-/* $Id: texstore.c,v 1.17 2001/03/21 01:08:37 brianp Exp $ */
+/* $Id: texstore.c,v 1.45 2002/10/24 23:57:21 brianp Exp $ */
/*
* Mesa 3-D graphics library
- * Version: 3.5
+ * Version: 4.1
*
- * Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2002 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"),
* Brian Paul
*/
-
/*
- * The functions in this file are mostly related to software texture fallbacks.
- * This includes texture image transfer/packing and texel fetching.
- * Hardware drivers will likely override most of this.
+ * The GL texture image functions in teximage.c basically just do
+ * error checking and data structure allocation. They in turn call
+ * device driver functions which actually copy/convert/store the user's
+ * texture image data.
+ *
+ * However, most device drivers will be able to use the fallback functions
+ * in this file. That is, most drivers will have the following bit of
+ * code:
+ * ctx->Driver.TexImage1D = _mesa_store_teximage1d;
+ * ctx->Driver.TexImage2D = _mesa_store_teximage2d;
+ * ctx->Driver.TexImage3D = _mesa_store_teximage3d;
+ * etc...
+ *
+ * Texture image processing is actually kind of complicated. We have to do:
+ * Format/type conversions
+ * pixel unpacking
+ * pixel transfer (scale, bais, lookup, convolution!, etc)
+ *
+ * These functions can handle most everything, including processing full
+ * images and sub-images.
*/
-
+#include "glheader.h"
#include "colormac.h"
#include "context.h"
#include "convolve.h"
#include "image.h"
#include "macros.h"
-#include "mem.h"
+#include "imports.h"
+#include "texcompress.h"
#include "texformat.h"
#include "teximage.h"
#include "texstore.h"
+#include "texutil.h"
/*
* corresponding _base_ internal format: GL_ALPHA, GL_LUMINANCE,
* GL_LUMANCE_ALPHA, GL_INTENSITY, GL_RGB, or GL_RGBA. Return the
* number of components for the format. Return -1 if invalid enum.
- *
- * GH: Do we really need this? We have the number of bytes per texel
- * in the texture format structures, so why don't we just use that?
*/
static GLint
components_in_intformat( GLint format )
case GL_DEPTH_COMPONENT24_SGIX:
case GL_DEPTH_COMPONENT32_SGIX:
return 1;
+ case GL_YCBCR_MESA:
+ return 2; /* Y + (Cb or Cr) */
default:
return -1; /* error */
}
* We also take care of all image transfer operations here, including
* convolution, scale/bias, colortables, etc.
*
- * The destination texel channel type is always GLchan.
+ * The destination texel type is always GLchan.
+ * The destination texel format is one of the 6 basic types.
*
* A hardware driver may use this as a helper routine to unpack and
* apply pixel transfer ops into a temporary image buffer. Then,
*
* Input:
* dimensions - 1, 2, or 3
- * texFormat - GL_LUMINANCE, GL_INTENSITY, GL_LUMINANCE_ALPHA, GL_ALPHA,
- * GL_RGB or GL_RGBA
+ * texDestFormat - GL_LUMINANCE, GL_INTENSITY, GL_LUMINANCE_ALPHA, GL_ALPHA,
+ * GL_RGB or GL_RGBA (the destination format)
* texDestAddr - destination image address
* srcWidth, srcHeight, srcDepth - size (in pixels) of src and dest images
* dstXoffset, dstYoffset, dstZoffset - position to store the image within
* srcFormat - source image format (GL_ALPHA, GL_RED, GL_RGB, etc)
* srcType - GL_UNSIGNED_BYTE, GL_UNSIGNED_SHORT_5_6_5, GL_FLOAT, etc
* srcPacking - describes packing of incoming image.
+ * transferOps - mask of pixel transfer operations
*/
-void
-_mesa_transfer_teximage(GLcontext *ctx, GLuint dimensions,
- GLenum texFormat, GLvoid *texDestAddr,
- GLint srcWidth, GLint srcHeight, GLint srcDepth,
- GLint dstXoffset, GLint dstYoffset, GLint dstZoffset,
- GLint dstRowStride, GLint dstImageStride,
- GLenum srcFormat, GLenum srcType,
- const GLvoid *srcAddr,
- const struct gl_pixelstore_attrib *srcPacking)
+static void
+transfer_teximage(GLcontext *ctx, GLuint dimensions,
+ GLenum texDestFormat, GLvoid *texDestAddr,
+ GLint srcWidth, GLint srcHeight, GLint srcDepth,
+ GLint dstXoffset, GLint dstYoffset, GLint dstZoffset,
+ GLint dstRowStride, GLint dstImageStride,
+ GLenum srcFormat, GLenum srcType,
+ const GLvoid *srcAddr,
+ const struct gl_pixelstore_attrib *srcPacking,
+ GLuint transferOps)
{
GLint texComponents;
ASSERT(ctx);
ASSERT(dimensions >= 1 && dimensions <= 3);
+ ASSERT(texDestFormat == GL_LUMINANCE ||
+ texDestFormat == GL_INTENSITY ||
+ texDestFormat == GL_LUMINANCE_ALPHA ||
+ texDestFormat == GL_ALPHA ||
+ texDestFormat == GL_RGB ||
+ texDestFormat == GL_RGBA);
ASSERT(texDestAddr);
ASSERT(srcWidth >= 1);
ASSERT(srcHeight >= 1);
ASSERT(srcAddr);
ASSERT(srcPacking);
- texComponents = components_in_intformat(texFormat);
+ texComponents = components_in_intformat(texDestFormat);
/* try common 2D texture cases first */
- if (!ctx->_ImageTransferState && dimensions == 2 && srcType == CHAN_TYPE) {
+ if (!transferOps && dimensions == 2 && srcType == CHAN_TYPE) {
- if (srcFormat == texFormat) {
+ if (srcFormat == texDestFormat) {
/* This will cover the common GL_RGB, GL_RGBA, GL_ALPHA,
* GL_LUMINANCE_ALPHA, etc. texture formats. Use memcpy().
*/
const GLint srcRowStride = _mesa_image_row_stride(srcPacking,
srcWidth, srcFormat, srcType);
const GLint widthInBytes = srcWidth * texComponents * sizeof(GLchan);
- GLchan *dst = (GLchan *) texDestAddr + dstYoffset * dstRowStride
- + dstXoffset * texComponents;
+ GLchan *dst = (GLchan *) texDestAddr
+ + dstYoffset * (dstRowStride / sizeof(GLchan))
+ + dstXoffset * texComponents;
if (srcRowStride == widthInBytes && dstRowStride == widthInBytes) {
MEMCPY(dst, src, srcHeight * widthInBytes);
}
GLint i;
for (i = 0; i < srcHeight; i++) {
MEMCPY(dst, src, widthInBytes);
- src += srcRowStride;
- dst += dstRowStride;
+ src += (srcRowStride / sizeof(GLchan));
+ dst += (dstRowStride / sizeof(GLchan));
}
}
return; /* all done */
}
- else if (srcFormat == GL_RGBA && texFormat == GL_RGB) {
+ else if (srcFormat == GL_RGBA && texDestFormat == GL_RGB) {
/* commonly used by Quake */
const GLchan *src = (const GLchan *) _mesa_image_address(
srcPacking, srcAddr, srcWidth, srcHeight,
srcFormat, srcType, 0, 0, 0);
const GLint srcRowStride = _mesa_image_row_stride(srcPacking,
srcWidth, srcFormat, srcType);
- GLchan *dst = (GLchan *) texDestAddr + dstYoffset * dstRowStride
- + dstXoffset * texComponents;
+ GLchan *dst = (GLchan *) texDestAddr
+ + dstYoffset * (dstRowStride / sizeof(GLchan))
+ + dstXoffset * texComponents;
GLint i, j;
for (i = 0; i < srcHeight; i++) {
const GLchan *s = src;
*d++ = *s++; /*blue*/
s++; /*alpha*/
}
- src += srcRowStride;
- dst += dstRowStride;
+ src += (srcRowStride / sizeof(GLchan));
+ dst += (dstRowStride / sizeof(GLchan));
}
return; /* all done */
}
/*
* General case solutions
*/
- if (texFormat == GL_COLOR_INDEX) {
+ if (texDestFormat == GL_COLOR_INDEX) {
/* color index texture */
const GLenum texType = CHAN_TYPE;
GLint img, row;
- GLchan *dest = (GLchan *) texDestAddr + dstZoffset * dstImageStride
- + dstYoffset * dstRowStride
- + dstXoffset * texComponents;
+ GLchan *dest = (GLchan *) texDestAddr
+ + dstZoffset * (dstImageStride / sizeof(GLchan))
+ + dstYoffset * (dstRowStride / sizeof(GLchan))
+ + dstXoffset * texComponents;
for (img = 0; img < srcDepth; img++) {
GLchan *destRow = dest;
for (row = 0; row < srcHeight; row++) {
const GLvoid *src = _mesa_image_address(srcPacking,
srcAddr, srcWidth, srcHeight, srcFormat, srcType, img, row, 0);
_mesa_unpack_index_span(ctx, srcWidth, texType, destRow,
- srcType, src, srcPacking,
- ctx->_ImageTransferState);
- destRow += dstRowStride;
+ srcType, src, srcPacking, transferOps);
+ destRow += (dstRowStride / sizeof(GLchan));
}
dest += dstImageStride;
}
}
- else if (texFormat == GL_DEPTH_COMPONENT) {
+ else if (texDestFormat == GL_YCBCR_MESA) {
+ /* YCbCr texture */
+ GLint img, row;
+ GLushort *dest = (GLushort *) texDestAddr
+ + dstZoffset * (dstImageStride / sizeof(GLushort))
+ + dstYoffset * (dstRowStride / sizeof(GLushort))
+ + dstXoffset * texComponents;
+ ASSERT(ctx->Extensions.MESA_ycbcr_texture);
+ printf("copy ycbcr\n");
+ for (img = 0; img < srcDepth; img++) {
+ GLushort *destRow = dest;
+ for (row = 0; row < srcHeight; row++) {
+ const GLvoid *srcRow = _mesa_image_address(srcPacking,
+ srcAddr, srcWidth, srcHeight,
+ srcFormat, srcType, img, row, 0);
+ MEMCPY(destRow, srcRow, srcWidth * sizeof(GLushort));
+ destRow += (dstRowStride / sizeof(GLushort));
+ }
+ dest += dstImageStride / sizeof(GLushort);
+ }
+ }
+ else if (texDestFormat == GL_DEPTH_COMPONENT) {
/* Depth texture (shadow maps) */
GLint img, row;
GLubyte *dest = (GLubyte *) texDestAddr
+ dstZoffset * dstImageStride
- + dstYoffset * dstRowStride
+ + dstYoffset * (dstRowStride / sizeof(GLchan))
+ dstXoffset * texComponents;
for (img = 0; img < srcDepth; img++) {
GLubyte *destRow = dest;
srcAddr, srcWidth, srcHeight, srcFormat, srcType, img, row, 0);
_mesa_unpack_depth_span(ctx, srcWidth, (GLfloat *) destRow,
srcType, src, srcPacking);
- destRow += dstRowStride;
+ destRow += (dstRowStride / sizeof(GLchan));
}
dest += dstImageStride;
}
srcFormat, srcType, img, row, 0);
_mesa_unpack_float_color_span(ctx, srcWidth, GL_RGBA, dstf,
srcFormat, srcType, src, srcPacking,
- ctx->_ImageTransferState & IMAGE_PRE_CONVOLUTION_BITS,
+ transferOps & IMAGE_PRE_CONVOLUTION_BITS,
