void
_mesa_update_fetch_functions(struct gl_context *ctx, GLuint unit)
{
struct gl_texture_object *texObj = ctx->Texture.Unit[unit]._Current;
struct gl_sampler_object *samp;
GLuint face, i;
GLuint dims;
if (!texObj)
return;
samp = _mesa_get_samplerobj(ctx, unit);
dims = _mesa_get_texture_dimensions(texObj->Target);
for (face = 0; face < 6; face++) {
for (i = 0; i < MAX_TEXTURE_LEVELS; i++) {
if (texObj->Image[face][i]) {
set_fetch_functions(samp,
swrast_texture_image(texObj->Image[face][i]),
dims);
}
}
}
}
/**
* This is the software fallback for Driver.GetTexImage().
* All error checking will have been done before this routine is called.
* We'll call ctx->Driver.MapTextureImage() to access the data, then
* unmap with ctx->Driver.UnmapTextureImage().
*/
void
_mesa_GetTexImage_sw(struct gl_context *ctx,
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 (_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,
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);
}
if (get_tex_memcpy(ctx, format, type, pixels, texImage)) {
/* all done */
}
else if (format == GL_DEPTH_COMPONENT) {
get_tex_depth(ctx, dimensions, format, type, pixels, texImage);
}
else if (format == GL_DEPTH_STENCIL) {
get_tex_depth_stencil(ctx, dimensions, format, type, pixels, texImage);
}
else if (format == GL_STENCIL_INDEX) {
get_tex_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, MAP_INTERNAL);
}
}
/*
* Returns the dimensions associated to a target. GL_TEXTURE_BUFFER and
* GL_RENDERBUFFER have associated a dimension, but they are not textures
* per-se, so we can't just call _mesa_get_texture_dimension directly.
*/
static GLint
_get_target_dimensions(GLenum target)
{
switch(target) {
case GL_TEXTURE_BUFFER:
return 1;
case GL_RENDERBUFFER:
return 2;
default:
return _mesa_get_texture_dimensions(target);
}
}
void
_mesa_update_fetch_functions(struct gl_texture_object *texObj)
{
GLuint face, i;
GLuint dims;
dims = _mesa_get_texture_dimensions(texObj->Target);
for (face = 0; face < 6; face++) {
for (i = 0; i < MAX_TEXTURE_LEVELS; i++) {
if (texObj->Image[face][i]) {
set_fetch_functions(swrast_texture_image(texObj->Image[face][i]),
dims);
}
}
}
}
/**
* This is the software fallback for Driver.GetCompressedTexImage().
* All error checking will have been done before this routine is called.
*/
void
_mesa_GetCompressedTexImage_sw(struct gl_context *ctx,
struct gl_texture_image *texImage,
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,
texImage->Width, texImage->Height,
texImage->Depth,
&ctx->Pack,
&store);
if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
/* pack texture image into a PBO */
dest = (GLubyte *)
ctx->Driver.MapBufferRange(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 */
ctx->Driver.MapTextureImage(ctx, texImage, slice,
0, 0, texImage->Width, texImage->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;
}
ctx->Driver.UnmapTextureImage(ctx, texImage, slice);
/* Advance to next slice */
dest += store.TotalBytesPerRow * (store.TotalRowsPerSlice - store.CopyRowsPerSlice);
} else {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetCompresssedTexImage");
}
}
if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
ctx->Driver.UnmapBuffer(ctx, ctx->Pack.BufferObj, MAP_INTERNAL);
}
}
/**
* 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,
struct gl_texture_image *texImage,
GLenum target,
GLint level, GLsizei clientMemSize,
GLvoid *img, bool dsa)
{
const GLint maxLevels = _mesa_max_texture_levels(ctx, target);
GLuint compressedSize, dimensions;
const char *suffix = dsa ? "ture" : "";
assert(texImage);
if (!legal_getteximage_target(ctx, target, dsa)) {
_mesa_error(ctx, GL_INVALID_ENUM,
"glGetCompressedTex%sImage(target=%s)", suffix,
_mesa_lookup_enum_by_nr(target));
return GL_TRUE;
}
assert(maxLevels != 0);
if (level < 0 || level >= maxLevels) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glGetCompressedTex%sImage(bad level = %d)", suffix, level);
return GL_TRUE;
}
if (!_mesa_is_format_compressed(texImage->TexFormat)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glGetCompressedTex%sImage(texture is not compressed)",
suffix);
return GL_TRUE;
}
compressedSize = _mesa_format_image_size(texImage->TexFormat,
texImage->Width,
texImage->Height,
texImage->Depth);
/* Check for invalid pixel storage modes */
dimensions = _mesa_get_texture_dimensions(texImage->TexObject->Target);
if (!_mesa_compressed_pixel_storage_error_check(ctx, dimensions,
&ctx->Pack, dsa ?
"glGetCompressedTextureImage":
"glGetCompressedTexImage")) {
return GL_TRUE;
}
if (!_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
/* do bounds checking on writing to client memory */
if (clientMemSize < (GLsizei) compressedSize) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(out of bounds access: bufSize (%d) is too small)",
dsa ? "glGetCompressedTextureImage" :
"glGetnCompressedTexImageARB", clientMemSize);
return GL_TRUE;
}
} else {
/* do bounds checking on PBO write */
if ((const GLubyte *) img + compressedSize >
(const GLubyte *) ctx->Pack.BufferObj->Size) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glGetCompressedTex%sImage(out of bounds PBO access)",
suffix);
return GL_TRUE;
}
/* make sure PBO is not mapped */
if (_mesa_check_disallowed_mapping(ctx->Pack.BufferObj)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glGetCompressedTex%sImage(PBO is mapped)", suffix);
return GL_TRUE;
}
}
return GL_FALSE;
}
/**
* 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, dimensions;
if (!legal_getteximage_target(ctx, target)) {
_mesa_error(ctx, GL_INVALID_ENUM, "glGetCompressedTexImage(target=0x%x)",
target);
return GL_TRUE;
}
assert(maxLevels != 0);
if (level < 0 || level >= maxLevels) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glGetCompressedTexImageARB(bad level = %d)", level);
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);
/* Check for invalid pixel storage modes */
dimensions = _mesa_get_texture_dimensions(texImage->TexObject->Target);
if (!_mesa_compressed_texture_pixel_storage_error_check(ctx, dimensions,
&ctx->Pack,
"glGetCompressedTexImageARB")) {
return GL_TRUE;
}
if (!_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
/* do bounds checking on writing to client memory */
if (clientMemSize < (GLsizei) compressedSize) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glGetnCompressedTexImageARB(out of bounds access:"
" bufSize (%d) is too small)", clientMemSize);
return GL_TRUE;
}
} 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_check_disallowed_mapping(ctx->Pack.BufferObj)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glGetCompressedTexImage(PBO is mapped)");
return GL_TRUE;
}
}
return GL_FALSE;
}