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6258b76c49f49a56a7c713914b798e80c6553b06
third_party_mesa3d/src/mesa/main/texstore.c
Karl Schultz 6258b76c49 Port Mesa to build on a P64 platform (e.g., Win64). P64 platforms 
use 64-bit pointers and 32-bit longs.  So, operations like casting pointers
to unsigned long and back to pointer won't work.  glheader.h now
includes files to define uintptr_t, which should instead be used for
this sort of operation.  It is an integer type that is the same size
as a pointer.
2005-05-05 21:08:07 +00:00

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/*
* Mesa 3-D graphics library
* Version: 6.3
*
* Copyright (C) 1999-2005 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"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/*
* Authors:
* Brian Paul
*/
/*
* 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 "bufferobj.h"
#include "colormac.h"
#include "context.h"
#include "convolve.h"
#include "image.h"
#include "macros.h"
#include "imports.h"
#include "texcompress.h"
#include "texformat.h"
#include "teximage.h"
#include "texstore.h"
static const GLint ZERO = 4, ONE = 5;
static GLboolean can_swizzle(GLenum logicalBaseFormat)
{
switch (logicalBaseFormat) {
case GL_RGBA:
case GL_RGB:
case GL_LUMINANCE_ALPHA:
case GL_INTENSITY:
case GL_ALPHA:
case GL_LUMINANCE:
return GL_TRUE;
default:
return GL_FALSE;
}
}
/**
* When promoting texture formats (see below) we need to compute the
* mapping of dest components back to source components.
* This function does that.
* \param logicalBaseFormat the logical format of the texture
* \param textureBaseFormat the final texture format
* \return map[4] the four mapping values
*/
static void
compute_component_mapping(GLenum logicalBaseFormat, GLenum textureBaseFormat,
GLubyte map[6])
{
map[ZERO] = ZERO;
map[ONE] = ONE;
/* compute mapping from dest components back to src components */
switch (textureBaseFormat) {
case GL_RGB:
case GL_RGBA:
switch (logicalBaseFormat) {
case GL_LUMINANCE:
map[0] = map[1] = map[2] = 0;
if (textureBaseFormat == GL_RGBA)
map[3] = ONE;
break;
case GL_ALPHA:
ASSERT(textureBaseFormat == GL_RGBA);
map[0] = map[1] = map[2] = ZERO;
map[3] = 0;
break;
case GL_INTENSITY:
map[0] = map[1] = map[2] = 0;
if (textureBaseFormat == GL_RGBA)
map[3] = 0;
break;
case GL_LUMINANCE_ALPHA:
ASSERT(textureBaseFormat == GL_RGBA);
map[0] = map[1] = map[2] = 0;
map[3] = 1;
break;
case GL_RGB:
ASSERT(textureBaseFormat == GL_RGBA);
map[0] = 0;
map[1] = 1;
map[2] = 2;
map[3] = ONE;
break;
case GL_RGBA:
ASSERT(textureBaseFormat == GL_RGBA);
map[0] = 0;
map[1] = 1;
map[2] = 2;
map[3] = 3;
break;
default:
_mesa_problem(NULL, "Unexpected logicalBaseFormat");
map[0] = map[1] = map[2] = map[3] = 0;
}
break;
case GL_LUMINANCE_ALPHA:
switch (logicalBaseFormat) {
case GL_LUMINANCE:
map[0] = 0;
map[1] = ONE;
break;
case GL_ALPHA:
map[0] = ZERO;
map[1] = 0;
break;
case GL_INTENSITY:
map[0] = 0;
map[1] = 0;
break;
default:
_mesa_problem(NULL, "Unexpected logicalBaseFormat");
map[0] = map[1] = 0;
}
break;
default:
_mesa_problem(NULL, "Unexpected logicalBaseFormat");
map[0] = map[1] = 0;
break;
}
}
/**
* Make a temporary (color) texture image with GLfloat components.
* Apply all needed pixel unpacking and pixel transfer operations.
* Note that there are both logicalBaseFormat and textureBaseFormat parameters.
* Suppose the user specifies GL_LUMINANCE as the internal texture format
* but the graphics hardware doesn't support luminance textures. So, might
* use an RGB hardware format instead.
* If logicalBaseFormat != textureBaseFormat we have some extra work to do.
*
* \param ctx the rendering context
* \param dims image dimensions: 1, 2 or 3
* \param logicalBaseFormat basic texture derived from the user's
* internal texture format value
* \param textureBaseFormat the actual basic format of the texture
* \param srcWidth source image width
* \param srcHeight source image height
* \param srcDepth source image depth
* \param srcFormat source image format
* \param srcType source image type
* \param srcAddr source image address
* \param srcPacking source image pixel packing
* \return resulting image with format = textureBaseFormat and type = GLfloat.
*/
static GLfloat *
make_temp_float_image(GLcontext *ctx, GLuint dims,
GLenum logicalBaseFormat,
GLenum textureBaseFormat,
GLint srcWidth, GLint srcHeight, GLint srcDepth,
GLenum srcFormat, GLenum srcType,
const GLvoid *srcAddr,
const struct gl_pixelstore_attrib *srcPacking)
{
GLuint transferOps = ctx->_ImageTransferState;
GLfloat *tempImage;
ASSERT(dims >= 1 && dims <= 3);
ASSERT(logicalBaseFormat == GL_RGBA ||
logicalBaseFormat == GL_RGB ||
logicalBaseFormat == GL_LUMINANCE_ALPHA ||
logicalBaseFormat == GL_LUMINANCE ||
logicalBaseFormat == GL_ALPHA ||
logicalBaseFormat == GL_INTENSITY ||
logicalBaseFormat == GL_COLOR_INDEX ||
logicalBaseFormat == GL_DEPTH_COMPONENT);
ASSERT(textureBaseFormat == GL_RGBA ||
textureBaseFormat == GL_RGB ||
textureBaseFormat == GL_LUMINANCE_ALPHA ||
textureBaseFormat == GL_LUMINANCE ||
textureBaseFormat == GL_ALPHA ||
textureBaseFormat == GL_INTENSITY ||
textureBaseFormat == GL_COLOR_INDEX ||
textureBaseFormat == GL_DEPTH_COMPONENT);
/* conventional color image */
if ((dims == 1 && ctx->Pixel.Convolution1DEnabled) ||
(dims >= 2 && ctx->Pixel.Convolution2DEnabled) ||
(dims >= 2 && ctx->Pixel.Separable2DEnabled)) {
/* need image convolution */
const GLuint preConvTransferOps
= (transferOps & IMAGE_PRE_CONVOLUTION_BITS) | IMAGE_CLAMP_BIT;
const GLuint postConvTransferOps
= (transferOps & IMAGE_POST_CONVOLUTION_BITS) | IMAGE_CLAMP_BIT;
GLint img, row;
GLint convWidth, convHeight;
GLfloat *convImage;
/* pre-convolution image buffer (3D) */
tempImage = (GLfloat *) _mesa_malloc(srcWidth * srcHeight * srcDepth
* 4 * sizeof(GLfloat));
if (!tempImage)
return NULL;
/* post-convolution image buffer (2D) */
convImage = (GLfloat *) _mesa_malloc(srcWidth * srcHeight
* 4 * sizeof(GLfloat));
if (!convImage) {
_mesa_free(tempImage);
return NULL;
}
/* loop over 3D image slices */
for (img = 0; img < srcDepth; img++) {
GLfloat *dst = tempImage + img * (srcWidth * srcHeight * 4);
/* unpack and do transfer ops up to convolution */
for (row = 0; row < srcHeight; row++) {
const GLvoid *src = _mesa_image_address(dims, srcPacking,
srcAddr, srcWidth, srcHeight,
srcFormat, srcType, img, row, 0);
_mesa_unpack_color_span_float(ctx, srcWidth, GL_RGBA, dst,
srcFormat, srcType, src,
srcPacking,
preConvTransferOps);
dst += srcWidth * 4;
}
/* do convolution */
{
GLfloat *src = tempImage + img * (srcWidth * srcHeight * 4);
convWidth = srcWidth;
convHeight = srcHeight;
if (dims == 1) {
ASSERT(ctx->Pixel.Convolution1DEnabled);
_mesa_convolve_1d_image(ctx, &convWidth, src, convImage);
}
else {
if (ctx->Pixel.Convolution2DEnabled) {
_mesa_convolve_2d_image(ctx, &convWidth, &convHeight,
src, convImage);
}
else {
ASSERT(ctx->Pixel.Separable2DEnabled);
_mesa_convolve_sep_image(ctx, &convWidth, &convHeight,
src, convImage);
}
}
}
/* do post-convolution transfer and pack into tempImage */
{
const GLint logComponents
= _mesa_components_in_format(logicalBaseFormat);
const GLfloat *src = convImage;
GLfloat *dst = tempImage + img * (convWidth * convHeight * 4);
for (row = 0; row < convHeight; row++) {
_mesa_pack_rgba_span_float(ctx, convWidth,
(const GLfloat (*)[4]) src,
logicalBaseFormat, GL_FLOAT,
dst, &ctx->DefaultPacking,
postConvTransferOps);
src += convWidth * 4;
dst += convWidth * logComponents;
}
}
} /* loop over 3D image slices */
_mesa_free(convImage);
/* might need these below */
srcWidth = convWidth;
srcHeight = convHeight;
}
else {
/* no convolution */
const GLint components = _mesa_components_in_format(logicalBaseFormat);
const GLint srcStride = _mesa_image_row_stride(srcPacking,
srcWidth, srcFormat, srcType);
GLfloat *dst;
GLint img, row;
tempImage = (GLfloat *) _mesa_malloc(srcWidth * srcHeight * srcDepth
* components * sizeof(GLfloat));
if (!tempImage)
return NULL;
dst = tempImage;
for (img = 0; img < srcDepth; img++) {
const GLubyte *src
= (const GLubyte *) _mesa_image_address(dims, srcPacking, srcAddr,
srcWidth, srcHeight,
srcFormat, srcType,
img, 0, 0);
for (row = 0; row < srcHeight; row++) {
_mesa_unpack_color_span_float(ctx, srcWidth, logicalBaseFormat,
dst, srcFormat, srcType, src,
srcPacking, transferOps);
dst += srcWidth * components;
src += srcStride;
}
}
}
if (logicalBaseFormat != textureBaseFormat) {
/* more work */
GLint texComponents = _mesa_components_in_format(textureBaseFormat);
GLint logComponents = _mesa_components_in_format(logicalBaseFormat);
GLfloat *newImage;
GLint i, n;
GLubyte map[6];
/* we only promote up to RGB, RGBA and LUMINANCE_ALPHA formats for now */
ASSERT(textureBaseFormat == GL_RGB || textureBaseFormat == GL_RGBA ||
textureBaseFormat == GL_LUMINANCE_ALPHA);
/* The actual texture format should have at least as many components
* as the logical texture format.
*/
ASSERT(texComponents >= logComponents);
newImage = (GLfloat *) _mesa_malloc(srcWidth * srcHeight * srcDepth
* texComponents * sizeof(GLfloat));
if (!newImage) {
_mesa_free(tempImage);
return NULL;
}
compute_component_mapping(logicalBaseFormat, textureBaseFormat, map);
n = srcWidth * srcHeight * srcDepth;
for (i = 0; i < n; i++) {
GLint k;
for (k = 0; k < texComponents; k++) {
GLint j = map[k];
if (j == ZERO)
newImage[i * texComponents + k] = 0.0F;
else if (j == ONE)
newImage[i * texComponents + k] = 1.0F;
else
newImage[i * texComponents + k] = tempImage[i * logComponents + j];
}
}
_mesa_free(tempImage);
tempImage = newImage;
}
return tempImage;
}
/**
* Make a temporary (color) texture image with GLchan components.
* Apply all needed pixel unpacking and pixel transfer operations.
* Note that there are both logicalBaseFormat and textureBaseFormat parameters.
* Suppose the user specifies GL_LUMINANCE as the internal texture format
* but the graphics hardware doesn't support luminance textures. So, might
* use an RGB hardware format instead.
* If logicalBaseFormat != textureBaseFormat we have some extra work to do.
*
* \param ctx the rendering context
* \param dims image dimensions: 1, 2 or 3
* \param logicalBaseFormat basic texture derived from the user's
* internal texture format value
* \param textureBaseFormat the actual basic format of the texture
* \param srcWidth source image width
* \param srcHeight source image height
* \param srcDepth source image depth
* \param srcFormat source image format
* \param srcType source image type
* \param srcAddr source image address
* \param srcPacking source image pixel packing
* \return resulting image with format = textureBaseFormat and type = GLchan.
