-/* $Id: image.c,v 1.52 2001/01/03 15:59:30 brianp Exp $ */
-
/*
* Mesa 3-D graphics library
- * Version: 3.5
+ * Version: 6.5.3
*
- * Copyright (C) 1999-2000 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2007 Brian Paul 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"),
*/
-#ifdef PC_HEADER
-#include "all.h"
-#else
+/**
+ * \file image.c
+ * Image handling.
+ */
+
+
#include "glheader.h"
#include "colormac.h"
#include "context.h"
#include "image.h"
+#include "imports.h"
#include "histogram.h"
#include "macros.h"
-#include "mem.h"
-#include "mmath.h"
#include "pixel.h"
-#include "mtypes.h"
-#endif
-
-/*
- * These are the image packing parameters for Mesa's internal images.
- * That is, _mesa_unpack_image() returns image data in this format.
- * When we execute image commands (glDrawPixels, glTexImage, etc)
- * from within display lists we have to be sure to set the current
- * unpacking params to these values!
+/**
+ * NOTE:
+ * Normally, BYTE_TO_FLOAT(0) returns 0.00392 That causes problems when
+ * we later convert the float to a packed integer value (such as for
+ * GL_RGB5_A1) because we'll wind up with a non-zero value.
+ *
+ * We redefine the macros here so zero is handled correctly.
*/
-const struct gl_pixelstore_attrib _mesa_native_packing = {
- 1, /* Alignment */
- 0, /* RowLength */
- 0, /* SkipPixels */
- 0, /* SkipRows */
- 0, /* ImageHeight */
- 0, /* SkipImages */
- GL_FALSE, /* SwapBytes */
- GL_FALSE /* LsbFirst */
-};
+#undef BYTE_TO_FLOAT
+#define BYTE_TO_FLOAT(B) ((B) == 0 ? 0.0F : ((2.0F * (B) + 1.0F) * (1.0F/255.0F)))
+#undef SHORT_TO_FLOAT
+#define SHORT_TO_FLOAT(S) ((S) == 0 ? 0.0F : ((2.0F * (S) + 1.0F) * (1.0F/65535.0F)))
-/*
+
+/** Compute ceiling of integer quotient of A divided by B. */
+#define CEILING( A, B ) ( (A) % (B) == 0 ? (A)/(B) : (A)/(B)+1 )
+
+
+/**
+ * \return GL_TRUE if type is packed pixel type, GL_FALSE otherwise.
+ */
+static GLboolean
+_mesa_type_is_packed(GLenum type)
+ {
+ switch (type) {
+ 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:
+ case GL_UNSIGNED_SHORT_8_8_MESA:
+ case GL_UNSIGNED_SHORT_8_8_REV_MESA:
+ case GL_UNSIGNED_INT_24_8_EXT:
+ return GL_TRUE;
+ }
+
+ return GL_FALSE;
+}
+
+/**
* Flip the 8 bits in each byte of the given array.
*
- * XXX try this trick to flip bytes someday:
+ * \param p array.
+ * \param n number of bytes.
+ *
+ * \todo try this trick to flip bytes someday:
+ * \code
* v = ((v & 0x55555555) << 1) | ((v >> 1) & 0x55555555);
* v = ((v & 0x33333333) << 2) | ((v >> 2) & 0x33333333);
* v = ((v & 0x0f0f0f0f) << 4) | ((v >> 4) & 0x0f0f0f0f);
+ * \endcode
*/
static void
flip_bytes( GLubyte *p, GLuint n )
}
-/*
+/**
* Flip the order of the 2 bytes in each word in the given array.
+ *
+ * \param p array.
+ * \param n number of words.
*/
void
_mesa_swap2( GLushort *p, GLuint n )
}
-
-
-/*
- * Return the size, in bytes, of the given GL datatype.
- * Return 0 if GL_BITMAP.
- * Return -1 if invalid type enum.
+/**
+ * Get the size of a GL data type.
+ *
+ * \param type GL data type.
+ *
+ * \return the size, in bytes, of the given data type, 0 if a GL_BITMAP, or -1
+ * if an invalid type enum.
*/
-GLint _mesa_sizeof_type( GLenum type )
+GLint
+_mesa_sizeof_type( GLenum type )
{
switch (type) {
case GL_BITMAP:
return sizeof(GLint);
case GL_FLOAT:
return sizeof(GLfloat);
+ case GL_HALF_FLOAT_ARB:
+ return sizeof(GLhalfARB);
default:
return -1;
}
}
-/*
- * Same as _mesa_sizeof_packed_type() but we also accept the
- * packed pixel format datatypes.
+/**
+ * Same as _mesa_sizeof_type() but also accepting the packed pixel
+ * format data types.
*/
-GLint _mesa_sizeof_packed_type( GLenum type )
+GLint
+_mesa_sizeof_packed_type( GLenum type )
{
switch (type) {
case GL_BITMAP:
return sizeof(GLuint);
case GL_INT:
return sizeof(GLint);
+ case GL_HALF_FLOAT_ARB:
+ return sizeof(GLhalfARB);
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:
- return sizeof(GLshort);
+ return sizeof(GLushort);
case GL_UNSIGNED_SHORT_5_6_5_REV:
- return sizeof(GLshort);
+ return sizeof(GLushort);
case GL_UNSIGNED_SHORT_4_4_4_4:
- return sizeof(GLshort);
+ return sizeof(GLushort);
case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- return sizeof(GLshort);
+ return sizeof(GLushort);
case GL_UNSIGNED_SHORT_5_5_5_1:
- return sizeof(GLshort);
+ return sizeof(GLushort);
case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- return sizeof(GLshort);
+ return sizeof(GLushort);
case GL_UNSIGNED_INT_8_8_8_8:
return sizeof(GLuint);
case GL_UNSIGNED_INT_8_8_8_8_REV:
return sizeof(GLuint);
case GL_UNSIGNED_INT_2_10_10_10_REV:
return sizeof(GLuint);
+ case GL_UNSIGNED_SHORT_8_8_MESA:
+ case GL_UNSIGNED_SHORT_8_8_REV_MESA:
+ return sizeof(GLushort);
+ case GL_UNSIGNED_INT_24_8_EXT:
+ return sizeof(GLuint);
default:
return -1;
}
}
-
-/*
- * Return the number of components in a GL enum pixel type.
- * Return -1 if bad format.
+/**
+ * Get the number of components in a pixel format.
+ *
+ * \param format pixel format.
+ *
+ * \return the number of components in the given format, or -1 if a bad format.
*/
-GLint _mesa_components_in_format( GLenum format )
+GLint
+_mesa_components_in_format( GLenum format )
{
switch (format) {
case GL_COLOR_INDEX:
return 4;
case GL_ABGR_EXT:
return 4;
+ case GL_YCBCR_MESA:
+ return 2;
+ case GL_DEPTH_STENCIL_EXT:
+ return 2;
default:
return -1;
}
}
-/*
- * Return bytes per pixel for given format and type
- * Return -1 if bad format or type.
+/**
+ * Get the bytes per pixel of pixel format type pair.
+ *
+ * \param format pixel format.
+ * \param type pixel type.
+ *
+ * \return bytes per pixel, or -1 if a bad format or type was given.
*/
-GLint _mesa_bytes_per_pixel( GLenum format, GLenum type )
+GLint
+_mesa_bytes_per_pixel( GLenum format, GLenum type )
{
GLint comps = _mesa_components_in_format( format );
if (comps < 0)
return comps * sizeof(GLint);
case GL_FLOAT:
return comps * sizeof(GLfloat);
+ case GL_HALF_FLOAT_ARB:
+ return comps * sizeof(GLhalfARB);
case GL_UNSIGNED_BYTE_3_3_2:
case GL_UNSIGNED_BYTE_2_3_3_REV:
if (format == GL_RGB || format == GL_BGR)
case GL_UNSIGNED_SHORT_5_6_5:
case GL_UNSIGNED_SHORT_5_6_5_REV:
if (format == GL_RGB || format == GL_BGR)
- return sizeof(GLshort);
+ return sizeof(GLushort);
else
return -1; /* error */
case GL_UNSIGNED_SHORT_4_4_4_4:
return sizeof(GLuint);
else
return -1;
+ case GL_UNSIGNED_SHORT_8_8_MESA:
+ case GL_UNSIGNED_SHORT_8_8_REV_MESA:
+ if (format == GL_YCBCR_MESA)
+ return sizeof(GLushort);
+ else
+ return -1;
+ case GL_UNSIGNED_INT_24_8_EXT:
+ if (format == GL_DEPTH_STENCIL_EXT)
+ return sizeof(GLuint);
+ else
+ return -1;
default:
return -1;
}
}
-/*
- * Test if the given pixel format and type are legal.
- * Return GL_TRUE for legal, GL_FALSE for illegal.
+/**
+ * Test for a legal pixel format and type.
+ *
+ * \param format pixel format.
+ * \param type pixel type.
+ *
+ * \return GL_TRUE if the given pixel format and type are legal, or GL_FALSE
+ * otherwise.
*/
GLboolean
-_mesa_is_legal_format_and_type( GLenum format, GLenum type )
+_mesa_is_legal_format_and_type( GLcontext *ctx, GLenum format, GLenum type )
{
switch (format) {
case GL_COLOR_INDEX:
case GL_UNSIGNED_INT:
case GL_FLOAT:
return GL_TRUE;
+ case GL_HALF_FLOAT_ARB:
+ return ctx->Extensions.ARB_half_float_pixel;
default:
return GL_FALSE;
}
case GL_GREEN:
case GL_BLUE:
case GL_ALPHA:
+#if 0 /* not legal! see table 3.6 of the 1.5 spec */
case GL_INTENSITY:
+#endif
case GL_LUMINANCE:
case GL_LUMINANCE_ALPHA:
case GL_DEPTH_COMPONENT:
case GL_UNSIGNED_INT:
case GL_FLOAT:
return GL_TRUE;
+ case GL_HALF_FLOAT_ARB:
+ return ctx->Extensions.ARB_half_float_pixel;
default:
return GL_FALSE;
}
case GL_RGB:
- case GL_BGR:
switch (type) {
case GL_BYTE:
case GL_UNSIGNED_BYTE:
case GL_UNSIGNED_SHORT_5_6_5:
case GL_UNSIGNED_SHORT_5_6_5_REV:
return GL_TRUE;
+ case GL_HALF_FLOAT_ARB:
+ return ctx->Extensions.ARB_half_float_pixel;
+ default:
+ return GL_FALSE;
+ }
+ case GL_BGR:
+ switch (type) {
+ /* NOTE: no packed types are supported with BGR. That's
+ * intentional, according to the GL spec.
+ */
+ case GL_BYTE:
+ case GL_UNSIGNED_BYTE:
+ case GL_SHORT:
+ case GL_UNSIGNED_SHORT:
+ case GL_INT:
+ case GL_UNSIGNED_INT:
+ case GL_FLOAT:
+ return GL_TRUE;
+ case GL_HALF_FLOAT_ARB:
+ return ctx->Extensions.ARB_half_float_pixel;
default:
return GL_FALSE;
}
case GL_UNSIGNED_INT_10_10_10_2:
case GL_UNSIGNED_INT_2_10_10_10_REV:
return GL_TRUE;
+ case GL_HALF_FLOAT_ARB:
+ return ctx->Extensions.ARB_half_float_pixel;
default:
return GL_FALSE;
}
+ case GL_YCBCR_MESA:
+ if (type == GL_UNSIGNED_SHORT_8_8_MESA ||
+ type == GL_UNSIGNED_SHORT_8_8_REV_MESA)
+ return GL_TRUE;
+ else
+ return GL_FALSE;
+ case GL_DEPTH_STENCIL_EXT:
+ if (ctx->Extensions.EXT_packed_depth_stencil
+ && type == GL_UNSIGNED_INT_24_8_EXT)
+ return GL_TRUE;
+ else
+ return GL_FALSE;
default:
; /* fall-through */
}
}
-
-/*
- * Return the address of a pixel in an image (actually a volume).
- * Pixel unpacking/packing parameters are observed according to 'packing'.
- * Input: image - start of image data
- * width, height - size of image
- * format - image format
- * type - pixel component type
- * packing - the pixelstore attributes
- * img - which image in the volume (0 for 1D or 2D images)
- * row, column - location of pixel in the image
- * Return: address of pixel at (image,row,column) in image or NULL if error.
+/**
+ * Return the address of a specific pixel in an image (1D, 2D or 3D).
+ *
+ * Pixel unpacking/packing parameters are observed according to \p packing.
+ *
+ * \param dimensions either 1, 2 or 3 to indicate dimensionality of image
+ * \param image starting address of image data
+ * \param width the image width
+ * \param height theimage height
+ * \param format the pixel format
+ * \param type the pixel data type
+ * \param packing the pixelstore attributes
+ * \param img which image in the volume (0 for 1D or 2D images)
+ * \param row row of pixel in the image (0 for 1D images)
+ * \param column column of pixel in the image
+ *
+ * \return address of pixel on success, or NULL on error.
+ *
+ * \sa gl_pixelstore_attrib.
*/
GLvoid *
-_mesa_image_address( const struct gl_pixelstore_attrib *packing,
- const GLvoid *image, GLsizei width,
- GLsizei height, GLenum format, GLenum type,
+_mesa_image_address( GLuint dimensions,
+ const struct gl_pixelstore_attrib *packing,
+ const GLvoid *image,
+ GLsizei width, GLsizei height,
+ GLenum format, GLenum type,
GLint img, GLint row, GLint column )
{
GLint alignment; /* 1, 2 or 4 */
GLint skipimages; /* for 3-D volume images */
GLubyte *pixel_addr;
+ ASSERT(dimensions >= 1 && dimensions <= 3);
+
alignment = packing->Alignment;
if (packing->RowLength > 0) {
pixels_per_row = packing->RowLength;
else {
rows_per_image = height;
}
- skiprows = packing->SkipRows;
+
skippixels = packing->SkipPixels;
- skipimages = packing->SkipImages;
+ /* Note: SKIP_ROWS _is_ used for 1D images */
+ skiprows = packing->SkipRows;
+ /* Note: SKIP_IMAGES is only used for 3D images */
+ skipimages = (dimensions == 3) ? packing->SkipImages : 0;
- if (type==GL_BITMAP) {
+ if (type == GL_BITMAP) {
/* BITMAP data */
GLint comp_per_pixel; /* components per pixel */
GLint bytes_per_comp; /* bytes per component */
/* Compute bytes per component */
bytes_per_comp = _mesa_sizeof_packed_type( type );
- if (bytes_per_comp<0) {
+ if (bytes_per_comp < 0) {
return NULL;
}
/* Compute number of components per pixel */
comp_per_pixel = _mesa_components_in_format( format );
- if (comp_per_pixel<0 && type != GL_BITMAP) {
+ if (comp_per_pixel < 0) {
return NULL;
}
else {
/* Non-BITMAP data */
GLint bytes_per_pixel, bytes_per_row, remainder, bytes_per_image;
+ GLint topOfImage;
bytes_per_pixel = _mesa_bytes_per_pixel( format, type );
bytes_per_image = bytes_per_row * rows_per_image;
+ if (packing->Invert) {
+ /* set pixel_addr to the last row */
+ topOfImage = bytes_per_row * (height - 1);
+ bytes_per_row = -bytes_per_row;
+ }
+ else {
+ topOfImage = 0;
+ }
+
/* compute final pixel address */
pixel_addr = (GLubyte *) image
+ (skipimages + img) * bytes_per_image
+ + topOfImage
+ (skiprows + row) * bytes_per_row
+ (skippixels + column) * bytes_per_pixel;
}
}
+GLvoid *
+_mesa_image_address1d( const struct gl_pixelstore_attrib *packing,
+ const GLvoid *image,
+ GLsizei width,
+ GLenum format, GLenum type,
+ GLint column )
+{
+ return _mesa_image_address(1, packing, image, width, 1,
+ format, type, 0, 0, column);
+}
-/*
- * Compute the stride between image rows (in bytes) for the given
- * pixel packing parameters and image width, format and type.
