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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "WebGLTexture.h"
#include <algorithm>
#include <limits>
#include "CanvasUtils.h"
#include "ClientWebGLContext.h"
#include "GLBlitHelper.h"
#include "GLContext.h"
#include "mozilla/Casting.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/gfx/Logging.h"
#include "mozilla/dom/HTMLCanvasElement.h"
#include "mozilla/dom/HTMLVideoElement.h"
#include "mozilla/dom/ImageBitmap.h"
#include "mozilla/dom/ImageData.h"
#include "mozilla/MathAlgorithms.h"
#include "mozilla/Scoped.h"
#include "mozilla/ScopeExit.h"
#include "mozilla/StaticPrefs_webgl.h"
#include "mozilla/Unused.h"
#include "nsLayoutUtils.h"
#include "ScopedGLHelpers.h"
#include "TexUnpackBlob.h"
#include "WebGLBuffer.h"
#include "WebGLContext.h"
#include "WebGLContextUtils.h"
#include "WebGLFramebuffer.h"
#include "WebGLTexelConversions.h"
namespace mozilla {
namespace webgl {
Maybe<TexUnpackBlobDesc> FromImageBitmap(const GLenum target, uvec3 size,
const dom::ImageBitmap& imageBitmap,
ErrorResult* const out_rv) {
if (imageBitmap.IsWriteOnly()) {
out_rv->Throw(NS_ERROR_DOM_SECURITY_ERR);
return {};
}
const auto cloneData = imageBitmap.ToCloneData();
if (!cloneData) {
return {};
}
const RefPtr<gfx::DataSourceSurface> surf = cloneData->mSurface;
const auto imageSize = *uvec2::FromSize(surf->GetSize());
if (!size.x) {
size.x = imageSize.x;
}
if (!size.y) {
size.y = imageSize.y;
}
// WhatWG "HTML Living Standard" (30 October 2015):
// "The getImageData(sx, sy, sw, sh) method [...] Pixels must be returned as
// non-premultiplied alpha values."
return Some(TexUnpackBlobDesc{target,
size,
cloneData->mAlphaType,
{},
{},
imageSize,
nullptr,
{},
surf,
{},
false});
}
TexUnpackBlobDesc FromImageData(const GLenum target, uvec3 size,
const dom::ImageData& imageData,
dom::Uint8ClampedArray* const scopedArr) {
MOZ_RELEASE_ASSERT(scopedArr->Init(imageData.GetDataObject()));
scopedArr->ComputeState();
const size_t dataSize = scopedArr->Length();
const auto data = reinterpret_cast<uint8_t*>(scopedArr->Data());
const gfx::IntSize imageISize(imageData.Width(), imageData.Height());
const auto imageUSize = *uvec2::FromSize(imageISize);
const size_t stride = imageUSize.x * 4;
const gfx::SurfaceFormat surfFormat = gfx::SurfaceFormat::R8G8B8A8;
MOZ_ALWAYS_TRUE(dataSize == stride * imageUSize.y);
const RefPtr<gfx::DataSourceSurface> surf =
gfx::Factory::CreateWrappingDataSourceSurface(data, stride, imageISize,
surfFormat);
MOZ_ASSERT(surf);
////
if (!size.x) {
size.x = imageUSize.x;
}
if (!size.y) {
size.y = imageUSize.y;
}
////
// WhatWG "HTML Living Standard" (30 October 2015):
// "The getImageData(sx, sy, sw, sh) method [...] Pixels must be returned as
// non-premultiplied alpha values."
return {target, size, gfxAlphaType::NonPremult, {}, {}, imageUSize, nullptr,
{}, surf};
}
static layers::SurfaceDescriptor Flatten(const layers::SurfaceDescriptor& sd) {
const auto sdType = sd.type();
if (sdType != layers::SurfaceDescriptor::TSurfaceDescriptorGPUVideo) {
return sd;
}
const auto& sdv = sd.get_SurfaceDescriptorGPUVideo();
const auto& sdvType = sdv.type();
if (sdvType !=
layers::SurfaceDescriptorGPUVideo::TSurfaceDescriptorRemoteDecoder) {
return sd;
}
const auto& sdrd = sdv.get_SurfaceDescriptorRemoteDecoder();
const auto& subdesc = sdrd.subdesc();
const auto& subdescType = subdesc.type();
switch (subdescType) {
case layers::RemoteDecoderVideoSubDescriptor::T__None:
case layers::RemoteDecoderVideoSubDescriptor::Tnull_t:
return sd;
case layers::RemoteDecoderVideoSubDescriptor::TSurfaceDescriptorD3D10:
return subdesc.get_SurfaceDescriptorD3D10();
case layers::RemoteDecoderVideoSubDescriptor::TSurfaceDescriptorDXGIYCbCr:
return subdesc.get_SurfaceDescriptorDXGIYCbCr();
case layers::RemoteDecoderVideoSubDescriptor::TSurfaceDescriptorDMABuf:
return subdesc.get_SurfaceDescriptorDMABuf();
case layers::RemoteDecoderVideoSubDescriptor::
TSurfaceDescriptorMacIOSurface:
return subdesc.get_SurfaceDescriptorMacIOSurface();
}
MOZ_CRASH("unreachable");
}
Maybe<webgl::TexUnpackBlobDesc> FromDomElem(const ClientWebGLContext& webgl,
const GLenum target, uvec3 size,
const dom::Element& elem,
ErrorResult* const out_error) {
const auto& canvas = *webgl.GetCanvas();
if (elem.IsHTMLElement(nsGkAtoms::canvas)) {
const dom::HTMLCanvasElement* srcCanvas =
static_cast<const dom::HTMLCanvasElement*>(&elem);
if (srcCanvas->IsWriteOnly()) {
out_error->Throw(NS_ERROR_DOM_SECURITY_ERR);
return {};
}
}
// The canvas spec says that drawImage should draw the first frame of
// animated images. The webgl spec doesn't mention the issue, so we do the
// same as drawImage.
