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gecko-dev/dom/canvas/WebGLTextureUpload.cpp

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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* 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 "CanvasUtils.h"
#include "gfxPrefs.h"
#include "GLBlitHelper.h"
#include "GLContext.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/dom/HTMLVideoElement.h"
#include "mozilla/dom/ImageData.h"
#include "mozilla/MathAlgorithms.h"
#include "mozilla/Scoped.h"
#include "mozilla/unused.h"
#include "ScopedGLHelpers.h"
#include "TexUnpackBlob.h"
#include "WebGLContext.h"
#include "WebGLContextUtils.h"
#include "WebGLFramebuffer.h"
#include "WebGLTexelConversions.h"
namespace mozilla {
/* This file handles:
* TexStorage2D(texTarget, levels, internalFormat, width, height)
* TexStorage3D(texTarget, levels, intenralFormat, width, height, depth)
*
* TexImage2D(texImageTarget, level, internalFormat, width, height, border, unpackFormat,
* unpackType, data)
* TexImage3D(texImageTarget, level, internalFormat, width, height, depth, border,
* unpackFormat, unpackType, data)
* TexSubImage2D(texImageTarget, level, xOffset, yOffset, width, height, unpackFormat,
* unpackType, data)
* TexSubImage3D(texImageTarget, level, xOffset, yOffset, zOffset, width, height, depth,
* unpackFormat, unpackType, data)
*
* CompressedTexImage2D(texImageTarget, level, internalFormat, width, height, border,
* imageSize, data)
* CompressedTexImage3D(texImageTarget, level, internalFormat, width, height, depth,
* border, imageSize, data)
* CompressedTexSubImage2D(texImageTarget, level, xOffset, yOffset, width, height,
* sizedUnpackFormat, imageSize, data)
* CompressedTexSubImage3D(texImageTarget, level, xOffset, yOffset, zOffset, width,
* height, depth, sizedUnpackFormat, imageSize, data)
*
* CopyTexImage2D(texImageTarget, level, internalFormat, x, y, width, height, border)
* CopyTexImage3D - "Because the framebuffer is inhererntly two-dimensional, there is no
* CopyTexImage3D command."
* CopyTexSubImage2D(texImageTarget, level, xOffset, yOffset, x, y, width, height)
* CopyTexSubImage3D(texImageTarget, level, xOffset, yOffset, zOffset, x, y, width,
* height)
*/
static bool
ValidateExtents(WebGLContext* webgl, const char* funcName, GLsizei width, GLsizei height,
GLsizei depth, GLint border, uint32_t* const out_width,
uint32_t* const out_height, uint32_t* const out_depth)
{
// Check border
if (border != 0) {
webgl->ErrorInvalidValue("%s: `border` must be 0.", funcName);
return false;
}
if (width < 0 || height < 0 || depth < 0) {
/* GL ES Version 2.0.25 - 3.7.1 Texture Image Specification
* "If wt and ht are the specified image width and height,
* and if either wt or ht are less than zero, then the error
* INVALID_VALUE is generated."
*/
webgl->ErrorInvalidValue("%s: `width`/`height`/`depth` must be >= 0.", funcName);
return false;
}
*out_width = width;
*out_height = height;
*out_depth = depth;
return true;
}
////////////////////////////////////////
// ArrayBufferView?
static inline bool
DoesJSTypeMatchUnpackType(GLenum unpackType, js::Scalar::Type jsType)
{
switch (unpackType) {
case LOCAL_GL_BYTE:
return jsType == js::Scalar::Type::Int8;
case LOCAL_GL_UNSIGNED_BYTE:
return jsType == js::Scalar::Type::Uint8 ||
jsType == js::Scalar::Type::Uint8Clamped;
case LOCAL_GL_SHORT:
return jsType == js::Scalar::Type::Int16;
case LOCAL_GL_UNSIGNED_SHORT:
case LOCAL_GL_UNSIGNED_SHORT_4_4_4_4:
case LOCAL_GL_UNSIGNED_SHORT_5_5_5_1:
case LOCAL_GL_UNSIGNED_SHORT_5_6_5:
case LOCAL_GL_HALF_FLOAT:
case LOCAL_GL_HALF_FLOAT_OES:
return jsType == js::Scalar::Type::Uint16;
case LOCAL_GL_INT:
return jsType == js::Scalar::Type::Int32;
case LOCAL_GL_UNSIGNED_INT:
case LOCAL_GL_UNSIGNED_INT_2_10_10_10_REV:
case LOCAL_GL_UNSIGNED_INT_10F_11F_11F_REV:
case LOCAL_GL_UNSIGNED_INT_5_9_9_9_REV:
case LOCAL_GL_UNSIGNED_INT_24_8:
return jsType == js::Scalar::Type::Uint32;
case LOCAL_GL_FLOAT:
return jsType == js::Scalar::Type::Float32;
default:
return false;
}
}
bool
WebGLContext::ValidateUnpackPixels(const char* funcName, uint32_t fullRows,
uint32_t tailPixels, webgl::TexUnpackBlob* blob)
{
auto skipPixels = CheckedUint32(blob->mSkipPixels);
skipPixels += CheckedUint32(blob->mSkipRows);
const auto usedPixelsPerRow = CheckedUint32(blob->mSkipPixels) + blob->mWidth;
if (!usedPixelsPerRow.isValid() || usedPixelsPerRow.value() > blob->mRowLength) {
ErrorInvalidOperation("%s: UNPACK_SKIP_PIXELS + height > UNPACK_ROW_LENGTH.",
funcName);
return false;
}
if (blob->mHeight > blob->mImageHeight) {
ErrorInvalidOperation("%s: height > UNPACK_IMAGE_HEIGHT.", funcName);
return false;
}
//////
// The spec doesn't bound SKIP_ROWS + height <= IMAGE_HEIGHT, unfortunately.
auto skipFullRows = CheckedUint32(blob->mSkipImages) * blob->mImageHeight;
skipFullRows += blob->mSkipRows;
MOZ_ASSERT(blob->mDepth >= 1);
MOZ_ASSERT(blob->mHeight >= 1);
auto usedFullRows = CheckedUint32(blob->mDepth - 1) * blob->mImageHeight;
usedFullRows += blob->mHeight - 1; // Full rows in the final image, excluding the tail.
