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mesa/src/mesa/main/texgetimage.c
Erik Faye-Lund ddbb14dc9d mesa/main: remove VERBOSE_API 
This feature has been left to bitrot for a long time, and no longer
works consistently. Here's a few examples of things I found:

- Lots of newer GL commands never implement these
- It's very inconsistent what level of details about the command is
  logged: some print arguments, some print details about arguments, some
  print return-values, some print the function name, some print a
  slightly incorrect function name.
- Interactions with GL_KHR_no_error is entirely random; some no-error
  functions report, and some does not.

Realistically, this mechanism hasn't worked for a long time, and nobody
seems to care. If a user wants to trace what OpenGL calls are done, we
have tools like apitrace that are better suited for this purpose anyway.

Let's just rip it out. Since VERBOSE_TEXTURE is just a subset of
VERBOSE_API, rip that out as well.

Reviewed-by: Christian Gmeiner <cgmeiner@igalia.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Eric R. Smith <eric.smith@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/41129>
2026-05-12 09:26:58 +00:00

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/*
* Mesa 3-D graphics library
*
* 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
* THE AUTHORS OR COPYRIGHT HOLDERS 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 "util/glheader.h"
#include "bufferobj.h"
#include "enums.h"
#include "context.h"
#include "formats.h"
#include "format_unpack.h"
#include "glformats.h"
#include "image.h"
#include "mtypes.h"
#include "pack.h"
#include "pbo.h"
#include "pixelstore.h"
#include "texcompress.h"
#include "texgetimage.h"
#include "teximage.h"
#include "texobj.h"
#include "texstore.h"
#include "format_utils.h"
#include "pixeltransfer.h"
#include "api_exec_decl.h"
#include "state_tracker/st_cb_texture.h"
/**
* Can the given type represent negative values?
*/
static inline GLboolean
type_needs_clamping(GLenum type)
{
switch (type) {
case GL_BYTE:
case GL_SHORT:
case GL_INT:
case GL_FLOAT:
case GL_HALF_FLOAT_ARB:
case GL_UNSIGNED_INT_10F_11F_11F_REV:
case GL_UNSIGNED_INT_5_9_9_9_REV:
return GL_FALSE;
default:
return GL_TRUE;
}
}
/**
* glGetTexImage for depth/Z pixels.
*/
static void
get_tex_depth(struct gl_context *ctx, GLuint dimensions,
GLint xoffset, GLint yoffset, GLint zoffset,
GLsizei width, GLsizei height, GLint depth,
GLenum format, GLenum type, GLvoid *pixels,
struct gl_texture_image *texImage)
{
GLint img, row;
GLfloat *depthRow = malloc(width * sizeof(GLfloat));
if (!depthRow) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage");
return;
}
for (img = 0; img < depth; img++) {
GLubyte *srcMap;
GLint srcRowStride;
/* map src texture buffer */
st_MapTextureImage(ctx, texImage, zoffset + img,
xoffset, yoffset, width, height,
GL_MAP_READ_BIT, &srcMap, &srcRowStride);
if (srcMap) {
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 = srcMap + row * srcRowStride;
_mesa_unpack_float_z_row(texImage->TexFormat, width, src, depthRow);
_mesa_pack_depth_span(ctx, width, dest, type, depthRow, &ctx->Pack);
}
st_UnmapTextureImage(ctx, texImage, zoffset + img);
}
else {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage");
break;
}
}
free(depthRow);
}
/**
* glGetTexImage for depth/stencil pixels.
*/
static void
get_tex_depth_stencil(struct gl_context *ctx, GLuint dimensions,
GLint xoffset, GLint yoffset, GLint zoffset,
GLsizei width, GLsizei height, GLint depth,
GLenum format, GLenum type, GLvoid *pixels,
struct gl_texture_image *texImage)
{
GLint img, row;
assert(format == GL_DEPTH_STENCIL);
for (img = 0; img < depth; img++) {
GLubyte *srcMap;
GLint rowstride;
/* map src texture buffer */
st_MapTextureImage(ctx, texImage, zoffset + img,
xoffset, yoffset, width, height,
GL_MAP_READ_BIT, &srcMap, &rowstride);
if (srcMap) {
for (row = 0; row < height; row++) {
const GLubyte *src = srcMap + row * rowstride;
void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels,
width, height, format, type,
img, row, 0);
switch (type) {
case GL_UNSIGNED_INT_24_8:
_mesa_unpack_uint_24_8_depth_stencil_row(texImage->TexFormat,
width, src, dest);
break;
case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
_mesa_unpack_float_32_uint_24_8_depth_stencil_row(texImage->TexFormat,
width,
src, dest);
break;
default:
UNREACHABLE("bad type in get_tex_depth_stencil()");
}
if (ctx->Pack.SwapBytes) {
_mesa_swap4((GLuint *) dest, width);
}
}
st_UnmapTextureImage(ctx, texImage, zoffset + img);
}
else {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage");
break;
}
}
}
/**
* glGetTexImage for stencil pixels.
*/
static void
get_tex_stencil(struct gl_context *ctx, GLuint dimensions,
GLint xoffset, GLint yoffset, GLint zoffset,
GLsizei width, GLsizei height, GLint depth,
GLenum format, GLenum type, GLvoid *pixels,
struct gl_texture_image *texImage)
{
GLint img, row;
assert(format == GL_STENCIL_INDEX);
for (img = 0; img < depth; img++) {
GLubyte *srcMap;
GLint rowstride;
/* map src texture buffer */
st_MapTextureImage(ctx, texImage, zoffset + img,
xoffset, yoffset, width, height,
GL_MAP_READ_BIT,
&srcMap, &rowstride);
if (srcMap) {
for (row = 0; row < height; row++) {
const GLubyte *src = srcMap + row * rowstride;
void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels,
width, height, format, type,
img, row, 0);
_mesa_unpack_ubyte_stencil_row(texImage->TexFormat,
width,
(const GLuint *) src,
dest);
}
st_UnmapTextureImage(ctx, texImage, zoffset + img);
}
else {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage");
break;
}
}
}
/**
* glGetTexImage for YCbCr pixels.
*/
static void
get_tex_ycbcr(struct gl_context *ctx, GLuint dimensions,
GLint xoffset, GLint yoffset, GLint zoffset,
GLsizei width, GLsizei height, GLint depth,
GLenum format, GLenum type, GLvoid *pixels,
struct gl_texture_image *texImage)
{
GLint img, row;
for (img = 0; img < depth; img++) {
GLubyte *srcMap;
GLint rowstride;
/* map src texture buffer */
st_MapTextureImage(ctx, texImage, zoffset + img,
xoffset, yoffset, width, height,
GL_MAP_READ_BIT, &srcMap, &rowstride);
if (srcMap) {
for (row = 0; row < height; row++) {
const GLubyte *src = srcMap + row * rowstride;
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);
}
}
st_UnmapTextureImage(ctx, texImage, zoffset + img);
}
else {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage");
break;
}
}
}
/**
* Depending on the base format involved we may need to apply a rebase
* transform (for example: if we download to a Luminance format we want
* G=0 and B=0).
