static bool
copy_format_compatible(const struct gl_context *ctx,
GLenum srcFormat, GLenum dstFormat)
{
/*
* From ARB_copy_image spec:
* For the purposes of CopyImageSubData, two internal formats
* are considered compatible if any of the following conditions are
* met:
* * the formats are the same,
* * the formats are considered compatible according to the
* compatibility rules used for texture views as defined in
* section 3.9.X. In particular, if both internal formats are listed
* in the same entry of Table 3.X.2, they are considered compatible, or
* * one format is compressed and the other is uncompressed and
* Table 4.X.1 lists the two formats in the same row.
*/
if (_mesa_texture_view_compatible_format(ctx, srcFormat, dstFormat)) {
/* Also checks if formats are equal. */
return true;
} else if (_mesa_is_compressed_format(ctx, srcFormat)) {
return compressed_format_compatible(ctx, srcFormat, dstFormat);
} else if (_mesa_is_compressed_format(ctx, dstFormat)) {
return compressed_format_compatible(ctx, dstFormat, srcFormat);
}
return false;
}
/**
* glTextureView (ARB_texture_view)
* If an error is found, record it with _mesa_error()
* \return none.
*/
void GLAPIENTRY
_mesa_TextureView(GLuint texture, GLenum target, GLuint origtexture,
GLenum internalformat,
GLuint minlevel, GLuint numlevels,
GLuint minlayer, GLuint numlayers)
{
struct gl_texture_object *texObj;
struct gl_texture_object *origTexObj;
struct gl_texture_image *origTexImage;
GLuint newViewMinLevel, newViewMinLayer;
GLuint newViewNumLevels, newViewNumLayers;
GLsizei width, height, depth;
mesa_format texFormat;
GLboolean sizeOK, dimensionsOK;
GLenum faceTarget;
GET_CURRENT_CONTEXT(ctx);
if (MESA_VERBOSE & (VERBOSE_API | VERBOSE_TEXTURE))
_mesa_debug(ctx, "glTextureView %d %s %d %s %d %d %d %d\n",
texture, _mesa_lookup_enum_by_nr(target), origtexture,
_mesa_lookup_enum_by_nr(internalformat),
minlevel, numlevels, minlayer, numlayers);
if (origtexture == 0) {
_mesa_error(ctx, GL_INVALID_VALUE, "glTextureView(origtexture = %u)", origtexture);
return;
}
/* Need original texture information to validate arguments */
origTexObj = _mesa_lookup_texture(ctx, origtexture);
/* If <origtexture> is not the name of a texture, INVALID_VALUE is generated. */
if (!origTexObj) {
_mesa_error(ctx, GL_INVALID_VALUE, "glTextureView(origtexture = %u)", origtexture);
return;
}
/* If <origtexture>'s TEXTURE_IMMUTABLE_FORMAT value is not TRUE,
* INVALID_OPERATION is generated.
*/
if (!origTexObj->Immutable) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glTextureView(origtexture not immutable)");
return;
}
/* If <texture> is 0, INVALID_VALUE is generated. */
if (texture == 0) {
_mesa_error(ctx, GL_INVALID_VALUE, "glTextureView(texture = 0)");
return;
}
/* If <texture> is not a valid name returned by GenTextures,
* the error INVALID_OPERATION is generated.
*/
texObj = _mesa_lookup_texture(ctx, texture);
if (texObj == NULL) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glTextureView(texture = %u non-gen name)", texture);
return;
}
/* If <texture> has already been bound and given a target, then
* the error INVALID_OPERATION is generated.
*/
if (texObj->Target) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glTextureView(texture = %u already bound)", texture);
return;
}
/* Check for compatible target */
if (!target_valid(ctx, origTexObj->Target, target)) {
return; /* error was recorded */
}
/* minlevel and minlayer are relative to the view of origtexture
* If minlevel or minlayer is greater than level or layer, respectively,
* of origtexture return INVALID_VALUE.