const auto fullRowsNeeded = skipFullRows + usedFullRows;
if (!fullRowsNeeded.isValid()) {
ErrorOutOfMemory("%s: Invalid calculation for required row count.",
funcName);
return false;
}
if (fullRows > fullRowsNeeded.value())
return true;
if (fullRows == fullRowsNeeded.value() && tailPixels >= usedPixelsPerRow.value()) {
blob->mNeedsExactUpload = true;
return true;
}
ErrorInvalidOperation("%s: Desired upload requires more data than is available: (%u"
" rows plus %u pixels needed, %u rows plus %u pixels"
" available)",
funcName, fullRowsNeeded.value(), usedPixelsPerRow.value(),
fullRows, tailPixels);
return false;
}
static bool
ValidateUnpackBytes(WebGLContext* webgl, const char* funcName, uint32_t width,
uint32_t height, uint32_t depth, const webgl::PackingInfo& pi,
uint32_t byteCount, webgl::TexUnpackBlob* blob)
{
const auto bytesPerPixel = webgl::BytesPerPixel(pi);
const auto bytesPerRow = CheckedUint32(blob->mRowLength) * bytesPerPixel;
const auto rowStride = RoundUpToMultipleOf(bytesPerRow, blob->mAlignment);
const auto fullRows = byteCount / rowStride;
if (!fullRows.isValid()) {
webgl->ErrorOutOfMemory("%s: Unacceptable upload size calculated.");
return false;
}
const auto bodyBytes = fullRows.value() * rowStride.value();
const auto tailPixels = (byteCount - bodyBytes) / bytesPerPixel;
return webgl->ValidateUnpackPixels(funcName, fullRows.value(), tailPixels, blob);
}
bool
WebGLContext::ValidateUnpackInfo(const char* funcName, bool usePBOs, GLenum format,
GLenum type, webgl::PackingInfo* const out)
{
if (usePBOs != bool(mBoundPixelUnpackBuffer)) {
ErrorInvalidOperation("%s: PACK_BUFFER must be %s.", funcName,
(usePBOs ? "non-null" : "null"));
return false;
}
if (!mFormatUsage->AreUnpackEnumsValid(format, type)) {
ErrorInvalidEnum("%s: Invalid unpack format/type: 0x%04x/0x%04x", funcName,
format, type);
return false;
}
out->format = format;
out->type = type;
return true;
}
void
WebGLTexture::TexOrSubImage(bool isSubImage, const char* funcName, TexImageTarget target,
GLint level, GLenum internalFormat, GLint xOffset,
GLint yOffset, GLint zOffset, GLsizei rawWidth,
GLsizei rawHeight, GLsizei rawDepth, GLint border,
GLenum unpackFormat, GLenum unpackType,
const dom::Nullable<dom::ArrayBufferView>& maybeView)
{
uint32_t width, height, depth;
if (!ValidateExtents(mContext, funcName, rawWidth, rawHeight, rawDepth, border,
&width, &height, &depth))
{
return;
}
const bool usePBOs = false;
webgl::PackingInfo pi;
if (!mContext->ValidateUnpackInfo(funcName, usePBOs, unpackFormat, unpackType, &pi))
return;
////
const uint8_t* bytes = nullptr;
uint32_t byteCount = 0;
if (!maybeView.IsNull()) {
const auto& view = maybeView.Value();
const auto jsType = JS_GetArrayBufferViewType(view.Obj());
if (!DoesJSTypeMatchUnpackType(pi.type, jsType)) {
mContext->ErrorInvalidOperation("%s: `pixels` not compatible with `type`.",
funcName);
return;
}
if (width && height && depth) {
view.ComputeLengthAndData();
bytes = view.DataAllowShared();
byteCount = view.LengthAllowShared();
}
} else if (isSubImage) {
mContext->ErrorInvalidValue("%s: `pixels` must not be null.", funcName);
return;
}
const bool isClientData = true;
webgl::TexUnpackBytes blob(mContext, target, width, height, depth, isClientData,
bytes);
if (bytes &&
!ValidateUnpackBytes(mContext, funcName, width, height, depth, pi, byteCount,
&blob))
{
return;
}
TexOrSubImageBlob(isSubImage, funcName, target, level, internalFormat, xOffset,
yOffset, zOffset, pi, &blob);
}
void
WebGLTexture::TexOrSubImage(bool isSubImage, const char* funcName, TexImageTarget target,
GLint level, GLenum internalFormat, GLint xOffset,
GLint yOffset, GLint zOffset, GLsizei rawWidth,
GLsizei rawHeight, GLsizei rawDepth, GLint border,
GLenum unpackFormat, GLenum unpackType,
WebGLsizeiptr offset)
{
uint32_t width, height, depth;
if (!ValidateExtents(mContext, funcName, rawWidth, rawHeight, rawDepth, border,
&width, &height, &depth))
{
return;
}
const bool usePBOs = true;
webgl::PackingInfo pi;
if (!mContext->ValidateUnpackInfo(funcName, usePBOs, unpackFormat, unpackType, &pi))
return;
////
if (offset < 0) {
mContext->ErrorInvalidValue("%s: offset cannot be negative.", funcName);
return;
}
const bool isClientData = false;
const auto ptr = (const uint8_t*)offset;
webgl::TexUnpackBytes blob(mContext, target, width, height, depth, isClientData, ptr);
const auto& packBuffer = mContext->mBoundPixelUnpackBuffer;
const auto bufferByteCount = packBuffer->ByteLength();
uint32_t byteCount = 0;
if (bufferByteCount >= offset) {
byteCount = bufferByteCount - offset;
}
if (!ValidateUnpackBytes(mContext, funcName, width, height, depth, pi, byteCount,
&blob))
{
return;
}
TexOrSubImageBlob(isSubImage, funcName, target, level, internalFormat, xOffset,
yOffset, zOffset, pi, &blob);
}
////////////////////////////////////////
// ImageData
static already_AddRefed<gfx::DataSourceSurface>
FromImageData(WebGLContext* webgl, const char* funcName, GLenum unpackType,
dom::ImageData* imageData, dom::Uint8ClampedArray* scopedArr)
{
DebugOnly<bool> inited = scopedArr->Init(imageData->GetDataObject());
MOZ_ASSERT(inited);
scopedArr->ComputeLengthAndData();
const DebugOnly<size_t> dataSize = scopedArr->Length();
const void* const data = scopedArr->Data();
const gfx::IntSize size(imageData->Width(), imageData->Height());
const size_t stride = size.width * 4;
const gfx::SurfaceFormat surfFormat = gfx::SurfaceFormat::R8G8B8A8;
MOZ_ASSERT(dataSize == stride * size.height);
uint8_t* wrappableData = (uint8_t*)data;
RefPtr<gfx::DataSourceSurface> surf =
gfx::Factory::CreateWrappingDataSourceSurface(wrappableData,
stride,
size,
surfFormat);
if (!surf) {
webgl->ErrorOutOfMemory("%s: OOM in FromImageData.", funcName);
return nullptr;
}
return surf.forget();
}
void
WebGLTexture::TexOrSubImage(bool isSubImage, const char* funcName, TexImageTarget target,
GLint level, GLenum internalFormat, GLint xOffset,
GLint yOffset, GLint zOffset, GLenum unpackFormat,
GLenum unpackType, dom::ImageData* imageData)
{
const bool usePBOs = false;
webgl::PackingInfo pi;
if (!mContext->ValidateUnpackInfo(funcName, usePBOs, unpackFormat, unpackType, &pi))
return;
if (!imageData) {
// Spec says to generate an INVALID_VALUE error
mContext->ErrorInvalidValue("%s: Null ImageData.", funcName);
return;
}
// Eventually, these will be args.
const uint32_t width = imageData->Width();
const uint32_t height = imageData->Height();
const uint32_t depth = 1;
dom::RootedTypedArray<dom::Uint8ClampedArray> scopedArr(nsContentUtils::RootingCx());
const RefPtr<gfx::DataSourceSurface> surf = FromImageData(mContext, funcName,
unpackType, imageData,
&scopedArr);
if (!surf)
return;
// WhatWG "HTML Living Standard" (30 October 2015):
// "The getImageData(sx, sy, sw, sh) method [...] Pixels must be returned as
// non-premultiplied alpha values."