+
+GLvoid *
+_mesa_image_address2d( const struct gl_pixelstore_attrib *packing,
+ const GLvoid *image,
+ GLsizei width, GLsizei height,
+ GLenum format, GLenum type,
+ GLint row, GLint column )
+{
+ return _mesa_image_address(2, packing, image, width, height,
+ format, type, 0, row, column);
+}
+
+
+GLvoid *
+_mesa_image_address3d( const struct gl_pixelstore_attrib *packing,
+ const GLvoid *image,
+ GLsizei width, GLsizei height,
+ GLenum format, GLenum type,
+ GLint img, GLint row, GLint column )
+{
+ return _mesa_image_address(3, packing, image, width, height,
+ format, type, img, row, column);
+}
+
+
+
+/**
+ * Compute the stride (in bytes) between image rows.
+ *
+ * \param packing the pixelstore attributes
+ * \param width image width.
+ * \param format pixel format.
+ * \param type pixel data type.
+ *
+ * \return the stride in bytes for the given parameters, or -1 if error
*/
GLint
_mesa_image_row_stride( const struct gl_pixelstore_attrib *packing,
GLint width, GLenum format, GLenum type )
{
+ GLint bytesPerRow, remainder;
+
ASSERT(packing);
+
if (type == GL_BITMAP) {
- /* BITMAP data */
if (packing->RowLength == 0) {
- GLint bytes = (width + 7) / 8;
- return bytes;
+ bytesPerRow = (width + 7) / 8;
}
else {
- GLint bytes = (packing->RowLength + 7) / 8;
- return bytes;
+ bytesPerRow = (packing->RowLength + 7) / 8;
}
}
else {
/* Non-BITMAP data */
const GLint bytesPerPixel = _mesa_bytes_per_pixel(format, type);
- GLint bytesPerRow, remainder;
+ if (bytesPerPixel <= 0)
+ return -1; /* error */
+ if (packing->RowLength == 0) {
+ bytesPerRow = bytesPerPixel * width;
+ }
+ else {
+ bytesPerRow = bytesPerPixel * packing->RowLength;
+ }
+ }
+
+ remainder = bytesPerRow % packing->Alignment;
+ if (remainder > 0) {
+ bytesPerRow += (packing->Alignment - remainder);
+ }
+
+ if (packing->Invert) {
+ /* negate the bytes per row (negative row stride) */
+ bytesPerRow = -bytesPerRow;
+ }
+
+ return bytesPerRow;
+}
+
+
+#if _HAVE_FULL_GL
+
+/*
+ * Compute the stride between images in a 3D texture (in bytes) for the given
+ * pixel packing parameters and image width, format and type.
+ */
+GLint
+_mesa_image_image_stride( const struct gl_pixelstore_attrib *packing,
+ GLint width, GLint height,
+ GLenum format, GLenum type )
+{
+ ASSERT(packing);
+ ASSERT(type != GL_BITMAP);
+
+ {
+ const GLint bytesPerPixel = _mesa_bytes_per_pixel(format, type);
+ GLint bytesPerRow, bytesPerImage, remainder;
+
if (bytesPerPixel <= 0)
return -1; /* error */
if (packing->RowLength == 0) {
remainder = bytesPerRow % packing->Alignment;
if (remainder > 0)
bytesPerRow += (packing->Alignment - remainder);
- return bytesPerRow;
+
+ if (packing->ImageHeight == 0)
+ bytesPerImage = bytesPerRow * height;
+ else
+ bytesPerImage = bytesPerRow * packing->ImageHeight;
+
+ return bytesPerImage;
}
}
-
/*
* Unpack a 32x32 pixel polygon stipple from user memory using the
* current pixel unpack settings.
_mesa_unpack_polygon_stipple( const GLubyte *pattern, GLuint dest[32],
const struct gl_pixelstore_attrib *unpacking )
{
- GLubyte *ptrn = (GLubyte *) _mesa_unpack_bitmap( 32, 32, pattern, unpacking );
+ GLubyte *ptrn = (GLubyte *) _mesa_unpack_bitmap(32, 32, pattern, unpacking);
if (ptrn) {
/* Convert pattern from GLubytes to GLuints and handle big/little
* endian differences
| (p[3] );
p += 4;
}
- FREE(ptrn);
+ _mesa_free(ptrn);
}
}
-
/*
* Pack polygon stipple into user memory given current pixel packing
* settings.
/* Alloc dest storage */
bytes = ((width + 7) / 8 * height);
- buffer = (GLubyte *) MALLOC( bytes );
+ buffer = (GLubyte *) _mesa_malloc( bytes );
if (!buffer)
return NULL;
-
width_in_bytes = CEILING( width, 8 );
dst = buffer;
for (row = 0; row < height; row++) {
- GLubyte *src = _mesa_image_address( packing, pixels, width, height,
- GL_COLOR_INDEX, GL_BITMAP,
- 0, row, 0 );
+ const GLubyte *src = (const GLubyte *)
+ _mesa_image_address2d(packing, pixels, width, height,
+ GL_COLOR_INDEX, GL_BITMAP, row, 0);
if (!src) {
- FREE(buffer);
+ _mesa_free(buffer);
return NULL;
}
if (packing->SkipPixels == 0) {
- MEMCPY( dst, src, width_in_bytes );
+ _mesa_memcpy( dst, src, width_in_bytes );
if (packing->LsbFirst) {
flip_bytes( dst, width_in_bytes );
}
if (packing->LsbFirst) {
GLubyte srcMask = 1 << (packing->SkipPixels & 0x7);
GLubyte dstMask = 128;
- GLubyte *s = src;
+ const GLubyte *s = src;
GLubyte *d = dst;
*d = 0;
for (i = 0; i < width; i++) {
else {
GLubyte srcMask = 128 >> (packing->SkipPixels & 0x7);
GLubyte dstMask = 128;
- GLubyte *s = src;
+ const GLubyte *s = src;
GLubyte *d = dst;
*d = 0;
for (i = 0; i < width; i++) {
width_in_bytes = CEILING( width, 8 );
src = source;
for (row = 0; row < height; row++) {
- GLubyte *dst = _mesa_image_address( packing, dest, width, height,
- GL_COLOR_INDEX, GL_BITMAP,
- 0, row, 0 );
+ GLubyte *dst = (GLubyte *) _mesa_image_address2d(packing, dest,
+ width, height, GL_COLOR_INDEX, GL_BITMAP, row, 0);
if (!dst)
return;
if (packing->SkipPixels == 0) {
- MEMCPY( dst, src, width_in_bytes );
+ _mesa_memcpy( dst, src, width_in_bytes );
if (packing->LsbFirst) {
flip_bytes( dst, width_in_bytes );
}
}
-
+/**
+ * Apply various pixel transfer operations to an array of RGBA pixels
+ * as indicated by the transferOps bitmask
+ */
void
-_mesa_pack_float_rgba_span( GLcontext *ctx,
- GLuint n, CONST GLfloat rgbaIn[][4],
- GLenum dstFormat, GLenum dstType,
- GLvoid *dstAddr,
- const struct gl_pixelstore_attrib *dstPacking,
- GLuint transferOps )
+_mesa_apply_rgba_transfer_ops(GLcontext *ctx, GLbitfield transferOps,
+ GLuint n, GLfloat rgba[][4])
{
- const GLint comps = _mesa_components_in_format(dstFormat);
- GLfloat luminance[MAX_WIDTH];
- GLfloat (*rgba)[4];
+ /* scale & bias */
+ if (transferOps & IMAGE_SCALE_BIAS_BIT) {
+ _mesa_scale_and_bias_rgba(n, rgba,
+ ctx->Pixel.RedScale, ctx->Pixel.GreenScale,
+ ctx->Pixel.BlueScale, ctx->Pixel.AlphaScale,
+ ctx->Pixel.RedBias, ctx->Pixel.GreenBias,
+ ctx->Pixel.BlueBias, ctx->Pixel.AlphaBias);
+ }
+ /* color map lookup */
+ if (transferOps & IMAGE_MAP_COLOR_BIT) {
+ _mesa_map_rgba( ctx, n, rgba );
+ }
+ /* GL_COLOR_TABLE lookup */
+ if (transferOps & IMAGE_COLOR_TABLE_BIT) {
+ _mesa_lookup_rgba_float(&ctx->ColorTable[COLORTABLE_PRECONVOLUTION], n, rgba);
+ }
+ /* convolution */
+ if (transferOps & IMAGE_CONVOLUTION_BIT) {
+ /* this has to be done in the calling code */
+ _mesa_problem(ctx, "IMAGE_CONVOLUTION_BIT set in _mesa_apply_transfer_ops");
+ }
+ /* GL_POST_CONVOLUTION_RED/GREEN/BLUE/ALPHA_SCALE/BIAS */
+ if (transferOps & IMAGE_POST_CONVOLUTION_SCALE_BIAS) {
+ _mesa_scale_and_bias_rgba(n, rgba,
+ ctx->Pixel.PostConvolutionScale[RCOMP],
+ ctx->Pixel.PostConvolutionScale[GCOMP],
+ ctx->Pixel.PostConvolutionScale[BCOMP],
+ ctx->Pixel.PostConvolutionScale[ACOMP],
+ ctx->Pixel.PostConvolutionBias[RCOMP],
+ ctx->Pixel.PostConvolutionBias[GCOMP],
+ ctx->Pixel.PostConvolutionBias[BCOMP],
+ ctx->Pixel.PostConvolutionBias[ACOMP]);
+ }
+ /* GL_POST_CONVOLUTION_COLOR_TABLE lookup */
+ if (transferOps & IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT) {
+ _mesa_lookup_rgba_float(&ctx->ColorTable[COLORTABLE_POSTCONVOLUTION], n, rgba);
+ }
+ /* color matrix transform */
+ if (transferOps & IMAGE_COLOR_MATRIX_BIT) {
+ _mesa_transform_rgba(ctx, n, rgba);
+ }
+ /* GL_POST_COLOR_MATRIX_COLOR_TABLE lookup */
+ if (transferOps & IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT) {
+ _mesa_lookup_rgba_float(&ctx->ColorTable[COLORTABLE_POSTCOLORMATRIX], n, rgba);
+ }
+ /* update histogram count */
+ if (transferOps & IMAGE_HISTOGRAM_BIT) {
+ _mesa_update_histogram(ctx, n, (CONST GLfloat (*)[4]) rgba);
+ }
+ /* update min/max values */
+ if (transferOps & IMAGE_MIN_MAX_BIT) {
+ _mesa_update_minmax(ctx, n, (CONST GLfloat (*)[4]) rgba);
+ }
+ /* clamping to [0,1] */
+ if (transferOps & IMAGE_CLAMP_BIT) {
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ rgba[i][RCOMP] = CLAMP(rgba[i][RCOMP], 0.0F, 1.0F);
+ rgba[i][GCOMP] = CLAMP(rgba[i][GCOMP], 0.0F, 1.0F);
+ rgba[i][BCOMP] = CLAMP(rgba[i][BCOMP], 0.0F, 1.0F);
+ rgba[i][ACOMP] = CLAMP(rgba[i][ACOMP], 0.0F, 1.0F);
+ }
+ }
+}
+
+
+/*
+ * Apply color index shift and offset to an array of pixels.
+ */
+static void
+shift_and_offset_ci( const GLcontext *ctx, GLuint n, GLuint indexes[] )
+{
+ GLint shift = ctx->Pixel.IndexShift;
+ GLint offset = ctx->Pixel.IndexOffset;
GLuint i;
+ if (shift > 0) {
+ for (i=0;i<n;i++) {
+ indexes[i] = (indexes[i] << shift) + offset;
+ }
+ }
+ else if (shift < 0) {
+ shift = -shift;
+ for (i=0;i<n;i++) {
+ indexes[i] = (indexes[i] >> shift) + offset;
+ }
+ }
+ else {
+ for (i=0;i<n;i++) {
+ indexes[i] = indexes[i] + offset;
+ }
+ }
+}
- if (transferOps) {
- /* make copy of incoming data */
- GLfloat rgbaCopy[MAX_WIDTH][4];
+
+
+/**
+ * Apply color index shift, offset and table lookup to an array
+ * of color indexes;
+ */
+void
+_mesa_apply_ci_transfer_ops(const GLcontext *ctx, GLbitfield transferOps,
+ GLuint n, GLuint indexes[])
+{
+ if (transferOps & IMAGE_SHIFT_OFFSET_BIT) {
+ shift_and_offset_ci(ctx, n, indexes);
+ }
+ if (transferOps & IMAGE_MAP_COLOR_BIT) {
+ const GLuint mask = ctx->PixelMaps.ItoI.Size - 1;
+ GLuint i;
for (i = 0; i < n; i++) {
- rgbaCopy[i][0] = rgbaIn[i][0];
- rgbaCopy[i][1] = rgbaIn[i][1];
- rgbaCopy[i][2] = rgbaIn[i][2];
- rgbaCopy[i][3] = rgbaIn[i][3];
- }
-
- rgba = (GLfloat (*)[4]) rgbaCopy;
-
- /* scale & bias */
- if (transferOps & IMAGE_SCALE_BIAS_BIT) {
- _mesa_scale_and_bias_rgba(ctx, n, rgba,
- ctx->Pixel.RedScale, ctx->Pixel.GreenScale,
- ctx->Pixel.BlueScale, ctx->Pixel.AlphaScale,
- ctx->Pixel.RedBias, ctx->Pixel.GreenBias,
- ctx->Pixel.BlueBias, ctx->Pixel.AlphaBias);
- }
- /* color map lookup */
- if (transferOps & IMAGE_MAP_COLOR_BIT) {
- _mesa_map_rgba( ctx, n, rgba );
- }
- /* GL_COLOR_TABLE lookup */
- if (transferOps & IMAGE_COLOR_TABLE_BIT) {
- _mesa_lookup_rgba(&ctx->ColorTable, n, rgba);
- }
- /* convolution */
- if (transferOps & IMAGE_CONVOLUTION_BIT) {
- /* this has to be done in the calling code */
- }
- /* GL_POST_CONVOLUTION_RED/GREEN/BLUE/ALPHA_SCALE/BIAS */
- if (transferOps & IMAGE_POST_CONVOLUTION_SCALE_BIAS) {
- _mesa_scale_and_bias_rgba(ctx, n, rgba,
- ctx->Pixel.PostConvolutionScale[RCOMP],
- ctx->Pixel.PostConvolutionScale[GCOMP],
- ctx->Pixel.PostConvolutionScale[BCOMP],
- ctx->Pixel.PostConvolutionScale[ACOMP],
- ctx->Pixel.PostConvolutionBias[RCOMP],
- ctx->Pixel.PostConvolutionBias[GCOMP],
- ctx->Pixel.PostConvolutionBias[BCOMP],
- ctx->Pixel.PostConvolutionBias[ACOMP]);
- }
- /* GL_POST_CONVOLUTION_COLOR_TABLE lookup */
- if (transferOps & IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT) {
- _mesa_lookup_rgba(&ctx->PostConvolutionColorTable, n, rgba);
- }
- /* color matrix transform */
- if (transferOps & IMAGE_COLOR_MATRIX_BIT) {
- _mesa_transform_rgba(ctx, n, rgba);
- }
- /* GL_POST_COLOR_MATRIX_COLOR_TABLE lookup */
- if (transferOps & IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT) {
- _mesa_lookup_rgba(&ctx->PostColorMatrixColorTable, n, rgba);
- }
- /* update histogram count */
- if (transferOps & IMAGE_HISTOGRAM_BIT) {
- _mesa_update_histogram(ctx, n, (CONST GLfloat (*)[4]) rgba);
- }
- /* min/max here */
- if (transferOps & IMAGE_MIN_MAX_BIT) {
- _mesa_update_minmax(ctx, n, (CONST GLfloat (*)[4]) rgba);
- if (ctx->MinMax.Sink)
- return;
+ const GLuint j = indexes[i] & mask;
+ indexes[i] = IROUND(ctx->PixelMaps.ItoI.Map[j]);
}
}
- else {
- /* use incoming data, not a copy */
- rgba = (GLfloat (*)[4]) rgbaIn;
+}
+
+
+/**
+ * Apply stencil index shift, offset and table lookup to an array
+ * of stencil values.
