diff options
Diffstat (limited to 'mesalib/src/mesa/main/texgetimage.c')
| -rw-r--r-- | mesalib/src/mesa/main/texgetimage.c | 1706 |
1 files changed, 853 insertions, 853 deletions
diff --git a/mesalib/src/mesa/main/texgetimage.c b/mesalib/src/mesa/main/texgetimage.c index 7e1fc3695..2830dda86 100644 --- a/mesalib/src/mesa/main/texgetimage.c +++ b/mesalib/src/mesa/main/texgetimage.c @@ -1,853 +1,853 @@ -/*
- * Mesa 3-D graphics library
- * Version: 7.7
- *
- * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
- * Copyright (c) 2009 VMware, Inc.
- *
- * 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.
- */
-
-
-/**
- * Code for glGetTexImage() and glGetCompressedTexImage().
- */
-
-
-#include "glheader.h"
-#include "bufferobj.h"
-#include "enums.h"
-#include "context.h"
-#include "formats.h"
-#include "format_unpack.h"
-#include "image.h"
-#include "mfeatures.h"
-#include "mtypes.h"
-#include "pack.h"
-#include "pbo.h"
-#include "texcompress.h"
-#include "texgetimage.h"
-#include "teximage.h"
-
-
-
-/**
- * Can the given type represent negative values?
- */
-static INLINE GLboolean
-type_with_negative_values(GLenum type)
-{
- switch (type) {
- case GL_BYTE:
- case GL_SHORT:
- case GL_INT:
- case GL_FLOAT:
- case GL_HALF_FLOAT_ARB:
- return GL_TRUE;
- default:
- return GL_FALSE;
- }
-}
-
-
-/**
- * glGetTexImage for depth/Z pixels.
- */
-static void
-get_tex_depth(struct gl_context *ctx, GLuint dimensions,
- GLenum format, GLenum type, GLvoid *pixels,
- const struct gl_texture_image *texImage)
-{
- const GLint width = texImage->Width;
- const GLint height = texImage->Height;
- const GLint depth = texImage->Depth;
- GLint img, row;
- GLfloat *depthRow = (GLfloat *) malloc(width * sizeof(GLfloat));
- const GLint texelSize = _mesa_get_format_bytes(texImage->TexFormat);
-
- if (!depthRow) {
- _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage");
- return;
- }
-
- for (img = 0; img < depth; img++) {
- for (row = 0; row < height; row++) {
- void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels,
- width, height, format, type,
- img, row, 0);
- const GLubyte *src = (GLubyte *) texImage->Data +
- (texImage->ImageOffsets[img] +
- texImage->RowStride * row) * texelSize;
-
- _mesa_unpack_float_z_row(texImage->TexFormat, width, src, depthRow);
-
- _mesa_pack_depth_span(ctx, width, dest, type, depthRow, &ctx->Pack);
- }
- }
-
- free(depthRow);
-}
-
-
-/**
- * glGetTexImage for depth/stencil pixels.
- */
-static void
-get_tex_depth_stencil(struct gl_context *ctx, GLuint dimensions,
- GLenum format, GLenum type, GLvoid *pixels,
- const struct gl_texture_image *texImage)
-{
- const GLint width = texImage->Width;
- const GLint height = texImage->Height;
- const GLint depth = texImage->Depth;
- const GLint rowstride = texImage->RowStride;
- const GLuint *src = (const GLuint *) texImage->Data;
- GLint img, row;
-
- for (img = 0; img < depth; img++) {
- for (row = 0; row < height; row++) {
- void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels,
- width, height, format, type,
- img, row, 0);
- memcpy(dest, src, width * sizeof(GLuint));
- if (ctx->Pack.SwapBytes) {
- _mesa_swap4((GLuint *) dest, width);
- }
-
- src += rowstride;
- }
- }
-}
-
-
-/**
- * glGetTexImage for YCbCr pixels.
- */
-static void
-get_tex_ycbcr(struct gl_context *ctx, GLuint dimensions,
- GLenum format, GLenum type, GLvoid *pixels,
- const struct gl_texture_image *texImage)
-{
- const GLint width = texImage->Width;
- const GLint height = texImage->Height;
- const GLint depth = texImage->Depth;
- const GLint rowstride = texImage->RowStride;
- const GLushort *src = (const GLushort *) texImage->Data;
- GLint img, row;
-
- for (img = 0; img < depth; img++) {
- for (row = 0; row < height; row++) {
- void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels,
- width, height, format, type,
- img, row, 0);
- memcpy(dest, src, width * sizeof(GLushort));
-
- /* check for byte swapping */
- if ((texImage->TexFormat == MESA_FORMAT_YCBCR
- && type == GL_UNSIGNED_SHORT_8_8_REV_MESA) ||
- (texImage->TexFormat == 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);
- }
-
- src += rowstride;
- }
- }
-}
-
-
-/**
- * glGetTexImage for color formats (RGBA, RGB, alpha, LA, etc).
- * Compressed textures are handled here as well.
- */
-static void
-get_tex_rgba(struct gl_context *ctx, GLuint dimensions,
- GLenum format, GLenum type, GLvoid *pixels,
- struct gl_texture_image *texImage)
-{
- /* don't want to apply sRGB -> RGB conversion here so override the format */
- const gl_format texFormat = _mesa_get_srgb_format_linear(texImage->TexFormat);
- const GLuint width = texImage->Width;
- const GLuint height = texImage->Height;
- const GLuint depth = texImage->Depth;
- const GLenum dataType = _mesa_get_format_datatype(texFormat);
- const GLenum baseFormat = _mesa_get_format_base_format(texFormat);
- /* Normally, no pixel transfer ops are performed during glGetTexImage.
- * The only possible exception is component clamping to [0,1].
- */
- GLbitfield transferOps = 0x0;
-
- /* In general, clamping does not apply to glGetTexImage, except when
- * the returned type of the image can't hold negative values.
- */
- if (!type_with_negative_values(type)) {
- /* the returned image type can't have negative values */
- if (dataType == GL_FLOAT ||
- dataType == GL_SIGNED_NORMALIZED ||
- format == GL_LUMINANCE ||
- format == GL_LUMINANCE_ALPHA) {
- transferOps |= IMAGE_CLAMP_BIT;
- }
- }
-
- if (_mesa_is_format_compressed(texFormat)) {
- /* Decompress into temp buffer, then pack into user buffer */
- GLfloat *tempImage, *srcRow;
- GLuint row;
-
- tempImage = (GLfloat *) malloc(texImage->Width * texImage->Height *
- texImage->Depth * 4 * sizeof(GLfloat));
- if (!tempImage) {
- _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage()");
- return;
- }
-
- _mesa_decompress_image(texFormat, texImage->Width, texImage->Height,
- texImage->Data, texImage->RowStride, tempImage);
-
- if (baseFormat == GL_LUMINANCE ||
- baseFormat == GL_LUMINANCE_ALPHA) {
- /* Set green and blue to zero since the pack function here will
- * compute L=R+G+B.