const bool isAlphaPremult = false;
webgl::TexUnpackSurface blob(mContext, target, width, height, depth, surf,
isAlphaPremult);
const uint32_t fullRows = imageData->Height();
const uint32_t tailPixels = 0;
if (!mContext->ValidateUnpackPixels(funcName, fullRows, tailPixels, &blob))
return;
TexOrSubImageBlob(isSubImage, funcName, target, level, internalFormat, xOffset,
yOffset, zOffset, pi, &blob);
}
////////////////////////////////////////
// dom::Element
void
WebGLTexture::TexOrSubImage(bool isSubImage, const char* funcName, TexImageTarget target,
GLint level, GLenum internalFormat, GLint xOffset,
GLint yOffset, GLint zOffset, GLenum unpackFormat,
GLenum unpackType, dom::Element* elem,
ErrorResult* const out_error)
{
const bool usePBOs = false;
webgl::PackingInfo pi;
if (!mContext->ValidateUnpackInfo(funcName, usePBOs, unpackFormat, unpackType, &pi))
return;
//////
uint32_t flags = nsLayoutUtils::SFE_WANT_IMAGE_SURFACE |
nsLayoutUtils::SFE_USE_ELEMENT_SIZE_IF_VECTOR;
if (mContext->mPixelStore_ColorspaceConversion == LOCAL_GL_NONE)
flags |= nsLayoutUtils::SFE_NO_COLORSPACE_CONVERSION;
if (!mContext->mPixelStore_PremultiplyAlpha)
flags |= nsLayoutUtils::SFE_PREFER_NO_PREMULTIPLY_ALPHA;
RefPtr<gfx::DrawTarget> idealDrawTarget = nullptr; // Don't care for now.
auto sfer = nsLayoutUtils::SurfaceFromElement(elem, flags, idealDrawTarget);
//////
uint32_t elemWidth = 0;
uint32_t elemHeight = 0;
layers::Image* layersImage = nullptr;
if (!gfxPrefs::WebGLDisableDOMBlitUploads() && sfer.mLayersImage) {
layersImage = sfer.mLayersImage;
elemWidth = layersImage->GetSize().width;
elemHeight = layersImage->GetSize().height;
}
RefPtr<gfx::DataSourceSurface> dataSurf;
if (!layersImage && sfer.GetSourceSurface()) {
const auto surf = sfer.GetSourceSurface();
elemWidth = surf->GetSize().width;
elemHeight = surf->GetSize().height;
// WARNING: OSX can lose our MakeCurrent here.
dataSurf = surf->GetDataSurface();
}
//////
// Eventually, these will be args.
const uint32_t width = elemWidth;
const uint32_t height = elemHeight;
const uint32_t depth = 1;
if (!layersImage && !dataSurf) {
const bool isClientData = true;
const webgl::TexUnpackBytes blob(mContext, target, width, height, depth,
isClientData, nullptr);
TexOrSubImageBlob(isSubImage, funcName, target, level, internalFormat, xOffset,
yOffset, zOffset, pi, &blob);
return;
}
//////
// 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 = mContext->GetCanvas()->NodePrincipal();
if (!dstPrincipal->Subsumes(srcPrincipal)) {
mContext->GenerateWarning("%s: Cross-origin elements require CORS.",
funcName);
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.
mContext->GenerateWarning("%s: Element is write-only, thus cannot be"
" uploaded.",
funcName);
out_error->Throw(NS_ERROR_DOM_SECURITY_ERR);
return;
}
//////
// Ok, we're good!
UniquePtr<webgl::TexUnpackBlob> blob;
const bool isAlphaPremult = sfer.mIsPremultiplied;
if (layersImage) {
blob.reset(new webgl::TexUnpackImage(mContext, target, width, height, depth,
layersImage, isAlphaPremult));
} else {
MOZ_ASSERT(dataSurf);
blob.reset(new webgl::TexUnpackSurface(mContext, target, width, height, depth,
dataSurf, isAlphaPremult));
}
const uint32_t fullRows = elemHeight;
const uint32_t tailPixels = 0;
if (!mContext->ValidateUnpackPixels(funcName, fullRows, tailPixels, blob.get()))
return;
TexOrSubImageBlob(isSubImage, funcName, target, level, internalFormat, xOffset,
yOffset, zOffset, pi, blob.get());
}
//////////////////////////////////////////////////////////////////////////////////////////
void
WebGLTexture::TexOrSubImageBlob(bool isSubImage, const char* funcName,
TexImageTarget target, GLint level, GLenum internalFormat,
GLint xOffset, GLint yOffset, GLint zOffset,
const webgl::PackingInfo& pi,
const webgl::TexUnpackBlob* blob)
{
if (isSubImage) {
TexSubImage(funcName, target, level, xOffset, yOffset, zOffset, pi, blob);
} else {
TexImage(funcName, target, level, internalFormat, pi, blob);
}
}
//////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////
static bool
ValidateTexImage(WebGLContext* webgl, WebGLTexture* texture, const char* funcName,
TexImageTarget target, GLint level,
WebGLTexture::ImageInfo** const out_imageInfo)
{
// Check level
if (level < 0) {
webgl->ErrorInvalidValue("%s: `level` must be >= 0.", funcName);
return false;
}
if (level >= WebGLTexture::kMaxLevelCount) {
webgl->ErrorInvalidValue("%s: `level` is too large.", funcName);
return false;
}
WebGLTexture::ImageInfo& imageInfo = texture->ImageInfoAt(target, level);
*out_imageInfo = &imageInfo;
return true;
}
// For *TexImage*
bool
WebGLTexture::ValidateTexImageSpecification(const char* funcName, TexImageTarget target,
GLint level, uint32_t width, uint32_t height,
uint32_t depth,
WebGLTexture::ImageInfo** const out_imageInfo)
{
if (mImmutable) {
mContext->ErrorInvalidOperation("%s: Specified texture is immutable.", funcName);
return false;
}
// Do this early to validate `level`.
WebGLTexture::ImageInfo* imageInfo;
if (!ValidateTexImage(mContext, this, funcName, target, level, &imageInfo))
return false;
if (mTarget == LOCAL_GL_TEXTURE_CUBE_MAP &&
width != height)
{
mContext->ErrorInvalidValue("%s: Cube map images must be square.", funcName);
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 mImplMaxTextureSize, which is neither necessarily
* lower nor higher than MAX_TEXTURE_SIZE.
*
* Note that mImplMaxTextureSize must be >= than the advertized MAX_TEXTURE_SIZE.
* For simplicity, we advertize MAX_TEXTURE_SIZE as mImplMaxTextureSize.