+ */
+void
+_mesa_apply_stencil_transfer_ops(const GLcontext *ctx, GLuint n,
+ GLstencil stencil[])
+{
+ if (ctx->Pixel.IndexShift != 0 || ctx->Pixel.IndexOffset != 0) {
+ const GLint offset = ctx->Pixel.IndexOffset;
+ GLint shift = ctx->Pixel.IndexShift;
+ GLuint i;
+ if (shift > 0) {
+ for (i = 0; i < n; i++) {
+ stencil[i] = (stencil[i] << shift) + offset;
+ }
+ }
+ else if (shift < 0) {
+ shift = -shift;
+ for (i = 0; i < n; i++) {
+ stencil[i] = (stencil[i] >> shift) + offset;
+ }
+ }
+ else {
+ for (i = 0; i < n; i++) {
+ stencil[i] = stencil[i] + offset;
+ }
+ }
+ }
+ if (ctx->Pixel.MapStencilFlag) {
+ GLuint mask = ctx->PixelMaps.StoS.Size - 1;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ stencil[i] = ctx->PixelMaps.StoS.Map[ stencil[i] & mask ];
+ }
}
+}
+
- /* XXX clamp rgba to [0,1]? */
+/**
+ * Used to pack an array [][4] of RGBA float colors as specified
+ * by the dstFormat, dstType and dstPacking. Used by glReadPixels,
+ * glGetConvolutionFilter(), etc.
+ * Incoming colors will be clamped to [0,1] if needed.
+ * Note: the rgba values will be modified by this function when any pixel
+ * transfer ops are enabled.
+ */
+void
+_mesa_pack_rgba_span_float(GLcontext *ctx, GLuint n, GLfloat rgba[][4],
+ GLenum dstFormat, GLenum dstType,
+ GLvoid *dstAddr,
+ const struct gl_pixelstore_attrib *dstPacking,
+ GLbitfield transferOps)
+{
+ GLfloat luminance[MAX_WIDTH];
+ const GLint comps = _mesa_components_in_format(dstFormat);
+ GLuint i;
+
+ if (dstType != GL_FLOAT || ctx->Color.ClampReadColor == GL_TRUE) {
+ /* need to clamp to [0, 1] */
+ transferOps |= IMAGE_CLAMP_BIT;
+ }
+ if (transferOps) {
+ _mesa_apply_rgba_transfer_ops(ctx, transferOps, n, rgba);
+ if ((transferOps & IMAGE_MIN_MAX_BIT) && ctx->MinMax.Sink) {
+ return;
+ }
+ }
if (dstFormat == GL_LUMINANCE || dstFormat == GL_LUMINANCE_ALPHA) {
- for (i = 0; i < n; i++) {
- GLfloat sum = rgba[i][RCOMP] + rgba[i][GCOMP] + rgba[i][BCOMP];
- luminance[i] = CLAMP(sum, 0.0F, 1.0F);
+ /* compute luminance values */
+ if (transferOps & IMAGE_RED_TO_LUMINANCE) {
+ /* Luminance = Red (glGetTexImage) */
+ for (i = 0; i < n; i++) {
+ luminance[i] = rgba[i][RCOMP];
+ }
+ }
+ else {
+ /* Luminance = Red + Green + Blue (glReadPixels) */
+ if (dstType != GL_FLOAT || ctx->Color.ClampReadColor == GL_TRUE) {
+ for (i = 0; i < n; i++) {
+ GLfloat sum = rgba[i][RCOMP] + rgba[i][GCOMP] + rgba[i][BCOMP];
+ luminance[i] = CLAMP(sum, 0.0F, 1.0F);
+ }
+ }
+ else {
+ for (i = 0; i < n; i++) {
+ luminance[i] = rgba[i][RCOMP] + rgba[i][GCOMP] + rgba[i][BCOMP];
+ }
+ }
}
}
}
break;
default:
- gl_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
+ _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
}
}
break;
dst[i*4+2] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
dst[i*4+3] = FLOAT_TO_BYTE(rgba[i][ACOMP]);
}
+ break;
case GL_ABGR_EXT:
for (i=0;i<n;i++) {
dst[i*4+0] = FLOAT_TO_BYTE(rgba[i][ACOMP]);
}
break;
default:
- gl_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
+ _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
}
}
break;
switch (dstFormat) {
case GL_RED:
for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_USHORT(rgba[i][RCOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i], rgba[i][RCOMP]);
break;
case GL_GREEN:
for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_USHORT(rgba[i][GCOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i], rgba[i][GCOMP]);
break;
case GL_BLUE:
for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_USHORT(rgba[i][BCOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i], rgba[i][BCOMP]);
break;
case GL_ALPHA:
for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_USHORT(rgba[i][ACOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i], rgba[i][ACOMP]);
break;
case GL_LUMINANCE:
for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_USHORT(luminance[i]);
+ UNCLAMPED_FLOAT_TO_USHORT(dst[i], luminance[i]);
break;
case GL_LUMINANCE_ALPHA:
for (i=0;i<n;i++) {
- dst[i*2+0] = FLOAT_TO_USHORT(luminance[i]);
- dst[i*2+1] = FLOAT_TO_USHORT(rgba[i][ACOMP]);
+ UNCLAMPED_FLOAT_TO_USHORT(dst[i*2+0], luminance[i]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*2+1], rgba[i][ACOMP]);
}
break;
case GL_RGB:
for (i=0;i<n;i++) {
- dst[i*3+0] = FLOAT_TO_USHORT(rgba[i][RCOMP]);
- dst[i*3+1] = FLOAT_TO_USHORT(rgba[i][GCOMP]);
- dst[i*3+2] = FLOAT_TO_USHORT(rgba[i][BCOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*3+0], rgba[i][RCOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*3+1], rgba[i][GCOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*3+2], rgba[i][BCOMP]);
}
break;
case GL_RGBA:
for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_USHORT(rgba[i][RCOMP]);
- dst[i*4+1] = FLOAT_TO_USHORT(rgba[i][GCOMP]);
- dst[i*4+2] = FLOAT_TO_USHORT(rgba[i][BCOMP]);
- dst[i*4+3] = FLOAT_TO_USHORT(rgba[i][ACOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*4+0], rgba[i][RCOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*4+1], rgba[i][GCOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*4+2], rgba[i][BCOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*4+3], rgba[i][ACOMP]);
}
break;
case GL_BGR:
for (i=0;i<n;i++) {
- dst[i*3+0] = FLOAT_TO_USHORT(rgba[i][BCOMP]);
- dst[i*3+1] = FLOAT_TO_USHORT(rgba[i][GCOMP]);
- dst[i*3+2] = FLOAT_TO_USHORT(rgba[i][RCOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*3+0], rgba[i][BCOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*3+1], rgba[i][GCOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*3+2], rgba[i][RCOMP]);
}
break;
case GL_BGRA:
for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_USHORT(rgba[i][BCOMP]);
- dst[i*4+1] = FLOAT_TO_USHORT(rgba[i][GCOMP]);
- dst[i*4+2] = FLOAT_TO_USHORT(rgba[i][RCOMP]);
- dst[i*4+3] = FLOAT_TO_USHORT(rgba[i][ACOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*4+0], rgba[i][BCOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*4+1], rgba[i][GCOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*4+2], rgba[i][RCOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*4+3], rgba[i][ACOMP]);
}
break;
case GL_ABGR_EXT:
for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_USHORT(rgba[i][ACOMP]);
- dst[i*4+1] = FLOAT_TO_USHORT(rgba[i][BCOMP]);
- dst[i*4+2] = FLOAT_TO_USHORT(rgba[i][GCOMP]);
- dst[i*4+3] = FLOAT_TO_USHORT(rgba[i][RCOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*4+0], rgba[i][ACOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*4+1], rgba[i][BCOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*4+2], rgba[i][GCOMP]);
+ CLAMPED_FLOAT_TO_USHORT(dst[i*4+3], rgba[i][RCOMP]);
}
break;
default:
- gl_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
- }
- if (dstPacking->SwapBytes) {
- _mesa_swap2( (GLushort *) dst, n * comps);
+ _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
}
}
break;
dst[i*4+2] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
dst[i*4+3] = FLOAT_TO_SHORT(rgba[i][ACOMP]);
}
+ break;
case GL_ABGR_EXT:
for (i=0;i<n;i++) {
dst[i*4+0] = FLOAT_TO_SHORT(rgba[i][ACOMP]);
}
break;
default:
- gl_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
- }
- if (dstPacking->SwapBytes) {
- _mesa_swap2( (GLushort *) dst, n * comps );
+ _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
}
}
break;
}
break;
default:
- gl_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
- }
- if (dstPacking->SwapBytes) {
- _mesa_swap4( (GLuint *) dst, n * comps );
+ _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
}
}
break;
}
break;
default:
- gl_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
- }
- if (dstPacking->SwapBytes) {
- _mesa_swap4( (GLuint *) dst, n * comps );
+ _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
}
}
break;
}
break;
default:
- gl_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
- }
- if (dstPacking->SwapBytes) {
- _mesa_swap4( (GLuint *) dst, n * comps );
- }
- }
- break;
- case GL_UNSIGNED_BYTE_3_3_2:
- if (dstFormat == GL_RGB) {
- GLubyte *dst = (GLubyte *) dstAddr;
- for (i=0;i<n;i++) {
- dst[i] = (((GLint) (rgba[i][RCOMP] * 7.0F)) << 5)
- | (((GLint) (rgba[i][GCOMP] * 7.0F)) << 2)
- | (((GLint) (rgba[i][BCOMP] * 3.0F)) );
+ _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
}
}
break;
- case GL_UNSIGNED_BYTE_2_3_3_REV:
+ case GL_HALF_FLOAT_ARB:
+ {
+ GLhalfARB *dst = (GLhalfARB *) dstAddr;
+ switch (dstFormat) {
+ case GL_RED:
+ for (i=0;i<n;i++)
+ dst[i] = _mesa_float_to_half(rgba[i][RCOMP]);
+ break;
+ case GL_GREEN:
+ for (i=0;i<n;i++)
+ dst[i] = _mesa_float_to_half(rgba[i][GCOMP]);
+ break;
+ case GL_BLUE:
+ for (i=0;i<n;i++)
+ dst[i] = _mesa_float_to_half(rgba[i][BCOMP]);
+ break;
+ case GL_ALPHA:
+ for (i=0;i<n;i++)
+ dst[i] = _mesa_float_to_half(rgba[i][ACOMP]);
+ break;
+ case GL_LUMINANCE:
+ for (i=0;i<n;i++)
+ dst[i] = _mesa_float_to_half(luminance[i]);
+ break;
+ case GL_LUMINANCE_ALPHA:
+ for (i=0;i<n;i++) {
+ dst[i*2+0] = _mesa_float_to_half(luminance[i]);
+ dst[i*2+1] = _mesa_float_to_half(rgba[i][ACOMP]);
+ }
+ break;
+ case GL_RGB:
+ for (i=0;i<n;i++) {
+ dst[i*3+0] = _mesa_float_to_half(rgba[i][RCOMP]);
+ dst[i*3+1] = _mesa_float_to_half(rgba[i][GCOMP]);
+ dst[i*3+2] = _mesa_float_to_half(rgba[i][BCOMP]);
+ }
+ break;
+ case GL_RGBA:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = _mesa_float_to_half(rgba[i][RCOMP]);
+ dst[i*4+1] = _mesa_float_to_half(rgba[i][GCOMP]);
+ dst[i*4+2] = _mesa_float_to_half(rgba[i][BCOMP]);
+ dst[i*4+3] = _mesa_float_to_half(rgba[i][ACOMP]);
+ }
+ break;
+ case GL_BGR:
+ for (i=0;i<n;i++) {
+ dst[i*3+0] = _mesa_float_to_half(rgba[i][BCOMP]);
+ dst[i*3+1] = _mesa_float_to_half(rgba[i][GCOMP]);
+ dst[i*3+2] = _mesa_float_to_half(rgba[i][RCOMP]);
+ }
+ break;
+ case GL_BGRA:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = _mesa_float_to_half(rgba[i][BCOMP]);
+ dst[i*4+1] = _mesa_float_to_half(rgba[i][GCOMP]);
+ dst[i*4+2] = _mesa_float_to_half(rgba[i][RCOMP]);
+ dst[i*4+3] = _mesa_float_to_half(rgba[i][ACOMP]);
+ }
+ break;
+ case GL_ABGR_EXT:
+ for (i=0;i<n;i++) {
+ dst[i*4+0] = _mesa_float_to_half(rgba[i][ACOMP]);
+ dst[i*4+1] = _mesa_float_to_half(rgba[i][BCOMP]);
+ dst[i*4+2] = _mesa_float_to_half(rgba[i][GCOMP]);
+ dst[i*4+3] = _mesa_float_to_half(rgba[i][RCOMP]);
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
+ }
+ }
+ break;
+ case GL_UNSIGNED_BYTE_3_3_2:
+ if (dstFormat == GL_RGB) {
+ GLubyte *dst = (GLubyte *) dstAddr;
+ for (i=0;i<n;i++) {
+ dst[i] = (((GLint) (rgba[i][RCOMP] * 7.0F)) << 5)
+ | (((GLint) (rgba[i][GCOMP] * 7.0F)) << 2)
+ | (((GLint) (rgba[i][BCOMP] * 3.0F)) );
+ }
+ }
+ break;
+ case GL_UNSIGNED_BYTE_2_3_3_REV:
if (dstFormat == GL_RGB) {
GLubyte *dst = (GLubyte *) dstAddr;
for (i=0;i<n;i++) {
dst[i] = (((GLint) (rgba[i][RCOMP] * 7.0F)) )
| (((GLint) (rgba[i][GCOMP] * 7.0F)) << 3)
- | (((GLint) (rgba[i][BCOMP] * 3.0F)) << 5);
+ | (((GLint) (rgba[i][BCOMP] * 3.0F)) << 6);
}
}
break;
else if (dstFormat == GL_ABGR_EXT) {
GLushort *dst = (GLushort *) dstAddr;
for (i=0;i<n;i++) {
- dst[i] = (((GLint) (rgba[i][ACOMP] * 15.0F)) << 4)
+ dst[i] = (((GLint) (rgba[i][ACOMP] * 15.0F)) << 12)
| (((GLint) (rgba[i][BCOMP] * 15.0F)) << 8)
- | (((GLint) (rgba[i][GCOMP] * 15.0F)) << 12)
+ | (((GLint) (rgba[i][GCOMP] * 15.0F)) << 4)
| (((GLint) (rgba[i][RCOMP] * 15.0F)) );
}
}
}
break;
default:
- gl_problem(ctx, "bad type in _mesa_pack_float_rgba_span");
+ _mesa_problem(ctx, "bad type in _mesa_pack_rgba_span_float");
+ return;
}
-}
-
-
-
-/*
- * Pack the given RGBA span into client memory at 'dest' address
- * in the given pixel format and type.