*/
static bool
teximage_needs_rebase(mesa_format texFormat, GLenum baseFormat,
bool is_compressed, uint8_t *rebaseSwizzle)
{
bool needsRebase = false;
if (baseFormat == GL_LUMINANCE ||
baseFormat == GL_INTENSITY) {
needsRebase = true;
rebaseSwizzle[0] = MESA_FORMAT_SWIZZLE_X;
rebaseSwizzle[1] = MESA_FORMAT_SWIZZLE_ZERO;
rebaseSwizzle[2] = MESA_FORMAT_SWIZZLE_ZERO;
rebaseSwizzle[3] = MESA_FORMAT_SWIZZLE_ONE;
} else if (baseFormat == GL_LUMINANCE_ALPHA) {
needsRebase = true;
rebaseSwizzle[0] = MESA_FORMAT_SWIZZLE_X;
rebaseSwizzle[1] = MESA_FORMAT_SWIZZLE_ZERO;
rebaseSwizzle[2] = MESA_FORMAT_SWIZZLE_ZERO;
rebaseSwizzle[3] = MESA_FORMAT_SWIZZLE_W;
} else if (!is_compressed &&
(baseFormat != _mesa_get_format_base_format(texFormat))) {
needsRebase =
_mesa_compute_rgba2base2rgba_component_mapping(baseFormat,
rebaseSwizzle);
}
return needsRebase;
}
/**
* Get a color texture image with decompression.
*/
static void
get_tex_rgba_compressed(struct gl_context *ctx, GLuint dimensions,
GLint xoffset, GLint yoffset, GLint zoffset,
GLsizei width, GLsizei height, GLint depth,
GLenum format, GLenum type, GLvoid *pixels,
struct gl_texture_image *texImage,
GLbitfield transferOps)
{
/* don't want to apply sRGB -> RGB conversion here so override the format */
const mesa_format texFormat =
_mesa_get_srgb_format_linear(texImage->TexFormat);
const GLenum baseFormat = _mesa_get_format_base_format(texFormat);
GLfloat *tempImage, *tempSlice;
GLuint slice;
int srcStride, dstStride;
uint32_t dstFormat;
bool needsRebase;
uint8_t rebaseSwizzle[4];
/* Decompress into temp float buffer, then pack into user buffer */
tempImage = malloc((size_t)width * height * depth * 4 * sizeof(GLfloat));
if (!tempImage) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage()");
return;
}
/* Decompress the texture image slices - results in 'tempImage' */
for (slice = 0; slice < depth; slice++) {
GLubyte *srcMap;
GLint srcRowStride;
tempSlice = tempImage + slice * 4 * (size_t)width * height;
st_MapTextureImage(ctx, texImage, zoffset + slice,
xoffset, yoffset, width, height,
GL_MAP_READ_BIT,
&srcMap, &srcRowStride);
if (srcMap) {
_mesa_decompress_image(texFormat, width, height,
srcMap, srcRowStride, tempSlice);
st_UnmapTextureImage(ctx, texImage, zoffset + slice);
}
else {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage");
free(tempImage);
return;
}
}
needsRebase = teximage_needs_rebase(texFormat, baseFormat, true,
rebaseSwizzle);
srcStride = 4 * width * sizeof(GLfloat);
dstStride = _mesa_image_row_stride(&ctx->Pack, width, format, type);
dstFormat = _mesa_format_from_format_and_type(format, type);
tempSlice = tempImage;
for (slice = 0; slice < depth; slice++) {
void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels,
width, height, format, type,
slice, 0, 0);
_mesa_format_convert(dest, dstFormat, dstStride,
tempSlice, RGBA32_FLOAT, srcStride,
width, height,
needsRebase ? rebaseSwizzle : NULL);
/* Handle byte swapping if required */
if (ctx->Pack.SwapBytes) {
_mesa_swap_bytes_2d_image(format, type, &ctx->Pack,
width, height, dest, dest);
}
tempSlice += 4 * (size_t)width * height;
}
free(tempImage);
}
/**
* Return a base GL format given the user-requested format
* for glGetTexImage().
*/
GLenum
_mesa_base_pack_format(GLenum format)
{
switch (format) {
case GL_ABGR_EXT:
case GL_BGRA:
case GL_BGRA_INTEGER:
case GL_RGBA_INTEGER:
return GL_RGBA;
case GL_BGR:
case GL_BGR_INTEGER:
case GL_RGB_INTEGER:
return GL_RGB;
case GL_RED_INTEGER:
return GL_RED;
case GL_GREEN_INTEGER:
return GL_GREEN;
case GL_BLUE_INTEGER:
return GL_BLUE;
case GL_ALPHA_INTEGER:
return GL_ALPHA;
case GL_LUMINANCE_INTEGER_EXT:
return GL_LUMINANCE;
case GL_LUMINANCE_ALPHA_INTEGER_EXT:
return GL_LUMINANCE_ALPHA;
default:
return format;
}
}
/**
* Get an uncompressed color texture image.
*/
static void
get_tex_rgba_uncompressed(struct gl_context *ctx, GLuint dimensions,
GLint xoffset, GLint yoffset, GLint zoffset,
GLsizei width, GLsizei height, GLint depth,
GLenum format, GLenum type, GLvoid *pixels,
struct gl_texture_image *texImage,
GLbitfield transferOps)
{
/* don't want to apply sRGB -> RGB conversion here so override the format */
const mesa_format texFormat =
_mesa_get_srgb_format_linear(texImage->TexFormat);
GLuint img;
GLboolean dst_is_integer;
uint32_t dst_format;
int dst_stride;
uint8_t rebaseSwizzle[4];
bool needsRebase;
void *rgba = NULL;
needsRebase = teximage_needs_rebase(texFormat, texImage->_BaseFormat, false,
rebaseSwizzle);
/* Describe the dst format */
dst_is_integer = _mesa_is_enum_format_integer(format);
dst_format = _mesa_format_from_format_and_type(format, type);
dst_stride = _mesa_image_row_stride(&ctx->Pack, width, format, type);
/* Since _mesa_format_convert does not handle transferOps we need to handle
* them before we call the function. This requires to convert to RGBA float
* first so we can call _mesa_apply_rgba_transfer_ops. If the dst format is
* integer then transferOps do not apply.
*/
assert(!transferOps || (transferOps && !dst_is_integer));
(void) dst_is_integer; /* silence unused var warning */
for (img = 0; img < depth; img++) {
GLubyte *srcMap;
GLint rowstride;
GLubyte *img_src;
void *dest;
void *src;
int src_stride;
uint32_t src_format;
/* map src texture buffer */
st_MapTextureImage(ctx, texImage, zoffset + img,
xoffset, yoffset, width, height,
GL_MAP_READ_BIT,
&srcMap, &rowstride);
if (!srcMap) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage");
goto done;
}
img_src = srcMap;
dest = _mesa_image_address(dimensions, &ctx->Pack, pixels,
width, height, format, type,
img, 0, 0);
if (transferOps) {
uint32_t rgba_format;
int rgba_stride;
bool need_convert = false;
/* We will convert to RGBA float */
rgba_format = RGBA32_FLOAT;
rgba_stride = width * 4 * sizeof(GLfloat);
/* If we are lucky and the dst format matches the RGBA format we need
* to convert to, then we can convert directly into the dst buffer
* and avoid the final conversion/copy from the rgba buffer to the dst
* buffer.
