }
- }
- lowy_int = highy_int;
- lowy_float = highy_float;
- highy_int += convy_int;
- highy_float += convy_float;
- if(highy_float > 1) {
- highy_float -= 1.0;
- highy_int++;
- }
- }
-
- assert(outindex == (widthOut*heightOut - 1));
-} /* scaleInternalPackedPixel() */
-
-/* rowSizeInBytes is at least the width (in bytes) due to padding on
- * inputs; not always equal. Output NEVER has row padding.
- */
-static void halveImagePackedPixel(int components,
- void (*extractPackedPixel)
- (int, const void *,GLfloat []),
- void (*shovePackedPixel)
- (const GLfloat [],int, void *),
- GLint width, GLint height,
- const void *dataIn, void *dataOut,
- GLint pixelSizeInBytes,
- GLint rowSizeInBytes, GLint isSwap)
-{
- /* handle case where there is only 1 column/row */
- if (width == 1 || height == 1) {
- assert(!(width == 1 && height == 1)); /* can't be 1x1 */
- halve1DimagePackedPixel(components,extractPackedPixel,shovePackedPixel,
- width,height,dataIn,dataOut,pixelSizeInBytes,
- rowSizeInBytes,isSwap);
- return;
- }
-
- {
- int ii, jj;
-
- int halfWidth= width / 2;
- int halfHeight= height / 2;
- const char *src= (const char *) dataIn;
- int padBytes= rowSizeInBytes - (width*pixelSizeInBytes);
- int outIndex= 0;
-
- for (ii= 0; ii< halfHeight; ii++) {
- for (jj= 0; jj< halfWidth; jj++) {
-#define BOX4 4
- float totals[4]; /* 4 is maximum components */
- float extractTotals[BOX4][4]; /* 4 is maximum components */
- int cc;
-
- (*extractPackedPixel)(isSwap,src,
- &extractTotals[0][0]);
- (*extractPackedPixel)(isSwap,(src+pixelSizeInBytes),
- &extractTotals[1][0]);
- (*extractPackedPixel)(isSwap,(src+rowSizeInBytes),
- &extractTotals[2][0]);
- (*extractPackedPixel)(isSwap,
- (src+rowSizeInBytes+pixelSizeInBytes),
- &extractTotals[3][0]);
- for (cc = 0; cc < components; cc++) {
- int kk;
-
- /* grab 4 pixels to average */
- totals[cc]= 0.0;
- /* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED]+
- * extractTotals[2][RED]+extractTotals[3][RED];
- * totals[RED]/= 4.0;
- */
- for (kk = 0; kk < BOX4; kk++) {
- totals[cc]+= extractTotals[kk][cc];
- }
- totals[cc]/= (float)BOX4;
- }
- (*shovePackedPixel)(totals,outIndex,dataOut);
-
- outIndex++;
- /* skip over to next square of 4 */
- src+= pixelSizeInBytes + pixelSizeInBytes;
- }
- /* skip past pad bytes, if any, to get to next row */
- src+= padBytes;
-
- /* src is at beginning of a row here, but it's the second row of
- * the square block of 4 pixels that we just worked on so we
- * need to go one more row.
- * i.e.,
- * OO...
- * here -->OO...
- * but want -->OO...
- * OO...
- * ...
- */
- src+= rowSizeInBytes;
- }
-
- /* both pointers must reach one byte after the end */
- assert(src == &((const char *)dataIn)[rowSizeInBytes*height]);
- assert(outIndex == halfWidth * halfHeight);
- }
-} /* halveImagePackedPixel() */
-
-static void halve1DimagePackedPixel(int components,
- void (*extractPackedPixel)
- (int, const void *,GLfloat []),
- void (*shovePackedPixel)
- (const GLfloat [],int, void *),
- GLint width, GLint height,
- const void *dataIn, void *dataOut,
- GLint pixelSizeInBytes,
- GLint rowSizeInBytes, GLint isSwap)
-{
- int halfWidth= width / 2;
- int halfHeight= height / 2;
- const char *src= (const char *) dataIn;
- int jj;
-
- assert(width == 1 || height == 1); /* must be 1D */
- assert(width != height); /* can't be square */
-
- if (height == 1) { /* 1 row */
- int outIndex= 0;
-
- assert(width != 1); /* widthxheight can't be 1x1 */
- halfHeight= 1;
-
- /* one horizontal row with possible pad bytes */
-
- for (jj= 0; jj< halfWidth; jj++) {
-#define BOX2 2
- float totals[4]; /* 4 is maximum components */
- float extractTotals[BOX2][4]; /* 4 is maximum components */
- int cc;
-
- /* average two at a time, instead of four */
- (*extractPackedPixel)(isSwap,src,
- &extractTotals[0][0]);
- (*extractPackedPixel)(isSwap,(src+pixelSizeInBytes),
- &extractTotals[1][0]);
- for (cc = 0; cc < components; cc++) {
- int kk;
-
- /* grab 2 pixels to average */
- totals[cc]= 0.0;
- /* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED];
- * totals[RED]/= 2.0;
- */
- for (kk = 0; kk < BOX2; kk++) {
- totals[cc]+= extractTotals[kk][cc];
- }
- totals[cc]/= (float)BOX2;
- }
- (*shovePackedPixel)(totals,outIndex,dataOut);
-
- outIndex++;
- /* skip over to next group of 2 */
- src+= pixelSizeInBytes + pixelSizeInBytes;
- }
-
- {
- int padBytes= rowSizeInBytes - (width*pixelSizeInBytes);
- src+= padBytes; /* for assertion only */
- }
- assert(src == &((const char *)dataIn)[rowSizeInBytes]);
- assert(outIndex == halfWidth * halfHeight);
- }
- else if (width == 1) { /* 1 column */
- int outIndex= 0;
-
- assert(height != 1); /* widthxheight can't be 1x1 */
- halfWidth= 1;
- /* one vertical column with possible pad bytes per row */
- /* average two at a time */
-
- for (jj= 0; jj< halfHeight; jj++) {
-#define BOX2 2
- float totals[4]; /* 4 is maximum components */
- float extractTotals[BOX2][4]; /* 4 is maximum components */
- int cc;
-
- /* average two at a time, instead of four */
- (*extractPackedPixel)(isSwap,src,
- &extractTotals[0][0]);
- (*extractPackedPixel)(isSwap,(src+rowSizeInBytes),
- &extractTotals[1][0]);
- for (cc = 0; cc < components; cc++) {
- int kk;
-
- /* grab 2 pixels to average */
- totals[cc]= 0.0;
- /* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED];
- * totals[RED]/= 2.0;
- */
- for (kk = 0; kk < BOX2; kk++) {
- totals[cc]+= extractTotals[kk][cc];
- }
- totals[cc]/= (float)BOX2;
- }
- (*shovePackedPixel)(totals,outIndex,dataOut);
-
- outIndex++;
- src+= rowSizeInBytes + rowSizeInBytes; /* go to row after next */
- }
-
- assert(src == &((const char *)dataIn)[rowSizeInBytes*height]);
- assert(outIndex == halfWidth * halfHeight);
- }
-} /* halve1DimagePackedPixel() */
-
-/*===========================================================================*/
-
-#ifdef RESOLVE_3D_TEXTURE_SUPPORT
-/*
- * This section ensures that GLU 1.3 will load and run on
- * a GL 1.1 implementation. It dynamically resolves the
- * call to glTexImage3D() which might not be available.
- * Or is it might be supported as an extension.
- * Contributed by Gerk Huisma <gerk@five-d.demon.nl>.
- */
-
-typedef void (GLAPIENTRY *TexImage3Dproc)( GLenum target, GLint level,
- GLenum internalFormat,
- GLsizei width, GLsizei height,
- GLsizei depth, GLint border,
- GLenum format, GLenum type,
- const GLvoid *pixels );
-
-static TexImage3Dproc pTexImage3D = 0;
-
-#if !defined(_WIN32) && !defined(__WIN32__)
-# include <dlfcn.h>
-# include <sys/types.h>
-#else
- WINGDIAPI PROC WINAPI wglGetProcAddress(LPCSTR);
-#endif
-
-static void gluTexImage3D( GLenum target, GLint level,
- GLenum internalFormat,
- GLsizei width, GLsizei height,
- GLsizei depth, GLint border,
- GLenum format, GLenum type,
- const GLvoid *pixels )
-{
- if (!pTexImage3D) {
-#if defined(_WIN32) || defined(__WIN32__)
- pTexImage3D = (TexImage3Dproc) wglGetProcAddress("glTexImage3D");
- if (!pTexImage3D)
- pTexImage3D = (TexImage3Dproc) wglGetProcAddress("glTexImage3DEXT");
-#else
- void *libHandle = dlopen("libgl.so", RTLD_LAZY);
- pTexImage3D = (TexImage3Dproc) dlsym(libHandle, "glTexImage3D" );
- if (!pTexImage3D)
- pTexImage3D = (TexImage3Dproc) dlsym(libHandle,"glTexImage3DEXT");
- dlclose(libHandle);
-#endif
- }
-
- /* Now call glTexImage3D */
- if (pTexImage3D)
- pTexImage3D(target, level, internalFormat, width, height,
- depth, border, format, type, pixels);
-}
-
-#else
-
-/* Only bind to a GL 1.2 implementation: */
-#define gluTexImage3D glTexImage3D
-
-#endif
-
-static GLint imageSize3D(GLint width, GLint height, GLint depth,