*/
GLchan *
_mesa_make_temp_chan_image(GLcontext *ctx, GLuint dims,
GLenum logicalBaseFormat,
GLenum textureBaseFormat,
GLint srcWidth, GLint srcHeight, GLint srcDepth,
GLenum srcFormat, GLenum srcType,
const GLvoid *srcAddr,
const struct gl_pixelstore_attrib *srcPacking)
{
GLuint transferOps = ctx->_ImageTransferState;
const GLint components = _mesa_components_in_format(logicalBaseFormat);
GLboolean freeSrcImage = GL_FALSE;
GLint img, row;
GLchan *tempImage, *dst;
ASSERT(dims >= 1 && dims <= 3);
ASSERT(logicalBaseFormat == GL_RGBA ||
logicalBaseFormat == GL_RGB ||
logicalBaseFormat == GL_LUMINANCE_ALPHA ||
logicalBaseFormat == GL_LUMINANCE ||
logicalBaseFormat == GL_ALPHA ||
logicalBaseFormat == GL_INTENSITY);
ASSERT(textureBaseFormat == GL_RGBA ||
textureBaseFormat == GL_RGB ||
textureBaseFormat == GL_LUMINANCE_ALPHA ||
textureBaseFormat == GL_LUMINANCE ||
textureBaseFormat == GL_ALPHA ||
textureBaseFormat == GL_INTENSITY);
if ((dims == 1 && ctx->Pixel.Convolution1DEnabled) ||
(dims >= 2 && ctx->Pixel.Convolution2DEnabled) ||
(dims >= 2 && ctx->Pixel.Separable2DEnabled)) {
/* get convolved image */
GLfloat *convImage = make_temp_float_image(ctx, dims,
logicalBaseFormat,
logicalBaseFormat,
srcWidth, srcHeight, srcDepth,
srcFormat, srcType,
srcAddr, srcPacking);
if (!convImage)
return NULL;
/* the convolved image is our new source image */
srcAddr = convImage;
srcFormat = logicalBaseFormat;
srcType = GL_FLOAT;
srcPacking = &ctx->DefaultPacking;
_mesa_adjust_image_for_convolution(ctx, dims, &srcWidth, &srcHeight);
transferOps = 0;
freeSrcImage = GL_TRUE;
}
/* unpack and transfer the source image */
tempImage = (GLchan *) _mesa_malloc(srcWidth * srcHeight * srcDepth
* components * sizeof(GLchan));
if (!tempImage)
return NULL;
dst = tempImage;
for (img = 0; img < srcDepth; img++) {
const GLint srcStride = _mesa_image_row_stride(srcPacking,
srcWidth, srcFormat,
srcType);
const GLubyte *src
= (const GLubyte *) _mesa_image_address(dims, srcPacking, srcAddr,
srcWidth, srcHeight,
srcFormat, srcType,
img, 0, 0);
for (row = 0; row < srcHeight; row++) {
_mesa_unpack_color_span_chan(ctx, srcWidth, logicalBaseFormat, dst,
srcFormat, srcType, src, srcPacking,
transferOps);
dst += srcWidth * components;
src += srcStride;
}
}
/* If we made a temporary image for convolution, free it here */
if (freeSrcImage) {
_mesa_free((void *) srcAddr);
}
if (logicalBaseFormat != textureBaseFormat) {
/* one more conversion step */
GLint texComponents = _mesa_components_in_format(textureBaseFormat);
GLint logComponents = _mesa_components_in_format(logicalBaseFormat);
GLchan *newImage;
GLint i, n;
GLubyte map[6];
/* we only promote up to RGB, RGBA and LUMINANCE_ALPHA formats for now */
ASSERT(textureBaseFormat == GL_RGB || textureBaseFormat == GL_RGBA ||
textureBaseFormat == GL_LUMINANCE_ALPHA);
/* The actual texture format should have at least as many components
* as the logical texture format.
*/
ASSERT(texComponents >= logComponents);
newImage = (GLchan *) _mesa_malloc(srcWidth * srcHeight * srcDepth
* texComponents * sizeof(GLchan));
if (!newImage) {
_mesa_free(tempImage);
return NULL;
}
compute_component_mapping(logicalBaseFormat, textureBaseFormat, map);
n = srcWidth * srcHeight * srcDepth;
for (i = 0; i < n; i++) {
GLint k;
for (k = 0; k < texComponents; k++) {
GLint j = map[k];
if (j == ZERO)
newImage[i * texComponents + k] = 0;
else if (j == ONE)
newImage[i * texComponents + k] = CHAN_MAX;
else
newImage[i * texComponents + k] = tempImage[i * logComponents + j];
}
}
_mesa_free(tempImage);
tempImage = newImage;
}
return tempImage;
}
/**
* Copy GLubyte pixels from <src> to <dst> with swizzling.
* \param dst destination pixels
* \param dstComponents number of color components in destination pixels
* \param src source pixels
* \param srcComponents number of color components in source pixels
* \param map the swizzle mapping
* \param count number of pixels to copy/swizzle.
*/
static void
swizzle_copy(GLubyte *dst, GLuint dstComponents, const GLubyte *src,
GLuint srcComponents, const GLubyte *map, GLuint count)
{
GLubyte tmp[8];
GLint i;
tmp[ZERO] = 0x0;
tmp[ONE] = 0xff;
switch (dstComponents) {
case 4:
for (i = 0; i < count; i++) {
COPY_4UBV(tmp, src);
src += srcComponents;
dst[0] = tmp[map[0]];
dst[1] = tmp[map[1]];
dst[2] = tmp[map[2]];
dst[3] = tmp[map[3]];
dst += 4;
}
break;
case 3:
for (i = 0; i < count; i++) {
COPY_4UBV(tmp, src);
src += srcComponents;
dst[0] = tmp[map[0]];
dst[1] = tmp[map[1]];
dst[2] = tmp[map[2]];
dst += 3;
}
break;
case 2:
for (i = 0; i < count; i++) {
COPY_4UBV(tmp, src);
src += srcComponents;
dst[0] = tmp[map[0]];
dst[1] = tmp[map[1]];
dst += 2;
}
break;
}
}
/**
* Transfer a GLubyte texture image with component swizzling.
*/
static void
_mesa_swizzle_ubyte_image(GLcontext *ctx,
GLuint dimensions,
GLenum srcFormat,
const GLubyte *dstmap, GLint dstComponents,
GLvoid *dstAddr,
GLint dstXoffset, GLint dstYoffset, GLint dstZoffset,
GLint dstRowStride, GLint dstImageStride,
GLint srcWidth, GLint srcHeight, GLint srcDepth,
const GLvoid *srcAddr,
const struct gl_pixelstore_attrib *srcPacking )
{
GLint srcComponents = _mesa_components_in_format(srcFormat);
GLubyte srcmap[6], map[4];
GLint i;
const GLint srcRowStride =
_mesa_image_row_stride(srcPacking, srcWidth,
srcFormat, GL_UNSIGNED_BYTE);
const GLint srcImageStride
= _mesa_image_image_stride(srcPacking, srcWidth, srcHeight, srcFormat,
GL_UNSIGNED_BYTE);
const GLubyte *srcImage
= (const GLubyte *) _mesa_image_address(dimensions, srcPacking, srcAddr,
srcWidth, srcHeight, srcFormat,
GL_UNSIGNED_BYTE, 0, 0, 0);
GLubyte *dstImage = (GLubyte *) dstAddr
+ dstZoffset * dstImageStride
+ dstYoffset * dstRowStride
+ dstXoffset * dstComponents;
compute_component_mapping(srcFormat, GL_RGBA, srcmap);
for (i = 0; i < 4; i++)
map[i] = srcmap[dstmap[i]];
if (srcRowStride == srcWidth * srcComponents &&
(srcImageStride == srcWidth * srcHeight * srcComponents ||
srcDepth == 1)) {
swizzle_copy(dstImage, dstComponents, srcImage, srcComponents, map,
srcWidth * srcHeight * srcDepth);
}
else {
GLint img, row;
for (img = 0; img < srcDepth; img++) {
const GLubyte *srcRow = srcImage;
GLubyte *dstRow = dstImage;
for (row = 0; row < srcHeight; row++) {
swizzle_copy(dstRow, dstComponents, srcRow, srcComponents, map, srcWidth);
dstRow += dstRowStride;
srcRow += srcRowStride;
}
srcImage += srcImageStride;
dstImage += dstImageStride;
}
}
}
/**
* Teximage storage routine for when a simple memcpy will do.
* No pixel transfer operations or special texel encodings allowed.
* 1D, 2D and 3D images supported.
*/
static void
memcpy_texture(GLuint dimensions,
const struct gl_texture_format *dstFormat,
GLvoid *dstAddr,
GLint dstXoffset, GLint dstYoffset, GLint dstZoffset,
GLint dstRowStride, GLint dstImageStride,
GLint srcWidth, GLint srcHeight, GLint srcDepth,
GLenum srcFormat, GLenum srcType,
const GLvoid *srcAddr,
const struct gl_pixelstore_attrib *srcPacking)
{
const GLint srcRowStride = _mesa_image_row_stride(srcPacking, srcWidth,
srcFormat, srcType);
const GLint srcImageStride = _mesa_image_image_stride(srcPacking,
srcWidth, srcHeight, srcFormat, srcType);
const GLubyte *srcImage = (const GLubyte *) _mesa_image_address(dimensions,
srcPacking, srcAddr, srcWidth, srcHeight, srcFormat, srcType, 0, 0, 0);
const GLint bytesPerRow = srcWidth * dstFormat->TexelBytes;
const GLint bytesPerImage = srcHeight * bytesPerRow;
const GLint bytesPerTexture = srcDepth * bytesPerImage;
GLubyte *dstImage = (GLubyte *) dstAddr
+ dstZoffset * dstImageStride
+ dstYoffset * dstRowStride
+ dstXoffset * dstFormat->TexelBytes;
if (dstRowStride == srcRowStride &&
dstRowStride == bytesPerRow &&
((dstImageStride == srcImageStride &&
dstImageStride == bytesPerImage) ||
(srcDepth == 1))) {
/* one big memcpy */
_mesa_memcpy(dstImage, srcImage, bytesPerTexture);
}
else {
GLint img, row;
for (img = 0; img < srcDepth; img++) {
const GLubyte *srcRow = srcImage;
GLubyte *dstRow = dstImage;
for (row = 0; row < srcHeight; row++) {
_mesa_memcpy(dstRow, srcRow, bytesPerRow);
dstRow += dstRowStride;
srcRow += srcRowStride;
}
srcImage += srcImageStride;
dstImage += dstImageStride;
}
}
}
/**
* Store an image in any of the formats:
* _mesa_texformat_rgba
* _mesa_texformat_rgb
* _mesa_texformat_alpha
* _mesa_texformat_luminance
* _mesa_texformat_luminance_alpha
* _mesa_texformat_intensity
*
* \param dims either 1 or 2 or 3
* \param baseInternalFormat user-specified base internal format
* \param dstFormat destination Mesa texture format
* \param dstAddr destination image address
* \param dstX/Y/Zoffset destination x/y/z offset (ala TexSubImage), in texels
* \param dstRowStride destination image row stride, in bytes
* \param dstImageStride destination image layer stride, in bytes
* \param srcWidth/Height/Depth source image size, in pixels
* \param srcFormat incoming image format
* \param srcType incoming image data type
* \param srcAddr source image address
* \param srcPacking source image packing parameters
*/
GLboolean
_mesa_texstore_rgba(GLcontext *ctx, GLuint dims,
GLenum baseInternalFormat,
const struct gl_texture_format *dstFormat,
GLvoid *dstAddr,
GLint dstXoffset, GLint dstYoffset, GLint dstZoffset,
GLint dstRowStride, GLint dstImageStride,
GLint srcWidth, GLint srcHeight, GLint srcDepth,
GLenum srcFormat, GLenum srcType,
const GLvoid *srcAddr,
const struct gl_pixelstore_attrib *srcPacking)
{
const GLint components = _mesa_components_in_format(baseInternalFormat);
ASSERT(dstFormat == &_mesa_texformat_rgba ||
dstFormat == &_mesa_texformat_rgb ||
dstFormat == &_mesa_texformat_alpha ||
dstFormat == &_mesa_texformat_luminance ||
dstFormat == &_mesa_texformat_luminance_alpha ||
dstFormat == &_mesa_texformat_intensity);
ASSERT(baseInternalFormat == GL_RGBA ||
baseInternalFormat == GL_RGB ||
baseInternalFormat == GL_ALPHA ||
baseInternalFormat == GL_LUMINANCE ||
baseInternalFormat == GL_LUMINANCE_ALPHA ||
baseInternalFormat == GL_INTENSITY);
ASSERT(dstFormat->TexelBytes == components * sizeof(GLchan));
if (!ctx->_ImageTransferState &&
!srcPacking->SwapBytes &&
baseInternalFormat == srcFormat &&
srcType == CHAN_TYPE) {
/* simple memcpy path */
memcpy_texture(dims,
dstFormat, dstAddr, dstXoffset, dstYoffset, dstZoffset,
dstRowStride, dstImageStride,
srcWidth, srcHeight, srcDepth, srcFormat, srcType,
srcAddr, srcPacking);
}
else if (!ctx->_ImageTransferState &&
!srcPacking->SwapBytes &&
dstFormat == &_mesa_texformat_rgb &&
srcFormat == GL_RGBA &&
srcType == CHAN_TYPE) {
/* extract RGB from RGBA */
int img, row, col;
GLchan *dstImage = (GLchan *) (GLubyte *) dstAddr
+ dstZoffset * dstImageStride
+ dstYoffset * dstRowStride
+ dstXoffset * dstFormat->TexelBytes;
for (img = 0; img < srcDepth; img++) {
const GLint srcRowStride = _mesa_image_row_stride(srcPacking,
srcWidth, srcFormat, srcType);
GLchan *srcRow = (GLchan *) _mesa_image_address(dims, srcPacking,
srcAddr, srcWidth, srcHeight, srcFormat, srcType, img, 0, 0);
GLchan *dstRow = dstImage;
for (row = 0; row < srcHeight; row++) {
for (col = 0; col < srcWidth; col++) {
dstRow[col * 3 + RCOMP] = srcRow[col * 4 + RCOMP];
dstRow[col * 3 + GCOMP] = srcRow[col * 4 + GCOMP];
dstRow[col * 3 + BCOMP] = srcRow[col * 4 + BCOMP];
}
dstRow += dstRowStride;
srcRow = (GLchan *) ((GLubyte *) srcRow + srcRowStride);
}
dstImage += dstImageStride;
}
}
else {
/* general path */
const GLchan *tempImage = _mesa_make_temp_chan_image(ctx, dims,
baseInternalFormat,
dstFormat->BaseFormat,
srcWidth, srcHeight, srcDepth,
srcFormat, srcType, srcAddr,
srcPacking);
const GLchan *src = tempImage;
GLint bytesPerRow;
GLubyte *dstImage = (GLubyte *) dstAddr
+ dstZoffset * dstImageStride
+ dstYoffset * dstRowStride
+ dstXoffset * dstFormat->TexelBytes;
GLint img, row;
if (!tempImage)
return GL_FALSE;
_mesa_adjust_image_for_convolution(ctx, dims, &srcWidth, &srcHeight);
bytesPerRow = srcWidth * components * sizeof(GLchan);
for (img = 0; img < srcDepth; img++) {
GLubyte *dstRow = dstImage;
for (row = 0; row < srcHeight; row++) {
_mesa_memcpy(dstRow, src, bytesPerRow);
dstRow += dstRowStride;
src += srcWidth * components;
}
dstImage += dstImageStride;
}
_mesa_free((void *) tempImage);
}
return GL_TRUE;
}
/**
* Store a floating point depth component texture image.
