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gerrit-public.fairphone.software / fp2-dev / platform / external / mesa3d / fa4525e289b475b928a7b2c4055af9dd7fe46600 / . / src / mesa / main / teximage.c
blob: 14f9c60315c86ecdecc15fb24709f0807440f5c9 [file] [log] [blame]
/* $Id: teximage.c,v 1.40 2000/08/21 14:22:24 brianp Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.5
*
* Copyright (C) 1999-2000 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.
*/
#ifdef PC_HEADER
#include "all.h"
#else
#include "glheader.h"
#include "context.h"
#include "image.h"
#include "mem.h"
#include "mmath.h"
#include "span.h"
#include "state.h"
#include "teximage.h"
#include "texstate.h"
#include "types.h"
#endif
/*
* NOTES:
*
* Mesa's native texture datatype is GLubyte. Native formats are
* GL_ALPHA, GL_LUMINANCE, GL_LUMANCE_ALPHA, GL_INTENSITY, GL_RGB, GL_RGBA,
* and GL_COLOR_INDEX.
* Device drivers are free to implement any internal format they want.
*/
#ifdef DEBUG
static void PrintTexture(const struct gl_texture_image *img)
{
int i, j, c;
GLubyte *data = img->Data;
if (!data) {
printf("No texture data\n");
return;
}
switch (img->Format) {
case GL_ALPHA:
case GL_LUMINANCE:
case GL_INTENSITY:
case GL_COLOR_INDEX:
c = 1;
break;
case GL_LUMINANCE_ALPHA:
c = 2;
break;
case GL_RGB:
c = 3;
break;
case GL_RGBA:
c = 4;
break;
default:
gl_problem(NULL, "error in PrintTexture\n");
return;
}
for (i = 0; i < img->Height; i++) {
for (j = 0; j < img->Width; j++) {
if (c==1)
printf("%02x ", data[0]);
else if (c==2)
printf("%02x%02x ", data[0], data[1]);
else if (c==3)
printf("%02x%02x%02x ", data[0], data[1], data[2]);
else if (c==4)
printf("%02x%02x%02x%02x ", data[0], data[1], data[2], data[3]);
data += c;
}
printf("\n");
}
}
#endif
/*
* Compute log base 2 of n.
* If n isn't an exact power of two return -1.
* If n<0 return -1.
*/
static int
logbase2( int n )
{
GLint i = 1;
GLint log2 = 0;
if (n<0) {
return -1;
}
while ( n > i ) {
i *= 2;
log2++;
}
if (i != n) {
return -1;
}
else {
return log2;
}
}
/*
* Given an internal texture format enum or 1, 2, 3, 4 return the
* corresponding _base_ internal format: GL_ALPHA, GL_LUMINANCE,
* GL_LUMANCE_ALPHA, GL_INTENSITY, GL_RGB, or GL_RGBA.
* Return -1 if invalid enum.
*/
GLint
_mesa_base_tex_format( GLcontext *ctx, GLint format )
{
switch (format) {
case GL_COMPRESSED_ALPHA_ARB:
if (ctx && !ctx->Extensions.HaveTextureCompression)
return -1;
/* fall-through */
case GL_ALPHA:
case GL_ALPHA4:
case GL_ALPHA8:
case GL_ALPHA12:
case GL_ALPHA16:
return GL_ALPHA;
case GL_COMPRESSED_LUMINANCE_ARB:
if (ctx && !ctx->Extensions.HaveTextureCompression)
return -1;
/* fall-through */
case 1:
case GL_LUMINANCE:
case GL_LUMINANCE4:
case GL_LUMINANCE8:
case GL_LUMINANCE12:
case GL_LUMINANCE16:
return GL_LUMINANCE;
case GL_COMPRESSED_LUMINANCE_ALPHA_ARB:
if (ctx && !ctx->Extensions.HaveTextureCompression)
return -1;
/* fall-through */
case 2:
case GL_LUMINANCE_ALPHA:
case GL_LUMINANCE4_ALPHA4:
case GL_LUMINANCE6_ALPHA2:
case GL_LUMINANCE8_ALPHA8:
case GL_LUMINANCE12_ALPHA4:
case GL_LUMINANCE12_ALPHA12:
case GL_LUMINANCE16_ALPHA16:
return GL_LUMINANCE_ALPHA;
case GL_COMPRESSED_INTENSITY_ARB:
if (ctx && !ctx->Extensions.HaveTextureCompression)
return -1;
/* fall-through */
case GL_INTENSITY:
case GL_INTENSITY4:
case GL_INTENSITY8:
case GL_INTENSITY12:
case GL_INTENSITY16:
return GL_INTENSITY;
case GL_COMPRESSED_RGB_ARB:
if (ctx && ctx->Extensions.HaveTextureCompression)
return GL_RGB;
else
return -1;
case GL_COMPRESSED_RGB_FXT1_3DFX:
if (ctx && ctx->Extensions.HaveTextureCompressionFXT1)
return GL_RGB;
else
return -1;
case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
if (ctx && ctx->Extensions.HaveTextureCompressionS3TC)
return GL_RGB;
else
return -1;
case 3:
case GL_RGB:
case GL_R3_G3_B2:
case GL_RGB4:
case GL_RGB5:
case GL_RGB8:
case GL_RGB10:
case GL_RGB12:
case GL_RGB16:
return GL_RGB;
case GL_COMPRESSED_RGBA_ARB:
if (ctx && ctx->Extensions.HaveTextureCompression)
return GL_RGBA;
else
return -1;
case GL_COMPRESSED_RGBA_FXT1_3DFX:
if (ctx && ctx->Extensions.HaveTextureCompressionFXT1)
return GL_RGBA;
else
return -1;
case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
if (ctx && ctx->Extensions.HaveTextureCompressionS3TC)
return GL_RGBA;
else
return -1;
case 4:
case GL_RGBA:
case GL_RGBA2:
case GL_RGBA4:
case GL_RGB5_A1:
case GL_RGBA8:
case GL_RGB10_A2:
case GL_RGBA12:
case GL_RGBA16:
return GL_RGBA;
case GL_COLOR_INDEX:
case GL_COLOR_INDEX1_EXT:
case GL_COLOR_INDEX2_EXT:
case GL_COLOR_INDEX4_EXT:
case GL_COLOR_INDEX8_EXT:
case GL_COLOR_INDEX12_EXT:
case GL_COLOR_INDEX16_EXT:
return GL_COLOR_INDEX;
default:
return -1; /* error */
}
}
/*
* Given an internal texture format enum or 1, 2, 3, 4 return the
* corresponding _base_ internal format: GL_ALPHA, GL_LUMINANCE,
* GL_LUMANCE_ALPHA, GL_INTENSITY, GL_RGB, or GL_RGBA. Return the
* number of components for the format. Return -1 if invalid enum.
*/
static GLint
components_in_intformat( GLint format )
{
switch (format) {
case GL_ALPHA:
case GL_ALPHA4:
case GL_ALPHA8:
case GL_ALPHA12:
case GL_ALPHA16:
return 1;
case 1:
case GL_LUMINANCE:
case GL_LUMINANCE4:
case GL_LUMINANCE8:
case GL_LUMINANCE12:
case GL_LUMINANCE16:
return 1;
case 2:
case GL_LUMINANCE_ALPHA:
case GL_LUMINANCE4_ALPHA4:
case GL_LUMINANCE6_ALPHA2:
case GL_LUMINANCE8_ALPHA8:
case GL_LUMINANCE12_ALPHA4:
case GL_LUMINANCE12_ALPHA12:
case GL_LUMINANCE16_ALPHA16:
return 2;
case GL_INTENSITY:
case GL_INTENSITY4:
case GL_INTENSITY8:
case GL_INTENSITY12:
case GL_INTENSITY16:
return 1;
case 3:
case GL_RGB:
case GL_R3_G3_B2:
case GL_RGB4:
case GL_RGB5:
case GL_RGB8:
case GL_RGB10:
case GL_RGB12:
case GL_RGB16:
return 3;
case 4:
case GL_RGBA:
case GL_RGBA2:
case GL_RGBA4:
case GL_RGB5_A1:
case GL_RGBA8:
case GL_RGB10_A2:
case GL_RGBA12:
case GL_RGBA16:
return 4;
case GL_COLOR_INDEX:
case GL_COLOR_INDEX1_EXT:
case GL_COLOR_INDEX2_EXT:
case GL_COLOR_INDEX4_EXT:
case GL_COLOR_INDEX8_EXT:
case GL_COLOR_INDEX12_EXT:
case GL_COLOR_INDEX16_EXT:
return 1;
default:
return -1; /* error */
}
}
/*
* Return GL_TRUE if internalFormat is a compressed format, return GL_FALSE
* otherwise.
*/
static GLboolean
is_compressed_format(GLenum internalFormat)
{
switch (internalFormat) {
case GL_COMPRESSED_ALPHA_ARB:
case GL_COMPRESSED_LUMINANCE_ARB:
case GL_COMPRESSED_LUMINANCE_ALPHA_ARB:
case GL_COMPRESSED_INTENSITY_ARB:
case GL_COMPRESSED_RGB_ARB:
case GL_COMPRESSED_RGBA_ARB:
case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
case GL_COMPRESSED_RGB_FXT1_3DFX:
case GL_COMPRESSED_RGBA_FXT1_3DFX:
return GL_TRUE;
default:
return GL_FALSE;
}
}
/*
* Examine the texImage->Format field and set the Red, Green, Blue, etc
* texel component sizes to default values.
* These fields are set only here by core Mesa but device drivers may
* overwritting these fields to indicate true texel resolution.
*/
static void
set_teximage_component_sizes( struct gl_texture_image *texImage )
{
switch (texImage->Format) {
case GL_ALPHA:
texImage->RedBits = 0;
texImage->GreenBits = 0;
texImage->BlueBits = 0;
texImage->AlphaBits = 8;
texImage->IntensityBits = 0;
texImage->LuminanceBits = 0;
texImage->IndexBits = 0;
break;
case GL_LUMINANCE:
texImage->RedBits = 0;
texImage->GreenBits = 0;
texImage->BlueBits = 0;
texImage->AlphaBits = 0;
texImage->IntensityBits = 0;
texImage->LuminanceBits = 8;
texImage->IndexBits = 0;
break;
case GL_LUMINANCE_ALPHA:
texImage->RedBits = 0;
texImage->GreenBits = 0;
texImage->BlueBits = 0;
texImage->AlphaBits = 8;
texImage->IntensityBits = 0;
texImage->LuminanceBits = 8;
texImage->IndexBits = 0;
break;
case GL_INTENSITY:
texImage->RedBits = 0;
texImage->GreenBits = 0;
texImage->BlueBits = 0;
texImage->AlphaBits = 0;
texImage->IntensityBits = 8;
texImage->LuminanceBits = 0;
texImage->IndexBits = 0;
break;
case GL_RED:
texImage->RedBits = 8;
texImage->GreenBits = 0;
texImage->BlueBits = 0;
texImage->AlphaBits = 0;
texImage->IntensityBits = 0;
texImage->LuminanceBits = 0;
texImage->IndexBits = 0;
break;
case GL_GREEN:
texImage->RedBits = 0;
texImage->GreenBits = 8;
texImage->BlueBits = 0;
texImage->AlphaBits = 0;
texImage->IntensityBits = 0;
texImage->LuminanceBits = 0;
texImage->IndexBits = 0;
break;
case GL_BLUE:
texImage->RedBits = 0;
texImage->GreenBits = 0;
texImage->BlueBits = 8;
texImage->AlphaBits = 0;
texImage->IntensityBits = 0;
texImage->LuminanceBits = 0;
texImage->IndexBits = 0;
break;
case GL_RGB:
case GL_BGR:
texImage->RedBits = 8;
texImage->GreenBits = 8;
texImage->BlueBits = 8;
texImage->AlphaBits = 0;
texImage->IntensityBits = 0;
texImage->LuminanceBits = 0;
texImage->IndexBits = 0;
break;
case GL_RGBA:
case GL_BGRA:
case GL_ABGR_EXT:
texImage->RedBits = 8;
texImage->GreenBits = 8;
texImage->BlueBits = 8;
texImage->AlphaBits = 8;
texImage->IntensityBits = 0;
texImage->LuminanceBits = 0;
texImage->IndexBits = 0;
break;
case GL_COLOR_INDEX:
texImage->RedBits = 0;
texImage->GreenBits = 0;
texImage->BlueBits = 0;
texImage->AlphaBits = 0;
texImage->IntensityBits = 0;
texImage->LuminanceBits = 0;
texImage->IndexBits = 8;
break;
default:
gl_problem(NULL, "unexpected format in set_teximage_component_sizes");
}
}
static void
set_tex_image(struct gl_texture_object *tObj,
GLenum target, GLint level,
struct gl_texture_image *texImage)
{
ASSERT(tObj);
ASSERT(texImage);
switch (target) {
case GL_TEXTURE_2D:
tObj->Image[level] = texImage;
return;
case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB:
tObj->Image[level] = texImage;
return;
case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB:
tObj->NegX[level] = texImage;
return;
case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB:
tObj->PosY[level] = texImage;
return;
case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB:
tObj->NegY[level] = texImage;
return;
case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB:
tObj->PosZ[level] = texImage;
return;
case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB:
tObj->NegZ[level] = texImage;
return;
default:
gl_problem(NULL, "bad target in set_tex_image()");
return;
}
}
/*
* Return new gl_texture_image struct with all fields initialized to zero.