- GLenum format, GLenum type)
-{
- int components= elements_per_group(format,type);
- int bytes_per_row= bytes_per_element(type) * width;
-
-assert(width > 0 && height > 0 && depth > 0);
-assert(type != GL_BITMAP);
-
- return bytes_per_row * height * depth * components;
-} /* imageSize3D() */
-
-static void fillImage3D(const PixelStorageModes *psm,
- GLint width, GLint height, GLint depth, GLenum format,
- GLenum type, GLboolean indexFormat,
- const void *userImage, GLushort *newImage)
-{
- int myswapBytes;
- int components;
- int groupsPerLine;
- int elementSize;
- int groupSize;
- int rowSize;
- int padding;
- int elementsPerLine;
- int rowsPerImage;
- int imageSize;
- const GLubyte *start, *rowStart, *iter;
- GLushort *iter2;
- int ww, hh, dd, k;
-
- myswapBytes= psm->unpack_swap_bytes;
- components= elements_per_group(format,type);
- if (psm->unpack_row_length > 0) {
- groupsPerLine= psm->unpack_row_length;
- }
- else {
- groupsPerLine= width;
- }
- elementSize= bytes_per_element(type);
- groupSize= elementSize * components;
- if (elementSize == 1) myswapBytes= 0;
-
- /* 3dstuff begin */
- if (psm->unpack_image_height > 0) {
- rowsPerImage= psm->unpack_image_height;
- }
- else {
- rowsPerImage= height;
- }
- /* 3dstuff end */
-
- rowSize= groupsPerLine * groupSize;
- padding= rowSize % psm->unpack_alignment;
- if (padding) {
- rowSize+= psm->unpack_alignment - padding;
- }
-
- imageSize= rowsPerImage * rowSize; /* 3dstuff */
-
- start= (const GLubyte *)userImage + psm->unpack_skip_rows * rowSize +
- psm->unpack_skip_pixels * groupSize +
- /*3dstuff*/
- psm->unpack_skip_images * imageSize;
- elementsPerLine = width * components;
-
- iter2= newImage;
- for (dd= 0; dd < depth; dd++) {
- rowStart= start;
-
- for (hh= 0; hh < height; hh++) {
- iter= rowStart;
-
- for (ww= 0; ww < elementsPerLine; ww++) {
- Type_Widget widget;
- float extractComponents[4];
-
- switch(type) {
- case GL_UNSIGNED_BYTE:
- if (indexFormat) {
- *iter2++ = *iter;
- } else {
- *iter2++ = (*iter) * 257;
- }
- break;
- case GL_BYTE:
- if (indexFormat) {
- *iter2++ = *((const GLbyte *) iter);
- } else {
- /* rough approx */
- *iter2++ = (*((const GLbyte *) iter)) * 516;
- }
- break;
- case GL_UNSIGNED_BYTE_3_3_2:
- extract332(0,iter,extractComponents);
- for (k = 0; k < 3; k++) {
- *iter2++ = (GLushort)(extractComponents[k]*65535);
- }
- break;
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- extract233rev(0,iter,extractComponents);
- for (k = 0; k < 3; k++) {
- *iter2++ = (GLushort)(extractComponents[k]*65535);
- }
- break;
- case GL_UNSIGNED_SHORT_5_6_5:
- extract565(myswapBytes,iter,extractComponents);
- for (k = 0; k < 3; k++) {
- *iter2++ = (GLushort)(extractComponents[k]*65535);
- }
- break;
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- extract565rev(myswapBytes,iter,extractComponents);
- for (k = 0; k < 3; k++) {
- *iter2++ = (GLushort)(extractComponents[k]*65535);
- }
- break;
- case GL_UNSIGNED_SHORT_4_4_4_4:
- extract4444(myswapBytes,iter,extractComponents);
- for (k = 0; k < 4; k++) {
- *iter2++ = (GLushort)(extractComponents[k]*65535);
- }
- break;
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- extract4444rev(myswapBytes,iter,extractComponents);
- for (k = 0; k < 4; k++) {
- *iter2++ = (GLushort)(extractComponents[k]*65535);
- }
- break;
- case GL_UNSIGNED_SHORT_5_5_5_1:
- extract5551(myswapBytes,iter,extractComponents);
- for (k = 0; k < 4; k++) {
- *iter2++ = (GLushort)(extractComponents[k]*65535);
- }
- break;
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- extract1555rev(myswapBytes,iter,extractComponents);
- for (k = 0; k < 4; k++) {
- *iter2++ = (GLushort)(extractComponents[k]*65535);
- }
- break;
- case GL_UNSIGNED_SHORT:
- case GL_SHORT:
- if (myswapBytes) {
- widget.ub[0] = iter[1];
- widget.ub[1] = iter[0];
- } else {
- widget.ub[0] = iter[0];
- widget.ub[1] = iter[1];
- }
- if (type == GL_SHORT) {
- if (indexFormat) {
- *iter2++ = widget.s[0];
- } else {
- /* rough approx */
- *iter2++ = widget.s[0]*2;
- }
- } else {
- *iter2++ = widget.us[0];
- }
- break;
- case GL_UNSIGNED_INT_8_8_8_8:
- extract8888(myswapBytes,iter,extractComponents);
- for (k = 0; k < 4; k++) {
- *iter2++ = (GLushort)(extractComponents[k]*65535);
- }
- break;
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- extract8888rev(myswapBytes,iter,extractComponents);
- for (k = 0; k < 4; k++) {
- *iter2++ = (GLushort)(extractComponents[k]*65535);
- }
- break;
- case GL_UNSIGNED_INT_10_10_10_2:
- extract1010102(myswapBytes,iter,extractComponents);
- for (k = 0; k < 4; k++) {
- *iter2++ = (GLushort)(extractComponents[k]*65535);
- }
- break;
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- extract2101010rev(myswapBytes,iter,extractComponents);
- for (k = 0; k < 4; k++) {
- *iter2++ = (GLushort)(extractComponents[k]*65535);
- }
- break;
- case GL_INT:
- case GL_UNSIGNED_INT:
- case GL_FLOAT:
- if (myswapBytes) {
- widget.ub[0] = iter[3];
- widget.ub[1] = iter[2];
- widget.ub[2] = iter[1];
- widget.ub[3] = iter[0];
- } else {
- widget.ub[0] = iter[0];
- widget.ub[1] = iter[1];
- widget.ub[2] = iter[2];
- widget.ub[3] = iter[3];
- }
- if (type == GL_FLOAT) {
- if (indexFormat) {
- *iter2++ = widget.f;
- } else {
- *iter2++ = 65535 * widget.f;
- }
- } else if (type == GL_UNSIGNED_INT) {
- if (indexFormat) {
- *iter2++ = widget.ui;
- } else {
- *iter2++ = widget.ui >> 16;
- }
- } else {
- if (indexFormat) {
- *iter2++ = widget.i;
- } else {
- *iter2++ = widget.i >> 15;
- }
- }
- break;
- default:
- assert(0);
- }
-
- iter+= elementSize;
- } /* for ww */
- rowStart+= rowSize;
-
- iter= rowStart; /* for assertion purposes */
- } /* for hh */
-
- start+= imageSize;
- } /* for dd */
-
- /* iterators should be one byte past end */
- if (!isTypePackedPixel(type)) {
- assert(iter2 == &newImage[width*height*depth*components]);
- }
- else {
- assert(iter2 == &newImage[width*height*depth*
- elements_per_group(format,0)]);
- }
- assert( iter == &((const GLubyte *)userImage)[rowSize*height*depth +
- psm->unpack_skip_rows * rowSize +
- psm->unpack_skip_pixels * groupSize +
- /*3dstuff*/
- psm->unpack_skip_images * imageSize] );
-} /* fillImage3D () */
-
-static void scaleInternal3D(GLint components,
- GLint widthIn, GLint heightIn, GLint depthIn,
- const GLushort *dataIn,
- GLint widthOut, GLint heightOut, GLint depthOut,
- GLushort *dataOut)
-{
- float x, lowx, highx, convx, halfconvx;
- float y, lowy, highy, convy, halfconvy;
- float z, lowz, highz, convz, halfconvz;
- float xpercent,ypercent,zpercent;
- float percent;
- /* Max components in a format is 4, so... */
- float totals[4];
- float volume;
- int i,j,d,k,zint,yint,xint,xindex,yindex,zindex;
- int temp;
-
- convz = (float) depthIn/depthOut;
- convy = (float) heightIn/heightOut;
- convx = (float) widthIn/widthOut;
- halfconvx = convx/2;
- halfconvy = convy/2;
- halfconvz = convz/2;
- for (d = 0; d < depthOut; d++) {
- z = convz * (d+0.5);
- if (depthIn > depthOut) {
- highz = z + halfconvz;
- lowz = z - halfconvz;
- } else {
- highz = z + 0.5;
- lowz = z - 0.5;
- }
- for (i = 0; i < heightOut; i++) {
- y = convy * (i+0.5);
- if (heightIn > heightOut) {
- highy = y + halfconvy;
- lowy = y - halfconvy;
- } else {
- highy = y + 0.5;
- lowy = y - 0.5;
- }
- for (j = 0; j < widthOut; j++) {
- x = convx * (j+0.5);
- if (widthIn > widthOut) {
- highx = x + halfconvx;
- lowx = x - halfconvx;
- } else {
- highx = x + 0.5;
- lowx = x - 0.5;
- }
-
- /*
- ** Ok, now apply box filter to box that goes from (lowx, lowy,
- ** lowz) to (highx, highy, highz) on input data into this pixel
- ** on output data.