uint32_t flags = nsLayoutUtils::SFE_WANT_FIRST_FRAME_IF_IMAGE |
nsLayoutUtils::SFE_USE_ELEMENT_SIZE_IF_VECTOR |
nsLayoutUtils::SFE_EXACT_SIZE_SURFACE |
nsLayoutUtils::SFE_ALLOW_NON_PREMULT;
const auto& unpacking = webgl.State().mPixelUnpackState;
if (unpacking.mColorspaceConversion == LOCAL_GL_NONE) {
flags |= nsLayoutUtils::SFE_NO_COLORSPACE_CONVERSION;
}
RefPtr<gfx::DrawTarget> idealDrawTarget = nullptr; // Don't care for now.
auto sfer = nsLayoutUtils::SurfaceFromElement(
const_cast<dom::Element*>(&elem), flags, idealDrawTarget);
//////
uvec2 elemSize;
const auto& layersImage = sfer.mLayersImage;
Maybe<layers::SurfaceDescriptor> sd;
if (layersImage) {
elemSize = *uvec2::FromSize(layersImage->GetSize());
sd = layersImage->GetDesc();
if (sd) {
sd = Some(Flatten(*sd));
}
if (!sd) {
NS_WARNING("No SurfaceDescriptor for layers::Image!");
}
}
RefPtr<gfx::DataSourceSurface> dataSurf;
if (!sd && sfer.GetSourceSurface()) {
const auto surf = sfer.GetSourceSurface();
elemSize = *uvec2::FromSize(surf->GetSize());
// WARNING: OSX can lose our MakeCurrent here.
dataSurf = surf->GetDataSurface();
}
//////
if (!size.x) {
size.x = elemSize.x;
}
if (!size.y) {
size.y = elemSize.y;
}
////
if (!sd && !dataSurf) {
webgl.EnqueueWarning("Resource has no data (yet?). Uploading zeros.");
return Some(TexUnpackBlobDesc{target, size, gfxAlphaType::NonPremult});
}
//////
// While it's counter-intuitive, the shape of the SFEResult API means that we
// should try to pull out a surface first, and then, if we do pull out a
// surface, check CORS/write-only/etc..
if (!sfer.mCORSUsed) {
auto& srcPrincipal = sfer.mPrincipal;
nsIPrincipal* dstPrincipal = canvas.NodePrincipal();
if (!dstPrincipal->Subsumes(srcPrincipal)) {
webgl.EnqueueWarning("Cross-origin elements require CORS.");
out_error->Throw(NS_ERROR_DOM_SECURITY_ERR);
return {};
}
}
if (sfer.mIsWriteOnly) {
// mIsWriteOnly defaults to true, and so will be true even if SFE merely
// failed. Thus we must test mIsWriteOnly after successfully retrieving an
// Image or SourceSurface.
webgl.EnqueueWarning("Element is write-only, thus cannot be uploaded.");
out_error->Throw(NS_ERROR_DOM_SECURITY_ERR);
return {};
}
//////
// Ok, we're good!
return Some(TexUnpackBlobDesc{target,
size,
sfer.mAlphaType,
{},
{},
elemSize,
layersImage,
sd,
dataSurf});
}
} // namespace webgl
//////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////
static bool ValidateTexImage(WebGLContext* webgl, WebGLTexture* texture,
TexImageTarget target, uint32_t level,
webgl::ImageInfo** const out_imageInfo) {
// Check level
if (level >= WebGLTexture::kMaxLevelCount) {
webgl->ErrorInvalidValue("`level` is too large.");
return false;
}
auto& imageInfo = texture->ImageInfoAt(target, level);
*out_imageInfo = &imageInfo;
return true;
}
// For *TexImage*
bool WebGLTexture::ValidateTexImageSpecification(
TexImageTarget target, uint32_t level, const uvec3& size,
webgl::ImageInfo** const out_imageInfo) {
if (mImmutable) {
mContext->ErrorInvalidOperation("Specified texture is immutable.");
return false;
}
// Do this early to validate `level`.
webgl::ImageInfo* imageInfo;
if (!ValidateTexImage(mContext, this, target, level, &imageInfo))
return false;
if (mTarget == LOCAL_GL_TEXTURE_CUBE_MAP && size.x != size.y) {
mContext->ErrorInvalidValue("Cube map images must be square.");
return false;
}
/* GLES 3.0.4, p133-134:
* GL_MAX_TEXTURE_SIZE is *not* the max allowed texture size. Rather, it is
* the max (width/height) size guaranteed not to generate an INVALID_VALUE for
* too-large dimensions. Sizes larger than GL_MAX_TEXTURE_SIZE *may or may
* not* result in an INVALID_VALUE, or possibly GL_OOM.
*
* However, we have needed to set our maximums lower in the past to prevent
* resource corruption. Therefore we have limits.maxTex2dSize, which is
* neither necessarily lower nor higher than MAX_TEXTURE_SIZE.
*
* Note that limits.maxTex2dSize must be >= than the advertized
* MAX_TEXTURE_SIZE. For simplicity, we advertize MAX_TEXTURE_SIZE as
* limits.maxTex2dSize.
*/
uint32_t maxWidthHeight = 0;
uint32_t maxDepth = 0;
uint32_t maxLevel = 0;
const auto& limits = mContext->Limits();
MOZ_ASSERT(level <= 31);
switch (target.get()) {
case LOCAL_GL_TEXTURE_2D:
maxWidthHeight = limits.maxTex2dSize >> level;
maxDepth = 1;
maxLevel = CeilingLog2(limits.maxTex2dSize);
break;
case LOCAL_GL_TEXTURE_3D:
maxWidthHeight = limits.maxTex3dSize >> level;
maxDepth = maxWidthHeight;
maxLevel = CeilingLog2(limits.maxTex3dSize);
break;
case LOCAL_GL_TEXTURE_2D_ARRAY:
maxWidthHeight = limits.maxTex2dSize >> level;
// "The maximum number of layers for two-dimensional array textures
// (depth) must be at least MAX_ARRAY_TEXTURE_LAYERS for all levels."
maxDepth = limits.maxTexArrayLayers;
maxLevel = CeilingLog2(limits.maxTex2dSize);
break;
default: // cube maps
MOZ_ASSERT(IsCubeMap());
maxWidthHeight = limits.maxTexCubeSize >> level;
maxDepth = 1;
maxLevel = CeilingLog2(limits.maxTexCubeSize);
break;
}
if (level > maxLevel) {
mContext->ErrorInvalidValue("Requested level is not supported for target.");
return false;
}
if (size.x > maxWidthHeight || size.y > maxWidthHeight || size.z > maxDepth) {
mContext->ErrorInvalidValue("Requested size at this level is unsupported.");
return false;
}
{
/* GL ES Version 2.0.25 - 3.7.1 Texture Image Specification
* "If level is greater than zero, and either width or
* height is not a power-of-two, the error INVALID_VALUE is
* generated."