*/
struct gl_texture_image *
_mesa_alloc_texture_image( void )
{
return CALLOC_STRUCT(gl_texture_image);
}
/*
* Initialize most fields of a gl_texture_image struct.
*/
static void
init_texture_image( struct gl_texture_image *img,
GLsizei width, GLsizei height, GLsizei depth,
GLint border, GLenum internalFormat )
{
ASSERT(img);
ASSERT(!img->Data);
img->Format = (GLenum) _mesa_base_tex_format(NULL, internalFormat);
set_teximage_component_sizes( img );
img->IntFormat = (GLenum) internalFormat;
img->Border = border;
img->Width = width;
img->Height = height;
img->Depth = depth;
img->WidthLog2 = logbase2(width - 2 * border);
if (height == 1) /* 1-D texture */
img->HeightLog2 = 0;
else
img->HeightLog2 = logbase2(height - 2 * border);
if (depth == 1) /* 2-D texture */
img->DepthLog2 = 0;
else
img->DepthLog2 = logbase2(depth - 2 * border);
img->Width2 = 1 << img->WidthLog2;
img->Height2 = 1 << img->HeightLog2;
img->Depth2 = 1 << img->DepthLog2;
img->MaxLog2 = MAX2(img->WidthLog2, img->HeightLog2);
img->IsCompressed = is_compressed_format(internalFormat);
}
void
_mesa_free_texture_image( struct gl_texture_image *teximage )
{
if (teximage->Data) {
FREE( teximage->Data );
teximage->Data = NULL;
}
FREE( teximage );
}
/*
* Return number of bytes of storage needed to store a compressed texture
* image.
*/
GLuint
_mesa_compressed_image_size(GLenum internalFormat,
GLint width, GLint height, GLint depth)
{
return 0;
}
/*
* Given a texture unit and a texture target, return the corresponding
* texture object.
*/
struct gl_texture_object *
_mesa_select_tex_object(GLcontext *ctx, struct gl_texture_unit *texUnit,
GLenum target)
{
switch (target) {
case GL_TEXTURE_1D:
return texUnit->CurrentD[1];
case GL_PROXY_TEXTURE_1D:
return ctx->Texture.Proxy1D;
case GL_TEXTURE_2D:
return texUnit->CurrentD[2];
case GL_PROXY_TEXTURE_2D:
return ctx->Texture.Proxy2D;
case GL_TEXTURE_3D:
return texUnit->CurrentD[3];
case GL_PROXY_TEXTURE_3D:
return ctx->Texture.Proxy3D;
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:
return ctx->Extensions.HaveTextureCubeMap
? texUnit->CurrentCubeMap : NULL;
case GL_PROXY_TEXTURE_CUBE_MAP_ARB:
return ctx->Extensions.HaveTextureCubeMap
? ctx->Texture.ProxyCubeMap : NULL;
default:
gl_problem(NULL, "bad target in _mesa_select_tex_object()");
return NULL;
}
}
/*
* Return the texture image struct which corresponds to target and level
* for the given texture unit.
*/
struct gl_texture_image *
_mesa_select_tex_image(GLcontext *ctx, const struct gl_texture_unit *texUnit,
GLenum target, GLint level)
{
ASSERT(texUnit);
switch (target) {
case GL_TEXTURE_1D:
return texUnit->CurrentD[1]->Image[level];
case GL_PROXY_TEXTURE_1D:
return ctx->Texture.Proxy1D->Image[level];
case GL_TEXTURE_2D:
return texUnit->CurrentD[2]->Image[level];
case GL_PROXY_TEXTURE_2D:
return ctx->Texture.Proxy2D->Image[level];
case GL_TEXTURE_3D:
return texUnit->CurrentD[3]->Image[level];
case GL_PROXY_TEXTURE_3D:
return ctx->Texture.Proxy3D->Image[level];
case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB:
if (ctx->Extensions.HaveTextureCubeMap)
return texUnit->CurrentCubeMap->Image[level];
else
return NULL;
case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB:
if (ctx->Extensions.HaveTextureCubeMap)
return texUnit->CurrentCubeMap->NegX[level];
else
return NULL;
case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB:
if (ctx->Extensions.HaveTextureCubeMap)
return texUnit->CurrentCubeMap->PosY[level];
else
return NULL;
case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB:
if (ctx->Extensions.HaveTextureCubeMap)
return texUnit->CurrentCubeMap->NegY[level];
else
return NULL;
case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB:
if (ctx->Extensions.HaveTextureCubeMap)
return texUnit->CurrentCubeMap->PosZ[level];
else
return NULL;
case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB:
if (ctx->Extensions.HaveTextureCubeMap)
return texUnit->CurrentCubeMap->NegZ[level];
else
return NULL;
case GL_PROXY_TEXTURE_CUBE_MAP_ARB:
if (ctx->Extensions.HaveTextureCubeMap)
return ctx->Texture.ProxyCubeMap->Image[level];
else
return NULL;
default:
gl_problem(ctx, "bad target in _mesa_select_tex_image()");
return NULL;
}
}
/* Need this to prevent an out-of-bounds memory access when using
* X86 optimized code.
*/
#ifdef USE_X86_ASM
# define EXTRA_BYTE 1
#else
# define EXTRA_BYTE 0
#endif
/*
* Called by glTexImage[123]D. Fill in a texture image with data given
* by the client. All pixel transfer and unpack modes are handled here.
* NOTE: All texture image parameters should have already been error checked.
*/
static void
make_texture_image( GLcontext *ctx, GLint dimensions,
struct gl_texture_image *texImage,
GLenum srcFormat, GLenum srcType, const GLvoid *pixels,
const struct gl_pixelstore_attrib *unpacking)
{
GLint components, numPixels;
GLint internalFormat, width, height, depth, border;
ASSERT(ctx);
ASSERT(texImage);
ASSERT(!texImage->Data);
ASSERT(pixels);
ASSERT(unpacking);
internalFormat = texImage->IntFormat;
width = texImage->Width;
height = texImage->Height;
depth = texImage->Depth;
border = texImage->Border;
components = components_in_intformat(internalFormat);
ASSERT(width > 0);
ASSERT(height > 0);
ASSERT(depth > 0);
ASSERT(border == 0 || border == 1);
ASSERT(pixels);
ASSERT(unpacking);
ASSERT(components);
numPixels = width * height * depth;
texImage->Data = (GLubyte *) MALLOC(numPixels * components + EXTRA_BYTE);
if (!texImage->Data)
return; /* out of memory */
/*
* OK, the texture image struct has been initialized and the texture
* image memory has been allocated.
* Now fill in the texture image from the source data.
* This includes applying the pixel transfer operations.
*/
if (ctx->ImageTransferState == UPDATE_IMAGE_TRANSFER_STATE)
_mesa_update_image_transfer_state(ctx);
/* try common 2D texture cases first */
if (!ctx->ImageTransferState && srcType == GL_UNSIGNED_BYTE && depth == 1) {
if (srcFormat == internalFormat ||
(srcFormat == GL_LUMINANCE && internalFormat == 1) ||
(srcFormat == GL_LUMINANCE_ALPHA && internalFormat == 2) ||
(srcFormat == GL_RGB && internalFormat == 3) ||
(srcFormat == GL_RGBA && internalFormat == 4)) {
/* This will cover the common GL_RGB, GL_RGBA, GL_ALPHA,
* GL_LUMINANCE_ALPHA, etc. texture formats.
*/
const GLubyte *src = (const GLubyte *) _mesa_image_address(
unpacking, pixels, width, height, srcFormat, srcType, 0, 0, 0);
const GLint srcStride = _mesa_image_row_stride(unpacking, width,
srcFormat, srcType);
GLubyte *dst = texImage->Data;
GLint dstBytesPerRow = width * components * sizeof(GLubyte);
if (srcStride == dstBytesPerRow) {
MEMCPY(dst, src, height * dstBytesPerRow);
}
else {
GLint i;
for (i = 0; i < height; i++) {
MEMCPY(dst, src, dstBytesPerRow);
src += srcStride;
dst += dstBytesPerRow;
}
}
return; /* all done */
}
else if (srcFormat == GL_RGBA && internalFormat == GL_RGB) {
/* commonly used by Quake */
const GLubyte *src = (const GLubyte *) _mesa_image_address(
unpacking, pixels, width, height, srcFormat, srcType, 0, 0, 0);
const GLint srcStride = _mesa_image_row_stride(unpacking, width,
srcFormat, srcType);
GLubyte *dst = texImage->Data;
GLint i, j;
for (i = 0; i < height; i++) {
const GLubyte *s = src;
for (j = 0; j < width; j++) {
*dst++ = *s++; /*red*/
*dst++ = *s++; /*green*/
*dst++ = *s++; /*blue*/
s++; /*alpha*/
}
src += srcStride;
}
return; /* all done */
}
}
/*
* General case solutions
*/
if (texImage->Format == GL_COLOR_INDEX) {
/* color index texture */
const GLint destBytesPerRow = width * components * sizeof(GLubyte);
const GLenum dstType = GL_UNSIGNED_BYTE;
GLubyte *dest = texImage->Data;
GLint img, row;
for (img = 0; img < depth; img++) {
for (row = 0; row < height; row++) {
const GLvoid *source = _mesa_image_address(unpacking,
pixels, width, height, srcFormat, srcType, img, row, 0);
_mesa_unpack_index_span(ctx, width, dstType, dest,
srcType, source, unpacking,
ctx->ImageTransferState);
dest += destBytesPerRow;
}
}
}
else {
/* regular, color texture */
const GLint destBytesPerRow = width * components * sizeof(GLubyte);
const GLenum dstFormat = texImage->Format;
GLubyte *dest = texImage->Data;
GLint img, row;
/* XXX convolution */
for (img = 0; img < depth; img++) {
for (row = 0; row < height; row++) {
const GLvoid *source = _mesa_image_address(unpacking,
pixels, width, height, srcFormat, srcType, img, row, 0);
_mesa_unpack_ubyte_color_span(ctx, width, dstFormat, dest,
srcFormat, srcType, source,
unpacking, ctx->ImageTransferState);
dest += destBytesPerRow;
}
}
}
}
/*
* glTexImage[123]D can accept a NULL image pointer. In this case we
* create a texture image with unspecified image contents per the OpenGL
* spec. This function creates an empty image for the given texture image.