*/
GLboolean
_mesa_texstore_depth_component_float32(STORE_PARAMS)
{
(void) dims;
ASSERT(dstFormat == &_mesa_texformat_depth_component_float32);
ASSERT(dstFormat->TexelBytes == sizeof(GLfloat));
if (!ctx->_ImageTransferState &&
!srcPacking->SwapBytes &&
baseInternalFormat == GL_DEPTH_COMPONENT &&
srcFormat == GL_DEPTH_COMPONENT &&
srcType == GL_FLOAT) {
/* simple memcpy path */
memcpy_texture(dims,
dstFormat, dstAddr, dstXoffset, dstYoffset, dstZoffset,
dstRowStride, dstImageStride,
srcWidth, srcHeight, srcDepth, srcFormat, srcType,
srcAddr, srcPacking);
}
else {
/* general path */
GLubyte *dstImage = (GLubyte *) dstAddr
+ dstZoffset * dstImageStride
+ dstYoffset * dstRowStride
+ dstXoffset * dstFormat->TexelBytes;
GLint img, row;
for (img = 0; img < srcDepth; img++) {
GLubyte *dstRow = dstImage;
for (row = 0; row < srcHeight; row++) {
const GLvoid *src = _mesa_image_address(dims, srcPacking,
srcAddr, srcWidth, srcHeight, srcFormat, srcType, img, row, 0);
_mesa_unpack_depth_span(ctx, srcWidth, (GLfloat *) dstRow,
srcType, src, srcPacking);
dstRow += dstRowStride;
}
dstImage += dstImageStride;
}
}
return GL_TRUE;
}
/**
* Store a 16-bit integer depth component texture image.
*/
GLboolean
_mesa_texstore_depth_component16(STORE_PARAMS)
{
(void) dims;
ASSERT(dstFormat == &_mesa_texformat_depth_component16);
ASSERT(dstFormat->TexelBytes == sizeof(GLushort));
if (!ctx->_ImageTransferState &&
!srcPacking->SwapBytes &&
baseInternalFormat == GL_DEPTH_COMPONENT &&
srcFormat == GL_DEPTH_COMPONENT &&
srcType == GL_UNSIGNED_SHORT) {
/* simple memcpy path */
memcpy_texture(dims,
dstFormat, dstAddr, dstXoffset, dstYoffset, dstZoffset,
dstRowStride, dstImageStride,
srcWidth, srcHeight, srcDepth, srcFormat, srcType,
srcAddr, srcPacking);
}
else {
/* general path */
GLubyte *dstImage = (GLubyte *) dstAddr
+ dstZoffset * dstImageStride
+ dstYoffset * dstRowStride
+ dstXoffset * dstFormat->TexelBytes;
GLint img, row, col;
for (img = 0; img < srcDepth; img++) {
GLubyte *dstRow = dstImage;
for (row = 0; row < srcHeight; row++) {
GLfloat depthTemp[MAX_WIDTH];
const GLvoid *src = _mesa_image_address(dims, srcPacking,
srcAddr, srcWidth, srcHeight, srcFormat, srcType, img, row, 0);
GLushort *dst16 = (GLushort *) dstRow;
_mesa_unpack_depth_span(ctx, srcWidth, depthTemp,
srcType, src, srcPacking);
for (col = 0; col < srcWidth; col++) {
dst16[col] = (GLushort) (depthTemp[col] * 65535.0F);
}
dstRow += dstRowStride;
}
dstImage += dstImageStride;
}
}
return GL_TRUE;
}
/**
* Store an rgb565 or rgb565_rev texture image.
*/
GLboolean
_mesa_texstore_rgb565(STORE_PARAMS)
{
ASSERT(dstFormat == &_mesa_texformat_rgb565 ||
dstFormat == &_mesa_texformat_rgb565_rev);
ASSERT(dstFormat->TexelBytes == 2);
if (!ctx->_ImageTransferState &&
!srcPacking->SwapBytes &&
dstFormat == &_mesa_texformat_rgb565 &&
baseInternalFormat == GL_RGB &&
srcFormat == GL_RGB &&
srcType == GL_UNSIGNED_SHORT_5_6_5) {
/* simple memcpy path */
memcpy_texture(dims,
dstFormat, dstAddr, dstXoffset, dstYoffset, dstZoffset,
dstRowStride, dstImageStride,
srcWidth, srcHeight, srcDepth, srcFormat, srcType,
srcAddr, srcPacking);
}
else if (!ctx->_ImageTransferState &&
!srcPacking->SwapBytes &&
baseInternalFormat == GL_RGB &&
srcFormat == GL_RGB &&
srcType == GL_UNSIGNED_BYTE &&
dims == 2) {
/* do optimized tex store */
const GLint srcRowStride = _mesa_image_row_stride(srcPacking, srcWidth,
srcFormat, srcType);
const GLubyte *src = (const GLubyte *)
_mesa_image_address(dims, srcPacking, srcAddr, srcWidth, srcHeight,
srcFormat, srcType, 0, 0, 0);
GLubyte *dst = (GLubyte *) dstAddr
+ dstZoffset * dstImageStride
+ dstYoffset * dstRowStride
+ dstXoffset * dstFormat->TexelBytes;
GLint row, col;
for (row = 0; row < srcHeight; row++) {
const GLubyte *srcUB = (const GLubyte *) src;
GLushort *dstUS = (GLushort *) dst;
/* check for byteswapped format */
if (dstFormat == &_mesa_texformat_rgb565) {
for (col = 0; col < srcWidth; col++) {
dstUS[col] = PACK_COLOR_565( srcUB[0], srcUB[1], srcUB[2] );
srcUB += 3;
}
}
else {
for (col = 0; col < srcWidth; col++) {
dstUS[col] = PACK_COLOR_565_REV( srcUB[0], srcUB[1], srcUB[2] );
srcUB += 3;
}
}
dst += dstRowStride;
src += srcRowStride;
}
}
else {
/* general path */
const GLchan *tempImage = _mesa_make_temp_chan_image(ctx, dims,
baseInternalFormat,
dstFormat->BaseFormat,
srcWidth, srcHeight, srcDepth,
srcFormat, srcType, srcAddr,
srcPacking);
const GLchan *src = tempImage;
GLubyte *dstImage = (GLubyte *) dstAddr
+ dstZoffset * dstImageStride
+ dstYoffset * dstRowStride
+ dstXoffset * dstFormat->TexelBytes;
GLint img, row, col;
if (!tempImage)
return GL_FALSE;
_mesa_adjust_image_for_convolution(ctx, dims, &srcWidth, &srcHeight);
for (img = 0; img < srcDepth; img++) {
GLubyte *dstRow = dstImage;
for (row = 0; row < srcHeight; row++) {
GLushort *dstUS = (GLushort *) dstRow;
/* check for byteswapped format */
if (dstFormat == &_mesa_texformat_rgb565) {
for (col = 0; col < srcWidth; col++) {
dstUS[col] = PACK_COLOR_565( CHAN_TO_UBYTE(src[RCOMP]),
CHAN_TO_UBYTE(src[GCOMP]),
CHAN_TO_UBYTE(src[BCOMP]) );
src += 3;
}
}
else {
for (col = 0; col < srcWidth; col++) {
dstUS[col] = PACK_COLOR_565_REV( CHAN_TO_UBYTE(src[RCOMP]),
CHAN_TO_UBYTE(src[GCOMP]),
CHAN_TO_UBYTE(src[BCOMP]) );
src += 3;
}
}
dstRow += dstRowStride;
}
dstImage += dstImageStride;
}
_mesa_free((void *) tempImage);
}
return GL_TRUE;
}
GLboolean
_mesa_texstore_rgba8888(STORE_PARAMS)
{
const GLuint ui = 1;
const GLubyte littleEndian = *((const GLubyte *) &ui);
(void)littleEndian;
ASSERT(dstFormat == &_mesa_texformat_rgba8888 ||
dstFormat == &_mesa_texformat_rgba8888_rev);
ASSERT(dstFormat->TexelBytes == 4);
if (!ctx->_ImageTransferState &&
!srcPacking->SwapBytes &&
dstFormat == &_mesa_texformat_rgba8888 &&
baseInternalFormat == GL_RGBA &&
((srcFormat == GL_RGBA && srcType == GL_UNSIGNED_INT_8_8_8_8) ||
(srcFormat == GL_ABGR_EXT && srcType == GL_UNSIGNED_INT_8_8_8_8_REV))) {
/* simple memcpy path */
memcpy_texture(dims,
dstFormat, dstAddr, dstXoffset, dstYoffset, dstZoffset,
dstRowStride, dstImageStride,
srcWidth, srcHeight, srcDepth, srcFormat, srcType,
srcAddr, srcPacking);
}
#if 0
else if (!ctx->_ImageTransferState &&
!srcPacking->SwapBytes &&
srcType == GL_UNSIGNED_BYTE &&
dstFormat == &_mesa_texformat_rgba8888 &&
littleEndian &&
can_swizzle(srcFormat)) {
GLubyte dstmap[4];
/* dstmap - how to swizzle from GL_RGBA to dst format:
*
* FIXME - add !litteEndian and _rev varients:
*/
dstmap[3] = 0;
dstmap[2] = 1;
dstmap[1] = 2;
dstmap[0] = 3;
_mesa_swizzle_ubyte_image(ctx, dims,
srcFormat,
dstmap, 4,
dstAddr, dstXoffset, dstYoffset, dstZoffset,
dstRowStride, dstImageStride,
srcWidth, srcHeight, srcDepth, srcAddr,
srcPacking);
}
#endif
else {
/* general path */
const GLchan *tempImage = _mesa_make_temp_chan_image(ctx, dims,
baseInternalFormat,
dstFormat->BaseFormat,
srcWidth, srcHeight, srcDepth,
srcFormat, srcType, srcAddr,
srcPacking);
const GLchan *src = tempImage;
GLubyte *dstImage = (GLubyte *) dstAddr
+ dstZoffset * dstImageStride
+ dstYoffset * dstRowStride
+ dstXoffset * dstFormat->TexelBytes;
GLint img, row, col;
if (!tempImage)
return GL_FALSE;
_mesa_adjust_image_for_convolution(ctx, dims, &srcWidth, &srcHeight);
for (img = 0; img < srcDepth; img++) {
GLubyte *dstRow = dstImage;
for (row = 0; row < srcHeight; row++) {
GLuint *dstUI = (GLuint *) dstRow;
if (dstFormat == &_mesa_texformat_rgba8888) {
for (col = 0; col < srcWidth; col++) {
dstUI[col] = PACK_COLOR_8888( CHAN_TO_UBYTE(src[RCOMP]),
CHAN_TO_UBYTE(src[GCOMP]),
CHAN_TO_UBYTE(src[BCOMP]),
CHAN_TO_UBYTE(src[ACOMP]) );
src += 4;
}
}
else {
for (col = 0; col < srcWidth; col++) {
dstUI[col] = PACK_COLOR_8888_REV( CHAN_TO_UBYTE(src[RCOMP]),
CHAN_TO_UBYTE(src[GCOMP]),
CHAN_TO_UBYTE(src[BCOMP]),
CHAN_TO_UBYTE(src[ACOMP]) );
src += 4;
}
}
dstRow += dstRowStride;
}
dstImage += dstImageStride;
}
_mesa_free((void *) tempImage);
}
return GL_TRUE;
}
GLboolean
_mesa_texstore_argb8888(STORE_PARAMS)
{
const GLuint ui = 1;
const GLubyte littleEndian = *((const GLubyte *) &ui);
ASSERT(dstFormat == &_mesa_texformat_argb8888 ||
dstFormat == &_mesa_texformat_argb8888_rev);
ASSERT(dstFormat->TexelBytes == 4);
if (!ctx->_ImageTransferState &&
!srcPacking->SwapBytes &&
dstFormat == &_mesa_texformat_argb8888 &&
baseInternalFormat == GL_RGBA &&
srcFormat == GL_BGRA &&
((srcType == GL_UNSIGNED_BYTE && littleEndian) ||
srcType == GL_UNSIGNED_INT_8_8_8_8_REV)) {
/* simple memcpy path (little endian) */
memcpy_texture(dims,
dstFormat, dstAddr, dstXoffset, dstYoffset, dstZoffset,
dstRowStride, dstImageStride,
srcWidth, srcHeight, srcDepth, srcFormat, srcType,
srcAddr, srcPacking);
}
else if (!ctx->_ImageTransferState &&
!srcPacking->SwapBytes &&
dstFormat == &_mesa_texformat_argb8888_rev &&
baseInternalFormat == GL_RGBA &&
srcFormat == GL_BGRA &&
((srcType == GL_UNSIGNED_BYTE && !littleEndian) ||
srcType == GL_UNSIGNED_INT_8_8_8_8)) {
/* simple memcpy path (big endian) */
memcpy_texture(dims,
dstFormat, dstAddr, dstXoffset, dstYoffset, dstZoffset,
dstRowStride, dstImageStride,
srcWidth, srcHeight, srcDepth, srcFormat, srcType,
srcAddr, srcPacking);
}
else if (!ctx->_ImageTransferState &&