- */
- totals[0] = totals[1] = totals[2] = totals[3] = 0.0;
- volume = 0.0;
-
- z = lowz;
- zint = floor(z);
- while (z < highz) {
- zindex = (zint + depthIn) % depthIn;
- if (highz < zint+1) {
- zpercent = highz - z;
- } else {
- zpercent = zint+1 - z;
- }
-
- y = lowy;
- yint = floor(y);
- while (y < highy) {
- yindex = (yint + heightIn) % heightIn;
- if (highy < yint+1) {
- ypercent = highy - y;
- } else {
- ypercent = yint+1 - y;
- }
-
- x = lowx;
- xint = floor(x);
-
- while (x < highx) {
- xindex = (xint + widthIn) % widthIn;
- if (highx < xint+1) {
- xpercent = highx - x;
- } else {
- xpercent = xint+1 - x;
- }
-
- percent = xpercent * ypercent * zpercent;
- volume += percent;
-
- temp = (xindex + (yindex*widthIn) +
- (zindex*widthIn*heightIn)) * components;
- for (k = 0; k < components; k++) {
- assert(0 <= (temp+k) &&
- (temp+k) <
- (widthIn*heightIn*depthIn*components));
- totals[k] += dataIn[temp + k] * percent;
- }
-
- xint++;
- x = xint;
- } /* while x */
-
- yint++;
- y = yint;
- } /* while y */
-
- zint++;
- z = zint;
- } /* while z */
-
- temp = (j + (i * widthOut) +
- (d*widthOut*heightOut)) * components;
- for (k = 0; k < components; k++) {
- /* totals[] should be rounded in the case of enlarging an
- * RGB ramp when the type is 332 or 4444
- */
- assert(0 <= (temp+k) &&
- (temp+k) < (widthOut*heightOut*depthOut*components));
- dataOut[temp + k] = (totals[k]+0.5)/volume;
- }
- } /* for j */
- } /* for i */
- } /* for d */
-} /* scaleInternal3D() */
-
-static void emptyImage3D(const PixelStorageModes *psm,
- GLint width, GLint height, GLint depth,
- GLenum format, GLenum type, GLboolean indexFormat,
- const GLushort *oldImage, void *userImage)
-{
- int myswapBytes;
- int components;
- int groupsPerLine;
- int elementSize;
- int groupSize;
- int rowSize;
- int padding;
- GLubyte *start, *rowStart, *iter;
- int elementsPerLine;
- const GLushort *iter2;
- int ii, jj, dd, k;
- int rowsPerImage;
- int imageSize;
-
- myswapBytes= psm->pack_swap_bytes;
- components = elements_per_group(format,type);
- if (psm->pack_row_length > 0) {
- groupsPerLine = psm->pack_row_length;
- }
- else {
- groupsPerLine = width;
- }
-
- elementSize= bytes_per_element(type);
- groupSize= elementSize * components;
- if (elementSize == 1) myswapBytes= 0;
-
- /* 3dstuff begin */
- if (psm->pack_image_height > 0) {
- rowsPerImage= psm->pack_image_height;
- }
- else {
- rowsPerImage= height;
- }
-
- /* 3dstuff end */
-
- rowSize = groupsPerLine * groupSize;
- padding = rowSize % psm->pack_alignment;
- if (padding) {
- rowSize+= psm->pack_alignment - padding;
- }
-
- imageSize= rowsPerImage * rowSize; /* 3dstuff */
-
- start = (GLubyte *)userImage + psm->pack_skip_rows * rowSize +
- psm->pack_skip_pixels * groupSize +
- /*3dstuff*/
- psm->pack_skip_images * imageSize;
- elementsPerLine= width * components;
-
- iter2 = oldImage;
- for (dd= 0; dd < depth; dd++) {
- rowStart= start;
-
- for (ii= 0; ii< height; ii++) {
- iter = rowStart;
-
- for (jj = 0; jj < elementsPerLine; jj++) {
- Type_Widget widget;
- float shoveComponents[4];
-
- switch(type){
- case GL_UNSIGNED_BYTE:
- if (indexFormat) {
- *iter = *iter2++;
- } else {
- *iter = *iter2++ >> 8;
- }
- break;
- case GL_BYTE:
- if (indexFormat) {
- *((GLbyte *) iter) = *iter2++;
- } else {
- *((GLbyte *) iter) = *iter2++ >> 9;
- }
- break;
- case GL_UNSIGNED_BYTE_3_3_2:
- for (k = 0; k < 3; k++) {
- shoveComponents[k]= *iter2++ / 65535.0;
- }
- shove332(shoveComponents,0,(void *)iter);
- break;
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- for (k = 0; k < 3; k++) {
- shoveComponents[k]= *iter2++ / 65535.0;
- }
- shove233rev(shoveComponents,0,(void *)iter);
- break;
- case GL_UNSIGNED_SHORT_5_6_5:
- for (k = 0; k < 3; k++) {
- shoveComponents[k]= *iter2++ / 65535.0;
- }
- shove565(shoveComponents,0,(void *)&widget.us[0]);
- if (myswapBytes) {
- iter[0] = widget.ub[1];
- iter[1] = widget.ub[0];
- }
- else {
- *(GLushort *)iter = widget.us[0];
- }
- break;
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- for (k = 0; k < 3; k++) {
- shoveComponents[k]= *iter2++ / 65535.0;
- }
- shove565rev(shoveComponents,0,(void *)&widget.us[0]);
- if (myswapBytes) {
- iter[0] = widget.ub[1];
- iter[1] = widget.ub[0];
- }
- else {
- *(GLushort *)iter = widget.us[0];
- }
- break;
- case GL_UNSIGNED_SHORT_4_4_4_4:
- for (k = 0; k < 4; k++) {
- shoveComponents[k]= *iter2++ / 65535.0;
- }
- shove4444(shoveComponents,0,(void *)&widget.us[0]);
- if (myswapBytes) {
- iter[0] = widget.ub[1];
- iter[1] = widget.ub[0];
- } else {
- *(GLushort *)iter = widget.us[0];
- }
- break;
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- for (k = 0; k < 4; k++) {
- shoveComponents[k]= *iter2++ / 65535.0;
- }
- shove4444rev(shoveComponents,0,(void *)&widget.us[0]);
- if (myswapBytes) {
- iter[0] = widget.ub[1];
- iter[1] = widget.ub[0];
- } else {
- *(GLushort *)iter = widget.us[0];
- }
- break;
- case GL_UNSIGNED_SHORT_5_5_5_1:
- for (k = 0; k < 4; k++) {
- shoveComponents[k]= *iter2++ / 65535.0;
- }
- shove5551(shoveComponents,0,(void *)&widget.us[0]);
- if (myswapBytes) {
- iter[0] = widget.ub[1];
- iter[1] = widget.ub[0];
- } else {
- *(GLushort *)iter = widget.us[0];
- }
- break;
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- for (k = 0; k < 4; k++) {
- shoveComponents[k]= *iter2++ / 65535.0;
- }
- shove1555rev(shoveComponents,0,(void *)&widget.us[0]);
- if (myswapBytes) {
- iter[0] = widget.ub[1];
- iter[1] = widget.ub[0];
- } else {
- *(GLushort *)iter = widget.us[0];
- }
- break;
- case GL_UNSIGNED_SHORT:
- case GL_SHORT:
- if (type == GL_SHORT) {
- if (indexFormat) {
- widget.s[0] = *iter2++;
- } else {
- widget.s[0] = *iter2++ >> 1;
- }
- } else {
- widget.us[0] = *iter2++;
- }
- if (myswapBytes) {
- iter[0] = widget.ub[1];
- iter[1] = widget.ub[0];
- } else {
- iter[0] = widget.ub[0];
- iter[1] = widget.ub[1];
- }
- break;
- case GL_UNSIGNED_INT_8_8_8_8:
- for (k = 0; k < 4; k++) {
- shoveComponents[k]= *iter2++ / 65535.0;
- }
- shove8888(shoveComponents,0,(void *)&widget.ui);
- if (myswapBytes) {
- iter[3] = widget.ub[0];
- iter[2] = widget.ub[1];
- iter[1] = widget.ub[2];
- iter[0] = widget.ub[3];
- } else {
- *(GLuint *)iter= widget.ui;
- }
- break;
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- for (k = 0; k < 4; k++) {
- shoveComponents[k]= *iter2++ / 65535.0;
- }
- shove8888rev(shoveComponents,0,(void *)&widget.ui);
- if (myswapBytes) {
- iter[3] = widget.ub[0];
- iter[2] = widget.ub[1];
- iter[1] = widget.ub[2];
- iter[0] = widget.ub[3];
- } else {
- *(GLuint *)iter= widget.ui;
- }
- break;
- case GL_UNSIGNED_INT_10_10_10_2:
- for (k = 0; k < 4; k++) {
- shoveComponents[k]= *iter2++ / 65535.0;
- }
- shove1010102(shoveComponents,0,(void *)&widget.ui);
- if (myswapBytes) {
- iter[3] = widget.ub[0];
- iter[2] = widget.ub[1];
- iter[1] = widget.ub[2];
- iter[0] = widget.ub[3];
- } else {
- *(GLuint *)iter= widget.ui;
- }
- break;
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- for (k = 0; k < 4; k++) {
- shoveComponents[k]= *iter2++ / 65535.0;
- }
- shove2101010rev(shoveComponents,0,(void *)&widget.ui);
- if (myswapBytes) {
- iter[3] = widget.ub[0];
- iter[2] = widget.ub[1];
- iter[1] = widget.ub[2];
- iter[0] = widget.ub[3];
- } else {
- *(GLuint *)iter= widget.ui;
- }
- break;
- case GL_INT:
- case GL_UNSIGNED_INT:
- case GL_FLOAT:
- if (type == GL_FLOAT) {
- if (indexFormat) {
- widget.f = *iter2++;
- } else {
- widget.f = *iter2++ / (float) 65535.0;
- }
- } else if (type == GL_UNSIGNED_INT) {
- if (indexFormat) {
- widget.ui = *iter2++;
- } else {
- widget.ui = (unsigned int) *iter2++ * 65537;
- }
- } else {
- if (indexFormat) {
- widget.i = *iter2++;
- } else {
- widget.i = ((unsigned int) *iter2++ * 65537)/2;
- }
- }
- if (myswapBytes) {
- iter[3] = widget.ub[0];
- iter[2] = widget.ub[1];
- iter[1] = widget.ub[2];
- iter[0] = widget.ub[3];
- } else {
- iter[0] = widget.ub[0];
- iter[1] = widget.ub[1];
- iter[2] = widget.ub[2];
- iter[3] = widget.ub[3];
- }
- break;
- default:
- assert(0);
- }
-
- iter+= elementSize;
- } /* for jj */
-
- rowStart+= rowSize;
- } /* for ii */
-
- start+= imageSize;
- } /* for dd */
-
- /* iterators should be one byte past end */
- if (!isTypePackedPixel(type)) {
- assert(iter2 == &oldImage[width*height*depth*components]);
- }
- else {
- assert(iter2 == &oldImage[width*height*depth*
- elements_per_group(format,0)]);
- }
- assert( iter == &((GLubyte *)userImage)[rowSize*height*depth +
- psm->unpack_skip_rows * rowSize +
- psm->unpack_skip_pixels * groupSize +
- /*3dstuff*/
- psm->unpack_skip_images * imageSize] );
-} /* emptyImage3D() */
-
-static
-int gluScaleImage3D(GLenum format,
- GLint widthIn, GLint heightIn, GLint depthIn,
- GLenum typeIn, const void *dataIn,
- GLint widthOut, GLint heightOut, GLint depthOut,
- GLenum typeOut, void *dataOut)
-{
- int components;
- GLushort *beforeImage, *afterImage;
- PixelStorageModes psm;
-
- if (widthIn == 0 || heightIn == 0 || depthIn == 0 ||
- widthOut == 0 || heightOut == 0 || depthOut == 0) {
- return 0;
- }
-
- if (widthIn < 0 || heightIn < 0 || depthIn < 0 ||
- widthOut < 0 || heightOut < 0 || depthOut < 0) {
- return GLU_INVALID_VALUE;
- }
-
- if (!legalFormat(format) || !legalType(typeIn) || !legalType(typeOut) ||
- typeIn == GL_BITMAP || typeOut == GL_BITMAP) {
- return GLU_INVALID_ENUM;
- }
- if (!isLegalFormatForPackedPixelType(format, typeIn)) {
- return GLU_INVALID_OPERATION;
- }
- if (!isLegalFormatForPackedPixelType(format, typeOut)) {
- return GLU_INVALID_OPERATION;
- }
-
- beforeImage = malloc(imageSize3D(widthIn, heightIn, depthIn, format,
- GL_UNSIGNED_SHORT));
- afterImage = malloc(imageSize3D(widthOut, heightOut, depthOut, format,
- GL_UNSIGNED_SHORT));
- if (beforeImage == NULL || afterImage == NULL) {
- free(beforeImage);
- free(afterImage);
- return GLU_OUT_OF_MEMORY;
- }
- retrieveStoreModes3D(&psm);
-
- fillImage3D(&psm,widthIn,heightIn,depthIn,format,typeIn, is_index(format),
- dataIn, beforeImage);
- components = elements_per_group(format,0);
- scaleInternal3D(components,widthIn,heightIn,depthIn,beforeImage,
- widthOut,heightOut,depthOut,afterImage);
- emptyImage3D(&psm,widthOut,heightOut,depthOut,format,typeOut,
- is_index(format),afterImage, dataOut);
- free((void *) beforeImage);
- free((void *) afterImage);
-
- return 0;
-} /* gluScaleImage3D() */
-
-
-static void closestFit3D(GLenum target, GLint width, GLint height, GLint depth,
- GLint internalFormat, GLenum format, GLenum type,
- GLint *newWidth, GLint *newHeight, GLint *newDepth)
-{
- GLint widthPowerOf2= nearestPower(width);
- GLint heightPowerOf2= nearestPower(height);
- GLint depthPowerOf2= nearestPower(depth);
- GLint proxyWidth;
-
- do {
- /* compute level 1 width & height & depth, clamping each at 1 */
- GLint widthAtLevelOne= (widthPowerOf2 > 1) ?
