void GLAPIENTRY
_mesa_CopyImageSubData(GLuint srcName, GLenum srcTarget, GLint srcLevel,
GLint srcX, GLint srcY, GLint srcZ,
GLuint dstName, GLenum dstTarget, GLint dstLevel,
GLint dstX, GLint dstY, GLint dstZ,
GLsizei srcWidth, GLsizei srcHeight, GLsizei srcDepth)
{
GET_CURRENT_CONTEXT(ctx);
GLuint tmpTexNames[2] = { 0, 0 };
struct gl_texture_object *srcTexObj, *dstTexObj;
struct gl_texture_image *srcTexImage, *dstTexImage;
GLuint src_w, src_h, dst_w, dst_h;
GLuint src_bw, src_bh, dst_bw, dst_bh;
int i;
if (MESA_VERBOSE & VERBOSE_API)
_mesa_debug(ctx, "glCopyImageSubData(%u, %s, %d, %d, %d, %d, "
"%u, %s, %d, %d, %d, %d, "
"%d, %d, %d)\n",
srcName, _mesa_enum_to_string(srcTarget), srcLevel,
srcX, srcY, srcZ,
dstName, _mesa_enum_to_string(dstTarget), dstLevel,
dstX, dstY, dstZ,
srcWidth, srcHeight, srcWidth);
if (!ctx->Extensions.ARB_copy_image) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glCopyImageSubData(extension not available)");
return;
}
if (!prepare_target(ctx, srcName, &srcTarget, srcLevel,
&srcTexObj, &srcTexImage, &tmpTexNames[0],
&src_w, &src_h, "src"))
goto cleanup;
if (!prepare_target(ctx, dstName, &dstTarget, dstLevel,
&dstTexObj, &dstTexImage, &tmpTexNames[1],
&dst_w, &dst_h, "dst"))
goto cleanup;
_mesa_get_format_block_size(srcTexImage->TexFormat, &src_bw, &src_bh);
/* Section 18.3.2 (Copying Between Images) of the OpenGL 4.5 Core Profile
* spec says:
*
* An INVALID_VALUE error is generated if the dimensions of either
* subregion exceeds the boundaries of the corresponding image object,
* or if the image format is compressed and the dimensions of the
* subregion fail to meet the alignment constraints of the format.
*
* and Section 8.7 (Compressed Texture Images) says:
*
* An INVALID_OPERATION error is generated if any of the following
* conditions occurs:
*
* * width is not a multiple of four, and width + xoffset is not
* equal to the value of TEXTURE_WIDTH.
* * height is not a multiple of four, and height + yoffset is not
* equal to the value of TEXTURE_HEIGHT.
*
* so we take that to mean that you can copy the "last" block of a
* compressed texture image even if it's smaller than the minimum block
* dimensions.
*/
if ((srcX % src_bw != 0) || (srcY % src_bh != 0) ||
(srcWidth % src_bw != 0 && (srcX + srcWidth) != src_w) ||
(srcHeight % src_bh != 0 && (srcY + srcHeight) != src_h)) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glCopyImageSubData(unaligned src rectangle)");
goto cleanup;
}
_mesa_get_format_block_size(dstTexImage->TexFormat, &dst_bw, &dst_bh);
if ((dstX % dst_bw != 0) || (dstY % dst_bh != 0)) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glCopyImageSubData(unaligned dst rectangle)");
goto cleanup;
}
if (!check_region_bounds(ctx, srcTexImage, srcX, srcY, srcZ,
srcWidth, srcHeight, srcDepth, "src"))
goto cleanup;
if (!check_region_bounds(ctx, dstTexImage, dstX, dstY, dstZ,
(srcWidth / src_bw) * dst_bw,
(srcHeight / src_bh) * dst_bh, srcDepth, "dst"))
goto cleanup;
if (!copy_format_compatible(ctx, srcTexImage->InternalFormat,
dstTexImage->InternalFormat)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glCopyImageSubData(internalFormat mismatch)");
goto cleanup;
}
for (i = 0; i < srcDepth; ++i) {
int srcNewZ, dstNewZ;
if (srcTexObj->Target == GL_TEXTURE_CUBE_MAP) {
srcTexImage = srcTexObj->Image[i + srcZ][srcLevel];
srcNewZ = 0;
} else {
srcNewZ = srcZ + i;
}
if (dstTexObj->Target == GL_TEXTURE_CUBE_MAP) {
dstTexImage = dstTexObj->Image[i + dstZ][dstLevel];
dstNewZ = 0;
} else {
dstNewZ = dstZ + i;
}
ctx->Driver.CopyImageSubData(ctx, srcTexImage, srcX, srcY, srcNewZ,
dstTexImage, dstX, dstY, dstNewZ,
srcWidth, srcHeight);
}
cleanup:
_mesa_DeleteTextures(2, tmpTexNames);
}
void GLAPIENTRY
_mesa_CopyImageSubData(GLuint srcName, GLenum srcTarget, GLint srcLevel,
GLint srcX, GLint srcY, GLint srcZ,
GLuint dstName, GLenum dstTarget, GLint dstLevel,
GLint dstX, GLint dstY, GLint dstZ,
GLsizei srcWidth, GLsizei srcHeight, GLsizei srcDepth)
{
GET_CURRENT_CONTEXT(ctx);
GLuint tmpTexNames[2] = { 0, 0 };
struct gl_texture_object *srcTexObj, *dstTexObj;
struct gl_texture_image *srcTexImage, *dstTexImage;