!srcPacking->SwapBytes &&
dstFormat == &_mesa_texformat_argb8888 &&
srcFormat == GL_RGB &&
srcType == GL_UNSIGNED_BYTE) {
int img, row, col;
GLubyte *dstImage = (GLubyte *) dstAddr
+ dstZoffset * dstImageStride
+ dstYoffset * dstRowStride
+ dstXoffset * dstFormat->TexelBytes;
for (img = 0; img < srcDepth; img++) {
const GLint srcRowStride = _mesa_image_row_stride(srcPacking,
srcWidth, srcFormat, srcType);
GLubyte *srcRow = (GLubyte *) _mesa_image_address(dims, srcPacking,
srcAddr, srcWidth, srcHeight, srcFormat, srcType, img, 0, 0);
GLubyte *dstRow = dstImage;
for (row = 0; row < srcHeight; row++) {
for (col = 0; col < srcWidth; col++) {
dstRow[col * 4 + 0] = srcRow[col * 3 + BCOMP];
dstRow[col * 4 + 1] = srcRow[col * 3 + GCOMP];
dstRow[col * 4 + 2] = srcRow[col * 3 + RCOMP];
dstRow[col * 4 + 3] = 0xff;
}
dstRow += dstRowStride;
srcRow += srcRowStride;
}
dstImage += dstImageStride;
}
}
else if (!ctx->_ImageTransferState &&
!srcPacking->SwapBytes &&
dstFormat == &_mesa_texformat_argb8888 &&
srcFormat == GL_RGBA &&
srcType == GL_UNSIGNED_BYTE) {
int img, row, col;
GLubyte *dstImage = (GLubyte *) dstAddr
+ dstZoffset * dstImageStride
+ dstYoffset * dstRowStride
+ dstXoffset * dstFormat->TexelBytes;
for (img = 0; img < srcDepth; img++) {
const GLint srcRowStride = _mesa_image_row_stride(srcPacking,
srcWidth, srcFormat, srcType);
GLubyte *srcRow = (GLubyte *) _mesa_image_address(dims, srcPacking,
srcAddr, srcWidth, srcHeight, srcFormat, srcType, img, 0, 0);
GLubyte *dstRow = dstImage;
for (row = 0; row < srcHeight; row++) {
for (col = 0; col < srcWidth; col++) {
dstRow[col * 4 + 0] = srcRow[col * 4 + BCOMP];
dstRow[col * 4 + 1] = srcRow[col * 4 + GCOMP];
dstRow[col * 4 + 2] = srcRow[col * 4 + RCOMP];
dstRow[col * 4 + 3] = srcRow[col * 4 + ACOMP];
}
dstRow += dstRowStride;
srcRow += srcRowStride;
}
dstImage += dstImageStride;
}
}
else if (!ctx->_ImageTransferState &&
!srcPacking->SwapBytes &&
dstFormat == &_mesa_texformat_argb8888 &&
srcType == GL_UNSIGNED_BYTE &&
littleEndian &&
can_swizzle(srcFormat)) {
GLubyte dstmap[4];
/* dstmap - how to swizzle from GL_RGBA to dst format:
*/
dstmap[3] = 3; /* alpha */
dstmap[2] = 0; /* red */
dstmap[1] = 1; /* green */
dstmap[0] = 2; /* blue */
_mesa_swizzle_ubyte_image(ctx, dims,
srcFormat,
dstmap, 4,
dstAddr, dstXoffset, dstYoffset, dstZoffset,
dstRowStride, dstImageStride,
srcWidth, srcHeight, srcDepth, srcAddr,
srcPacking);
}
else {
/* general path */
const GLchan *tempImage = _mesa_make_temp_chan_image(ctx, dims,
baseInternalFormat,
dstFormat->BaseFormat,
srcWidth, srcHeight, srcDepth,
srcFormat, srcType, srcAddr,
srcPacking);
const GLchan *src = tempImage;
GLubyte *dstImage = (GLubyte *) dstAddr
+ dstZoffset * dstImageStride
+ dstYoffset * dstRowStride
+ dstXoffset * dstFormat->TexelBytes;
GLint img, row, col;
if (!tempImage)
return GL_FALSE;
_mesa_adjust_image_for_convolution(ctx, dims, &srcWidth, &srcHeight);
for (img = 0; img < srcDepth; img++) {
GLubyte *dstRow = dstImage;
for (row = 0; row < srcHeight; row++) {
GLuint *dstUI = (GLuint *) dstRow;
if (dstFormat == &_mesa_texformat_argb8888) {
for (col = 0; col < srcWidth; col++) {
dstUI[col] = PACK_COLOR_8888( CHAN_TO_UBYTE(src[ACOMP]),
CHAN_TO_UBYTE(src[RCOMP]),
CHAN_TO_UBYTE(src[GCOMP]),
CHAN_TO_UBYTE(src[BCOMP]) );
src += 4;
}
}
else {
for (col = 0; col < srcWidth; col++) {
dstUI[col] = PACK_COLOR_8888_REV( CHAN_TO_UBYTE(src[ACOMP]),
CHAN_TO_UBYTE(src[RCOMP]),
CHAN_TO_UBYTE(src[GCOMP]),
CHAN_TO_UBYTE(src[BCOMP]) );
src += 4;
}
}
dstRow += dstRowStride;
}
dstImage += dstImageStride;
}
_mesa_free((void *) tempImage);
}
return GL_TRUE;
}
GLboolean
_mesa_texstore_rgb888(STORE_PARAMS)
{
const GLuint ui = 1;
const GLubyte littleEndian = *((const GLubyte *) &ui);
ASSERT(dstFormat == &_mesa_texformat_rgb888);
ASSERT(dstFormat->TexelBytes == 3);
if (!ctx->_ImageTransferState &&
!srcPacking->SwapBytes &&
baseInternalFormat == GL_RGB &&
srcFormat == GL_BGR &&
srcType == GL_UNSIGNED_BYTE &&
littleEndian) {
/* simple memcpy path */
memcpy_texture(dims,
dstFormat, dstAddr, dstXoffset, dstYoffset, dstZoffset,
dstRowStride, dstImageStride,
srcWidth, srcHeight, srcDepth, srcFormat, srcType,
srcAddr, srcPacking);
}
else if (!ctx->_ImageTransferState &&
!srcPacking->SwapBytes &&
srcFormat == GL_RGBA &&
srcType == GL_UNSIGNED_BYTE) {
/* extract RGB from RGBA */
int img, row, col;
GLubyte *dstImage = (GLubyte *) dstAddr
+ dstZoffset * dstImageStride
+ dstYoffset * dstRowStride
+ dstXoffset * dstFormat->TexelBytes;
for (img = 0; img < srcDepth; img++) {
const GLint srcRowStride = _mesa_image_row_stride(srcPacking,
srcWidth, srcFormat, srcType);
GLubyte *srcRow = (GLubyte *) _mesa_image_address(dims, srcPacking,
srcAddr, srcWidth, srcHeight, srcFormat, srcType, img, 0, 0);
GLubyte *dstRow = dstImage;
for (row = 0; row < srcHeight; row++) {
for (col = 0; col < srcWidth; col++) {
dstRow[col * 3 + 0] = srcRow[col * 4 + BCOMP];
dstRow[col * 3 + 1] = srcRow[col * 4 + GCOMP];
dstRow[col * 3 + 2] = srcRow[col * 4 + RCOMP];
}
dstRow += dstRowStride;
srcRow += srcRowStride;
}
dstImage += dstImageStride;
}
}
else {
/* general path */
const GLchan *tempImage = _mesa_make_temp_chan_image(ctx, dims,
baseInternalFormat,
dstFormat->BaseFormat,
srcWidth, srcHeight, srcDepth,
srcFormat, srcType, srcAddr,
srcPacking);
const GLchan *src = (const GLchan *) tempImage;
GLubyte *dstImage = (GLubyte *) dstAddr
+ dstZoffset * dstImageStride
+ dstYoffset * dstRowStride
+ dstXoffset * dstFormat->TexelBytes;
GLint img, row, col;
if (!tempImage)
return GL_FALSE;
_mesa_adjust_image_for_convolution(ctx, dims, &srcWidth, &srcHeight);
for (img = 0; img < srcDepth; img++) {
GLubyte *dstRow = dstImage;
for (row = 0; row < srcHeight; row++) {
#if 0
if (littleEndian) {
for (col = 0; col < srcWidth; col++) {
dstRow[col * 3 + 0] = CHAN_TO_UBYTE(src[RCOMP]);
dstRow[col * 3 + 1] = CHAN_TO_UBYTE(src[GCOMP]);
dstRow[col * 3 + 2] = CHAN_TO_UBYTE(src[BCOMP]);
srcUB += 3;
}
}
else {
for (col = 0; col < srcWidth; col++) {
dstRow[col * 3 + 0] = srcUB[BCOMP];
dstRow[col * 3 + 1] = srcUB[GCOMP];
dstRow[col * 3 + 2] = srcUB[RCOMP];
srcUB += 3;
}
}
#else
for (col = 0; col < srcWidth; col++) {
dstRow[col * 3 + 0] = CHAN_TO_UBYTE(src[BCOMP]);
dstRow[col * 3 + 1] = CHAN_TO_UBYTE(src[GCOMP]);
dstRow[col * 3 + 2] = CHAN_TO_UBYTE(src[RCOMP]);
src += 3;
}
#endif
dstRow += dstRowStride;
}
dstImage += dstImageStride;
}
_mesa_free((void *) tempImage);
}
return GL_TRUE;
}
GLboolean
_mesa_texstore_bgr888(STORE_PARAMS)
{
const GLuint ui = 1;
const GLubyte littleEndian = *((const GLubyte *) &ui);
ASSERT(dstFormat == &_mesa_texformat_bgr888);
ASSERT(dstFormat->TexelBytes == 3);
if (!ctx->_ImageTransferState &&
!srcPacking->SwapBytes &&
baseInternalFormat == GL_RGB &&
srcFormat == GL_RGB &&
srcType == GL_UNSIGNED_BYTE &&
littleEndian) {
/* simple memcpy path */
memcpy_texture(dims,
dstFormat, dstAddr, dstXoffset, dstYoffset, dstZoffset,
dstRowStride, dstImageStride,
srcWidth, srcHeight, srcDepth, srcFormat, srcType,
srcAddr, srcPacking);
}
else if (!ctx->_ImageTransferState &&
!srcPacking->SwapBytes &&
srcFormat == GL_RGBA &&
srcType == GL_UNSIGNED_BYTE) {
/* extract BGR from RGBA */
int img, row, col;
GLubyte *dstImage = (GLubyte *) dstAddr
+ dstZoffset * dstImageStride
+ dstYoffset * dstRowStride
+ dstXoffset * dstFormat->TexelBytes;
for (img = 0; img < srcDepth; img++) {
const GLint srcRowStride = _mesa_image_row_stride(srcPacking,
srcWidth, srcFormat, srcType);
GLubyte *srcRow = (GLubyte *) _mesa_image_address(dims, srcPacking,
srcAddr, srcWidth, srcHeight, srcFormat, srcType, img, 0, 0);
GLubyte *dstRow = dstImage;
for (row = 0; row < srcHeight; row++) {
for (col = 0; col < srcWidth; col++) {
dstRow[col * 3 + 0] = srcRow[col * 4 + RCOMP];
dstRow[col * 3 + 1] = srcRow[col * 4 + GCOMP];
dstRow[col * 3 + 2] = srcRow[col * 4 + BCOMP];
}
dstRow += dstRowStride;
srcRow += srcRowStride;
}
dstImage += dstImageStride;
}
}
else {
/* general path */
const GLchan *tempImage = _mesa_make_temp_chan_image(ctx, dims,
baseInternalFormat,
dstFormat->BaseFormat,
srcWidth, srcHeight, srcDepth,
srcFormat, srcType, srcAddr,
srcPacking);
const GLchan *src = (const GLchan *) tempImage;
GLubyte *dstImage = (GLubyte *) dstAddr
+ dstZoffset * dstImageStride
+ dstYoffset * dstRowStride
+ dstXoffset * dstFormat->TexelBytes;
GLint img, row, col;
if (!tempImage)
return GL_FALSE;
_mesa_adjust_image_for_convolution(ctx, dims, &srcWidth, &srcHeight);
for (img = 0; img < srcDepth; img++) {
GLubyte *dstRow = dstImage;
for (row = 0; row < srcHeight; row++) {
for (col = 0; col < srcWidth; col++) {
dstRow[col * 3 + 0] = CHAN_TO_UBYTE(src[RCOMP]);
dstRow[col * 3 + 1] = CHAN_TO_UBYTE(src[GCOMP]);
dstRow[col * 3 + 2] = CHAN_TO_UBYTE(src[BCOMP]);
src += 3;
}
dstRow += dstRowStride;
}
dstImage += dstImageStride;
}
_mesa_free((void *) tempImage);
}
return GL_TRUE;
}
GLboolean
_mesa_texstore_argb4444(STORE_PARAMS)
{
ASSERT(dstFormat == &_mesa_texformat_argb4444 ||
dstFormat == &_mesa_texformat_argb4444_rev);
ASSERT(dstFormat->TexelBytes == 2);
if (!ctx->_ImageTransferState &&
!srcPacking->SwapBytes &&
dstFormat == &_mesa_texformat_argb4444 &&