*/
static void
make_null_texture( struct gl_texture_image *texImage )
{
GLint components;
GLint numPixels;
ASSERT(texImage);
ASSERT(!texImage->Data);
components = components_in_intformat(texImage->IntFormat);
numPixels = texImage->Width * texImage->Height * texImage->Depth;
texImage->Data = (GLubyte *) MALLOC( numPixels * components + EXTRA_BYTE );
/*
* Let's see if anyone finds this. If glTexImage2D() is called with
* a NULL image pointer then load the texture image with something
* interesting instead of leaving it indeterminate.
*/
if (texImage->Data) {
static const char message[8][32] = {
" X X XXXXX XXX X ",
" XX XX X X X X X ",
" X X X X X X X ",
" X X XXXX XXX XXXXX ",
" X X X X X X ",
" X X X X X X X ",
" X X XXXXX XXX X X ",
" "
};
GLubyte *imgPtr = texImage->Data;
GLint i, j, k;
for (i = 0; i < texImage->Height; i++) {
GLint srcRow = 7 - i % 8;
for (j = 0; j < texImage->Width; j++) {
GLint srcCol = j % 32;
GLint texel = (message[srcRow][srcCol]=='X') ? 255 : 70;
for (k=0;k<components;k++) {
*imgPtr++ = (GLubyte) texel;
}
}
}
}
}
/*
* Test glTexImage[123]D() parameters for errors.
* Input:
* dimensions - must be 1 or 2 or 3
* Return: GL_TRUE = an error was detected, GL_FALSE = no errors
*/
static GLboolean
texture_error_check( GLcontext *ctx, GLenum target,
GLint level, GLint internalFormat,
GLenum format, GLenum type,
GLuint dimensions,
GLint width, GLint height,
GLint depth, GLint border )
{
GLboolean isProxy;
GLint iformat;
if (dimensions == 1) {
isProxy = (GLboolean) (target == GL_PROXY_TEXTURE_1D);
if (target != GL_TEXTURE_1D && !isProxy) {
gl_error( ctx, GL_INVALID_ENUM, "glTexImage1D(target)" );
return GL_TRUE;
}
}
else if (dimensions == 2) {
isProxy = (GLboolean) (target == GL_PROXY_TEXTURE_2D);
if (target != GL_TEXTURE_2D && !isProxy &&
!(ctx->Extensions.HaveTextureCubeMap &&
target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB &&
target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB)) {
gl_error( ctx, GL_INVALID_ENUM, "glTexImage2D(target)" );
return GL_TRUE;
}
}
else if (dimensions == 3) {
isProxy = (GLboolean) (target == GL_PROXY_TEXTURE_3D);
if (target != GL_TEXTURE_3D && !isProxy) {
gl_error( ctx, GL_INVALID_ENUM, "glTexImage3D(target)" );
return GL_TRUE;
}
}
else {
gl_problem( ctx, "bad dims in texture_error_check" );
return GL_TRUE;
}
/* Border */
if (border != 0 && border != 1) {
if (!isProxy) {
char message[100];
sprintf(message, "glTexImage%dD(border)", dimensions);
gl_error(ctx, GL_INVALID_VALUE, message);
}
return GL_TRUE;
}
/* Width */
if (width < 2 * border || width > 2 + ctx->Const.MaxTextureSize
|| logbase2( width - 2 * border ) < 0) {
if (!isProxy) {
char message[100];
sprintf(message, "glTexImage%dD(width)", dimensions);
gl_error(ctx, GL_INVALID_VALUE, message);
}
return GL_TRUE;
}
/* Height */
if (dimensions >= 2) {
if (height < 2 * border || height > 2 + ctx->Const.MaxTextureSize
|| logbase2( height - 2 * border ) < 0) {
if (!isProxy) {
char message[100];
sprintf(message, "glTexImage%dD(height)", dimensions);
gl_error(ctx, GL_INVALID_VALUE, message);
}
return GL_TRUE;
}
}
/* For cube map, width must equal height */
if (target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB &&
target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB) {
if (width != height) {
if (!isProxy) {
gl_error(ctx, GL_INVALID_VALUE, "glTexImage2D(width != height)");
}
return GL_TRUE;
}
}
/* Depth */
if (dimensions >= 3) {
if (depth < 2 * border || depth > 2 + ctx->Const.MaxTextureSize
|| logbase2( depth - 2 * border ) < 0) {
if (!isProxy) {
gl_error( ctx, GL_INVALID_VALUE, "glTexImage3D(depth)" );
}
return GL_TRUE;
}
}
/* Level */
if (level < 0 || level >= ctx->Const.MaxTextureLevels) {
if (!isProxy) {
char message[100];
sprintf(message, "glTexImage%dD(level)", dimensions);
gl_error(ctx, GL_INVALID_VALUE, message);
}
return GL_TRUE;
}
iformat = _mesa_base_tex_format( ctx, internalFormat );
if (iformat < 0) {
if (!isProxy) {
char message[100];
sprintf(message, "glTexImage%dD(internalFormat)", dimensions);
gl_error(ctx, GL_INVALID_VALUE, message);
}
return GL_TRUE;
}
if (!is_compressed_format(internalFormat)) {
if (!_mesa_is_legal_format_and_type( format, type )) {
/* Yes, generate GL_INVALID_OPERATION, not GL_INVALID_ENUM, if there
* is a type/format mismatch. See 1.2 spec page 94, sec 3.6.4.
*/
if (!isProxy) {
char message[100];
sprintf(message, "glTexImage%dD(format or type)", dimensions);
gl_error(ctx, GL_INVALID_OPERATION, message);
}
return GL_TRUE;
}
}
/* if we get here, the parameters are OK */
return GL_FALSE;
}
/*
* Test glTexSubImage[123]D() parameters for errors.
* Input:
* dimensions - must be 1 or 2 or 3
* Return: GL_TRUE = an error was detected, GL_FALSE = no errors
*/
static GLboolean
subtexture_error_check( GLcontext *ctx, GLuint dimensions,
GLenum target, GLint level,
GLint xoffset, GLint yoffset, GLint zoffset,
GLint width, GLint height, GLint depth,
GLenum format, GLenum type )
{
struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
struct gl_texture_image *destTex;
if (dimensions == 1) {
if (target != GL_TEXTURE_1D) {
gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage1D(target)" );
return GL_TRUE;
}
}
else if (dimensions == 2) {
if (ctx->Extensions.HaveTextureCubeMap) {
if ((target < GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB ||
target > GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB) &&
target != GL_TEXTURE_2D) {
gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage2D(target)" );
return GL_TRUE;
}
}
else if (target != GL_TEXTURE_2D) {
gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage2D(target)" );
return GL_TRUE;
}
}
else if (dimensions == 3) {
if (target != GL_TEXTURE_3D) {
gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage3D(target)" );
return GL_TRUE;
}
}
else {
gl_problem( ctx, "bad dims in texture_error_check" );
return GL_TRUE;
}
if (level < 0 || level >= ctx->Const.MaxTextureLevels) {
gl_error(ctx, GL_INVALID_ENUM, "glTexSubImage2D(level)");
return GL_TRUE;
}
if (width < 0) {
char message[100];
sprintf(message, "glTexSubImage%dD(width)", dimensions);
gl_error(ctx, GL_INVALID_VALUE, message);
return GL_TRUE;
}
if (height < 0 && dimensions > 1) {
char message[100];
sprintf(message, "glTexSubImage%dD(height)", dimensions);
gl_error(ctx, GL_INVALID_VALUE, message);
return GL_TRUE;
}
if (depth < 0 && dimensions > 2) {
char message[100];
sprintf(message, "glTexSubImage%dD(depth)", dimensions);
gl_error(ctx, GL_INVALID_VALUE, message);
return GL_TRUE;
}
destTex = texUnit->CurrentD[2]->Image[level];
if (!destTex) {
gl_error(ctx, GL_INVALID_OPERATION, "glTexSubImage2D");
return GL_TRUE;
}
if (xoffset < -((GLint)destTex->Border)) {
gl_error(ctx, GL_INVALID_VALUE, "glTexSubImage1/2/3D(xoffset)");
return GL_TRUE;
}
if (xoffset + width > (GLint) (destTex->Width + destTex->Border)) {
gl_error(ctx, GL_INVALID_VALUE, "glTexSubImage1/2/3D(xoffset+width)");
return GL_TRUE;
}
if (dimensions > 1) {
if (yoffset < -((GLint)destTex->Border)) {
gl_error(ctx, GL_INVALID_VALUE, "glTexSubImage2/3D(yoffset)");
return GL_TRUE;
}
if (yoffset + height > (GLint) (destTex->Height + destTex->Border)) {
gl_error(ctx, GL_INVALID_VALUE, "glTexSubImage2/3D(yoffset+height)");
return GL_TRUE;
}
}
if (dimensions > 2) {
if (zoffset < -((GLint)destTex->Border)) {
gl_error(ctx, GL_INVALID_VALUE, "glTexSubImage3D(zoffset)");
return GL_TRUE;
}
if (zoffset + depth > (GLint) (destTex->Depth+destTex->Border)) {
gl_error(ctx, GL_INVALID_VALUE, "glTexSubImage3D(zoffset+depth)");
return GL_TRUE;
}
}
if (!is_compressed_format(destTex->IntFormat)) {
if (!_mesa_is_legal_format_and_type(format, type)) {
char message[100];
sprintf(message, "glTexSubImage%dD(format or type)", dimensions);
gl_error(ctx, GL_INVALID_ENUM, message);
return GL_TRUE;
}
}
return GL_FALSE;
}
/*
* Test glCopyTexImage[12]D() parameters for errors.