- * Optionally apply the enabled pixel transfer ops.
- * Pack into memory using the given packing params struct.
- * This is used by glReadPixels and glGetTexImage?D()
- * Input: ctx - the context
- * n - number of pixels in the span
- * rgba - the pixels
- * format - dest packing format
- * type - dest packing datatype
- * destination - destination packing address
- * packing - pixel packing parameters
- * transferOps - bitmask of IMAGE_*_BIT operations to apply
- */
-void
-_mesa_pack_rgba_span( GLcontext *ctx,
- GLuint n, CONST GLchan srcRgba[][4],
- GLenum dstFormat, GLenum dstType,
- GLvoid *dstAddr,
- const struct gl_pixelstore_attrib *dstPacking,
- GLuint transferOps)
-{
- ASSERT((ctx->NewState & _NEW_PIXEL) == 0);
- /* Test for optimized case first */
- if (transferOps == 0 && dstFormat == GL_RGBA && dstType == CHAN_TYPE) {
- /* common simple case */
- MEMCPY(dstAddr, srcRgba, n * 4 * sizeof(GLchan));
- }
- else if (transferOps == 0 && dstFormat == GL_RGB && dstType == CHAN_TYPE) {
- /* common simple case */
- GLint i;
- GLchan *dest = (GLchan *) dstAddr;
- for (i = 0; i < n; i++) {
- dest[0] = srcRgba[i][RCOMP];
- dest[1] = srcRgba[i][GCOMP];
- dest[2] = srcRgba[i][BCOMP];
- dest += 3;
+ if (dstPacking->SwapBytes) {
+ GLint swapSize = _mesa_sizeof_packed_type(dstType);
+ if (swapSize == 2) {
+ if (dstPacking->SwapBytes) {
+ _mesa_swap2((GLushort *) dstAddr, n * comps);
+ }
}
- }
- else {
- /* general solution */
- GLfloat rgba[MAX_WIDTH][4];
- GLuint i;
- assert(n <= MAX_WIDTH);
- /* convert color components to floating point */
- for (i=0;i<n;i++) {
- rgba[i][RCOMP] = CHAN_TO_FLOAT(srcRgba[i][RCOMP]);
- rgba[i][GCOMP] = CHAN_TO_FLOAT(srcRgba[i][GCOMP]);
- rgba[i][BCOMP] = CHAN_TO_FLOAT(srcRgba[i][BCOMP]);
- rgba[i][ACOMP] = CHAN_TO_FLOAT(srcRgba[i][ACOMP]);
+ else if (swapSize == 4) {
+ if (dstPacking->SwapBytes) {
+ _mesa_swap4((GLuint *) dstAddr, n * comps);
+ }
}
- _mesa_pack_float_rgba_span(ctx, n, (const GLfloat (*)[4]) rgba,
- dstFormat, dstType, dstAddr,
- dstPacking, transferOps);
}
}
GLenum srcFormat, GLenum srcType, const GLvoid *src,
const struct gl_pixelstore_attrib *unpack )
{
- assert(srcFormat == GL_COLOR_INDEX);
+ ASSERT(srcFormat == GL_COLOR_INDEX || srcFormat == GL_STENCIL_INDEX);
ASSERT(srcType == GL_BITMAP ||
srcType == GL_UNSIGNED_BYTE ||
srcType == GL_SHORT ||
srcType == GL_UNSIGNED_INT ||
srcType == GL_INT ||
+ srcType == GL_UNSIGNED_INT_24_8_EXT ||
+ srcType == GL_HALF_FLOAT_ARB ||
srcType == GL_FLOAT);
switch (srcType) {
}
}
break;
+ case GL_HALF_FLOAT_ARB:
+ {
+ GLuint i;
+ const GLhalfARB *s = (const GLhalfARB *) src;
+ if (unpack->SwapBytes) {
+ for (i = 0; i < n; i++) {
+ GLhalfARB value = s[i];
+ SWAP2BYTE(value);
+ indexes[i] = (GLuint) _mesa_half_to_float(value);
+ }
+ }
+ else {
+ for (i = 0; i < n; i++)
+ indexes[i] = (GLuint) _mesa_half_to_float(s[i]);
+ }
+ }
+ break;
+ case GL_UNSIGNED_INT_24_8_EXT:
+ {
+ GLuint i;
+ const GLuint *s = (const GLuint *) src;
+ if (unpack->SwapBytes) {
+ for (i = 0; i < n; i++) {
+ GLuint value = s[i];
+ SWAP4BYTE(value);
+ indexes[i] = value & 0xff; /* lower 8 bits */
+ }
+ }
+ else {
+ for (i = 0; i < n; i++)
+ indexes[i] = s[i] & 0xfff; /* lower 8 bits */
+ }
+ }
+ break;
+
default:
- gl_problem(NULL, "bad srcType in extract_uint_indexes");
+ _mesa_problem(NULL, "bad srcType in extract_uint_indexes");
return;
}
}
-
/*
* This function extracts floating point RGBA values from arbitrary
* image data. srcFormat and srcType are the format and type parameters
* Args: n - number of pixels
* rgba - output colors
* srcFormat - format of incoming data
- * srcType - datatype of incoming data
+ * srcType - data type of incoming data
* src - source data pointer
* swapBytes - perform byteswapping of incoming data?
*/
srcType == GL_SHORT ||
srcType == GL_UNSIGNED_INT ||
srcType == GL_INT ||
+ srcType == GL_HALF_FLOAT_ARB ||
srcType == GL_FLOAT ||
srcType == GL_UNSIGNED_BYTE_3_3_2 ||
srcType == GL_UNSIGNED_BYTE_2_3_3_REV ||
stride = 2;
break;
case GL_INTENSITY:
- redIndex = 0;
- greenIndex = blueIndex = alphaIndex = -1;
+ redIndex = greenIndex = blueIndex = alphaIndex = 0;
stride = 1;
break;
case GL_RGB:
greenIndex = 1;
blueIndex = 2;
alphaIndex = -1;
+ rComp = 0;
+ gComp = 1;
+ bComp = 2;
+ aComp = 3;
stride = 3;
break;
case GL_BGR:
greenIndex = 1;
blueIndex = 0;
alphaIndex = -1;
+ rComp = 2;
+ gComp = 1;
+ bComp = 0;
+ aComp = 3;
stride = 3;
break;
case GL_RGBA:
stride = 4;
break;
default:
- gl_problem(NULL, "bad srcFormat in extract float data");
+ _mesa_problem(NULL, "bad srcFormat in extract float data");
return;
}
PROCESS(blueIndex, BCOMP, 0.0F, GLfloat, (GLfloat));
PROCESS(alphaIndex, ACOMP, 1.0F, GLfloat, (GLfloat));
break;
+ case GL_HALF_FLOAT_ARB:
+ PROCESS(redIndex, RCOMP, 0.0F, GLhalfARB, _mesa_half_to_float);
+ PROCESS(greenIndex, GCOMP, 0.0F, GLhalfARB, _mesa_half_to_float);
+ PROCESS(blueIndex, BCOMP, 0.0F, GLhalfARB, _mesa_half_to_float);
+ PROCESS(alphaIndex, ACOMP, 1.0F, GLhalfARB, _mesa_half_to_float);
+ break;
case GL_UNSIGNED_BYTE_3_3_2:
{
const GLubyte *ubsrc = (const GLubyte *) src;
GLuint i;
for (i = 0; i < n; i ++) {
GLubyte p = ubsrc[i];
- rgba[i][RCOMP] = ((p >> 5) ) * (1.0F / 7.0F);
- rgba[i][GCOMP] = ((p >> 2) & 0x7) * (1.0F / 7.0F);
- rgba[i][BCOMP] = ((p ) & 0x3) * (1.0F / 3.0F);
- rgba[i][ACOMP] = 1.0F;
+ rgba[i][rComp] = ((p >> 5) ) * (1.0F / 7.0F);
+ rgba[i][gComp] = ((p >> 2) & 0x7) * (1.0F / 7.0F);
+ rgba[i][bComp] = ((p ) & 0x3) * (1.0F / 3.0F);
+ rgba[i][aComp] = 1.0F;
}
}
break;
GLuint i;
for (i = 0; i < n; i ++) {
GLubyte p = ubsrc[i];
- rgba[i][RCOMP] = ((p ) & 0x7) * (1.0F / 7.0F);
- rgba[i][GCOMP] = ((p >> 3) & 0x7) * (1.0F / 7.0F);
- rgba[i][BCOMP] = ((p >> 6) ) * (1.0F / 3.0F);
- rgba[i][ACOMP] = 1.0F;
+ rgba[i][rComp] = ((p ) & 0x7) * (1.0F / 7.0F);
+ rgba[i][gComp] = ((p >> 3) & 0x7) * (1.0F / 7.0F);
+ rgba[i][bComp] = ((p >> 6) ) * (1.0F / 3.0F);
+ rgba[i][aComp] = 1.0F;
}
}
break;
for (i = 0; i < n; i ++) {
GLushort p = ussrc[i];
SWAP2BYTE(p);
- rgba[i][RCOMP] = ((p >> 11) ) * (1.0F / 31.0F);
- rgba[i][GCOMP] = ((p >> 5) & 0x3f) * (1.0F / 63.0F);
- rgba[i][BCOMP] = ((p ) & 0x1f) * (1.0F / 31.0F);
- rgba[i][ACOMP] = 1.0F;
+ rgba[i][rComp] = ((p >> 11) ) * (1.0F / 31.0F);
+ rgba[i][gComp] = ((p >> 5) & 0x3f) * (1.0F / 63.0F);
+ rgba[i][bComp] = ((p ) & 0x1f) * (1.0F / 31.0F);
+ rgba[i][aComp] = 1.0F;
}
}
else {
GLuint i;
for (i = 0; i < n; i ++) {
GLushort p = ussrc[i];
- rgba[i][RCOMP] = ((p >> 11) ) * (1.0F / 31.0F);
- rgba[i][GCOMP] = ((p >> 5) & 0x3f) * (1.0F / 63.0F);
- rgba[i][BCOMP] = ((p ) & 0x1f) * (1.0F / 31.0F);
- rgba[i][ACOMP] = 1.0F;
+ rgba[i][rComp] = ((p >> 11) ) * (1.0F / 31.0F);
+ rgba[i][gComp] = ((p >> 5) & 0x3f) * (1.0F / 63.0F);
+ rgba[i][bComp] = ((p ) & 0x1f) * (1.0F / 31.0F);
+ rgba[i][aComp] = 1.0F;
}
}
break;
for (i = 0; i < n; i ++) {
GLushort p = ussrc[i];
SWAP2BYTE(p);
- rgba[i][RCOMP] = ((p ) & 0x1f) * (1.0F / 31.0F);
- rgba[i][GCOMP] = ((p >> 5) & 0x3f) * (1.0F / 63.0F);
- rgba[i][BCOMP] = ((p >> 11) ) * (1.0F / 31.0F);
- rgba[i][ACOMP] = 1.0F;
+ rgba[i][rComp] = ((p ) & 0x1f) * (1.0F / 31.0F);
+ rgba[i][gComp] = ((p >> 5) & 0x3f) * (1.0F / 63.0F);
+ rgba[i][bComp] = ((p >> 11) ) * (1.0F / 31.0F);
+ rgba[i][aComp] = 1.0F;
}
}
else {
GLuint i;
for (i = 0; i < n; i ++) {
GLushort p = ussrc[i];
- rgba[i][RCOMP] = ((p ) & 0x1f) * (1.0F / 31.0F);
- rgba[i][GCOMP] = ((p >> 5) & 0x3f) * (1.0F / 63.0F);
- rgba[i][BCOMP] = ((p >> 11) ) * (1.0F / 31.0F);
- rgba[i][ACOMP] = 1.0F;
+ rgba[i][rComp] = ((p ) & 0x1f) * (1.0F / 31.0F);
+ rgba[i][gComp] = ((p >> 5) & 0x3f) * (1.0F / 63.0F);
+ rgba[i][bComp] = ((p >> 11) ) * (1.0F / 31.0F);
+ rgba[i][aComp] = 1.0F;
}
}
break;
}
break;
default:
- gl_problem(NULL, "bad srcType in extract float data");
+ _mesa_problem(NULL, "bad srcType in extract float data");
break;
}
}
-
/*
* Unpack a row of color image data from a client buffer according to
* the pixel unpacking parameters.
- * Return GLubyte values in the specified dest image format.
- * This is (or will be) used by glDrawPixels and glTexImage?D().
- * Input: ctx - the context
+ * Return GLchan values in the specified dest image format.