baseInternalFormat == GL_RGBA &&
srcFormat == GL_BGRA &&
srcType == GL_UNSIGNED_SHORT_4_4_4_4_REV) {
/* simple memcpy path */
memcpy_texture(dims,
dstFormat, dstAddr, dstXoffset, dstYoffset, dstZoffset,
dstRowStride, dstImageStride,
srcWidth, srcHeight, srcDepth, srcFormat, srcType,
srcAddr, srcPacking);
}
else {
/* general path */
const GLchan *tempImage = _mesa_make_temp_chan_image(ctx, dims,
baseInternalFormat,
dstFormat->BaseFormat,
srcWidth, srcHeight, srcDepth,
srcFormat, srcType, srcAddr,
srcPacking);
const GLchan *src = tempImage;
GLubyte *dstImage = (GLubyte *) dstAddr
+ dstZoffset * dstImageStride
+ dstYoffset * dstRowStride
+ dstXoffset * dstFormat->TexelBytes;
GLint img, row, col;
if (!tempImage)
return GL_FALSE;
_mesa_adjust_image_for_convolution(ctx, dims, &srcWidth, &srcHeight);
for (img = 0; img < srcDepth; img++) {
GLubyte *dstRow = dstImage;
for (row = 0; row < srcHeight; row++) {
GLushort *dstUS = (GLushort *) dstRow;
if (dstFormat == &_mesa_texformat_argb4444) {
for (col = 0; col < srcWidth; col++) {
dstUS[col] = PACK_COLOR_4444( CHAN_TO_UBYTE(src[ACOMP]),
CHAN_TO_UBYTE(src[RCOMP]),
CHAN_TO_UBYTE(src[GCOMP]),
CHAN_TO_UBYTE(src[BCOMP]) );
src += 4;
}
}
else {
for (col = 0; col < srcWidth; col++) {
dstUS[col] = PACK_COLOR_4444_REV( CHAN_TO_UBYTE(src[ACOMP]),
CHAN_TO_UBYTE(src[RCOMP]),
CHAN_TO_UBYTE(src[GCOMP]),
CHAN_TO_UBYTE(src[BCOMP]) );
src += 4;
}
}
dstRow += dstRowStride;
}
dstImage += dstImageStride;
}
_mesa_free((void *) tempImage);
}
return GL_TRUE;
}
GLboolean
_mesa_texstore_argb1555(STORE_PARAMS)
{
ASSERT(dstFormat == &_mesa_texformat_argb1555 ||
dstFormat == &_mesa_texformat_argb1555_rev);
ASSERT(dstFormat->TexelBytes == 2);
if (!ctx->_ImageTransferState &&
!srcPacking->SwapBytes &&
dstFormat == &_mesa_texformat_argb1555 &&
baseInternalFormat == GL_RGBA &&
srcFormat == GL_BGRA &&
srcType == GL_UNSIGNED_SHORT_1_5_5_5_REV) {
/* simple memcpy path */
memcpy_texture(dims,
dstFormat, dstAddr, dstXoffset, dstYoffset, dstZoffset,
dstRowStride, dstImageStride,
srcWidth, srcHeight, srcDepth, srcFormat, srcType,
srcAddr, srcPacking);
}
else {
/* general path */
const GLchan *tempImage = _mesa_make_temp_chan_image(ctx, dims,
baseInternalFormat,
dstFormat->BaseFormat,
srcWidth, srcHeight, srcDepth,
srcFormat, srcType, srcAddr,
srcPacking);
const GLchan *src =tempImage;
GLubyte *dstImage = (GLubyte *) dstAddr
+ dstZoffset * dstImageStride
+ dstYoffset * dstRowStride
+ dstXoffset * dstFormat->TexelBytes;
GLint img, row, col;
if (!tempImage)
return GL_FALSE;
_mesa_adjust_image_for_convolution(ctx, dims, &srcWidth, &srcHeight);
for (img = 0; img < srcDepth; img++) {
GLubyte *dstRow = dstImage;
for (row = 0; row < srcHeight; row++) {
GLushort *dstUS = (GLushort *) dstRow;
if (dstFormat == &_mesa_texformat_argb1555) {
for (col = 0; col < srcWidth; col++) {
dstUS[col] = PACK_COLOR_1555( CHAN_TO_UBYTE(src[ACOMP]),
CHAN_TO_UBYTE(src[RCOMP]),
CHAN_TO_UBYTE(src[GCOMP]),
CHAN_TO_UBYTE(src[BCOMP]) );
src += 4;
}
}
else {
for (col = 0; col < srcWidth; col++) {
dstUS[col] = PACK_COLOR_1555_REV( CHAN_TO_UBYTE(src[ACOMP]),
CHAN_TO_UBYTE(src[RCOMP]),
CHAN_TO_UBYTE(src[GCOMP]),
CHAN_TO_UBYTE(src[BCOMP]) );
src += 4;
}
}
dstRow += dstRowStride;
}
dstImage += dstImageStride;
}
_mesa_free((void *) tempImage);
}
return GL_TRUE;
}
GLboolean
_mesa_texstore_al88(STORE_PARAMS)
{
const GLuint ui = 1;
const GLubyte littleEndian = *((const GLubyte *) &ui);
ASSERT(dstFormat == &_mesa_texformat_al88 ||
dstFormat == &_mesa_texformat_al88_rev);
ASSERT(dstFormat->TexelBytes == 2);
if (!ctx->_ImageTransferState &&
!srcPacking->SwapBytes &&
dstFormat == &_mesa_texformat_al88 &&
baseInternalFormat == GL_LUMINANCE_ALPHA &&
srcFormat == GL_LUMINANCE_ALPHA &&
srcType == GL_UNSIGNED_BYTE &&
littleEndian) {
/* simple memcpy path */
memcpy_texture(dims,
dstFormat, dstAddr, dstXoffset, dstYoffset, dstZoffset,
dstRowStride, dstImageStride,
srcWidth, srcHeight, srcDepth, srcFormat, srcType,
srcAddr, srcPacking);
}
else {
/* general path */
const GLchan *tempImage = _mesa_make_temp_chan_image(ctx, dims,
baseInternalFormat,
dstFormat->BaseFormat,
srcWidth, srcHeight, srcDepth,
srcFormat, srcType, srcAddr,
srcPacking);
const GLchan *src = tempImage;
GLubyte *dstImage = (GLubyte *) dstAddr
+ dstZoffset * dstImageStride
+ dstYoffset * dstRowStride
+ dstXoffset * dstFormat->TexelBytes;
GLint img, row, col;
if (!tempImage)
return GL_FALSE;
_mesa_adjust_image_for_convolution(ctx, dims, &srcWidth, &srcHeight);
for (img = 0; img < srcDepth; img++) {
GLubyte *dstRow = dstImage;
for (row = 0; row < srcHeight; row++) {
GLushort *dstUS = (GLushort *) dstRow;
if (dstFormat == &_mesa_texformat_al88) {
for (col = 0; col < srcWidth; col++) {
/* src[0] is luminance, src[1] is alpha */
dstUS[col] = PACK_COLOR_88( CHAN_TO_UBYTE(src[1]),
CHAN_TO_UBYTE(src[0]) );
src += 2;
}
}
else {
for (col = 0; col < srcWidth; col++) {
/* src[0] is luminance, src[1] is alpha */
dstUS[col] = PACK_COLOR_88_REV( CHAN_TO_UBYTE(src[1]),
CHAN_TO_UBYTE(src[0]) );
src += 2;
}
}
dstRow += dstRowStride;
}
dstImage += dstImageStride;
}
_mesa_free((void *) tempImage);
}
return GL_TRUE;
}
GLboolean
_mesa_texstore_rgb332(STORE_PARAMS)
{
ASSERT(dstFormat == &_mesa_texformat_rgb332);
ASSERT(dstFormat->TexelBytes == 1);
if (!ctx->_ImageTransferState &&
!srcPacking->SwapBytes &&
baseInternalFormat == GL_RGB &&
srcFormat == GL_RGB && srcType == GL_UNSIGNED_BYTE_3_3_2) {
/* simple memcpy path */
memcpy_texture(dims,
dstFormat, dstAddr, dstXoffset, dstYoffset, dstZoffset,
dstRowStride, dstImageStride,
srcWidth, srcHeight, srcDepth, srcFormat, srcType,
srcAddr, srcPacking);
}
else {
/* general path */
const GLchan *tempImage = _mesa_make_temp_chan_image(ctx, dims,
baseInternalFormat,
dstFormat->BaseFormat,
srcWidth, srcHeight, srcDepth,
srcFormat, srcType, srcAddr,
srcPacking);
const GLchan *src = tempImage;
GLubyte *dstImage = (GLubyte *) dstAddr
+ dstZoffset * dstImageStride
+ dstYoffset * dstRowStride
+ dstXoffset * dstFormat->TexelBytes;
GLint img, row, col;
if (!tempImage)
return GL_FALSE;
_mesa_adjust_image_for_convolution(ctx, dims, &srcWidth, &srcHeight);
for (img = 0; img < srcDepth; img++) {
GLubyte *dstRow = dstImage;
for (row = 0; row < srcHeight; row++) {
for (col = 0; col < srcWidth; col++) {
dstRow[col] = PACK_COLOR_332( CHAN_TO_UBYTE(src[RCOMP]),
CHAN_TO_UBYTE(src[GCOMP]),
CHAN_TO_UBYTE(src[BCOMP]) );
src += 3;
}
dstRow += dstRowStride;
}
dstImage += dstImageStride;
}
_mesa_free((void *) tempImage);
}
return GL_TRUE;
}
/**
* Texstore for _mesa_texformat_a8, _mesa_texformat_l8, _mesa_texformat_i8.
*/
GLboolean
_mesa_texstore_a8(STORE_PARAMS)
{
ASSERT(dstFormat == &_mesa_texformat_a8 ||
dstFormat == &_mesa_texformat_l8 ||
dstFormat == &_mesa_texformat_i8);
ASSERT(dstFormat->TexelBytes == 1);
if (!ctx->_ImageTransferState &&
!srcPacking->SwapBytes &&
baseInternalFormat == srcFormat &&
srcType == GL_UNSIGNED_BYTE) {
/* simple memcpy path */
memcpy_texture(dims,
dstFormat, dstAddr, dstXoffset, dstYoffset, dstZoffset,
dstRowStride, dstImageStride,
srcWidth, srcHeight, srcDepth, srcFormat, srcType,
srcAddr, srcPacking);
}
else {
/* general path */
const GLchan *tempImage = _mesa_make_temp_chan_image(ctx, dims,
baseInternalFormat,
dstFormat->BaseFormat,
srcWidth, srcHeight, srcDepth,
srcFormat, srcType, srcAddr,
srcPacking);
const GLchan *src = tempImage;
GLubyte *dstImage = (GLubyte *) dstAddr
+ dstZoffset * dstImageStride
+ dstYoffset * dstRowStride
+ dstXoffset * dstFormat->TexelBytes;
GLint img, row, col;
if (!tempImage)
return GL_FALSE;
_mesa_adjust_image_for_convolution(ctx, dims, &srcWidth, &srcHeight);
for (img = 0; img < srcDepth; img++) {
GLubyte *dstRow = dstImage;
for (row = 0; row < srcHeight; row++) {
for (col = 0; col < srcWidth; col++) {
dstRow[col] = CHAN_TO_UBYTE(src[col]);
}
dstRow += dstRowStride;
src += srcWidth;
}
dstImage += dstImageStride;
}
_mesa_free((void *) tempImage);
}
return GL_TRUE;
}
GLboolean
_mesa_texstore_ci8(STORE_PARAMS)
{
(void) dims; (void) baseInternalFormat;
ASSERT(dstFormat == &_mesa_texformat_ci8);
ASSERT(dstFormat->TexelBytes == 1);
ASSERT(baseInternalFormat == GL_COLOR_INDEX);
if (!ctx->_ImageTransferState &&
!srcPacking->SwapBytes &&
srcFormat == GL_COLOR_INDEX &&
srcType == GL_UNSIGNED_BYTE) {
/* simple memcpy path */
memcpy_texture(dims,
dstFormat, dstAddr, dstXoffset, dstYoffset, dstZoffset,
dstRowStride, dstImageStride,
srcWidth, srcHeight, srcDepth, srcFormat, srcType,
srcAddr, srcPacking);
}
else {
/* general path */
GLubyte *dstImage = (GLubyte *) dstAddr
+ dstZoffset * dstImageStride
+ dstYoffset * dstRowStride
+ dstXoffset * dstFormat->TexelBytes;
GLint img, row;
for (img = 0; img < srcDepth; img++) {
GLubyte *dstRow = dstImage;
for (row = 0; row < srcHeight; row++) {
const GLvoid *src = _mesa_image_address(dims, srcPacking,
srcAddr, srcWidth, srcHeight, srcFormat, srcType, img, row, 0);
_mesa_unpack_index_span(ctx, srcWidth, GL_UNSIGNED_BYTE, dstRow,
srcType, src, srcPacking,
ctx->_ImageTransferState);
dstRow += dstRowStride;
}
dstImage += dstImageStride;
}
}
return GL_TRUE;
}
/**
* Texstore for _mesa_texformat_ycbcr or _mesa_texformat_ycbcr_rev.