* Input: dimensions - must be 1 or 2 or 3
* Return: GL_TRUE = an error was detected, GL_FALSE = no errors
*/
static GLboolean
copytexture_error_check( GLcontext *ctx, GLuint dimensions,
GLenum target, GLint level, GLint internalFormat,
GLint width, GLint height, GLint border )
{
GLint iformat;
if (dimensions == 1) {
if (target != GL_TEXTURE_1D) {
gl_error( ctx, GL_INVALID_ENUM, "glCopyTexImage1D(target)" );
return GL_TRUE;
}
}
else if (dimensions == 2) {
if (ctx->Extensions.HaveTextureCubeMap) {
if ((target < GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB ||
target > GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB) &&
target != GL_TEXTURE_2D) {
gl_error( ctx, GL_INVALID_ENUM, "glCopyTexImage2D(target)" );
return GL_TRUE;
}
}
else if (target != GL_TEXTURE_2D) {
gl_error( ctx, GL_INVALID_ENUM, "glCopyTexImage2D(target)" );
return GL_TRUE;
}
}
/* Border */
if (border!=0 && border!=1) {
char message[100];
sprintf(message, "glCopyTexImage%dD(border)", dimensions);
gl_error(ctx, GL_INVALID_VALUE, message);
return GL_TRUE;
}
/* Width */
if (width < 2 * border || width > 2 + ctx->Const.MaxTextureSize
|| logbase2( width - 2 * border ) < 0) {
char message[100];
sprintf(message, "glCopyTexImage%dD(width)", dimensions);
gl_error(ctx, GL_INVALID_VALUE, message);
return GL_TRUE;
}
/* Height */
if (dimensions >= 2) {
if (height < 2 * border || height > 2 + ctx->Const.MaxTextureSize
|| logbase2( height - 2 * border ) < 0) {
char message[100];
sprintf(message, "glCopyTexImage%dD(height)", dimensions);
gl_error(ctx, GL_INVALID_VALUE, message);
return GL_TRUE;
}
}
/* For cube map, width must equal height */
if (target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB &&
target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB) {
if (width != height) {
gl_error(ctx, GL_INVALID_VALUE, "glCopyTexImage2D(width != height)");
return GL_TRUE;
}
}
/* Level */
if (level<0 || level>=ctx->Const.MaxTextureLevels) {
char message[100];
sprintf(message, "glCopyTexImage%dD(level)", dimensions);
gl_error(ctx, GL_INVALID_VALUE, message);
return GL_TRUE;
}
iformat = _mesa_base_tex_format( ctx, internalFormat );
if (iformat < 0) {
char message[100];
sprintf(message, "glCopyTexImage%dD(internalFormat)", dimensions);
gl_error(ctx, GL_INVALID_VALUE, message);
return GL_TRUE;
}
/* if we get here, the parameters are OK */
return GL_FALSE;
}
static GLboolean
copytexsubimage_error_check( GLcontext *ctx, GLuint dimensions,
GLenum target, GLint level,
GLint xoffset, GLint yoffset, GLint zoffset,
GLsizei width, GLsizei height )
{
struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
struct gl_texture_image *teximage;
if (dimensions == 1) {
if (target != GL_TEXTURE_1D) {
gl_error( ctx, GL_INVALID_ENUM, "glCopyTexSubImage1D(target)" );
return GL_TRUE;
}
}
else if (dimensions == 2) {
if (ctx->Extensions.HaveTextureCubeMap) {
if ((target < GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB ||
target > GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB) &&
target != GL_TEXTURE_2D) {
gl_error( ctx, GL_INVALID_ENUM, "glCopyTexSubImage2D(target)" );
return GL_TRUE;
}
}
else if (target != GL_TEXTURE_2D) {
gl_error( ctx, GL_INVALID_ENUM, "glCopyTexSubImage2D(target)" );
return GL_TRUE;
}
}
else if (dimensions == 3) {
if (target != GL_TEXTURE_3D) {
gl_error( ctx, GL_INVALID_ENUM, "glCopyTexSubImage3D(target)" );
return GL_TRUE;
}
}
if (level < 0 || level >= ctx->Const.MaxTextureLevels) {
char message[100];
sprintf(message, "glCopyTexSubImage%dD(level)", dimensions);
gl_error(ctx, GL_INVALID_VALUE, message);
return GL_TRUE;
}
if (width < 0) {
char message[100];
sprintf(message, "glCopyTexSubImage%dD(width)", dimensions );
gl_error(ctx, GL_INVALID_VALUE, message);
return GL_TRUE;
}
if (dimensions > 1 && height < 0) {
char message[100];
sprintf(message, "glCopyTexSubImage%dD(height)", dimensions );
gl_error(ctx, GL_INVALID_VALUE, message);
return GL_TRUE;
}
teximage = texUnit->CurrentD[dimensions]->Image[level];
if (!teximage) {
char message[100];
sprintf(message, "glCopyTexSubImage%dD(undefined texture)", dimensions);
gl_error(ctx, GL_INVALID_OPERATION, message);
return GL_TRUE;
}
if (xoffset < -((GLint)teximage->Border)) {
char message[100];
sprintf(message, "glCopyTexSubImage%dD(xoffset)", dimensions);
gl_error(ctx, GL_INVALID_VALUE, message);
return GL_TRUE;
}
if (xoffset+width > (GLint) (teximage->Width+teximage->Border)) {
char message[100];
sprintf(message, "glCopyTexSubImage%dD(xoffset+width)", dimensions);
gl_error(ctx, GL_INVALID_VALUE, message);
return GL_TRUE;
}
if (dimensions > 1) {
if (yoffset < -((GLint)teximage->Border)) {
char message[100];
sprintf(message, "glCopyTexSubImage%dD(yoffset)", dimensions);
gl_error(ctx, GL_INVALID_VALUE, message);
return GL_TRUE;
}
/* NOTE: we're adding the border here, not subtracting! */
if (yoffset+height > (GLint) (teximage->Height+teximage->Border)) {
char message[100];
sprintf(message, "glCopyTexSubImage%dD(yoffset+height)", dimensions);
gl_error(ctx, GL_INVALID_VALUE, message);
return GL_TRUE;
}
}
if (dimensions > 2) {
if (zoffset < -((GLint)teximage->Border)) {
char message[100];
sprintf(message, "glCopyTexSubImage%dD(zoffset)", dimensions);
gl_error(ctx, GL_INVALID_VALUE, message);
return GL_TRUE;
}
if (zoffset > (GLint) (teximage->Depth+teximage->Border)) {
char message[100];
sprintf(message, "glCopyTexSubImage%dD(zoffset+depth)", dimensions);
gl_error(ctx, GL_INVALID_VALUE, message);
return GL_TRUE;
}
}
/* if we get here, the parameters are OK */
return GL_FALSE;
}
/*
* Called from the API. Note that width includes the border.
*/
void
_mesa_TexImage1D( GLenum target, GLint level, GLint internalFormat,
GLsizei width, GLint border, GLenum format,
GLenum type, const GLvoid *pixels )
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glTexImage1D");
if (target==GL_TEXTURE_1D) {
struct gl_texture_unit *texUnit;
struct gl_texture_object *texObj;
struct gl_texture_image *texImage;
if (texture_error_check(ctx, target, level, internalFormat,
format, type, 1, width, 1, 1, border)) {
return; /* error in texture image was detected */
}
texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
texObj = texUnit->CurrentD[1];
texImage = texObj->Image[level];
if (!texImage) {
texImage = _mesa_alloc_texture_image();
texObj->Image[level] = texImage;
if (!texImage) {
gl_error(ctx, GL_OUT_OF_MEMORY, "glTexImage1D");
return;
}
}
else if (texImage->Data) {
FREE(texImage->Data);
texImage->Data = NULL;
}
/* setup the teximage struct's fields */
init_texture_image(texImage, width, 1, 1, border, internalFormat);
if (ctx->ImageTransferState == UPDATE_IMAGE_TRANSFER_STATE)
_mesa_update_image_transfer_state(ctx);
/* process the texture image */
if (pixels) {
GLboolean retain = GL_TRUE;
GLboolean success = GL_FALSE;
if (!ctx->ImageTransferState && ctx->Driver.TexImage1D) {
/* let device driver try to use raw image */
success = (*ctx->Driver.TexImage1D)( ctx, target, level, format,
type, pixels, &ctx->Unpack,
texObj, texImage, &retain);
}
if (retain || !success) {
/* make internal copy of the texture image */
make_texture_image(ctx, 1, texImage, format, type,
pixels, &ctx->Unpack);
if (!success && ctx->Driver.TexImage1D) {
/* let device driver try to use unpacked image */
(*ctx->Driver.TexImage1D)( ctx, target, level, texImage->Format,
GL_UNSIGNED_BYTE, texImage->Data,
&_mesa_native_packing,
texObj, texImage, &retain);
}
}
if (!retain && texImage->Data) {
FREE(texImage->Data);
texImage->Data = NULL;
}
}
else {
make_null_texture(texImage);
if (ctx->Driver.TexImage1D) {
GLboolean retain;
(*ctx->Driver.TexImage1D)( ctx, target, level, texImage->Format,
GL_UNSIGNED_BYTE, texImage->Data,
&_mesa_native_packing,
texObj, texImage, &retain);
}
}
/* state update */
gl_put_texobj_on_dirty_list( ctx, texObj );
ctx->NewState |= NEW_TEXTURING;
}
else if (target==GL_PROXY_TEXTURE_1D) {
/* Proxy texture: check for errors and update proxy state */
if (texture_error_check(ctx, target, level, internalFormat,
format, type, 1, width, 1, 1, border)) {
/* if error, clear all proxy texture image parameters */
if (level>=0 && level<ctx->Const.MaxTextureLevels) {
MEMSET( ctx->Texture.Proxy1D->Image[level], 0,
sizeof(struct gl_texture_image) );
}
}
else {
/* if no error, update proxy texture image parameters */
init_texture_image(ctx->Texture.Proxy1D->Image[level],
width, 1, 1, border, internalFormat);
}
}
else {
gl_error( ctx, GL_INVALID_ENUM, "glTexImage1D(target)" );
return;
}
}
void
_mesa_TexImage2D( GLenum target, GLint level, GLint internalFormat,
GLsizei width, GLsizei height, GLint border,
GLenum format, GLenum type,
const GLvoid *pixels )
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glTexImage2D");
if (target==GL_TEXTURE_2D ||
(ctx->Extensions.HaveTextureCubeMap &&
target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB &&
target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB)) {
struct gl_texture_unit *texUnit;
struct gl_texture_object *texObj;
struct gl_texture_image *texImage;
if (texture_error_check(ctx, target, level, internalFormat,
format, type, 2, width, height, 1, border)) {
return; /* error in texture image was detected */
}
texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
texObj = _mesa_select_tex_object(ctx, texUnit, target);
texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
if (!texImage) {
texImage = _mesa_alloc_texture_image();
set_tex_image(texObj, target, level, texImage);
/*texObj->Image[level] = texImage;*/
if (!texImage) {
gl_error(ctx, GL_OUT_OF_MEMORY, "glTexImage2D");
return;
}
}
else if (texImage->Data) {
FREE(texImage->Data);
texImage->Data = NULL;
}
/* setup the teximage struct's fields */
init_texture_image(texImage, width, height, 1, border, internalFormat);
if (ctx->ImageTransferState == UPDATE_IMAGE_TRANSFER_STATE)
_mesa_update_image_transfer_state(ctx);
/* process the texture image */
if (pixels) {
GLboolean retain = GL_TRUE;
GLboolean success = GL_FALSE;
if (!ctx->ImageTransferState && ctx->Driver.TexImage2D) {
/* let device driver try to use raw image */
success = (*ctx->Driver.TexImage2D)( ctx, target, level, format,
type, pixels, &ctx->Unpack,
texObj, texImage, &retain);
}
if (retain || !success) {
/* make internal copy of the texture image */
make_texture_image(ctx, 2, texImage, format, type,
pixels, &ctx->Unpack);
if (!success && ctx->Driver.TexImage2D) {
/* let device driver try to use unpacked image */
(*ctx->Driver.TexImage2D)( ctx, target, level, texImage->Format,
GL_UNSIGNED_BYTE, texImage->Data,
&_mesa_native_packing,
texObj, texImage, &retain);
}
}
if (!retain && texImage->Data) {
FREE(texImage->Data);
texImage->Data = NULL;
}
}
else {
make_null_texture(texImage);
if (ctx->Driver.TexImage2D) {
GLboolean retain;
(*ctx->Driver.TexImage2D)( ctx, target, level, texImage->Format,
GL_UNSIGNED_BYTE, texImage->Data,
&_mesa_native_packing,
texObj, texImage, &retain);
}
}
#define OLD_DD_TEXTURE
#ifdef OLD_DD_TEXTURE
/* XXX this will be removed in the future */
if (ctx->Driver.TexImage) {
(*ctx->Driver.TexImage)( ctx, target, texObj, level, internalFormat,
texImage );
}
#endif
/* state update */
gl_put_texobj_on_dirty_list( ctx, texObj );
ctx->NewState |= NEW_TEXTURING;
}
else if (target==GL_PROXY_TEXTURE_2D) {
/* Proxy texture: check for errors and update proxy state */
if (texture_error_check(ctx, target, level, internalFormat,
format, type, 2, width, height, 1, border)) {
/* if error, clear all proxy texture image parameters */
if (level>=0 && level<ctx->Const.MaxTextureLevels) {
MEMSET( ctx->Texture.Proxy2D->Image[level], 0,
sizeof(struct gl_texture_image) );
}
}
else {
/* if no error, update proxy texture image parameters */
init_texture_image(ctx->Texture.Proxy2D->Image[level],
width, height, 1, border, internalFormat);
}
}
else {
gl_error( ctx, GL_INVALID_ENUM, "glTexImage2D(target)" );
return;
}
}
/*
* Called by the API or display list executor.