*/
if (format == rgba_format) {
rgba = dest;
} else {
need_convert = true;
if (rgba == NULL) { /* Allocate the RGBA buffer only once */
rgba = malloc((size_t)height * rgba_stride);
if (!rgba) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage()");
st_UnmapTextureImage(ctx, texImage, img);
return;
}
}
}
_mesa_format_convert(rgba, rgba_format, rgba_stride,
img_src, texFormat, rowstride,
width, height,
needsRebase ? rebaseSwizzle : NULL);
/* Handle transfer ops now */
_mesa_apply_rgba_transfer_ops(ctx, transferOps,
(size_t)width * height, rgba);
/* If we had to rebase, we have already handled that */
needsRebase = false;
/* If we were lucky and our RGBA conversion matches the dst format,
* then we are done.
*/
if (!need_convert)
goto do_swap;
/* Otherwise, we need to convert from RGBA to dst next */
src = rgba;
src_format = rgba_format;
src_stride = rgba_stride;
} else {
/* No RGBA conversion needed, convert directly to dst */
src = img_src;
src_format = texFormat;
src_stride = rowstride;
}
/* Do the conversion to destination format */
_mesa_format_convert(dest, dst_format, dst_stride,
src, src_format, src_stride,
width, height,
needsRebase ? rebaseSwizzle : NULL);
do_swap:
/* Handle byte swapping if required */
if (ctx->Pack.SwapBytes)
_mesa_swap_bytes_2d_image(format, type, &ctx->Pack,
width, height, dest, dest);
/* Unmap the src texture buffer */
st_UnmapTextureImage(ctx, texImage, zoffset + img);
}
done:
free(rgba);
}
/**
* 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,
GLint xoffset, GLint yoffset, GLint zoffset,
GLsizei width, GLsizei height, GLint depth,
GLenum format, GLenum type, GLvoid *pixels,
struct gl_texture_image *texImage)
{
const GLenum dataType = _mesa_get_format_datatype(texImage->TexFormat);
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_needs_clamping(type)) {
/* the returned image type can't have negative values */
if (dataType == GL_FLOAT ||
dataType == GL_HALF_FLOAT ||
dataType == GL_SIGNED_NORMALIZED ||
format == GL_LUMINANCE ||
format == GL_LUMINANCE_ALPHA) {
transferOps |= IMAGE_CLAMP_BIT;
}
}
if (_mesa_is_format_compressed(texImage->TexFormat)) {
get_tex_rgba_compressed(ctx, dimensions,
xoffset, yoffset, zoffset,
width, height, depth,
format, type,
pixels, texImage, transferOps);
}
else {
get_tex_rgba_uncompressed(ctx, dimensions,
xoffset, yoffset, zoffset,
width, height, depth,
format, type,
pixels, texImage, transferOps);
}
}
/**
* Try to do glGetTexImage() with simple memcpy().
* \return GL_TRUE if done, GL_FALSE otherwise
*/
static GLboolean
get_tex_memcpy(struct gl_context *ctx,
GLint xoffset, GLint yoffset, GLint zoffset,
GLsizei width, GLsizei height, GLint depth,
GLenum format, GLenum type, GLvoid *pixels,
struct gl_texture_image *texImage)
{
const GLenum target = texImage->TexObject->Target;
GLboolean memCopy = GL_FALSE;
GLenum texBaseFormat = _mesa_get_format_base_format(texImage->TexFormat);
/*
* Check if we can use memcpy to copy from the hardware texture
* format to the user's format/type.
* Note that GL's pixel transfer ops don't apply to glGetTexImage()
*/
if ((target == GL_TEXTURE_1D ||
target == GL_TEXTURE_2D ||
target == GL_TEXTURE_RECTANGLE ||
_mesa_is_cube_face(target)) &&
texBaseFormat == texImage->_BaseFormat) {
memCopy = _mesa_format_matches_format_and_type(texImage->TexFormat,
format, type,
ctx->Pack.SwapBytes, NULL);
}
if (depth > 1) {
/* only a single slice is supported at this time */
memCopy = GL_FALSE;
}
if (memCopy) {
const GLuint bpp = _mesa_get_format_bytes(texImage->TexFormat);
const GLint bytesPerRow = width * bpp;
GLubyte *dst =
_mesa_image_address2d(&ctx->Pack, pixels, width, height,
format, type, 0, 0);
const GLint dstRowStride =
_mesa_image_row_stride(&ctx->Pack, width, format, type);
GLubyte *src;
GLint srcRowStride;
/* map src texture buffer */
st_MapTextureImage(ctx, texImage, zoffset,
xoffset, yoffset, width, height,
GL_MAP_READ_BIT, &src, &srcRowStride);
if (src) {
if (bytesPerRow == dstRowStride && bytesPerRow == srcRowStride) {
memcpy(dst, src, (size_t)bytesPerRow * height);
}
else {
GLuint row;
for (row = 0; row < height; row++) {
memcpy(dst, src, bytesPerRow);
dst += dstRowStride;
src += srcRowStride;
}
}
/* unmap src texture buffer */
st_UnmapTextureImage(ctx, texImage, zoffset);
}
else {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage");
}
}
return memCopy;
}
/**
* This is the software fallback for GetTexSubImage().
* All error checking will have been done before this routine is called.
*/
void
_mesa_GetTexSubImage_sw(struct gl_context *ctx,
GLint xoffset, GLint yoffset, GLint zoffset,
GLsizei width, GLsizei height, GLint depth,
GLenum format, GLenum type, GLvoid *pixels,
struct gl_texture_image *texImage)
{
const GLuint dimensions =
_mesa_get_texture_dimensions(texImage->TexObject->Target);
/* map dest buffer, if PBO */
if (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 *)
_mesa_bufferobj_map_range(ctx, 0, ctx->Pack.BufferObj->Size,
GL_MAP_WRITE_BIT, ctx->Pack.BufferObj,
MAP_INTERNAL);
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);
}
/* for all array textures, the Z axis selects the layer */
if (texImage->TexObject->Target == GL_TEXTURE_1D_ARRAY) {
depth = height;
height = 1;
zoffset = yoffset;
yoffset = 0;
assert(zoffset + depth <= texImage->Height);
} else {
assert(zoffset + depth <= texImage->Depth);
}
if (get_tex_memcpy(ctx, xoffset, yoffset, zoffset, width, height, depth,
format, type, pixels, texImage)) {
/* all done */
}
else if (format == GL_DEPTH_COMPONENT) {
get_tex_depth(ctx, dimensions, xoffset, yoffset, zoffset,
width, height, depth, format, type, pixels, texImage);
}
else if (format == GL_DEPTH_STENCIL_EXT) {
get_tex_depth_stencil(ctx, dimensions, xoffset, yoffset, zoffset,
width, height, depth, format, type, pixels,
texImage);
}
else if (format == GL_STENCIL_INDEX) {
get_tex_stencil(ctx, dimensions, xoffset, yoffset, zoffset,
width, height, depth, format, type, pixels, texImage);
}
else if (format == GL_YCBCR_MESA) {
get_tex_ycbcr(ctx, dimensions, xoffset, yoffset, zoffset,
width, height, depth, format, type, pixels, texImage);
}
else {
get_tex_rgba(ctx, dimensions, xoffset, yoffset, zoffset,
width, height, depth, format, type, pixels, texImage);
}
if (ctx->Pack.BufferObj) {
_mesa_bufferobj_unmap(ctx, ctx->Pack.BufferObj, MAP_INTERNAL);
}
}
/**
* This function assumes that all error checking has been done.