GLuint src_bw, src_bh, dst_bw, dst_bh;
int i;
if (MESA_VERBOSE & VERBOSE_API)
_mesa_debug(ctx, "glCopyImageSubData(%u, %s, %d, %d, %d, %d, "
"%u, %s, %d, %d, %d, %d, "
"%d, %d, %d)\n",
srcName, _mesa_lookup_enum_by_nr(srcTarget), srcLevel,
srcX, srcY, srcZ,
dstName, _mesa_lookup_enum_by_nr(dstTarget), dstLevel,
dstX, dstY, dstZ,
srcWidth, srcHeight, srcWidth);
if (!ctx->Extensions.ARB_copy_image) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glCopyImageSubData(extension not available)");
return;
}
if (!prepare_target(ctx, srcName, &srcTarget, srcLevel,
&srcTexObj, &srcTexImage, &tmpTexNames[0], "src"))
goto cleanup;
if (!prepare_target(ctx, dstName, &dstTarget, dstLevel,
&dstTexObj, &dstTexImage, &tmpTexNames[1], "dst"))
goto cleanup;
_mesa_get_format_block_size(srcTexImage->TexFormat, &src_bw, &src_bh);
if ((srcX % src_bw != 0) || (srcY % src_bh != 0) ||
(srcWidth % src_bw != 0) || (srcHeight % src_bh != 0)) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glCopyImageSubData(unaligned src rectangle)");
goto cleanup;
}
_mesa_get_format_block_size(dstTexImage->TexFormat, &dst_bw, &dst_bh);
if ((dstX % dst_bw != 0) || (dstY % dst_bh != 0)) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glCopyImageSubData(unaligned dst rectangle)");
goto cleanup;
}
if (!check_region_bounds(ctx, srcTexImage, srcX, srcY, srcZ,
srcWidth, srcHeight, srcDepth, "src"))
goto cleanup;
if (!check_region_bounds(ctx, dstTexImage, dstX, dstY, dstZ,
(srcWidth / src_bw) * dst_bw,
(srcHeight / src_bh) * dst_bh, srcDepth, "dst"))
goto cleanup;
if (!copy_format_compatible(ctx, srcTexImage->InternalFormat,
dstTexImage->InternalFormat)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glCopyImageSubData(internalFormat mismatch)");
goto cleanup;
}
for (i = 0; i < srcDepth; ++i) {
int srcNewZ, dstNewZ;
if (srcTexObj->Target == GL_TEXTURE_CUBE_MAP) {
srcTexImage = srcTexObj->Image[i + srcZ][srcLevel];
srcNewZ = 0;
} else {
srcNewZ = srcZ + i;
}
if (dstTexObj->Target == GL_TEXTURE_CUBE_MAP) {
dstTexImage = dstTexObj->Image[i + dstZ][dstLevel];
dstNewZ = 0;
} else {
dstNewZ = dstZ + i;
}
ctx->Driver.CopyImageSubData(ctx, srcTexImage, srcX, srcY, srcNewZ,
dstTexImage, dstX, dstY, dstNewZ,
srcWidth, srcHeight);
}
cleanup:
_mesa_DeleteTextures(2, tmpTexNames);
}
void GLAPIENTRY
_mesa_CopyImageSubData(GLuint srcName, GLenum srcTarget, GLint srcLevel,
GLint srcX, GLint srcY, GLint srcZ,
GLuint dstName, GLenum dstTarget, GLint dstLevel,
GLint dstX, GLint dstY, GLint dstZ,
GLsizei srcWidth, GLsizei srcHeight, GLsizei srcDepth)
{
GET_CURRENT_CONTEXT(ctx);
struct gl_texture_image *srcTexImage, *dstTexImage;
struct gl_renderbuffer *srcRenderbuffer, *dstRenderbuffer;
mesa_format srcFormat, dstFormat;
GLenum srcIntFormat, dstIntFormat;
GLuint src_w, src_h, dst_w, dst_h;
GLuint src_bw, src_bh, dst_bw, dst_bh;
GLuint src_num_samples, dst_num_samples;
int dstWidth, dstHeight, dstDepth;
int i;
if (MESA_VERBOSE & VERBOSE_API)
_mesa_debug(ctx, "glCopyImageSubData(%u, %s, %d, %d, %d, %d, "
"%u, %s, %d, %d, %d, %d, "
"%d, %d, %d)\n",
srcName, _mesa_enum_to_string(srcTarget), srcLevel,
srcX, srcY, srcZ,
dstName, _mesa_enum_to_string(dstTarget), dstLevel,
dstX, dstY, dstZ,
srcWidth, srcHeight, srcDepth);
if (!ctx->Extensions.ARB_copy_image) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glCopyImageSubData(extension not available)");
return;
}
if (!prepare_target(ctx, srcName, srcTarget, srcLevel, srcZ, srcDepth,
&srcTexImage, &srcRenderbuffer, &srcFormat,
&srcIntFormat, &src_w, &src_h, &src_num_samples, "src"))
return;
if (!prepare_target(ctx, dstName, dstTarget, dstLevel, dstZ, srcDepth,
&dstTexImage, &dstRenderbuffer, &dstFormat,
&dstIntFormat, &dst_w, &dst_h, &dst_num_samples, "dst"))
return;
_mesa_get_format_block_size(srcFormat, &src_bw, &src_bh);
/* Section 18.3.2 (Copying Between Images) of the OpenGL 4.5 Core Profile
* spec says:
*
* An INVALID_VALUE error is generated if the dimensions of either
* subregion exceeds the boundaries of the corresponding image object,
* or if the image format is compressed and the dimensions of the
* subregion fail to meet the alignment constraints of the format.