*/
uint32_t maxWidthHeight = 0;
uint32_t maxDepth = 0;
MOZ_ASSERT(level <= 31);
switch (target.get()) {
case LOCAL_GL_TEXTURE_2D:
maxWidthHeight = mContext->mImplMaxTextureSize >> level;
maxDepth = 1;
break;
case LOCAL_GL_TEXTURE_3D:
maxWidthHeight = mContext->mImplMax3DTextureSize >> level;
maxDepth = maxWidthHeight;
break;
case LOCAL_GL_TEXTURE_2D_ARRAY:
maxWidthHeight = mContext->mImplMaxTextureSize >> level;
// "The maximum number of layers for two-dimensional array textures (depth)
// must be at least MAX_ARRAY_TEXTURE_LAYERS for all levels."
maxDepth = mContext->mImplMaxArrayTextureLayers;
break;
default: // cube maps
MOZ_ASSERT(IsCubeMap());
maxWidthHeight = mContext->mImplMaxCubeMapTextureSize >> level;
maxDepth = 1;
break;
}
if (width > maxWidthHeight ||
height > maxWidthHeight ||
depth > maxDepth)
{
mContext->ErrorInvalidValue("%s: Requested size at this level is unsupported.",
funcName);
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(width) || !IsPowerOfTwo(height)) {
mContext->ErrorInvalidValue("%s: For level > 0, width and height must be"
" powers of two.",
funcName);
return false;
}
}
}
*out_imageInfo = imageInfo;
return true;
}
// For *TexSubImage*
bool
WebGLTexture::ValidateTexImageSelection(const char* funcName, TexImageTarget target,
GLint level, GLint xOffset, GLint yOffset,
GLint zOffset, uint32_t width, uint32_t height,
uint32_t depth,
WebGLTexture::ImageInfo** const out_imageInfo)
{
// The conformance test wants bad arg checks before imageInfo checks.
if (xOffset < 0 || yOffset < 0 || zOffset < 0) {
mContext->ErrorInvalidValue("%s: Offsets must be >=0.", funcName);
return false;
}
WebGLTexture::ImageInfo* imageInfo;
if (!ValidateTexImage(mContext, this, funcName, target, level, &imageInfo))
return false;
if (!imageInfo->IsDefined()) {
mContext->ErrorInvalidOperation("%s: The specified TexImage has not yet been"
" specified.",
funcName);
return false;
}
const auto totalX = CheckedUint32(xOffset) + width;
const auto totalY = CheckedUint32(yOffset) + height;
const auto totalZ = CheckedUint32(zOffset) + depth;
if (!totalX.isValid() || totalX.value() > imageInfo->mWidth ||
!totalY.isValid() || totalY.value() > imageInfo->mHeight ||
!totalZ.isValid() || totalZ.value() > imageInfo->mDepth)
{
mContext->ErrorInvalidValue("%s: Offset+size must be <= the size of the existing"
" specified image.",
funcName);
return false;
}
*out_imageInfo = imageInfo;
return true;
}
static bool
ValidateCompressedTexUnpack(WebGLContext* webgl, const char* funcName, GLsizei width,
GLsizei height, GLsizei depth,
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(width) / blockWidth;
auto heightInBlocks = CheckedUint32(height) / blockHeight;
if (width % blockWidth) widthInBlocks += 1;
if (height % blockHeight) heightInBlocks += 1;
const CheckedUint32 blocksPerImage = widthInBlocks * heightInBlocks;
const CheckedUint32 bytesPerImage = bytesPerBlock * blocksPerImage;
const CheckedUint32 bytesNeeded = bytesPerImage * depth;
if (!bytesNeeded.isValid()) {
webgl->ErrorOutOfMemory("%s: Overflow while computing the needed buffer size.",
funcName);
return false;
}
if (dataSize != bytesNeeded.value()) {
webgl->ErrorInvalidValue("%s: Provided buffer's size must match expected size."
" (needs %u, has %u)",
funcName, 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, const char* funcName,
TexImageTarget target, GLint level, GLint xOffset,
GLint yOffset, GLint zOffset, uint32_t width,
uint32_t height, uint32_t depth,
WebGLTexture::ImageInfo* imageInfo,
bool* const out_uploadWillInitialize)
{
*out_uploadWillInitialize = false;
if (!imageInfo->IsDataInitialized()) {
const bool isFullUpload = (!xOffset && !yOffset && !zOffset &&
width == imageInfo->mWidth &&
height == imageInfo->mHeight &&
depth == imageInfo->mDepth);
if (isFullUpload) {
*out_uploadWillInitialize = true;
} else {
WebGLContext* webgl = tex->mContext;
webgl->GenerateWarning("%s: Texture has not been initialized prior to a"
" partial upload, forcing the browser to clear it."
" This may be slow.",
funcName);
if (!tex->InitializeImageData(funcName, 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
DoCopyTexImage2D(gl::GLContext* gl, TexImageTarget target, GLint level,
GLenum internalFormat, GLint x, GLint y, GLsizei width, GLsizei height)
{
const GLint border = 0;
gl::GLContext::LocalErrorScope errorScope(*gl);
MOZ_ASSERT(!IsTarget3D(target));
gl->fCopyTexImage2D(target.get(), level, internalFormat, x, y, width, height,
border);
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 char* funcName, WebGLContext* webgl,
TexImageTarget target, uint32_t level,
const webgl::FormatInfo* format, uint32_t width,
uint32_t height, uint32_t depth)
{
const auto fnIsDimValid_S3TC = [level](uint32_t size, uint32_t blockSize) {
if (size % blockSize == 0)
return true;
if (level == 0)
return false;
return (size == 0 || size == 1 || size == 2);
};
switch (format->compression->family) {
case webgl::CompressionFamily::PVRTC:
if (!IsPowerOfTwo(width) || !IsPowerOfTwo(height)) {
webgl->ErrorInvalidValue("%s: %s requires power-of-two width and height.",
funcName, format->name);
return false;
}
break;
case webgl::CompressionFamily::S3TC:
if (!fnIsDimValid_S3TC(width, format->compression->blockWidth) ||
!fnIsDimValid_S3TC(height, format->compression->blockHeight))
{
webgl->ErrorInvalidOperation("%s: %s requires that width and height are"
" block-aligned, or, if level>0, equal to 0, 1,"
" or 2.",
funcName, format->name);
return false;
}
break;
// Default: There are no restrictions on CompressedTexImage.
default: // ATC, ETC1, ES3
break;
}
return true;
}
static bool
ValidateTargetForFormat(const char* funcName, 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."