*
* This restriction does not apply to GL ES Version 3.0+.
*/
bool requirePOT = (!mContext->IsWebGL2() && level != 0);
if (requirePOT) {
if (!IsPowerOfTwo(size.x) || !IsPowerOfTwo(size.y)) {
mContext->ErrorInvalidValue(
"For level > 0, width and height must be"
" powers of two.");
return false;
}
}
}
*out_imageInfo = imageInfo;
return true;
}
// For *TexSubImage*
bool WebGLTexture::ValidateTexImageSelection(
TexImageTarget target, uint32_t level, const uvec3& offset,
const uvec3& size, webgl::ImageInfo** const out_imageInfo) {
webgl::ImageInfo* imageInfo;
if (!ValidateTexImage(mContext, this, target, level, &imageInfo))
return false;
if (!imageInfo->IsDefined()) {
mContext->ErrorInvalidOperation(
"The specified TexImage has not yet been"
" specified.");
return false;
}
const auto totalX = CheckedUint32(offset.x) + size.x;
const auto totalY = CheckedUint32(offset.y) + size.y;
const auto totalZ = CheckedUint32(offset.z) + size.z;
if (!totalX.isValid() || totalX.value() > imageInfo->mWidth ||
!totalY.isValid() || totalY.value() > imageInfo->mHeight ||
!totalZ.isValid() || totalZ.value() > imageInfo->mDepth) {
mContext->ErrorInvalidValue(
"Offset+size must be <= the size of the existing"
" specified image.");
return false;
}
*out_imageInfo = imageInfo;
return true;
}
static bool ValidateCompressedTexUnpack(WebGLContext* webgl, const uvec3& size,
const webgl::FormatInfo* format,
size_t dataSize) {
auto compression = format->compression;
auto bytesPerBlock = compression->bytesPerBlock;
auto blockWidth = compression->blockWidth;
auto blockHeight = compression->blockHeight;
auto widthInBlocks = CheckedUint32(size.x) / blockWidth;
auto heightInBlocks = CheckedUint32(size.y) / blockHeight;
if (size.x % blockWidth) widthInBlocks += 1;
if (size.y % blockHeight) heightInBlocks += 1;
const CheckedUint32 blocksPerImage = widthInBlocks * heightInBlocks;
const CheckedUint32 bytesPerImage = bytesPerBlock * blocksPerImage;
const CheckedUint32 bytesNeeded = bytesPerImage * size.z;
if (!bytesNeeded.isValid()) {
webgl->ErrorOutOfMemory("Overflow while computing the needed buffer size.");
return false;
}
if (dataSize != bytesNeeded.value()) {
webgl->ErrorInvalidValue(
"Provided buffer's size must match expected size."
" (needs %u, has %zu)",
bytesNeeded.value(), dataSize);
return false;
}
return true;
}
static bool DoChannelsMatchForCopyTexImage(const webgl::FormatInfo* srcFormat,
const webgl::FormatInfo* dstFormat) {
// GLES 3.0.4 p140 Table 3.16 "Valid CopyTexImage source
// framebuffer/destination texture base internal format combinations."
switch (srcFormat->unsizedFormat) {
case webgl::UnsizedFormat::RGBA:
switch (dstFormat->unsizedFormat) {
case webgl::UnsizedFormat::A:
case webgl::UnsizedFormat::L:
case webgl::UnsizedFormat::LA:
case webgl::UnsizedFormat::R:
case webgl::UnsizedFormat::RG:
case webgl::UnsizedFormat::RGB:
case webgl::UnsizedFormat::RGBA:
return true;
default:
return false;
}
case webgl::UnsizedFormat::RGB:
switch (dstFormat->unsizedFormat) {
case webgl::UnsizedFormat::L:
case webgl::UnsizedFormat::R:
case webgl::UnsizedFormat::RG:
case webgl::UnsizedFormat::RGB:
return true;
default:
return false;
}
case webgl::UnsizedFormat::RG:
switch (dstFormat->unsizedFormat) {
case webgl::UnsizedFormat::L:
case webgl::UnsizedFormat::R:
case webgl::UnsizedFormat::RG:
return true;
default:
return false;
}
case webgl::UnsizedFormat::R:
switch (dstFormat->unsizedFormat) {
case webgl::UnsizedFormat::L:
case webgl::UnsizedFormat::R:
return true;
default:
return false;
}
default:
return false;
}
}
static bool EnsureImageDataInitializedForUpload(
WebGLTexture* tex, TexImageTarget target, uint32_t level,
const uvec3& offset, const uvec3& size, webgl::ImageInfo* imageInfo,
bool* const out_expectsInit = nullptr) {
if (out_expectsInit) {
*out_expectsInit = false;
}
if (!imageInfo->mUninitializedSlices) return true;
if (size.x == imageInfo->mWidth && size.y == imageInfo->mHeight) {
bool expectsInit = false;
auto& isSliceUninit = *imageInfo->mUninitializedSlices;
for (const auto z : IntegerRange(offset.z, offset.z + size.z)) {
if (!isSliceUninit[z]) continue;
expectsInit = true;
isSliceUninit[z] = false;
}
if (out_expectsInit) {
*out_expectsInit = expectsInit;
}
if (!expectsInit) return true;
bool hasUninitialized = false;
for (const auto z : IntegerRange(imageInfo->mDepth)) {
hasUninitialized |= isSliceUninit[z];
}
if (!hasUninitialized) {
imageInfo->mUninitializedSlices = Nothing();
}
return true;
}
WebGLContext* webgl = tex->mContext;
webgl->GenerateWarning(
"Texture has not been initialized prior to a"
" partial upload, forcing the browser to clear it."