GL_TRUE);
dstf += srcWidth * 4;
}
/* packing and transfer ops after convolution */
srcf = convImage;
- dest = (GLchan *) texDestAddr + (dstZoffset + img) * dstImageStride
- + dstYoffset * dstRowStride;
+ dest = (GLchan *) texDestAddr
+ + (dstZoffset + img) * (dstImageStride / sizeof(GLchan))
+ + dstYoffset * (dstRowStride / sizeof(GLchan));
for (row = 0; row < convHeight; row++) {
_mesa_pack_float_rgba_span(ctx, convWidth,
(const GLfloat (*)[4]) srcf,
- texFormat, CHAN_TYPE,
+ texDestFormat, CHAN_TYPE,
dest, &_mesa_native_packing,
- ctx->_ImageTransferState
+ transferOps
& IMAGE_POST_CONVOLUTION_BITS);
srcf += convWidth * 4;
- dest += dstRowStride;
+ dest += (dstRowStride / sizeof(GLchan));
}
}
* no convolution
*/
GLint img, row;
- GLchan *dest = (GLchan *) texDestAddr + dstZoffset * dstImageStride
- + dstYoffset * dstRowStride
- + dstXoffset * texComponents;
+ GLchan *dest = (GLchan *) texDestAddr
+ + dstZoffset * (dstImageStride / sizeof(GLchan))
+ + dstYoffset * (dstRowStride / sizeof(GLchan))
+ + dstXoffset * texComponents;
for (img = 0; img < srcDepth; img++) {
GLchan *destRow = dest;
for (row = 0; row < srcHeight; row++) {
const GLvoid *srcRow = _mesa_image_address(srcPacking,
srcAddr, srcWidth, srcHeight,
srcFormat, srcType, img, row, 0);
- _mesa_unpack_chan_color_span(ctx, srcWidth, texFormat, destRow,
- srcFormat, srcType, srcRow, srcPacking,
- ctx->_ImageTransferState);
- destRow += dstRowStride;
+ _mesa_unpack_chan_color_span(ctx, srcWidth, texDestFormat,
+ destRow, srcFormat, srcType, srcRow,
+ srcPacking, transferOps);
+ destRow += (dstRowStride / sizeof(GLchan));
}
- dest += dstImageStride;
+ dest += dstImageStride / sizeof(GLchan);
}
}
}
/*
- * This is the software fallback for Driver.TexImage1D().
+ * Transfer a texture image from user space to <destAddr> applying all
+ * needed image transfer operations and storing the result in the format
+ * specified by <dstFormat>. <dstFormat> may be any format from texformat.h.
+ * Input:
+ * dimensions - 1, 2 or 3
+ * baseInternalFormat - base format of the internal texture format
+ * specified by the user. This is very important, see below.
+ * dstFormat - destination image format
+ * dstAddr - destination address
+ * srcWidth, srcHeight, srcDepth - size of source iamge
+ * dstX/Y/Zoffset - as specified by glTexSubImage
+ * dstRowStride - stride between dest rows in bytes
+ * dstImageStride - stride between dest images in bytes
+ * srcFormat, srcType - incoming image format and datatype
+ * srcAddr - source image address
+ * srcPacking - packing params of source image
+ *
+ * XXX this function is a bit more complicated than it should be. If
+ * _mesa_convert_texsubimage[123]d could handle any dest/source formats
+ * or if transfer_teximage() could store in any MESA_FORMAT_* format, we
+ * could simplify things here.
+ */
+void
+_mesa_transfer_teximage(GLcontext *ctx, GLuint dimensions,
+ GLenum baseInternalFormat,
+ const struct gl_texture_format *dstFormat,
+ GLvoid *dstAddr,
+ GLint srcWidth, GLint srcHeight, GLint srcDepth,
+ GLint dstXoffset, GLint dstYoffset, GLint dstZoffset,
+ GLint dstRowStride, GLint dstImageStride,
+ GLenum srcFormat, GLenum srcType,
+ const GLvoid *srcAddr,
+ const struct gl_pixelstore_attrib *srcPacking)
+{
+ const GLint dstRowStridePixels = dstRowStride / dstFormat->TexelBytes;
+ const GLint dstImageStridePixels = dstImageStride / dstFormat->TexelBytes;
+ GLboolean makeTemp;
+ GLuint transferOps = ctx->_ImageTransferState;
+ GLboolean freeSourceData = GL_FALSE;
+ GLint postConvWidth = srcWidth, postConvHeight = srcHeight;
+
+ assert(baseInternalFormat > 0);
+ ASSERT(baseInternalFormat == GL_LUMINANCE ||
+ baseInternalFormat == GL_INTENSITY ||
+ baseInternalFormat == GL_LUMINANCE_ALPHA ||
+ baseInternalFormat == GL_ALPHA ||
+ baseInternalFormat == GL_RGB ||
+ baseInternalFormat == GL_RGBA);
+
+ if (transferOps & IMAGE_CONVOLUTION_BIT) {
+ _mesa_adjust_image_for_convolution(ctx, dimensions, &postConvWidth,
+ &postConvHeight);
+ }
+
+ /*
+ * Consider this scenario: The user's source image is GL_RGB and the
+ * requested internal format is GL_LUMINANCE. Now suppose the device
+ * driver doesn't support GL_LUMINANCE and instead uses RGB16 as the
+ * texture format. In that case we still need to do an intermediate
+ * conversion to luminance format so that the incoming red channel gets
+ * replicated into the dest red, green and blue channels. The following
+ * code takes care of that.
+ */
+ if (dstFormat->BaseFormat != baseInternalFormat) {
+ /* Allocate storage for temporary image in the baseInternalFormat */
+ const GLint texelSize = _mesa_components_in_format(baseInternalFormat)
+ * sizeof(GLchan);
+ const GLint bytes = texelSize * postConvWidth * postConvHeight *srcDepth;
+ const GLint tmpRowStride = texelSize * postConvWidth;
+ const GLint tmpImgStride = texelSize * postConvWidth * postConvHeight;
+ GLvoid *tmpImage = MALLOC(bytes);
+ if (!tmpImage)
+ return;
+ transfer_teximage(ctx, dimensions, baseInternalFormat, tmpImage,
+ srcWidth, srcHeight, srcDepth,
+ 0, 0, 0, /* x/y/zoffset */
+ tmpRowStride, tmpImgStride,
+ srcFormat, srcType, srcAddr, srcPacking, transferOps);
+
+ /* this is our new source image */
+ srcWidth = postConvWidth;
+ srcHeight = postConvHeight;
+ srcFormat = baseInternalFormat;
+ srcType = CHAN_TYPE;
+ srcAddr = tmpImage;
+ srcPacking = &_mesa_native_packing;
+ freeSourceData = GL_TRUE;
+ transferOps = 0; /* image transfer ops were completed */
+ }
+
+ /* Let the optimized tex conversion functions take a crack at the
+ * image conversion if the dest format is a h/w format.
+ */
+ if (_mesa_is_hardware_tex_format(dstFormat)) {
+ if (transferOps) {
+ makeTemp = GL_TRUE;
+ }
+ else {
+ if (dimensions == 1) {
+ makeTemp = !_mesa_convert_texsubimage1d(dstFormat->MesaFormat,
+ dstXoffset,
+ srcWidth,
+ srcFormat, srcType,
+ srcPacking, srcAddr,
+ dstAddr);
+ }
+ else if (dimensions == 2) {
+ makeTemp = !_mesa_convert_texsubimage2d(dstFormat->MesaFormat,
+ dstXoffset, dstYoffset,
+ srcWidth, srcHeight,
+ dstRowStridePixels,
+ srcFormat, srcType,
+ srcPacking, srcAddr,
+ dstAddr);
+ }
+ else {
+ assert(dimensions == 3);
+ makeTemp = !_mesa_convert_texsubimage3d(dstFormat->MesaFormat,
+ dstXoffset, dstYoffset, dstZoffset,
+ srcWidth, srcHeight, srcDepth,
+ dstRowStridePixels, dstImageStridePixels,
+ srcFormat, srcType,
+ srcPacking, srcAddr, dstAddr);
+ }
+ if (!makeTemp) {
+ /* all done! */
+ if (freeSourceData)
+ FREE((void *) srcAddr);
+ return;
+ }
+ }
+ }
+ else {
+ /* software texture format */
+ makeTemp = GL_FALSE;
+ }
+
+ if (makeTemp) {
+ GLint postConvWidth = srcWidth, postConvHeight = srcHeight;
+ GLenum tmpFormat;
+ GLuint tmpComps, tmpTexelSize;
+ GLint tmpRowStride, tmpImageStride;
+ GLubyte *tmpImage;
+
+ if (transferOps & IMAGE_CONVOLUTION_BIT) {
+ _mesa_adjust_image_for_convolution(ctx, dimensions, &postConvWidth,
+ &postConvHeight);
+ }
+
+ tmpFormat = dstFormat->BaseFormat;
+ tmpComps = _mesa_components_in_format(tmpFormat);
+ tmpTexelSize = tmpComps * sizeof(GLchan);
+ tmpRowStride = postConvWidth * tmpTexelSize;
+ tmpImageStride = postConvWidth * postConvHeight * tmpTexelSize;
+ tmpImage = (GLubyte *) MALLOC(postConvWidth * postConvHeight *
+ srcDepth * tmpTexelSize);
+ if (!tmpImage) {
+ if (freeSourceData)
+ FREE((void *) srcAddr);
+ return;
+ }
+
+ transfer_teximage(ctx, dimensions, tmpFormat, tmpImage,
+ srcWidth, srcHeight, srcDepth,
+ 0, 0, 0, /* x/y/zoffset */
+ tmpRowStride, tmpImageStride,
+ srcFormat, srcType, srcAddr, srcPacking, transferOps);
+
+ if (freeSourceData)
+ FREE((void *) srcAddr);
+
+ /* the temp image is our new source image */
+ srcWidth = postConvWidth;
+ srcHeight = postConvHeight;
+ srcFormat = tmpFormat;
+ srcType = CHAN_TYPE;
+ srcAddr = tmpImage;
+ srcPacking = &_mesa_native_packing;
+ freeSourceData = GL_TRUE;
+ }
+
+ if (_mesa_is_hardware_tex_format(dstFormat)) {
+ assert(makeTemp);
+ if (dimensions == 1) {
+ GLboolean b;
+ b = _mesa_convert_texsubimage1d(dstFormat->MesaFormat,
+ dstXoffset,
+ srcWidth,
+ srcFormat, srcType,
+ srcPacking, srcAddr,
+ dstAddr);
+ assert(b);
+ }
+ else if (dimensions == 2) {
+ GLboolean b;
+ b = _mesa_convert_texsubimage2d(dstFormat->MesaFormat,
+ dstXoffset, dstYoffset,
+ srcWidth, srcHeight,
+ dstRowStridePixels,
+ srcFormat, srcType,
+ srcPacking, srcAddr,
+ dstAddr);
+ assert(b);
+ }
+ else {
+ GLboolean b;
+ b = _mesa_convert_texsubimage3d(dstFormat->MesaFormat,
+ dstXoffset, dstYoffset, dstZoffset,
+ srcWidth, srcHeight, srcDepth,
+ dstRowStridePixels, dstImageStridePixels,
+ srcFormat, srcType,
+ srcPacking, srcAddr, dstAddr);
+ assert(b);
+ }
+ }
+ else {
+ /* software format */
+ assert(!makeTemp);
+ transfer_teximage(ctx, dimensions, dstFormat->BaseFormat, dstAddr,
+ srcWidth, srcHeight, srcDepth,
+ dstXoffset, dstYoffset, dstZoffset,
+ dstRowStride, dstImageStride,
+ srcFormat, srcType, srcAddr, srcPacking, transferOps);
+ }
+
+ if (freeSourceData)
+ FREE((void *) srcAddr); /* the temp image */
+}
+
+
+
+/**
+ * Given a user's uncompressed texture image, this function takes care of
+ * pixel unpacking, pixel transfer, format conversion and compression.
