bool
WebGLFramebuffer::AttachPoint::IsReadableFloat() const
{
TexInternalFormat internalformat = EffectiveInternalFormat();
MOZ_ASSERT(internalformat != LOCAL_GL_NONE);
TexType type = TypeFromInternalFormat(internalformat);
return type == LOCAL_GL_FLOAT ||
type == LOCAL_GL_HALF_FLOAT_OES ||
type == LOCAL_GL_HALF_FLOAT;
}
WebGLTextureFakeBlackStatus
WebGLTexture::ResolvedFakeBlackStatus()
{
if (MOZ_LIKELY(mFakeBlackStatus != WebGLTextureFakeBlackStatus::Unknown))
return mFakeBlackStatus;
// Determine if the texture needs to be faked as a black texture.
// See 3.8.2 Shader Execution in the OpenGL ES 2.0.24 spec, and 3.8.13 in
// the OpenGL ES 3.0.4 spec.
if (!IsMipmapRangeValid()) {
mFakeBlackStatus = WebGLTextureFakeBlackStatus::IncompleteTexture;
return mFakeBlackStatus;
}
for (size_t face = 0; face < mFacesCount; ++face) {
WebGLImageDataStatus status = ImageInfoAtFace(face, EffectiveBaseMipmapLevel()).mImageDataStatus;
if (status == WebGLImageDataStatus::NoImageData) {
// In case of undefined texture image, we don't print any message
// because this is a very common and often legitimate case
// (asynchronous texture loading).
mFakeBlackStatus = WebGLTextureFakeBlackStatus::IncompleteTexture;
return mFakeBlackStatus;
}
}
const char preamble[] = "A texture is going to be rendered as if it were"
" black, as per the OpenGL ES 2.0.24 spec section"
" 3.8.2, because it";
if (mTarget == LOCAL_GL_TEXTURE_2D ||
mTarget == LOCAL_GL_TEXTURE_3D)
{
int dim = mTarget == LOCAL_GL_TEXTURE_2D ? 2 : 3;
if (DoesMinFilterRequireMipmap()) {
if (!IsMipmapComplete()) {
mContext->GenerateWarning("%s is a %dD texture, with a"
" minification filter requiring a"
" mipmap, and is not mipmap complete"
" (as defined in section 3.7.10).",
preamble, dim);
mFakeBlackStatus = WebGLTextureFakeBlackStatus::IncompleteTexture;
} else if (!mContext->IsWebGL2() &&
!ImageInfoBase().IsPowerOfTwo())
{
mContext->GenerateWarning("%s is a %dD texture, with a"
" minification filter requiring a"
" mipmap, and either its width or"
" height is not a power of two.",
preamble, dim);
mFakeBlackStatus = WebGLTextureFakeBlackStatus::IncompleteTexture;
}
} else {
// No mipmap required here.
if (!ImageInfoBase().IsPositive()) {
mContext->GenerateWarning("%s is a %dD texture and its width or"
" height is equal to zero.",
preamble, dim);
mFakeBlackStatus = WebGLTextureFakeBlackStatus::IncompleteTexture;
} else if (!AreBothWrapModesClampToEdge() &&
!mContext->IsWebGL2() &&
!ImageInfoBase().IsPowerOfTwo())
{
mContext->GenerateWarning("%s is a %dD texture, with a"
" minification filter not requiring a"
" mipmap, with its width or height"
" not a power of two, and with a wrap"
" mode different from CLAMP_TO_EDGE.",
preamble, dim);
mFakeBlackStatus = WebGLTextureFakeBlackStatus::IncompleteTexture;
}
}
} else {
// Cube map
bool legalImageSize = true;
if (!mContext->IsWebGL2()) {
for (size_t face = 0; face < mFacesCount; ++face)
legalImageSize &= ImageInfoAtFace(face, 0).IsPowerOfTwo();
}
if (DoesMinFilterRequireMipmap()) {
if (!IsMipmapCubeComplete()) {
mContext->GenerateWarning("%s is a cube map texture, with a"
" minification filter requiring a"
" mipmap, and is not mipmap cube"
" complete (as defined in section"
" 3.7.10).", preamble);
mFakeBlackStatus = WebGLTextureFakeBlackStatus::IncompleteTexture;
} else if (!legalImageSize) {
mContext->GenerateWarning("%s is a cube map texture, with a"
" minification filter requiring a"
" mipmap, and either the width or the"
" height of some level 0 image is not"
" a power of two.", preamble);
mFakeBlackStatus = WebGLTextureFakeBlackStatus::IncompleteTexture;
}
}
else // no mipmap required
{
if (!IsCubeComplete()) {
mContext->GenerateWarning("%s is a cube map texture, with a"
" minification filter not requiring a"
" mipmap, and is not cube complete"
" (as defined in section 3.7.10).",
preamble);
mFakeBlackStatus = WebGLTextureFakeBlackStatus::IncompleteTexture;