switch (format->effectiveFormat) {
// TEXTURE_2D_ARRAY but not TEXTURE_3D:
// D and DS formats
case webgl::EffectiveFormat::DEPTH_COMPONENT16:
case webgl::EffectiveFormat::DEPTH_COMPONENT24:
case webgl::EffectiveFormat::DEPTH_COMPONENT32F:
case webgl::EffectiveFormat::DEPTH24_STENCIL8:
case webgl::EffectiveFormat::DEPTH32F_STENCIL8:
// CompressionFamily::ES3
case webgl::EffectiveFormat::COMPRESSED_R11_EAC:
case webgl::EffectiveFormat::COMPRESSED_SIGNED_R11_EAC:
case webgl::EffectiveFormat::COMPRESSED_RG11_EAC:
case webgl::EffectiveFormat::COMPRESSED_SIGNED_RG11_EAC:
case webgl::EffectiveFormat::COMPRESSED_RGB8_ETC2:
case webgl::EffectiveFormat::COMPRESSED_SRGB8_ETC2:
case webgl::EffectiveFormat::COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
case webgl::EffectiveFormat::COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
case webgl::EffectiveFormat::COMPRESSED_RGBA8_ETC2_EAC:
case webgl::EffectiveFormat::COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
// CompressionFamily::S3TC
case webgl::EffectiveFormat::COMPRESSED_RGB_S3TC_DXT1_EXT:
case webgl::EffectiveFormat::COMPRESSED_RGBA_S3TC_DXT1_EXT:
case webgl::EffectiveFormat::COMPRESSED_RGBA_S3TC_DXT3_EXT:
case webgl::EffectiveFormat::COMPRESSED_RGBA_S3TC_DXT5_EXT:
if (target == LOCAL_GL_TEXTURE_3D) {
webgl->ErrorInvalidOperation("%s: Format %s cannot be used with TEXTURE_3D.",
funcName, format->name);
return false;
}
break;
// No 3D targets:
// CompressionFamily::ATC
case webgl::EffectiveFormat::ATC_RGB_AMD:
case webgl::EffectiveFormat::ATC_RGBA_EXPLICIT_ALPHA_AMD:
case webgl::EffectiveFormat::ATC_RGBA_INTERPOLATED_ALPHA_AMD:
// CompressionFamily::PVRTC
case webgl::EffectiveFormat::COMPRESSED_RGB_PVRTC_4BPPV1:
case webgl::EffectiveFormat::COMPRESSED_RGBA_PVRTC_4BPPV1:
case webgl::EffectiveFormat::COMPRESSED_RGB_PVRTC_2BPPV1:
case webgl::EffectiveFormat::COMPRESSED_RGBA_PVRTC_2BPPV1:
// CompressionFamily::ETC1
case webgl::EffectiveFormat::ETC1_RGB8_OES:
if (target == LOCAL_GL_TEXTURE_3D ||
target == LOCAL_GL_TEXTURE_2D_ARRAY)
{
webgl->ErrorInvalidOperation("%s: Format %s cannot be used with TEXTURE_3D or"
" TEXTURE_2D_ARRAY.",
funcName, format->name);
return false;
}
break;
default:
break;
}
return true;
}
void
WebGLTexture::TexStorage(const char* funcName, TexTarget target, GLsizei levels,
GLenum sizedFormat, GLsizei width, GLsizei height, GLsizei depth)
{
// Check levels
if (levels < 1) {
mContext->ErrorInvalidValue("%s: `levels` must be >= 1.", funcName);
return;
}
if (!width || !height || !depth) {
mContext->ErrorInvalidValue("%s: Dimensions must be non-zero.", funcName);
return;
}
const TexImageTarget testTarget = IsCubeMap() ? LOCAL_GL_TEXTURE_CUBE_MAP_POSITIVE_X
: target.get();
const GLint testLevel = 0;
WebGLTexture::ImageInfo* testImageInfo;
if (!ValidateTexImageSpecification(funcName, testTarget, testLevel, width, height,
depth, &testImageInfo))
{
return;
}
MOZ_ASSERT(testImageInfo);
mozilla::Unused << testImageInfo;
auto dstUsage = mContext->mFormatUsage->GetSizedTexUsage(sizedFormat);
if (!dstUsage) {
mContext->ErrorInvalidEnum("%s: Invalid internalformat: 0x%04x", funcName,
sizedFormat);
return;
}
auto dstFormat = dstUsage->format;
if (!ValidateTargetForFormat(funcName, mContext, testTarget, dstFormat))
return;
if (dstFormat->compression) {
if (!ValidateCompressedTexImageRestrictions(funcName, mContext, testTarget,
testLevel, dstFormat, width, height,
depth))
{
return;
}
}
////////////////////////////////////
const auto lastLevel = levels - 1;
MOZ_ASSERT(lastLevel <= 31, "Right-shift is only defined for bits-1.");
const uint32_t lastLevelWidth = uint32_t(width) >> lastLevel;
const uint32_t lastLevelHeight = uint32_t(height) >> lastLevel;
const uint32_t lastLevelDepth = uint32_t(depth) >> lastLevel;
// If these are all zero, then some earlier level was the final 1x1x1 level.
if (!lastLevelWidth && !lastLevelHeight && !lastLevelDepth) {
mContext->ErrorInvalidOperation("%s: Too many levels requested for the given"
" dimensions. (levels: %u, width: %u, height: %u,"
" depth: %u)",
funcName, levels, width, height, depth);
return;
}
////////////////////////////////////
// Do the thing!
mContext->gl->MakeCurrent();
GLenum error = DoTexStorage(mContext->gl, target.get(), levels, sizedFormat, width,
height, depth);
if (error == LOCAL_GL_OUT_OF_MEMORY) {
mContext->ErrorOutOfMemory("%s: Ran out of memory during texture allocation.",
funcName);
return;
}
if (error) {
MOZ_RELEASE_ASSERT(false, "GFX: We should have caught all other errors.");
mContext->ErrorInvalidOperation("%s: Unexpected error during texture allocation.",
funcName);
return;
}
////////////////////////////////////
// Update our specification data.
const bool isDataInitialized = false;
const WebGLTexture::ImageInfo newInfo(dstUsage, width, height, depth,
isDataInitialized);
SetImageInfosAtLevel(0, newInfo);
PopulateMipChain(0, levels-1);
mImmutable = true;
mImmutableLevelCount = levels;
}
////////////////////////////////////////
// Tex(Sub)Image
void
WebGLTexture::TexImage(const char* funcName, TexImageTarget target, GLint level,
GLenum internalFormat, const webgl::PackingInfo& pi,
const webgl::TexUnpackBlob* blob)
{
////////////////////////////////////
// Get dest info
WebGLTexture::ImageInfo* imageInfo;
if (!ValidateTexImageSpecification(funcName, target, level, blob->mWidth,
blob->mHeight, blob->mDepth, &imageInfo))
{
return;
}
MOZ_ASSERT(imageInfo);
const auto& fua = mContext->mFormatUsage;
if (!fua->IsInternalFormatEnumValid(internalFormat)) {
mContext->ErrorInvalidValue("%s: Invalid internalformat: 0x%04x",
funcName, internalFormat);
return;
}
auto dstUsage = fua->GetSizedTexUsage(internalFormat);
if (!dstUsage) {
if (internalFormat != 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."
*/
mContext->ErrorInvalidOperation("%s: Unsized internalFormat must match"
" unpack format.",
funcName);
return;
}
dstUsage = fua->GetUnsizedTexUsage(pi);
}
if (!dstUsage) {
mContext->ErrorInvalidOperation("%s: Invalid internalformat/format/type:"
" 0x%04x/0x%04x/0x%04x",
funcName, internalFormat, pi.format, pi.type);
return;
}
const webgl::DriverUnpackInfo* driverUnpackInfo;
if (!dstUsage->IsUnpackValid(pi, &driverUnpackInfo)) {
mContext->ErrorInvalidOperation("%s: Mismatched internalFormat and format/type:"
" 0x%04x and 0x%04x/0x%04x",
funcName, internalFormat, pi.format, pi.type);
return;
}
////////////////////////////////////
// Check that source and dest info are compatible
auto dstFormat = dstUsage->format;
if (!ValidateTargetForFormat(funcName, mContext, target, dstFormat))
return;
if (!mContext->IsWebGL2() && dstFormat->d) {
if (target != LOCAL_GL_TEXTURE_2D ||
blob->HasData() ||
level != 0)
{
mContext->ErrorInvalidOperation("%s: With format %s, this function may only"
" be called with target=TEXTURE_2D,"
" data=null, and level=0.",
funcName, dstFormat->name);
return;
}
}
////////////////////////////////////
// Do the thing!