* Note that width and height include the border.
*/
void
_mesa_TexImage3D( GLenum target, GLint level, GLint internalFormat,
GLsizei width, GLsizei height, GLsizei depth,
GLint border, GLenum format, GLenum type,
const GLvoid *pixels )
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glTexImage3D");
if (target==GL_TEXTURE_3D_EXT) {
struct gl_texture_unit *texUnit;
struct gl_texture_object *texObj;
struct gl_texture_image *texImage;
if (texture_error_check(ctx, target, level, internalFormat,
format, type, 3, width, height, depth, border)) {
return; /* error in texture image was detected */
}
texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
texObj = texUnit->CurrentD[3];
texImage = texObj->Image[level];
if (!texImage) {
texImage = _mesa_alloc_texture_image();
texObj->Image[level] = texImage;
if (!texImage) {
gl_error(ctx, GL_OUT_OF_MEMORY, "glTexImage3D");
return;
}
}
else if (texImage->Data) {
FREE(texImage->Data);
texImage->Data = NULL;
}
/* setup the teximage struct's fields */
init_texture_image(texImage, width, height, depth,
border, internalFormat);
if (ctx->ImageTransferState == UPDATE_IMAGE_TRANSFER_STATE)
_mesa_update_image_transfer_state(ctx);
/* process the texture image */
if (pixels) {
GLboolean retain = GL_TRUE;
GLboolean success = GL_FALSE;
if (!ctx->ImageTransferState && ctx->Driver.TexImage3D) {
/* let device driver try to use raw image */
success = (*ctx->Driver.TexImage3D)( ctx, target, level, format,
type, pixels, &ctx->Unpack,
texObj, texImage, &retain);
}
if (retain || !success) {
/* make internal copy of the texture image */
make_texture_image(ctx, 3, texImage, format, type,
pixels, &ctx->Unpack);
if (!success && ctx->Driver.TexImage3D) {
/* let device driver try to use unpacked image */
(*ctx->Driver.TexImage3D)( ctx, target, level, texImage->Format,
GL_UNSIGNED_BYTE, texImage->Data,
&_mesa_native_packing,
texObj, texImage, &retain);
}
}
if (!retain && texImage->Data) {
FREE(texImage->Data);
texImage->Data = NULL;
}
}
else {
make_null_texture(texImage);
if (ctx->Driver.TexImage3D) {
GLboolean retain;
(*ctx->Driver.TexImage3D)( ctx, target, level, texImage->Format,
GL_UNSIGNED_BYTE, texImage->Data,
&_mesa_native_packing,
texObj, texImage, &retain);
}
}
/* state update */
gl_put_texobj_on_dirty_list( ctx, texObj );
ctx->NewState |= NEW_TEXTURING;
}
else if (target==GL_PROXY_TEXTURE_3D) {
/* Proxy texture: check for errors and update proxy state */
if (texture_error_check(ctx, target, level, internalFormat,
format, type, 3, width, height, depth, border)) {
/* if error, clear all proxy texture image parameters */
if (level>=0 && level<ctx->Const.MaxTextureLevels) {
MEMSET( ctx->Texture.Proxy3D->Image[level], 0,
sizeof(struct gl_texture_image) );
}
}
else {
/* if no error, update proxy texture image parameters */
init_texture_image(ctx->Texture.Proxy3D->Image[level],
width, height, depth, border, internalFormat);
}
}
else {
gl_error( ctx, GL_INVALID_ENUM, "glTexImage3D(target)" );
return;
}
}
void
_mesa_TexImage3DEXT( GLenum target, GLint level, GLenum internalFormat,
GLsizei width, GLsizei height, GLsizei depth,
GLint border, GLenum format, GLenum type,
const GLvoid *pixels )
{
_mesa_TexImage3D(target, level, (GLint) internalFormat, width, height,
depth, border, format, type, pixels);
}
/*
* Fetch a texture image from the device driver.
* Store the results in the given texture object at the given mipmap level.
*/
void
_mesa_get_teximage_from_driver( GLcontext *ctx, GLenum target, GLint level,
const struct gl_texture_object *texObj )
{
GLvoid *image;
GLenum imgFormat, imgType;
GLboolean freeImage;
struct gl_texture_image *texImage;
GLint destComponents, numPixels, srcBytesPerTexel;
if (!ctx->Driver.GetTexImage)
return;
image = (*ctx->Driver.GetTexImage)( ctx, target, level, texObj,
&imgFormat, &imgType, &freeImage);
if (!image)
return;
texImage = texObj->Image[level];
ASSERT(texImage);
if (!texImage)
return;
destComponents = components_in_intformat(texImage->Format);
assert(destComponents > 0);
numPixels = texImage->Width * texImage->Height * texImage->Depth;
assert(numPixels > 0);
srcBytesPerTexel = _mesa_bytes_per_pixel(imgFormat, imgType);
assert(srcBytesPerTexel > 0);
if (!texImage->Data) {
/* Allocate memory for the texture image data */
texImage->Data = (GLubyte *) MALLOC(numPixels * destComponents + EXTRA_BYTE);
}
if (imgFormat == texImage->Format && imgType == GL_UNSIGNED_BYTE) {
/* We got lucky! The driver's format and type match Mesa's format. */
if (texImage->Data) {
MEMCPY(texImage->Data, image, numPixels * destComponents);
}
}
else {
/* Convert the texture image from the driver's format to Mesa's
* internal format.
*/
const GLint width = texImage->Width;
const GLint height = texImage->Height;
const GLint depth = texImage->Depth;
const GLint destBytesPerRow = width * destComponents * sizeof(GLchan);
const GLint srcBytesPerRow = width * srcBytesPerTexel;
const GLenum dstType = GL_UNSIGNED_BYTE;
const GLenum dstFormat = texImage->Format;
const GLubyte *srcPtr = (const GLubyte *) image;
GLubyte *destPtr = texImage->Data;
if (texImage->Format == GL_COLOR_INDEX) {
/* color index texture */
GLint img, row;
assert(imgFormat == GL_COLOR_INDEX);
for (img = 0; img < depth; img++) {
for (row = 0; row < height; row++) {
_mesa_unpack_index_span(ctx, width, dstType, destPtr,
imgType, srcPtr, &_mesa_native_packing, 0);
destPtr += destBytesPerRow;
srcPtr += srcBytesPerRow;
}
}
}
else {
/* color texture */
GLint img, row;
for (img = 0; img < depth; img++) {
for (row = 0; row < height; row++) {
_mesa_unpack_ubyte_color_span(ctx, width, dstFormat, destPtr,
imgFormat, imgType, srcPtr, &_mesa_native_packing, 0);
destPtr += destBytesPerRow;
srcPtr += srcBytesPerRow;
}
}
}
}
if (freeImage)
FREE(image);
}
void
_mesa_GetTexImage( GLenum target, GLint level, GLenum format,
GLenum type, GLvoid *pixels )
{
GET_CURRENT_CONTEXT(ctx);
const struct gl_texture_object *texObj;
struct gl_texture_image *texImage;
GLboolean discardImage;
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glGetTexImage");
if (level < 0 || level >= ctx->Const.MaxTextureLevels) {
gl_error( ctx, GL_INVALID_VALUE, "glGetTexImage(level)" );
return;
}
if (_mesa_sizeof_type(type) <= 0) {
gl_error( ctx, GL_INVALID_ENUM, "glGetTexImage(type)" );
return;
}
if (_mesa_components_in_format(format) <= 0) {
gl_error( ctx, GL_INVALID_ENUM, "glGetTexImage(format)" );
return;
}
if (!pixels)
return;
switch (target) {
case GL_TEXTURE_1D:
texObj = ctx->Texture.Unit[ctx->Texture.CurrentUnit].CurrentD[1];
texImage = texObj->Image[level];
break;
case GL_TEXTURE_2D:
texObj = ctx->Texture.Unit[ctx->Texture.CurrentUnit].CurrentD[2];
texImage = texObj->Image[level];
break;
case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB:
texObj = ctx->Texture.Unit[ctx->Texture.CurrentUnit].CurrentCubeMap;
texImage = texObj->Image[level];
break;
case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB:
texObj = ctx->Texture.Unit[ctx->Texture.CurrentUnit].CurrentCubeMap;
texImage = texObj->NegX[level];
break;
case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB:
texObj = ctx->Texture.Unit[ctx->Texture.CurrentUnit].CurrentCubeMap;
texImage = texObj->PosY[level];
break;
case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB:
texObj = ctx->Texture.Unit[ctx->Texture.CurrentUnit].CurrentCubeMap;
texImage = texObj->NegY[level];
break;
case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB:
texObj = ctx->Texture.Unit[ctx->Texture.CurrentUnit].CurrentCubeMap;
texImage = texObj->PosZ[level];
break;
case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB:
texObj = ctx->Texture.Unit[ctx->Texture.CurrentUnit].CurrentCubeMap;
texImage = texObj->NegZ[level];
break;
case GL_TEXTURE_3D:
texObj = ctx->Texture.Unit[ctx->Texture.CurrentUnit].CurrentD[3];
texImage = texObj->Image[level];
break;
default:
gl_error( ctx, GL_INVALID_ENUM, "glGetTexImage(target)" );
return;
}
if (!texImage) {
/* invalid mipmap level */
return;
}
if (!texImage->Data) {
/* try to get the texture image from the device driver */
_mesa_get_teximage_from_driver(ctx, target, level, texObj);
discardImage = GL_TRUE;
}
else {
discardImage = GL_FALSE;
}
if (texImage->Data) {
GLint width = texImage->Width;
GLint height = texImage->Height;
GLint row;
if (ctx->ImageTransferState == UPDATE_IMAGE_TRANSFER_STATE)
_mesa_update_image_transfer_state(ctx);
for (row = 0; row < height; row++) {
/* compute destination address in client memory */
GLvoid *dest = _mesa_image_address( &ctx->Unpack, pixels,
width, height,
format, type, 0, row, 0);
assert(dest);
if (texImage->Format == GL_RGBA) {
const GLubyte *src = texImage->Data + row * width * 4 * sizeof(GLubyte);
_mesa_pack_rgba_span( ctx, width, (CONST GLubyte (*)[4]) src,
format, type, dest, &ctx->Pack,
ctx->ImageTransferState );
}
else {
/* fetch RGBA row from texture image then pack it in client mem */
GLubyte rgba[MAX_WIDTH][4];
GLint i;
const GLubyte *src;
switch (texImage->Format) {
case GL_ALPHA:
src = texImage->Data + row * width * sizeof(GLubyte);
for (i = 0; i < width; i++) {
rgba[i][RCOMP] = 255;
rgba[i][GCOMP] = 255;
rgba[i][BCOMP] = 255;
rgba[i][ACOMP] = src[i];
}
break;
case GL_LUMINANCE:
src = texImage->Data + row * width * sizeof(GLubyte);
for (i = 0; i < width; i++) {
rgba[i][RCOMP] = src[i];
rgba[i][GCOMP] = src[i];
rgba[i][BCOMP] = src[i];
rgba[i][ACOMP] = 255;
}
break;
case GL_LUMINANCE_ALPHA:
src = texImage->Data + row * 2 * width * sizeof(GLubyte);
for (i = 0; i < width; i++) {
rgba[i][RCOMP] = src[i*2+0];
rgba[i][GCOMP] = src[i*2+0];
rgba[i][BCOMP] = src[i*2+0];
rgba[i][ACOMP] = src[i*2+1];
}
break;
case GL_INTENSITY:
src = texImage->Data + row * width * sizeof(GLubyte);