- widthPowerOf2 >> 1 :
- widthPowerOf2;
- GLint heightAtLevelOne= (heightPowerOf2 > 1) ?
- heightPowerOf2 >> 1 :
- heightPowerOf2;
- GLint depthAtLevelOne= (depthPowerOf2 > 1) ?
- depthPowerOf2 >> 1 :
- depthPowerOf2;
- GLenum proxyTarget = GL_PROXY_TEXTURE_3D;
- assert(widthAtLevelOne > 0);
- assert(heightAtLevelOne > 0);
- assert(depthAtLevelOne > 0);
-
- /* does width x height x depth at level 1 & all their mipmaps fit? */
- assert(target == GL_TEXTURE_3D || target == GL_PROXY_TEXTURE_3D);
- gluTexImage3D(proxyTarget, 1, /* must be non-zero */
- internalFormat,
- widthAtLevelOne,heightAtLevelOne,depthAtLevelOne,
- 0,format,type,NULL);
- glGetTexLevelParameteriv(proxyTarget, 1,GL_TEXTURE_WIDTH,&proxyWidth);
- /* does it fit??? */
- if (proxyWidth == 0) { /* nope, so try again with these sizes */
- if (widthPowerOf2 == 1 && heightPowerOf2 == 1 &&
- depthPowerOf2 == 1) {
- *newWidth= *newHeight= *newDepth= 1; /* must fit 1x1x1 texture */
- return;
- }
- widthPowerOf2= widthAtLevelOne;
- heightPowerOf2= heightAtLevelOne;
- depthPowerOf2= depthAtLevelOne;
- }
- /* else it does fit */
- } while (proxyWidth == 0);
- /* loop must terminate! */
-
- /* return the width & height at level 0 that fits */
- *newWidth= widthPowerOf2;
- *newHeight= heightPowerOf2;
- *newDepth= depthPowerOf2;
-/*printf("Proxy Textures\n");*/
-} /* closestFit3D() */
-
-static void halveImagePackedPixelSlice(int components,
- void (*extractPackedPixel)
- (int, const void *,GLfloat []),
- void (*shovePackedPixel)
- (const GLfloat [],int, void *),
- GLint width, GLint height, GLint depth,
- const void *dataIn, void *dataOut,
- GLint pixelSizeInBytes,
- GLint rowSizeInBytes,
- GLint imageSizeInBytes,
- GLint isSwap)
-{
- int ii, jj;
- int halfWidth= width / 2;
- int halfHeight= height / 2;
- int halfDepth= depth / 2;
- const char *src= (const char *)dataIn;
- int outIndex= 0;
-
- assert((width == 1 || height == 1) && depth >= 2);
-
- if (width == height) { /* a 1-pixel column viewed from top */
- assert(width == 1 && height == 1);
- assert(depth >= 2);
-
- for (ii= 0; ii< halfDepth; ii++) {
- float totals[4];
- float extractTotals[BOX2][4];
- int cc;
-
- (*extractPackedPixel)(isSwap,src,&extractTotals[0][0]);
- (*extractPackedPixel)(isSwap,(src+imageSizeInBytes),
- &extractTotals[1][0]);
- for (cc = 0; cc < components; cc++) {
- int kk;
-
- /* average 2 pixels since only a column */
- totals[cc]= 0.0;
- /* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED];
- * totals[RED]/= 2.0;
- */
- for (kk = 0; kk < BOX2; kk++) {
- totals[cc]+= extractTotals[kk][cc];
- }
- totals[cc]/= (float)BOX2;
- } /* for cc */
-
- (*shovePackedPixel)(totals,outIndex,dataOut);
- outIndex++;
- /* skip over to next group of 2 */
- src+= imageSizeInBytes + imageSizeInBytes;
- } /* for ii */
- }
- else if (height == 1) { /* horizontal slice viewed from top */
- assert(width != 1);
-
- for (ii= 0; ii< halfDepth; ii++) {
- for (jj= 0; jj< halfWidth; jj++) {
- float totals[4];
- float extractTotals[BOX4][4];
- int cc;
-
- (*extractPackedPixel)(isSwap,src,
- &extractTotals[0][0]);
- (*extractPackedPixel)(isSwap,(src+pixelSizeInBytes),
- &extractTotals[1][0]);
- (*extractPackedPixel)(isSwap,(src+imageSizeInBytes),
- &extractTotals[2][0]);
- (*extractPackedPixel)(isSwap,
- (src+imageSizeInBytes+pixelSizeInBytes),
- &extractTotals[3][0]);
- for (cc = 0; cc < components; cc++) {
- int kk;
-
- /* grab 4 pixels to average */
- totals[cc]= 0.0;
- /* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED]+
- * extractTotals[2][RED]+extractTotals[3][RED];
- * totals[RED]/= 4.0;
- */
- for (kk = 0; kk < BOX4; kk++) {
- totals[cc]+= extractTotals[kk][cc];
- }
- totals[cc]/= (float)BOX4;
- }
- (*shovePackedPixel)(totals,outIndex,dataOut);
-
- outIndex++;
- /* skip over to next horizontal square of 4 */
- src+= imageSizeInBytes + imageSizeInBytes;
- }
- }
-
- /* assert() */
- }
- else if (width == 1) { /* vertical slice viewed from top */
- assert(height != 1);
-
- for (ii= 0; ii< halfDepth; ii++) {
- for (jj= 0; jj< halfHeight; jj++) {
- float totals[4];
- float extractTotals[BOX4][4];
- int cc;
-
- (*extractPackedPixel)(isSwap,src,
- &extractTotals[0][0]);
- (*extractPackedPixel)(isSwap,(src+rowSizeInBytes),
- &extractTotals[1][0]);
- (*extractPackedPixel)(isSwap,(src+imageSizeInBytes),
- &extractTotals[2][0]);
- (*extractPackedPixel)(isSwap,
- (src+imageSizeInBytes+rowSizeInBytes),
- &extractTotals[3][0]);
- for (cc = 0; cc < components; cc++) {
- int kk;
-
- /* grab 4 pixels to average */
- totals[cc]= 0.0;
- /* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED]+
- * extractTotals[2][RED]+extractTotals[3][RED];
- * totals[RED]/= 4.0;
- */
- for (kk = 0; kk < BOX4; kk++) {
- totals[cc]+= extractTotals[kk][cc];
- }
- totals[cc]/= (float)BOX4;
- }
- (*shovePackedPixel)(totals,outIndex,dataOut);
-
- outIndex++;
-
- /* skip over to next vertical square of 4 */
- src+= imageSizeInBytes + imageSizeInBytes;
- }
- }
- /* assert() */
- }
-
-} /* halveImagePackedPixelSlice() */
-
-static void halveImagePackedPixel3D(int components,
- void (*extractPackedPixel)
- (int, const void *,GLfloat []),
- void (*shovePackedPixel)
- (const GLfloat [],int, void *),
- GLint width, GLint height, GLint depth,
- const void *dataIn, void *dataOut,
- GLint pixelSizeInBytes,
- GLint rowSizeInBytes,
- GLint imageSizeInBytes,
- GLint isSwap)
-{
- if (depth == 1) {
- assert(1 <= width && 1 <= height);
-
- halveImagePackedPixel(components,extractPackedPixel,shovePackedPixel,
- width,height,dataIn,dataOut,pixelSizeInBytes,
- rowSizeInBytes,isSwap);
- return;
- }
- /* a horizontal or vertical slice viewed from top */
- else if (width == 1 || height == 1) {
- assert(1 <= depth);
-
- halveImagePackedPixelSlice(components,
- extractPackedPixel,shovePackedPixel,
- width, height, depth, dataIn, dataOut,
- pixelSizeInBytes, rowSizeInBytes,
- imageSizeInBytes, isSwap);
- return;
- }
- {
- int ii, jj, dd;
-
- int halfWidth= width / 2;
- int halfHeight= height / 2;
- int halfDepth= depth / 2;
- const char *src= (const char *) dataIn;
- int padBytes= rowSizeInBytes - (width*pixelSizeInBytes);
- int outIndex= 0;
-
- for (dd= 0; dd < halfDepth; dd++) {
- for (ii= 0; ii< halfHeight; ii++) {
- for (jj= 0; jj< halfWidth; jj++) {
-#define BOX8 8
- float totals[4]; /* 4 is maximum components */
- float extractTotals[BOX8][4]; /* 4 is maximum components */
- int cc;
-
- (*extractPackedPixel)(isSwap,src,
- &extractTotals[0][0]);
- (*extractPackedPixel)(isSwap,(src+pixelSizeInBytes),
- &extractTotals[1][0]);
- (*extractPackedPixel)(isSwap,(src+rowSizeInBytes),
- &extractTotals[2][0]);
- (*extractPackedPixel)(isSwap,
- (src+rowSizeInBytes+pixelSizeInBytes),
- &extractTotals[3][0]);
-
- (*extractPackedPixel)(isSwap,(src+imageSizeInBytes),
- &extractTotals[4][0]);
- (*extractPackedPixel)(isSwap,(src+pixelSizeInBytes+imageSizeInBytes),
- &extractTotals[5][0]);
- (*extractPackedPixel)(isSwap,(src+rowSizeInBytes+imageSizeInBytes),
- &extractTotals[6][0]);
- (*extractPackedPixel)(isSwap,
- (src+rowSizeInBytes+pixelSizeInBytes+imageSizeInBytes),
- &extractTotals[7][0]);
- for (cc = 0; cc < components; cc++) {
- int kk;
-
- /* grab 8 pixels to average */
- totals[cc]= 0.0;
- /* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED]+
- * extractTotals[2][RED]+extractTotals[3][RED]+
- * extractTotals[4][RED]+extractTotals[5][RED]+
- * extractTotals[6][RED]+extractTotals[7][RED];
- * totals[RED]/= 8.0;
- */
- for (kk = 0; kk < BOX8; kk++) {
- totals[cc]+= extractTotals[kk][cc];
- }
- totals[cc]/= (float)BOX8;
- }
- (*shovePackedPixel)(totals,outIndex,dataOut);
-
- outIndex++;
- /* skip over to next square of 4 */
- src+= pixelSizeInBytes + pixelSizeInBytes;
- }
- /* skip past pad bytes, if any, to get to next row */
- src+= padBytes;
-
- /* src is at beginning of a row here, but it's the second row of
- * the square block of 4 pixels that we just worked on so we
- * need to go one more row.