+ * This is used by glDrawPixels and glTexImage?D().
+ * \param ctx - the context
* n - number of pixels in the span
* dstFormat - format of destination color array
* dest - the destination color array
* srcFormat - source image format
- * srcType - source image datatype
+ * srcType - source image data type
* source - source image pointer
* srcPacking - pixel unpacking parameters
* transferOps - bitmask of IMAGE_*_BIT values of operations to apply
* XXX perhaps expand this to process whole images someday.
*/
void
-_mesa_unpack_chan_color_span( GLcontext *ctx,
+_mesa_unpack_color_span_chan( GLcontext *ctx,
GLuint n, GLenum dstFormat, GLchan dest[],
GLenum srcFormat, GLenum srcType,
const GLvoid *source,
const struct gl_pixelstore_attrib *srcPacking,
- GLuint transferOps )
+ GLbitfield transferOps )
{
ASSERT(dstFormat == GL_ALPHA ||
dstFormat == GL_LUMINANCE ||
srcType == GL_SHORT ||
srcType == GL_UNSIGNED_INT ||
srcType == GL_INT ||
+ srcType == GL_HALF_FLOAT_ARB ||
srcType == GL_FLOAT ||
srcType == GL_UNSIGNED_BYTE_3_3_2 ||
srcType == GL_UNSIGNED_BYTE_2_3_3_REV ||
srcType == GL_UNSIGNED_INT_10_10_10_2 ||
srcType == GL_UNSIGNED_INT_2_10_10_10_REV);
- /* this is intended for RGBA mode only */
- assert(ctx->Visual.RGBAflag);
-
/* Try simple cases first */
- if (transferOps == 0 && srcType == CHAN_TYPE) {
- if (dstFormat == GL_RGBA) {
- if (srcFormat == GL_RGBA) {
- MEMCPY( dest, source, n * 4 * sizeof(GLchan) );
- return;
+ if (transferOps == 0) {
+ if (srcType == CHAN_TYPE) {
+ if (dstFormat == GL_RGBA) {
+ if (srcFormat == GL_RGBA) {
+ _mesa_memcpy( dest, source, n * 4 * sizeof(GLchan) );
+ return;
+ }
+ else if (srcFormat == GL_RGB) {
+ GLuint i;
+ const GLchan *src = (const GLchan *) source;
+ GLchan *dst = dest;
+ for (i = 0; i < n; i++) {
+ dst[0] = src[0];
+ dst[1] = src[1];
+ dst[2] = src[2];
+ dst[3] = CHAN_MAX;
+ src += 3;
+ dst += 4;
+ }
+ return;
+ }
}
- else if (srcFormat == GL_RGB) {
- GLuint i;
- const GLchan *src = (const GLchan *) source;
- GLchan *dst = dest;
- for (i = 0; i < n; i++) {
- dst[0] = src[0];
- dst[1] = src[1];
- dst[2] = src[2];
- dst[3] = CHAN_MAX;
- src += 3;
- dst += 4;
+ else if (dstFormat == GL_RGB) {
+ if (srcFormat == GL_RGB) {
+ _mesa_memcpy( dest, source, n * 3 * sizeof(GLchan) );
+ return;
+ }
+ else if (srcFormat == GL_RGBA) {
+ GLuint i;
+ const GLchan *src = (const GLchan *) source;
+ GLchan *dst = dest;
+ for (i = 0; i < n; i++) {
+ dst[0] = src[0];
+ dst[1] = src[1];
+ dst[2] = src[2];
+ src += 4;
+ dst += 3;
+ }
+ return;
}
+ }
+ else if (dstFormat == srcFormat) {
+ GLint comps = _mesa_components_in_format(srcFormat);
+ assert(comps > 0);
+ _mesa_memcpy( dest, source, n * comps * sizeof(GLchan) );
return;
}
}
- else if (dstFormat == GL_RGB) {
- if (srcFormat == GL_RGB) {
- MEMCPY( dest, source, n * 3 * sizeof(GLchan) );
- return;
+ /*
+ * Common situation, loading 8bit RGBA/RGB source images
+ * into 16/32 bit destination. (OSMesa16/32)
+ */
+ else if (srcType == GL_UNSIGNED_BYTE) {
+ if (dstFormat == GL_RGBA) {
+ if (srcFormat == GL_RGB) {
+ GLuint i;
+ const GLubyte *src = (const GLubyte *) source;
+ GLchan *dst = dest;
+ for (i = 0; i < n; i++) {
+ dst[0] = UBYTE_TO_CHAN(src[0]);
+ dst[1] = UBYTE_TO_CHAN(src[1]);
+ dst[2] = UBYTE_TO_CHAN(src[2]);
+ dst[3] = CHAN_MAX;
+ src += 3;
+ dst += 4;
+ }
+ return;
+ }
+ else if (srcFormat == GL_RGBA) {
+ GLuint i;
+ const GLubyte *src = (const GLubyte *) source;
+ GLchan *dst = dest;
+ for (i = 0; i < n; i++) {
+ dst[0] = UBYTE_TO_CHAN(src[0]);
+ dst[1] = UBYTE_TO_CHAN(src[1]);
+ dst[2] = UBYTE_TO_CHAN(src[2]);
+ dst[3] = UBYTE_TO_CHAN(src[3]);
+ src += 4;
+ dst += 4;
+ }
+ return;
+ }
}
- else if (srcFormat == GL_RGBA) {
- GLuint i;
- const GLchan *src = (const GLchan *) source;
- GLchan *dst = dest;
- for (i = 0; i < n; i++) {
- dst[0] = src[0];
- dst[1] = src[1];
- dst[2] = src[2];
- src += 4;
- dst += 3;
+ else if (dstFormat == GL_RGB) {
+ if (srcFormat == GL_RGB) {
+ GLuint i;
+ const GLubyte *src = (const GLubyte *) source;
+ GLchan *dst = dest;
+ for (i = 0; i < n; i++) {
+ dst[0] = UBYTE_TO_CHAN(src[0]);
+ dst[1] = UBYTE_TO_CHAN(src[1]);
+ dst[2] = UBYTE_TO_CHAN(src[2]);
+ src += 3;
+ dst += 3;
+ }
+ return;
+ }
+ else if (srcFormat == GL_RGBA) {
+ GLuint i;
+ const GLubyte *src = (const GLubyte *) source;
+ GLchan *dst = dest;
+ for (i = 0; i < n; i++) {
+ dst[0] = UBYTE_TO_CHAN(src[0]);
+ dst[1] = UBYTE_TO_CHAN(src[1]);
+ dst[2] = UBYTE_TO_CHAN(src[2]);
+ src += 4;
+ dst += 3;
+ }
+ return;
}
- return;
}
}
- else if (dstFormat == srcFormat) {
- GLint comps = _mesa_components_in_format(srcFormat);
- assert(comps > 0);
- MEMCPY( dest, source, n * comps * sizeof(GLchan) );
- return;
- }
}
/* general solution begins here */
{
- GLfloat rgba[MAX_WIDTH][4];
GLint dstComponents;
GLint dstRedIndex, dstGreenIndex, dstBlueIndex, dstAlphaIndex;
GLint dstLuminanceIndex, dstIntensityIndex;
+ GLfloat rgba[MAX_WIDTH][4];
dstComponents = _mesa_components_in_format( dstFormat );
/* source & dest image formats should have been error checked by now */
extract_uint_indexes(n, indexes, srcFormat, srcType, source,
srcPacking);
- if (dstFormat == GL_COLOR_INDEX
- && (transferOps & IMAGE_MAP_COLOR_BIT)) {
- _mesa_map_ci(ctx, n, indexes);
- }
- if (transferOps & IMAGE_SHIFT_OFFSET_BIT) {
- _mesa_shift_and_offset_ci(ctx, n, indexes);
- }
-
if (dstFormat == GL_COLOR_INDEX) {
- /* convert to GLchan and return */
GLuint i;
+ _mesa_apply_ci_transfer_ops(ctx, transferOps, n, indexes);
+ /* convert to GLchan and return */
for (i = 0; i < n; i++) {
dest[i] = (GLchan) (indexes[i] & 0xff);
}
}
else {
/* Convert indexes to RGBA */
+ if (transferOps & IMAGE_SHIFT_OFFSET_BIT) {
+ shift_and_offset_ci(ctx, n, indexes);
+ }
_mesa_map_ci_to_rgba(ctx, n, indexes, rgba);
}
+
+ /* Don't do RGBA scale/bias or RGBA->RGBA mapping if starting
+ * with color indexes.
+ */
+ transferOps &= ~(IMAGE_SCALE_BIAS_BIT | IMAGE_MAP_COLOR_BIT);
}
else {
+ /* non-color index data */
extract_float_rgba(n, rgba, srcFormat, srcType, source,
srcPacking->SwapBytes);
-
- /* scale and bias colors */
- if (transferOps & IMAGE_SCALE_BIAS_BIT) {
- _mesa_scale_and_bias_rgba(ctx, n, rgba,
- ctx->Pixel.RedScale, ctx->Pixel.GreenScale,
- ctx->Pixel.BlueScale, ctx->Pixel.AlphaScale,
- ctx->Pixel.RedBias, ctx->Pixel.GreenBias,
- ctx->Pixel.BlueBias, ctx->Pixel.AlphaBias);
- }
- /* color map lookup */
- if (transferOps & IMAGE_MAP_COLOR_BIT) {
- _mesa_map_rgba(ctx, n, rgba);
- }
}
- if (transferOps) {
- /* GL_COLOR_TABLE lookup */
- if (transferOps & IMAGE_COLOR_TABLE_BIT) {
- _mesa_lookup_rgba(&ctx->ColorTable, n, rgba);
- }
- /* convolution */
- if (transferOps & IMAGE_CONVOLUTION_BIT) {
- /* this has to be done in the calling code */
- }
- /* GL_POST_CONVOLUTION_RED/GREEN/BLUE/ALPHA_SCALE/BIAS */
- if (transferOps & IMAGE_POST_CONVOLUTION_SCALE_BIAS) {
- _mesa_scale_and_bias_rgba(ctx, n, rgba,
- ctx->Pixel.PostConvolutionScale[RCOMP],
- ctx->Pixel.PostConvolutionScale[GCOMP],
- ctx->Pixel.PostConvolutionScale[BCOMP],
- ctx->Pixel.PostConvolutionScale[ACOMP],
- ctx->Pixel.PostConvolutionBias[RCOMP],
- ctx->Pixel.PostConvolutionBias[GCOMP],
- ctx->Pixel.PostConvolutionBias[BCOMP],
- ctx->Pixel.PostConvolutionBias[ACOMP]);
- }
- /* GL_POST_CONVOLUTION_COLOR_TABLE lookup */
- if (transferOps & IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT) {
- _mesa_lookup_rgba(&ctx->PostConvolutionColorTable, n, rgba);
- }
- /* color matrix transform */
- if (transferOps & IMAGE_COLOR_MATRIX_BIT) {
- _mesa_transform_rgba(ctx, n, rgba);
- }
- /* GL_POST_COLOR_MATRIX_COLOR_TABLE lookup */
- if (transferOps & IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT) {
- _mesa_lookup_rgba(&ctx->PostColorMatrixColorTable, n, rgba);
- }
- /* update histogram count */
- if (transferOps & IMAGE_HISTOGRAM_BIT) {
- _mesa_update_histogram(ctx, n, (CONST GLfloat (*)[4]) rgba);
- }
- /* min/max here */
- if (transferOps & IMAGE_MIN_MAX_BIT) {
- _mesa_update_minmax(ctx, n, (CONST GLfloat (*)[4]) rgba);
- }
- }
+ /* Need to clamp if returning GLubytes or GLushorts */
+#if CHAN_TYPE != GL_FLOAT
+ transferOps |= IMAGE_CLAMP_BIT;
+#endif
- /* clamp to [0,1] */
- {
- GLuint i;
- for (i = 0; i < n; i++) {
- rgba[i][RCOMP] = CLAMP(rgba[i][RCOMP], 0.0F, 1.0F);
- rgba[i][GCOMP] = CLAMP(rgba[i][GCOMP], 0.0F, 1.0F);
- rgba[i][BCOMP] = CLAMP(rgba[i][BCOMP], 0.0F, 1.0F);
- rgba[i][ACOMP] = CLAMP(rgba[i][ACOMP], 0.0F, 1.0F);
- }
+ if (transferOps) {
+ _mesa_apply_rgba_transfer_ops(ctx, transferOps, n, rgba);
}
/* Now determine which color channels we need to produce.
dstLuminanceIndex = dstIntensityIndex = -1;
break;
default:
- gl_problem(ctx, "bad dstFormat in _mesa_unpack_chan_span()");
+ _mesa_problem(ctx, "bad dstFormat in _mesa_unpack_chan_span()");
return;
}
}
+/**
+ * Same as _mesa_unpack_color_span_chan(), but return GLfloat data
+ * instead of GLchan.
+ */
void
-_mesa_unpack_float_color_span( GLcontext *ctx,
+_mesa_unpack_color_span_float( GLcontext *ctx,
GLuint n, GLenum dstFormat, GLfloat dest[],
GLenum srcFormat, GLenum srcType,
const GLvoid *source,
const struct gl_pixelstore_attrib *srcPacking,
- GLuint transferOps, GLboolean clamp )
+ GLbitfield transferOps )
{
ASSERT(dstFormat == GL_ALPHA ||
dstFormat == GL_LUMINANCE ||
srcType == GL_SHORT ||
srcType == GL_UNSIGNED_INT ||
srcType == GL_INT ||
+ srcType == GL_HALF_FLOAT_ARB ||
srcType == GL_FLOAT ||
srcType == GL_UNSIGNED_BYTE_3_3_2 ||
srcType == GL_UNSIGNED_BYTE_2_3_3_REV ||
srcType == GL_UNSIGNED_INT_10_10_10_2 ||
srcType == GL_UNSIGNED_INT_2_10_10_10_REV);
- /* this is intended for RGBA mode only */
- assert(ctx->Visual.RGBAflag);
-
/* general solution, no special cases, yet */
{
- GLfloat rgba[MAX_WIDTH][4];
GLint dstComponents;
GLint dstRedIndex, dstGreenIndex, dstBlueIndex, dstAlphaIndex;
GLint dstLuminanceIndex, dstIntensityIndex;
+ GLfloat rgba[MAX_WIDTH][4];
dstComponents = _mesa_components_in_format( dstFormat );
/* source & dest image formats should have been error checked by now */
extract_uint_indexes(n, indexes, srcFormat, srcType, source,
srcPacking);
- if (dstFormat == GL_COLOR_INDEX
- && (transferOps & IMAGE_MAP_COLOR_BIT)) {
- _mesa_map_ci(ctx, n, indexes);
- }
- if (transferOps & IMAGE_SHIFT_OFFSET_BIT) {
- _mesa_shift_and_offset_ci(ctx, n, indexes);
- }
-
if (dstFormat == GL_COLOR_INDEX) {
- /* convert to GLchan and return */
GLuint i;
+ _mesa_apply_ci_transfer_ops(ctx, transferOps, n, indexes);
+ /* convert to GLchan and return */
for (i = 0; i < n; i++) {
dest[i] = (GLchan) (indexes[i] & 0xff);
}
}
else {
/* Convert indexes to RGBA */
+ if (transferOps & IMAGE_SHIFT_OFFSET_BIT) {
+ shift_and_offset_ci(ctx, n, indexes);
+ }
_mesa_map_ci_to_rgba(ctx, n, indexes, rgba);
}
+
+ /* Don't do RGBA scale/bias or RGBA->RGBA mapping if starting
+ * with color indexes.