for (i = 0; i < width; i++) {
rgba[i][RCOMP] = src[i];
rgba[i][GCOMP] = src[i];
rgba[i][BCOMP] = src[i];
rgba[i][ACOMP] = 255;
}
break;
case GL_RGB:
src = texImage->Data + row * 3 * width * sizeof(GLubyte);
for (i = 0; i < width; i++) {
rgba[i][RCOMP] = src[i*3+0];
rgba[i][GCOMP] = src[i*3+1];
rgba[i][BCOMP] = src[i*3+2];
rgba[i][ACOMP] = 255;
}
break;
case GL_RGBA:
/* this special case should have been handled above! */
gl_problem( ctx, "error 1 in gl_GetTexImage" );
break;
case GL_COLOR_INDEX:
gl_problem( ctx, "GL_COLOR_INDEX not implemented in gl_GetTexImage" );
break;
default:
gl_problem( ctx, "bad format in gl_GetTexImage" );
}
_mesa_pack_rgba_span( ctx, width, (const GLubyte (*)[4])rgba,
format, type, dest, &ctx->Pack,
ctx->ImageTransferState );
}
}
/* if we got the teximage from the device driver we'll discard it now */
if (discardImage) {
FREE(texImage->Data);
texImage->Data = NULL;
}
}
}
void
_mesa_TexSubImage1D( GLenum target, GLint level,
GLint xoffset, GLsizei width,
GLenum format, GLenum type,
const GLvoid *pixels )
{
GET_CURRENT_CONTEXT(ctx);
struct gl_texture_unit *texUnit;
struct gl_texture_object *texObj;
struct gl_texture_image *texImage;
GLboolean success = GL_FALSE;
if (subtexture_error_check(ctx, 1, target, level, xoffset, 0, 0,
width, 1, 1, format, type)) {
return; /* error was detected */
}
texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
texObj = texUnit->CurrentD[1];
texImage = texObj->Image[level];
assert(texImage);
if (width == 0 || !pixels)
return; /* no-op, not an error */
if (ctx->ImageTransferState == UPDATE_IMAGE_TRANSFER_STATE)
_mesa_update_image_transfer_state(ctx);
if (!ctx->ImageTransferState && ctx->Driver.TexSubImage1D) {
success = (*ctx->Driver.TexSubImage1D)( ctx, target, level, xoffset,
width, format, type, pixels,
&ctx->Unpack, texObj, texImage );
}
if (!success) {
/* XXX if Driver.TexSubImage1D, unpack image and try again? */
const GLint texComponents = components_in_intformat(texImage->Format);
const GLenum texFormat = texImage->Format;
const GLint xoffsetb = xoffset + texImage->Border;
GLboolean retain = GL_TRUE;
if (!texImage->Data) {
_mesa_get_teximage_from_driver( ctx, target, level, texObj );
if (!texImage->Data) {
make_null_texture(texImage);
}
if (!texImage->Data)
return; /* we're really out of luck! */
}
if (texFormat == GL_COLOR_INDEX) {
/* color index texture */
GLubyte *dst = texImage->Data + xoffsetb * texComponents;
const GLvoid *src = _mesa_image_address(&ctx->Unpack, pixels, width,
1, format, type, 0, 0, 0);
_mesa_unpack_index_span(ctx, width, GL_UNSIGNED_BYTE, dst,
type, src, &ctx->Unpack,
ctx->ImageTransferState);
}
else {
/* color texture */
GLubyte *dst = texImage->Data + xoffsetb * texComponents;
const GLvoid *src = _mesa_image_address(&ctx->Unpack, pixels, width,
1, format, type, 0, 0, 0);
/* XXX change for convolution */
_mesa_unpack_ubyte_color_span(ctx, width, texFormat, dst, format,
type, src, &ctx->Unpack,
ctx->ImageTransferState);
}
if (ctx->Driver.TexImage1D) {
(*ctx->Driver.TexImage1D)( ctx, target, level, texImage->Format,
GL_UNSIGNED_BYTE, texImage->Data,
&_mesa_native_packing, texObj, texImage,
&retain );
}
if (!retain && texImage->Data) {
FREE(texImage->Data);
texImage->Data = NULL;
}
}
/*gl_put_texobj_on_dirty_list( ctx, texUnit->CurrentD[1] );*/
}
void
_mesa_TexSubImage2D( GLenum target, GLint level,
GLint xoffset, GLint yoffset,
GLsizei width, GLsizei height,
GLenum format, GLenum type,
const GLvoid *pixels )
{
GET_CURRENT_CONTEXT(ctx);
struct gl_texture_unit *texUnit;
struct gl_texture_object *texObj;
struct gl_texture_image *texImage;
GLboolean success = GL_FALSE;
if (subtexture_error_check(ctx, 2, target, level, xoffset, yoffset, 0,
width, height, 1, format, type)) {
return; /* error was detected */
}
texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
texObj = _mesa_select_tex_object(ctx, texUnit, target);
texImage = texObj->Image[level];
assert(texImage);
if (width == 0 || height == 0 || !pixels)
return; /* no-op, not an error */
if (ctx->ImageTransferState == UPDATE_IMAGE_TRANSFER_STATE)
_mesa_update_image_transfer_state(ctx);
if (!ctx->ImageTransferState && ctx->Driver.TexSubImage2D) {
success = (*ctx->Driver.TexSubImage2D)( ctx, target, level, xoffset,
yoffset, width, height, format, type,
pixels, &ctx->Unpack, texObj, texImage );
}
if (!success) {
/* XXX if Driver.TexSubImage2D, unpack image and try again? */
const GLint texComponents = components_in_intformat(texImage->Format);
const GLenum texFormat = texImage->Format;
const GLint xoffsetb = xoffset + texImage->Border;
const GLint yoffsetb = yoffset + texImage->Border;
const GLint srcStride = _mesa_image_row_stride(&ctx->Unpack, width,
format, type);
const GLint dstStride = texImage->Width * texComponents *sizeof(GLubyte);
GLboolean retain = GL_TRUE;
if (!texImage->Data) {
_mesa_get_teximage_from_driver( ctx, target, level, texObj );
if (!texImage->Data) {
make_null_texture(texImage);
}
if (!texImage->Data)
return; /* we're really out of luck! */
}
if (texFormat == GL_COLOR_INDEX) {
/* color index texture */
GLubyte *dst = texImage->Data
+ (yoffsetb * texImage->Width + xoffsetb) * texComponents;
const GLubyte *src = _mesa_image_address(&ctx->Unpack, pixels,
width, height, format, type, 0, 0, 0);
GLint row;
for (row = 0; row < height; row++) {
_mesa_unpack_index_span(ctx, width, GL_UNSIGNED_BYTE, dst, type,
(const GLvoid *) src, &ctx->Unpack,
ctx->ImageTransferState);
src += srcStride;
dst += dstStride;
}
}
else {
/* color texture */
GLubyte *dst = texImage->Data
+ (yoffsetb * texImage->Width + xoffsetb) * texComponents;
const GLubyte *src = _mesa_image_address(&ctx->Unpack, pixels,
width, height, format, type, 0, 0, 0);
GLint row;
/* XXX change for convolution */
for (row = 0; row < height; row++) {
_mesa_unpack_ubyte_color_span(ctx, width, texFormat, dst, format,
type, (const GLvoid *) src,
&ctx->Unpack,
ctx->ImageTransferState);
src += srcStride;
dst += dstStride;
}
}
if (ctx->Driver.TexImage2D) {
(*ctx->Driver.TexImage2D)(ctx, target, level, texImage->Format,
GL_UNSIGNED_BYTE, texImage->Data,
&_mesa_native_packing, texObj, texImage,
&retain);
}
if (!retain && texImage->Data) {
FREE(texImage->Data);
texImage->Data = NULL;
}
#ifdef OLD_DD_TEXTURE
/* XXX this will be removed in the future */
if (ctx->Driver.TexSubImage) {
(*ctx->Driver.TexSubImage)(ctx, target, texObj, level,
xoffset, yoffset, width, height,
texImage->IntFormat, texImage);
}
else if (ctx->Driver.TexImage) {
(*ctx->Driver.TexImage)(ctx, GL_TEXTURE_2D, texObj,
level, texImage->IntFormat, texImage );
}
#endif
}
}
void
_mesa_TexSubImage3D( GLenum target, GLint level,
GLint xoffset, GLint yoffset, GLint zoffset,
GLsizei width, GLsizei height, GLsizei depth,
GLenum format, GLenum type,
const GLvoid *pixels )
{
GET_CURRENT_CONTEXT(ctx);
struct gl_texture_unit *texUnit;
struct gl_texture_object *texObj;
struct gl_texture_image *texImage;
GLboolean success = GL_FALSE;
if (subtexture_error_check(ctx, 3, target, level, xoffset, yoffset, zoffset,
width, height, depth, format, type)) {
return; /* error was detected */
}
texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
texObj = texUnit->CurrentD[3];
texImage = texObj->Image[level];
assert(texImage);
if (width == 0 || height == 0 || height == 0 || !pixels)
return; /* no-op, not an error */
if (ctx->ImageTransferState == UPDATE_IMAGE_TRANSFER_STATE)
_mesa_update_image_transfer_state(ctx);
if (!ctx->ImageTransferState && ctx->Driver.TexSubImage3D) {
success = (*ctx->Driver.TexSubImage3D)( ctx, target, level, xoffset,
yoffset, zoffset, width, height, depth, format,
type, pixels, &ctx->Unpack, texObj, texImage );
}
if (!success) {
/* XXX if Driver.TexSubImage3D, unpack image and try again? */
const GLint texComponents = components_in_intformat(texImage->Format);
const GLenum texFormat = texImage->Format;
const GLint xoffsetb = xoffset + texImage->Border;
const GLint yoffsetb = yoffset + texImage->Border;
const GLint zoffsetb = zoffset + texImage->Border;
const GLint texWidth = texImage->Width;
const GLint dstRectArea = texWidth * texImage->Height;
const GLint srcStride = _mesa_image_row_stride(&ctx->Unpack,
width, format, type);
const GLint dstStride = texWidth * texComponents * sizeof(GLubyte);
GLboolean retain = GL_TRUE;
if (texFormat == GL_COLOR_INDEX) {
/* color index texture */
GLint img, row;
for (img = 0; img < depth; img++) {
const GLubyte *src = _mesa_image_address(&ctx->Unpack, pixels,
width, height, format, type, img, 0, 0);
GLubyte *dst = texImage->Data + ((zoffsetb + img) * dstRectArea
+ yoffsetb * texWidth + xoffsetb) * texComponents;
for (row = 0; row < height; row++) {
_mesa_unpack_index_span(ctx, width, GL_UNSIGNED_BYTE, dst,
type, (const GLvoid *) src,
&ctx->Unpack, ctx->ImageTransferState);
src += srcStride;
dst += dstStride;
}
}
}
else {
/* color texture */
GLint img, row;
for (img = 0; img < depth; img++) {
const GLubyte *src = _mesa_image_address(&ctx->Unpack, pixels,
width, height, format, type, img, 0, 0);
GLubyte *dst = texImage->Data + ((zoffsetb + img) * dstRectArea
+ yoffsetb * texWidth + xoffsetb) * texComponents;
for (row = 0; row < height; row++) {
_mesa_unpack_ubyte_color_span(ctx, width, texFormat, dst,
format, type,
(const GLvoid *) src,
&ctx->Unpack,
ctx->ImageTransferState);
src += srcStride;
dst += dstStride;
}
}
}
if (ctx->Driver.TexImage3D) {
(*ctx->Driver.TexImage3D)(ctx, target, level, texImage->Format,
GL_UNSIGNED_BYTE, texImage->Data,
&_mesa_native_packing, texObj, texImage,
&retain);
}
if (!retain && texImage->Data) {
FREE(texImage->Data);
texImage->Data = NULL;
}
}
}
/*
* Read an RGBA image from the frame buffer.