- * i.e.,
- * OO...
- * here -->OO...
- * but want -->OO...
- * OO...
- * ...
- */
- src+= rowSizeInBytes;
- }
-
- src+= imageSizeInBytes;
- } /* for dd */
-
- /* both pointers must reach one byte after the end */
- assert(src == &((const char *)dataIn)[rowSizeInBytes*height*depth]);
- assert(outIndex == halfWidth * halfHeight * halfDepth);
- } /* for dd */
-
-} /* halveImagePackedPixel3D() */
-
-static int gluBuild3DMipmapLevelsCore(GLenum target, GLint internalFormat,
- GLsizei width,
- GLsizei height,
- GLsizei depth,
- GLsizei widthPowerOf2,
- GLsizei heightPowerOf2,
- GLsizei depthPowerOf2,
- GLenum format, GLenum type,
- GLint userLevel,
- GLint baseLevel,GLint maxLevel,
- const void *data)
-{
- GLint newWidth, newHeight, newDepth;
- GLint level, levels;
- const void *usersImage;
- void *srcImage, *dstImage;
- __GLU_INIT_SWAP_IMAGE;
- GLint memReq;
- GLint cmpts;
-
- GLint myswapBytes, groupsPerLine, elementSize, groupSize;
- GLint rowsPerImage, imageSize;
- GLint rowSize, padding;
- PixelStorageModes psm;
-
- assert(checkMipmapArgs(internalFormat,format,type) == 0);
- assert(width >= 1 && height >= 1 && depth >= 1);
- assert(type != GL_BITMAP);
-
- srcImage = dstImage = NULL;
-
- newWidth= widthPowerOf2;
- newHeight= heightPowerOf2;
- newDepth= depthPowerOf2;
- levels = computeLog(newWidth);
- level = computeLog(newHeight);
- if (level > levels) levels=level;
- level = computeLog(newDepth);
- if (level > levels) levels=level;
-
- levels+= userLevel;
-
- retrieveStoreModes3D(&psm);
- myswapBytes = psm.unpack_swap_bytes;
- cmpts = elements_per_group(format,type);
- if (psm.unpack_row_length > 0) {
- groupsPerLine = psm.unpack_row_length;
- } else {
- groupsPerLine = width;
- }
-
- elementSize = bytes_per_element(type);
- groupSize = elementSize * cmpts;
- if (elementSize == 1) myswapBytes = 0;
-
- /* 3dstuff begin */
- if (psm.unpack_image_height > 0) {
- rowsPerImage= psm.unpack_image_height;
- }
- else {
- rowsPerImage= height;
- }
-
- /* 3dstuff end */
- rowSize = groupsPerLine * groupSize;
- padding = (rowSize % psm.unpack_alignment);
- if (padding) {
- rowSize += psm.unpack_alignment - padding;
- }
-
- imageSize= rowsPerImage * rowSize; /* 3dstuff */
-
- usersImage = (const GLubyte *)data + psm.unpack_skip_rows * rowSize +
- psm.unpack_skip_pixels * groupSize +
- /* 3dstuff */
- psm.unpack_skip_images * imageSize;
-
- glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
- glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
- glPixelStorei(GL_UNPACK_SKIP_IMAGES, 0);
- glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, 0);
-
- level = userLevel;
-
- if (width == newWidth && height == newHeight && depth == newDepth) {
- /* Use usersImage for level userLevel */
- if (baseLevel <= level && level <= maxLevel) {
- gluTexImage3D(target, level, internalFormat, width,
- height, depth, 0, format, type,
- usersImage);
- }
- if(levels == 0) { /* we're done. clean up and return */
- glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
- glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
- glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
- glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
- glPixelStorei(GL_UNPACK_SKIP_IMAGES, psm.unpack_skip_images);
- glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, psm.unpack_image_height);
- return 0;
- }
- {
- int nextWidth= newWidth/2;
- int nextHeight= newHeight/2;
- int nextDepth= newDepth/2;
-
- /* clamp to 1 */
- if (nextWidth < 1) nextWidth= 1;
- if (nextHeight < 1) nextHeight= 1;
- if (nextDepth < 1) nextDepth= 1;
- memReq = imageSize3D(nextWidth, nextHeight, nextDepth, format, type);
- }
- switch(type) {
- case GL_UNSIGNED_BYTE:
- dstImage = (GLubyte *)malloc(memReq);
- break;
- case GL_BYTE:
- dstImage = (GLbyte *)malloc(memReq);
- break;
- case GL_UNSIGNED_SHORT:
- dstImage = (GLushort *)malloc(memReq);
- break;
- case GL_SHORT:
- dstImage = (GLshort *)malloc(memReq);
- break;
- case GL_UNSIGNED_INT:
- dstImage = (GLuint *)malloc(memReq);
- break;
- case GL_INT:
- dstImage = (GLint *)malloc(memReq);
- break;
- case GL_FLOAT:
- dstImage = (GLfloat *)malloc(memReq);
- break;
- case GL_UNSIGNED_BYTE_3_3_2:
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- dstImage = (GLubyte *)malloc(memReq);
- break;
- case GL_UNSIGNED_SHORT_5_6_5:
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- case GL_UNSIGNED_SHORT_4_4_4_4:
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- case GL_UNSIGNED_SHORT_5_5_5_1:
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- dstImage = (GLushort *)malloc(memReq);
- break;
- case GL_UNSIGNED_INT_8_8_8_8:
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- case GL_UNSIGNED_INT_10_10_10_2:
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- dstImage = (GLuint *)malloc(memReq);
- break;
- default:
- return GLU_INVALID_ENUM; /* assertion */
- }
- if (dstImage == NULL) {
- glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
- glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
- glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
- glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
- glPixelStorei(GL_UNPACK_SKIP_IMAGES, psm.unpack_skip_images);
- glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, psm.unpack_image_height);
- return GLU_OUT_OF_MEMORY;
- }
- else
- switch(type) {
- case GL_UNSIGNED_BYTE:
- if (depth > 1) {
- halveImage3D(cmpts,extractUbyte,shoveUbyte,
- width,height,depth,
- usersImage,dstImage,elementSize,groupSize,rowSize,
- imageSize,myswapBytes);
- }
- else {
- halveImage_ubyte(cmpts,width,height,usersImage,dstImage,
- elementSize,rowSize,groupSize);
- }
- break;
- case GL_BYTE:
- if (depth > 1) {
- halveImage3D(cmpts,extractSbyte,shoveSbyte,
- width,height,depth,
- usersImage,dstImage,elementSize,groupSize,rowSize,
- imageSize,myswapBytes);
- }
- else {
- halveImage_byte(cmpts,width,height,usersImage,dstImage,
- elementSize,rowSize,groupSize);
- }
- break;
- case GL_UNSIGNED_SHORT:
- if (depth > 1) {
- halveImage3D(cmpts,extractUshort,shoveUshort,
- width,height,depth,
- usersImage,dstImage,elementSize,groupSize,rowSize,
- imageSize,myswapBytes);
- }
- else {
- halveImage_ushort(cmpts,width,height,usersImage,dstImage,
- elementSize,rowSize,groupSize,myswapBytes);
- }
- break;
- case GL_SHORT:
- if (depth > 1) {
- halveImage3D(cmpts,extractSshort,shoveSshort,
- width,height,depth,
- usersImage,dstImage,elementSize,groupSize,rowSize,
- imageSize,myswapBytes);
- }
- else {
- halveImage_short(cmpts,width,height,usersImage,dstImage,
- elementSize,rowSize,groupSize,myswapBytes);
- }
- break;
- case GL_UNSIGNED_INT:
- if (depth > 1) {
- halveImage3D(cmpts,extractUint,shoveUint,
- width,height,depth,
- usersImage,dstImage,elementSize,groupSize,rowSize,
- imageSize,myswapBytes);
- }
- else {
- halveImage_uint(cmpts,width,height,usersImage,dstImage,
- elementSize,rowSize,groupSize,myswapBytes);
- }
- break;
- case GL_INT:
- if (depth > 1) {
- halveImage3D(cmpts,extractSint,shoveSint,
- width,height,depth,
- usersImage,dstImage,elementSize,groupSize,rowSize,
- imageSize,myswapBytes);
- }
- else {
- halveImage_int(cmpts,width,height,usersImage,dstImage,
- elementSize,rowSize,groupSize,myswapBytes);
- }
- break;
- case GL_FLOAT:
- if (depth > 1 ) {
- halveImage3D(cmpts,extractFloat,shoveFloat,
- width,height,depth,
- usersImage,dstImage,elementSize,groupSize,rowSize,
- imageSize,myswapBytes);
- }
- else {
- halveImage_float(cmpts,width,height,usersImage,dstImage,
- elementSize,rowSize,groupSize,myswapBytes);
- }
- break;
- case GL_UNSIGNED_BYTE_3_3_2:
- assert(format == GL_RGB);
- halveImagePackedPixel3D(3,extract332,shove332,
- width,height,depth,usersImage,dstImage,
- elementSize,rowSize,imageSize,myswapBytes);
- break;
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- assert(format == GL_RGB);
- halveImagePackedPixel3D(3,extract233rev,shove233rev,
- width,height,depth,usersImage,dstImage,
- elementSize,rowSize,imageSize,myswapBytes);
- break;
- case GL_UNSIGNED_SHORT_5_6_5:
- halveImagePackedPixel3D(3,extract565,shove565,
- width,height,depth,usersImage,dstImage,
- elementSize,rowSize,imageSize,myswapBytes);
- break;
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- halveImagePackedPixel3D(3,extract565rev,shove565rev,
- width,height,depth,usersImage,dstImage,
- elementSize,rowSize,imageSize,myswapBytes);
- break;
- case GL_UNSIGNED_SHORT_4_4_4_4:
- halveImagePackedPixel3D(4,extract4444,shove4444,
- width,height,depth,usersImage,dstImage,
- elementSize,rowSize,imageSize,myswapBytes);
- break;
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- halveImagePackedPixel3D(4,extract4444rev,shove4444rev,
- width,height,depth,usersImage,dstImage,
- elementSize,rowSize,imageSize,myswapBytes);
- break;
- case GL_UNSIGNED_SHORT_5_5_5_1:
- halveImagePackedPixel3D(4,extract5551,shove5551,
- width,height,depth,usersImage,dstImage,
- elementSize,rowSize,imageSize,myswapBytes);
- break;
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- halveImagePackedPixel3D(4,extract1555rev,shove1555rev,
- width,height,depth,usersImage,dstImage,
- elementSize,rowSize,imageSize,myswapBytes);
- break;
- case GL_UNSIGNED_INT_8_8_8_8:
- halveImagePackedPixel3D(4,extract8888,shove8888,
- width,height,depth,usersImage,dstImage,
- elementSize,rowSize,imageSize,myswapBytes);
- break;
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- halveImagePackedPixel3D(4,extract8888rev,shove8888rev,
- width,height,depth,usersImage,dstImage,
- elementSize,rowSize,imageSize,myswapBytes);
- break;
- case GL_UNSIGNED_INT_10_10_10_2:
- halveImagePackedPixel3D(4,extract1010102,shove1010102,
- width,height,depth,usersImage,dstImage,
- elementSize,rowSize,imageSize,myswapBytes);
- break;
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- halveImagePackedPixel3D(4,extract2101010rev,shove2101010rev,
- width,height,depth,usersImage,dstImage,
- elementSize,rowSize,imageSize,myswapBytes);
- break;
- default:
- assert(0);
- break;
- }
- newWidth = width/2;
- newHeight = height/2;
- newDepth = depth/2;
- /* clamp to 1 */
- if (newWidth < 1) newWidth= 1;
- if (newHeight < 1) newHeight= 1;
- if (newDepth < 1) newDepth= 1;
-
- myswapBytes = 0;
- rowSize = newWidth * groupSize;
- imageSize= rowSize * newHeight; /* 3dstuff */
- memReq = imageSize3D(newWidth, newHeight, newDepth, format, type);
- /* Swap srcImage and dstImage */
- __GLU_SWAP_IMAGE(srcImage,dstImage);
- switch(type) {
- case GL_UNSIGNED_BYTE:
- dstImage = (GLubyte *)malloc(memReq);
- break;
- case GL_BYTE:
- dstImage = (GLbyte *)malloc(memReq);
- break;
- case GL_UNSIGNED_SHORT:
- dstImage = (GLushort *)malloc(memReq);
- break;
- case GL_SHORT:
- dstImage = (GLshort *)malloc(memReq);
- break;
- case GL_UNSIGNED_INT:
- dstImage = (GLuint *)malloc(memReq);
- break;
- case GL_INT:
- dstImage = (GLint *)malloc(memReq);
- break;
- case GL_FLOAT:
- dstImage = (GLfloat *)malloc(memReq);
- break;
- case GL_UNSIGNED_BYTE_3_3_2:
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- dstImage = (GLubyte *)malloc(memReq);
- break;
- case GL_UNSIGNED_SHORT_5_6_5:
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- case GL_UNSIGNED_SHORT_4_4_4_4:
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- case GL_UNSIGNED_SHORT_5_5_5_1:
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- dstImage = (GLushort *)malloc(memReq);
- break;
- case GL_UNSIGNED_INT_8_8_8_8:
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- case GL_UNSIGNED_INT_10_10_10_2:
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- dstImage = (GLuint *)malloc(memReq);
- break;
- default:
- return GLU_INVALID_ENUM; /* assertion */
- }
- if (dstImage == NULL) {
- glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
- glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
- glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
- glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
- glPixelStorei(GL_UNPACK_SKIP_IMAGES, psm.unpack_skip_images);
- glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, psm.unpack_image_height);
- free(srcImage);
- return GLU_OUT_OF_MEMORY;
- }
- /* level userLevel+1 is in srcImage; level userLevel already saved */
- level = userLevel+1;
- } else {/* user's image is *not* nice power-of-2 sized square */
- memReq = imageSize3D(newWidth, newHeight, newDepth, format, type);
- switch(type) {
- case GL_UNSIGNED_BYTE:
- dstImage = (GLubyte *)malloc(memReq);
- break;
- case GL_BYTE:
- dstImage = (GLbyte *)malloc(memReq);
- break;
- case GL_UNSIGNED_SHORT:
- dstImage = (GLushort *)malloc(memReq);
- break;
- case GL_SHORT:
- dstImage = (GLshort *)malloc(memReq);
- break;
- case GL_UNSIGNED_INT:
- dstImage = (GLuint *)malloc(memReq);
- break;
- case GL_INT:
- dstImage = (GLint *)malloc(memReq);
- break;
- case GL_FLOAT:
- dstImage = (GLfloat *)malloc(memReq);
- break;
- case GL_UNSIGNED_BYTE_3_3_2:
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- dstImage = (GLubyte *)malloc(memReq);
- break;
- case GL_UNSIGNED_SHORT_5_6_5:
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- case GL_UNSIGNED_SHORT_4_4_4_4:
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- case GL_UNSIGNED_SHORT_5_5_5_1:
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- dstImage = (GLushort *)malloc(memReq);
- break;
- case GL_UNSIGNED_INT_8_8_8_8:
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- case GL_UNSIGNED_INT_10_10_10_2:
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- dstImage = (GLuint *)malloc(memReq);
- break;
- default:
- return GLU_INVALID_ENUM; /* assertion */
- }
-
- if (dstImage == NULL) {
- glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
- glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
- glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
- glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
- glPixelStorei(GL_UNPACK_SKIP_IMAGES, psm.unpack_skip_images);
- glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, psm.unpack_image_height);
- return GLU_OUT_OF_MEMORY;
- }
- /*printf("Build3DMipmaps(): ScaleImage3D %d %d %d->%d %d %d\n",
- width,height,depth,newWidth,newHeight,newDepth);*/
-
- gluScaleImage3D(format, width, height, depth, type, usersImage,
- newWidth, newHeight, newDepth, type, dstImage);
-
- myswapBytes = 0;
- rowSize = newWidth * groupSize;
- imageSize = rowSize * newHeight; /* 3dstuff */
- /* Swap dstImage and srcImage */
- __GLU_SWAP_IMAGE(srcImage,dstImage);
-
- if(levels != 0) { /* use as little memory as possible */
- {
- int nextWidth= newWidth/2;
- int nextHeight= newHeight/2;
- int nextDepth= newDepth/2;
- if (nextWidth < 1) nextWidth= 1;
- if (nextHeight < 1) nextHeight= 1;
- if (nextDepth < 1) nextDepth= 1;
-
- memReq = imageSize3D(nextWidth, nextHeight, nextDepth, format, type);
- }
- switch(type) {
- case GL_UNSIGNED_BYTE:
- dstImage = (GLubyte *)malloc(memReq);
- break;
- case GL_BYTE:
- dstImage = (GLbyte *)malloc(memReq);
- break;
- case GL_UNSIGNED_SHORT:
- dstImage = (GLushort *)malloc(memReq);
- break;
- case GL_SHORT:
- dstImage = (GLshort *)malloc(memReq);
- break;
- case GL_UNSIGNED_INT:
- dstImage = (GLuint *)malloc(memReq);
- break;
- case GL_INT:
- dstImage = (GLint *)malloc(memReq);
- break;
- case GL_FLOAT:
- dstImage = (GLfloat *)malloc(memReq);
- break;
- case GL_UNSIGNED_BYTE_3_3_2:
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- dstImage = (GLubyte *)malloc(memReq);
- break;
- case GL_UNSIGNED_SHORT_5_6_5:
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- case GL_UNSIGNED_SHORT_4_4_4_4:
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- case GL_UNSIGNED_SHORT_5_5_5_1:
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- dstImage = (GLushort *)malloc(memReq);
- break;
- case GL_UNSIGNED_INT_8_8_8_8:
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- case GL_UNSIGNED_INT_10_10_10_2:
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- dstImage = (GLuint *)malloc(memReq);
- break;
- default:
- return GLU_INVALID_ENUM; /* assertion */
- }
- if (dstImage == NULL) {
- glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
- glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
- glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
- glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
- glPixelStorei(GL_UNPACK_SKIP_IMAGES, psm.unpack_skip_images);
- glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, psm.unpack_image_height);
- free(srcImage);
- return GLU_OUT_OF_MEMORY;
- }
- }
- /* level userLevel is in srcImage; nothing saved yet */
- level = userLevel;
- }
-
- glPixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE);
- if (baseLevel <= level && level <= maxLevel) {
- gluTexImage3D(target, level, internalFormat, newWidth, newHeight, newDepth,
- 0,format, type, (void *)srcImage);
- }
- level++; /* update current level for the loop */
- for (; level <= levels; level++) {
- switch(type) {
- case GL_UNSIGNED_BYTE:
- if (newDepth > 1) {
- halveImage3D(cmpts,extractUbyte,shoveUbyte,
- newWidth,newHeight,newDepth,
- srcImage,dstImage,elementSize,groupSize,rowSize,
- imageSize,myswapBytes);
- }
- else {
- halveImage_ubyte(cmpts,newWidth,newHeight,srcImage,dstImage,
- elementSize,rowSize,groupSize);
- }
- break;
- case GL_BYTE:
- if (newDepth > 1) {
- halveImage3D(cmpts,extractSbyte,shoveSbyte,
- newWidth,newHeight,newDepth,
- srcImage,dstImage,elementSize,groupSize,rowSize,
- imageSize,myswapBytes);
- }
- else {
- halveImage_byte(cmpts,newWidth,newHeight,srcImage,dstImage,
- elementSize,rowSize,groupSize);
- }
- break;
- case GL_UNSIGNED_SHORT:
- if (newDepth > 1) {
- halveImage3D(cmpts,extractUshort,shoveUshort,
- newWidth,newHeight,newDepth,