MOZ_ALWAYS_TRUE( mContext->gl->MakeCurrent() );
MOZ_ASSERT(mContext->gl->IsCurrent());
// It's tempting to do allocation first, and TexSubImage second, but this is generally
// slower.
const ImageInfo newImageInfo(dstUsage, blob->mWidth, blob->mHeight, blob->mDepth,
blob->HasData());
const bool isSubImage = false;
const bool needsRespec = (imageInfo->mWidth != newImageInfo.mWidth ||
imageInfo->mHeight != newImageInfo.mHeight ||
imageInfo->mDepth != newImageInfo.mDepth ||
imageInfo->mFormat != newImageInfo.mFormat);
const GLint xOffset = 0;
const GLint yOffset = 0;
const GLint zOffset = 0;
GLenum glError;
blob->TexOrSubImage(isSubImage, needsRespec, funcName, this, target, level,
driverUnpackInfo, xOffset, yOffset, zOffset, &glError);
if (glError == LOCAL_GL_OUT_OF_MEMORY) {
mContext->ErrorOutOfMemory("%s: Driver ran out of memory during upload.",
funcName);
return;
}
if (glError) {
mContext->ErrorInvalidOperation("%s: Unexpected error during upload: 0x%04x",
funcName, glError);
printf_stderr("%s: dui: %x/%x/%x\n", funcName, driverUnpackInfo->internalFormat,
driverUnpackInfo->unpackFormat, driverUnpackInfo->unpackType);
MOZ_ASSERT(false, "Unexpected GL error.");
return;
}
////////////////////////////////////
// Update our specification data.
SetImageInfo(imageInfo, newImageInfo);
}
void
WebGLTexture::TexSubImage(const char* funcName, TexImageTarget target, GLint level,
GLint xOffset, GLint yOffset, GLint zOffset,
const webgl::PackingInfo& pi, const webgl::TexUnpackBlob* blob)
{
////////////////////////////////////
// Get dest info
WebGLTexture::ImageInfo* imageInfo;
if (!ValidateTexImageSelection(funcName, target, level, xOffset, yOffset, zOffset,
blob->mWidth, blob->mHeight, blob->mDepth, &imageInfo))
{
return;
}
MOZ_ASSERT(imageInfo);
auto dstUsage = imageInfo->mFormat;
auto dstFormat = dstUsage->format;
if (dstFormat->compression) {
mContext->ErrorInvalidEnum("%s: Specified TexImage must not be compressed.",
funcName);
return;
}
if (!mContext->IsWebGL2() && dstFormat->d) {
mContext->ErrorInvalidOperation("%s: Function may not be called on a texture of"
" format %s.",
funcName, dstFormat->name);
return;
}
////////////////////////////////////
// Get source info
const webgl::DriverUnpackInfo* driverUnpackInfo;
if (!dstUsage->IsUnpackValid(pi, &driverUnpackInfo)) {
mContext->ErrorInvalidOperation("%s: Mismatched internalFormat and format/type:"
" %s and 0x%04x/0x%04x",
funcName, dstFormat->name, pi.format, pi.type);
return;
}
////////////////////////////////////
// Do the thing!
mContext->gl->MakeCurrent();
bool uploadWillInitialize;
if (!EnsureImageDataInitializedForUpload(this, funcName, target, level, xOffset,
yOffset, zOffset, blob->mWidth,
blob->mHeight, blob->mDepth, imageInfo,
&uploadWillInitialize))
{
return;
}
const bool isSubImage = true;
const bool needsRespec = false;
GLenum glError;
blob->TexOrSubImage(isSubImage, needsRespec, funcName, this, target, level,
driverUnpackInfo, xOffset, yOffset, zOffset, &glError);
if (glError == LOCAL_GL_OUT_OF_MEMORY) {
mContext->ErrorOutOfMemory("%s: Driver ran out of memory during upload.",
funcName);
return;
}
if (glError) {
mContext->ErrorInvalidOperation("%s: Unexpected error during upload: 0x04x",
funcName, glError);
MOZ_ASSERT(false, "Unexpected GL error.");
return;
}
////////////////////////////////////
// Update our specification data?
if (uploadWillInitialize) {
imageInfo->SetIsDataInitialized(true, this);
}
}
////////////////////////////////////////
// CompressedTex(Sub)Image
void
WebGLTexture::CompressedTexImage(const char* funcName, TexImageTarget target, GLint level,
GLenum internalFormat, GLsizei rawWidth,
GLsizei rawHeight, GLsizei rawDepth, GLint border,
const dom::ArrayBufferView& view)
{
uint32_t width, height, depth;
if (!ValidateExtents(mContext, funcName, rawWidth, rawHeight, rawDepth, border,
&width, &height, &depth))
{
return;
}
////////////////////////////////////
// Get dest info
WebGLTexture::ImageInfo* imageInfo;
if (!ValidateTexImageSpecification(funcName, target, level, width, height, depth,
&imageInfo))
{
return;
}
MOZ_ASSERT(imageInfo);
auto usage = mContext->mFormatUsage->GetSizedTexUsage(internalFormat);
if (!usage) {
mContext->ErrorInvalidEnum("%s: Invalid internalFormat: 0x%04x", funcName,
internalFormat);
return;
}
auto format = usage->format;
if (!format->compression) {
mContext->ErrorInvalidEnum("%s: Specified internalFormat must be compressed.",
funcName);
return;
}
if (!ValidateTargetForFormat(funcName, mContext, target, format))
return;
////////////////////////////////////
// Get source info
view.ComputeLengthAndData();
const void* data = view.DataAllowShared();
size_t dataSize = view.LengthAllowShared();
if (!ValidateCompressedTexUnpack(mContext, funcName, width, height, depth, format,
dataSize))
{
return;
}
////////////////////////////////////
// Check that source is compatible with dest
if (!ValidateCompressedTexImageRestrictions(funcName, mContext, target, level, format,
width, height, depth))
{
return;
}
////////////////////////////////////
// Do the thing!
mContext->gl->MakeCurrent();
// Warning: Possibly shared memory. See bug 1225033.
GLenum error = DoCompressedTexImage(mContext->gl, target, level, internalFormat,
width, height, depth, dataSize, data);
if (error == LOCAL_GL_OUT_OF_MEMORY) {
mContext->ErrorOutOfMemory("%s: Ran out of memory during upload.", funcName);
return;
}
if (error) {
MOZ_RELEASE_ASSERT(false, "GFX: We should have caught all other errors.");
mContext->GenerateWarning("%s: Unexpected error during texture upload. Context"
" lost.",
funcName);
mContext->ForceLoseContext();
return;
}
////////////////////////////////////
// Update our specification data.