* This is used by glCopyTexSubImage[12]D().
* Input: ctx - the context
* x, y - lower left corner
* width, height - size of region to read
* Return: pointer to block of GL_RGBA, GLubyte data.
*/
static GLubyte *
read_color_image( GLcontext *ctx, GLint x, GLint y,
GLsizei width, GLsizei height )
{
GLint stride, i;
GLubyte *image, *dst;
image = (GLubyte *) MALLOC(width * height * 4 * sizeof(GLubyte));
if (!image)
return NULL;
/* Select buffer to read from */
(*ctx->Driver.SetReadBuffer)( ctx, ctx->ReadBuffer,
ctx->Pixel.DriverReadBuffer );
/* XXX TODO we have to apply pixel transfer ops here! */
dst = image;
stride = width * 4 * sizeof(GLubyte);
for (i = 0; i < height; i++) {
gl_read_rgba_span( ctx, ctx->ReadBuffer, width, x, y + i,
(GLubyte (*)[4]) dst );
dst += stride;
}
/* Read from draw buffer (the default) */
(*ctx->Driver.SetReadBuffer)( ctx, ctx->DrawBuffer,
ctx->Color.DriverDrawBuffer );
return image;
}
void
_mesa_CopyTexImage1D( GLenum target, GLint level,
GLenum internalFormat,
GLint x, GLint y,
GLsizei width, GLint border )
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glCopyTexImage1D");
if (copytexture_error_check(ctx, 1, target, level, internalFormat,
width, 1, border))
return;
if (ctx->ImageTransferState == UPDATE_IMAGE_TRANSFER_STATE)
_mesa_update_image_transfer_state(ctx);
if (ctx->ImageTransferState || !ctx->Driver.CopyTexImage1D
|| !(*ctx->Driver.CopyTexImage1D)(ctx, target, level,
internalFormat, x, y, width, border))
{
struct gl_pixelstore_attrib unpackSave;
/* get image from framebuffer */
GLubyte *image = read_color_image( ctx, x, y, width, 1 );
if (!image) {
gl_error( ctx, GL_OUT_OF_MEMORY, "glCopyTexImage1D" );
return;
}
/* call glTexImage1D to redefine the texture */
unpackSave = ctx->Unpack;
ctx->Unpack = _mesa_native_packing;
(*ctx->Exec->TexImage1D)( target, level, internalFormat, width,
border, GL_RGBA, GL_UNSIGNED_BYTE, image );
ctx->Unpack = unpackSave;
FREE(image);
}
}
void
_mesa_CopyTexImage2D( GLenum target, GLint level, GLenum internalFormat,
GLint x, GLint y, GLsizei width, GLsizei height,
GLint border )
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glCopyTexImage2D");
if (copytexture_error_check(ctx, 2, target, level, internalFormat,
width, height, border))
return;
if (ctx->ImageTransferState == UPDATE_IMAGE_TRANSFER_STATE)
_mesa_update_image_transfer_state(ctx);
if (ctx->ImageTransferState || !ctx->Driver.CopyTexImage2D
|| !(*ctx->Driver.CopyTexImage2D)(ctx, target, level,
internalFormat, x, y, width, height, border))
{
struct gl_pixelstore_attrib unpackSave;
/* get image from framebuffer */
GLubyte *image = read_color_image( ctx, x, y, width, height );
if (!image) {
gl_error( ctx, GL_OUT_OF_MEMORY, "glCopyTexImage2D" );
return;
}
/* call glTexImage2D to redefine the texture */
unpackSave = ctx->Unpack;
ctx->Unpack = _mesa_native_packing;
(ctx->Exec->TexImage2D)( target, level, internalFormat, width,
height, border, GL_RGBA, GL_UNSIGNED_BYTE, image );
ctx->Unpack = unpackSave;
FREE(image);
}
}
void
_mesa_CopyTexSubImage1D( GLenum target, GLint level,
GLint xoffset, GLint x, GLint y, GLsizei width )
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glCopyTexSubImage1D");
if (copytexsubimage_error_check(ctx, 1, target, level,
xoffset, 0, 0, width, 1))
return;
if (ctx->ImageTransferState == UPDATE_IMAGE_TRANSFER_STATE)
_mesa_update_image_transfer_state(ctx);
if (ctx->ImageTransferState || !ctx->Driver.CopyTexSubImage1D
|| !(*ctx->Driver.CopyTexSubImage1D)(ctx, target, level,
xoffset, x, y, width)) {
struct gl_texture_unit *texUnit;
struct gl_texture_image *teximage;
struct gl_pixelstore_attrib unpackSave;
GLubyte *image;
texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
teximage = texUnit->CurrentD[1]->Image[level];
assert(teximage);
/* get image from frame buffer */
image = read_color_image(ctx, x, y, width, 1);
if (!image) {
gl_error( ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage2D" );
return;
}
/* now call glTexSubImage1D to do the real work */
unpackSave = ctx->Unpack;
ctx->Unpack = _mesa_native_packing;
_mesa_TexSubImage1D(target, level, xoffset, width,
GL_RGBA, GL_UNSIGNED_BYTE, image);
ctx->Unpack = unpackSave;
FREE(image);
}
}
void
_mesa_CopyTexSubImage2D( GLenum target, GLint level,
GLint xoffset, GLint yoffset,
GLint x, GLint y, GLsizei width, GLsizei height )
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glCopyTexSubImage2D");
if (copytexsubimage_error_check(ctx, 2, target, level,
xoffset, yoffset, 0, width, height))
return;
if (ctx->ImageTransferState == UPDATE_IMAGE_TRANSFER_STATE)
_mesa_update_image_transfer_state(ctx);
if (ctx->ImageTransferState || !ctx->Driver.CopyTexSubImage2D
|| !(*ctx->Driver.CopyTexSubImage2D)(ctx, target, level,
xoffset, yoffset, x, y, width, height )) {
struct gl_texture_unit *texUnit;
struct gl_texture_image *teximage;
struct gl_pixelstore_attrib unpackSave;
GLubyte *image;
texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
teximage = texUnit->CurrentD[2]->Image[level];
assert(teximage);
/* get image from frame buffer */
image = read_color_image(ctx, x, y, width, height);
if (!image) {
gl_error( ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage2D" );
return;
}
/* now call glTexSubImage2D to do the real work */
unpackSave = ctx->Unpack;
ctx->Unpack = _mesa_native_packing;
_mesa_TexSubImage2D(target, level, xoffset, yoffset, width, height,
GL_RGBA, GL_UNSIGNED_BYTE, image);
ctx->Unpack = unpackSave;
FREE(image);
}
}
void
_mesa_CopyTexSubImage3D( GLenum target, GLint level,
GLint xoffset, GLint yoffset, GLint zoffset,
GLint x, GLint y, GLsizei width, GLsizei height )
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glCopyTexSubImage3D");
if (copytexsubimage_error_check(ctx, 3, target, level,
xoffset, yoffset, zoffset, width, height))
return;
if (ctx->ImageTransferState == UPDATE_IMAGE_TRANSFER_STATE)
_mesa_update_image_transfer_state(ctx);
if (ctx->ImageTransferState || !ctx->Driver.CopyTexSubImage3D
|| !(*ctx->Driver.CopyTexSubImage3D)(ctx, target, level,
xoffset, yoffset, zoffset, x, y, width, height )) {
struct gl_texture_unit *texUnit;
struct gl_texture_image *teximage;
struct gl_pixelstore_attrib unpackSave;
GLubyte *image;
texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
teximage = texUnit->CurrentD[3]->Image[level];
assert(teximage);
/* get image from frame buffer */
image = read_color_image(ctx, x, y, width, height);
if (!image) {
gl_error( ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage2D" );
return;
}
/* now call glTexSubImage2D to do the real work */
unpackSave = ctx->Unpack;
ctx->Unpack = _mesa_native_packing;
_mesa_TexSubImage3D(target, level, xoffset, yoffset, zoffset,
width, height, 1, GL_RGBA, GL_UNSIGNED_BYTE, image);
ctx->Unpack = unpackSave;
FREE(image);
}
}
void
_mesa_CompressedTexImage1DARB(GLenum target, GLint level,
GLenum internalFormat, GLsizei width,
GLint border, GLsizei imageSize,
const GLvoid *data)
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glCompressedTexImage1DARB");
if (target == GL_TEXTURE_1D) {
struct gl_texture_unit *texUnit;
struct gl_texture_object *texObj;
struct gl_texture_image *texImage;
if (texture_error_check(ctx, target, level, internalFormat,
GL_NONE, GL_NONE, 1, width, 1, 1, border)) {
return; /* error in texture image was detected */
}
texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
texObj = texUnit->CurrentD[1];
texImage = texObj->Image[level];
if (!texImage) {
texImage = _mesa_alloc_texture_image();
texObj->Image[level] = texImage;
if (!texImage) {
gl_error(ctx, GL_OUT_OF_MEMORY, "glCompressedTexImage1DARB");
return;
}
}
else if (texImage->Data) {
FREE(texImage->Data);
texImage->Data = NULL;
}
/* setup the teximage struct's fields */
init_texture_image(texImage, width, 1, 1, border, internalFormat);
/* process the texture image */
if (data) {
GLboolean retain = GL_TRUE;
GLboolean success = GL_FALSE;
if (ctx->Driver.CompressedTexImage1D) {
success = (*ctx->Driver.CompressedTexImage1D)( ctx, target, level,
data, texObj, texImage, &retain);
}
if (retain || !success) {
/* make internal copy of the texture image */
GLuint imageSize = _mesa_compressed_image_size(internalFormat,
width, 1, 1);
texImage->Data = MALLOC(imageSize);
if (texImage->Data) {
MEMCPY(texImage->Data, data, imageSize);
}
}
if (!retain && texImage->Data) {
FREE(texImage->Data);
texImage->Data = NULL;
}
}
else {
make_null_texture(texImage);
if (ctx->Driver.CompressedTexImage1D) {
GLboolean retain;
(*ctx->Driver.CompressedTexImage1D)( ctx, target, level,
texImage->Data, texObj, texImage, &retain);
}
}
/* state update */
gl_put_texobj_on_dirty_list( ctx, texObj );
ctx->NewState |= NEW_TEXTURING;
}
else if (target == GL_PROXY_TEXTURE_1D) {
/* Proxy texture: check for errors and update proxy state */
if (texture_error_check(ctx, target, level, internalFormat,
GL_NONE, GL_NONE, 1, width, 1, 1, border)) {
/* if error, clear all proxy texture image parameters */
if (level>=0 && level<ctx->Const.MaxTextureLevels) {
MEMSET( ctx->Texture.Proxy1D->Image[level], 0,
sizeof(struct gl_texture_image) );
}
}
else {
/* if no error, update proxy texture image parameters */
init_texture_image(ctx->Texture.Proxy1D->Image[level],
width, 1, 1, border, internalFormat);
}
}
else {
gl_error( ctx, GL_INVALID_ENUM, "glCompressedTexImage1DARB(target)" );
return;
}
}
void
_mesa_CompressedTexImage2DARB(GLenum target, GLint level,
GLenum internalFormat, GLsizei width,
GLsizei height, GLint border, GLsizei imageSize,
const GLvoid *data)
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glCompressedTexImage2DARB");
if (target==GL_TEXTURE_2D ||
(ctx->Extensions.HaveTextureCubeMap &&
target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB &&
target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB)) {
struct gl_texture_unit *texUnit;
struct gl_texture_object *texObj;
struct gl_texture_image *texImage;
if (texture_error_check(ctx, target, level, internalFormat,
GL_NONE, GL_NONE, 1, width, height, 1, border)) {
return; /* error in texture image was detected */
}
texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