- */
- GLuint i;
- for (i = 0; i < width * height; i++) {
- tempImage[i * 4 + GCOMP] = tempImage[i * 4 + BCOMP] = 0.0f;
- }
- }
-
- srcRow = tempImage;
- for (row = 0; row < height; row++) {
- void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels,
- width, height, format, type,
- 0, row, 0);
-
- _mesa_pack_rgba_span_float(ctx, width, (GLfloat (*)[4]) srcRow,
- format, type, dest, &ctx->Pack, transferOps);
- srcRow += width * 4;
- }
-
- free(tempImage);
- }
- else {
- /* No decompression needed */
- const GLint texelSize = _mesa_get_format_bytes(texFormat);
- GLuint img, row;
- GLfloat (*rgba)[4];
-
- rgba = (GLfloat (*)[4]) malloc(4 * width * sizeof(GLfloat));
- if (!rgba) {
- _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage()");
- return;
- }
-
- for (img = 0; img < depth; img++) {
- for (row = 0; row < height; row++) {
- void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels,
- width, height, format, type,
- img, row, 0);
- const GLubyte *src = (const GLubyte *) texImage->Data +
- (texImage->ImageOffsets[img] +
- texImage->RowStride * row) * texelSize;
-
- _mesa_unpack_rgba_row(texFormat, width, src, rgba);
-
- if (texImage->_BaseFormat == GL_ALPHA) {
- GLint col;
- for (col = 0; col < width; col++) {
- rgba[col][RCOMP] = 0.0F;
- rgba[col][GCOMP] = 0.0F;
- rgba[col][BCOMP] = 0.0F;
- }
- }
- else if (texImage->_BaseFormat == GL_LUMINANCE) {
- GLint col;
- for (col = 0; col < width; col++) {
- rgba[col][GCOMP] = 0.0F;
- rgba[col][BCOMP] = 0.0F;
- rgba[col][ACOMP] = 1.0F;
- }
- }
- else if (texImage->_BaseFormat == GL_LUMINANCE_ALPHA) {
- GLint col;
- for (col = 0; col < width; col++) {
- rgba[col][GCOMP] = 0.0F;
- rgba[col][BCOMP] = 0.0F;
- }
- }
- else if (texImage->_BaseFormat == GL_INTENSITY) {
- GLint col;
- for (col = 0; col < width; col++) {
- rgba[col][GCOMP] = 0.0F;
- rgba[col][BCOMP] = 0.0F;
- rgba[col][ACOMP] = 1.0F;
- }
- }
-
- _mesa_pack_rgba_span_float(ctx, width, (GLfloat (*)[4]) rgba,
- format, type, dest,
- &ctx->Pack, transferOps);
- }
- }
-
- free(rgba);
- }
-}
-
-
-/**
- * Try to do glGetTexImage() with simple memcpy().
- * \return GL_TRUE if done, GL_FALSE otherwise
- */
-static GLboolean
-get_tex_memcpy(struct gl_context *ctx, GLenum format, GLenum type, GLvoid *pixels,
- const struct gl_texture_object *texObj,
- const struct gl_texture_image *texImage)
-{
- GLboolean memCopy = GL_FALSE;
-
- /* Texture image should have been mapped already */
- assert(texImage->Data);
-
- /*
- * Check if the src/dst formats are compatible.
- * Also note that GL's pixel transfer ops don't apply to glGetTexImage()
- * so we don't have to worry about those.
- * XXX more format combinations could be supported here.
- */
- if ((texObj->Target == GL_TEXTURE_1D ||
- texObj->Target == GL_TEXTURE_2D ||
- texObj->Target == GL_TEXTURE_RECTANGLE ||
- (texObj->Target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X &&
- texObj->Target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z))) {
- if ((texImage->TexFormat == MESA_FORMAT_ARGB8888 ||
- texImage->TexFormat == MESA_FORMAT_SARGB8) &&
- format == GL_BGRA &&
- (type == GL_UNSIGNED_BYTE || type == GL_UNSIGNED_INT_8_8_8_8_REV) &&
- !ctx->Pack.SwapBytes &&
- _mesa_little_endian()) {
- memCopy = GL_TRUE;
- }
- else if ((texImage->TexFormat == MESA_FORMAT_AL88 ||
- texImage->TexFormat == MESA_FORMAT_SLA8) &&
- format == GL_LUMINANCE_ALPHA &&
- type == GL_UNSIGNED_BYTE &&
- !ctx->Pack.SwapBytes &&
- _mesa_little_endian()) {
- memCopy = GL_TRUE;
- }
- else if ((texImage->TexFormat == MESA_FORMAT_L8 ||
- texImage->TexFormat == MESA_FORMAT_SL8) &&
- format == GL_LUMINANCE &&
- type == GL_UNSIGNED_BYTE) {
- memCopy = GL_TRUE;
- }
- else if (texImage->TexFormat == MESA_FORMAT_L16 &&
- format == GL_LUMINANCE &&
- type == GL_UNSIGNED_SHORT) {
- memCopy = GL_TRUE;
- }
- else if (texImage->TexFormat == MESA_FORMAT_A8 &&
- format == GL_ALPHA &&
- type == GL_UNSIGNED_BYTE) {
- memCopy = GL_TRUE;
- }
- else if (texImage->TexFormat == MESA_FORMAT_A16 &&
- format == GL_ALPHA &&
- type == GL_UNSIGNED_SHORT) {
- memCopy = GL_TRUE;
- }
- }
-
- if (memCopy) {
- const GLuint bpp = _mesa_get_format_bytes(texImage->TexFormat);
- const GLuint bytesPerRow = texImage->Width * bpp;
- GLubyte *dst =
- _mesa_image_address2d(&ctx->Pack, pixels, texImage->Width,
- texImage->Height, format, type, 0, 0);
- const GLint dstRowStride =
- _mesa_image_row_stride(&ctx->Pack, texImage->Width, format, type);
- const GLubyte *src = texImage->Data;
- const GLint srcRowStride = texImage->RowStride * bpp;
- GLuint row;
-
- if (bytesPerRow == dstRowStride && bytesPerRow == srcRowStride) {
- memcpy(dst, src, bytesPerRow * texImage->Height);
- }
- else {
- for (row = 0; row < texImage->Height; row++) {
- memcpy(dst, src, bytesPerRow);
- dst += dstRowStride;
- src += srcRowStride;
- }
- }
- }
-
- return memCopy;
-}
-
-
-/**
- * This is the software fallback for Driver.GetTexImage().