+ */
+static void
+transfer_compressed_teximage(GLcontext *ctx, GLuint dimensions,
+ GLsizei width, GLsizei height, GLsizei depth,
+ GLenum srcFormat, GLenum srcType,
+ const struct gl_pixelstore_attrib *unpacking,
+ const GLvoid *source,
+ const struct gl_texture_format *dstFormat,
+ GLubyte *dest,
+ GLint dstRowStride)
+{
+ GLchan *tempImage = NULL;
+ GLint srcRowStride;
+ GLenum baseFormat;
+
+ ASSERT(dimensions == 2);
+ /* TexelBytes is zero if and only if it's a compressed format */
+ ASSERT(dstFormat->TexelBytes == 0);
+
+ baseFormat = dstFormat->BaseFormat;
+
+ if (srcFormat != baseFormat || srcType != CHAN_TYPE ||
+ ctx->_ImageTransferState != 0 || unpacking->SwapBytes) {
+ /* need to convert user's image to texImage->Format, GLchan */
+ GLint comps = components_in_intformat(baseFormat);
+ GLint postConvWidth = width, postConvHeight = height;
+
+ /* XXX convolution untested */
+ if (ctx->_ImageTransferState & IMAGE_CONVOLUTION_BIT) {
+ _mesa_adjust_image_for_convolution(ctx, dimensions, &postConvWidth,
+ &postConvHeight);
+ }
+
+ tempImage = (GLchan*) MALLOC(width * height * comps * sizeof(GLchan));
+ if (!tempImage) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage2D");
+ return;
+ }
+ transfer_teximage(ctx, dimensions,
+ baseFormat, /* dest format */
+ tempImage, /* dst address */
+ width, height, depth, /* src size */
+ 0, 0, 0, /* x/y/zoffset */
+ comps * width, /* dst row stride */
+ comps * width * height, /* dst image stride */
+ srcFormat, srcType, /* src format, type */
+ source, unpacking, /* src and src packing */
+ ctx->_ImageTransferState);
+ source = tempImage;
+ width = postConvWidth;
+ height = postConvHeight;
+ srcRowStride = width;
+ }
+ else {
+ if (unpacking->RowLength)
+ srcRowStride = unpacking->RowLength;
+ else
+ srcRowStride = width;
+ }
+
+ _mesa_compress_teximage(ctx, width, height, baseFormat,
+ (const GLchan *) source, srcRowStride,
+ dstFormat, dest, dstRowStride);
+ if (tempImage) {
+ FREE(tempImage);
+ }
+}
+
+
+
+/*
+ * This is the software fallback for Driver.TexImage1D()
+ * and Driver.CopyTexImage2D().
* The texture image type will be GLchan.
* The texture image format will be GL_COLOR_INDEX, GL_INTENSITY,
* GL_LUMINANCE, GL_LUMINANCE_ALPHA, GL_ALPHA, GL_RGB or GL_RGBA.
- *
*/
void
_mesa_store_teximage1d(GLcontext *ctx, GLenum target, GLint level,
struct gl_texture_image *texImage)
{
GLint postConvWidth = width;
+ GLint texelBytes, sizeInBytes;
if (ctx->_ImageTransferState & IMAGE_CONVOLUTION_BIT) {
_mesa_adjust_image_for_convolution(ctx, 1, &postConvWidth, NULL);
}
- /* setup the teximage struct's fields */
- _mesa_init_tex_format( ctx, internalFormat, texImage );
+ /* choose the texture format */
+ assert(ctx->Driver.ChooseTextureFormat);
+ texImage->TexFormat = (*ctx->Driver.ChooseTextureFormat)(ctx,
+ internalFormat, format, type);
+ assert(texImage->TexFormat);
texImage->FetchTexel = texImage->TexFormat->FetchTexel1D;
+ texelBytes = texImage->TexFormat->TexelBytes;
+
/* allocate memory */
- texImage->Data = (GLchan *) MALLOC(postConvWidth *
- texImage->TexFormat->TexelBytes);
- if (!texImage->Data)
- return; /* out of memory */
+ if (texImage->IsCompressed)
+ sizeInBytes = texImage->CompressedSize;
+ else
+ sizeInBytes = postConvWidth * texelBytes;
+ texImage->Data = MESA_PBUFFER_ALLOC(sizeInBytes);
+ if (!texImage->Data) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage1D");
+ return;
+ }
+
+ if (!pixels)
+ return;
/* unpack image, apply transfer ops and store in texImage->Data */
- _mesa_transfer_teximage(ctx, 1, texImage->Format, texImage->Data,
- width, 1, 1, 0, 0, 0,
- 0, /* dstRowStride */
- 0, /* dstImageStride */
- format, type, pixels, packing);
+ if (texImage->IsCompressed) {
+ GLint dstRowStride = _mesa_compressed_row_stride(texImage->IntFormat,
+ width);
+ transfer_compressed_teximage(ctx, 1, width, 1, 1,
+ format, type, packing,
+ pixels, texImage->TexFormat,
+ (GLubyte *) texImage->Data, dstRowStride);
+ }
+ else {
+ _mesa_transfer_teximage(ctx, 1,
+ texImage->Format, /* base format */
+ texImage->TexFormat, texImage->Data,
+ width, 1, 1, /* src size */
+ 0, 0, 0, /* dstX/Y/Zoffset */
+ 0, /* dstRowStride */
+ 0, /* dstImageStride */
+ format, type, pixels, packing);
+ }
+
+ /* GL_SGIS_generate_mipmap */
+ if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
+ _mesa_generate_mipmap(ctx, target,
+ &ctx->Texture.Unit[ctx->Texture.CurrentUnit],
+ texObj);
+ }
}
/*
- * This is the software fallback for Driver.TexImage2D().
+ * This is the software fallback for Driver.TexImage2D()
+ * and Driver.CopyTexImage2D().
* The texture image type will be GLchan.
* The texture image format will be GL_COLOR_INDEX, GL_INTENSITY,
* GL_LUMINANCE, GL_LUMINANCE_ALPHA, GL_ALPHA, GL_RGB or GL_RGBA.
- *
*/
void
_mesa_store_teximage2d(GLcontext *ctx, GLenum target, GLint level,
struct gl_texture_image *texImage)
{
GLint postConvWidth = width, postConvHeight = height;
- GLint texelBytes;
+ GLint texelBytes, sizeInBytes;
if (ctx->_ImageTransferState & IMAGE_CONVOLUTION_BIT) {
_mesa_adjust_image_for_convolution(ctx, 2, &postConvWidth,
&postConvHeight);
}
- /* setup the teximage struct's fields */
- _mesa_init_tex_format( ctx, internalFormat, texImage );
+ /* choose the texture format */
+ assert(ctx->Driver.ChooseTextureFormat);
+ texImage->TexFormat = (*ctx->Driver.ChooseTextureFormat)(ctx,
+ internalFormat, format, type);
+ assert(texImage->TexFormat);
texImage->FetchTexel = texImage->TexFormat->FetchTexel2D;
texelBytes = texImage->TexFormat->TexelBytes;
/* allocate memory */
- texImage->Data = (GLchan *) MALLOC(postConvWidth * postConvHeight *
- texelBytes);
- if (!texImage->Data)
- return; /* out of memory */
+ if (texImage->IsCompressed)
+ sizeInBytes = texImage->CompressedSize;
+ else
+ sizeInBytes = postConvWidth * postConvHeight * texelBytes;
+ texImage->Data = MESA_PBUFFER_ALLOC(sizeInBytes);
+ if (!texImage->Data) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage2D");
+ return;
+ }
+
+ if (!pixels)
+ return;
/* unpack image, apply transfer ops and store in texImage->Data */
- _mesa_transfer_teximage(ctx, 2, texImage->Format, texImage->Data,
- width, height, 1, 0, 0, 0,
- texImage->Width * texelBytes,
- 0, /* dstImageStride */
- format, type, pixels, packing);
+ if (texImage->IsCompressed) {
+ GLint dstRowStride = _mesa_compressed_row_stride(texImage->IntFormat,
+ width);
+ transfer_compressed_teximage(ctx, 2, width, height, 1,
+ format, type, packing,
+ pixels, texImage->TexFormat,
+ (GLubyte *) texImage->Data, dstRowStride);
+ }
+ else {
+ _mesa_transfer_teximage(ctx, 2,
+ texImage->Format,
+ texImage->TexFormat, texImage->Data,
+ width, height, 1, /* src size */
+ 0, 0, 0, /* dstX/Y/Zoffset */
+ texImage->Width * texelBytes, /* dstRowStride */
+ 0, /* dstImageStride */
+ format, type, pixels, packing);
+ }
+
+ /* GL_SGIS_generate_mipmap */
+ if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
+ _mesa_generate_mipmap(ctx, target,
+ &ctx->Texture.Unit[ctx->Texture.CurrentUnit],
+ texObj);
+ }
}
/*
- * This is the software fallback for Driver.TexImage3D().