*/
newViewMinLevel = origTexObj->MinLevel + minlevel;
newViewMinLayer = origTexObj->MinLayer + minlayer;
if (newViewMinLevel >= (origTexObj->MinLevel + origTexObj->NumLevels)) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glTextureView(new minlevel (%d) > orig minlevel (%d) + orig numlevels (%d))",
newViewMinLevel, origTexObj->MinLevel, origTexObj->NumLevels);
return;
}
if (newViewMinLayer >= (origTexObj->MinLayer + origTexObj->NumLayers)) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glTextureView(new minlayer (%d) > orig minlayer (%d) + orig numlayers (%d))",
newViewMinLayer, origTexObj->MinLayer, origTexObj->NumLayers);
return;
}
if (!_mesa_texture_view_compatible_format(ctx,
origTexObj->Image[0][0]->InternalFormat,
internalformat)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glTextureView(internalformat %s not compatible with origtexture %s)",
_mesa_lookup_enum_by_nr(internalformat),
_mesa_lookup_enum_by_nr(origTexObj->Image[0][0]->InternalFormat));
return;
}
texFormat = _mesa_choose_texture_format(ctx, texObj, target, 0,
internalformat, GL_NONE, GL_NONE);
assert(texFormat != MESA_FORMAT_NONE);
if (texFormat == MESA_FORMAT_NONE) return;
newViewNumLevels = MIN2(numlevels, origTexObj->NumLevels - minlevel);
newViewNumLayers = MIN2(numlayers, origTexObj->NumLayers - minlayer);
faceTarget = origTexObj->Target;
if (faceTarget == GL_TEXTURE_CUBE_MAP)
faceTarget = GL_TEXTURE_CUBE_MAP_POSITIVE_X + minlayer;
/* Get a reference to what will become this View's base level */
origTexImage = _mesa_select_tex_image(origTexObj, faceTarget, minlevel);
width = origTexImage->Width;
height = origTexImage->Height;
depth = origTexImage->Depth;
/* Adjust width, height, depth to be appropriate for new target */
switch (target) {
case GL_TEXTURE_1D:
height = 1;
break;
case GL_TEXTURE_3D:
break;
case GL_TEXTURE_1D_ARRAY:
height = (GLsizei) newViewNumLayers;
break;
case GL_TEXTURE_2D:
case GL_TEXTURE_2D_MULTISAMPLE:
case GL_TEXTURE_RECTANGLE:
case GL_TEXTURE_CUBE_MAP:
depth = 1;
break;
case GL_TEXTURE_2D_ARRAY:
case GL_TEXTURE_CUBE_MAP_ARRAY:
case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
depth = newViewNumLayers;
break;
}
/* If the dimensions of the original texture are larger than the maximum
* supported dimensions of the new target, the error INVALID_OPERATION is
* generated. For example, if the original texture has a TEXTURE_2D_ARRAY
* target and its width is greater than MAX_CUBE_MAP_TEXTURE_SIZE, an error
* will be generated if TextureView is called to create a TEXTURE_CUBE_MAP
* view.
*/
dimensionsOK = _mesa_legal_texture_dimensions(ctx, target, 0,
width, height, depth, 0);
if (!dimensionsOK) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glTextureView(invalid width or height or depth)");
return;
}
sizeOK = ctx->Driver.TestProxyTexImage(ctx, target, 0, texFormat,
width, height, depth, 0);
if (!sizeOK) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glTextureView(invalid texture size)");
return;
}
/* If <target> is TEXTURE_1D, TEXTURE_2D, TEXTURE_3D, TEXTURE_RECTANGLE,
* or TEXTURE_2D_MULTISAMPLE and <numlayers> does not equal 1, the error
* INVALID_VALUE is generated.