+ */
+ transferOps &= ~(IMAGE_SCALE_BIAS_BIT | IMAGE_MAP_COLOR_BIT);
}
else {
+ /* non-color index data */
extract_float_rgba(n, rgba, srcFormat, srcType, source,
srcPacking->SwapBytes);
-
- /* scale and bias colors */
- if (transferOps & IMAGE_SCALE_BIAS_BIT) {
- _mesa_scale_and_bias_rgba(ctx, n, rgba,
- ctx->Pixel.RedScale, ctx->Pixel.GreenScale,
- ctx->Pixel.BlueScale, ctx->Pixel.AlphaScale,
- ctx->Pixel.RedBias, ctx->Pixel.GreenBias,
- ctx->Pixel.BlueBias, ctx->Pixel.AlphaBias);
- }
- /* color map lookup */
- if (transferOps & IMAGE_MAP_COLOR_BIT) {
- _mesa_map_rgba(ctx, n, rgba);
- }
}
if (transferOps) {
- /* GL_COLOR_TABLE lookup */
- if (transferOps & IMAGE_COLOR_TABLE_BIT) {
- _mesa_lookup_rgba(&ctx->ColorTable, n, rgba);
- }
- /* convolution */
- if (transferOps & IMAGE_CONVOLUTION_BIT) {
- /* XXX to do */
- }
- /* GL_POST_CONVOLUTION_RED/GREEN/BLUE/ALPHA_SCALE/BIAS */
- if (transferOps & IMAGE_POST_CONVOLUTION_SCALE_BIAS) {
- _mesa_scale_and_bias_rgba(ctx, n, rgba,
- ctx->Pixel.PostConvolutionScale[RCOMP],
- ctx->Pixel.PostConvolutionScale[GCOMP],
- ctx->Pixel.PostConvolutionScale[BCOMP],
- ctx->Pixel.PostConvolutionScale[ACOMP],
- ctx->Pixel.PostConvolutionBias[RCOMP],
- ctx->Pixel.PostConvolutionBias[GCOMP],
- ctx->Pixel.PostConvolutionBias[BCOMP],
- ctx->Pixel.PostConvolutionBias[ACOMP]);
- }
- /* GL_POST_CONVOLUTION_COLOR_TABLE lookup */
- if (transferOps & IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT) {
- _mesa_lookup_rgba(&ctx->PostConvolutionColorTable, n, rgba);
- }
- /* color matrix transform */
- if (transferOps & IMAGE_COLOR_MATRIX_BIT) {
- _mesa_transform_rgba(ctx, n, rgba);
- }
- /* GL_POST_COLOR_MATRIX_COLOR_TABLE lookup */
- if (transferOps & IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT) {
- _mesa_lookup_rgba(&ctx->PostColorMatrixColorTable, n, rgba);
- }
- /* update histogram count */
- if (transferOps & IMAGE_HISTOGRAM_BIT) {
- _mesa_update_histogram(ctx, n, (CONST GLfloat (*)[4]) rgba);
- }
- /* min/max here */
- if (transferOps & IMAGE_MIN_MAX_BIT) {
- _mesa_update_minmax(ctx, n, (CONST GLfloat (*)[4]) rgba);
- }
- }
-
- /* clamp to [0,1] */
- if (clamp) {
- GLuint i;
- for (i = 0; i < n; i++) {
- rgba[i][RCOMP] = CLAMP(rgba[i][RCOMP], 0.0F, 1.0F);
- rgba[i][GCOMP] = CLAMP(rgba[i][GCOMP], 0.0F, 1.0F);
- rgba[i][BCOMP] = CLAMP(rgba[i][BCOMP], 0.0F, 1.0F);
- rgba[i][ACOMP] = CLAMP(rgba[i][ACOMP], 0.0F, 1.0F);
- }
+ _mesa_apply_rgba_transfer_ops(ctx, transferOps, n, rgba);
}
/* Now determine which color channels we need to produce.
dstLuminanceIndex = dstIntensityIndex = -1;
break;
default:
- gl_problem(ctx, "bad dstFormat in _mesa_unpack_float_color_span()");
+ _mesa_problem(ctx, "bad dstFormat in _mesa_unpack_color_span_float()");
return;
}
}
-
-
/*
* Unpack a row of color index data from a client buffer according to
* the pixel unpacking parameters.
*
* Args: ctx - the context
* n - number of pixels
- * dstType - destination datatype
+ * dstType - destination data type
* dest - destination array
* srcType - source pixel type
* source - source data pointer
GLenum dstType, GLvoid *dest,
GLenum srcType, const GLvoid *source,
const struct gl_pixelstore_attrib *srcPacking,
- GLuint transferOps )
+ GLbitfield transferOps )
{
ASSERT(srcType == GL_BITMAP ||
srcType == GL_UNSIGNED_BYTE ||
srcType == GL_SHORT ||
srcType == GL_UNSIGNED_INT ||
srcType == GL_INT ||
+ srcType == GL_HALF_FLOAT_ARB ||
srcType == GL_FLOAT);
ASSERT(dstType == GL_UNSIGNED_BYTE ||
*/
if (transferOps == 0 && srcType == GL_UNSIGNED_BYTE
&& dstType == GL_UNSIGNED_BYTE) {
- MEMCPY(dest, source, n * sizeof(GLubyte));
+ _mesa_memcpy(dest, source, n * sizeof(GLubyte));
}
else if (transferOps == 0 && srcType == GL_UNSIGNED_INT
&& dstType == GL_UNSIGNED_INT && !srcPacking->SwapBytes) {
- MEMCPY(dest, source, n * sizeof(GLuint));
+ _mesa_memcpy(dest, source, n * sizeof(GLuint));
}
else {
/*
extract_uint_indexes(n, indexes, GL_COLOR_INDEX, srcType, source,
srcPacking);
- if (transferOps & IMAGE_SHIFT_OFFSET_BIT) {
- /* shift and offset indexes */
- _mesa_shift_and_offset_ci(ctx, n, indexes);
- }
- if (transferOps & IMAGE_MAP_COLOR_BIT) {
- /* Apply lookup table */
- _mesa_map_ci(ctx, n, indexes);
- }
+ if (transferOps)
+ _mesa_apply_ci_transfer_ops(ctx, transferOps, n, indexes);
/* convert to dest type */
switch (dstType) {
}
break;
case GL_UNSIGNED_INT:
- MEMCPY(dest, indexes, n * sizeof(GLuint));
+ _mesa_memcpy(dest, indexes, n * sizeof(GLuint));
break;
default:
- gl_problem(ctx, "bad dstType in _mesa_unpack_index_span");
+ _mesa_problem(ctx, "bad dstType in _mesa_unpack_index_span");
}
}
}
-/*
- * Unpack a row of stencil data from a client buffer according to
- * the pixel unpacking parameters.
- * This is (or will be) used by glDrawPixels
- *
- * Args: ctx - the context
- * n - number of pixels
- * dstType - destination datatype
- * dest - destination array
- * srcType - source pixel type
- * source - source data pointer
- * srcPacking - pixel unpacking parameters
- * transferOps - apply offset/bias/lookup ops?
- */
void
-_mesa_unpack_stencil_span( const GLcontext *ctx, GLuint n,
- GLenum dstType, GLvoid *dest,
- GLenum srcType, const GLvoid *source,
- const struct gl_pixelstore_attrib *srcPacking,
- GLuint transferOps )
+_mesa_pack_index_span( const GLcontext *ctx, GLuint n,
+ GLenum dstType, GLvoid *dest, const GLuint *source,
+ const struct gl_pixelstore_attrib *dstPacking,
+ GLbitfield transferOps )
{
- ASSERT(srcType == GL_BITMAP ||
- srcType == GL_UNSIGNED_BYTE ||
- srcType == GL_BYTE ||
- srcType == GL_UNSIGNED_SHORT ||
- srcType == GL_SHORT ||
- srcType == GL_UNSIGNED_INT ||
- srcType == GL_INT ||
- srcType == GL_FLOAT);
+ GLuint indexes[MAX_WIDTH];
- ASSERT(dstType == GL_UNSIGNED_BYTE ||
- dstType == GL_UNSIGNED_SHORT ||
- dstType == GL_UNSIGNED_INT);
+ ASSERT(n <= MAX_WIDTH);
- /* only shift and offset apply to stencil */
- transferOps &= IMAGE_SHIFT_OFFSET_BIT;
+ transferOps &= (IMAGE_MAP_COLOR_BIT | IMAGE_SHIFT_OFFSET_BIT);
- /*
- * Try simple cases first
- */
- if (transferOps == 0 &&
- srcType == GL_UNSIGNED_BYTE &&
- dstType == GL_UNSIGNED_BYTE) {
- MEMCPY(dest, source, n * sizeof(GLubyte));
+ if (transferOps & (IMAGE_MAP_COLOR_BIT | IMAGE_SHIFT_OFFSET_BIT)) {
+ /* make a copy of input */
+ _mesa_memcpy(indexes, source, n * sizeof(GLuint));
+ _mesa_apply_ci_transfer_ops(ctx, transferOps, n, indexes);
+ source = indexes;
}
- else if (transferOps == 0 &&
- srcType == GL_UNSIGNED_INT &&
- dstType == GL_UNSIGNED_INT &&
- !srcPacking->SwapBytes) {
- MEMCPY(dest, source, n * sizeof(GLuint));
- }
- else {
- /*
- * general solution
+
+ switch (dstType) {
+ case GL_UNSIGNED_BYTE:
+ {
+ GLubyte *dst = (GLubyte *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ *dst++ = (GLubyte) source[i];
+ }
+ }
+ break;
+ case GL_BYTE:
+ {
+ GLbyte *dst = (GLbyte *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ dst[i] = (GLbyte) source[i];
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT:
+ {
+ GLushort *dst = (GLushort *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ dst[i] = (GLushort) source[i];
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap2( (GLushort *) dst, n );
+ }
+ }
+ break;
+ case GL_SHORT:
+ {
+ GLshort *dst = (GLshort *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ dst[i] = (GLshort) source[i];
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap2( (GLushort *) dst, n );
+ }
+ }
+ break;
+ case GL_UNSIGNED_INT:
+ {
+ GLuint *dst = (GLuint *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ dst[i] = (GLuint) source[i];
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap4( (GLuint *) dst, n );
+ }
+ }
+ break;
+ case GL_INT:
+ {
+ GLint *dst = (GLint *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ dst[i] = (GLint) source[i];
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap4( (GLuint *) dst, n );
+ }
+ }
+ break;
+ case GL_FLOAT:
+ {
+ GLfloat *dst = (GLfloat *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ dst[i] = (GLfloat) source[i];
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap4( (GLuint *) dst, n );
+ }
+ }
+ break;
+ case GL_HALF_FLOAT_ARB:
+ {
+ GLhalfARB *dst = (GLhalfARB *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ dst[i] = _mesa_float_to_half((GLfloat) source[i]);
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap2( (GLushort *) dst, n );
+ }
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "bad type in _mesa_pack_index_span");
+ }
+}
+
+
+/*
+ * Unpack a row of stencil data from a client buffer according to
+ * the pixel unpacking parameters.
+ * This is (or will be) used by glDrawPixels
+ *
+ * Args: ctx - the context
+ * n - number of pixels
+ * dstType - destination data type
+ * dest - destination array
+ * srcType - source pixel type
+ * source - source data pointer
+ * srcPacking - pixel unpacking parameters
+ * transferOps - apply offset/bias/lookup ops?