+ * This is the software fallback for Driver.TexImage3D()
+ * and Driver.CopyTexImage3D().
* The texture image type will be GLchan.
* The texture image format will be GL_COLOR_INDEX, GL_INTENSITY,
* GL_LUMINANCE, GL_LUMINANCE_ALPHA, GL_ALPHA, GL_RGB or GL_RGBA.
- *
*/
void
_mesa_store_teximage3d(GLcontext *ctx, GLenum target, GLint level,
struct gl_texture_object *texObj,
struct gl_texture_image *texImage)
{
- GLint texelBytes;
+ GLint texelBytes, sizeInBytes;
- /* setup the teximage struct's fields */
- _mesa_init_tex_format( ctx, internalFormat, texImage );
+ /* choose the texture format */
+ assert(ctx->Driver.ChooseTextureFormat);
+ texImage->TexFormat = (*ctx->Driver.ChooseTextureFormat)(ctx,
+ internalFormat, format, type);
+ assert(texImage->TexFormat);
texImage->FetchTexel = texImage->TexFormat->FetchTexel3D;
texelBytes = texImage->TexFormat->TexelBytes;
/* allocate memory */
- texImage->Data = (GLchan *) MALLOC(width * height * depth * texelBytes);
- if (!texImage->Data)
- return; /* out of memory */
+ if (texImage->IsCompressed)
+ sizeInBytes = texImage->CompressedSize;
+ else
+ sizeInBytes = width * height * depth * texelBytes;
+ texImage->Data = MESA_PBUFFER_ALLOC(sizeInBytes);
+ if (!texImage->Data) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage3D");
+ return;
+ }
+
+ if (!pixels)
+ return;
/* unpack image, apply transfer ops and store in texImage->Data */
- _mesa_transfer_teximage(ctx, 3, texImage->Format, texImage->Data,
- width, height, depth, 0, 0, 0,
- texImage->Width * texelBytes,
- texImage->Width * texImage->Height * texelBytes,
- format, type, pixels, packing);
+ if (texImage->IsCompressed) {
+ GLint dstRowStride = _mesa_compressed_row_stride(texImage->IntFormat,
+ width);
+ transfer_compressed_teximage(ctx, 3, width, height, depth,
+ format, type, packing,
+ pixels, texImage->TexFormat,
+ (GLubyte *) texImage->Data, dstRowStride);
+ }
+ else {
+ _mesa_transfer_teximage(ctx, 3,
+ texImage->Format,
+ texImage->TexFormat, texImage->Data,
+ width, height, depth, /* src size */
+ 0, 0, 0, /* dstX/Y/Zoffset */
+ texImage->Width * texelBytes, /* dstRowStride */
+ texImage->Width * texImage->Height * texelBytes,
+ format, type, pixels, packing);
+ }
+
+ /* GL_SGIS_generate_mipmap */
+ if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
+ _mesa_generate_mipmap(ctx, target,
+ &ctx->Texture.Unit[ctx->Texture.CurrentUnit],
+ texObj);
+ }
}
/*
- * This is the software fallback for Driver.TexSubImage1D().
+ * This is the software fallback for Driver.TexSubImage1D()
+ * and Driver.CopyTexSubImage1D().
*/
void
_mesa_store_texsubimage1d(GLcontext *ctx, GLenum target, GLint level,
struct gl_texture_object *texObj,
struct gl_texture_image *texImage)
{
- _mesa_transfer_teximage(ctx, 1, texImage->Format, texImage->Data,
- width, 1, 1, /* src size */
- xoffset, 0, 0, /* dest offsets */
- 0, /* dstRowStride */
- 0, /* dstImageStride */
- format, type, pixels, packing);
+ if (texImage->IsCompressed) {
+ GLint dstRowStride = _mesa_compressed_row_stride(texImage->IntFormat,
+ texImage->Width);
+ GLubyte *dest = _mesa_compressed_image_address(xoffset, 0, 0,
+ texImage->IntFormat,
+ texImage->Width,
+ texImage->Data);
+ transfer_compressed_teximage(ctx, 1, /* dimensions */
+ width, 1, 1, /* size to replace */
+ format, type, /* source format/type */
+ packing, /* source packing */
+ pixels, /* source data */
+ texImage->TexFormat,/* dest format */
+ dest, dstRowStride);
+ }
+ else {
+ _mesa_transfer_teximage(ctx, 1,
+ texImage->Format,
+ texImage->TexFormat, texImage->Data,
+ width, 1, 1, /* src size */
+ xoffset, 0, 0, /* dest offsets */
+ 0, /* dstRowStride */
+ 0, /* dstImageStride */
+ format, type, pixels, packing);
+ }
+
+ /* GL_SGIS_generate_mipmap */
+ if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
+ _mesa_generate_mipmap(ctx, target,
+ &ctx->Texture.Unit[ctx->Texture.CurrentUnit],
+ texObj);
+ }
}
+
/*
- * This is the software fallback for Driver.TexSubImage2D().
+ * This is the software fallback for Driver.TexSubImage2D()
+ * and Driver.CopyTexSubImage2D().
*/
void
_mesa_store_texsubimage2d(GLcontext *ctx, GLenum target, GLint level,
struct gl_texture_object *texObj,
struct gl_texture_image *texImage)
{
- const GLint components = components_in_intformat(texImage->IntFormat);
- const GLint compSize = _mesa_sizeof_type(texImage->Type);
- _mesa_transfer_teximage(ctx, 2, texImage->Format, texImage->Data,
- width, height, 1, /* src size */
- xoffset, yoffset, 0, /* dest offsets */
- texImage->Width * components * compSize,
- 0, /* dstImageStride */
- format, type, pixels, packing);
+ if (texImage->IsCompressed) {
+ GLint dstRowStride = _mesa_compressed_row_stride(texImage->IntFormat,
+ texImage->Width);
+ GLubyte *dest = _mesa_compressed_image_address(xoffset, yoffset, 0,
+ texImage->IntFormat,
+ texImage->Width,
+ texImage->Data);
+ transfer_compressed_teximage(ctx, 2, /* dimensions */
+ width, height, 1, /* size to replace */
+ format, type, /* source format/type */
+ packing, /* source packing */
+ pixels, /* source data */
+ texImage->TexFormat,/* dest format */
+ dest, dstRowStride);
+ }
+ else {
+ _mesa_transfer_teximage(ctx, 2,
+ texImage->Format,
+ texImage->TexFormat, texImage->Data,
+ width, height, 1, /* src size */
+ xoffset, yoffset, 0, /* dest offsets */
+ texImage->Width *texImage->TexFormat->TexelBytes,
+ 0, /* dstImageStride */
+ format, type, pixels, packing);
+ }
+
+ /* GL_SGIS_generate_mipmap */
+ if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
+ _mesa_generate_mipmap(ctx, target,
+ &ctx->Texture.Unit[ctx->Texture.CurrentUnit],
+ texObj);
+ }
}
/*
* This is the software fallback for Driver.TexSubImage3D().
+ * and Driver.CopyTexSubImage3D().
*/
void
_mesa_store_texsubimage3d(GLcontext *ctx, GLenum target, GLint level,
struct gl_texture_object *texObj,
struct gl_texture_image *texImage)
{
- const GLint components = components_in_intformat(texImage->IntFormat);
- const GLint compSize = _mesa_sizeof_type(texImage->Type);
- _mesa_transfer_teximage(ctx, 3, texImage->Format, texImage->Data,
+ if (texImage->IsCompressed) {
+ GLint dstRowStride = _mesa_compressed_row_stride(texImage->IntFormat,
+ texImage->Width);
+ GLubyte *dest = _mesa_compressed_image_address(xoffset, yoffset, zoffset,
+ texImage->IntFormat,
+ texImage->Width,
+ texImage->Data);
+ transfer_compressed_teximage(ctx, 3, /* dimensions */
+ width, height, depth,/* size to replace */
+ format, type, /* source format/type */
+ packing, /* source packing */
+ pixels, /* source data */
+ texImage->TexFormat,/* dest format */
+ dest, dstRowStride);
+ }
+ else {
+ const GLint texelBytes = texImage->TexFormat->TexelBytes;
+ _mesa_transfer_teximage(ctx, 3,
+ texImage->Format,
+ texImage->TexFormat, texImage->Data,
width, height, depth, /* src size */
xoffset, yoffset, xoffset, /* dest offsets */
- texImage->Width * components * compSize,
- texImage->Width * texImage->Height * components
- * compSize,
+ texImage->Width * texelBytes, /* dst row stride */
+ texImage->Width * texImage->Height * texelBytes,
format, type, pixels, packing);
+ }
+
+ /* GL_SGIS_generate_mipmap */
+ if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
+ _mesa_generate_mipmap(ctx, target,
+ &ctx->Texture.Unit[ctx->Texture.CurrentUnit],
+ texObj);
+ }
}
struct gl_texture_object *texObj,
struct gl_texture_image *texImage)
{
- /* Nothing here.
- * The device driver has to do it all.
- */
+ /* this space intentionally left blank */
}
struct gl_texture_object *texObj,
struct gl_texture_image *texImage)
{
- /* Nothing here.
- * The device driver has to do it all.
+ /* This is pretty simple, basically just do a memcpy without worrying
+ * about the usual image unpacking or image transfer operations.