- * All error checking will have been done before this routine is called.
- * The texture image must be mapped.
- */
-void
-_mesa_get_teximage(struct gl_context *ctx, GLenum target, GLint level,
- GLenum format, GLenum type, GLvoid *pixels,
- struct gl_texture_object *texObj,
- struct gl_texture_image *texImage)
-{
- GLuint dimensions;
-
- /* If we get here, the texture image should be mapped */
- assert(texImage->Data);
-
- switch (target) {
- case GL_TEXTURE_1D:
- dimensions = 1;
- break;
- case GL_TEXTURE_3D:
- dimensions = 3;
- break;
- default:
- dimensions = 2;
- }
-
- if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
- /* Packing texture image into a PBO.
- * Map the (potentially) VRAM-based buffer into our process space so
- * we can write into it with the code below.
- * A hardware driver might use a sophisticated blit to move the
- * texture data to the PBO if the PBO is in VRAM along with the texture.
- */
- GLubyte *buf = (GLubyte *)
- ctx->Driver.MapBufferRange(ctx, 0, ctx->Pack.BufferObj->Size,
- GL_MAP_WRITE_BIT, ctx->Pack.BufferObj);
- if (!buf) {
- /* out of memory or other unexpected error */
- _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage(map PBO failed)");
- return;
- }
- /* <pixels> was an offset into the PBO.
- * Now make it a real, client-side pointer inside the mapped region.
- */
- pixels = ADD_POINTERS(buf, pixels);
- }
-
- if (get_tex_memcpy(ctx, format, type, pixels, texObj, texImage)) {
- /* all done */
- }
- else if (format == GL_DEPTH_COMPONENT) {
- get_tex_depth(ctx, dimensions, format, type, pixels, texImage);
- }
- else if (format == GL_DEPTH_STENCIL_EXT) {
- get_tex_depth_stencil(ctx, dimensions, format, type, pixels, texImage);
- }
- else if (format == GL_YCBCR_MESA) {
- get_tex_ycbcr(ctx, dimensions, format, type, pixels, texImage);
- }
- else {
- get_tex_rgba(ctx, dimensions, format, type, pixels, texImage);
- }
-
- if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
- ctx->Driver.UnmapBuffer(ctx, 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(struct gl_context *ctx, GLenum target, GLint level,
- GLvoid *img,
- struct gl_texture_object *texObj,
- struct gl_texture_image *texImage)
-{
- const GLuint row_stride = _mesa_format_row_stride(texImage->TexFormat,
- texImage->Width);
- const GLuint row_stride_stored = _mesa_format_row_stride(texImage->TexFormat,
- texImage->RowStride);
- GLuint i;
-
- if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
- /* pack texture image into a PBO */
- GLubyte *buf = (GLubyte *)
- ctx->Driver.MapBufferRange(ctx, 0, ctx->Pack.BufferObj->Size,
- GL_MAP_WRITE_BIT, ctx->Pack.BufferObj);
- if (!buf) {
- /* out of memory or other unexpected error */
- _mesa_error(ctx, GL_OUT_OF_MEMORY,
- "glGetCompresssedTexImage(map PBO failed)");
- return;
- }
- img = ADD_POINTERS(buf, img);
- }
-
- /* no pixelstore or pixel transfer, but respect stride */
-
- if (row_stride == row_stride_stored) {
- const GLuint size = _mesa_format_image_size(texImage->TexFormat,
- texImage->Width,
- texImage->Height,
- texImage->Depth);
- memcpy(img, texImage->Data, size);
- }
- else {
- GLuint bw, bh;
- _mesa_get_format_block_size(texImage->TexFormat, &bw, &bh);
- for (i = 0; i < (texImage->Height + bh - 1) / bh; i++) {
- memcpy((GLubyte *)img + i * row_stride,
- (GLubyte *)texImage->Data + i * row_stride_stored,
- row_stride);
- }
- }
-
- if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
- ctx->Driver.UnmapBuffer(ctx, ctx->Pack.BufferObj);
- }
-}
-
-
-
-/**
- * Do error checking for a glGetTexImage() call.
- * \return GL_TRUE if any error, GL_FALSE if no errors.
- */
-static GLboolean
-getteximage_error_check(struct gl_context *ctx, GLenum target, GLint level,
- GLenum format, GLenum type, GLsizei clientMemSize,
- GLvoid *pixels )
-{
- struct gl_texture_object *texObj;
- struct gl_texture_image *texImage;
- const GLint maxLevels = _mesa_max_texture_levels(ctx, target);
- const GLuint dimensions = (target == GL_TEXTURE_3D) ? 3 : 2;
- GLenum baseFormat;
-
- if (maxLevels == 0) {
- _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(target=0x%x)", target);
- return GL_TRUE;
- }
-
- if (level < 0 || level >= maxLevels) {
- _mesa_error( ctx, GL_INVALID_VALUE, "glGetTexImage(level)" );
- return GL_TRUE;
- }
-
- if (_mesa_sizeof_packed_type(type) <= 0) {
- _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexImage(type)" );
- return GL_TRUE;
- }
-
- if (_mesa_components_in_format(format) <= 0 ||
- format == GL_STENCIL_INDEX ||
- format == GL_COLOR_INDEX) {
- _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexImage(format)" );
- return GL_TRUE;
- }
-
- if (!ctx->Extensions.ARB_depth_texture && _mesa_is_depth_format(format)) {
- _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)");
- return GL_TRUE;
- }
-
- if (!ctx->Extensions.MESA_ycbcr_texture && _mesa_is_ycbcr_format(format)) {
- _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)");
- return GL_TRUE;
- }
-
- if (!ctx->Extensions.EXT_packed_depth_stencil
- && _mesa_is_depthstencil_format(format)) {
- _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)");
- return GL_TRUE;
- }
-
- if (!ctx->Extensions.ATI_envmap_bumpmap
- && _mesa_is_dudv_format(format)) {
- _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)");
- return GL_TRUE;
- }
-
- texObj = _mesa_get_current_tex_object(ctx, target);
-
- if (!texObj || _mesa_is_proxy_texture(target)) {
- _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(target)");
- return GL_TRUE;
- }
-
- texImage = _mesa_select_tex_image(ctx, texObj, target, level);
- if (!texImage) {
- /* out of memory */
- return GL_TRUE;
- }
-
- baseFormat = _mesa_get_format_base_format(texImage->TexFormat);
-
- /* Make sure the requested image format is compatible with the
- * texture's format.