+ */
+void
+_mesa_unpack_stencil_span( const GLcontext *ctx, GLuint n,
+ GLenum dstType, GLvoid *dest,
+ GLenum srcType, const GLvoid *source,
+ const struct gl_pixelstore_attrib *srcPacking,
+ GLbitfield transferOps )
+{
+ ASSERT(srcType == GL_BITMAP ||
+ srcType == GL_UNSIGNED_BYTE ||
+ srcType == GL_BYTE ||
+ srcType == GL_UNSIGNED_SHORT ||
+ srcType == GL_SHORT ||
+ srcType == GL_UNSIGNED_INT ||
+ srcType == GL_INT ||
+ srcType == GL_UNSIGNED_INT_24_8_EXT ||
+ srcType == GL_HALF_FLOAT_ARB ||
+ srcType == GL_FLOAT);
+
+ ASSERT(dstType == GL_UNSIGNED_BYTE ||
+ dstType == GL_UNSIGNED_SHORT ||
+ dstType == GL_UNSIGNED_INT);
+
+ /* only shift and offset apply to stencil */
+ transferOps &= IMAGE_SHIFT_OFFSET_BIT;
+
+ /*
+ * Try simple cases first
+ */
+ if (transferOps == 0 &&
+ srcType == GL_UNSIGNED_BYTE &&
+ dstType == GL_UNSIGNED_BYTE) {
+ _mesa_memcpy(dest, source, n * sizeof(GLubyte));
+ }
+ else if (transferOps == 0 &&
+ srcType == GL_UNSIGNED_INT &&
+ dstType == GL_UNSIGNED_INT &&
+ !srcPacking->SwapBytes) {
+ _mesa_memcpy(dest, source, n * sizeof(GLuint));
+ }
+ else {
+ /*
+ * general solution
*/
GLuint indexes[MAX_WIDTH];
assert(n <= MAX_WIDTH);
- extract_uint_indexes(n, indexes, GL_COLOR_INDEX, srcType, source,
+ extract_uint_indexes(n, indexes, GL_STENCIL_INDEX, srcType, source,
srcPacking);
if (transferOps) {
if (transferOps & IMAGE_SHIFT_OFFSET_BIT) {
/* shift and offset indexes */
- _mesa_shift_and_offset_ci(ctx, n, indexes);
+ shift_and_offset_ci(ctx, n, indexes);
}
if (ctx->Pixel.MapStencilFlag) {
/* Apply stencil lookup table */
- GLuint mask = ctx->Pixel.MapStoSsize - 1;
+ GLuint mask = ctx->PixelMaps.StoS.Size - 1;
GLuint i;
for (i=0;i<n;i++) {
- indexes[i] = ctx->Pixel.MapStoS[ indexes[i] & mask ];
+ indexes[i] = ctx->PixelMaps.StoS.Map[ indexes[i] & mask ];
}
}
}
}
break;
case GL_UNSIGNED_INT:
- MEMCPY(dest, indexes, n * sizeof(GLuint));
+ _mesa_memcpy(dest, indexes, n * sizeof(GLuint));
break;
default:
- gl_problem(ctx, "bad dstType in _mesa_unpack_stencil_span");
+ _mesa_problem(ctx, "bad dstType in _mesa_unpack_stencil_span");
}
}
}
+void
+_mesa_pack_stencil_span( const GLcontext *ctx, GLuint n,
+ GLenum dstType, GLvoid *dest, const GLstencil *source,
+ const struct gl_pixelstore_attrib *dstPacking )
+{
+ GLstencil stencil[MAX_WIDTH];
+
+ ASSERT(n <= MAX_WIDTH);
+
+ if (ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset ||
+ ctx->Pixel.MapStencilFlag) {
+ /* make a copy of input */
+ _mesa_memcpy(stencil, source, n * sizeof(GLstencil));
+ _mesa_apply_stencil_transfer_ops(ctx, n, stencil);
+ source = stencil;
+ }
+
+ switch (dstType) {
+ case GL_UNSIGNED_BYTE:
+ if (sizeof(GLstencil) == 8) {
+ _mesa_memcpy( dest, source, n );
+ }
+ else {
+ GLubyte *dst = (GLubyte *) dest;
+ GLuint i;
+ for (i=0;i<n;i++) {
+ dst[i] = (GLubyte) source[i];
+ }
+ }
+ break;
+ case GL_BYTE:
+ if (sizeof(GLstencil) == 8) {
+ _mesa_memcpy( dest, source, n );
+ }
+ else {
+ GLbyte *dst = (GLbyte *) dest;
+ GLuint i;
+ for (i=0;i<n;i++) {
+ dst[i] = (GLbyte) source[i];
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT:
+ {
+ GLushort *dst = (GLushort *) dest;
+ GLuint i;
+ for (i=0;i<n;i++) {
+ dst[i] = (GLushort) source[i];
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap2( (GLushort *) dst, n );
+ }
+ }
+ break;
+ case GL_SHORT:
+ {
+ GLshort *dst = (GLshort *) dest;
+ GLuint i;
+ for (i=0;i<n;i++) {
+ dst[i] = (GLshort) source[i];
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap2( (GLushort *) dst, n );
+ }
+ }
+ break;
+ case GL_UNSIGNED_INT:
+ {
+ GLuint *dst = (GLuint *) dest;
+ GLuint i;
+ for (i=0;i<n;i++) {
+ dst[i] = (GLuint) source[i];
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap4( (GLuint *) dst, n );
+ }
+ }
+ break;
+ case GL_INT:
+ {
+ GLint *dst = (GLint *) dest;
+ GLuint i;
+ for (i=0;i<n;i++) {
+ *dst++ = (GLint) source[i];
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap4( (GLuint *) dst, n );
+ }
+ }
+ break;
+ case GL_FLOAT:
+ {
+ GLfloat *dst = (GLfloat *) dest;
+ GLuint i;
+ for (i=0;i<n;i++) {
+ dst[i] = (GLfloat) source[i];
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap4( (GLuint *) dst, n );
+ }
+ }
+ break;
+ case GL_HALF_FLOAT_ARB:
+ {
+ GLhalfARB *dst = (GLhalfARB *) dest;
+ GLuint i;
+ for (i=0;i<n;i++) {
+ dst[i] = _mesa_float_to_half( (float) source[i] );
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap2( (GLushort *) dst, n );
+ }
+ }
+ break;
+ case GL_BITMAP:
+ if (dstPacking->LsbFirst) {
+ GLubyte *dst = (GLubyte *) dest;
+ GLint shift = 0;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ if (shift == 0)
+ *dst = 0;
+ *dst |= ((source[i] != 0) << shift);
+ shift++;
+ if (shift == 8) {
+ shift = 0;
+ dst++;
+ }
+ }
+ }
+ else {
+ GLubyte *dst = (GLubyte *) dest;
+ GLint shift = 7;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ if (shift == 7)
+ *dst = 0;
+ *dst |= ((source[i] != 0) << shift);
+ shift--;
+ if (shift < 0) {
+ shift = 7;
+ dst++;
+ }
+ }
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "bad type in _mesa_pack_index_span");
+ }
+}
+
void
-_mesa_unpack_depth_span( const GLcontext *ctx, GLuint n, GLdepth *dest,
+_mesa_unpack_depth_span( const GLcontext *ctx, GLuint n,
+ GLenum dstType, GLvoid *dest, GLfloat depthScale,
GLenum srcType, const GLvoid *source,
- const struct gl_pixelstore_attrib *srcPacking,
- GLuint transferOps )
+ const struct gl_pixelstore_attrib *srcPacking )
{
- GLfloat *depth = MALLOC(n * sizeof(GLfloat));
- if (!depth)
- return;
+ GLfloat depthTemp[MAX_WIDTH], *depthValues;
+
+ if (dstType == GL_FLOAT) {
+ depthValues = (GLfloat *) dest;
+ }
+ else {
+ depthValues = depthTemp;
+ }
+
+ /* XXX we need to obey srcPacking->SwapBytes here!!! */
+ (void) srcPacking;
switch (srcType) {
case GL_BYTE:
GLuint i;
const GLubyte *src = (const GLubyte *) source;
for (i = 0; i < n; i++) {
- depth[i] = BYTE_TO_FLOAT(src[i]);
+ depthValues[i] = BYTE_TO_FLOAT(src[i]);
}
}
break;
GLuint i;
const GLubyte *src = (const GLubyte *) source;
for (i = 0; i < n; i++) {
- depth[i] = UBYTE_TO_FLOAT(src[i]);
+ depthValues[i] = UBYTE_TO_FLOAT(src[i]);
}
}
break;
GLuint i;
const GLshort *src = (const GLshort *) source;
for (i = 0; i < n; i++) {
- depth[i] = SHORT_TO_FLOAT(src[i]);
+ depthValues[i] = SHORT_TO_FLOAT(src[i]);
}
}
break;
GLuint i;
const GLushort *src = (const GLushort *) source;
for (i = 0; i < n; i++) {
- depth[i] = USHORT_TO_FLOAT(src[i]);
+ depthValues[i] = USHORT_TO_FLOAT(src[i]);
}
}
break;
GLuint i;
const GLint *src = (const GLint *) source;
for (i = 0; i < n; i++) {
- depth[i] = INT_TO_FLOAT(src[i]);
+ depthValues[i] = INT_TO_FLOAT(src[i]);
}
}
break;
GLuint i;
const GLuint *src = (const GLuint *) source;
for (i = 0; i < n; i++) {
- depth[i] = UINT_TO_FLOAT(src[i]);
+ depthValues[i] = UINT_TO_FLOAT(src[i]);
+ }
+ }
+ break;
+ case GL_UNSIGNED_INT_24_8_EXT: /* GL_EXT_packed_depth_stencil */
+ if (dstType == GL_UNSIGNED_INT &&
+ depthScale == (GLfloat) 0xffffff &&
+ ctx->Pixel.DepthScale == 1.0 &&
+ ctx->Pixel.DepthBias == 0.0) {
+ const GLuint *src = (const GLuint *) source;
+ GLuint *zValues = (GLuint *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ zValues[i] = src[i] & 0xffffff00;
+ }
+ return;
+ }
+ else {
+ const GLuint *src = (const GLuint *) source;
+ const GLfloat scale = 1.0f / 0xffffff;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ depthValues[i] = (src[i] >> 8) * scale;
}
}
break;
case GL_FLOAT:
- MEMCPY(depth, source, n * sizeof(GLfloat));
+ _mesa_memcpy(depthValues, source, n * sizeof(GLfloat));
+ break;
+ case GL_HALF_FLOAT_ARB:
+ {
+ GLuint i;
+ const GLhalfARB *src = (const GLhalfARB *) source;
+ for (i = 0; i < n; i++) {
+ depthValues[i] = _mesa_half_to_float(src[i]);
+ }
+ }
break;
default:
- gl_problem(NULL, "bad type in _mesa_unpack_depth_span()");
- FREE(depth);
+ _mesa_problem(NULL, "bad type in _mesa_unpack_depth_span()");
return;
}
- /* apply depth scale and bias */
+ /* apply depth scale and bias and clamp to [0,1] */
if (ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0) {
+ _mesa_scale_and_bias_depth(ctx, n, depthValues);
+ }
+
+ if (dstType == GL_UNSIGNED_INT) {
+ GLuint *zValues = (GLuint *) dest;
GLuint i;
- for (i = 0; i < n; i++) {
- depth[i] = depth[i] * ctx->Pixel.DepthScale + ctx->Pixel.DepthBias;
+ if (depthScale <= (GLfloat) 0xffffff) {
+ /* no overflow worries */
+ for (i = 0; i < n; i++) {
+ zValues[i] = (GLuint) (depthValues[i] * depthScale);
+ }
+ }
+ else {
+ /* need to use double precision to prevent overflow problems */
+ for (i = 0; i < n; i++) {
+ GLdouble z = depthValues[i] * depthScale;
+ if (z >= (GLdouble) 0xffffffff)
+ zValues[i] = 0xffffffff;
+ else
+ zValues[i] = (GLuint) z;
+ }
}
}
-
- /* clamp depth values to [0,1] and convert from floats to integers */
- {
- const GLfloat zs = ctx->Visual.DepthMaxF;
+ else if (dstType == GL_UNSIGNED_SHORT) {
+ GLushort *zValues = (GLushort *) dest;
GLuint i;
+ ASSERT(depthScale <= 65535.0);
for (i = 0; i < n; i++) {
- dest[i] = (GLdepth) (CLAMP(depth[i], 0.0F, 1.0F) * zs);
+ zValues[i] = (GLushort) (depthValues[i] * depthScale);
}
}
+ else {
+ ASSERT(dstType == GL_FLOAT);
+ ASSERT(depthScale == 1.0F);
+ }
+}
+
+
+/*
+ * Pack an array of depth values. The values are floats in [0,1].
+ */
+void
+_mesa_pack_depth_span( const GLcontext *ctx, GLuint n, GLvoid *dest,
+ GLenum dstType, const GLfloat *depthSpan,
+ const struct gl_pixelstore_attrib *dstPacking )
+{
+ GLfloat depthCopy[MAX_WIDTH];
+
+ ASSERT(n <= MAX_WIDTH);
- FREE(depth);
+ if (ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0) {
+ _mesa_memcpy(depthCopy, depthSpan, n * sizeof(GLfloat));
+ _mesa_scale_and_bias_depth(ctx, n, depthCopy);
+ depthSpan = depthCopy;
+ }
+
+ switch (dstType) {
+ case GL_UNSIGNED_BYTE:
+ {
+ GLubyte *dst = (GLubyte *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ dst[i] = FLOAT_TO_UBYTE( depthSpan[i] );
+ }
+ }
+ break;
+ case GL_BYTE:
+ {
+ GLbyte *dst = (GLbyte *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ dst[i] = FLOAT_TO_BYTE( depthSpan[i] );
+ }
+ }
+ break;
+ case GL_UNSIGNED_SHORT:
+ {
+ GLushort *dst = (GLushort *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ CLAMPED_FLOAT_TO_USHORT(dst[i], depthSpan[i]);
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap2( (GLushort *) dst, n );
+ }
+ }
+ break;
+ case GL_SHORT:
+ {
+ GLshort *dst = (GLshort *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ dst[i] = FLOAT_TO_SHORT( depthSpan[i] );
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap2( (GLushort *) dst, n );
+ }
+ }
+ break;
+ case GL_UNSIGNED_INT:
+ {
+ GLuint *dst = (GLuint *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ dst[i] = FLOAT_TO_UINT( depthSpan[i] );
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap4( (GLuint *) dst, n );
+ }
+ }
+ break;
+ case GL_INT:
+ {
+ GLint *dst = (GLint *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ dst[i] = FLOAT_TO_INT( depthSpan[i] );
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap4( (GLuint *) dst, n );
+ }
+ }
+ break;
+ case GL_FLOAT:
+ {
+ GLfloat *dst = (GLfloat *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ dst[i] = depthSpan[i];
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap4( (GLuint *) dst, n );
+ }
+ }
+ break;
+ case GL_HALF_FLOAT_ARB:
+ {
+ GLhalfARB *dst = (GLhalfARB *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ dst[i] = _mesa_float_to_half(depthSpan[i]);
+ }
+ if (dstPacking->SwapBytes) {
+ _mesa_swap2( (GLushort *) dst, n );
+ }
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "bad type in _mesa_pack_depth_span");
+ }
}
-/*
- * Unpack image data. Apply byteswapping, byte flipping (bitmap).
- * Return all image data in a contiguous block.
+/**
+ * Pack depth and stencil values as GL_DEPTH_STENCIL/GL_UNSIGNED_INT_24_8.
+ */
+void
+_mesa_pack_depth_stencil_span(const GLcontext *ctx, GLuint n, GLuint *dest,
+ const GLfloat *depthVals,
+ const GLstencil *stencilVals,
+ const struct gl_pixelstore_attrib *dstPacking)
+{
+ GLfloat depthCopy[MAX_WIDTH];
+ GLstencil stencilCopy[MAX_WIDTH];
+ GLuint i;
+
+ ASSERT(n <= MAX_WIDTH);
+
+ if (ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0) {
+ _mesa_memcpy(depthCopy, depthVals, n * sizeof(GLfloat));
+ _mesa_scale_and_bias_depth(ctx, n, depthCopy);
+ depthVals = depthCopy;
+ }
+
+ if (ctx->Pixel.IndexShift ||
+ ctx->Pixel.IndexOffset ||
+ ctx->Pixel.MapStencilFlag) {
+ _mesa_memcpy(stencilCopy, stencilVals, n * sizeof(GLstencil));
+ _mesa_apply_stencil_transfer_ops(ctx, n, stencilCopy);
+ stencilVals = stencilCopy;
+ }
+
+ for (i = 0; i < n; i++) {
+ GLuint z = (GLuint) (depthVals[i] * 0xffffff);
+ dest[i] = (z << 8) | (stencilVals[i] & 0xff);
+ }
+
+ if (dstPacking->SwapBytes) {
+ _mesa_swap4(dest, n);
+ }
+}
+
+
+
+
+/**
+ * Unpack image data. Apply byte swapping, byte flipping (bitmap).
+ * Return all image data in a contiguous block. This is used when we
+ * compile glDrawPixels, glTexImage, etc into a display list. We
+ * need a copy of the data in a standard format.