*/
+ ASSERT(texObj);
+ ASSERT(texImage);
+ ASSERT(texImage->Width > 0);
+ ASSERT(texImage->Height > 0);
+ ASSERT(texImage->Depth == 1);
+ ASSERT(texImage->Data == NULL); /* was freed in glCompressedTexImage2DARB */
+
+ /* choose the texture format */
+ assert(ctx->Driver.ChooseTextureFormat);
+ texImage->TexFormat = (*ctx->Driver.ChooseTextureFormat)(ctx,
+ internalFormat, 0, 0);
+ assert(texImage->TexFormat);
+ texImage->FetchTexel = texImage->TexFormat->FetchTexel2D;
+
+ /* allocate storage */
+ texImage->Data = MESA_PBUFFER_ALLOC(imageSize);
+ if (!texImage->Data) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCompressedTexImage2DARB");
+ return;
+ }
+
+ /* copy the data */
+ ASSERT(texImage->CompressedSize == imageSize);
+ MEMCPY(texImage->Data, data, imageSize);
}
struct gl_texture_object *texObj,
struct gl_texture_image *texImage)
{
- /* Nothing here.
- * The device driver has to do it all.
- */
+ /* this space intentionally left blank */
}
+/**
+ * Fallback for Driver.CompressedTexSubImage1D()
+ */
+void
+_mesa_store_compressed_texsubimage1d(GLcontext *ctx, GLenum target,
+ GLint level,
+ GLint xoffset, GLsizei width,
+ GLenum format,
+ GLsizei imageSize, const GLvoid *data,
+ struct gl_texture_object *texObj,
+ struct gl_texture_image *texImage)
+{
+ /* this space intentionally left blank */
+}
+
+
+/**
+ * Fallback for Driver.CompressedTexSubImage2D()
+ */
+void
+_mesa_store_compressed_texsubimage2d(GLcontext *ctx, GLenum target,
+ GLint level,
+ GLint xoffset, GLint yoffset,
+ GLsizei width, GLsizei height,
+ GLenum format,
+ GLsizei imageSize, const GLvoid *data,
+ struct gl_texture_object *texObj,
+ struct gl_texture_image *texImage)
+{
+ GLint bytesPerRow, destRowStride, srcRowStride;
+ GLint i, rows;
+ GLubyte *dest;
+ const GLubyte *src;
+
+ /* these should have been caught sooner */
+ ASSERT((width & 3) == 0 || width == 2 || width == 1);
+ ASSERT((height & 3) == 0 || height == 2 || height == 1);
+ ASSERT((xoffset & 3) == 0);
+ ASSERT((yoffset & 3) == 0);
+
+ srcRowStride = _mesa_compressed_row_stride(texImage->IntFormat, width);
+ src = (const GLubyte *) data;
+
+ destRowStride = _mesa_compressed_row_stride(texImage->IntFormat,
+ texImage->Width);
+ dest = _mesa_compressed_image_address(xoffset, yoffset, 0,
+ texImage->IntFormat,
+ texImage->Width, texImage->Data);
+
+ bytesPerRow = srcRowStride;
+ rows = height / 4;
+
+ for (i = 0; i < rows; i++) {
+ MEMCPY(dest, src, bytesPerRow);
+ dest += destRowStride;
+ src += srcRowStride;
+ }
+}
+
+
+/**
+ * Fallback for Driver.CompressedTexSubImage3D()
+ */
+void
+_mesa_store_compressed_texsubimage3d(GLcontext *ctx, GLenum target,
+ GLint level,
+ GLint xoffset, GLint yoffset, GLint zoffset,
+ GLsizei width, GLsizei height, GLsizei depth,
+ GLenum format,
+ GLsizei imageSize, const GLvoid *data,
+ struct gl_texture_object *texObj,
+ struct gl_texture_image *texImage)
+{
+ /* this space intentionally left blank */
+}
+
+
/* We always pass.
* The core Mesa code will have already tested the image size, etc.
- * Drivers may have more stringent texture limits to enforce and will
+ * If a driver has more stringent texture limits to enforce it will
* have to override this function.
*/
- /* setup the teximage struct's fields */
- _mesa_init_tex_format( ctx, internalFormat, texImage );
+ /* choose the texture format */
+ assert(ctx->Driver.ChooseTextureFormat);
+ texImage->TexFormat = (*ctx->Driver.ChooseTextureFormat)(ctx,
+ internalFormat, format, type);
+ assert(texImage->TexFormat);
return GL_TRUE;
}
+
+
+
+/*
+ * Average together two rows of a source image to produce a single new
+ * row in the dest image. It's legal for the two source rows to point
+ * to the same data. The source width must be equal to either the
+ * dest width or two times the dest width.
+ */
+static void
+do_row(const struct gl_texture_format *format, GLint srcWidth,
+ const GLvoid *srcRowA, const GLvoid *srcRowB,
+ GLint dstWidth, GLvoid *dstRow)
+{
+ const GLuint k0 = (srcWidth == dstWidth) ? 0 : 1;
+ const GLuint colStride = (srcWidth == dstWidth) ? 1 : 2;
+
+ assert(srcWidth == dstWidth || srcWidth == 2 * dstWidth);
+
+ switch (format->MesaFormat) {
+ case MESA_FORMAT_RGBA:
+ {
+ GLuint i, j, k;
+ const GLchan (*rowA)[4] = (const GLchan (*)[4]) srcRowA;
+ const GLchan (*rowB)[4] = (const GLchan (*)[4]) srcRowB;
+ GLchan (*dst)[4] = (GLchan (*)[4]) dstRow;
+ for (i = j = 0, k = k0; i < (GLuint) dstWidth;
+ i++, j += colStride, k += colStride) {
+ dst[i][0] = (rowA[j][0] + rowA[k][0] +
+ rowB[j][0] + rowB[k][0]) / 4;
+ dst[i][1] = (rowA[j][1] + rowA[k][1] +
+ rowB[j][1] + rowB[k][1]) / 4;
+ dst[i][2] = (rowA[j][2] + rowA[k][2] +
+ rowB[j][2] + rowB[k][2]) / 4;
+ dst[i][3] = (rowA[j][3] + rowA[k][3] +
+ rowB[j][3] + rowB[k][3]) / 4;
+ }
+ }
+ return;
+ case MESA_FORMAT_RGB:
+ {
+ GLuint i, j, k;
+ const GLchan (*rowA)[3] = (const GLchan (*)[3]) srcRowA;
+ const GLchan (*rowB)[3] = (const GLchan (*)[3]) srcRowB;
+ GLchan (*dst)[3] = (GLchan (*)[3]) dstRow;
+ for (i = j = 0, k = k0; i < (GLuint) dstWidth;
+ i++, j += colStride, k += colStride) {
+ dst[i][0] = (rowA[j][0] + rowA[k][0] +
+ rowB[j][0] + rowB[k][0]) / 4;
+ dst[i][1] = (rowA[j][1] + rowA[k][1] +
+ rowB[j][1] + rowB[k][1]) / 4;
+ dst[i][2] = (rowA[j][2] + rowA[k][2] +
+ rowB[j][2] + rowB[k][2]) / 4;
+ }
+ }
+ return;
+ case MESA_FORMAT_ALPHA:
+ case MESA_FORMAT_LUMINANCE:
+ case MESA_FORMAT_INTENSITY:
+ case MESA_FORMAT_COLOR_INDEX:
+ {
+ GLuint i, j, k;
+ const GLchan *rowA = (const GLchan *) srcRowA;
+ const GLchan *rowB = (const GLchan *) srcRowB;
+ GLchan *dst = (GLchan *) dstRow;
+ for (i = j = 0, k = k0; i < (GLuint) dstWidth;
+ i++, j += colStride, k += colStride) {
+ dst[i] = (rowA[j] + rowA[k] + rowB[j] + rowB[k]) / 4;
+ }
+ }
+ return;
+ case MESA_FORMAT_LUMINANCE_ALPHA:
+ {
+ GLuint i, j, k;
+ const GLchan (*rowA)[2] = (const GLchan (*)[2]) srcRowA;
+ const GLchan (*rowB)[2] = (const GLchan (*)[2]) srcRowB;
+ GLchan (*dst)[2] = (GLchan (*)[2]) dstRow;
+ for (i = j = 0, k = k0; i < (GLuint) dstWidth;
+ i++, j += colStride, k += colStride) {
+ dst[i][0] = (rowA[j][0] + rowA[k][0] +
+ rowB[j][0] + rowB[k][0]) / 4;
+ dst[i][1] = (rowA[j][1] + rowA[k][1] +
+ rowB[j][1] + rowB[k][1]) / 4;
+ }
+ }
+ return;
+ case MESA_FORMAT_DEPTH_COMPONENT:
+ {
+ GLuint i, j, k;
+ const GLfloat *rowA = (const GLfloat *) srcRowA;
+ const GLfloat *rowB = (const GLfloat *) srcRowB;
+ GLfloat *dst = (GLfloat *) dstRow;
+ for (i = j = 0, k = k0; i < (GLuint) dstWidth;
+ i++, j += colStride, k += colStride) {
+ dst[i] = (rowA[j] + rowA[k] + rowB[j] + rowB[k]) * 0.25F;
+ }
+ }
+ return;
+ /* Begin hardware formats */
+ case MESA_FORMAT_RGBA8888:
+ case MESA_FORMAT_ARGB8888:
+ {
+ GLuint i, j, k;
+ const GLubyte (*rowA)[4] = (const GLubyte (*)[4]) srcRowA;
+ const GLubyte (*rowB)[4] = (const GLubyte (*)[4]) srcRowB;
+ GLubyte (*dst)[4] = (GLubyte (*)[4]) dstRow;