const bool isDataInitialized = true;
const ImageInfo newImageInfo(usage, width, height, depth, isDataInitialized);
SetImageInfo(imageInfo, newImageInfo);
}
static inline bool
IsSubImageBlockAligned(const webgl::CompressedFormatInfo* compression,
const WebGLTexture::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;
}
void
WebGLTexture::CompressedTexSubImage(const char* funcName, TexImageTarget target,
GLint level, GLint xOffset, GLint yOffset,
GLint zOffset, GLsizei rawWidth, GLsizei rawHeight,
GLsizei rawDepth, GLenum sizedUnpackFormat,
const dom::ArrayBufferView& view)
{
uint32_t width, height, depth;
if (!ValidateExtents(mContext, funcName, rawWidth, rawHeight, rawDepth, 0, &width,
&height, &depth))
{
return;
}
////////////////////////////////////
// Get dest info
WebGLTexture::ImageInfo* imageInfo;
if (!ValidateTexImageSelection(funcName, target, level, xOffset, yOffset, zOffset,
width, height, depth, &imageInfo))
{
return;
}
MOZ_ASSERT(imageInfo);
auto dstUsage = imageInfo->mFormat;
auto dstFormat = dstUsage->format;
////////////////////////////////////
// Get source info
view.ComputeLengthAndData();
size_t dataSize = view.LengthAllowShared();
const void* data = view.DataAllowShared();
auto srcUsage = mContext->mFormatUsage->GetSizedTexUsage(sizedUnpackFormat);
if (!srcUsage->format->compression) {
mContext->ErrorInvalidEnum("%s: Specified format must be compressed.", funcName);
return;
}
if (srcUsage != dstUsage) {
mContext->ErrorInvalidOperation("%s: `format` must match the format of the"
" existing texture image.",
funcName);
return;
}
auto format = srcUsage->format;
MOZ_ASSERT(format == dstFormat);
if (!ValidateCompressedTexUnpack(mContext, funcName, width, height, depth, format,
dataSize))
{
return;
}
////////////////////////////////////
// Check that source is compatible with dest
switch (format->compression->family) {
// Forbidden:
case webgl::CompressionFamily::ETC1:
case webgl::CompressionFamily::ATC:
mContext->ErrorInvalidOperation("%s: Format does not allow sub-image"
" updates.", funcName);
return;
// Block-aligned:
case webgl::CompressionFamily::ES3: // Yes, the ES3 formats don't match the ES3
case webgl::CompressionFamily::S3TC: // default behavior.
if (!IsSubImageBlockAligned(dstFormat->compression, imageInfo, xOffset, yOffset,
width, height))
{
mContext->ErrorInvalidOperation("%s: Format requires block-aligned sub-image"
" updates.",
funcName);
return;
}
break;
// Full-only: (The ES3 default)
default: // PVRTC
if (xOffset || yOffset ||
uint32_t(width) != imageInfo->mWidth ||
uint32_t(height) != imageInfo->mHeight)
{
mContext->ErrorInvalidOperation("%s: Format does not allow partial sub-image"
" updates.",
funcName);
return;
}
break;
}
////////////////////////////////////
// Do the thing!
mContext->gl->MakeCurrent();
bool uploadWillInitialize;
if (!EnsureImageDataInitializedForUpload(this, funcName, target, level, xOffset,
yOffset, zOffset, width, height, depth,
imageInfo, &uploadWillInitialize))
{
return;
}
// Warning: Possibly shared memory. See bug 1225033.
GLenum error = DoCompressedTexSubImage(mContext->gl, target, level, xOffset, yOffset,
zOffset, width, height, depth,
sizedUnpackFormat, dataSize, data);
if (error == LOCAL_GL_OUT_OF_MEMORY) {
mContext->ErrorOutOfMemory("%s: Ran out of memory during upload.", funcName);
return;
}
if (error) {
MOZ_RELEASE_ASSERT(false, "GFX: We should have caught all other errors.");
mContext->GenerateWarning("%s: Unexpected error during texture upload. Context"
" lost.",
funcName);
mContext->ForceLoseContext();
return;
}
////////////////////////////////////
// Update our specification data?
if (uploadWillInitialize) {
imageInfo->SetIsDataInitialized(true, this);
}
}
////////////////////////////////////////
// CopyTex(Sub)Image
static bool
ValidateCopyTexImageFormats(WebGLContext* webgl, const char* funcName,
const webgl::FormatInfo* srcFormat,
const webgl::FormatInfo* dstFormat)
{
MOZ_ASSERT(!srcFormat->compression);
if (dstFormat->compression) {
webgl->ErrorInvalidEnum("%s: Specified destination must not have a compressed"
" format.",
funcName);
return false;
}
if (dstFormat->effectiveFormat == webgl::EffectiveFormat::RGB9_E5) {
webgl->ErrorInvalidOperation("%s: RGB9_E5 is an invalid destination for"
" CopyTex(Sub)Image. (GLES 3.0.4 p145)",
funcName);
return false;
}
if (!DoChannelsMatchForCopyTexImage(srcFormat, dstFormat)) {
webgl->ErrorInvalidOperation("%s: Destination channels must be compatible with"
" source channels. (GLES 3.0.4 p140 Table 3.16)",
funcName);
return false;
}
return true;
}
////////////////////////////////////////////////////////////////////////////////
class ScopedCopyTexImageSource
{
WebGLContext* const mWebGL;
GLuint mRB;
GLuint mFB;
public:
ScopedCopyTexImageSource(WebGLContext* webgl, const char* funcName, uint32_t srcWidth,
uint32_t srcHeight, const webgl::FormatInfo* srcFormat,
const webgl::FormatUsageInfo* dstUsage);
~ScopedCopyTexImageSource();
};
ScopedCopyTexImageSource::ScopedCopyTexImageSource(WebGLContext* webgl,
const char* funcName,
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("%s: Copying to a LUMINANCE, ALPHA, or LUMINANCE_ALPHA"
" is deprecated, and has severely reduced performance"
" on some platforms.",
funcName);
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;
break;
}
if (webgl->IsExtensionEnabled(WebGLExtensionID::EXT_color_buffer_half_float)) {
sizedFormat = LOCAL_GL_RGBA16F;
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;
gl->fGenRenderbuffers(1, &rgbaRB);
gl::ScopedBindRenderbuffer scopedRB(gl, rgbaRB);
gl->fRenderbufferStorage(LOCAL_GL_RENDERBUFFER, sizedFormat, srcWidth, srcHeight);
GLuint rgbaFB = 0;
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.");
}
// Restore RB binding.
scopedRB.Unwrap(); // This function should really have a better name.
// Draw-blit rgbaTex into rgbaFB.
const gfx::IntSize srcSize(srcWidth, srcHeight);
gl->BlitHelper()->DrawBlitTextureToFramebuffer(scopedTex.Texture(), rgbaFB,
srcSize, srcSize);
// Restore Tex2D binding and destroy the temp tex.
scopedBindTex.Unwrap();
scopedTex.Unwrap();
// Leave RB and FB alive, and FB bound.
mRB = rgbaRB;
mFB = rgbaFB;
}
template<typename T>
static inline GLenum
ToGLHandle(const T& obj)
{
return (obj ? obj->mGLName : 0);
}
ScopedCopyTexImageSource::~ScopedCopyTexImageSource()
{
if (!mFB) {
MOZ_ASSERT(!mRB);
return;
}
MOZ_ASSERT(mRB);
gl::GLContext* gl = mWebGL->gl;
// If we're swizzling, it's because we're on a GL core (3.2+) profile, which has
// split framebuffer support.