*/
static void
get_compressed_texsubimage_sw(struct gl_context *ctx,
struct gl_texture_image *texImage,
GLint xoffset, GLint yoffset,
GLint zoffset, GLsizei width,
GLint height, GLint depth,
GLvoid *img)
{
const GLuint dimensions =
_mesa_get_texture_dimensions(texImage->TexObject->Target);
struct compressed_pixelstore store;
GLint slice;
GLubyte *dest;
_mesa_compute_compressed_pixelstore(dimensions, texImage->TexFormat,
width, height, depth,
&ctx->Pack, &store);
if (ctx->Pack.BufferObj) {
/* pack texture image into a PBO */
dest = (GLubyte *)
_mesa_bufferobj_map_range(ctx, 0, ctx->Pack.BufferObj->Size,
GL_MAP_WRITE_BIT, ctx->Pack.BufferObj,
MAP_INTERNAL);
if (!dest) {
/* out of memory or other unexpected error */
_mesa_error(ctx, GL_OUT_OF_MEMORY,
"glGetCompresssedTexImage(map PBO failed)");
return;
}
dest = ADD_POINTERS(dest, img);
} else {
dest = img;
}
dest += store.SkipBytes;
for (slice = 0; slice < store.CopySlices; slice++) {
GLint srcRowStride;
GLubyte *src;
/* map src texture buffer */
st_MapTextureImage(ctx, texImage, zoffset + slice,
xoffset, yoffset, width, height,
GL_MAP_READ_BIT, &src, &srcRowStride);
if (src) {
GLint i;
for (i = 0; i < store.CopyRowsPerSlice; i++) {
memcpy(dest, src, store.CopyBytesPerRow);
dest += store.TotalBytesPerRow;
src += srcRowStride;
}
st_UnmapTextureImage(ctx, texImage, zoffset + slice);
/* Advance to next slice */
dest += (size_t)store.TotalBytesPerRow *
(store.TotalRowsPerSlice - store.CopyRowsPerSlice);
} else {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetCompresssedTexImage");
}
}
if (ctx->Pack.BufferObj) {
_mesa_bufferobj_unmap(ctx, ctx->Pack.BufferObj, MAP_INTERNAL);
}
}
/**
* Validate the texture target enum supplied to glGetTex(ture)Image or
* glGetCompressedTex(ture)Image.
*/
static GLboolean
legal_getteximage_target(struct gl_context *ctx, GLenum target, bool dsa)
{
switch (target) {
case GL_TEXTURE_1D:
case GL_TEXTURE_2D:
case GL_TEXTURE_3D:
return GL_TRUE;
case GL_TEXTURE_RECTANGLE_NV:
return ctx->Extensions.NV_texture_rectangle;
case GL_TEXTURE_1D_ARRAY_EXT:
case GL_TEXTURE_2D_ARRAY_EXT:
return ctx->Extensions.EXT_texture_array;
case GL_TEXTURE_CUBE_MAP_ARRAY:
return ctx->Extensions.ARB_texture_cube_map_array;
/* Section 8.11 (Texture Queries) of the OpenGL 4.5 core profile spec
* (30.10.2014) says:
* "An INVALID_ENUM error is generated if the effective target is not
* one of TEXTURE_1D, TEXTURE_2D, TEXTURE_3D, TEXTURE_1D_ARRAY,
* TEXTURE_2D_ARRAY, TEXTURE_CUBE_MAP_ARRAY, TEXTURE_RECTANGLE, one of
* the targets from table 8.19 (for GetTexImage and GetnTexImage *only*),
* or TEXTURE_CUBE_MAP (for GetTextureImage *only*)." (Emphasis added.)
*/
case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
return dsa ? GL_FALSE : GL_TRUE;
case GL_TEXTURE_CUBE_MAP:
return dsa ? GL_TRUE : GL_FALSE;
default:
return GL_FALSE;
}
}
/**
* Wrapper for _mesa_select_tex_image() which can handle target being
* GL_TEXTURE_CUBE_MAP in which case we use zoffset to select a cube face.
* This can happen for glGetTextureImage and glGetTextureSubImage (DSA
* functions).
*/
static struct gl_texture_image *
select_tex_image(const struct gl_texture_object *texObj, GLenum target,
GLint level, GLint zoffset)
{
assert(level >= 0);
assert(level < MAX_TEXTURE_LEVELS);
if (target == GL_TEXTURE_CUBE_MAP) {
assert(zoffset >= 0);
assert(zoffset < 6);
target = GL_TEXTURE_CUBE_MAP_POSITIVE_X + zoffset;
}
return _mesa_select_tex_image(texObj, target, level);
}
/**
* Error-check the offset and size arguments to
* glGet[Compressed]TextureSubImage().
* \return true if error, false if no error.
*/
static bool
dimensions_error_check(struct gl_context *ctx,
struct gl_texture_object *texObj,
GLenum target, GLint level,
GLint xoffset, GLint yoffset, GLint zoffset,
GLsizei width, GLsizei height, GLsizei depth,
const char *caller)
{
const struct gl_texture_image *texImage;
GLuint imageWidth = 0, imageHeight = 0, imageDepth = 0;
if (xoffset < 0) {
_mesa_error(ctx, GL_INVALID_VALUE, "%s(xoffset = %d)", caller, xoffset);
return true;
}
if (yoffset < 0) {
_mesa_error(ctx, GL_INVALID_VALUE, "%s(yoffset = %d)", caller, yoffset);
return true;
}
if (zoffset < 0) {
_mesa_error(ctx, GL_INVALID_VALUE, "%s(zoffset = %d)", caller, zoffset);
return true;
}
if (width < 0) {
_mesa_error(ctx, GL_INVALID_VALUE, "%s(width = %d)", caller, width);
return true;
}
if (height < 0) {
_mesa_error(ctx, GL_INVALID_VALUE, "%s(height = %d)", caller, height);
return true;
}
if (depth < 0) {
_mesa_error(ctx, GL_INVALID_VALUE, "%s(depth = %d)", caller, depth);
return true;
}
/* do special per-target checks */
switch (target) {
case GL_TEXTURE_1D:
if (yoffset != 0) {
_mesa_error(ctx, GL_INVALID_VALUE,
"%s(1D, yoffset = %d)", caller, yoffset);
return true;
}
if (height != 1) {
_mesa_error(ctx, GL_INVALID_VALUE,
"%s(1D, height = %d)", caller, height);
return true;
}
FALLTHROUGH;
case GL_TEXTURE_1D_ARRAY:
case GL_TEXTURE_2D:
case GL_TEXTURE_RECTANGLE:
if (zoffset != 0) {
_mesa_error(ctx, GL_INVALID_VALUE,
"%s(zoffset = %d)", caller, zoffset);
return true;
}
if (depth != 1) {
_mesa_error(ctx, GL_INVALID_VALUE,
"%s(depth = %d)", caller, depth);
return true;
}
break;
case GL_TEXTURE_CUBE_MAP:
/* Non-array cube maps are special because we have a gl_texture_image
* per face.