+ for (i = j = 0, k = k0; i < (GLuint) dstWidth;
+ i++, j += colStride, k += colStride) {
+ dst[i][0] = (rowA[j][0] + rowA[k][0] +
+ rowB[j][0] + rowB[k][0]) / 4;
+ dst[i][1] = (rowA[j][1] + rowA[k][1] +
+ rowB[j][1] + rowB[k][1]) / 4;
+ dst[i][2] = (rowA[j][2] + rowA[k][2] +
+ rowB[j][2] + rowB[k][2]) / 4;
+ dst[i][3] = (rowA[j][3] + rowA[k][3] +
+ rowB[j][3] + rowB[k][3]) / 4;
+ }
+ }
+ return;
+ case MESA_FORMAT_RGB888:
+ {
+ GLuint i, j, k;
+ const GLubyte (*rowA)[3] = (const GLubyte (*)[3]) srcRowA;
+ const GLubyte (*rowB)[3] = (const GLubyte (*)[3]) srcRowB;
+ GLubyte (*dst)[3] = (GLubyte (*)[3]) dstRow;
+ for (i = j = 0, k = k0; i < (GLuint) dstWidth;
+ i++, j += colStride, k += colStride) {
+ dst[i][0] = (rowA[j][0] + rowA[k][0] +
+ rowB[j][0] + rowB[k][0]) / 4;
+ dst[i][1] = (rowA[j][1] + rowA[k][1] +
+ rowB[j][1] + rowB[k][1]) / 4;
+ dst[i][2] = (rowA[j][2] + rowA[k][2] +
+ rowB[j][2] + rowB[k][2]) / 4;
+ }
+ }
+ return;
+ case MESA_FORMAT_RGB565:
+ {
+ GLuint i, j, k;
+ const GLushort *rowA = (const GLushort *) srcRowA;
+ const GLushort *rowB = (const GLushort *) srcRowB;
+ GLushort *dst = (GLushort *) dstRow;
+ for (i = j = 0, k = k0; i < (GLuint) dstWidth;
+ i++, j += colStride, k += colStride) {
+ const GLint rowAr0 = rowA[j] & 0x1f;
+ const GLint rowAr1 = rowA[k] & 0x1f;
+ const GLint rowBr0 = rowB[j] & 0x1f;
+ const GLint rowBr1 = rowB[k] & 0x1f;
+ const GLint rowAg0 = (rowA[j] >> 5) & 0x3f;
+ const GLint rowAg1 = (rowA[k] >> 5) & 0x3f;
+ const GLint rowBg0 = (rowB[j] >> 5) & 0x3f;
+ const GLint rowBg1 = (rowB[k] >> 5) & 0x3f;
+ const GLint rowAb0 = (rowA[j] >> 11) & 0x1f;
+ const GLint rowAb1 = (rowA[k] >> 11) & 0x1f;
+ const GLint rowBb0 = (rowB[j] >> 11) & 0x1f;
+ const GLint rowBb1 = (rowB[k] >> 11) & 0x1f;
+ const GLint red = (rowAr0 + rowAr1 + rowBr0 + rowBr1) >> 4;
+ const GLint green = (rowAg0 + rowAg1 + rowBg0 + rowBg1) >> 4;
+ const GLint blue = (rowAb0 + rowAb1 + rowBb0 + rowBb1) >> 4;
+ dst[i] = (blue << 11) | (green << 5) | red;
+ }
+ }
+ return;
+ case MESA_FORMAT_ARGB4444:
+ {
+ GLuint i, j, k;
+ const GLushort *rowA = (const GLushort *) srcRowA;
+ const GLushort *rowB = (const GLushort *) srcRowB;
+ GLushort *dst = (GLushort *) dstRow;
+ for (i = j = 0, k = k0; i < (GLuint) dstWidth;
+ i++, j += colStride, k += colStride) {
+ const GLint rowAr0 = rowA[j] & 0xf;
+ const GLint rowAr1 = rowA[k] & 0xf;
+ const GLint rowBr0 = rowB[j] & 0xf;
+ const GLint rowBr1 = rowB[k] & 0xf;
+ const GLint rowAg0 = (rowA[j] >> 4) & 0xf;
+ const GLint rowAg1 = (rowA[k] >> 4) & 0xf;
+ const GLint rowBg0 = (rowB[j] >> 4) & 0xf;
+ const GLint rowBg1 = (rowB[k] >> 4) & 0xf;
+ const GLint rowAb0 = (rowA[j] >> 8) & 0xf;
+ const GLint rowAb1 = (rowA[k] >> 8) & 0xf;
+ const GLint rowBb0 = (rowB[j] >> 8) & 0xf;
+ const GLint rowBb1 = (rowB[k] >> 8) & 0xf;
+ const GLint rowAa0 = (rowA[j] >> 12) & 0xf;
+ const GLint rowAa1 = (rowA[k] >> 12) & 0xf;
+ const GLint rowBa0 = (rowB[j] >> 12) & 0xf;
+ const GLint rowBa1 = (rowB[k] >> 12) & 0xf;
+ const GLint red = (rowAr0 + rowAr1 + rowBr0 + rowBr1) >> 4;
+ const GLint green = (rowAg0 + rowAg1 + rowBg0 + rowBg1) >> 4;
+ const GLint blue = (rowAb0 + rowAb1 + rowBb0 + rowBb1) >> 4;
+ const GLint alpha = (rowAa0 + rowAa1 + rowBa0 + rowBa1) >> 4;
+ dst[i] = (alpha << 12) | (blue << 8) | (green << 4) | red;
+ }
+ }
+ return;
+ case MESA_FORMAT_ARGB1555:
+ {
+ GLuint i, j, k;
+ const GLushort *rowA = (const GLushort *) srcRowA;
+ const GLushort *rowB = (const GLushort *) srcRowB;
+ GLushort *dst = (GLushort *) dstRow;
+ for (i = j = 0, k = k0; i < (GLuint) dstWidth;
+ i++, j += colStride, k += colStride) {
+ const GLint rowAr0 = rowA[j] & 0x1f;
+ const GLint rowAr1 = rowA[k] & 0x1f;
+ const GLint rowBr0 = rowB[j] & 0x1f;
+ const GLint rowBr1 = rowB[k] & 0xf;
+ const GLint rowAg0 = (rowA[j] >> 5) & 0x1f;
+ const GLint rowAg1 = (rowA[k] >> 5) & 0x1f;
+ const GLint rowBg0 = (rowB[j] >> 5) & 0x1f;
+ const GLint rowBg1 = (rowB[k] >> 5) & 0x1f;
+ const GLint rowAb0 = (rowA[j] >> 10) & 0x1f;
+ const GLint rowAb1 = (rowA[k] >> 10) & 0x1f;
+ const GLint rowBb0 = (rowB[j] >> 10) & 0x1f;
+ const GLint rowBb1 = (rowB[k] >> 10) & 0x1f;
+ const GLint rowAa0 = (rowA[j] >> 15) & 0x1;
+ const GLint rowAa1 = (rowA[k] >> 15) & 0x1;
+ const GLint rowBa0 = (rowB[j] >> 15) & 0x1;
+ const GLint rowBa1 = (rowB[k] >> 15) & 0x1;
+ const GLint red = (rowAr0 + rowAr1 + rowBr0 + rowBr1) >> 4;
+ const GLint green = (rowAg0 + rowAg1 + rowBg0 + rowBg1) >> 4;
+ const GLint blue = (rowAb0 + rowAb1 + rowBb0 + rowBb1) >> 4;
+ const GLint alpha = (rowAa0 + rowAa1 + rowBa0 + rowBa1) >> 4;
+ dst[i] = (alpha << 15) | (blue << 10) | (green << 5) | red;
+ }
+ }
+ return;
+ case MESA_FORMAT_AL88:
+ {
+ GLuint i, j, k;
+ const GLubyte (*rowA)[2] = (const GLubyte (*)[2]) srcRowA;
+ const GLubyte (*rowB)[2] = (const GLubyte (*)[2]) srcRowB;
+ GLubyte (*dst)[2] = (GLubyte (*)[2]) dstRow;
+ for (i = j = 0, k = k0; i < (GLuint) dstWidth;
+ i++, j += colStride, k += colStride) {
+ dst[i][0] = (rowA[j][0] + rowA[k][0] +
+ rowB[j][0] + rowB[k][0]) >> 2;
+ dst[i][1] = (rowA[j][1] + rowA[k][1] +
+ rowB[j][1] + rowB[k][1]) >> 2;
+ }
+ }
+ return;
+ case MESA_FORMAT_RGB332:
+ {
+ GLuint i, j, k;
+ const GLubyte *rowA = (const GLubyte *) srcRowA;
+ const GLubyte *rowB = (const GLubyte *) srcRowB;
+ GLubyte *dst = (GLubyte *) dstRow;
+ for (i = j = 0, k = k0; i < (GLuint) dstWidth;
+ i++, j += colStride, k += colStride) {
+ const GLint rowAr0 = rowA[j] & 0x3;
+ const GLint rowAr1 = rowA[k] & 0x3;
+ const GLint rowBr0 = rowB[j] & 0x3;
+ const GLint rowBr1 = rowB[k] & 0x3;
+ const GLint rowAg0 = (rowA[j] >> 2) & 0x7;
+ const GLint rowAg1 = (rowA[k] >> 2) & 0x7;
+ const GLint rowBg0 = (rowB[j] >> 2) & 0x7;
+ const GLint rowBg1 = (rowB[k] >> 2) & 0x7;
+ const GLint rowAb0 = (rowA[j] >> 5) & 0x7;
+ const GLint rowAb1 = (rowA[k] >> 5) & 0x7;
+ const GLint rowBb0 = (rowB[j] >> 5) & 0x7;
+ const GLint rowBb1 = (rowB[k] >> 5) & 0x7;
+ const GLint red = (rowAr0 + rowAr1 + rowBr0 + rowBr1) >> 4;
+ const GLint green = (rowAg0 + rowAg1 + rowBg0 + rowBg1) >> 4;
+ const GLint blue = (rowAb0 + rowAb1 + rowBb0 + rowBb1) >> 4;
+ dst[i] = (blue << 5) | (green << 2) | red;
+ }
+ }
+ return;
+ case MESA_FORMAT_A8:
+ case MESA_FORMAT_L8:
+ case MESA_FORMAT_I8:
+ case MESA_FORMAT_CI8:
+ {
+ GLuint i, j, k;
+ const GLubyte *rowA = (const GLubyte *) srcRowA;
+ const GLubyte *rowB = (const GLubyte *) srcRowB;
+ GLubyte *dst = (GLubyte *) dstRow;
+ for (i = j = 0, k = k0; i < (GLuint) dstWidth;
+ i++, j += colStride, k += colStride) {
+ dst[i] = (rowA[j] + rowA[k] + rowB[j] + rowB[k]) >> 2;
+ }
+ }
+ return;
+ default:
+ _mesa_problem(NULL, "bad format in do_row()");
+ }
+}
+
+
+/*
+ * These functions generate a 1/2-size mipmap image from a source image.
+ * Texture borders are handled by copying or averaging the source image's
+ * border texels, depending on the scale-down factor.