" This may be slow.");
if (!tex->EnsureImageDataInitialized(target, level)) {
MOZ_ASSERT(false, "Unexpected failure to init image data.");
return false;
}
return true;
}
//////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////
// Actual calls
static inline GLenum DoTexStorage(gl::GLContext* gl, TexTarget target,
GLsizei levels, GLenum sizedFormat,
GLsizei width, GLsizei height,
GLsizei depth) {
gl::GLContext::LocalErrorScope errorScope(*gl);
switch (target.get()) {
case LOCAL_GL_TEXTURE_2D:
case LOCAL_GL_TEXTURE_CUBE_MAP:
MOZ_ASSERT(depth == 1);
gl->fTexStorage2D(target.get(), levels, sizedFormat, width, height);
break;
case LOCAL_GL_TEXTURE_3D:
case LOCAL_GL_TEXTURE_2D_ARRAY:
gl->fTexStorage3D(target.get(), levels, sizedFormat, width, height,
depth);
break;
default:
MOZ_CRASH("GFX: bad target");
}
return errorScope.GetError();
}
bool IsTarget3D(TexImageTarget target) {
switch (target.get()) {
case LOCAL_GL_TEXTURE_2D:
case LOCAL_GL_TEXTURE_CUBE_MAP_POSITIVE_X:
case LOCAL_GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
case LOCAL_GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
case LOCAL_GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
case LOCAL_GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
case LOCAL_GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
return false;
case LOCAL_GL_TEXTURE_3D:
case LOCAL_GL_TEXTURE_2D_ARRAY:
return true;
default:
MOZ_CRASH("GFX: bad target");
}
}
GLenum DoTexImage(gl::GLContext* gl, TexImageTarget target, GLint level,
const webgl::DriverUnpackInfo* dui, GLsizei width,
GLsizei height, GLsizei depth, const void* data) {
const GLint border = 0;
gl::GLContext::LocalErrorScope errorScope(*gl);
if (IsTarget3D(target)) {
gl->fTexImage3D(target.get(), level, dui->internalFormat, width, height,
depth, border, dui->unpackFormat, dui->unpackType, data);
} else {
MOZ_ASSERT(depth == 1);
gl->fTexImage2D(target.get(), level, dui->internalFormat, width, height,
border, dui->unpackFormat, dui->unpackType, data);
}
return errorScope.GetError();
}
GLenum DoTexSubImage(gl::GLContext* gl, TexImageTarget target, GLint level,
GLint xOffset, GLint yOffset, GLint zOffset, GLsizei width,
GLsizei height, GLsizei depth,
const webgl::PackingInfo& pi, const void* data) {
gl::GLContext::LocalErrorScope errorScope(*gl);
if (IsTarget3D(target)) {
gl->fTexSubImage3D(target.get(), level, xOffset, yOffset, zOffset, width,
height, depth, pi.format, pi.type, data);
} else {
MOZ_ASSERT(zOffset == 0);
MOZ_ASSERT(depth == 1);
gl->fTexSubImage2D(target.get(), level, xOffset, yOffset, width, height,
pi.format, pi.type, data);
}
return errorScope.GetError();
}
static inline GLenum DoCompressedTexImage(gl::GLContext* gl,
TexImageTarget target, GLint level,
GLenum internalFormat, GLsizei width,
GLsizei height, GLsizei depth,
GLsizei dataSize, const void* data) {
const GLint border = 0;
gl::GLContext::LocalErrorScope errorScope(*gl);
if (IsTarget3D(target)) {
gl->fCompressedTexImage3D(target.get(), level, internalFormat, width,
height, depth, border, dataSize, data);
} else {
MOZ_ASSERT(depth == 1);
gl->fCompressedTexImage2D(target.get(), level, internalFormat, width,
height, border, dataSize, data);
}
return errorScope.GetError();
}
GLenum DoCompressedTexSubImage(gl::GLContext* gl, TexImageTarget target,
GLint level, GLint xOffset, GLint yOffset,
GLint zOffset, GLsizei width, GLsizei height,
GLsizei depth, GLenum sizedUnpackFormat,
GLsizei dataSize, const void* data) {
gl::GLContext::LocalErrorScope errorScope(*gl);
if (IsTarget3D(target)) {
gl->fCompressedTexSubImage3D(target.get(), level, xOffset, yOffset, zOffset,
width, height, depth, sizedUnpackFormat,
dataSize, data);
} else {
MOZ_ASSERT(zOffset == 0);
MOZ_ASSERT(depth == 1);
gl->fCompressedTexSubImage2D(target.get(), level, xOffset, yOffset, width,
height, sizedUnpackFormat, dataSize, data);
}
return errorScope.GetError();
}
static inline GLenum DoCopyTexSubImage(gl::GLContext* gl, TexImageTarget target,
GLint level, GLint xOffset,
GLint yOffset, GLint zOffset, GLint x,
GLint y, GLsizei width, GLsizei height) {
gl::GLContext::LocalErrorScope errorScope(*gl);
if (IsTarget3D(target)) {
gl->fCopyTexSubImage3D(target.get(), level, xOffset, yOffset, zOffset, x, y,
width, height);
} else {
MOZ_ASSERT(zOffset == 0);
gl->fCopyTexSubImage2D(target.get(), level, xOffset, yOffset, x, y, width,
height);
}
return errorScope.GetError();
}
//////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////
// Actual (mostly generic) function implementations
static bool ValidateCompressedTexImageRestrictions(
const WebGLContext* webgl, TexImageTarget target, uint32_t level,
const webgl::FormatInfo* format, const uvec3& size) {
const auto fnIsDimValid_S3TC = [&](const char* const name, uint32_t levelSize,
uint32_t blockSize) {
const auto impliedBaseSize = levelSize << level;
if (impliedBaseSize % blockSize == 0) return true;
webgl->ErrorInvalidOperation(
"%u is never a valid %s for level %u, because it implies a base mip %s "
"of %u."