*/
if (zoffset + depth > 6) {
_mesa_error(ctx, GL_INVALID_VALUE,
"%s(zoffset + depth = %d)", caller, zoffset + depth);
return true;
}
break;
default:
; /* nothing */
}
texImage = select_tex_image(texObj, target, level, zoffset);
if (texImage) {
imageWidth = texImage->Width;
imageHeight = texImage->Height;
imageDepth = texImage->Depth;
}
if (xoffset + width > imageWidth) {
_mesa_error(ctx, GL_INVALID_VALUE,
"%s(xoffset %d + width %d > %u)",
caller, xoffset, width, imageWidth);
return true;
}
if (yoffset + height > imageHeight) {
_mesa_error(ctx, GL_INVALID_VALUE,
"%s(yoffset %d + height %d > %u)",
caller, yoffset, height, imageHeight);
return true;
}
if (target != GL_TEXTURE_CUBE_MAP) {
/* Cube map error checking was done above */
if (zoffset + depth > imageDepth) {
_mesa_error(ctx, GL_INVALID_VALUE,
"%s(zoffset %d + depth %d > %u)",
caller, zoffset, depth, imageDepth);
return true;
}
}
/* Extra checks for compressed textures */
if (texImage) {
GLuint bw, bh, bd;
_mesa_get_format_block_size_3d(texImage->TexFormat, &bw, &bh, &bd);
if (bw > 1 || bh > 1 || bd > 1) {
/* offset must be multiple of block size */
if (xoffset % bw != 0) {
_mesa_error(ctx, GL_INVALID_VALUE,
"%s(xoffset = %d)", caller, xoffset);
return true;
}
if (target != GL_TEXTURE_1D && target != GL_TEXTURE_1D_ARRAY) {
if (yoffset % bh != 0) {
_mesa_error(ctx, GL_INVALID_VALUE,
"%s(yoffset = %d)", caller, yoffset);
return true;
}
}
if (zoffset % bd != 0) {
_mesa_error(ctx, GL_INVALID_VALUE,
"%s(zoffset = %d)", caller, zoffset);
return true;
}
/* The size must be a multiple of bw x bh x bd, or we must be using a
* offset+size that exactly hits the edge of the image.
*/
if ((width % bw != 0) &&
(xoffset + width != (GLint) texImage->Width)) {
_mesa_error(ctx, GL_INVALID_VALUE,
"%s(width = %d)", caller, width);
return true;
}
if ((height % bh != 0) &&
(yoffset + height != (GLint) texImage->Height)) {
_mesa_error(ctx, GL_INVALID_VALUE,
"%s(height = %d)", caller, height);
return true;
}
if ((depth % bd != 0) &&
(zoffset + depth != (GLint) texImage->Depth)) {
_mesa_error(ctx, GL_INVALID_VALUE,
"%s(depth = %d)", caller, depth);
return true;
}
}
}
if (width == 0 || height == 0 || depth == 0) {
/* Not an error, but nothing to do. Return 'true' so that the
* caller simply returns.
*/
return true;
}
return false;
}
/**
* Do PBO-related error checking for getting uncompressed images.
* \return true if there was an error (or the GetTexImage is to be a no-op)
*/
static bool
pbo_error_check(struct gl_context *ctx, GLenum target,
GLsizei width, GLsizei height, GLsizei depth,
GLenum format, GLenum type, GLsizei clientMemSize,
GLvoid *pixels,
const char *caller)
{
const GLuint dimensions = (target == GL_TEXTURE_3D) ? 3 : 2;
if (!_mesa_validate_pbo_access(dimensions, &ctx->Pack, width, height, depth,
format, type, clientMemSize, pixels)) {
if (ctx->Pack.BufferObj) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(out of bounds PBO access)", caller);
} else {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(out of bounds access: bufSize (%d) is too small)",
caller, clientMemSize);
}
return true;
}
if (ctx->Pack.BufferObj) {
/* PBO should not be mapped */
if (_mesa_check_disallowed_mapping(ctx->Pack.BufferObj)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(PBO is mapped)", caller);
return true;
}
}
if (!ctx->Pack.BufferObj && !pixels) {
/* not an error, do nothing */
return true;
}
return false;
}
/**
* Do teximage-related error checking for getting uncompressed images.
* \return true if there was an error
*/
static bool
teximage_error_check(struct gl_context *ctx,
struct gl_texture_image *texImage,
GLenum format, const char *caller)
{
GLenum baseFormat;
assert(texImage);
/*
* Format and type checking has been moved up to GetnTexImage and
* GetTextureImage so that it happens before getting the texImage object.
*/
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,
"%s(format mismatch)", caller);
return true;
}
else if (_mesa_is_depth_format(format)
&& !_mesa_is_depth_format(baseFormat)
&& !_mesa_is_depthstencil_format(baseFormat)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(format mismatch)", caller);
return true;
}
else if (_mesa_is_stencil_format(format)
&& !ctx->Extensions.ARB_texture_stencil8) {
_mesa_error(ctx, GL_INVALID_ENUM,
"%s(format=GL_STENCIL_INDEX)", caller);
return true;
}
else if (_mesa_is_stencil_format(format)
&& !_mesa_is_depthstencil_format(baseFormat)
&& !_mesa_is_stencil_format(baseFormat)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(format mismatch)", caller);
return true;
}
else if (_mesa_is_ycbcr_format(format)
&& !_mesa_is_ycbcr_format(baseFormat)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(format mismatch)", caller);
return true;
}
else if (_mesa_is_depthstencil_format(format)
&& !_mesa_is_depthstencil_format(baseFormat)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(format mismatch)", caller);
return true;
}
else if (!_mesa_is_stencil_format(format) &&
_mesa_is_enum_format_integer(format) !=
_mesa_is_format_integer(texImage->TexFormat)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(format mismatch)", caller);
return true;
}
return false;
}
/**
* Do common teximage-related error checking for getting uncompressed images.
* \return true if there was an error
*/
static bool
common_error_check(struct gl_context *ctx,
struct gl_texture_object *texObj,
GLenum target, GLint level,
GLsizei width, GLsizei height, GLsizei depth,
GLenum format, GLenum type, GLsizei bufSize,
GLvoid *pixels, const char *caller)
{
GLenum err;
GLint maxLevels;
if (texObj->Target == 0) {
_mesa_error(ctx, GL_INVALID_OPERATION, "%s(invalid texture)", caller);
return true;
}
maxLevels = _mesa_max_texture_levels(ctx, target);
if (level < 0 || level >= maxLevels) {
_mesa_error(ctx, GL_INVALID_VALUE, "%s(level = %d)", caller, level);
return true;
}
err = _mesa_error_check_format_and_type(ctx, format, type);
if (err != GL_NO_ERROR) {
_mesa_error(ctx, err, "%s(format/type)", caller);
return true;
}
/* According to OpenGL 4.6 spec, section 8.11.4 ("Texture Image Queries"):
*
* "An INVALID_OPERATION error is generated by GetTextureImage if the
* effective target is TEXTURE_CUBE_MAP or TEXTURE_CUBE_MAP_ARRAY ,
* and the texture object is not cube complete or cube array complete,
* respectively."