- */
- if (_mesa_is_color_format(format)
- && !_mesa_is_color_format(baseFormat)) {
- _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");
- return GL_TRUE;
- }
- else if (_mesa_is_depth_format(format)
- && !_mesa_is_depth_format(baseFormat)
- && !_mesa_is_depthstencil_format(baseFormat)) {
- _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");
- return GL_TRUE;
- }
- else if (_mesa_is_ycbcr_format(format)
- && !_mesa_is_ycbcr_format(baseFormat)) {
- _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");
- return GL_TRUE;
- }
- else if (_mesa_is_depthstencil_format(format)
- && !_mesa_is_depthstencil_format(baseFormat)) {
- _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");
- return GL_TRUE;
- }
- else if (_mesa_is_dudv_format(format)
- && !_mesa_is_dudv_format(baseFormat)) {
- _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");
- return GL_TRUE;
- }
-
- if (!_mesa_validate_pbo_access(dimensions, &ctx->Pack, texImage->Width,
- texImage->Height, texImage->Depth,
- format, type, clientMemSize, pixels)) {
- if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
- _mesa_error(ctx, GL_INVALID_OPERATION,
- "glGetTexImage(out of bounds PBO access)");
- } else {
- _mesa_error(ctx, GL_INVALID_OPERATION,
- "glGetnTexImageARB(out of bounds access:"
- " bufSize (%d) is too small)", clientMemSize);
- }
- return GL_TRUE;
- }
-
- if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
- /* PBO should not be mapped */
- if (_mesa_bufferobj_mapped(ctx->Pack.BufferObj)) {
- _mesa_error(ctx, GL_INVALID_OPERATION,
- "glGetTexImage(PBO is mapped)");
- return GL_TRUE;
- }
- }
-
- return GL_FALSE;
-}
-
-
-
-/**
- * Get texture image. Called by glGetTexImage.
- *
- * \param target texture target.
- * \param level image level.
- * \param format pixel data format for returned image.
- * \param type pixel data type for returned image.
- * \param bufSize size of the pixels data buffer.
- * \param pixels returned pixel data.
- */
-void GLAPIENTRY
-_mesa_GetnTexImageARB( GLenum target, GLint level, GLenum format,
- GLenum type, GLsizei bufSize, GLvoid *pixels )
-{
- struct gl_texture_object *texObj;
- struct gl_texture_image *texImage;
- GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
-
- if (getteximage_error_check(ctx, target, level, format, type,
- bufSize, pixels)) {
- return;
- }
-
- if (!_mesa_is_bufferobj(ctx->Pack.BufferObj) && !pixels) {
- /* not an error, do nothing */
- return;
- }
-
- texObj = _mesa_get_current_tex_object(ctx, target);
- texImage = _mesa_select_tex_image(ctx, texObj, target, level);
-
- if (MESA_VERBOSE & (VERBOSE_API | VERBOSE_TEXTURE)) {
- _mesa_debug(ctx, "glGetTexImage(tex %u) format = %s, w=%d, h=%d,"
- " dstFmt=0x%x, dstType=0x%x\n",
- texObj->Name,
- _mesa_get_format_name(texImage->TexFormat),
- texImage->Width, texImage->Height,
- format, type);
- }
-
- _mesa_lock_texture(ctx, texObj);
- {
- ctx->Driver.GetTexImage(ctx, target, level, format, type, pixels,
- texObj, texImage);
- }
- _mesa_unlock_texture(ctx, texObj);
-}
-
-
-void GLAPIENTRY
-_mesa_GetTexImage( GLenum target, GLint level, GLenum format,
- GLenum type, GLvoid *pixels )
-{
- _mesa_GetnTexImageARB(target, level, format, type, INT_MAX, pixels);
-}
-
-
-/**
- * Do error checking for a glGetCompressedTexImage() call.
- * \return GL_TRUE if any error, GL_FALSE if no errors.
- */
-static GLboolean
-getcompressedteximage_error_check(struct gl_context *ctx, GLenum target,
- GLint level, GLsizei clientMemSize, GLvoid *img)
-{
- struct gl_texture_object *texObj;
- struct gl_texture_image *texImage;
- const GLint maxLevels = _mesa_max_texture_levels(ctx, target);
- GLuint compressedSize;
-
- if (maxLevels == 0) {
- _mesa_error(ctx, GL_INVALID_ENUM, "glGetCompressedTexImage(target=0x%x)",
- target);
- return GL_TRUE;
- }
-
- if (level < 0 || level >= maxLevels) {
- _mesa_error(ctx, GL_INVALID_VALUE,
- "glGetCompressedTexImageARB(bad level = %d)", level);
- return GL_TRUE;
- }
-
- if (_mesa_is_proxy_texture(target)) {
- _mesa_error(ctx, GL_INVALID_ENUM,
- "glGetCompressedTexImageARB(bad target = %s)",
- _mesa_lookup_enum_by_nr(target));
- return GL_TRUE;
- }
-
- texObj = _mesa_get_current_tex_object(ctx, target);
- if (!texObj) {
- _mesa_error(ctx, GL_INVALID_ENUM, "glGetCompressedTexImageARB(target)");
- return GL_TRUE;
- }
-
- texImage = _mesa_select_tex_image(ctx, texObj, target, level);
-
- if (!texImage) {
- /* probably invalid mipmap level */
- _mesa_error(ctx, GL_INVALID_VALUE,
- "glGetCompressedTexImageARB(level)");
- return GL_TRUE;
- }
-
- if (!_mesa_is_format_compressed(texImage->TexFormat)) {
- _mesa_error(ctx, GL_INVALID_OPERATION,
- "glGetCompressedTexImageARB(texture is not compressed)");
- return GL_TRUE;
- }
-
- compressedSize = _mesa_format_image_size(texImage->TexFormat,
- texImage->Width,
- texImage->Height,
- texImage->Depth);
-
- if (!_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
- /* do bounds checking on writing to client memory */
- if (clientMemSize < compressedSize) {
- _mesa_error(ctx, GL_INVALID_OPERATION,
- "glGetnCompressedTexImageARB(out of bounds access:"
- " bufSize (%d) is too small)", clientMemSize);
- }
- } else {
- /* do bounds checking on PBO write */
- if ((const GLubyte *) img + compressedSize >
- (const GLubyte *) ctx->Pack.BufferObj->Size) {
- _mesa_error(ctx, GL_INVALID_OPERATION,
- "glGetCompressedTexImage(out of bounds PBO access)");
- return GL_TRUE;
- }
-
- /* make sure PBO is not mapped */
- if (_mesa_bufferobj_mapped(ctx->Pack.BufferObj)) {
- _mesa_error(ctx, GL_INVALID_OPERATION,
- "glGetCompressedTexImage(PBO is mapped)");
- return GL_TRUE;
- }
- }
-
- return GL_FALSE;
-}
-
-
-void GLAPIENTRY
-_mesa_GetnCompressedTexImageARB(GLenum target, GLint level, GLsizei bufSize,
- GLvoid *img)
-{
- struct gl_texture_object *texObj;
- struct gl_texture_image *texImage;
- GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
-
- if (getcompressedteximage_error_check(ctx, target, level, bufSize, img)) {
- return;
- }
-