- srcImage,dstImage,elementSize,groupSize,rowSize,
- imageSize,myswapBytes);
- }
- else {
- halveImage_ushort(cmpts,newWidth,newHeight,srcImage,dstImage,
- elementSize,rowSize,groupSize,myswapBytes);
- }
- break;
- case GL_SHORT:
- if (newDepth > 1) {
- halveImage3D(cmpts,extractSshort,shoveSshort,
- newWidth,newHeight,newDepth,
- srcImage,dstImage,elementSize,groupSize,rowSize,
- imageSize,myswapBytes);
- }
- else {
- halveImage_short(cmpts,newWidth,newHeight,srcImage,dstImage,
- elementSize,rowSize,groupSize,myswapBytes);
- }
- break;
- case GL_UNSIGNED_INT:
- if (newDepth > 1) {
- halveImage3D(cmpts,extractUint,shoveUint,
- newWidth,newHeight,newDepth,
- srcImage,dstImage,elementSize,groupSize,rowSize,
- imageSize,myswapBytes);
- }
- else {
- halveImage_uint(cmpts,newWidth,newHeight,srcImage,dstImage,
- elementSize,rowSize,groupSize,myswapBytes);
- }
- break;
- case GL_INT:
- if (newDepth > 1) {
- halveImage3D(cmpts,extractSint,shoveSint,
- newWidth,newHeight,newDepth,
- srcImage,dstImage,elementSize,groupSize,rowSize,
- imageSize,myswapBytes);
- }
- else {
- halveImage_int(cmpts,newWidth,newHeight,srcImage,dstImage,
- elementSize,rowSize,groupSize,myswapBytes);
- }
- break;
- case GL_FLOAT:
- if (newDepth > 1) {
- halveImage3D(cmpts,extractFloat,shoveFloat,
- newWidth,newHeight,newDepth,
- srcImage,dstImage,elementSize,groupSize,rowSize,
- imageSize,myswapBytes);
- }
- else {
- halveImage_float(cmpts,newWidth,newHeight,srcImage,dstImage,
- elementSize,rowSize,groupSize,myswapBytes);
- }
- break;
- case GL_UNSIGNED_BYTE_3_3_2:
- halveImagePackedPixel3D(3,extract332,shove332,
- newWidth,newHeight,newDepth,
- srcImage,dstImage,elementSize,rowSize,
- imageSize,myswapBytes);
- break;
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- halveImagePackedPixel3D(3,extract233rev,shove233rev,
- newWidth,newHeight,newDepth,
- srcImage,dstImage,elementSize,rowSize,
- imageSize,myswapBytes);
- break;
- case GL_UNSIGNED_SHORT_5_6_5:
- halveImagePackedPixel3D(3,extract565,shove565,
- newWidth,newHeight,newDepth,
- srcImage,dstImage,elementSize,rowSize,
- imageSize,myswapBytes);
- break;
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- halveImagePackedPixel3D(3,extract565rev,shove565rev,
- newWidth,newHeight,newDepth,
- srcImage,dstImage,elementSize,rowSize,
- imageSize,myswapBytes);
- break;
- case GL_UNSIGNED_SHORT_4_4_4_4:
- halveImagePackedPixel3D(4,extract4444,shove4444,
- newWidth,newHeight,newDepth,
- srcImage,dstImage,elementSize,rowSize,
- imageSize,myswapBytes);
- break;
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- halveImagePackedPixel3D(4,extract4444rev,shove4444rev,
- newWidth,newHeight,newDepth,
- srcImage,dstImage,elementSize,rowSize,
- imageSize,myswapBytes);
- break;
- case GL_UNSIGNED_SHORT_5_5_5_1:
- halveImagePackedPixel3D(4,extract5551,shove5551,
- newWidth,newHeight,newDepth,
- srcImage,dstImage,elementSize,rowSize,
- imageSize,myswapBytes);
- break;
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- halveImagePackedPixel3D(4,extract1555rev,shove1555rev,
- newWidth,newHeight,newDepth,
- srcImage,dstImage,elementSize,rowSize,
- imageSize,myswapBytes);
- break;
- case GL_UNSIGNED_INT_8_8_8_8:
- halveImagePackedPixel3D(4,extract8888,shove8888,
- newWidth,newHeight,newDepth,
- srcImage,dstImage,elementSize,rowSize,
- imageSize,myswapBytes);
- break;
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- halveImagePackedPixel3D(4,extract8888rev,shove8888rev,
- newWidth,newHeight,newDepth,
- srcImage,dstImage,elementSize,rowSize,
- imageSize,myswapBytes);
- break;
- case GL_UNSIGNED_INT_10_10_10_2:
- halveImagePackedPixel3D(4,extract1010102,shove1010102,
- newWidth,newHeight,newDepth,
- srcImage,dstImage,elementSize,rowSize,
- imageSize,myswapBytes);
- break;
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- halveImagePackedPixel3D(4,extract2101010rev,shove2101010rev,
- newWidth,newHeight,newDepth,
- srcImage,dstImage,elementSize,rowSize,
- imageSize,myswapBytes);
- break;
- default:
- assert(0);
- break;
- }
-
- __GLU_SWAP_IMAGE(srcImage,dstImage);
-
- if (newWidth > 1) { newWidth /= 2; rowSize /= 2;}
- if (newHeight > 1) { newHeight /= 2; imageSize = rowSize * newHeight; }
- if (newDepth > 1) newDepth /= 2;
- {
- /* call tex image with srcImage untouched since it's not padded */
- if (baseLevel <= level && level <= maxLevel) {
- gluTexImage3D(target, level, internalFormat, newWidth, newHeight,
- newDepth,0, format, type, (void *) srcImage);
- }
- }
- } /* for level */
- glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
- glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
- glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
- glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
- glPixelStorei(GL_UNPACK_SKIP_IMAGES, psm.unpack_skip_images);
- glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, psm.unpack_image_height);
-
- free(srcImage); /*if you get to here, a srcImage has always been malloc'ed*/
- if (dstImage) { /* if it's non-rectangular and only 1 level */
- free(dstImage);
- }
- return 0;
-} /* gluBuild3DMipmapLevelsCore() */
-
-GLint GLAPIENTRY
-gluBuild3DMipmapLevels(GLenum target, GLint internalFormat,
- GLsizei width, GLsizei height, GLsizei depth,
- GLenum format, GLenum type,
- GLint userLevel, GLint baseLevel, GLint maxLevel,
- const void *data)
-{
- int level, levels;
-
- int rc= checkMipmapArgs(internalFormat,format,type);
- if (rc != 0) return rc;
-
- if (width < 1 || height < 1 || depth < 1) {
- return GLU_INVALID_VALUE;
- }
-
- if(type == GL_BITMAP) {
- return GLU_INVALID_ENUM;
- }
-
- levels = computeLog(width);
- level = computeLog(height);
- if (level > levels) levels=level;
- level = computeLog(depth);
- if (level > levels) levels=level;
-
- levels+= userLevel;
- if (!isLegalLevels(userLevel,baseLevel,maxLevel,levels))
- return GLU_INVALID_VALUE;
-
- return gluBuild3DMipmapLevelsCore(target, internalFormat,
- width, height, depth,
- width, height, depth,
- format, type,
- userLevel, baseLevel, maxLevel,
- data);
-} /* gluBuild3DMipmapLevels() */
-
-GLint GLAPIENTRY
-gluBuild3DMipmaps(GLenum target, GLint internalFormat,
- GLsizei width, GLsizei height, GLsizei depth,
- GLenum format, GLenum type, const void *data)
-{
- GLint widthPowerOf2, heightPowerOf2, depthPowerOf2;
- int level, levels;
-
- int rc= checkMipmapArgs(internalFormat,format,type);
- if (rc != 0) return rc;
-
- if (width < 1 || height < 1 || depth < 1) {
- return GLU_INVALID_VALUE;
- }
-
- if(type == GL_BITMAP) {
- return GLU_INVALID_ENUM;
- }
-
- closestFit3D(target,width,height,depth,internalFormat,format,type,
- &widthPowerOf2,&heightPowerOf2,&depthPowerOf2);
-
- levels = computeLog(widthPowerOf2);
- level = computeLog(heightPowerOf2);
- if (level > levels) levels=level;
- level = computeLog(depthPowerOf2);
- if (level > levels) levels=level;
-
- return gluBuild3DMipmapLevelsCore(target, internalFormat,
- width, height, depth,
- widthPowerOf2, heightPowerOf2,
- depthPowerOf2,
- format, type, 0, 0, levels,
- data);
-} /* gluBuild3DMipmaps() */
-
-static GLdouble extractUbyte(int isSwap, const void *ubyte)
-{
- isSwap= isSwap; /* turn off warnings */
-
- assert(*((const GLubyte *)ubyte) <= 255);
-
- return (GLdouble)(*((const GLubyte *)ubyte));
-} /* extractUbyte() */
-
-static void shoveUbyte(GLdouble value, int index, void *data)
-{
- assert(0.0 <= value && value < 256.0);
-
- ((GLubyte *)data)[index]= (GLubyte)value;
-} /* shoveUbyte() */
-
-static GLdouble extractSbyte(int isSwap, const void *sbyte)
-{
- isSwap= isSwap; /* turn off warnings */
-
- assert(*((const GLbyte *)sbyte) <= 127);
-
- return (GLdouble)(*((const GLbyte *)sbyte));
-} /* extractSbyte() */
-
-static void shoveSbyte(GLdouble value, int index, void *data)
-{
- ((GLbyte *)data)[index]= (GLbyte)value;
-} /* shoveSbyte() */
-
-static GLdouble extractUshort(int isSwap, const void *uitem)
-{
- GLushort ushort;
-
- if (isSwap) {
- ushort= __GLU_SWAP_2_BYTES(uitem);
- }
- else {
- ushort= *(const GLushort *)uitem;
- }
-
- assert(ushort <= 65535);
-
- return (GLdouble)ushort;
-} /* extractUshort() */
-
-static void shoveUshort(GLdouble value, int index, void *data)
-{
- assert(0.0 <= value && value < 65536.0);
-
- ((GLushort *)data)[index]= (GLushort)value;
-} /* shoveUshort() */
-
-static GLdouble extractSshort(int isSwap, const void *sitem)
-{
- GLshort sshort;
-
- if (isSwap) {
- sshort= __GLU_SWAP_2_BYTES(sitem);
- }
- else {
- sshort= *(const GLshort *)sitem;
- }
-
- assert(sshort <= 32767);
-
- return (GLdouble)sshort;
-} /* extractSshort() */
-
-static void shoveSshort(GLdouble value, int index, void *data)
-{
- assert(0.0 <= value && value < 32768.0);
-
- ((GLshort *)data)[index]= (GLshort)value;
-} /* shoveSshort() */
-
-static GLdouble extractUint(int isSwap, const void *uitem)
-{
- GLuint uint;
-