*
* This applies also to GetTextureSubImage, GetCompressedTexImage,
* GetCompressedTextureImage, and GetnCompressedTexImage.
*/
if (target == GL_TEXTURE_CUBE_MAP && !_mesa_cube_complete(texObj)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(cube incomplete)", caller);
return true;
}
return false;
}
/**
* Do error checking for all (non-compressed) get-texture-image functions.
* \return true if any error, false if no errors.
*/
static bool
getteximage_error_check(struct gl_context *ctx,
struct gl_texture_object *texObj,
GLenum target, GLint level,
GLsizei width, GLsizei height, GLsizei depth,
GLenum format, GLenum type, GLsizei bufSize,
GLvoid *pixels, const char *caller)
{
struct gl_texture_image *texImage;
assert(texObj);
if (common_error_check(ctx, texObj, target, level, width, height, depth,
format, type, bufSize, pixels, caller)) {
return true;
}
if (width == 0 || height == 0 || depth == 0) {
/* Not an error, but nothing to do. Return 'true' so that the
* caller simply returns.
*/
return true;
}
if (pbo_error_check(ctx, target, width, height, depth,
format, type, bufSize, pixels, caller)) {
return true;
}
texImage = select_tex_image(texObj, target, level, 0);
if (teximage_error_check(ctx, texImage, format, caller)) {
return true;
}
return false;
}
/**
* Do error checking for all (non-compressed) get-texture-image functions.
* \return true if any error, false if no errors.
*/
static bool
gettexsubimage_error_check(struct gl_context *ctx,
struct gl_texture_object *texObj,
GLenum target, GLint level,
GLint xoffset, GLint yoffset, GLint zoffset,
GLsizei width, GLsizei height, GLsizei depth,
GLenum format, GLenum type, GLsizei bufSize,
GLvoid *pixels, const char *caller)
{
struct gl_texture_image *texImage;
assert(texObj);
if (common_error_check(ctx, texObj, target, level, width, height, depth,
format, type, bufSize, pixels, caller)) {
return true;
}
if (dimensions_error_check(ctx, texObj, target, level,
xoffset, yoffset, zoffset,
width, height, depth, caller)) {
return true;
}
if (pbo_error_check(ctx, target, width, height, depth,
format, type, bufSize, pixels, caller)) {
return true;
}
texImage = select_tex_image(texObj, target, level, zoffset);
if (teximage_error_check(ctx, texImage, format, caller)) {
return true;
}
return false;
}
/**
* Return the width, height and depth of a texture image.
* This function must be resilient to bad parameter values since
* this is called before full error checking.
*/
static void
get_texture_image_dims(const struct gl_texture_object *texObj,
GLenum target, GLint level,
GLsizei *width, GLsizei *height, GLsizei *depth)
{
const struct gl_texture_image *texImage = NULL;
if (level >= 0 && level < MAX_TEXTURE_LEVELS) {
texImage = _mesa_select_tex_image(texObj, target, level);
}
if (texImage) {
*width = texImage->Width;
*height = texImage->Height;
if (target == GL_TEXTURE_CUBE_MAP) {
*depth = 6;
}
else {
*depth = texImage->Depth;
}
}
else {
*width = *height = *depth = 0;
}
}
/**
* Common code for all (uncompressed) get-texture-image functions.
* \param texObj the texture object (should not be null)
* \param target user-provided target, or 0 for DSA
* \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.
* \param caller name of calling function
*/
static void
get_texture_image(struct gl_context *ctx,
struct gl_texture_object *texObj,
GLenum target, GLint level,
GLint xoffset, GLint yoffset, GLint zoffset,
GLsizei width, GLsizei height, GLint depth,
GLenum format, GLenum type,
GLvoid *pixels, const char *caller)
{
struct gl_texture_image *texImage;
unsigned firstFace, numFaces, i;
intptr_t imageStride;
FLUSH_VERTICES(ctx, 0, 0);
texImage = select_tex_image(texObj, target, level, zoffset);
assert(texImage); /* should have been error checked already */
if (_mesa_is_zero_size_texture(texImage)) {
/* no image data to return */
return;
}
if (target == GL_TEXTURE_CUBE_MAP) {
/* Compute stride between cube faces */
imageStride = _mesa_image_image_stride(&ctx->Pack, width, height,
format, type);
firstFace = zoffset;
numFaces = depth;
zoffset = 0;
depth = 1;
}
else {
imageStride = 0;
firstFace = _mesa_tex_target_to_face(target);
numFaces = 1;
}
if (ctx->Pack.BufferObj)
ctx->Pack.BufferObj->UsageHistory |= USAGE_PIXEL_PACK_BUFFER;
_mesa_lock_texture(ctx, texObj);
for (i = 0; i < numFaces; i++) {
texImage = texObj->Image[firstFace + i][level];
assert(texImage);
st_GetTexSubImage(ctx, xoffset, yoffset, zoffset,
width, height, depth,
format, type, pixels, texImage);
/* next cube face */
pixels = (GLubyte *) pixels + imageStride;
}
_mesa_unlock_texture(ctx, texObj);
}
static void
_get_texture_image(struct gl_context *ctx,
struct gl_texture_object *texObj,
GLenum target, GLint level,
GLenum format, GLenum type,
GLsizei bufSize, GLvoid *pixels,
const char *caller)
{
GLsizei width, height, depth;
/* EXT/ARB direct_state_access variants don't call _get_texture_image
* with a NULL texObj */
bool is_dsa = texObj != NULL;
if (!is_dsa) {
texObj = _mesa_get_current_tex_object(ctx, target);
assert(texObj);
}
get_texture_image_dims(texObj, target, level, &width, &height, &depth);
if (getteximage_error_check(ctx, texObj, target, level,
width, height, depth,
format, type, bufSize, pixels, caller)) {
return;
}
get_texture_image(ctx, texObj, target, level,
0, 0, 0, width, height, depth,
format, type, pixels, caller);
}
void GLAPIENTRY
_mesa_GetnTexImageARB(GLenum target, GLint level, GLenum format, GLenum type,
GLsizei bufSize, GLvoid *pixels)
{
GET_CURRENT_CONTEXT(ctx);
static const char *caller = "glGetnTexImageARB";
if (!legal_getteximage_target(ctx, target, false)) {
_mesa_error(ctx, GL_INVALID_ENUM, "%s", caller);
return;
}
_get_texture_image(ctx, NULL, target, level, format, type,
bufSize, pixels, caller);
}
void GLAPIENTRY
_mesa_GetTexImage(GLenum target, GLint level, GLenum format, GLenum type,
GLvoid *pixels )
{
GET_CURRENT_CONTEXT(ctx);
static const char *caller = "glGetTexImage";
if (!legal_getteximage_target(ctx, target, false)) {