*
* and Section 8.7 (Compressed Texture Images) says:
*
* An INVALID_OPERATION error is generated if any of the following
* conditions occurs:
*
* * width is not a multiple of four, and width + xoffset is not
* equal to the value of TEXTURE_WIDTH.
* * height is not a multiple of four, and height + yoffset is not
* equal to the value of TEXTURE_HEIGHT.
*
* so we take that to mean that you can copy the "last" block of a
* compressed texture image even if it's smaller than the minimum block
* dimensions.
*/
if ((srcX % src_bw != 0) || (srcY % src_bh != 0) ||
(srcWidth % src_bw != 0 && (srcX + srcWidth) != src_w) ||
(srcHeight % src_bh != 0 && (srcY + srcHeight) != src_h)) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glCopyImageSubData(unaligned src rectangle)");
return;
}
_mesa_get_format_block_size(dstFormat, &dst_bw, &dst_bh);
if ((dstX % dst_bw != 0) || (dstY % dst_bh != 0)) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glCopyImageSubData(unaligned dst rectangle)");
return;
}
/* From the GL_ARB_copy_image spec:
*
* "The dimensions are always specified in texels, even for compressed
* texture formats. But it should be noted that if only one of the
* source and destination textures is compressed then the number of
* texels touched in the compressed image will be a factor of the
* block size larger than in the uncompressed image."
*
* So, if copying from compressed to uncompressed, the dest region is
* shrunk by the src block size factor. If copying from uncompressed
* to compressed, the dest region is grown by the dest block size factor.
* Note that we're passed the _source_ width, height, depth and those
* dimensions are never changed.
*/
dstWidth = srcWidth * dst_bw / src_bw;
dstHeight = srcHeight * dst_bh / src_bh;
dstDepth = srcDepth;
if (!check_region_bounds(ctx, srcTarget, srcTexImage, srcRenderbuffer,
srcX, srcY, srcZ, srcWidth, srcHeight, srcDepth,
"src"))
return;
if (!check_region_bounds(ctx, dstTarget, dstTexImage, dstRenderbuffer,
dstX, dstY, dstZ, dstWidth, dstHeight, dstDepth,
"dst"))
return;
/* Section 18.3.2 (Copying Between Images) of the OpenGL 4.5 Core Profile
* spec says:
*
* An INVALID_OPERATION error is generated if either object is a texture
* and the texture is not complete, if the source and destination internal
* formats are not compatible, or if the number of samples do not match.
*/
if (!copy_format_compatible(ctx, srcIntFormat, dstIntFormat)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glCopyImageSubData(internalFormat mismatch)");
return;
}
if (src_num_samples != dst_num_samples) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glCopyImageSubData(number of samples mismatch)");
return;
}
/* loop over 2D slices/faces/layers */
for (i = 0; i < srcDepth; ++i) {
int newSrcZ = srcZ + i;
int newDstZ = dstZ + i;
if (srcTexImage &&
srcTexImage->TexObject->Target == GL_TEXTURE_CUBE_MAP) {
/* need to update srcTexImage pointer for the cube face */
assert(srcZ + i < MAX_FACES);
srcTexImage = srcTexImage->TexObject->Image[srcZ + i][srcLevel];
assert(srcTexImage);
newSrcZ = 0;
}
if (dstTexImage &&
dstTexImage->TexObject->Target == GL_TEXTURE_CUBE_MAP) {
/* need to update dstTexImage pointer for the cube face */
assert(dstZ + i < MAX_FACES);
dstTexImage = dstTexImage->TexObject->Image[dstZ + i][dstLevel];
assert(dstTexImage);
newDstZ = 0;
}
ctx->Driver.CopyImageSubData(ctx,
srcTexImage, srcRenderbuffer,
srcX, srcY, newSrcZ,
dstTexImage, dstRenderbuffer,
dstX, dstY, newDstZ,
srcWidth, srcHeight);
}
}