- if (_mesa_is_bufferobj(ctx->Pack.BufferObj) && !img) {
- /* not an error, do nothing */
- return;
- }
-
- texObj = _mesa_get_current_tex_object(ctx, target);
- texImage = _mesa_select_tex_image(ctx, texObj, target, level);
-
- if (MESA_VERBOSE & (VERBOSE_API | VERBOSE_TEXTURE)) {
- _mesa_debug(ctx,
- "glGetCompressedTexImage(tex %u) format = %s, w=%d, h=%d\n",
- texObj->Name,
- _mesa_get_format_name(texImage->TexFormat),
- texImage->Width, texImage->Height);
- }
-
- _mesa_lock_texture(ctx, texObj);
- {
- ctx->Driver.GetCompressedTexImage(ctx, target, level, img,
- texObj, texImage);
- }
- _mesa_unlock_texture(ctx, texObj);
-}
-
-void GLAPIENTRY
-_mesa_GetCompressedTexImageARB(GLenum target, GLint level, GLvoid *img)
-{
- _mesa_GetnCompressedTexImageARB(target, level, INT_MAX, img);
-}
+/* + * Mesa 3-D graphics library + * Version: 7.7 + * + * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. + * Copyright (c) 2009 VMware, Inc. + * + * 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. + */ + + +/** + * Code for glGetTexImage() and glGetCompressedTexImage(). + */ + + +#include "glheader.h" +#include "bufferobj.h" +#include "enums.h" +#include "context.h" +#include "formats.h" +#include "format_unpack.h" +#include "image.h" +#include "mfeatures.h" +#include "mtypes.h" +#include "pack.h" +#include "pbo.h" +#include "texcompress.h" +#include "texgetimage.h" +#include "teximage.h" + + + +/** + * Can the given type represent negative values? + */ +static INLINE GLboolean +type_with_negative_values(GLenum type) +{ + switch (type) { + case GL_BYTE: + case GL_SHORT: + case GL_INT: + case GL_FLOAT: + case GL_HALF_FLOAT_ARB: + return GL_TRUE; + default: + return GL_FALSE; + } +} + + +/** + * glGetTexImage for depth/Z pixels. + */ +static void +get_tex_depth(struct gl_context *ctx, GLuint dimensions, + GLenum format, GLenum type, GLvoid *pixels, + const struct gl_texture_image *texImage) +{ + const GLint width = texImage->Width; + const GLint height = texImage->Height; + const GLint depth = texImage->Depth; + GLint img, row; + GLfloat *depthRow = (GLfloat *) malloc(width * sizeof(GLfloat)); + const GLint texelSize = _mesa_get_format_bytes(texImage->TexFormat); + + if (!depthRow) { + _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage"); + return; + } + + for (img = 0; img < depth; img++) { + for (row = 0; row < height; row++) { + void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels, + width, height, format, type, + img, row, 0); + const GLubyte *src = (GLubyte *) texImage->Data + + (texImage->ImageOffsets[img] + + texImage->RowStride * row) * texelSize; + + _mesa_unpack_float_z_row(texImage->TexFormat, width, src, depthRow); + + _mesa_pack_depth_span(ctx, width, dest, type, depthRow, &ctx->Pack); + } + } + + free(depthRow); +} + + +/** + * glGetTexImage for depth/stencil pixels. + */ +static void +get_tex_depth_stencil(struct gl_context *ctx, GLuint dimensions, + GLenum format, GLenum type, GLvoid *pixels, + const struct gl_texture_image *texImage) +{ + const GLint width = texImage->Width; + const GLint height = texImage->Height; + const GLint depth = texImage->Depth; + const GLint rowstride = texImage->RowStride; + const GLuint *src = (const GLuint *) texImage->Data; + GLint img, row; + + for (img = 0; img < depth; img++) { + for (row = 0; row < height; row++) { + void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels, + width, height, format, type, + img, row, 0); + memcpy(dest, src, width * sizeof(GLuint)); + if (ctx->Pack.SwapBytes) { + _mesa_swap4((GLuint *) dest, width); + } + + src += rowstride; + } + } +} + + +/** + * glGetTexImage for YCbCr pixels. + */ +static void +get_tex_ycbcr(struct gl_context *ctx, GLuint dimensions, + GLenum format, GLenum type, GLvoid *pixels, + const struct gl_texture_image *texImage) +{ + const GLint width = texImage->Width; + const GLint height = texImage->Height; + const GLint depth = texImage->Depth; + const GLint rowstride = texImage->RowStride; + const GLushort *src = (const GLushort *) texImage->Data; + GLint img, row; + + for (img = 0; img < depth; img++) { + for (row = 0; row < height; row++) { + void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels, + width, height, format, type, + img, row, 0); + memcpy(dest, src, width * sizeof(GLushort)); + + /* check for byte swapping */ + if ((texImage->TexFormat == MESA_FORMAT_YCBCR + && type == GL_UNSIGNED_SHORT_8_8_REV_MESA) || + (texImage->TexFormat == 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); + } + + src += rowstride; + } + } +} + + +/** + * glGetTexImage for color formats (RGBA, RGB, alpha, LA, etc). + * Compressed textures are handled here as well. + */ +static void +get_tex_rgba(struct gl_context *ctx, GLuint dimensions, + GLenum format, GLenum type, GLvoid *pixels, + struct gl_texture_image *texImage) +{ + /* don't want to apply sRGB -> RGB conversion here so override the format */ + const gl_format texFormat = _mesa_get_srgb_format_linear(texImage->TexFormat); + const GLuint width = texImage->Width; + const GLuint height = texImage->Height; + const GLuint depth = texImage->Depth; + const GLenum dataType = _mesa_get_format_datatype(texFormat); + const GLenum baseFormat = _mesa_get_format_base_format(texFormat); + /* Normally, no pixel transfer ops are performed during glGetTexImage. + * The only possible exception is component clamping to [0,1]. + */ + GLbitfield transferOps = 0x0; + + /* In general, clamping does not apply to glGetTexImage, except when + * the returned type of the image can't hold negative values. + */ + if (!type_with_negative_values(type)) { + /* the returned image type can't have negative values */ + if (dataType == GL_FLOAT || + dataType == GL_SIGNED_NORMALIZED || + format == GL_LUMINANCE || + format == GL_LUMINANCE_ALPHA) { + transferOps |= IMAGE_CLAMP_BIT; + } + } + + if (_mesa_is_format_compressed(texFormat)) { + /* Decompress into temp buffer, then pack into user buffer */ + GLfloat *tempImage, *srcRow; + GLuint row; + + tempImage = (GLfloat *) malloc(texImage->Width * texImage->Height * + texImage->Depth * 4 * sizeof(GLfloat)); + if (!tempImage) { + _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage()"); + return; + } + + _mesa_decompress_image(texFormat, texImage->Width, texImage->Height, + texImage->Data, texImage->RowStride, tempImage); + + if (baseFormat == GL_LUMINANCE || + baseFormat == GL_LUMINANCE_ALPHA) { + /* Set green and blue to zero since the pack function here will + * compute L=R+G+B. + */ + GLuint i; + for (i = 0; i < width * height; i++) { + tempImage[i * 4 + GCOMP] = tempImage[i * 4 + BCOMP] = 0.0f; + } + } + + srcRow = tempImage; + for (row = 0; row < height; row++) { + void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels, + width, height, format, type, + 0, row, 0); + + _mesa_pack_rgba_span_float(ctx, width, (GLfloat (*)[4]) srcRow, + format, type, dest, &ctx->Pack, transferOps); + srcRow += width * 4; + } + + free(tempImage); + } + else { + /* No decompression needed */ + const GLint texelSize = _mesa_get_format_bytes(texFormat); + GLuint img, row; + GLfloat (*rgba)[4]; + + rgba = (GLfloat (*)[4]) malloc(4 * width * sizeof(GLfloat)); + if (!rgba) { + _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage()"); + return; + } + + for (img = 0; img < depth; img++) { + for (row = 0; row < height; row++) { + void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels, + width, height, format, type, + img, row, 0); + const GLubyte *src = (const GLubyte *) texImage->Data + + (texImage->ImageOffsets[img] + + texImage->RowStride * row) * texelSize; + + _mesa_unpack_rgba_row(texFormat, width, src, rgba); + + if (texImage->_BaseFormat == GL_ALPHA) { + GLint col; + for (col = 0; col < width; col++) { + rgba[col][RCOMP] = 0.0F; + rgba[col][GCOMP] = 0.0F; + rgba[col][BCOMP] = 0.0F; + } + } + else if (texImage->_BaseFormat == GL_LUMINANCE) { + GLint col; + for (col = 0; col < width; col++) { + rgba[col][GCOMP] = 0.0F; + rgba[col][BCOMP] = 0.0F; + rgba[col][ACOMP] = 1.0F; + } + } + else if (texImage->_BaseFormat == GL_LUMINANCE_ALPHA) { + GLint col; + for (col = 0; col < width; col++) { + rgba[col][GCOMP] = 0.0F; + rgba[col][BCOMP] = 0.0F; + } + } + else if (texImage->_BaseFormat == GL_INTENSITY) { + GLint col; + for (col = 0; col < width; col++) { + rgba[col][GCOMP] = 0.0F; + rgba[col][BCOMP] = 0.0F; + rgba[col][ACOMP] = 1.0F; + } + } + + _mesa_pack_rgba_span_float(ctx, width, (GLfloat (*)[4]) rgba, + format, type, dest, + &ctx->Pack, transferOps); + } + } + + free(rgba); + } +} + + +/** + * Try to do glGetTexImage() with simple memcpy(). + * \return GL_TRUE if done, GL_FALSE otherwise + */ +static GLboolean +get_tex_memcpy(struct gl_context *ctx, GLenum format, GLenum type, GLvoid *pixels, + const struct gl_texture_object *texObj, + const struct gl_texture_image *texImage) +{ + GLboolean memCopy = GL_FALSE; + + /* Texture image should have been mapped already */ + assert(texImage->Data); + + /* + * Check if the src/dst formats are compatible. + * Also note that GL's pixel transfer ops don't apply to glGetTexImage() + * so we don't have to worry about those. + * XXX more format combinations could be supported here. + */ + if ((texObj->Target == GL_TEXTURE_1D || + texObj->Target == GL_TEXTURE_2D || + texObj->Target == GL_TEXTURE_RECTANGLE || + (texObj->Target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X && + texObj->Target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z))) { + if ((texImage->TexFormat == MESA_FORMAT_ARGB8888 || + texImage->TexFormat == MESA_FORMAT_SARGB8) && + format == GL_BGRA && + (type == GL_UNSIGNED_BYTE || type == GL_UNSIGNED_INT_8_8_8_8_REV) && + !ctx->Pack.SwapBytes && + _mesa_little_endian()) { + memCopy = GL_TRUE; + } + else if ((texImage->TexFormat == MESA_FORMAT_AL88 || + texImage->TexFormat == MESA_FORMAT_SLA8) && + format == GL_LUMINANCE_ALPHA && + type == GL_UNSIGNED_BYTE && + !ctx->Pack.SwapBytes && + _mesa_little_endian()) { + memCopy = GL_TRUE; + } + else if ((texImage->TexFormat == MESA_FORMAT_L8 || + texImage->TexFormat == MESA_FORMAT_SL8) && + format == GL_LUMINANCE && + type == GL_UNSIGNED_BYTE) { + memCopy = GL_TRUE; + } + else if (texImage->TexFormat == MESA_FORMAT_L16 && + format == GL_LUMINANCE && + type == GL_UNSIGNED_SHORT) { + memCopy = GL_TRUE; + } + else if (texImage->TexFormat == MESA_FORMAT_A8 && + format == GL_ALPHA && + type == GL_UNSIGNED_BYTE) { + memCopy = GL_TRUE; + } + else if (texImage->TexFormat == MESA_FORMAT_A16 && + format == GL_ALPHA && + type == GL_UNSIGNED_SHORT) { + memCopy = GL_TRUE; + } + } + + if (memCopy) { + const GLuint bpp = _mesa_get_format_bytes(texImage->TexFormat); + const GLuint bytesPerRow = texImage->Width * bpp; + GLubyte *dst = + _mesa_image_address2d(&ctx->Pack, pixels, texImage->Width, + texImage->Height, format, type, 0, 0); + const GLint dstRowStride = + _mesa_image_row_stride(&ctx->Pack, texImage->Width, format, type); + const GLubyte *src = texImage->Data; + const GLint srcRowStride = texImage->RowStride * bpp; + GLuint row; + + if (bytesPerRow == dstRowStride && bytesPerRow == srcRowStride) { + memcpy(dst, src, bytesPerRow * texImage->Height); + } + else { + for (row = 0; row < texImage->Height; row++) { + memcpy(dst, src, bytesPerRow); + dst += dstRowStride; + src += srcRowStride; + } + } + } + + return memCopy; +} + + +/** + * This is the software fallback for Driver.GetTexImage(). + * All error checking will have been done before this routine is called. + * The texture image must be mapped. + */ +void +_mesa_get_teximage(struct gl_context *ctx, GLenum target, GLint level, + GLenum format, GLenum type, GLvoid *pixels, + struct gl_texture_object *texObj, + struct gl_texture_image *texImage) +{ + GLuint dimensions; + + /* If we get here, the texture image should be mapped */ + assert(texImage->Data); + + switch (target) { + case GL_TEXTURE_1D: + dimensions = 1; + break; + case GL_TEXTURE_3D: + dimensions = 3; + break; + default: + dimensions = 2; + } + + if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) { + /* Packing