- if (isSwap) {
- uint= __GLU_SWAP_4_BYTES(uitem);
- }
- else {
- uint= *(const GLuint *)uitem;
- }
-
- assert(uint <= 0xffffffff);
-
- return (GLdouble)uint;
-} /* extractUint() */
-
-static void shoveUint(GLdouble value, int index, void *data)
-{
- assert(0.0 <= value && value <= (GLdouble) UINT_MAX);
-
- ((GLuint *)data)[index]= (GLuint)value;
-} /* shoveUint() */
-
-static GLdouble extractSint(int isSwap, const void *sitem)
-{
- GLint sint;
-
- if (isSwap) {
- sint= __GLU_SWAP_4_BYTES(sitem);
- }
- else {
- sint= *(const GLint *)sitem;
- }
-
- assert(sint <= 0x7fffffff);
-
- return (GLdouble)sint;
-} /* extractSint() */
-
-static void shoveSint(GLdouble value, int index, void *data)
-{
- assert(0.0 <= value && value <= (GLdouble) INT_MAX);
-
- ((GLint *)data)[index]= (GLint)value;
-} /* shoveSint() */
-
-static GLdouble extractFloat(int isSwap, const void *item)
-{
- GLfloat ffloat;
-
- if (isSwap) {
- ffloat= __GLU_SWAP_4_BYTES(item);
- }
- else {
- ffloat= *(const GLfloat *)item;
- }
-
- assert(ffloat <= 1.0);
-
- return (GLdouble)ffloat;
-} /* extractFloat() */
-
-static void shoveFloat(GLdouble value, int index, void *data)
-{
- assert(0.0 <= value && value <= 1.0);
-
- ((GLfloat *)data)[index]= value;
-} /* shoveFloat() */
-
-static void halveImageSlice(int components,
- GLdouble (*extract)(int, const void *),
- void (*shove)(GLdouble, int, void *),
- GLint width, GLint height, GLint depth,
- const void *dataIn, void *dataOut,
- GLint elementSizeInBytes,
- GLint groupSizeInBytes,
- GLint rowSizeInBytes,
- GLint imageSizeInBytes,
- GLint isSwap)
-{
- int ii, jj;
- int halfWidth= width / 2;
- int halfHeight= height / 2;
- int halfDepth= depth / 2;
- const char *src= (const char *)dataIn;
- int rowPadBytes= rowSizeInBytes - (width * groupSizeInBytes);
- int imagePadBytes= imageSizeInBytes - (width*height*groupSizeInBytes);
- int outIndex= 0;
-
- assert((width == 1 || height == 1) && depth >= 2);
-
- if (width == height) { /* a 1-pixel column viewed from top */
- /* printf("1-column\n");*/
- assert(width == 1 && height == 1);
- assert(depth >= 2);
-
- for (ii= 0; ii< halfDepth; ii++) {
- int cc;
-
- for (cc = 0; cc < components; cc++) {
- double totals[4];
- double extractTotals[BOX2][4];
- int kk;
-
- extractTotals[0][cc]= (*extract)(isSwap,src);
- extractTotals[1][cc]= (*extract)(isSwap,(src+imageSizeInBytes));
-
- /* average 2 pixels since only a column */
- totals[cc]= 0.0;
- /* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED];
- * totals[RED]/= 2.0;
- */
- for (kk = 0; kk < BOX2; kk++) {
- totals[cc]+= extractTotals[kk][cc];
- }
- totals[cc]/= (double)BOX2;
-
- (*shove)(totals[cc],outIndex,dataOut);
- outIndex++;
- src+= elementSizeInBytes;
- } /* for cc */
-
- /* skip over to next group of 2 */
- src+= rowSizeInBytes;
- } /* for ii */
-
- assert(src == &((const char *)dataIn)[rowSizeInBytes*height*depth]);
- assert(outIndex == halfDepth * components);
- }
- else if (height == 1) { /* horizontal slice viewed from top */
- /* printf("horizontal slice\n"); */
- assert(width != 1);
-
- for (ii= 0; ii< halfDepth; ii++) {
- for (jj= 0; jj< halfWidth; jj++) {
- int cc;
-
- for (cc = 0; cc < components; cc++) {
- int kk;
- double totals[4];
- double extractTotals[BOX4][4];
-
- extractTotals[0][cc]=(*extract)(isSwap,src);
- extractTotals[1][cc]=(*extract)(isSwap,
- (src+groupSizeInBytes));
- extractTotals[2][cc]=(*extract)(isSwap,
- (src+imageSizeInBytes));
- extractTotals[3][cc]=(*extract)(isSwap,
- (src+imageSizeInBytes+groupSizeInBytes));
-
- /* grab 4 pixels to average */
- totals[cc]= 0.0;
- /* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED]+
- * extractTotals[2][RED]+extractTotals[3][RED];
- * totals[RED]/= 4.0;
- */
- for (kk = 0; kk < BOX4; kk++) {
- totals[cc]+= extractTotals[kk][cc];
- }
- totals[cc]/= (double)BOX4;
-
- (*shove)(totals[cc],outIndex,dataOut);
- outIndex++;
-
- src+= elementSizeInBytes;
- } /* for cc */
-
- /* skip over to next horizontal square of 4 */
- src+= groupSizeInBytes;
- } /* for jj */
- src+= rowPadBytes;
-
- src+= rowSizeInBytes;
- } /* for ii */
-
- assert(src == &((const char *)dataIn)[rowSizeInBytes*height*depth]);
- assert(outIndex == halfWidth * halfDepth * components);
- }
- else if (width == 1) { /* vertical slice viewed from top */
- /* printf("vertical slice\n"); */
- assert(height != 1);
-
- for (ii= 0; ii< halfDepth; ii++) {
- for (jj= 0; jj< halfHeight; jj++) {
- int cc;
-
- for (cc = 0; cc < components; cc++) {
- int kk;
- double totals[4];
- double extractTotals[BOX4][4];
-
- extractTotals[0][cc]=(*extract)(isSwap,src);
- extractTotals[1][cc]=(*extract)(isSwap,
- (src+rowSizeInBytes));
- extractTotals[2][cc]=(*extract)(isSwap,
- (src+imageSizeInBytes));
- extractTotals[3][cc]=(*extract)(isSwap,
- (src+imageSizeInBytes+rowSizeInBytes));
-
- /* grab 4 pixels to average */
- totals[cc]= 0.0;
- /* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED]+
- * extractTotals[2][RED]+extractTotals[3][RED];
- * totals[RED]/= 4.0;
- */
- for (kk = 0; kk < BOX4; kk++) {
- totals[cc]+= extractTotals[kk][cc];
- }
- totals[cc]/= (double)BOX4;
-
- (*shove)(totals[cc],outIndex,dataOut);
- outIndex++;
-
- src+= elementSizeInBytes;
- } /* for cc */
- src+= rowPadBytes;
-
- /* skip over to next vertical square of 4 */
- src+= rowSizeInBytes;
- } /* for jj */
- src+= imagePadBytes;
-
- src+= imageSizeInBytes;
- } /* for ii */
-
- assert(src == &((const char *)dataIn)[rowSizeInBytes*height*depth]);
- assert(outIndex == halfHeight * halfDepth * components);
- }
-
-} /* halveImageSlice() */
-
-static void halveImage3D(int components,
- GLdouble (*extract)(int, const void *),
- void (*shove)(GLdouble, int, void *),
- GLint width, GLint height, GLint depth,
- const void *dataIn, void *dataOut,
- GLint elementSizeInBytes,
- GLint groupSizeInBytes,
- GLint rowSizeInBytes,
- GLint imageSizeInBytes,
- GLint isSwap)
-{
- assert(depth > 1);
-
- /* a horizontal/vertical/one-column slice viewed from top */
- if (width == 1 || height == 1) {
- assert(1 <= depth);
-
- halveImageSlice(components,extract,shove, width, height, depth,
- dataIn, dataOut, elementSizeInBytes, groupSizeInBytes,
- rowSizeInBytes, imageSizeInBytes, isSwap);
- return;
- }
- {
- int ii, jj, dd;
-
- int halfWidth= width / 2;
- int halfHeight= height / 2;
- int halfDepth= depth / 2;
- const char *src= (const char *) dataIn;
- int rowPadBytes= rowSizeInBytes - (width*groupSizeInBytes);
- int imagePadBytes= imageSizeInBytes - (width*height*groupSizeInBytes);
- int outIndex= 0;
-
- for (dd= 0; dd < halfDepth; dd++) {
- for (ii= 0; ii< halfHeight; ii++) {
- for (jj= 0; jj< halfWidth; jj++) {
- int cc;
-
- for (cc= 0; cc < components; cc++) {
- int kk;
-#define BOX8 8
- double totals[4]; /* 4 is maximum components */
- double extractTotals[BOX8][4]; /* 4 is maximum components */
-
- extractTotals[0][cc]= (*extract)(isSwap,src);
- extractTotals[1][cc]= (*extract)(isSwap,
- (src+groupSizeInBytes));
- extractTotals[2][cc]= (*extract)(isSwap,
- (src+rowSizeInBytes));
- extractTotals[3][cc]= (*extract)(isSwap,
- (src+rowSizeInBytes+groupSizeInBytes));
-
- extractTotals[4][cc]= (*extract)(isSwap,
- (src+imageSizeInBytes));
-
- extractTotals[5][cc]= (*extract)(isSwap,
- (src+groupSizeInBytes+imageSizeInBytes));
- extractTotals[6][cc]= (*extract)(isSwap,
- (src+rowSizeInBytes+imageSizeInBytes));
- extractTotals[7][cc]= (*extract)(isSwap,
- (src+rowSizeInBytes+groupSizeInBytes+imageSizeInBytes));
-
- totals[cc]= 0.0;
-
- /* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED]+
- * extractTotals[2][RED]+extractTotals[3][RED]+
- * extractTotals[4][RED]+extractTotals[5][RED]+
- * extractTotals[6][RED]+extractTotals[7][RED];
- * totals[RED]/= 8.0;
- */
- for (kk = 0; kk < BOX8; kk++) {
- totals[cc]+= extractTotals[kk][cc];
- }
- totals[cc]/= (double)BOX8;
-
- (*shove)(totals[cc],outIndex,dataOut);
-
- outIndex++;
-
- src+= elementSizeInBytes; /* go to next component */
- } /* for cc */
-
- /* skip over to next square of 4 */
- src+= groupSizeInBytes;
- } /* for jj */
- /* skip past pad bytes, if any, to get to next row */
- src+= rowPadBytes;
-
- /* src is at beginning of a row here, but it's the second row of
- * the square block of 4 pixels that we just worked on so we
- * need to go one more row.
- * i.e.,
- * OO...
- * here -->OO...
- * but want -->OO...
- * OO...
- * ...
- */
- src+= rowSizeInBytes;
- } /* for ii */
-
- /* skip past pad bytes, if any, to get to next image */
- src+= imagePadBytes;
-
- src+= imageSizeInBytes;
- } /* for dd */
-
- /* both pointers must reach one byte after the end */
- assert(src == &((const char *)dataIn)[rowSizeInBytes*height*depth]);
- assert(outIndex == halfWidth * halfHeight * halfDepth * components);
- }
-} /* halveImage3D() */
-
-
-
-/*** mipmap.c ***/
-
projects / mesa.git / commitdiff