+ */
+
+static void
+make_1d_mipmap(const struct gl_texture_format *format, GLint border,
+ GLint srcWidth, const GLubyte *srcPtr,
+ GLint dstWidth, GLubyte *dstPtr)
+{
+ const GLint bpt = format->TexelBytes;
+ const GLubyte *src;
+ GLubyte *dst;
+
+ /* skip the border pixel, if any */
+ src = srcPtr + border * bpt;
+ dst = dstPtr + border * bpt;
+
+ /* we just duplicate the input row, kind of hack, saves code */
+ do_row(format, srcWidth - 2 * border, src, src,
+ dstWidth - 2 * border, dst);
+
+ if (border) {
+ /* copy left-most pixel from source */
+ MEMCPY(dstPtr, srcPtr, bpt);
+ /* copy right-most pixel from source */
+ MEMCPY(dstPtr + (dstWidth - 1) * bpt,
+ srcPtr + (srcWidth - 1) * bpt,
+ bpt);
+ }
+}
+
+
+static void
+make_2d_mipmap(const struct gl_texture_format *format, GLint border,
+ GLint srcWidth, GLint srcHeight, const GLubyte *srcPtr,
+ GLint dstWidth, GLint dstHeight, GLubyte *dstPtr)
+{
+ const GLint bpt = format->TexelBytes;
+ const GLint srcWidthNB = srcWidth - 2 * border; /* sizes w/out border */
+ const GLint dstWidthNB = dstWidth - 2 * border;
+ const GLint dstHeightNB = dstHeight - 2 * border;
+ const GLint srcRowStride = bpt * srcWidth;
+ const GLint dstRowStride = bpt * dstWidth;
+ const GLubyte *srcA, *srcB;
+ GLubyte *dst;
+ GLint row, colStride;
+
+ colStride = (srcWidth == dstWidth) ? 1 : 2;
+
+ /* Compute src and dst pointers, skipping any border */
+ srcA = srcPtr + border * ((srcWidth + 1) * bpt);
+ if (srcHeight > 1)
+ srcB = srcA + srcRowStride;
+ else
+ srcB = srcA;
+ dst = dstPtr + border * ((dstWidth + 1) * bpt);
+
+ for (row = 0; row < dstHeightNB; row++) {
+ do_row(format, srcWidthNB, srcA, srcB,
+ dstWidthNB, dst);
+ srcA += 2 * srcRowStride;
+ srcB += 2 * srcRowStride;
+ dst += dstRowStride;
+ }
+
+ /* This is ugly but probably won't be used much */
+ if (border > 0) {
+ /* fill in dest border */
+ /* lower-left border pixel */
+ MEMCPY(dstPtr, srcPtr, bpt);
+ /* lower-right border pixel */
+ MEMCPY(dstPtr + (dstWidth - 1) * bpt,
+ srcPtr + (srcWidth - 1) * bpt, bpt);
+ /* upper-left border pixel */
+ MEMCPY(dstPtr + dstWidth * (dstHeight - 1) * bpt,
+ srcPtr + srcWidth * (srcHeight - 1) * bpt, bpt);
+ /* upper-right border pixel */
+ MEMCPY(dstPtr + (dstWidth * dstHeight - 1) * bpt,
+ srcPtr + (srcWidth * srcHeight - 1) * bpt, bpt);
+ /* lower border */
+ do_row(format, srcWidthNB,
+ srcPtr + bpt,
+ srcPtr + bpt,
+ dstWidthNB, dstPtr + bpt);
+ /* upper border */
+ do_row(format, srcWidthNB,
+ srcPtr + (srcWidth * (srcHeight - 1) + 1) * bpt,
+ srcPtr + (srcWidth * (srcHeight - 1) + 1) * bpt,
+ dstWidthNB,
+ dstPtr + (dstWidth * (dstHeight - 1) + 1) * bpt);
+ /* left and right borders */
+ if (srcHeight == dstHeight) {
+ /* copy border pixel from src to dst */
+ for (row = 1; row < srcHeight; row++) {
+ MEMCPY(dstPtr + dstWidth * row * bpt,
+ srcPtr + srcWidth * row * bpt, bpt);
+ MEMCPY(dstPtr + (dstWidth * row + dstWidth - 1) * bpt,
+ srcPtr + (srcWidth * row + srcWidth - 1) * bpt, bpt);
+ }
+ }
+ else {
+ /* average two src pixels each dest pixel */
+ for (row = 0; row < dstHeightNB; row += 2) {
+ do_row(format, 1,
+ srcPtr + (srcWidth * (row * 2 + 1)) * bpt,
+ srcPtr + (srcWidth * (row * 2 + 2)) * bpt,
+ 1, dstPtr + (dstWidth * row + 1) * bpt);
+ do_row(format, 1,
+ srcPtr + (srcWidth * (row * 2 + 1) + srcWidth - 1) * bpt,
+ srcPtr + (srcWidth * (row * 2 + 2) + srcWidth - 1) * bpt,
+ 1, dstPtr + (dstWidth * row + 1 + dstWidth - 1) * bpt);
+ }
+ }
+ }
+}
+
+
+static void
+make_3d_mipmap(const struct gl_texture_format *format, GLint border,
+ GLint srcWidth, GLint srcHeight, GLint srcDepth,
+ const GLubyte *srcPtr,
+ GLint dstWidth, GLint dstHeight, GLint dstDepth,
+ GLubyte *dstPtr)
+{
+ const GLint bpt = format->TexelBytes;
+ const GLint srcWidthNB = srcWidth - 2 * border; /* sizes w/out border */
+ const GLint srcDepthNB = srcDepth - 2 * border;
+ const GLint dstWidthNB = dstWidth - 2 * border;
+ const GLint dstHeightNB = dstHeight - 2 * border;
+ const GLint dstDepthNB = dstDepth - 2 * border;
+ GLvoid *tmpRowA, *tmpRowB;
+ GLint img, row;
+ GLint bytesPerSrcImage, bytesPerDstImage;
+ GLint bytesPerSrcRow, bytesPerDstRow;
+ GLint srcImageOffset, srcRowOffset;
+
+ (void) srcDepthNB; /* silence warnings */
+
+ /* Need two temporary row buffers */
+ tmpRowA = MALLOC(srcWidth * bpt);
+ if (!tmpRowA)
+ return;
+ tmpRowB = MALLOC(srcWidth * bpt);
+ if (!tmpRowB) {
+ FREE(tmpRowA);
+ return;
+ }
+
+ bytesPerSrcImage = srcWidth * srcHeight * bpt;
+ bytesPerDstImage = dstWidth * dstHeight * bpt;
+
+ bytesPerSrcRow = srcWidth * bpt;
+ bytesPerDstRow = dstWidth * bpt;
+
+ /* Offset between adjacent src images to be averaged together */
+ srcImageOffset = (srcDepth == dstDepth) ? 0 : bytesPerSrcImage;
+
+ /* Offset between adjacent src rows to be averaged together */
+ srcRowOffset = (srcHeight == dstHeight) ? 0 : srcWidth * bpt;
+
+ /*
+ * Need to average together up to 8 src pixels for each dest pixel.
+ * Break that down into 3 operations:
+ * 1. take two rows from source image and average them together.
+ * 2. take two rows from next source image and average them together.
+ * 3. take the two averaged rows and average them for the final dst row.
+ */
+
+ /*
+ _mesa_printf("mip3d %d x %d x %d -> %d x %d x %d\n",
+ srcWidth, srcHeight, srcDepth, dstWidth, dstHeight, dstDepth);
+ */
+
+ for (img = 0; img < dstDepthNB; img++) {
+ /* first source image pointer, skipping border */
+ const GLubyte *imgSrcA = srcPtr
+ + (bytesPerSrcImage + bytesPerSrcRow + border) * bpt * border
+ + img * (bytesPerSrcImage + srcImageOffset);
+ /* second source image pointer, skipping border */
+ const GLubyte *imgSrcB = imgSrcA + srcImageOffset;
+ /* address of the dest image, skipping border */
+ GLubyte *imgDst = dstPtr
+ + (bytesPerDstImage + bytesPerDstRow + border) * bpt * border
+ + img * bytesPerDstImage;
+
+ /* setup the four source row pointers and the dest row pointer */
+ const GLubyte *srcImgARowA = imgSrcA;
+ const GLubyte *srcImgARowB = imgSrcA + srcRowOffset;
+ const GLubyte *srcImgBRowA = imgSrcB;
+ const GLubyte *srcImgBRowB = imgSrcB + srcRowOffset;
+ GLubyte *dstImgRow = imgDst;
+
+ for (row = 0; row < dstHeightNB; row++) {
+ /* Average together two rows from first src image */
+ do_row(format, srcWidthNB, srcImgARowA, srcImgARowB,
+ srcWidthNB, tmpRowA);
+ /* Average together two rows from second src image */
+ do_row(format, srcWidthNB, srcImgBRowA, srcImgBRowB,
+ srcWidthNB, tmpRowB);
+ /* Average together the temp rows to make the final row */
+ do_row(format, srcWidthNB, tmpRowA, tmpRowB,
+ dstWidthNB, dstImgRow);
+ /* advance to next rows */
+ srcImgARowA += bytesPerSrcRow + srcRowOffset;
+ srcImgARowB += bytesPerSrcRow + srcRowOffset;
+ srcImgBRowA += bytesPerSrcRow + srcRowOffset;
+ srcImgBRowB += bytesPerSrcRow + srcRowOffset;
+ dstImgRow += bytesPerDstRow;
+ }
+ }
+
+ FREE(tmpRowA);
+ FREE(tmpRowB);
+
+ /* Luckily we can leverage the make_2d_mipmap() function here! */
+ if (border > 0) {
+ /* do front border image */
+ make_2d_mipmap(format, 1, srcWidth, srcHeight, srcPtr,
+ dstWidth, dstHeight, dstPtr);
+ /* do back border image */
+ make_2d_mipmap(format, 1, srcWidth, srcHeight,
+ srcPtr + bytesPerSrcImage * (srcDepth - 1),
+ dstWidth, dstHeight,
+ dstPtr + bytesPerDstImage * (dstDepth - 1));
+ /* do four remaining border edges that span the image slices */
+ if (srcDepth == dstDepth) {
+ /* just copy border pixels from src to dst */
+ for (img = 0; img < dstDepthNB; img++) {
+ const GLubyte *src;
+ GLubyte *dst;
+
+ /* do border along [img][row=0][col=0] */
+ src = srcPtr + (img + 1) * bytesPerSrcImage;
+ dst = dstPtr + (img + 1) * bytesPerDstImage;
+ MEMCPY(dst, src, bpt);
+
+ /* do border along [img][row=dstHeight-1][col=0] */
+ src = srcPtr + (img * 2 + 1) * bytesPerSrcImage
+ + (srcHeight - 1) * bytesPerSrcRow;
+ dst = dstPtr + (img + 1) * bytesPerDstImage
+ + (dstHeight - 1) * bytesPerDstRow;
+ MEMCPY(dst, src, bpt);
+
+ /* do border along [img][row=0][col=dstWidth-1] */
+ src = srcPtr + (img * 2 + 1) * bytesPerSrcImage
+ + (srcWidth - 1) * bpt;
+ dst = dstPtr + (img + 1) * bytesPerDstImage
+ + (dstWidth - 1) * bpt;
+ MEMCPY(dst, src, bpt);
+
+ /* do border along [img][row=dstHeight-1][col=dstWidth-1] */
+ src = srcPtr + (img * 2 + 1) * bytesPerSrcImage
+ + (bytesPerSrcImage - bpt);
+ dst = dstPtr + (img + 1) * bytesPerDstImage
+ + (bytesPerDstImage - bpt);
+ MEMCPY(dst, src, bpt);
+ }
+ }
+ else {
+ /* average border pixels from adjacent src image pairs */
+ ASSERT(srcDepthNB == 2 * dstDepthNB);
+ for (img = 0; img < dstDepthNB; img++) {
+ const GLubyte *src;
+ GLubyte *dst;
+
+ /* do border along [img][row=0][col=0] */
+ src = srcPtr + (img * 2 + 1) * bytesPerSrcImage;
+ dst = dstPtr + (img + 1) * bytesPerDstImage;
+ do_row(format, 1, src, src + srcImageOffset, 1, dst);
+
+ /* do border along [img][row=dstHeight-1][col=0] */
+ src = srcPtr + (img * 2 + 1) * bytesPerSrcImage
+ + (srcHeight - 1) * bytesPerSrcRow;
+ dst = dstPtr + (img + 1) * bytesPerDstImage
+ + (dstHeight - 1) * bytesPerDstRow;
+ do_row(format, 1, src, src + srcImageOffset, 1, dst);
+
+ /* do border along [img][row=0][col=dstWidth-1] */
+ src = srcPtr + (img * 2 + 1) * bytesPerSrcImage
+ + (srcWidth - 1) * bpt;
+ dst = dstPtr + (img + 1) * bytesPerDstImage
+ + (dstWidth - 1) * bpt;
+ do_row(format, 1, src, src + srcImageOffset, 1, dst);
+
+ /* do border along [img][row=dstHeight-1][col=dstWidth-1] */
+ src = srcPtr + (img * 2 + 1) * bytesPerSrcImage
+ + (bytesPerSrcImage - bpt);
+ dst = dstPtr + (img + 1) * bytesPerDstImage
+ + (bytesPerDstImage - bpt);
+ do_row(format, 1, src, src + srcImageOffset, 1, dst);
+ }
+ }
+ }
+}
+
+
+/*
+ * For GL_SGIX_generate_mipmap:
+ * Generate a complete set of mipmaps from texObj's base-level image.