texObj = texUnit->CurrentD[2];
texImage = texObj->Image[level];
if (!texImage) {
texImage = _mesa_alloc_texture_image();
texObj->Image[level] = texImage;
if (!texImage) {
gl_error(ctx, GL_OUT_OF_MEMORY, "glCompressedTexImage2DARB");
return;
}
}
else if (texImage->Data) {
FREE(texImage->Data);
texImage->Data = NULL;
}
/* setup the teximage struct's fields */
init_texture_image(texImage, width, height, 1, border, internalFormat);
/* process the texture image */
if (data) {
GLboolean retain = GL_TRUE;
GLboolean success = GL_FALSE;
if (ctx->Driver.CompressedTexImage2D) {
success = (*ctx->Driver.CompressedTexImage2D)( ctx, target, level,
data, texObj, texImage, &retain);
}
if (retain || !success) {
/* make internal copy of the texture image */
GLuint imageSize = _mesa_compressed_image_size(internalFormat,
width, height, 1);
texImage->Data = MALLOC(imageSize);
if (texImage->Data) {
MEMCPY(texImage->Data, data, imageSize);
}
}
if (!retain && texImage->Data) {
FREE(texImage->Data);
texImage->Data = NULL;
}
}
else {
make_null_texture(texImage);
if (ctx->Driver.CompressedTexImage2D) {
GLboolean retain;
(*ctx->Driver.CompressedTexImage2D)( ctx, target, level,
texImage->Data, texObj, texImage, &retain);
}
}
/* state update */
gl_put_texobj_on_dirty_list( ctx, texObj );
ctx->NewState |= NEW_TEXTURING;
}
else if (target == GL_PROXY_TEXTURE_2D) {
/* Proxy texture: check for errors and update proxy state */
if (texture_error_check(ctx, target, level, internalFormat,
GL_NONE, GL_NONE, 1, width, 1, 1, border)) {
/* if error, clear all proxy texture image parameters */
if (level>=0 && level<ctx->Const.MaxTextureLevels) {
MEMSET( ctx->Texture.Proxy2D->Image[level], 0,
sizeof(struct gl_texture_image) );
}
}
else {
/* if no error, update proxy texture image parameters */
init_texture_image(ctx->Texture.Proxy2D->Image[level],
width, 1, 1, border, internalFormat);
}
}
else {
gl_error( ctx, GL_INVALID_ENUM, "glCompressedTexImage2DARB(target)" );
return;
}
}
void
_mesa_CompressedTexImage3DARB(GLenum target, GLint level,
GLenum internalFormat, GLsizei width,
GLsizei height, GLsizei depth, GLint border,
GLsizei imageSize, const GLvoid *data)
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glCompressedTexImage3DARB");
if (target == GL_TEXTURE_3D) {
struct gl_texture_unit *texUnit;
struct gl_texture_object *texObj;
struct gl_texture_image *texImage;
if (texture_error_check(ctx, target, level, internalFormat,
GL_NONE, GL_NONE, 1, width, height, depth, border)) {
return; /* error in texture image was detected */
}
texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
texObj = texUnit->CurrentD[3];
texImage = texObj->Image[level];
if (!texImage) {
texImage = _mesa_alloc_texture_image();
texObj->Image[level] = texImage;
if (!texImage) {
gl_error(ctx, GL_OUT_OF_MEMORY, "glCompressedTexImage3DARB");
return;
}
}
else if (texImage->Data) {
FREE(texImage->Data);
texImage->Data = NULL;
}
/* setup the teximage struct's fields */
init_texture_image(texImage, width, height, depth, border, internalFormat);
/* process the texture image */
if (data) {
GLboolean retain = GL_TRUE;
GLboolean success = GL_FALSE;
if (ctx->Driver.CompressedTexImage3D) {
success = (*ctx->Driver.CompressedTexImage3D)( ctx, target, level,
data, texObj, texImage, &retain);
}
if (retain || !success) {
/* make internal copy of the texture image */
GLuint imageSize = _mesa_compressed_image_size(internalFormat,
width, height, depth);
texImage->Data = MALLOC(imageSize);
if (texImage->Data) {
MEMCPY(texImage->Data, data, imageSize);
}
}
if (!retain && texImage->Data) {
FREE(texImage->Data);
texImage->Data = NULL;
}
}
else {
make_null_texture(texImage);
if (ctx->Driver.CompressedTexImage3D) {
GLboolean retain;
(*ctx->Driver.CompressedTexImage3D)( ctx, target, level,
texImage->Data, texObj, texImage, &retain);
}
}
/* state update */
gl_put_texobj_on_dirty_list( ctx, texObj );
ctx->NewState |= NEW_TEXTURING;
}
else if (target == GL_PROXY_TEXTURE_3D) {
/* Proxy texture: check for errors and update proxy state */
if (texture_error_check(ctx, target, level, internalFormat,
GL_NONE, GL_NONE, 1, width, height, depth, border)) {
/* if error, clear all proxy texture image parameters */
if (level>=0 && level<ctx->Const.MaxTextureLevels) {
MEMSET( ctx->Texture.Proxy3D->Image[level], 0,
sizeof(struct gl_texture_image) );
}
}
else {
/* if no error, update proxy texture image parameters */
init_texture_image(ctx->Texture.Proxy3D->Image[level],
width, 1, 1, border, internalFormat);
}
}
else {
gl_error( ctx, GL_INVALID_ENUM, "glCompressedTexImage3DARB(target)" );
return;
}
}
void
_mesa_CompressedTexSubImage1DARB(GLenum target, GLint level, GLint xoffset,
GLsizei width, GLenum format,
GLsizei imageSize, const GLvoid *data)
{
GET_CURRENT_CONTEXT(ctx);
struct gl_texture_unit *texUnit;
struct gl_texture_object *texObj;
struct gl_texture_image *texImage;
GLboolean success = GL_FALSE;
if (subtexture_error_check(ctx, 1, target, level, xoffset, 0, 0,
width, 1, 1, format, GL_NONE)) {
return; /* error was detected */
}
texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
texObj = _mesa_select_tex_object(ctx, texUnit, target);
texImage = texObj->Image[level];
assert(texImage);
if (width == 0 || !data)
return; /* no-op, not an error */
if (ctx->Driver.CompressedTexSubImage1D) {
success = (*ctx->Driver.CompressedTexSubImage1D)(ctx, target, level,
xoffset, width, format, imageSize, data, texObj, texImage);
}
if (!success) {
/* XXX what else can we do? */
gl_problem(ctx, "glCompressedTexSubImage1DARB failed!");
return;
}
}
void
_mesa_CompressedTexSubImage2DARB(GLenum target, GLint level, GLint xoffset,
GLint yoffset, GLsizei width, GLsizei height,
GLenum format, GLsizei imageSize,
const GLvoid *data)
{
GET_CURRENT_CONTEXT(ctx);
struct gl_texture_unit *texUnit;
struct gl_texture_object *texObj;
struct gl_texture_image *texImage;
GLboolean success = GL_FALSE;
if (subtexture_error_check(ctx, 2, target, level, xoffset, yoffset, 0,
width, height, 1, format, GL_NONE)) {
return; /* error was detected */
}
texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
texObj = _mesa_select_tex_object(ctx, texUnit, target);
texImage = texObj->Image[level];
assert(texImage);
if (width == 0 || height == 0 || !data)
return; /* no-op, not an error */
if (ctx->Driver.CompressedTexSubImage2D) {
success = (*ctx->Driver.CompressedTexSubImage2D)(ctx, target, level,
xoffset, yoffset, width, height, format,
imageSize, data, texObj, texImage);
}
if (!success) {
/* XXX what else can we do? */
gl_problem(ctx, "glCompressedTexSubImage2DARB failed!");
return;
}
}
void
_mesa_CompressedTexSubImage3DARB(GLenum target, GLint level, GLint xoffset,
GLint yoffset, GLint zoffset, GLsizei width,
GLsizei height, GLsizei depth, GLenum format,
GLsizei imageSize, const GLvoid *data)
{
GET_CURRENT_CONTEXT(ctx);
struct gl_texture_unit *texUnit;
struct gl_texture_object *texObj;
struct gl_texture_image *texImage;
GLboolean success = GL_FALSE;
if (subtexture_error_check(ctx, 3, target, level, xoffset, yoffset, zoffset,
width, height, depth, format, GL_NONE)) {
return; /* error was detected */
}
texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
texObj = _mesa_select_tex_object(ctx, texUnit, target);
texImage = texObj->Image[level];
assert(texImage);
if (width == 0 || height == 0 || depth == 0 || !data)
return; /* no-op, not an error */
if (ctx->Driver.CompressedTexSubImage3D) {
success = (*ctx->Driver.CompressedTexSubImage3D)(ctx, target, level,
xoffset, yoffset, zoffset, width, height, depth,
format, imageSize, data, texObj, texImage);
}
if (!success) {
/* XXX what else can we do? */
gl_problem(ctx, "glCompressedTexSubImage3DARB failed!");
return;
}
}
void
_mesa_GetCompressedTexImageARB(GLenum target, GLint level, GLvoid *img)
{
GET_CURRENT_CONTEXT(ctx);
const struct gl_texture_object *texObj;
struct gl_texture_image *texImage;
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glGetCompressedTexImageARB");
if (level < 0 || level >= ctx->Const.MaxTextureLevels) {
gl_error( ctx, GL_INVALID_VALUE, "glGetCompressedTexImageARB(level)" );
return;
}
switch (target) {
case GL_TEXTURE_1D:
texObj = ctx->Texture.Unit[ctx->Texture.CurrentUnit].CurrentD[1];
texImage = texObj->Image[level];
break;
case GL_TEXTURE_2D:
texObj = ctx->Texture.Unit[ctx->Texture.CurrentUnit].CurrentD[2];
texImage = texObj->Image[level];
break;
case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB:
texObj = ctx->Texture.Unit[ctx->Texture.CurrentUnit].CurrentCubeMap;
texImage = texObj->Image[level];
break;
case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB:
texObj = ctx->Texture.Unit[ctx->Texture.CurrentUnit].CurrentCubeMap;
texImage = texObj->NegX[level];
break;
case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB:
texObj = ctx->Texture.Unit[ctx->Texture.CurrentUnit].CurrentCubeMap;
texImage = texObj->PosY[level];
break;
case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB:
texObj = ctx->Texture.Unit[ctx->Texture.CurrentUnit].CurrentCubeMap;
texImage = texObj->NegY[level];
break;
case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB:
texObj = ctx->Texture.Unit[ctx->Texture.CurrentUnit].CurrentCubeMap;
texImage = texObj->PosZ[level];
break;
case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB:
texObj = ctx->Texture.Unit[ctx->Texture.CurrentUnit].CurrentCubeMap;
texImage = texObj->NegZ[level];
break;
case GL_TEXTURE_3D:
texObj = ctx->Texture.Unit[ctx->Texture.CurrentUnit].CurrentD[3];
texImage = texObj->Image[level];
break;
default:
gl_error(ctx, GL_INVALID_ENUM, "glGetCompressedTexImageARB(target)");
return;
}
if (!texImage) {
/* invalid mipmap level */
gl_error(ctx, GL_INVALID_VALUE, "glGetCompressedTexImageARB(level)");
return;
}
if (!texImage->IsCompressed) {
gl_error(ctx, GL_INVALID_OPERATION, "glGetCompressedTexImageARB");
return;
}
if (!img)
return;
if (ctx->Driver.GetCompressedTexImage) {
(*ctx->Driver.GetCompressedTexImage)(ctx, target, level, img, texObj,
texImage);
}
else {
gl_problem(ctx, "Driver doesn't implement GetCompressedTexImage");
}
}