/**
* Get compressed texture image.
*
* \param texture texture name.
* \param level image level.
* \param bufSize size of the pixels data buffer.
* \param pixels returned pixel data.
*/
void glGetCompressedTextureImage(GLuint texture, GLint level,
GLsizei bufSize, GLvoid *pixels)
{
struct gl_texture_object *texObj;
struct gl_texture_image *texImage;
int i;
GLint image_stride;
GET_CURRENT_CONTEXT(ctx);
texObj = _mesa_lookup_texture_err(ctx, texture,
"glGetCompressedTextureImage");
if (!texObj)
return;
/* Must handle special case GL_TEXTURE_CUBE_MAP. */
if (texObj->Target == GL_TEXTURE_CUBE_MAP) {
/* Make sure the texture object is a proper cube.
* (See texturesubimage in teximage.c for details on why this check is
* performed.)
*/
if (!_mesa_cube_level_complete(texObj, level)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glGetCompressedTextureImage(cube map incomplete)");
return;
}
/* Copy each face. */
for (i = 0; i < 6; ++i) {
texImage = texObj->Image[i][level];
assert(texImage);
_mesa_get_compressed_texture_image(ctx, texObj, texImage,
texObj->Target, level,
bufSize, pixels, true);
/* Compressed images don't have a client format */
image_stride = _mesa_format_image_size(texImage->TexFormat,
texImage->Width,
texImage->Height, 1);
pixels = (GLubyte *) pixels + image_stride;
bufSize -= image_stride;
}
}
else {
texImage = _mesa_select_tex_image(texObj, texObj->Target, level);
if (!texImage)
return;
_mesa_get_compressed_texture_image(ctx, texObj, texImage,
texObj->Target, level, bufSize,
pixels, true);
}
}
/**
* Helper used by _mesa_TextureStorage1/2/3D().
*/
static void
texturestorage(GLuint dims, GLuint texture, GLsizei levels,
GLenum internalformat, GLsizei width, GLsizei height,
GLsizei depth, const char *caller)
{
struct gl_texture_object *texObj;
GET_CURRENT_CONTEXT(ctx);
if (MESA_VERBOSE & (VERBOSE_API|VERBOSE_TEXTURE))
_mesa_debug(ctx, "%s %d %d %s %d %d %d\n",
caller, texture, levels,
_mesa_enum_to_string(internalformat),
width, height, depth);
/* Check the format to make sure it is sized. */
if (!_mesa_is_legal_tex_storage_format(ctx, internalformat)) {
_mesa_error(ctx, GL_INVALID_ENUM,
"%s(internalformat = %s)", caller,
_mesa_enum_to_string(internalformat));
return;
}
texObj = _mesa_lookup_texture_err(ctx, texture, caller);
if (!texObj)
return;
/* Check target. This is done here so that texture_storage
* can receive unsized formats.
*/
if (!legal_texobj_target(ctx, dims, texObj->Target)) {
_mesa_error(ctx, GL_INVALID_ENUM,
"%s(illegal target=%s)", caller,
_mesa_enum_to_string(texObj->Target));
return;
}
texture_storage(ctx, dims, texObj, texObj->Target,
levels, internalformat, width, height, depth, true);
}
/**
* Get texture image.
*
* \param texture texture name.
* \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 glGetTextureImage(GLuint texture, GLint level, GLenum format,
GLenum type, GLsizei bufSize, GLvoid *pixels)
{
struct gl_texture_object *texObj;
struct gl_texture_image *texImage;
int i;
GLint image_stride;
GLenum err;
GET_CURRENT_CONTEXT(ctx);
/*
* This has been moved here because a format/type mismatch can cause a NULL
* texImage object, which in turn causes the mismatch error to be
* ignored.
*/
err = _mesa_error_check_format_and_type(ctx, format, type);
if (err != GL_NO_ERROR) {
_mesa_error(ctx, err, "glGetTextureImage(format/type)");
return;
}
texObj = _mesa_lookup_texture_err(ctx, texture, "glGetTextureImage");
if (!texObj)
return;
/*
* Legal target checking has been moved here to prevent exiting with a NULL
* texImage object.
*/
if (!legal_getteximage_target(ctx, texObj->Target, true)) {
_mesa_error(ctx, GL_INVALID_ENUM, "glGetTextureImage(target=%s)",
_mesa_lookup_enum_by_nr(texObj->Target));
return;
}
/* Must handle special case GL_TEXTURE_CUBE_MAP. */
if (texObj->Target == GL_TEXTURE_CUBE_MAP) {
/* Make sure the texture object is a proper cube.
* (See texturesubimage in teximage.c for details on why this check is
* performed.)
*/
if (!_mesa_cube_level_complete(texObj, level)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glGetTextureImage(cube map incomplete)");
return;
}
/* Copy each face. */
for (i = 0; i < 6; ++i) {
texImage = texObj->Image[i][level];
assert(texImage);
_mesa_get_texture_image(ctx, texObj, texImage, texObj->Target, level,
format, type, bufSize, pixels, true);
image_stride = _mesa_image_image_stride(&ctx->Pack, texImage->Width,
texImage->Height, format,
type);
pixels = (GLubyte *) pixels + image_stride;
bufSize -= image_stride;
}
}
else {
texImage = _mesa_select_tex_image(texObj, texObj->Target, level);
if (!texImage)
return;
_mesa_get_texture_image(ctx, texObj, texImage, texObj->Target, level,
format, type, bufSize, pixels, true);
}
}