*/
void *
-_mesa_unpack_image( GLsizei width, GLsizei height, GLsizei depth,
+_mesa_unpack_image( GLuint dimensions,
+ GLsizei width, GLsizei height, GLsizei depth,
GLenum format, GLenum type, const GLvoid *pixels,
const struct gl_pixelstore_attrib *unpack )
{
if (width <= 0 || height <= 0 || depth <= 0)
return NULL; /* generate error later */
- if (format == GL_BITMAP) {
+ if (type == GL_BITMAP) {
bytesPerRow = (width + 7) >> 3;
- flipBytes = !unpack->LsbFirst;
+ flipBytes = unpack->LsbFirst;
swap2 = swap4 = GL_FALSE;
compsPerRow = 0;
}
else {
const GLint bytesPerPixel = _mesa_bytes_per_pixel(format, type);
- const GLint components = _mesa_components_in_format(format);
+ GLint components = _mesa_components_in_format(format);
GLint bytesPerComp;
+
+ if (_mesa_type_is_packed(type))
+ components = 1;
+
if (bytesPerPixel <= 0 || components <= 0)
return NULL; /* bad format or type. generate error later */
bytesPerRow = bytesPerPixel * width;
}
{
- GLubyte *destBuffer = MALLOC(bytesPerRow * height * depth);
+ GLubyte *destBuffer
+ = (GLubyte *) _mesa_malloc(bytesPerRow * height * depth);
GLubyte *dst;
GLint img, row;
if (!destBuffer)
dst = destBuffer;
for (img = 0; img < depth; img++) {
for (row = 0; row < height; row++) {
- const GLvoid *src = _mesa_image_address(unpack, pixels,
+ const GLvoid *src = _mesa_image_address(dimensions, unpack, pixels,
width, height, format, type, img, row, 0);
- MEMCPY(dst, src, bytesPerRow);
+
+ if ((type == GL_BITMAP) && (unpack->SkipPixels & 0x7)) {
+ GLint i;
+ flipBytes = GL_FALSE;
+ if (unpack->LsbFirst) {
+ GLubyte srcMask = 1 << (unpack->SkipPixels & 0x7);
+ GLubyte dstMask = 128;
+ const GLubyte *s = src;
+ GLubyte *d = dst;
+ *d = 0;
+ for (i = 0; i < width; i++) {
+ if (*s & srcMask) {
+ *d |= dstMask;
+ }
+ if (srcMask == 128) {
+ srcMask = 1;
+ s++;
+ } else {
+ srcMask = srcMask << 1;
+ }
+ if (dstMask == 1) {
+ dstMask = 128;
+ d++;
+ *d = 0;
+ } else {
+ dstMask = dstMask >> 1;
+ }
+ }
+ } else {
+ GLubyte srcMask = 128 >> (unpack->SkipPixels & 0x7);
+ GLubyte dstMask = 128;
+ const GLubyte *s = src;
+ GLubyte *d = dst;
+ *d = 0;
+ for (i = 0; i < width; i++) {
+ if (*s & srcMask) {
+ *d |= dstMask;
+ }
+ if (srcMask == 1) {
+ srcMask = 128;
+ s++;
+ } else {
+ srcMask = srcMask >> 1;
+ }
+ if (dstMask == 1) {
+ dstMask = 128;
+ d++;
+ *d = 0;
+ } else {
+ dstMask = dstMask >> 1;
+ }
+ }
+ }
+ } else
+ _mesa_memcpy(dst, src, bytesPerRow);
/* byte flipping/swapping */
if (flipBytes) {
flip_bytes((GLubyte *) dst, bytesPerRow);
return destBuffer;
}
}
+
+#endif /* _HAVE_FULL_GL */
+
+
+
+/**
+ * Convert an array of RGBA colors from one datatype to another.
+ * NOTE: src may equal dst. In that case, we use a temporary buffer.
+ */
+void
+_mesa_convert_colors(GLenum srcType, const GLvoid *src,
+ GLenum dstType, GLvoid *dst,
+ GLuint count, const GLubyte mask[])
+{
+ GLuint tempBuffer[MAX_WIDTH][4];
+ const GLboolean useTemp = (src == dst);
+
+ ASSERT(srcType != dstType);
+
+ switch (srcType) {
+ case GL_UNSIGNED_BYTE:
+ if (dstType == GL_UNSIGNED_SHORT) {
+ const GLubyte (*src1)[4] = (const GLubyte (*)[4]) src;
+ GLushort (*dst2)[4] = (GLushort (*)[4]) (useTemp ? tempBuffer : dst);
+ GLuint i;
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ dst2[i][RCOMP] = UBYTE_TO_USHORT(src1[i][RCOMP]);
+ dst2[i][GCOMP] = UBYTE_TO_USHORT(src1[i][GCOMP]);
+ dst2[i][BCOMP] = UBYTE_TO_USHORT(src1[i][BCOMP]);
+ dst2[i][ACOMP] = UBYTE_TO_USHORT(src1[i][ACOMP]);
+ }
+ }
+ if (useTemp)
+ _mesa_memcpy(dst, tempBuffer, count * 4 * sizeof(GLushort));
+ }
+ else {
+ const GLubyte (*src1)[4] = (const GLubyte (*)[4]) src;
+ GLfloat (*dst4)[4] = (GLfloat (*)[4]) (useTemp ? tempBuffer : dst);
+ GLuint i;
+ ASSERT(dstType == GL_FLOAT);
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ dst4[i][RCOMP] = UBYTE_TO_FLOAT(src1[i][RCOMP]);
+ dst4[i][GCOMP] = UBYTE_TO_FLOAT(src1[i][GCOMP]);
+ dst4[i][BCOMP] = UBYTE_TO_FLOAT(src1[i][BCOMP]);
+ dst4[i][ACOMP] = UBYTE_TO_FLOAT(src1[i][ACOMP]);
+ }
+ }
+ if (useTemp)
+ _mesa_memcpy(dst, tempBuffer, count * 4 * sizeof(GLfloat));
+ }
+ break;
+ case GL_UNSIGNED_SHORT:
+ if (dstType == GL_UNSIGNED_BYTE) {
+ const GLushort (*src2)[4] = (const GLushort (*)[4]) src;
+ GLubyte (*dst1)[4] = (GLubyte (*)[4]) (useTemp ? tempBuffer : dst);
+ GLuint i;
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ dst1[i][RCOMP] = USHORT_TO_UBYTE(src2[i][RCOMP]);
+ dst1[i][GCOMP] = USHORT_TO_UBYTE(src2[i][GCOMP]);
+ dst1[i][BCOMP] = USHORT_TO_UBYTE(src2[i][BCOMP]);
+ dst1[i][ACOMP] = USHORT_TO_UBYTE(src2[i][ACOMP]);
+ }
+ }
+ if (useTemp)
+ _mesa_memcpy(dst, tempBuffer, count * 4 * sizeof(GLubyte));
+ }
+ else {
+ const GLushort (*src2)[4] = (const GLushort (*)[4]) src;
+ GLfloat (*dst4)[4] = (GLfloat (*)[4]) (useTemp ? tempBuffer : dst);
+ GLuint i;
+ ASSERT(dstType == GL_FLOAT);
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ dst4[i][RCOMP] = USHORT_TO_FLOAT(src2[i][RCOMP]);
+ dst4[i][GCOMP] = USHORT_TO_FLOAT(src2[i][GCOMP]);
+ dst4[i][BCOMP] = USHORT_TO_FLOAT(src2[i][BCOMP]);
+ dst4[i][ACOMP] = USHORT_TO_FLOAT(src2[i][ACOMP]);
+ }
+ }
+ if (useTemp)
+ _mesa_memcpy(dst, tempBuffer, count * 4 * sizeof(GLfloat));
+ }
+ break;
+ case GL_FLOAT:
+ if (dstType == GL_UNSIGNED_BYTE) {
+ const GLfloat (*src4)[4] = (const GLfloat (*)[4]) src;
+ GLubyte (*dst1)[4] = (GLubyte (*)[4]) (useTemp ? tempBuffer : dst);
+ GLuint i;
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ UNCLAMPED_FLOAT_TO_UBYTE(dst1[i][RCOMP], src4[i][RCOMP]);
+ UNCLAMPED_FLOAT_TO_UBYTE(dst1[i][GCOMP], src4[i][GCOMP]);
+ UNCLAMPED_FLOAT_TO_UBYTE(dst1[i][BCOMP], src4[i][BCOMP]);
+ UNCLAMPED_FLOAT_TO_UBYTE(dst1[i][ACOMP], src4[i][ACOMP]);
+ }
+ }
+ if (useTemp)
+ _mesa_memcpy(dst, tempBuffer, count * 4 * sizeof(GLubyte));
+ }
+ else {
+ const GLfloat (*src4)[4] = (const GLfloat (*)[4]) src;
+ GLushort (*dst2)[4] = (GLushort (*)[4]) (useTemp ? tempBuffer : dst);
+ GLuint i;
+ ASSERT(dstType == GL_UNSIGNED_SHORT);
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ UNCLAMPED_FLOAT_TO_USHORT(dst2[i][RCOMP], src4[i][RCOMP]);
+ UNCLAMPED_FLOAT_TO_USHORT(dst2[i][GCOMP], src4[i][GCOMP]);
+ UNCLAMPED_FLOAT_TO_USHORT(dst2[i][BCOMP], src4[i][BCOMP]);
+ UNCLAMPED_FLOAT_TO_USHORT(dst2[i][ACOMP], src4[i][ACOMP]);
+ }
+ }
+ if (useTemp)
+ _mesa_memcpy(dst, tempBuffer, count * 4 * sizeof(GLushort));
+ }
+ break;
+ default:
+ _mesa_problem(NULL, "Invalid datatype in _mesa_convert_colors");
+ }
+}
+
+
+
+
+/**
+ * Perform basic clipping for glDrawPixels. The image's position and size
+ * and the unpack SkipPixels and SkipRows are adjusted so that the image
+ * region is entirely within the window and scissor bounds.
+ * NOTE: this will only work when glPixelZoom is (1, 1) or (1, -1).
+ * If Pixel.ZoomY is -1, *destY will be changed to be the first row which
+ * we'll actually write. Beforehand, *destY-1 is the first drawing row.
+ *
+ * \return GL_TRUE if image is ready for drawing or
+ * GL_FALSE if image was completely clipped away (draw nothing)
+ */
+GLboolean
+_mesa_clip_drawpixels(const GLcontext *ctx,
+ GLint *destX, GLint *destY,
+ GLsizei *width, GLsizei *height,
+ struct gl_pixelstore_attrib *unpack)
+{
+ const GLframebuffer *buffer = ctx->DrawBuffer;
+
+ if (unpack->RowLength == 0) {
+ unpack->RowLength = *width;
+ }
+
+ ASSERT(ctx->Pixel.ZoomX == 1.0F);
+ ASSERT(ctx->Pixel.ZoomY == 1.0F || ctx->Pixel.ZoomY == -1.0F);
+
+ /* left clipping */
+ if (*destX < buffer->_Xmin) {
+ unpack->SkipPixels += (buffer->_Xmin - *destX);
+ *width -= (buffer->_Xmin - *destX);
+ *destX = buffer->_Xmin;
+ }
+ /* right clipping */
+ if (*destX + *width > buffer->_Xmax)
+ *width -= (*destX + *width - buffer->_Xmax);
+
+ if (*width <= 0)
+ return GL_FALSE;
+
+ if (ctx->Pixel.ZoomY == 1.0F) {
+ /* bottom clipping */
+ if (*destY < buffer->_Ymin) {
+ unpack->SkipRows += (buffer->_Ymin - *destY);
+ *height -= (buffer->_Ymin - *destY);
+ *destY = buffer->_Ymin;
+ }
+ /* top clipping */
+ if (*destY + *height > buffer->_Ymax)
+ *height -= (*destY + *height - buffer->_Ymax);
+ }
+ else { /* upside down */
+ /* top clipping */
+ if (*destY > buffer->_Ymax) {
+ unpack->SkipRows += (*destY - buffer->_Ymax);
+ *height -= (*destY - buffer->_Ymax);
+ *destY = buffer->_Ymax;
+ }
+ /* bottom clipping */
+ if (*destY - *height < buffer->_Ymin)
+ *height -= (buffer->_Ymin - (*destY - *height));
+ /* adjust destY so it's the first row to write to */
+ (*destY)--;
+ }
+
+ if (*height <= 0)
+ return GL_TRUE;
+
+ return GL_TRUE;
+}
+
+
+/**
+ * Perform clipping for glReadPixels. The image's window position
+ * and size, and the pack skipPixels, skipRows and rowLength are adjusted
+ * so that the image region is entirely within the window bounds.
+ * Note: this is different from _mesa_clip_drawpixels() in that the
+ * scissor box is ignored, and we use the bounds of the current readbuffer
+ * surface.
+ *
+ * \return GL_TRUE if image is ready for drawing or
+ * GL_FALSE if image was completely clipped away (draw nothing)
+ */
+GLboolean
+_mesa_clip_readpixels(const GLcontext *ctx,
+ GLint *srcX, GLint *srcY,
+ GLsizei *width, GLsizei *height,
+ struct gl_pixelstore_attrib *pack)
+{
+ const GLframebuffer *buffer = ctx->ReadBuffer;
+
+ if (pack->RowLength == 0) {
+ pack->RowLength = *width;
+ }
+
+ /* left clipping */
+ if (*srcX < 0) {
+ pack->SkipPixels += (0 - *srcX);
+ *width -= (0 - *srcX);
+ *srcX = 0;
+ }
+ /* right clipping */
+ if (*srcX + *width > (GLsizei) buffer->Width)
+ *width -= (*srcX + *width - buffer->Width);
+
+ if (*width <= 0)
+ return GL_FALSE;
+
+ /* bottom clipping */
+ if (*srcY < 0) {
+ pack->SkipRows += (0 - *srcY);
+ *height -= (0 - *srcY);
+ *srcY = 0;
+ }
+ /* top clipping */
+ if (*srcY + *height > (GLsizei) buffer->Height)
+ *height -= (*srcY + *height - buffer->Height);
+
+ if (*height <= 0)
+ return GL_TRUE;
+
+ return GL_TRUE;
+}
+
+
+/**
+ * Clip the rectangle defined by (x, y, width, height) against the bounds
+ * specified by [xmin, xmax) and [ymin, ymax).
+ * \return GL_FALSE if rect is totally clipped, GL_TRUE otherwise.
+ */
+GLboolean
+_mesa_clip_to_region(GLint xmin, GLint ymin,
+ GLint xmax, GLint ymax,
+ GLint *x, GLint *y,
+ GLsizei *width, GLsizei *height )
+{
+ /* left clipping */
+ if (*x < xmin) {
+ *width -= (xmin - *x);
+ *x = xmin;
+ }
+
+ /* right clipping */
+ if (*x + *width > xmax)
+ *width -= (*x + *width - xmax - 1);
+
+ if (*width <= 0)
+ return GL_FALSE;
+
+ /* bottom (or top) clipping */
+ if (*y < ymin) {
+ *height -= (ymin - *y);
+ *y = ymin;
+ }
+
+ /* top (or bottom) clipping */
+ if (*y + *height > ymax)
+ *height -= (*y + *height - ymax - 1);
+
+ if (*height <= 0)
+ return GL_FALSE;
+
+ return GL_TRUE;
+}
projects / mesa.git / blobdiff