" %s requires that base mip levels have a %s multiple of %u.",
levelSize, name, level, name, impliedBaseSize, format->name, name,
blockSize);
return false;
};
switch (format->compression->family) {
case webgl::CompressionFamily::ASTC:
if (target == LOCAL_GL_TEXTURE_3D &&
!webgl->gl->IsExtensionSupported(
gl::GLContext::KHR_texture_compression_astc_hdr)) {
webgl->ErrorInvalidOperation("TEXTURE_3D requires ASTC's hdr profile.");
return false;
}
break;
case webgl::CompressionFamily::PVRTC:
if (!IsPowerOfTwo(size.x) || !IsPowerOfTwo(size.y)) {
webgl->ErrorInvalidValue("%s requires power-of-two width and height.",
format->name);
return false;
}
break;
case webgl::CompressionFamily::BPTC:
case webgl::CompressionFamily::RGTC:
case webgl::CompressionFamily::S3TC:
if (!fnIsDimValid_S3TC("width", size.x,
format->compression->blockWidth) ||
!fnIsDimValid_S3TC("height", size.y,
format->compression->blockHeight)) {
return false;
}
break;
// Default: There are no restrictions on CompressedTexImage.
case webgl::CompressionFamily::ES3:
case webgl::CompressionFamily::ETC1:
break;
}
return true;
}
static bool ValidateTargetForFormat(const WebGLContext* webgl,
TexImageTarget target,
const webgl::FormatInfo* format) {
// GLES 3.0.4 p127:
// "Textures with a base internal format of DEPTH_COMPONENT or DEPTH_STENCIL
// are supported by texture image specification commands only if `target` is
// TEXTURE_2D, TEXTURE_2D_ARRAY, or TEXTURE_CUBE_MAP. Using these formats in
// conjunction with any other `target` will result in an INVALID_OPERATION
// error."
const bool ok = [&]() {
if (bool(format->d) & (target == LOCAL_GL_TEXTURE_3D)) return false;
if (format->compression) {
switch (format->compression->family) {
case webgl::CompressionFamily::ES3:
case webgl::CompressionFamily::S3TC:
if (target == LOCAL_GL_TEXTURE_3D) return false;
break;
case webgl::CompressionFamily::ETC1:
case webgl::CompressionFamily::PVRTC:
case webgl::CompressionFamily::RGTC:
if (target == LOCAL_GL_TEXTURE_3D ||
target == LOCAL_GL_TEXTURE_2D_ARRAY) {
return false;
}
break;
default:
break;
}
}
return true;
}();
if (!ok) {
webgl->ErrorInvalidOperation("Format %s cannot be used with target %s.",
format->name, GetEnumName(target.get()));
return false;
}
return true;
}
void WebGLTexture::TexStorage(TexTarget target, uint32_t levels,
GLenum sizedFormat, const uvec3& size) {
// Check levels
if (levels < 1) {
mContext->ErrorInvalidValue("`levels` must be >= 1.");
return;
}
if (!size.x || !size.y || !size.z) {
mContext->ErrorInvalidValue("Dimensions must be non-zero.");
return;
}
const TexImageTarget testTarget =
IsCubeMap() ? LOCAL_GL_TEXTURE_CUBE_MAP_POSITIVE_X : target.get();
webgl::ImageInfo* baseImageInfo;
if (!ValidateTexImageSpecification(testTarget, 0, size, &baseImageInfo)) {
return;
}
MOZ_ALWAYS_TRUE(baseImageInfo);
auto dstUsage = mContext->mFormatUsage->GetSizedTexUsage(sizedFormat);
if (!dstUsage) {
mContext->ErrorInvalidEnumInfo("internalformat", sizedFormat);
return;
}
auto dstFormat = dstUsage->format;
if (!ValidateTargetForFormat(mContext, testTarget, dstFormat)) return;
if (dstFormat->compression) {
if (!ValidateCompressedTexImageRestrictions(mContext, testTarget, 0,
dstFormat, size)) {
return;
}
}
////////////////////////////////////
const bool levelsOk = [&]() {
// Right-shift is only defined for bits-1, which is too large anyways.
const auto lastLevel = uint32_t(levels - 1);
if (lastLevel > 31) return false;
const auto lastLevelWidth = uint32_t(size.x) >> lastLevel;
const auto lastLevelHeight = uint32_t(size.y) >> lastLevel;
// If these are all zero, then some earlier level was the final 1x1(x1)
// level.
bool ok = lastLevelWidth || lastLevelHeight;
if (target == LOCAL_GL_TEXTURE_3D) {
const auto lastLevelDepth = uint32_t(size.z) >> lastLevel;
ok |= bool(lastLevelDepth);
}
return ok;
}();
if (!levelsOk) {
mContext->ErrorInvalidOperation(
"Too many levels requested for the given"
" dimensions. (levels: %u, width: %u, height: %u,"
" depth: %u)",
levels, size.x, size.y, size.z);
return;
}
////////////////////////////////////
// Do the thing!
GLenum error = DoTexStorage(mContext->gl, target.get(), levels, sizedFormat,
size.x, size.y, size.z);
mContext->OnDataAllocCall();
if (error == LOCAL_GL_OUT_OF_MEMORY) {
mContext->ErrorOutOfMemory("Ran out of memory during texture allocation.");
Truncate();
return;
}
if (error) {
mContext->GenerateError(error, "Unexpected error from driver.");
const nsPrintfCString call(
"DoTexStorage(0x%04x, %i, 0x%04x, %i,%i,%i) -> 0x%04x", target.get(),
levels, sizedFormat, size.x, size.y, size.z, error);
gfxCriticalError() << "Unexpected error from driver: "
<< call.BeginReading();
return;
}
////////////////////////////////////
// Update our specification data.