*/
GLboolean
_mesa_texstore_ycbcr(STORE_PARAMS)
{
const GLuint ui = 1;
const GLubyte littleEndian = *((const GLubyte *) &ui);
(void) ctx; (void) dims; (void) baseInternalFormat;
ASSERT((dstFormat == &_mesa_texformat_ycbcr) ||
(dstFormat == &_mesa_texformat_ycbcr_rev));
ASSERT(dstFormat->TexelBytes == 2);
ASSERT(ctx->Extensions.MESA_ycbcr_texture);
ASSERT(srcFormat == GL_YCBCR_MESA);
ASSERT((srcType == GL_UNSIGNED_SHORT_8_8_MESA) ||
(srcType == GL_UNSIGNED_SHORT_8_8_REV_MESA));
ASSERT(baseInternalFormat == GL_YCBCR_MESA);
/* always just memcpy since no pixel transfer ops apply */
memcpy_texture(dims,
dstFormat, dstAddr, dstXoffset, dstYoffset, dstZoffset,
dstRowStride, dstImageStride,
srcWidth, srcHeight, srcDepth, srcFormat, srcType,
srcAddr, srcPacking);
/* Check if we need byte swapping */
/* XXX the logic here _might_ be wrong */
if (srcPacking->SwapBytes ^
(srcType == GL_UNSIGNED_SHORT_8_8_REV_MESA) ^
(dstFormat == &_mesa_texformat_ycbcr_rev) ^
!littleEndian) {
GLushort *pImage = (GLushort *) ((GLubyte *) dstAddr
+ dstZoffset * dstImageStride
+ dstYoffset * dstRowStride
+ dstXoffset * dstFormat->TexelBytes);
GLint img, row;
for (img = 0; img < srcDepth; img++) {
GLushort *pRow = pImage;
for (row = 0; row < srcHeight; row++) {
_mesa_swap2(pRow, srcWidth);
pRow += dstRowStride;
}
pImage += dstImageStride;
}
}
return GL_TRUE;
}
/**
* Store an image in any of the formats:
* _mesa_texformat_rgba_float32
* _mesa_texformat_rgb_float32
* _mesa_texformat_alpha_float32
* _mesa_texformat_luminance_float32
* _mesa_texformat_luminance_alpha_float32
* _mesa_texformat_intensity_float32
*/
GLboolean
_mesa_texstore_rgba_float32(STORE_PARAMS)
{
const GLint components = _mesa_components_in_format(baseInternalFormat);
ASSERT(dstFormat == &_mesa_texformat_rgba_float32 ||
dstFormat == &_mesa_texformat_rgb_float32 ||
dstFormat == &_mesa_texformat_alpha_float32 ||
dstFormat == &_mesa_texformat_luminance_float32 ||
dstFormat == &_mesa_texformat_luminance_alpha_float32 ||
dstFormat == &_mesa_texformat_intensity_float32);
ASSERT(baseInternalFormat == GL_RGBA ||
baseInternalFormat == GL_RGB ||
baseInternalFormat == GL_ALPHA ||
baseInternalFormat == GL_LUMINANCE ||
baseInternalFormat == GL_LUMINANCE_ALPHA ||
baseInternalFormat == GL_INTENSITY);
ASSERT(dstFormat->TexelBytes == components * sizeof(GLfloat));
if (!ctx->_ImageTransferState &&
!srcPacking->SwapBytes &&
baseInternalFormat == srcFormat &&
srcType == GL_FLOAT) {
/* simple memcpy path */
memcpy_texture(dims,
dstFormat, dstAddr, dstXoffset, dstYoffset, dstZoffset,
dstRowStride, dstImageStride,
srcWidth, srcHeight, srcDepth, srcFormat, srcType,
srcAddr, srcPacking);
}
else {
/* general path */
const GLfloat *tempImage = make_temp_float_image(ctx, dims,
baseInternalFormat,
dstFormat->BaseFormat,
srcWidth, srcHeight, srcDepth,
srcFormat, srcType, srcAddr,
srcPacking);
const GLfloat *src = tempImage;
GLint bytesPerRow;
GLubyte *dstImage = (GLubyte *) dstAddr
+ dstZoffset * dstImageStride
+ dstYoffset * dstRowStride
+ dstXoffset * dstFormat->TexelBytes;
GLint img, row;
if (!tempImage)
return GL_FALSE;
_mesa_adjust_image_for_convolution(ctx, dims, &srcWidth, &srcHeight);
bytesPerRow = srcWidth * components * sizeof(GLfloat);
for (img = 0; img < srcDepth; img++) {
GLubyte *dst = dstImage;
for (row = 0; row < srcHeight; row++) {
_mesa_memcpy(dst, src, bytesPerRow);
dst += dstRowStride;
src += srcWidth * components;
}
dstImage += dstImageStride;
}
_mesa_free((void *) tempImage);
}
return GL_TRUE;
}
/**
* As above, but store 16-bit floats.
*/
GLboolean
_mesa_texstore_rgba_float16(STORE_PARAMS)
{
const GLint components = _mesa_components_in_format(baseInternalFormat);
ASSERT(dstFormat == &_mesa_texformat_rgba_float16 ||
dstFormat == &_mesa_texformat_rgb_float16 ||
dstFormat == &_mesa_texformat_alpha_float16 ||
dstFormat == &_mesa_texformat_luminance_float16 ||
dstFormat == &_mesa_texformat_luminance_alpha_float16 ||
dstFormat == &_mesa_texformat_intensity_float16);
ASSERT(baseInternalFormat == GL_RGBA ||
baseInternalFormat == GL_RGB ||
baseInternalFormat == GL_ALPHA ||
baseInternalFormat == GL_LUMINANCE ||
baseInternalFormat == GL_LUMINANCE_ALPHA ||
baseInternalFormat == GL_INTENSITY);
ASSERT(dstFormat->TexelBytes == components * sizeof(GLhalfARB));
if (!ctx->_ImageTransferState &&
!srcPacking->SwapBytes &&
baseInternalFormat == srcFormat &&
srcType == GL_HALF_FLOAT_ARB) {
/* simple memcpy path */
memcpy_texture(dims,
dstFormat, dstAddr, dstXoffset, dstYoffset, dstZoffset,
dstRowStride, dstImageStride,
srcWidth, srcHeight, srcDepth, srcFormat, srcType,
srcAddr, srcPacking);
}
else {
/* general path */
const GLfloat *tempImage = make_temp_float_image(ctx, dims,
baseInternalFormat,
dstFormat->BaseFormat,
srcWidth, srcHeight, srcDepth,
srcFormat, srcType, srcAddr,
srcPacking);
const GLfloat *src = tempImage;
GLubyte *dstImage = (GLubyte *) dstAddr
+ dstZoffset * dstImageStride
+ dstYoffset * dstRowStride
+ dstXoffset * dstFormat->TexelBytes;
GLint img, row;
if (!tempImage)
return GL_FALSE;
_mesa_adjust_image_for_convolution(ctx, dims, &srcWidth, &srcHeight);
for (img = 0; img < srcDepth; img++) {
GLubyte *dstRow = dstImage;
for (row = 0; row < srcHeight; row++) {
GLhalfARB *dstTexel = (GLhalfARB *) dstRow;
GLint i;
for (i = 0; i < srcWidth * components; i++) {
dstTexel[i] = _mesa_float_to_half(src[i]);
}
dstRow += dstRowStride;
src += srcWidth * components;
}
dstImage += dstImageStride;
}
_mesa_free((void *) tempImage);
}
return GL_TRUE;
}
/**
* Check if an unpack PBO is active prior to fetching a texture image.
* If so, do bounds checking and map the buffer into main memory.
* Any errors detected will be recorded.
* The caller _must_ call _mesa_unmap_teximage_pbo() too!
*/
const GLvoid *
_mesa_validate_pbo_teximage(GLcontext *ctx, GLuint dimensions,
GLsizei width, GLsizei height, GLsizei depth,
GLenum format, GLenum type, const GLvoid *pixels,
const struct gl_pixelstore_attrib *unpack,
const char *funcName)
{
GLubyte *buf;
if (unpack->BufferObj->Name == 0) {
/* no PBO */
return pixels;
}
if (!_mesa_validate_pbo_access(dimensions, unpack, width, height, depth,
format, type, pixels)) {
_mesa_error(ctx, GL_INVALID_OPERATION, funcName, "(invalid PBO access");
return NULL;
}
buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
GL_READ_ONLY_ARB, unpack->BufferObj);
if (!buf) {
_mesa_error(ctx, GL_INVALID_OPERATION, funcName, "(PBO is mapped");
return NULL;
}
return ADD_POINTERS(buf, pixels);
}
/**
* Check if an unpack PBO is active prior to fetching a compressed texture
* image.
* If so, do bounds checking and map the buffer into main memory.
* Any errors detected will be recorded.
* The caller _must_ call _mesa_unmap_teximage_pbo() too!
*/
const GLvoid *
_mesa_validate_pbo_compressed_teximage(GLcontext *ctx,
GLsizei imageSize, const GLvoid *pixels,
const struct gl_pixelstore_attrib *packing,
const char *funcName)
{
GLubyte *buf;
if (packing->BufferObj->Name == 0) {
/* not using a PBO - return pointer unchanged */
return pixels;
}
if ((const GLubyte *) pixels + imageSize >
(const GLubyte *)(uintptr_t) packing->BufferObj->Size) {
/* out of bounds read! */
_mesa_error(ctx, GL_INVALID_OPERATION, funcName, "(invalid PBO access");
return NULL;
}
buf = (GLubyte*) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
GL_READ_ONLY_ARB, packing->BufferObj);
if (!buf) {
_mesa_error(ctx, GL_INVALID_OPERATION, funcName, "(PBO is mapped");
return NULL;
}
return ADD_POINTERS(buf, pixels);
}
/**
* This function must be called after either of the validate_pbo_*_teximage()
* functions. It unmaps the PBO buffer if it was mapped earlier.
*/
void
_mesa_unmap_teximage_pbo(GLcontext *ctx,
const struct gl_pixelstore_attrib *unpack)
{
if (unpack->BufferObj->Name) {
ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
unpack->BufferObj);
}
}
/*
* This is the software fallback for Driver.TexImage1D()
* and Driver.CopyTexImage1D().
* \sa _mesa_store_teximage2d()
*/
void
_mesa_store_teximage1d(GLcontext *ctx, GLenum target, GLint level,
GLint internalFormat,
GLint width, GLint border,
GLenum format, GLenum type, const GLvoid *pixels,
const struct gl_pixelstore_attrib *packing,
struct gl_texture_object *texObj,
struct gl_texture_image *texImage)
{
GLint postConvWidth = width;
GLint sizeInBytes;
(void) border;
if (ctx->_ImageTransferState & IMAGE_CONVOLUTION_BIT) {
_mesa_adjust_image_for_convolution(ctx, 1, &postConvWidth, NULL);
}
/* choose the texture format */
assert(ctx->Driver.ChooseTextureFormat);
texImage->TexFormat = ctx->Driver.ChooseTextureFormat(ctx, internalFormat,
format, type);
assert(texImage->TexFormat);
texImage->FetchTexelc = texImage->TexFormat->FetchTexel1D;
texImage->FetchTexelf = texImage->TexFormat->FetchTexel1Df;
/* allocate memory */
if (texImage->IsCompressed)
sizeInBytes = texImage->CompressedSize;
else
sizeInBytes = postConvWidth * texImage->TexFormat->TexelBytes;
texImage->Data = MESA_PBUFFER_ALLOC(sizeInBytes);
if (!texImage->Data) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage1D");
return;
}
pixels = _mesa_validate_pbo_teximage(ctx, 1, width, 1, 1, format, type,
pixels, packing, "glTexImage1D");
if (!pixels) {
/* Note: we check for a NULL image pointer here, _after_ we allocated
* memory for the texture. That's what the GL spec calls for.
*/
return;
}
else {
const GLint dstRowStride = 0, dstImageStride = 0;
GLboolean success;
ASSERT(texImage->TexFormat->StoreImage);
success = texImage->TexFormat->StoreImage(ctx, 1, texImage->Format,
texImage->TexFormat,
texImage->Data,
0, 0, 0, /* dstX/Y/Zoffset */
dstRowStride, dstImageStride,
width, 1, 1,
format, type, pixels, packing);
if (!success) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage1D");
}
}
/* GL_SGIS_generate_mipmap */
if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
_mesa_generate_mipmap(ctx, target,
&ctx->Texture.Unit[ctx->Texture.CurrentUnit],
texObj);
}
_mesa_unmap_teximage_pbo(ctx, packing);
}
/**
* This is the software fallback for Driver.TexImage2D()
* and Driver.CopyTexImage2D().
* We store the image in heap memory. We know nothing about on-board
* VRAM here. But since most DRI drivers rely on keeping a copy of all
* textures in main memory, this routine will typically be used by
* hardware drivers too.
*
* Reasons why a driver might override this function:
* - Special memory allocation needs (VRAM, AGP, etc)
* - Unusual row/image strides or padding
* - Special housekeeping
* - Using VRAM-based Pixel Buffer Objects
*/
void
_mesa_store_teximage2d(GLcontext *ctx, GLenum target, GLint level,
GLint internalFormat,
GLint width, GLint height, GLint border,
GLenum format, GLenum type, const void *pixels,
const struct gl_pixelstore_attrib *packing,
struct gl_texture_object *texObj,
struct gl_texture_image *texImage)
{
GLint postConvWidth = width, postConvHeight = height;
GLint texelBytes, sizeInBytes;
(void) border;
if (ctx->_ImageTransferState & IMAGE_CONVOLUTION_BIT) {
_mesa_adjust_image_for_convolution(ctx, 2, &postConvWidth,
&postConvHeight);
}
/* choose the texture format */
assert(ctx->Driver.ChooseTextureFormat);
texImage->TexFormat = (*ctx->Driver.ChooseTextureFormat)(ctx,
internalFormat, format, type);
assert(texImage->TexFormat);
texImage->FetchTexelc = texImage->TexFormat->FetchTexel2D;
texImage->FetchTexelf = texImage->TexFormat->FetchTexel2Df;
texelBytes = texImage->TexFormat->TexelBytes;
/* allocate 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;
}
pixels = _mesa_validate_pbo_teximage(ctx, 2, width, height, 1, format, type,
pixels, packing, "glTexImage2D");
if (!pixels) {
/* Note: we check for a NULL image pointer here, _after_ we allocated
* memory for the texture. That's what the GL spec calls for.
*/
return;
}
else {
GLint dstRowStride, dstImageStride = 0;
GLboolean success;
if (texImage->IsCompressed) {
dstRowStride = _mesa_compressed_row_stride(texImage->IntFormat,width);
}
else {
dstRowStride = postConvWidth * texImage->TexFormat->TexelBytes;
}
ASSERT(texImage->TexFormat->StoreImage);
success = texImage->TexFormat->StoreImage(ctx, 2, texImage->Format,
texImage->TexFormat,
texImage->Data,
0, 0, 0, /* dstX/Y/Zoffset */
dstRowStride, dstImageStride,
width, height, 1,
format, type, pixels, packing);
if (!success) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage2D");
}
}
/* GL_SGIS_generate_mipmap */
if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
_mesa_generate_mipmap(ctx, target,
&ctx->Texture.Unit[ctx->Texture.CurrentUnit],
texObj);
}
_mesa_unmap_teximage_pbo(ctx, packing);
}
/**
* This is the software fallback for Driver.TexImage3D()
* and Driver.CopyTexImage3D().
* \sa _mesa_store_teximage2d()
*/
void
_mesa_store_teximage3d(GLcontext *ctx, GLenum target, GLint level,
GLint internalFormat,
GLint width, GLint height, GLint depth, GLint border,
GLenum format, GLenum type, const void *pixels,
const struct gl_pixelstore_attrib *packing,
struct gl_texture_object *texObj,
struct gl_texture_image *texImage)
{
GLint texelBytes, sizeInBytes;
(void) border;
/* choose the texture format */
assert(ctx->Driver.ChooseTextureFormat);
texImage->TexFormat = (*ctx->Driver.ChooseTextureFormat)(ctx,
internalFormat, format, type);
assert(texImage->TexFormat);
texImage->FetchTexelc = texImage->TexFormat->FetchTexel3D;
texImage->FetchTexelf = texImage->TexFormat->FetchTexel3Df;
texelBytes = texImage->TexFormat->TexelBytes;
/* allocate 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;
}
pixels = _mesa_validate_pbo_teximage(ctx, 3, width, height, depth, format,
type, pixels, packing, "glTexImage3D");
if (!pixels) {
/* Note: we check for a NULL image pointer here, _after_ we allocated
* memory for the texture. That's what the GL spec calls for.