+ * Stop at texObj's MaxLevel or when we get to the 1x1 texture.
+ */
+void
+_mesa_generate_mipmap(GLcontext *ctx, GLenum target,
+ const struct gl_texture_unit *texUnit,
+ struct gl_texture_object *texObj)
+{
+ const struct gl_texture_image *srcImage;
+ const struct gl_texture_format *convertFormat;
+ const GLubyte *srcData;
+ GLubyte *dstData;
+ GLint level, maxLevels;
+
+ ASSERT(texObj);
+ srcImage = texObj->Image[texObj->BaseLevel];
+ ASSERT(srcImage);
+
+ maxLevels = _mesa_max_texture_levels(ctx, texObj->Target);
+ ASSERT(maxLevels > 0); /* bad target */
+
+ /* Find convertFormat - the format that do_row() will process */
+ if (srcImage->IsCompressed) {
+ /* setup for compressed textures */
+ GLint row, components, size;
+ GLchan *dst;
+
+ assert(texObj->Target == GL_TEXTURE_2D);
+
+ if (srcImage->Format == GL_RGB) {
+ convertFormat = &_mesa_texformat_rgb;
+ components = 3;
+ }
+ else if (srcImage->Format == GL_RGBA) {
+ convertFormat = &_mesa_texformat_rgba;
+ components = 4;
+ }
+ else {
+ _mesa_problem(ctx, "bad srcImage->Format in _mesa_generate_mipmaps");
+ return;
+ }
+
+ /* allocate storage for uncompressed GL_RGB or GL_RGBA images */
+ size = _mesa_bytes_per_pixel(srcImage->Format, CHAN_TYPE)
+ * srcImage->Width * srcImage->Height * srcImage->Depth + 20;
+ /* 20 extra bytes, just be safe when calling last FetchTexel */
+ srcData = MALLOC(size);
+ if (!srcData) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "generate mipmaps");
+ return;
+ }
+ dstData = MALLOC(size / 2); /* 1/4 would probably be OK */
+ if (!dstData) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "generate mipmaps");
+ FREE((void *) srcData);
+ return;
+ }
+
+ /* decompress base image here */
+ dst = (GLchan *) srcData;
+ for (row = 0; row < srcImage->Height; row++) {
+ GLint col;
+ for (col = 0; col < srcImage->Width; col++) {
+ (*srcImage->FetchTexel)(srcImage, col, row, 0, (GLvoid *) dst);
+ dst += components;
+ }
+ }
+ }
+ else {
+ /* uncompressed */
+ convertFormat = srcImage->TexFormat;
+ }
+
+ for (level = texObj->BaseLevel; level < texObj->MaxLevel
+ && level < maxLevels - 1; level++) {
+ /* generate image[level+1] from image[level] */
+ const struct gl_texture_image *srcImage;
+ struct gl_texture_image *dstImage;
+ GLint srcWidth, srcHeight, srcDepth;
+ GLint dstWidth, dstHeight, dstDepth;
+ GLint border, bytesPerTexel;
+
+ /* get src image parameters */
+ srcImage = texObj->Image[level];
+ ASSERT(srcImage);
+ srcWidth = srcImage->Width;
+ srcHeight = srcImage->Height;
+ srcDepth = srcImage->Depth;
+ border = srcImage->Border;
+
+ /* compute next (level+1) image size */
+ if (srcWidth - 2 * border > 1) {
+ dstWidth = (srcWidth - 2 * border) / 2 + 2 * border;
+ }
+ else {
+ dstWidth = srcWidth; /* can't go smaller */
+ }
+ if (srcHeight - 2 * border > 1) {
+ dstHeight = (srcHeight - 2 * border) / 2 + 2 * border;
+ }
+ else {
+ dstHeight = srcHeight; /* can't go smaller */
+ }
+ if (srcDepth - 2 * border > 1) {
+ dstDepth = (srcDepth - 2 * border) / 2 + 2 * border;
+ }
+ else {
+ dstDepth = srcDepth; /* can't go smaller */
+ }
+
+ if (dstWidth == srcWidth &&
+ dstHeight == srcHeight &&
+ dstDepth == srcDepth) {
+ /* all done */
+ if (srcImage->IsCompressed) {
+ FREE((void *) srcData);
+ FREE(dstData);
+ }
+ return;
+ }
+
+ /* get dest gl_texture_image */
+ dstImage = _mesa_select_tex_image(ctx, texUnit, target, level+1);
+ if (!dstImage) {
+ dstImage = _mesa_alloc_texture_image();
+ if (!dstImage) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "generating mipmaps");
+ return;
+ }
+ _mesa_set_tex_image(texObj, target, level + 1, dstImage);
+ }
+
+ /* Free old image data */
+ if (dstImage->Data)
+ MESA_PBUFFER_FREE(dstImage->Data);
+
+ /* initialize new image */
+ _mesa_init_teximage_fields(ctx, target, dstImage, dstWidth, dstHeight,
+ dstDepth, border, srcImage->IntFormat);
+ dstImage->DriverData = NULL;
+ dstImage->TexFormat = srcImage->TexFormat;
+ dstImage->FetchTexel = srcImage->FetchTexel;
+ ASSERT(dstImage->TexFormat);
+ ASSERT(dstImage->FetchTexel);
+
+ /* Alloc new teximage data buffer.
+ * Setup src and dest data pointers.
+ */
+ if (dstImage->IsCompressed) {
+ ASSERT(dstImage->CompressedSize > 0); /* set by init_teximage_fields*/
+ dstImage->Data = MESA_PBUFFER_ALLOC(dstImage->CompressedSize);
+ if (!dstImage->Data) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "generating mipmaps");
+ return;
+ }
+ /* srcData and dstData are already set */
+ ASSERT(srcData);
+ ASSERT(dstData);
+ }
+ else {
+ bytesPerTexel = srcImage->TexFormat->TexelBytes;
+ ASSERT(dstWidth * dstHeight * dstDepth * bytesPerTexel > 0);
+ dstImage->Data = MESA_PBUFFER_ALLOC(dstWidth * dstHeight * dstDepth
+ * bytesPerTexel);
+ if (!dstImage->Data) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "generating mipmaps");
+ return;
+ }
+ srcData = (const GLubyte *) srcImage->Data;
+ dstData = (GLubyte *) dstImage->Data;
+ }
+
+ /*
+ * We use simple 2x2 averaging to compute the next mipmap level.
+ */
+ switch (target) {
+ case GL_TEXTURE_1D:
+ make_1d_mipmap(convertFormat, border,
+ srcWidth, srcData,
+ dstWidth, dstData);
+ break;
+ case GL_TEXTURE_2D:
+ case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB:
+ case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB:
+ case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB:
+ case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB:
+ case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB:
+ case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB:
+ make_2d_mipmap(convertFormat, border,
+ srcWidth, srcHeight, srcData,
+ dstWidth, dstHeight, dstData);
+ break;
+ case GL_TEXTURE_3D:
+ make_3d_mipmap(convertFormat, border,
+ srcWidth, srcHeight, srcDepth, srcData,
+ dstWidth, dstHeight, dstDepth, dstData);
+ break;
+ case GL_TEXTURE_RECTANGLE_NV:
+ /* no mipmaps, do nothing */
+ break;
+ default:
+ _mesa_problem(ctx, "bad dimensions in _mesa_generate_mipmaps");
+ return;
+ }
+
+ if (dstImage->IsCompressed) {
+ GLubyte *temp;
+ /* compress image from dstData into dstImage->Data */
+ const GLenum srcFormat = convertFormat->BaseFormat;
+ GLint dstRowStride = _mesa_compressed_row_stride(srcImage->IntFormat,
+ dstWidth);
+ ASSERT(srcFormat == GL_RGB || srcFormat == GL_RGBA);
+ _mesa_compress_teximage(ctx,
+ dstWidth, dstHeight, /* size */
+ srcFormat, /* source format */
+ dstData, /* source buffer */
+ dstWidth, /* source row stride */
+ dstImage->TexFormat, /* dest format */
+ dstImage->Data, /* dest buffer */
+ dstRowStride ); /* dest row stride */
+
+ /* swap src and dest pointers */
+ temp = (GLubyte *) srcData;
+ srcData = dstData;
+ dstData = temp;
+ }
+
+ } /* loop over mipmap levels */
+}
projects / mesa.git / blobdiff