auto uninitializedSlices = Some(std::vector<bool>(size.z, true));
const webgl::ImageInfo newInfo{dstUsage, size.x, size.y, size.z,
std::move(uninitializedSlices)};
{
const auto base_level = mBaseMipmapLevel;
mBaseMipmapLevel = 0;
ImageInfoAtFace(0, 0) = newInfo;
PopulateMipChain(levels - 1);
mBaseMipmapLevel = base_level;
}
mImmutable = true;
mImmutableLevelCount = AutoAssertCast(levels);
ClampLevelBaseAndMax();
}
////////////////////////////////////////
// Tex(Sub)Image
// TexSubImage iff `!respectFormat`
void WebGLTexture::TexImage(uint32_t level, GLenum respecFormat,
const uvec3& offset, const webgl::PackingInfo& pi,
const webgl::TexUnpackBlobDesc& src) {
Maybe<RawBuffer<>> cpuDataView;
if (src.cpuData) {
cpuDataView = Some(RawBuffer<>{src.cpuData->Data()});
}
const auto srcViewDesc = webgl::TexUnpackBlobDesc{src.imageTarget,
src.size,
src.srcAlphaType,
std::move(cpuDataView),
src.pboOffset,
src.imageSize,
src.image,
src.sd,
src.dataSurf,
src.unpacking,
src.applyUnpackTransforms};
const auto blob = webgl::TexUnpackBlob::Create(srcViewDesc);
if (!blob) {
MOZ_ASSERT(false);
return;
}
const auto imageTarget = blob->mDesc.imageTarget;
auto size = blob->mDesc.size;
if (!IsTarget3D(imageTarget)) {
size.z = 1;
}
////////////////////////////////////
// Get dest info
const auto& fua = mContext->mFormatUsage;
const auto fnValidateUnpackEnums = [&]() {
if (!fua->AreUnpackEnumsValid(pi.format, pi.type)) {
mContext->ErrorInvalidEnum("Invalid unpack format/type: %s/%s",
EnumString(pi.format).c_str(),
EnumString(pi.type).c_str());
return false;
}
return true;
};
webgl::ImageInfo* imageInfo;
const webgl::FormatUsageInfo* dstUsage;
if (respecFormat) {
if (!ValidateTexImageSpecification(imageTarget, level, size, &imageInfo))
return;
MOZ_ASSERT(imageInfo);
if (!fua->IsInternalFormatEnumValid(respecFormat)) {
mContext->ErrorInvalidValue("Invalid internalformat: 0x%04x",
respecFormat);
return;
}
dstUsage = fua->GetSizedTexUsage(respecFormat);
if (!dstUsage) {
if (respecFormat != pi.format) {
/* GL ES Version 3.0.4 - 3.8.3 Texture Image Specification
* "Specifying a combination of values for format, type, and
* internalformat that is not listed as a valid combination
* in tables 3.2 or 3.3 generates the error INVALID_OPERATION."
*/
if (!fnValidateUnpackEnums()) return;
mContext->ErrorInvalidOperation(
"Unsized internalFormat must match"
" unpack format.");
return;
}
dstUsage = fua->GetUnsizedTexUsage(pi);
}
if (!dstUsage) {
if (!fnValidateUnpackEnums()) return;
mContext->ErrorInvalidOperation(
"Invalid internalformat/format/type:"
" 0x%04x/0x%04x/0x%04x",
respecFormat, pi.format, pi.type);
return;
}
const auto& dstFormat = dstUsage->format;
if (!ValidateTargetForFormat(mContext, imageTarget, dstFormat)) return;
if (!mContext->IsWebGL2() && dstFormat->d) {
if (imageTarget != LOCAL_GL_TEXTURE_2D || blob->HasData() || level != 0) {
mContext->ErrorInvalidOperation(
"With format %s, this function may only"
" be called with target=TEXTURE_2D,"
" data=null, and level=0.",
dstFormat->name);
return;
}
}
} else {
if (!ValidateTexImageSelection(imageTarget, level, offset, size,
&imageInfo)) {
return;
}
MOZ_ASSERT(imageInfo);
dstUsage = imageInfo->mFormat;
const auto& dstFormat = dstUsage->format;
if (!mContext->IsWebGL2() && dstFormat->d) {
mContext->ErrorInvalidOperation(
"Function may not be called on a texture of"
" format %s.",
dstFormat->name);
return;
}
}
////////////////////////////////////
// Get source info
const webgl::DriverUnpackInfo* driverUnpackInfo;
if (!dstUsage->IsUnpackValid(pi, &driverUnpackInfo)) {
if (!fnValidateUnpackEnums()) return;
mContext->ErrorInvalidOperation(
"Mismatched internalFormat and format/type:"
" 0x%04x and 0x%04x/0x%04x",
respecFormat, pi.format, pi.type);
return;
}
if (!blob->Validate(mContext, pi)) return;
////////////////////////////////////
// Do the thing!
Maybe<webgl::ImageInfo> newImageInfo;
bool isRespec = false;
if (respecFormat) {
// It's tempting to do allocation first, and TexSubImage second, but this is
// generally slower.
newImageInfo = Some(webgl::ImageInfo{dstUsage, size.x, size.y, size.z});
if (!blob->HasData()) {
newImageInfo->mUninitializedSlices =
Some(std::vector<bool>(size.z, true));
}
isRespec = (imageInfo->mWidth != newImageInfo->mWidth ||
imageInfo->mHeight != newImageInfo->mHeight ||
imageInfo->mDepth != newImageInfo->mDepth ||
imageInfo->mFormat != newImageInfo->mFormat);
} else {
if (!blob->HasData()) {
mContext->ErrorInvalidValue("`source` cannot be null.");
return;
}
if (!EnsureImageDataInitializedForUpload(this, imageTarget, level, offset,
size, imageInfo)) {
return;
}
}
WebGLPixelStore::AssertDefault(*mContext->gl, mContext->IsWebGL2());
blob->mDesc.unpacking.Apply(*mContext->gl, mContext->IsWebGL2(), size);
const auto revertUnpacking = MakeScopeExit([&]() {
const WebGLPixelStore defaultUnpacking;
defaultUnpacking.Apply(*mContext->gl, mContext->IsWebGL2(), size);
});
const bool isSubImage = !respecFormat;
GLenum glError = 0;
if (!blob->TexOrSubImage(isSubImage, isRespec, this, level, driverUnpackInfo,
offset.x, offset.y, offset.z, pi, &glError)) {
return;
}
if (glError == LOCAL_GL_OUT_OF_MEMORY) {
mContext->ErrorOutOfMemory("Driver ran out of memory during upload.");
Truncate();
return;
}
if (glError) {
const auto enumStr = EnumString(glError);
const nsPrintfCString dui(
"Unexpected error %s during upload. (dui: %x/%x/%x)", enumStr.c_str(),
driverUnpackInfo->internalFormat, driverUnpackInfo->unpackFormat,
driverUnpackInfo->unpackType);
mContext->ErrorInvalidOperation("%s", dui.BeginReading());
gfxCriticalError() << mContext->FuncName() << ": " << dui.BeginReading();
return;
}
////////////////////////////////////
// Update our specification data?