*/
return;
}
else {
GLint dstRowStride, dstImageStride;
GLboolean success;
if (texImage->IsCompressed) {
dstRowStride = _mesa_compressed_row_stride(texImage->IntFormat,width);
dstImageStride = 0;
}
else {
dstRowStride = width * texImage->TexFormat->TexelBytes;
dstImageStride = dstRowStride * height;
}
ASSERT(texImage->TexFormat->StoreImage);
success = texImage->TexFormat->StoreImage(ctx, 3, texImage->Format,
texImage->TexFormat,
texImage->Data,
0, 0, 0, /* dstX/Y/Zoffset */
dstRowStride, dstImageStride,
width, height, depth,
format, type, pixels, packing);
if (!success) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage3D");
}
}
/* GL_SGIS_generate_mipmap */
if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
_mesa_generate_mipmap(ctx, target,
&ctx->Texture.Unit[ctx->Texture.CurrentUnit],
texObj);
}
_mesa_unmap_teximage_pbo(ctx, packing);
}
/*
* This is the software fallback for Driver.TexSubImage1D()
* and Driver.CopyTexSubImage1D().
*/
void
_mesa_store_texsubimage1d(GLcontext *ctx, GLenum target, GLint level,
GLint xoffset, GLint width,
GLenum format, GLenum type, const void *pixels,
const struct gl_pixelstore_attrib *packing,
struct gl_texture_object *texObj,
struct gl_texture_image *texImage)
{
pixels = _mesa_validate_pbo_teximage(ctx, 1, width, 1, 1, format, type,
pixels, packing, "glTexSubImage1D");
if (!pixels)
return;
{
const GLint dstRowStride = 0, dstImageStride = 0;
GLboolean success;
ASSERT(texImage->TexFormat->StoreImage);
success = texImage->TexFormat->StoreImage(ctx, 1, texImage->Format,
texImage->TexFormat,
texImage->Data,
xoffset, 0, 0, /* offsets */
dstRowStride, dstImageStride,
width, 1, 1,
format, type, pixels, packing);
if (!success) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexSubImage1D");
}
}
/* GL_SGIS_generate_mipmap */
if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
_mesa_generate_mipmap(ctx, target,
&ctx->Texture.Unit[ctx->Texture.CurrentUnit],
texObj);
}
_mesa_unmap_teximage_pbo(ctx, packing);
}
/**
* This is the software fallback for Driver.TexSubImage2D()
* and Driver.CopyTexSubImage2D().
*/
void
_mesa_store_texsubimage2d(GLcontext *ctx, GLenum target, GLint level,
GLint xoffset, GLint yoffset,
GLint width, GLint height,
GLenum format, GLenum type, const void *pixels,
const struct gl_pixelstore_attrib *packing,
struct gl_texture_object *texObj,
struct gl_texture_image *texImage)
{
pixels = _mesa_validate_pbo_teximage(ctx, 2, width, height, 1, format, type,
pixels, packing, "glTexSubImage2D");
if (!pixels)
return;
{
GLint dstRowStride = 0, dstImageStride = 0;
GLboolean success;
if (texImage->IsCompressed) {
dstRowStride = _mesa_compressed_row_stride(texImage->IntFormat,
texImage->Width);
}
else {
dstRowStride = texImage->Width * texImage->TexFormat->TexelBytes;
}
ASSERT(texImage->TexFormat->StoreImage);
success = texImage->TexFormat->StoreImage(ctx, 2, texImage->Format,
texImage->TexFormat,
texImage->Data,
xoffset, yoffset, 0,
dstRowStride, dstImageStride,
width, height, 1,
format, type, pixels, packing);
if (!success) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexSubImage2D");
}
}
/* GL_SGIS_generate_mipmap */
if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
_mesa_generate_mipmap(ctx, target,
&ctx->Texture.Unit[ctx->Texture.CurrentUnit],
texObj);
}
_mesa_unmap_teximage_pbo(ctx, packing);
}
/*
* This is the software fallback for Driver.TexSubImage3D().
* and Driver.CopyTexSubImage3D().
*/
void
_mesa_store_texsubimage3d(GLcontext *ctx, GLenum target, GLint level,
GLint xoffset, GLint yoffset, GLint zoffset,
GLint width, GLint height, GLint depth,
GLenum format, GLenum type, const void *pixels,
const struct gl_pixelstore_attrib *packing,
struct gl_texture_object *texObj,
struct gl_texture_image *texImage)
{
pixels = _mesa_validate_pbo_teximage(ctx, 3, width, height, depth, format,
type, pixels, packing,
"glTexSubImage3D");
if (!pixels)
return;
{
GLint dstRowStride, dstImageStride;
GLboolean success;
if (texImage->IsCompressed) {
dstRowStride = _mesa_compressed_row_stride(texImage->IntFormat,
texImage->Width);
dstImageStride = 0; /* XXX fix */
}
else {
dstRowStride = texImage->Width * texImage->TexFormat->TexelBytes;
dstImageStride = dstRowStride * texImage->Height;
}
ASSERT(texImage->TexFormat->StoreImage);
success = texImage->TexFormat->StoreImage(ctx, 3, texImage->Format,
texImage->TexFormat,
texImage->Data,
xoffset, yoffset, zoffset,
dstRowStride, dstImageStride,
width, height, depth,
format, type, pixels, packing);
if (!success) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexSubImage3D");
}
}
/* GL_SGIS_generate_mipmap */
if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
_mesa_generate_mipmap(ctx, target,
&ctx->Texture.Unit[ctx->Texture.CurrentUnit],
texObj);
}
_mesa_unmap_teximage_pbo(ctx, packing);
}
/*
* Fallback for Driver.CompressedTexImage1D()
*/
void
_mesa_store_compressed_teximage1d(GLcontext *ctx, GLenum target, GLint level,
GLint internalFormat,
GLint width, GLint border,
GLsizei imageSize, const GLvoid *data,
struct gl_texture_object *texObj,
struct gl_texture_image *texImage)
{
/* this space intentionally left blank */
(void) ctx;
(void) target; (void) level;
(void) internalFormat;
(void) width; (void) border;
(void) imageSize; (void) data;
(void) texObj;
(void) texImage;
}
/*
* Fallback for Driver.CompressedTexImage2D()
*/
void
_mesa_store_compressed_teximage2d(GLcontext *ctx, GLenum target, GLint level,
GLint internalFormat,
GLint width, GLint height, GLint border,
GLsizei imageSize, const GLvoid *data,
struct gl_texture_object *texObj,
struct gl_texture_image *texImage)
{
(void) width; (void) height; (void) border;
/* 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->FetchTexelc = texImage->TexFormat->FetchTexel2D;
texImage->FetchTexelf = texImage->TexFormat->FetchTexel2Df;
/* allocate storage */
texImage->Data = MESA_PBUFFER_ALLOC(imageSize);
if (!texImage->Data) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glCompressedTexImage2DARB");
return;
}
data = _mesa_validate_pbo_compressed_teximage(ctx, imageSize, data,
&ctx->Unpack,
"glCompressedTexImage2D");
if (!data)
return;
/* copy the data */
ASSERT(texImage->CompressedSize == (GLuint) imageSize);
MEMCPY(texImage->Data, data, imageSize);
/* GL_SGIS_generate_mipmap */
if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
_mesa_generate_mipmap(ctx, target,
&ctx->Texture.Unit[ctx->Texture.CurrentUnit],
texObj);
}
_mesa_unmap_teximage_pbo(ctx, &ctx->Unpack);
}
/*
* Fallback for Driver.CompressedTexImage3D()
*/
void
_mesa_store_compressed_teximage3d(GLcontext *ctx, GLenum target, GLint level,
GLint internalFormat,
GLint width, GLint height, GLint depth,
GLint border,
GLsizei imageSize, const GLvoid *data,
struct gl_texture_object *texObj,
struct gl_texture_image *texImage)
{
/* this space intentionally left blank */
(void) ctx;
(void) target; (void) level;
(void) internalFormat;
(void) width; (void) height; (void) depth;
(void) border;
(void) imageSize; (void) data;
(void) texObj;
(void) texImage;
}
/**
* 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 */
(void) ctx;
(void) target; (void) level;
(void) xoffset; (void) width;
(void) format;
(void) imageSize; (void) data;
(void) texObj;
(void) texImage;
}
/**
* 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;
(void) format;
/* 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);
data = _mesa_validate_pbo_compressed_teximage(ctx, imageSize, data,
&ctx->Unpack,
"glCompressedTexSubImage2D");
if (!data)
return;
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,
(GLubyte*) texImage->Data);
bytesPerRow = srcRowStride;
rows = height / 4;
for (i = 0; i < rows; i++) {
MEMCPY(dest, src, bytesPerRow);
dest += destRowStride;
src += srcRowStride;
}
/* GL_SGIS_generate_mipmap */
if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
_mesa_generate_mipmap(ctx, target,
&ctx->Texture.Unit[ctx->Texture.CurrentUnit],
texObj);
}
_mesa_unmap_teximage_pbo(ctx, &ctx->Unpack);
}
/**
* 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 */
(void) ctx;
(void) target; (void) level;
(void) xoffset; (void) yoffset; (void) zoffset;
(void) width; (void) height; (void) depth;
(void) format;
(void) imageSize; (void) data;
(void) texObj;
(void) texImage;
}
/*
* 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;
/* This assertion is no longer valid with non-power-of-2 textures
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:
{
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_FLOAT32:
{
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;
case MESA_FORMAT_DEPTH_COMPONENT16:
{
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) {
dst[i] = (rowA[j] + rowA[k] + rowB[j] + rowB[k]) / 4;
}
}
return;
/* Begin hardware formats */
case MESA_FORMAT_RGBA8888:
case MESA_FORMAT_RGBA8888_REV:
case MESA_FORMAT_ARGB8888:
case MESA_FORMAT_ARGB8888_REV:
{
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:
case MESA_FORMAT_BGR888:
{
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:
case MESA_FORMAT_RGB565_REV:
{
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) >> 2;
const GLint green = (rowAg0 + rowAg1 + rowBg0 + rowBg1) >> 2;
const GLint blue = (rowAb0 + rowAb1 + rowBb0 + rowBb1) >> 2;
dst[i] = (blue << 11) | (green << 5) | red;
}
}
return;
case MESA_FORMAT_ARGB4444:
case MESA_FORMAT_ARGB4444_REV:
{
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) >> 2;
const GLint green = (rowAg0 + rowAg1 + rowBg0 + rowBg1) >> 2;
const GLint blue = (rowAb0 + rowAb1 + rowBb0 + rowBb1) >> 2;
const GLint alpha = (rowAa0 + rowAa1 + rowBa0 + rowBa1) >> 2;
dst[i] = (alpha << 12) | (blue << 8) | (green << 4) | red;
}
}
return;
case MESA_FORMAT_ARGB1555:
case MESA_FORMAT_ARGB1555_REV: /* XXX broken? */
{
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) >> 2;
const GLint green = (rowAg0 + rowAg1 + rowBg0 + rowBg1) >> 2;
const GLint blue = (rowAb0 + rowAb1 + rowBb0 + rowBb1) >> 2;
const GLint alpha = (rowAa0 + rowAa1 + rowBa0 + rowBa1) >> 2;
dst[i] = (alpha << 15) | (blue << 10) | (green << 5) | red;
}
}
return;
case MESA_FORMAT_AL88:
case MESA_FORMAT_AL88_REV:
{
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) >> 2;
const GLint green = (rowAg0 + rowAg1 + rowBg0 + rowBg1) >> 2;
const GLint blue = (rowAb0 + rowAb1 + rowBb0 + rowBb1) >> 2;
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;
case MESA_FORMAT_RGBA_FLOAT32:
{
GLuint i, j, k;
const GLfloat (*rowA)[4] = (const GLfloat (*)[4]) srcRowA;
const GLfloat (*rowB)[4] = (const GLfloat (*)[4]) srcRowB;
GLfloat (*dst)[4] = (GLfloat (*)[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]) * 0.25F;
dst[i][1] = (rowA[j][1] + rowA[k][1] +
rowB[j][1] + rowB[k][1]) * 0.25F;
dst[i][2] = (rowA[j][2] + rowA[k][2] +
rowB[j][2] + rowB[k][2]) * 0.25F;
dst[i][3] = (rowA[j][3] + rowA[k][3] +
rowB[j][3] + rowB[k][3]) * 0.25F;
}
}
return;
case MESA_FORMAT_RGBA_FLOAT16:
{
GLuint i, j, k, comp;
const GLhalfARB (*rowA)[4] = (const GLhalfARB (*)[4]) srcRowA;
const GLhalfARB (*rowB)[4] = (const GLhalfARB (*)[4]) srcRowB;
GLhalfARB (*dst)[4] = (GLhalfARB (*)[4]) dstRow;
for (i = j = 0, k = k0; i < (GLuint) dstWidth;
i++, j += colStride, k += colStride) {
for (comp = 0; comp < 4; comp++) {
GLfloat aj, ak, bj, bk;
aj = _mesa_half_to_float(rowA[j][comp]);
ak = _mesa_half_to_float(rowA[k][comp]);
bj = _mesa_half_to_float(rowB[j][comp]);
bk = _mesa_half_to_float(rowB[k][comp]);
dst[i][comp] = _mesa_float_to_half((aj + ak + bj + bk) * 0.25F);
}
}
}
return;
case MESA_FORMAT_RGB_FLOAT32:
{
GLuint i, j, k;
const GLfloat (*rowA)[3] = (const GLfloat (*)[3]) srcRowA;