_mesa_error(ctx, GL_INVALID_ENUM, "%s", caller);
return;
}
_get_texture_image(ctx, NULL, target, level, format, type,
INT_MAX, pixels, caller);
}
void GLAPIENTRY
_mesa_GetTextureImage(GLuint texture, GLint level, GLenum format, GLenum type,
GLsizei bufSize, GLvoid *pixels)
{
GET_CURRENT_CONTEXT(ctx);
static const char *caller = "glGetTextureImage";
struct gl_texture_object *texObj =
_mesa_lookup_texture_err(ctx, texture, caller);
if (!texObj) {
return;
}
if (!legal_getteximage_target(ctx, texObj->Target, true)) {
_mesa_error(ctx, GL_INVALID_OPERATION, "%s", caller);
return;
}
_get_texture_image(ctx, texObj, texObj->Target, level, format, type,
bufSize, pixels, caller);
}
void GLAPIENTRY
_mesa_GetTextureImageEXT(GLuint texture, GLenum target, GLint level,
GLenum format, GLenum type, GLvoid *pixels)
{
GET_CURRENT_CONTEXT(ctx);
static const char *caller = "glGetTextureImageEXT";
struct gl_texture_object *texObj =
_mesa_lookup_or_create_texture(ctx, target, texture,
false, true, caller);
if (!texObj) {
return;
}
if (!legal_getteximage_target(ctx, target, true)) {
_mesa_error(ctx, GL_INVALID_ENUM, "%s", caller);
return;
}
_get_texture_image(ctx, texObj, target, level, format, type,
INT_MAX, pixels, caller);
}
void GLAPIENTRY
_mesa_GetMultiTexImageEXT(GLenum texunit, GLenum target, GLint level,
GLenum format, GLenum type, GLvoid *pixels)
{
GET_CURRENT_CONTEXT(ctx);
GLsizei width, height, depth;
static const char *caller = "glGetMultiTexImageEXT";
struct gl_texture_object *texObj =
_mesa_get_texobj_by_target_and_texunit(ctx, target,
texunit - GL_TEXTURE0,
false,
caller);
if (!texObj) {
return;
}
if (!legal_getteximage_target(ctx, texObj->Target, true)) {
_mesa_error(ctx, GL_INVALID_OPERATION, "%s", caller);
return;
}
get_texture_image_dims(texObj, texObj->Target, level,
&width, &height, &depth);
if (getteximage_error_check(ctx, texObj, texObj->Target, level,
width, height, depth,
format, type, INT_MAX, pixels, caller)) {
return;
}
get_texture_image(ctx, texObj, texObj->Target, level,
0, 0, 0, width, height, depth,
format, type, pixels, caller);
}
void GLAPIENTRY
_mesa_GetTextureSubImage(GLuint texture, GLint level,
GLint xoffset, GLint yoffset, GLint zoffset,
GLsizei width, GLsizei height, GLsizei depth,
GLenum format, GLenum type, GLsizei bufSize,
void *pixels)
{
GET_CURRENT_CONTEXT(ctx);
static const char *caller = "glGetTextureSubImage";
struct gl_texture_object *texObj =
_mesa_lookup_texture_err(ctx, texture, caller);
if (!texObj) {
return;
}
if (!legal_getteximage_target(ctx, texObj->Target, true)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(buffer/multisample texture)", caller);
return;
}
if (gettexsubimage_error_check(ctx, texObj, texObj->Target, level,
xoffset, yoffset, zoffset,
width, height, depth,
format, type, bufSize, pixels, caller)) {
return;
}
get_texture_image(ctx, texObj, texObj->Target, level,
xoffset, yoffset, zoffset, width, height, depth,
format, type, pixels, caller);
}
/**
* Compute the number of bytes which will be written when retrieving
* a sub-region of a compressed texture.
*/
static size_t
packed_compressed_size(GLuint dimensions, mesa_format format,
GLsizei width, GLsizei height, GLsizei depth,
const struct gl_pixelstore_attrib *packing)
{
struct compressed_pixelstore st;
size_t totalBytes;
_mesa_compute_compressed_pixelstore(dimensions, format,
width, height, depth,
packing, &st);
totalBytes =
(size_t)(st.CopySlices - 1) * st.TotalRowsPerSlice * st.TotalBytesPerRow +
st.SkipBytes +
(size_t)(st.CopyRowsPerSlice - 1) * st.TotalBytesPerRow +
st.CopyBytesPerRow;
return totalBytes;
}
/**
* Do error checking for getting compressed texture images.
* \return true if any error, false if no errors.
*/
static bool
getcompressedteximage_error_check(struct gl_context *ctx,
struct gl_texture_object *texObj,
GLenum target, GLint level,
GLint xoffset, GLint yoffset, GLint zoffset,
GLsizei width, GLsizei height, GLsizei depth,
size_t bufSize, GLvoid *pixels,
const char *caller)
{
struct gl_texture_image *texImage;
GLint maxLevels;
size_t totalBytes;
GLuint dimensions;
assert(texObj);
if (texObj->Target == 0) {
_mesa_error(ctx, GL_INVALID_OPERATION, "%s(invalid texture)", caller);
return true;
}
maxLevels = _mesa_max_texture_levels(ctx, target);
if (level < 0 || level >= maxLevels) {
_mesa_error(ctx, GL_INVALID_VALUE,
"%s(bad level = %d)", caller, level);
return true;
}
if (dimensions_error_check(ctx, texObj, target, level,
xoffset, yoffset, zoffset,
width, height, depth, caller)) {
return true;
}
texImage = select_tex_image(texObj, target, level, zoffset);
assert(texImage);
if (!_mesa_is_format_compressed(texImage->TexFormat)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(texture is not compressed)", caller);
return true;
}
/* Check for invalid pixel storage modes */
dimensions = _mesa_get_texture_dimensions(texObj->Target);
if (!_mesa_compressed_pixel_storage_error_check(ctx, dimensions,
&ctx->Pack,
caller)) {
return true;
}
/* Compute number of bytes that may be touched in the dest buffer */
totalBytes = packed_compressed_size(dimensions, texImage->TexFormat,
width, height, depth,
&ctx->Pack);
/* Do dest buffer bounds checking */
if (ctx->Pack.BufferObj) {
/* do bounds checking on PBO write */
if ((GLubyte *) pixels + totalBytes >
(GLubyte *) ctx->Pack.BufferObj->Size) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(out of bounds PBO access)", caller);
return true;
}
/* make sure PBO is not mapped */
if (_mesa_check_disallowed_mapping(ctx->Pack.BufferObj)) {
_mesa_error(ctx, GL_INVALID_OPERATION, "%s(PBO is mapped)", caller);
return true;
}
}
else {
/* do bounds checking on writing to client memory */
if (totalBytes > bufSize) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(out of bounds access: bufSize (%zu) is too small)",
caller, bufSize);
return true;
}
}
if (!ctx->Pack.BufferObj && !pixels) {
/* not an error, but do nothing */
return true;
}
return false;
}
/**
* Common helper for all glGetCompressed-teximage functions.