if (respecFormat) {
mContext->OnDataAllocCall();
*imageInfo = *newImageInfo;
InvalidateCaches();
}
}
////////////////////////////////////////
// CompressedTex(Sub)Image
static inline bool IsSubImageBlockAligned(
const webgl::CompressedFormatInfo* compression,
const webgl::ImageInfo* imageInfo, GLint xOffset, GLint yOffset,
uint32_t width, uint32_t height) {
if (xOffset % compression->blockWidth != 0 ||
yOffset % compression->blockHeight != 0) {
return false;
}
if (width % compression->blockWidth != 0 &&
xOffset + width != imageInfo->mWidth)
return false;
if (height % compression->blockHeight != 0 &&
yOffset + height != imageInfo->mHeight)
return false;
return true;
}
// CompressedTexSubImage iff `sub`
void WebGLTexture::CompressedTexImage(bool sub, GLenum imageTarget,
uint32_t level, GLenum formatEnum,
const uvec3& offset, const uvec3& size,
const Range<const uint8_t>& src,
const uint32_t pboImageSize,
const Maybe<uint64_t>& pboOffset) {
auto imageSize = pboImageSize;
if (pboOffset) {
const auto& buffer =
mContext->ValidateBufferSelection(LOCAL_GL_PIXEL_UNPACK_BUFFER);
if (!buffer) return;
auto availBytes = buffer->ByteLength();
if (*pboOffset > availBytes) {
mContext->GenerateError(
LOCAL_GL_INVALID_OPERATION,
"`offset` (%llu) must be <= PIXEL_UNPACK_BUFFER size (%llu).",
*pboOffset, availBytes);
return;
}
availBytes -= *pboOffset;
if (availBytes < pboImageSize) {
mContext->GenerateError(
LOCAL_GL_INVALID_OPERATION,
"PIXEL_UNPACK_BUFFER size minus `offset` (%llu) too small for"
" `pboImageSize` (%u).",
availBytes, pboImageSize);
return;
}
} else {
if (mContext->mBoundPixelUnpackBuffer) {
mContext->GenerateError(LOCAL_GL_INVALID_OPERATION,
"PIXEL_UNPACK_BUFFER is non-null.");
return;
}
imageSize = src.length();
}
// -
const auto usage = mContext->mFormatUsage->GetSizedTexUsage(formatEnum);
if (!usage || !usage->format->compression) {
mContext->ErrorInvalidEnumArg("format", formatEnum);
return;
}
webgl::ImageInfo* imageInfo;
if (!sub) {
if (!ValidateTexImageSpecification(imageTarget, level, size, &imageInfo)) {
return;
}
MOZ_ASSERT(imageInfo);
if (!ValidateTargetForFormat(mContext, imageTarget, usage->format)) return;
if (!ValidateCompressedTexImageRestrictions(mContext, imageTarget, level,
usage->format, size)) {
return;
}
} else {
if (!ValidateTexImageSelection(imageTarget, level, offset, size,
&imageInfo))
return;
MOZ_ASSERT(imageInfo);
const auto dstUsage = imageInfo->mFormat;
if (usage != dstUsage) {
mContext->ErrorInvalidOperation(
"`format` must match the format of the"
" existing texture image.");
return;
}
const auto& format = usage->format;
switch (format->compression->family) {
// Forbidden:
case webgl::CompressionFamily::ETC1:
mContext->ErrorInvalidOperation(
"Format does not allow sub-image"
" updates.");
return;
// Block-aligned:
case webgl::CompressionFamily::ES3: // Yes, the ES3 formats don't match
// the ES3
case webgl::CompressionFamily::S3TC: // default behavior.
case webgl::CompressionFamily::BPTC:
case webgl::CompressionFamily::RGTC:
if (!IsSubImageBlockAligned(format->compression, imageInfo, offset.x,
offset.y, size.x, size.y)) {
mContext->ErrorInvalidOperation(
"Format requires block-aligned sub-image"
" updates.");
return;
}
break;
// Full-only: (The ES3 default)
case webgl::CompressionFamily::ASTC:
case webgl::CompressionFamily::PVRTC:
if (offset.x || offset.y || size.x != imageInfo->mWidth ||
size.y != imageInfo->mHeight) {
mContext->ErrorInvalidOperation(
"Format does not allow partial sub-image"
" updates.");
return;
}
break;
}
}
switch (usage->format->compression->family) {
case webgl::CompressionFamily::BPTC:
case webgl::CompressionFamily::RGTC:
if (level == 0) {
if (size.x % 4 != 0 || size.y % 4 != 0) {
mContext->ErrorInvalidOperation(
"For level == 0, width and height must be multiples of 4.");
return;
}
}
break;
default:
break;
}
if (!ValidateCompressedTexUnpack(mContext, size, usage->format, imageSize))
return;
////////////////////////////////////
// Do the thing!
if (sub) {
if (!EnsureImageDataInitializedForUpload(this, imageTarget, level, offset,
size, imageInfo)) {
return;
}
}
const ScopedLazyBind bindPBO(mContext->gl, LOCAL_GL_PIXEL_UNPACK_BUFFER,
mContext->mBoundPixelUnpackBuffer);
GLenum error;
const void* ptr;
if (pboOffset) {
ptr = reinterpret_cast<const void*>(*pboOffset);
} else {
ptr = reinterpret_cast<const void*>(src.begin().get());
}
if (!sub) {
error = DoCompressedTexImage(mContext->gl, imageTarget, level, formatEnum,
size.x, size.y, size.z, imageSize, ptr);
} else {
error = DoCompressedTexSubImage(mContext->gl, imageTarget, level, offset.x,
offset.y, offset.z, size.x, size.y, size.z,
formatEnum, imageSize, ptr);
}
if (error == LOCAL_GL_OUT_OF_MEMORY) {
mContext->ErrorOutOfMemory("Ran out of memory during upload.");
Truncate();
return;
}
if (error) {
mContext->GenerateError(error, "Unexpected error from driver.");
nsCString call;
if (!sub) {
call = nsPrintfCString(
"DoCompressedTexImage(0x%04x, %u, 0x%04x, %u,%u,%u, %u, %p)",
imageTarget, level, formatEnum, size.x, size.y, size.z, imageSize,
ptr);
} else {
call = nsPrintfCString(
"DoCompressedTexSubImage(0x%04x, %u, %u,%u,%u, %u,%u,%u, 0x%04x, %u, "
"%p)",
imageTarget, level, offset.x, offset.y, offset.z, size.x, size.y,
size.z, formatEnum, imageSize, ptr);
}
gfxCriticalError() << "Unexpected error " << gfx::hexa(error)
<< " from driver: " << call.BeginReading();
return;
}
////////////////////////////////////
// Update our specification data?