const GLfloat (*rowB)[3] = (const GLfloat (*)[3]) srcRowB;
GLfloat (*dst)[3] = (GLfloat (*)[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]) * 0.25F;
dst[i][1] = (rowA[j][1] + rowA[k][1] +
rowB[j][1] + rowB[k][1]) * 0.25F;
dst[i][2] = (rowA[j][2] + rowA[k][2] +
rowB[j][2] + rowB[k][2]) * 0.25F;
}
}
return;
case MESA_FORMAT_RGB_FLOAT16:
{
GLuint i, j, k, comp;
const GLhalfARB (*rowA)[3] = (const GLhalfARB (*)[3]) srcRowA;
const GLhalfARB (*rowB)[3] = (const GLhalfARB (*)[3]) srcRowB;
GLhalfARB (*dst)[3] = (GLhalfARB (*)[3]) dstRow;
for (i = j = 0, k = k0; i < (GLuint) dstWidth;
i++, j += colStride, k += colStride) {
for (comp = 0; comp < 3; comp++) {
GLfloat aj, ak, bj, bk;
aj = _mesa_half_to_float(rowA[j][comp]);
ak = _mesa_half_to_float(rowA[k][comp]);
bj = _mesa_half_to_float(rowB[j][comp]);
bk = _mesa_half_to_float(rowB[k][comp]);
dst[i][comp] = _mesa_float_to_half((aj + ak + bj + bk) * 0.25F);
}
}
}
return;
case MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32:
{
GLuint i, j, k;
const GLfloat (*rowA)[2] = (const GLfloat (*)[2]) srcRowA;
const GLfloat (*rowB)[2] = (const GLfloat (*)[2]) srcRowB;
GLfloat (*dst)[2] = (GLfloat (*)[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]) * 0.25F;
dst[i][1] = (rowA[j][1] + rowA[k][1] +
rowB[j][1] + rowB[k][1]) * 0.25F;
}
}
return;
case MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16:
{
GLuint i, j, k, comp;
const GLhalfARB (*rowA)[2] = (const GLhalfARB (*)[2]) srcRowA;
const GLhalfARB (*rowB)[2] = (const GLhalfARB (*)[2]) srcRowB;
GLhalfARB (*dst)[2] = (GLhalfARB (*)[2]) dstRow;
for (i = j = 0, k = k0; i < (GLuint) dstWidth;
i++, j += colStride, k += colStride) {
for (comp = 0; comp < 2; comp++) {
GLfloat aj, ak, bj, bk;
aj = _mesa_half_to_float(rowA[j][comp]);
ak = _mesa_half_to_float(rowA[k][comp]);
bj = _mesa_half_to_float(rowB[j][comp]);
bk = _mesa_half_to_float(rowB[k][comp]);
dst[i][comp] = _mesa_float_to_half((aj + ak + bj + bk) * 0.25F);
}
}
}
return;
case MESA_FORMAT_ALPHA_FLOAT32:
case MESA_FORMAT_LUMINANCE_FLOAT32:
case MESA_FORMAT_INTENSITY_FLOAT32:
{
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;
case MESA_FORMAT_ALPHA_FLOAT16:
case MESA_FORMAT_LUMINANCE_FLOAT16:
case MESA_FORMAT_INTENSITY_FLOAT16:
{
GLuint i, j, k;
const GLhalfARB *rowA = (const GLhalfARB *) srcRowA;
const GLhalfARB *rowB = (const GLhalfARB *) srcRowB;
GLhalfARB *dst = (GLhalfARB *) dstRow;
for (i = j = 0, k = k0; i < (GLuint) dstWidth;
i++, j += colStride, k += colStride) {
GLfloat aj, ak, bj, bk;
aj = _mesa_half_to_float(rowA[j]);
ak = _mesa_half_to_float(rowA[k]);
bj = _mesa_half_to_float(rowB[j]);
bk = _mesa_half_to_float(rowB[k]);
dst[i] = _mesa_float_to_half((aj + ak + bj + bk) * 0.25F);
}
}
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;
/* 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 = NULL;
GLubyte *dstData = NULL;
GLint level, maxLevels;
ASSERT(texObj);
/* XXX choose cube map face here??? */
srcImage = texObj->Image[0][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 */
GLuint row;
GLint 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 = (GLubyte *) MALLOC(size);
if (!srcData) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "generate mipmaps");
return;
}
dstData = (GLubyte *) 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++) {
GLuint col;
for (col = 0; col < srcImage->Width; col++) {
srcImage->FetchTexelc(srcImage, col, row, 0, 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 = _mesa_select_tex_image(ctx, texUnit, target, 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_get_tex_image(ctx, texUnit, target, level + 1);
if (!dstImage) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "generating mipmaps");
return;
}
/* 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->FetchTexelc = srcImage->FetchTexelc;
dstImage->FetchTexelf = srcImage->FetchTexelf;
ASSERT(dstImage->TexFormat);
ASSERT(dstImage->FetchTexelc);
ASSERT(dstImage->FetchTexelf);
/* 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);
dstImage->TexFormat->StoreImage(ctx, 2, dstImage->Format,
dstImage->TexFormat,
dstImage->Data,
0, 0, 0, /* dstX/Y/Zoffset */
dstRowStride, 0, /* strides */
dstWidth, dstHeight, 1, /* size */
srcFormat, CHAN_TYPE,
dstData, /* src data, actually */
&ctx->DefaultPacking);
/* swap src and dest pointers */
temp = (GLubyte *) srcData;
srcData = dstData;
dstData = temp;
}
} /* loop over mipmap levels */
}
/**
* Helper function for drivers which need to rescale texture images to
* certain aspect ratios.
* Nearest filtering only (for broken hardware that can't support
* all aspect ratios). This can be made a lot faster, but I don't
* really care enough...
*/
void
_mesa_rescale_teximage2d (GLuint bytesPerPixel,
GLuint srcStrideInPixels,
GLuint dstRowStride,
GLint srcWidth, GLint srcHeight,
GLint dstWidth, GLint dstHeight,
const GLvoid *srcImage, GLvoid *dstImage)
{
GLint row, col;
#define INNER_LOOP( TYPE, HOP, WOP ) \
for ( row = 0 ; row < dstHeight ; row++ ) { \
GLint srcRow = row HOP hScale; \
for ( col = 0 ; col < dstWidth ; col++ ) { \
GLint srcCol = col WOP wScale; \
dst[col] = src[srcRow * srcStrideInPixels + srcCol]; \
} \
dst = (TYPE *) ((GLubyte *) dst + dstRowStride); \
} \
#define RESCALE_IMAGE( TYPE ) \
do { \
const TYPE *src = (const TYPE *)srcImage; \
TYPE *dst = (TYPE *)dstImage; \
\
if ( srcHeight < dstHeight ) { \
const GLint hScale = dstHeight / srcHeight; \
if ( srcWidth < dstWidth ) { \
const GLint wScale = dstWidth / srcWidth; \
INNER_LOOP( TYPE, /, / ); \
} \
else { \
const GLint wScale = srcWidth / dstWidth; \
INNER_LOOP( TYPE, /, * ); \
} \
} \
else { \
const GLint hScale = srcHeight / dstHeight; \
if ( srcWidth < dstWidth ) { \
const GLint wScale = dstWidth / srcWidth; \
INNER_LOOP( TYPE, *, / ); \
} \
else { \
const GLint wScale = srcWidth / dstWidth; \
INNER_LOOP( TYPE, *, * ); \
} \
} \
} while (0)
switch ( bytesPerPixel ) {
case 4:
RESCALE_IMAGE( GLuint );
break;
case 2:
RESCALE_IMAGE( GLushort );
break;
case 1:
RESCALE_IMAGE( GLubyte );
break;
default:
_mesa_problem(NULL,"unexpected bytes/pixel in _mesa_rescale_teximage2d");
}
}
/**
* Upscale an image by replication, not (typical) stretching.
* We use this when the image width or height is less than a
* certain size (4, 8) and we need to upscale an image.
*/
void
_mesa_upscale_teximage2d (GLsizei inWidth, GLsizei inHeight,
GLsizei outWidth, GLsizei outHeight,
GLint comps, const GLchan *src, GLint srcRowStride,
GLchan *dest )
{
GLint i, j, k;
ASSERT(outWidth >= inWidth);
ASSERT(outHeight >= inHeight);
#if 0
ASSERT(inWidth == 1 || inWidth == 2 || inHeight == 1 || inHeight == 2);
ASSERT((outWidth & 3) == 0);
ASSERT((outHeight & 3) == 0);
#endif
for (i = 0; i < outHeight; i++) {
const GLint ii = i % inHeight;
for (j = 0; j < outWidth; j++) {
const GLint jj = j % inWidth;
for (k = 0; k < comps; k++) {
dest[(i * outWidth + j) * comps + k]
= src[ii * srcRowStride + jj * comps + k];
}
}
}
}
/**
* This is the software fallback for Driver.GetTexImage().
* All error checking will have been done before this routine is called.
*/
void
_mesa_get_teximage(GLcontext *ctx, GLenum target, GLint level,
GLenum format, GLenum type, GLvoid *pixels,
const struct gl_texture_object *texObj,
const struct gl_texture_image *texImage)
{
GLuint dimensions = (target == GL_TEXTURE_3D) ? 3 : 2;
if (ctx->Pack.BufferObj->Name) {
/* pack texture image into a PBO */
GLubyte *buf;
if (!_mesa_validate_pbo_access(dimensions, &ctx->Pack, texImage->Width,
texImage->Height, texImage->Depth,
format, type, pixels)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glGetTexImage(invalid PBO access)");
return;
}
buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
GL_WRITE_ONLY_ARB,
ctx->Pack.BufferObj);
if (!buf) {
/* buffer is already mapped - that's an error */
_mesa_error(ctx, GL_INVALID_OPERATION,"glGetTexImage(PBO is mapped)");
return;
}
pixels = ADD_POINTERS(buf, pixels);
}
else if (!pixels) {
/* not an error */
return;
}
{
const GLint width = texImage->Width;
const GLint height = texImage->Height;
const GLint depth = texImage->Depth;
GLint img, row;
for (img = 0; img < depth; img++) {
for (row = 0; row < height; row++) {
/* compute destination address in client memory */
GLvoid *dest = _mesa_image_address( dimensions, &ctx->Pack, pixels,
width, height, format, type,
img, row, 0);
assert(dest);
if (format == GL_COLOR_INDEX) {
GLuint indexRow[MAX_WIDTH];
GLint col;
/* Can't use FetchTexel here because that returns RGBA */
if (texImage->TexFormat->IndexBits == 8) {
const GLubyte *src = (const GLubyte *) texImage->Data;
for (col = 0; col < width; col++) {
indexRow[col] = src[texImage->Width *
(img * texImage->Height + row) + col];
}
}
else if (texImage->TexFormat->IndexBits == 16) {
const GLushort *src = (const GLushort *) texImage->Data;
for (col = 0; col < width; col++) {
indexRow[col] = src[texImage->Width *
(img * texImage->Height + row) + col];
}
}
else {
_mesa_problem(ctx,
"Color index problem in _mesa_GetTexImage");
}
_mesa_pack_index_span(ctx, width, type, dest,
indexRow, &ctx->Pack,
0 /* no image transfer */);
}
else if (format == GL_DEPTH_COMPONENT) {
GLfloat depthRow[MAX_WIDTH];
GLint col;
for (col = 0; col < width; col++) {
(*texImage->FetchTexelf)(texImage, col, row, img,
depthRow + col);
}
_mesa_pack_depth_span(ctx, width, dest, type,
depthRow, &ctx->Pack);
}
else if (format == GL_YCBCR_MESA) {
/* No pixel transfer */
const GLint rowstride = texImage->RowStride;
MEMCPY(dest,
(const GLushort *) texImage->Data + row * rowstride,
width * sizeof(GLushort));
/* check for byte swapping */
if ((texImage->TexFormat->MesaFormat == MESA_FORMAT_YCBCR
&& type == GL_UNSIGNED_SHORT_8_8_REV_MESA) ||
(texImage->TexFormat->MesaFormat == MESA_FORMAT_YCBCR_REV
&& type == GL_UNSIGNED_SHORT_8_8_MESA)) {
if (!ctx->Pack.SwapBytes)
_mesa_swap2((GLushort *) dest, width);
}
else if (ctx->Pack.SwapBytes) {
_mesa_swap2((GLushort *) dest, width);
}
}
else {
/* general case: convert row to RGBA format */
GLfloat rgba[MAX_WIDTH][4];
GLint col;
for (col = 0; col < width; col++) {
(*texImage->FetchTexelf)(texImage, col, row, img, rgba[col]);
}
_mesa_pack_rgba_span_float(ctx, width,
(const GLfloat (*)[4]) rgba,
format, type, dest, &ctx->Pack,
0 /* no image transfer */);
} /* format */
} /* row */
} /* img */
}
if (ctx->Pack.BufferObj->Name) {
ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
ctx->Pack.BufferObj);
}
}
/**
* This is the software fallback for Driver.GetCompressedTexImage().
* All error checking will have been done before this routine is called.
*/
void
_mesa_get_compressed_teximage(GLcontext *ctx, GLenum target, GLint level,
GLvoid *img,
const struct gl_texture_object *texObj,
const struct gl_texture_image *texImage)
{
if (ctx->Pack.BufferObj->Name) {
/* pack texture image into a PBO */
GLubyte *buf;
if ((const GLubyte *) img + texImage->CompressedSize >
(const GLubyte *) ctx->Pack.BufferObj->Size) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glGetCompressedTexImage(invalid PBO access)");
return;
}
buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
GL_WRITE_ONLY_ARB,
ctx->Pack.BufferObj);
if (!buf) {
/* buffer is already mapped - that's an error */
_mesa_error(ctx, GL_INVALID_OPERATION,
"glGetCompressedTexImage(PBO is mapped)");
return;
}
img = ADD_POINTERS(buf, img);
}
else if (!img) {
/* not an error */
return;
}
/* just memcpy, no pixelstore or pixel transfer */
MEMCPY(img, texImage->Data, texImage->CompressedSize);
if (ctx->Pack.BufferObj->Name) {
ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
ctx->Pack.BufferObj);
}
}
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