texture image into a PBO. + * Map the (potentially) VRAM-based buffer into our process space so + * we can write into it with the code below. + * A hardware driver might use a sophisticated blit to move the + * texture data to the PBO if the PBO is in VRAM along with the texture. + */ + GLubyte *buf = (GLubyte *) + ctx->Driver.MapBufferRange(ctx, 0, ctx->Pack.BufferObj->Size, + GL_MAP_WRITE_BIT, ctx->Pack.BufferObj); + if (!buf) { + /* out of memory or other unexpected error */ + _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage(map PBO failed)"); + return; + } + /* <pixels> was an offset into the PBO. + * Now make it a real, client-side pointer inside the mapped region. + */ + pixels = ADD_POINTERS(buf, pixels); + } + + if (get_tex_memcpy(ctx, format, type, pixels, texObj, texImage)) { + /* all done */ + } + else if (format == GL_DEPTH_COMPONENT) { + get_tex_depth(ctx, dimensions, format, type, pixels, texImage); + } + else if (format == GL_DEPTH_STENCIL_EXT) { + get_tex_depth_stencil(ctx, dimensions, format, type, pixels, texImage); + } + else if (format == GL_YCBCR_MESA) { + get_tex_ycbcr(ctx, dimensions, format, type, pixels, texImage); + } + else { + get_tex_rgba(ctx, dimensions, format, type, pixels, texImage); + } + + if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) { + ctx->Driver.UnmapBuffer(ctx, 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(struct gl_context *ctx, GLenum target, GLint level, + GLvoid *img, + struct gl_texture_object *texObj, + struct gl_texture_image *texImage) +{ + const GLuint row_stride = _mesa_format_row_stride(texImage->TexFormat, + texImage->Width); + const GLuint row_stride_stored = _mesa_format_row_stride(texImage->TexFormat, + texImage->RowStride); + GLuint i; + + if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) { + /* pack texture image into a PBO */ + GLubyte *buf = (GLubyte *) + ctx->Driver.MapBufferRange(ctx, 0, ctx->Pack.BufferObj->Size, + GL_MAP_WRITE_BIT, ctx->Pack.BufferObj); + if (!buf) { + /* out of memory or other unexpected error */ + _mesa_error(ctx, GL_OUT_OF_MEMORY, + "glGetCompresssedTexImage(map PBO failed)"); + return; + } + img = ADD_POINTERS(buf, img); + } + + /* no pixelstore or pixel transfer, but respect stride */ + + if (row_stride == row_stride_stored) { + const GLuint size = _mesa_format_image_size(texImage->TexFormat, + texImage->Width, + texImage->Height, + texImage->Depth); + memcpy(img, texImage->Data, size); + } + else { + GLuint bw, bh; + _mesa_get_format_block_size(texImage->TexFormat, &bw, &bh); + for (i = 0; i < (texImage->Height + bh - 1) / bh; i++) { + memcpy((GLubyte *)img + i * row_stride, + (GLubyte *)texImage->Data + i * row_stride_stored, + row_stride); + } + } + + if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) { + ctx->Driver.UnmapBuffer(ctx, ctx->Pack.BufferObj); + } +} + + + +/** + * Do error checking for a glGetTexImage() call. + * \return GL_TRUE if any error, GL_FALSE if no errors. + */ +static GLboolean +getteximage_error_check(struct gl_context *ctx, GLenum target, GLint level, + GLenum format, GLenum type, GLsizei clientMemSize, + GLvoid *pixels ) +{ + struct gl_texture_object *texObj; + struct gl_texture_image *texImage; + const GLint maxLevels = _mesa_max_texture_levels(ctx, target); + const GLuint dimensions = (target == GL_TEXTURE_3D) ? 3 : 2; + GLenum baseFormat; + + if (maxLevels == 0) { + _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(target=0x%x)", target); + return GL_TRUE; + } + + if (level < 0 || level >= maxLevels) { + _mesa_error( ctx, GL_INVALID_VALUE, "glGetTexImage(level)" ); + return GL_TRUE; + } + + if (_mesa_sizeof_packed_type(type) <= 0) { + _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexImage(type)" ); + return GL_TRUE; + } + + if (_mesa_components_in_format(format) <= 0 || + format == GL_STENCIL_INDEX || + format == GL_COLOR_INDEX) { + _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexImage(format)" ); + return GL_TRUE; + } + + if (!ctx->Extensions.ARB_depth_texture && _mesa_is_depth_format(format)) { + _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)"); + return GL_TRUE; + } + + if (!ctx->Extensions.MESA_ycbcr_texture && _mesa_is_ycbcr_format(format)) { + _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)"); + return GL_TRUE; + } + + if (!ctx->Extensions.EXT_packed_depth_stencil + && _mesa_is_depthstencil_format(format)) { + _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)"); + return GL_TRUE; + } + + if (!ctx->Extensions.ATI_envmap_bumpmap + && _mesa_is_dudv_format(format)) { + _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)"); + return GL_TRUE; + } + + texObj = _mesa_get_current_tex_object(ctx, target); + + if (!texObj || _mesa_is_proxy_texture(target)) { + _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(target)"); + return GL_TRUE; + } + + texImage = _mesa_select_tex_image(ctx, texObj, target, level); + if (!texImage) { + /* out of memory */ + return GL_TRUE; + } + + baseFormat = _mesa_get_format_base_format(texImage->TexFormat); + + /* Make sure the requested image format is compatible with the + * texture's format. + */ + if (_mesa_is_color_format(format) + && !_mesa_is_color_format(baseFormat)) { + _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)"); + return GL_TRUE; + } + else if (_mesa_is_depth_format(format) + && !_mesa_is_depth_format(baseFormat) + && !_mesa_is_depthstencil_format(baseFormat)) { + _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)"); + return GL_TRUE; + } + else if (_mesa_is_ycbcr_format(format) + && !_mesa_is_ycbcr_format(baseFormat)) { + _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)"); + return GL_TRUE; + } + else if (_mesa_is_depthstencil_format(format) + && !_mesa_is_depthstencil_format(baseFormat)) { + _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)"); + return GL_TRUE; + } + else if (_mesa_is_dudv_format(format) + && !