} else if (!AreBothWrapModesClampToEdge() && !legalImageSize) {
mContext->GenerateWarning("%s is a cube map texture, with a"
" minification filter not requiring a"
" mipmap, with some level 0 image"
" having width or height not a power"
" of two, and with a wrap mode"
" different from CLAMP_TO_EDGE.",
preamble);
mFakeBlackStatus = WebGLTextureFakeBlackStatus::IncompleteTexture;
}
}
}
TexType type = TypeFromInternalFormat(ImageInfoBase().mEffectiveInternalFormat);
const char* badFormatText = nullptr;
const char* extText = nullptr;
if (type == LOCAL_GL_FLOAT &&
!Context()->IsExtensionEnabled(WebGLExtensionID::OES_texture_float_linear))
{
badFormatText = "FLOAT";
extText = "OES_texture_float_linear";
} else if (type == LOCAL_GL_HALF_FLOAT &&
!Context()->IsExtensionEnabled(WebGLExtensionID::OES_texture_half_float_linear))
{
badFormatText = "HALF_FLOAT";
extText = "OES_texture_half_float_linear";
}
const char* badFilterText = nullptr;
if (badFormatText) {
if (mMinFilter == LOCAL_GL_LINEAR ||
mMinFilter == LOCAL_GL_LINEAR_MIPMAP_LINEAR ||
mMinFilter == LOCAL_GL_LINEAR_MIPMAP_NEAREST ||
mMinFilter == LOCAL_GL_NEAREST_MIPMAP_LINEAR)
{
badFilterText = "minification";
} else if (mMagFilter == LOCAL_GL_LINEAR) {
badFilterText = "magnification";
}
}
if (badFilterText) {
mContext->GenerateWarning("%s is a texture with a linear %s filter,"
" which is not compatible with format %s by"
" default. Try enabling the %s extension, if"
" supported.", preamble, badFilterText,
badFormatText, extText);
mFakeBlackStatus = WebGLTextureFakeBlackStatus::IncompleteTexture;
}
// We have exhausted all cases of incomplete textures, where we would need opaque black.
// We may still need transparent black in case of uninitialized image data.
bool hasUninitializedImageData = false;
for (size_t level = 0; level <= mMaxLevelWithCustomImages; ++level) {
for (size_t face = 0; face < mFacesCount; ++face) {
bool cur = (ImageInfoAtFace(face, level).mImageDataStatus == WebGLImageDataStatus::UninitializedImageData);
hasUninitializedImageData |= cur;
}
}
if (hasUninitializedImageData) {
bool hasAnyInitializedImageData = false;
for (size_t level = 0; level <= mMaxLevelWithCustomImages; ++level) {
for (size_t face = 0; face < mFacesCount; ++face) {
if (ImageInfoAtFace(face, level).mImageDataStatus == WebGLImageDataStatus::InitializedImageData) {
hasAnyInitializedImageData = true;
break;
}
}
if (hasAnyInitializedImageData) {
break;
}
}
if (hasAnyInitializedImageData) {
/* The texture contains some initialized image data, and some
* uninitialized image data. In this case, we have no choice but to
* initialize all image data now. Fortunately, in this case we know
* that we can't be dealing with a depth texture per
* WEBGL_depth_texture and ANGLE_depth_texture (which allow only one
* image per texture) so we can assume that glTexImage2D is able to
* upload data to images.
*/
for (size_t level = 0; level <= mMaxLevelWithCustomImages; ++level)
{
for (size_t face = 0; face < mFacesCount; ++face) {
TexImageTarget imageTarget = TexImageTargetForTargetAndFace(mTarget,
face);
const ImageInfo& imageInfo = ImageInfoAt(imageTarget, level);
if (imageInfo.mImageDataStatus == WebGLImageDataStatus::UninitializedImageData)
{
EnsureInitializedImageData(imageTarget, level);
}
}
}
mFakeBlackStatus = WebGLTextureFakeBlackStatus::NotNeeded;
} else {
// The texture only contains uninitialized image data. In this case,
// we can use a black texture for it.
mFakeBlackStatus = WebGLTextureFakeBlackStatus::UninitializedImageData;
}
}
// we have exhausted all cases where we do need fakeblack, so if the status is still unknown,
// that means that we do NOT need it.
if (mFakeBlackStatus == WebGLTextureFakeBlackStatus::Unknown) {
mFakeBlackStatus = WebGLTextureFakeBlackStatus::NotNeeded;
}
MOZ_ASSERT(mFakeBlackStatus != WebGLTextureFakeBlackStatus::Unknown);
return mFakeBlackStatus;
}