if (!sub) {
const auto uninitializedSlices = Nothing();
const webgl::ImageInfo newImageInfo{usage, size.x, size.y, size.z,
uninitializedSlices};
*imageInfo = newImageInfo;
InvalidateCaches();
}
}
////////////////////////////////////////
// CopyTex(Sub)Image
static bool ValidateCopyTexImageFormats(WebGLContext* webgl,
const webgl::FormatInfo* srcFormat,
const webgl::FormatInfo* dstFormat) {
MOZ_ASSERT(!srcFormat->compression);
if (dstFormat->compression) {
webgl->ErrorInvalidEnum(
"Specified destination must not have a compressed"
" format.");
return false;
}
if (dstFormat->effectiveFormat == webgl::EffectiveFormat::RGB9_E5) {
webgl->ErrorInvalidOperation(
"RGB9_E5 is an invalid destination for"
" CopyTex(Sub)Image. (GLES 3.0.4 p145)");
return false;
}
if (!DoChannelsMatchForCopyTexImage(srcFormat, dstFormat)) {
webgl->ErrorInvalidOperation(
"Destination channels must be compatible with"
" source channels. (GLES 3.0.4 p140 Table 3.16)");
return false;
}
return true;
}
////////////////////////////////////////////////////////////////////////////////
class ScopedCopyTexImageSource {
WebGLContext* const mWebGL;
GLuint mRB;
GLuint mFB;
public:
ScopedCopyTexImageSource(WebGLContext* webgl, uint32_t srcWidth,
uint32_t srcHeight,
const webgl::FormatInfo* srcFormat,
const webgl::FormatUsageInfo* dstUsage);
~ScopedCopyTexImageSource();
};
ScopedCopyTexImageSource::ScopedCopyTexImageSource(
WebGLContext* webgl, uint32_t srcWidth, uint32_t srcHeight,
const webgl::FormatInfo* srcFormat, const webgl::FormatUsageInfo* dstUsage)
: mWebGL(webgl), mRB(0), mFB(0) {
switch (dstUsage->format->unsizedFormat) {
case webgl::UnsizedFormat::L:
case webgl::UnsizedFormat::A:
case webgl::UnsizedFormat::LA:
webgl->GenerateWarning(
"Copying to a LUMINANCE, ALPHA, or LUMINANCE_ALPHA"
" is deprecated, and has severely reduced performance"
" on some platforms.");
break;
default:
MOZ_ASSERT(!dstUsage->textureSwizzleRGBA);
return;
}
if (!dstUsage->textureSwizzleRGBA) return;
gl::GLContext* gl = webgl->gl;
GLenum sizedFormat;
switch (srcFormat->componentType) {
case webgl::ComponentType::NormUInt:
sizedFormat = LOCAL_GL_RGBA8;
break;
case webgl::ComponentType::Float:
if (webgl->IsExtensionEnabled(
WebGLExtensionID::WEBGL_color_buffer_float)) {
sizedFormat = LOCAL_GL_RGBA32F;
webgl->WarnIfImplicit(WebGLExtensionID::WEBGL_color_buffer_float);
break;
}
if (webgl->IsExtensionEnabled(
WebGLExtensionID::EXT_color_buffer_half_float)) {
sizedFormat = LOCAL_GL_RGBA16F;
webgl->WarnIfImplicit(WebGLExtensionID::EXT_color_buffer_half_float);
break;
}
MOZ_CRASH("GFX: Should be able to request CopyTexImage from Float.");
default:
MOZ_CRASH("GFX: Should be able to request CopyTexImage from this type.");
}
gl::ScopedTexture scopedTex(gl);
gl::ScopedBindTexture scopedBindTex(gl, scopedTex.Texture(),
LOCAL_GL_TEXTURE_2D);
gl->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_MIN_FILTER,
LOCAL_GL_NEAREST);
gl->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_MAG_FILTER,
LOCAL_GL_NEAREST);
GLint blitSwizzle[4] = {LOCAL_GL_ZERO};
switch (dstUsage->format->unsizedFormat) {
case webgl::UnsizedFormat::L:
blitSwizzle[0] = LOCAL_GL_RED;
break;
case webgl::UnsizedFormat::A:
blitSwizzle[0] = LOCAL_GL_ALPHA;
break;
case webgl::UnsizedFormat::LA:
blitSwizzle[0] = LOCAL_GL_RED;
blitSwizzle[1] = LOCAL_GL_ALPHA;
break;
default:
MOZ_CRASH("GFX: Unhandled unsizedFormat.");
}
gl->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_SWIZZLE_R,
blitSwizzle[0]);
gl->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_SWIZZLE_G,
blitSwizzle[1]);
gl->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_SWIZZLE_B,
blitSwizzle[2]);
gl->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_SWIZZLE_A,
blitSwizzle[3]);
gl->fCopyTexImage2D(LOCAL_GL_TEXTURE_2D, 0, sizedFormat, 0, 0, srcWidth,
srcHeight, 0);
// Now create the swizzled FB we'll be exposing.
GLuint rgbaRB = 0;
GLuint rgbaFB = 0;
{
gl->fGenRenderbuffers(1, &rgbaRB);
gl::ScopedBindRenderbuffer scopedRB(gl, rgbaRB);
gl->fRenderbufferStorage(LOCAL_GL_RENDERBUFFER, sizedFormat, srcWidth,
srcHeight);
gl->fGenFramebuffers(1, &rgbaFB);
gl->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, rgbaFB);
gl->fFramebufferRenderbuffer(LOCAL_GL_FRAMEBUFFER,
LOCAL_GL_COLOR_ATTACHMENT0,
LOCAL_GL_RENDERBUFFER, rgbaRB);
const GLenum status = gl->fCheckFramebufferStatus(LOCAL_GL_FRAMEBUFFER);
if (status != LOCAL_GL_FRAMEBUFFER_COMPLETE) {
MOZ_CRASH("GFX: Temp framebuffer is not complete.");
}
}
// Draw-blit rgbaTex into rgbaFB.
const gfx::IntSize srcSize(srcWidth, srcHeight);
{
const gl::ScopedBindFramebuffer bindFB(gl, rgbaFB);
gl->BlitHelper()->DrawBlitTextureToFramebuffer(scopedTex.Texture(), srcSize,
srcSize);
}
// Leave RB and FB alive, and FB bound.