*/
static void
get_compressed_texture_image(struct gl_context *ctx,
struct gl_texture_object *texObj,
GLenum target, GLint level,
GLint xoffset, GLint yoffset, GLint zoffset,
GLsizei width, GLsizei height, GLint depth,
GLvoid *pixels,
const char *caller)
{
struct gl_texture_image *texImage;
unsigned firstFace, numFaces, i;
size_t imageStride;
FLUSH_VERTICES(ctx, 0, 0);
texImage = select_tex_image(texObj, target, level, zoffset);
assert(texImage); /* should have been error checked already */
if (_mesa_is_zero_size_texture(texImage))
return;
if (target == GL_TEXTURE_CUBE_MAP) {
struct compressed_pixelstore store;
/* Compute image stride between cube faces */
_mesa_compute_compressed_pixelstore(2, texImage->TexFormat,
width, height, depth,
&ctx->Pack, &store);
imageStride = (size_t)store.TotalBytesPerRow * store.TotalRowsPerSlice;
firstFace = zoffset;
numFaces = depth;
zoffset = 0;
depth = 1;
}
else {
imageStride = 0;
firstFace = _mesa_tex_target_to_face(target);
numFaces = 1;
}
if (ctx->Pack.BufferObj)
ctx->Pack.BufferObj->UsageHistory |= USAGE_PIXEL_PACK_BUFFER;
_mesa_lock_texture(ctx, texObj);
for (i = 0; i < numFaces; i++) {
texImage = texObj->Image[firstFace + i][level];
assert(texImage);
get_compressed_texsubimage_sw(ctx, texImage,
xoffset, yoffset, zoffset,
width, height, depth, pixels);
/* next cube face */
pixels = (GLubyte *) pixels + imageStride;
}
_mesa_unlock_texture(ctx, texObj);
}
void GLAPIENTRY
_mesa_GetnCompressedTexImageARB(GLenum target, GLint level, GLsizei bufSize,
GLvoid *pixels)
{
GET_CURRENT_CONTEXT(ctx);
static const char *caller = "glGetnCompressedTexImageARB";
GLsizei width, height, depth;
struct gl_texture_object *texObj;
if (!legal_getteximage_target(ctx, target, false)) {
_mesa_error(ctx, GL_INVALID_ENUM, "%s", caller);
return;
}
texObj = _mesa_get_current_tex_object(ctx, target);
assert(texObj);
get_texture_image_dims(texObj, target, level, &width, &height, &depth);
if (getcompressedteximage_error_check(ctx, texObj, target, level,
0, 0, 0, width, height, depth,
INT_MAX, pixels, caller)) {
return;
}
get_compressed_texture_image(ctx, texObj, target, level,
0, 0, 0, width, height, depth,
pixels, caller);
}
void GLAPIENTRY
_mesa_GetCompressedTexImage(GLenum target, GLint level, GLvoid *pixels)
{
GET_CURRENT_CONTEXT(ctx);
static const char *caller = "glGetCompressedTexImage";
GLsizei width, height, depth;
struct gl_texture_object *texObj;
if (!legal_getteximage_target(ctx, target, false)) {
_mesa_error(ctx, GL_INVALID_ENUM, "%s", caller);
return;
}
texObj = _mesa_get_current_tex_object(ctx, target);
assert(texObj);
get_texture_image_dims(texObj, target, level,
&width, &height, &depth);
if (getcompressedteximage_error_check(ctx, texObj, target, level,
0, 0, 0, width, height, depth,
INT_MAX, pixels, caller)) {
return;
}
get_compressed_texture_image(ctx, texObj, target, level,
0, 0, 0, width, height, depth,
pixels, caller);
}
void GLAPIENTRY
_mesa_GetCompressedTextureImageEXT(GLuint texture, GLenum target, GLint level,
GLvoid *pixels)
{
GET_CURRENT_CONTEXT(ctx);
struct gl_texture_object* texObj;
GLsizei width, height, depth;
static const char *caller = "glGetCompressedTextureImageEXT";
texObj = _mesa_lookup_or_create_texture(ctx, target, texture,
false, true, caller);
get_texture_image_dims(texObj, texObj->Target, level,
&width, &height, &depth);
if (getcompressedteximage_error_check(ctx, texObj, texObj->Target, level,
0, 0, 0, width, height, depth,
INT_MAX, pixels, caller)) {
return;
}
get_compressed_texture_image(ctx, texObj, texObj->Target, level,
0, 0, 0, width, height, depth,
pixels, caller);
}
void GLAPIENTRY
_mesa_GetCompressedMultiTexImageEXT(GLenum texunit, GLenum target, GLint level,
GLvoid *pixels)
{
GET_CURRENT_CONTEXT(ctx);
struct gl_texture_object* texObj;
GLsizei width, height, depth;
static const char *caller = "glGetCompressedMultiTexImageEXT";
texObj = _mesa_get_texobj_by_target_and_texunit(ctx, target,
texunit - GL_TEXTURE0,
false,
caller);
get_texture_image_dims(texObj, texObj->Target, level,
&width, &height, &depth);
if (getcompressedteximage_error_check(ctx, texObj, texObj->Target, level,
0, 0, 0, width, height, depth,
INT_MAX, pixels, caller)) {
return;
}
get_compressed_texture_image(ctx, texObj, texObj->Target, level,
0, 0, 0, width, height, depth,
pixels, caller);
}
void GLAPIENTRY
_mesa_GetCompressedTextureImage(GLuint texture, GLint level,
GLsizei bufSize, GLvoid *pixels)
{
GET_CURRENT_CONTEXT(ctx);
static const char *caller = "glGetCompressedTextureImage";
GLsizei width, height, depth;
struct gl_texture_object *texObj =
_mesa_lookup_texture_err(ctx, texture, caller);
if (!texObj) {
return;
}
get_texture_image_dims(texObj, texObj->Target, level,
&width, &height, &depth);
if (getcompressedteximage_error_check(ctx, texObj, texObj->Target, level,
0, 0, 0, width, height, depth,
bufSize, pixels, caller)) {
return;
}
get_compressed_texture_image(ctx, texObj, texObj->Target, level,
0, 0, 0, width, height, depth,
pixels, caller);
}
void GLAPIENTRY
_mesa_GetCompressedTextureSubImage(GLuint texture, GLint level,
GLint xoffset, GLint yoffset,
GLint zoffset, GLsizei width,
GLsizei height, GLsizei depth,
GLsizei bufSize, void *pixels)
{
GET_CURRENT_CONTEXT(ctx);
static const char *caller = "glGetCompressedTextureImage";
struct gl_texture_object *texObj = NULL;
texObj = _mesa_lookup_texture_err(ctx, texture, caller);
if (!texObj) {
return;
}
if (getcompressedteximage_error_check(ctx, texObj, texObj->Target, level,
xoffset, yoffset, zoffset,
width, height, depth,
bufSize, pixels, caller)) {
return;
}
get_compressed_texture_image(ctx, texObj, texObj->Target, level,
xoffset, yoffset, zoffset,
width, height, depth,
pixels, caller);
}
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