*/
switch (target) {
case GL_TEXTURE_1D:
case GL_TEXTURE_2D:
case GL_TEXTURE_3D:
case GL_TEXTURE_RECTANGLE:
case GL_TEXTURE_2D_MULTISAMPLE:
if (numlayers != 1) {
_mesa_error(ctx, GL_INVALID_VALUE, "glTextureView(numlayers %d != 1)", numlayers);
return;
}
break;
case GL_TEXTURE_CUBE_MAP:
/* If the new texture's target is TEXTURE_CUBE_MAP, the clamped <numlayers>
* must be equal to 6.
*/
if (newViewNumLayers != 6) {
_mesa_error(ctx, GL_INVALID_VALUE, "glTextureView(clamped numlayers %d != 6)",
newViewNumLayers);
return;
}
break;
case GL_TEXTURE_CUBE_MAP_ARRAY:
/* If the new texture's target is TEXTURE_CUBE_MAP_ARRAY,
* then <numlayers> counts layer-faces rather than layers,
* and the clamped <numlayers> must be a multiple of 6.
* Otherwise, the error INVALID_VALUE is generated.
*/
if ((newViewNumLayers % 6) != 0) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glTextureView(clamped numlayers %d is not a multiple of 6)",
newViewNumLayers);
return;
}
break;
}
/* If the new texture's target is TEXTURE_CUBE_MAP or
* TEXTURE_CUBE_MAP_ARRAY, the width and height of the original texture's
* levels must be equal otherwise the error INVALID_OPERATION is generated.
*/
if ((target == GL_TEXTURE_CUBE_MAP || target == GL_TEXTURE_CUBE_MAP_ARRAY) &&
(origTexImage->Width != origTexImage->Height)) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glTextureView(origtexture width (%d) != height (%d))",
origTexImage->Width, origTexImage->Height);
return;
}
/* When the original texture's target is TEXTURE_CUBE_MAP, the layer
* parameters are interpreted in the same order as if it were a
* TEXTURE_CUBE_MAP_ARRAY with 6 layer-faces.
*/
/* If the internal format does not exactly match the internal format of the
* original texture, the contents of the memory are reinterpreted in the
* same manner as for image bindings described in
* section 3.9.20 (Texture Image Loads and Stores).
*/
/* TEXTURE_BASE_LEVEL and TEXTURE_MAX_LEVEL are interpreted
* relative to the view and not relative to the original data store.
*/
if (!initialize_texture_fields(ctx, target, texObj, newViewNumLevels,
width, height, depth,
internalformat, texFormat)) {
return; /* Already recorded error */
}
texObj->MinLevel = newViewMinLevel;
texObj->MinLayer = newViewMinLayer;
texObj->NumLevels = newViewNumLevels;
texObj->NumLayers = newViewNumLayers;
texObj->Immutable = GL_TRUE;
texObj->ImmutableLevels = origTexObj->ImmutableLevels;
texObj->Target = target;
if (ctx->Driver.TextureView != NULL && !ctx->Driver.TextureView(ctx, texObj, origTexObj)) {
return; /* driver recorded error */
}
}
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, srcNewZ, dstNewZ, Bpt;
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;
}
/* Very simple sanity check. This is sufficient if one of the textures
* is compressed. */
Bpt = _mesa_get_format_bytes(srcTexImage->TexFormat);
if (_mesa_get_format_bytes(dstTexImage->TexFormat) != Bpt) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glCopyImageSubData(internalFormat mismatch)");
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 (_mesa_is_format_compressed(srcTexImage->TexFormat)) {
/* XXX: Technically, we should probaby do some more specific checking
* here. However, this should be sufficient for all compressed
* formats that mesa supports since it is a direct memory copy.
*/
} else if (_mesa_is_format_compressed(dstTexImage->TexFormat)) {
} else if (_mesa_texture_view_compatible_format(ctx,
srcTexImage->InternalFormat,
dstTexImage->InternalFormat)) {
} else {
return; /* Error logged by _mesa_texture_view_compatible_format */
}
for (i = 0; i < srcDepth; ++i) {
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);
}