_mesa_is_dudv_format(baseFormat)) { + _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)"); + return GL_TRUE; + } + + if (!_mesa_validate_pbo_access(dimensions, &ctx->Pack, texImage->Width, + texImage->Height, texImage->Depth, + format, type, clientMemSize, pixels)) { + if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "glGetTexImage(out of bounds PBO access)"); + } else { + _mesa_error(ctx, GL_INVALID_OPERATION, + "glGetnTexImageARB(out of bounds access:" + " bufSize (%d) is too small)", clientMemSize); + } + return GL_TRUE; + } + + if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) { + /* PBO should not be mapped */ + if (_mesa_bufferobj_mapped(ctx->Pack.BufferObj)) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "glGetTexImage(PBO is mapped)"); + return GL_TRUE; + } + } + + return GL_FALSE; +} + + + +/** + * Get texture image. Called by glGetTexImage. + * + * \param target texture target. + * \param level image level. + * \param format pixel data format for returned image. + * \param type pixel data type for returned image. + * \param bufSize size of the pixels data buffer. + * \param pixels returned pixel data. + */ +void GLAPIENTRY +_mesa_GetnTexImageARB( GLenum target, GLint level, GLenum format, + GLenum type, GLsizei bufSize, GLvoid *pixels ) +{ + struct gl_texture_object *texObj; + struct gl_texture_image *texImage; + GET_CURRENT_CONTEXT(ctx); + ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); + + if (getteximage_error_check(ctx, target, level, format, type, + bufSize, pixels)) { + return; + } + + if (!_mesa_is_bufferobj(ctx->Pack.BufferObj) && !pixels) { + /* not an error, do nothing */ + return; + } + + texObj = _mesa_get_current_tex_object(ctx, target); + texImage = _mesa_select_tex_image(ctx, texObj, target, level); + + if (MESA_VERBOSE & (VERBOSE_API | VERBOSE_TEXTURE)) { + _mesa_debug(ctx, "glGetTexImage(tex %u) format = %s, w=%d, h=%d," + " dstFmt=0x%x, dstType=0x%x\n", + texObj->Name, + _mesa_get_format_name(texImage->TexFormat), + texImage->Width, texImage->Height, + format, type); + } + + _mesa_lock_texture(ctx, texObj); + { + ctx->Driver.GetTexImage(ctx, target, level, format, type, pixels, + texObj, texImage); + } + _mesa_unlock_texture(ctx, texObj); +} + + +void GLAPIENTRY +_mesa_GetTexImage( GLenum target, GLint level, GLenum format, + GLenum type, GLvoid *pixels ) +{ + _mesa_GetnTexImageARB(target, level, format, type, INT_MAX, pixels); +} + + +/** + * Do error checking for a glGetCompressedTexImage() call. + * \return GL_TRUE if any error, GL_FALSE if no errors. + */ +static GLboolean +getcompressedteximage_error_check(struct gl_context *ctx, GLenum target, + GLint level, GLsizei clientMemSize, GLvoid *img) +{ + struct gl_texture_object *texObj; + struct gl_texture_image *texImage; + const GLint maxLevels = _mesa_max_texture_levels(ctx, target); + GLuint compressedSize; + + if (maxLevels == 0) { + _mesa_error(ctx, GL_INVALID_ENUM, "glGetCompressedTexImage(target=0x%x)", + target); + return GL_TRUE; + } + + if (level < 0 || level >= maxLevels) { + _mesa_error(ctx, GL_INVALID_VALUE, + "glGetCompressedTexImageARB(bad level = %d)", level); + return GL_TRUE; + } + + if (_mesa_is_proxy_texture(target)) { + _mesa_error(ctx, GL_INVALID_ENUM, + "glGetCompressedTexImageARB(bad target = %s)", + _mesa_lookup_enum_by_nr(target)); + return GL_TRUE; + } + + texObj = _mesa_get_current_tex_object(ctx, target); + if (!texObj) { + _mesa_error(ctx, GL_INVALID_ENUM, "glGetCompressedTexImageARB(target)"); + return GL_TRUE; + } + + texImage = _mesa_select_tex_image(ctx, texObj, target, level); + + if (!texImage) { + /* probably invalid mipmap level */ + _mesa_error(ctx, GL_INVALID_VALUE, + "glGetCompressedTexImageARB(level)"); + return GL_TRUE; + } + + if (!_mesa_is_format_compressed(texImage->TexFormat)) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "glGetCompressedTexImageARB(texture is not compressed)"); + return GL_TRUE; + } + + compressedSize = _mesa_format_image_size(texImage->TexFormat, + texImage->Width, + texImage->Height, + texImage->Depth); + + if (!_mesa_is_bufferobj(ctx->Pack.BufferObj)) { + /* do bounds checking on writing to client memory */ + if (clientMemSize < compressedSize) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "glGetnCompressedTexImageARB(out of bounds access:" + " bufSize (%d) is too small)", clientMemSize); + } + } else { + /* do bounds checking on PBO write */ + if ((const GLubyte *) img + compressedSize > + (const GLubyte *) ctx->Pack.BufferObj->Size) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "glGetCompressedTexImage(out of bounds PBO access)"); + return GL_TRUE; + } + + /* make sure PBO is not mapped */ + if (_mesa_bufferobj_mapped(ctx->Pack.BufferObj)) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "glGetCompressedTexImage(PBO is mapped)"); + return GL_TRUE; + } + } + + return GL_FALSE; +} + + +void GLAPIENTRY +_mesa_GetnCompressedTexImageARB(GLenum target, GLint level, GLsizei bufSize, + GLvoid *img) +{ + struct gl_texture_object *texObj; + struct gl_texture_image *texImage; + GET_CURRENT_CONTEXT(ctx); + ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); + + if (getcompressedteximage_error_check(ctx, target, level, bufSize, img)) { + return; + } + + if (_mesa_is_bufferobj(ctx->Pack.BufferObj) && !img) { + /* not an error, do nothing */ + return; + } + + texObj = _mesa_get_current_tex_object(ctx, target); + texImage = _mesa_select_tex_image(ctx, texObj, target, level); + + if (MESA_VERBOSE & (VERBOSE_API | VERBOSE_TEXTURE)) { + _mesa_debug(ctx, + "glGetCompressedTexImage(tex %u) format = %s, w=%d, h=%d\n", + texObj->Name, + _mesa_get_format_name(texImage->TexFormat), + texImage->Width, texImage->Height); + } + + _mesa_lock_texture(ctx, texObj); + { + ctx->Driver.GetCompressedTexImage(ctx, target, level, img, + texObj, texImage); + } + _mesa_unlock_texture(ctx, texObj); +} + +void GLAPIENTRY +_mesa_GetCompressedTexImageARB(GLenum target, GLint level, GLvoid *img) +{ + _mesa_GetnCompressedTexImageARB(target, level, INT_MAX, img); +} |