gl->fBindFramebuffer(LOCAL_GL_DRAW_FRAMEBUFFER,
ToGLHandle(mWebGL->mBoundDrawFramebuffer));
gl->fBindFramebuffer(LOCAL_GL_READ_FRAMEBUFFER,
ToGLHandle(mWebGL->mBoundReadFramebuffer));
gl->fDeleteFramebuffers(1, &mFB);
gl->fDeleteRenderbuffers(1, &mRB);
}
////////////////////////////////////////////////////////////////////////////////
static bool
GetUnsizedFormatForCopy(GLenum internalFormat, webgl::UnsizedFormat* const out)
{
switch (internalFormat) {
case LOCAL_GL_RED: *out = webgl::UnsizedFormat::R; break;
case LOCAL_GL_RG: *out = webgl::UnsizedFormat::RG; break;
case LOCAL_GL_RGB: *out = webgl::UnsizedFormat::RGB; break;
case LOCAL_GL_RGBA: *out = webgl::UnsizedFormat::RGBA; break;
case LOCAL_GL_LUMINANCE: *out = webgl::UnsizedFormat::L; break;
case LOCAL_GL_ALPHA: *out = webgl::UnsizedFormat::A; break;
case LOCAL_GL_LUMINANCE_ALPHA: *out = webgl::UnsizedFormat::LA; break;
default:
return false;
}
return true;
}
static const webgl::FormatUsageInfo*
ValidateCopyDestUsage(const char* funcName, WebGLContext* webgl,
const webgl::FormatInfo* srcFormat, GLenum internalFormat)
{
const auto& fua = webgl->mFormatUsage;
auto dstUsage = fua->GetSizedTexUsage(internalFormat);
if (!dstUsage) {
// Ok, maybe it's unsized.
webgl::UnsizedFormat unsizedFormat;
if (!GetUnsizedFormatForCopy(internalFormat, &unsizedFormat)) {
webgl->ErrorInvalidEnum("%s: Unrecongnized internalFormat 0x%04x.", funcName,
internalFormat);
return nullptr;
}
const auto dstFormat = srcFormat->GetCopyDecayFormat(unsizedFormat);
if (dstFormat) {
dstUsage = fua->GetUsage(dstFormat->effectiveFormat);
}
if (!dstUsage) {
webgl->ErrorInvalidOperation("%s: 0x%04x is not a valid unsized format for"
" source format %s.",
funcName, internalFormat, srcFormat->name);
return nullptr;
}
return dstUsage;
}
// Alright, it's sized.
const auto dstFormat = dstUsage->format;
if (dstFormat->componentType != srcFormat->componentType) {
webgl->ErrorInvalidOperation("%s: For sized internalFormats, source and dest"
" component types must match. (source: %s, dest:"
" %s)",
funcName, srcFormat->name, dstFormat->name);
return nullptr;
}
bool componentSizesMatch = true;
if (dstFormat->r) {
componentSizesMatch &= (dstFormat->r == srcFormat->r);
}
if (dstFormat->g) {
componentSizesMatch &= (dstFormat->g == srcFormat->g);
}
if (dstFormat->b) {
componentSizesMatch &= (dstFormat->b == srcFormat->b);
}
if (dstFormat->a) {
componentSizesMatch &= (dstFormat->a == srcFormat->a);
}
if (!componentSizesMatch) {
webgl->ErrorInvalidOperation("%s: For sized internalFormats, source and dest"
" component sizes must match exactly. (source: %s,"
" dest: %s)",
funcName, srcFormat->name, dstFormat->name);
return nullptr;
}
return dstUsage;
}
bool
WebGLTexture::ValidateCopyTexImageForFeedback(const char* funcName, uint32_t level) const
{
const auto& fb = mContext->mBoundReadFramebuffer;
if (fb) {
const auto readBuffer = fb->ReadBufferMode();
MOZ_ASSERT(readBuffer != LOCAL_GL_NONE);
const uint32_t colorAttachment = readBuffer - LOCAL_GL_COLOR_ATTACHMENT0;
const auto& attach = fb->ColorAttachment(colorAttachment);
if (attach.Texture() == this &&
uint32_t(attach.MipLevel()) == level)
{
// Note that the TexImageTargets *don't* have to match for this to be
// undefined per GLES 3.0.4 p211, thus an INVALID_OP in WebGL.
mContext->ErrorInvalidOperation("%s: Feedback loop detected, as this texture"
" is already attached to READ_FRAMEBUFFER's"
" READ_BUFFER-selected COLOR_ATTACHMENT%u.",
funcName, colorAttachment);
return false;
}
}
return true;
}
// There is no CopyTexImage3D.
void
WebGLTexture::CopyTexImage2D(TexImageTarget target, GLint level, GLenum internalFormat,
GLint x, GLint y, GLsizei rawWidth, GLsizei rawHeight,
GLint border)
{
const char funcName[] = "copyTexImage2D";
////////////////////////////////////
// Get dest info
uint32_t width, height, depth;
if (!ValidateExtents(mContext, funcName, rawWidth, rawHeight, 1, border, &width,
&height, &depth))
{
return;
}
WebGLTexture::ImageInfo* imageInfo;
if (!ValidateTexImageSpecification(funcName, target, level, width, height, depth,
&imageInfo))
{
return;
}
MOZ_ASSERT(imageInfo);
////////////////////////////////////
// Get source info
const webgl::FormatUsageInfo* srcUsage;
uint32_t srcWidth;
uint32_t srcHeight;
if (!mContext->ValidateCurFBForRead(funcName, &srcUsage, &srcWidth, &srcHeight))
return;
auto srcFormat = srcUsage->format;
if (!ValidateCopyTexImageForFeedback(funcName, level))
return;
////////////////////////////////////
// Check that source and dest info are compatible
const auto dstUsage = ValidateCopyDestUsage(funcName, mContext, srcFormat,
internalFormat);
if (!dstUsage)
return;
const auto dstFormat = dstUsage->format;
if (!ValidateTargetForFormat(funcName, mContext, target, dstFormat))
return;
if (!mContext->IsWebGL2() && dstFormat->d) {
mContext->ErrorInvalidOperation("%s: Function may not be called with format %s.",
funcName, dstFormat->name);
return;
}
if (!ValidateCopyTexImageFormats(mContext, funcName, srcFormat, dstFormat))
return;
////////////////////////////////////
// Do the thing!
gl::GLContext* gl = mContext->gl;
gl->MakeCurrent();
ScopedCopyTexImageSource maybeSwizzle(mContext, funcName, srcWidth, srcHeight,
srcFormat, dstUsage);
uint32_t readX, readY;
uint32_t writeX, writeY;
uint32_t rwWidth, rwHeight;
Intersect(srcWidth, x, width, &readX, &writeX, &rwWidth);
Intersect(srcHeight, y, height, &readY, &writeY, &rwHeight);
GLenum error;
if (rwWidth == uint32_t(width) && rwHeight == uint32_t(height)) {
error = DoCopyTexImage2D(gl, target, level, internalFormat, x, y, width, height);
} else {
// 1. Zero the texture data.
// 2. CopyTexSubImage the subrect.
const bool respecifyTexture = true;
const uint8_t zOffset = 0;
if (!ZeroTextureData(mContext, funcName, respecifyTexture, mGLName, target, level,
dstUsage, 0, 0, zOffset, width, height, depth))
{
mContext->ErrorOutOfMemory("%s: Failed to zero texture data.", funcName);
MOZ_ASSERT(false, "Failed to zero texture data.");
return;
}
if (!rwWidth || !rwHeight) {
// There aren't any, so we're 'done'.
mContext->DummyReadFramebufferOperation(funcName);
return;
}
error = DoCopyTexSubImage(gl, target, level, writeX, writeY, zOffset, readX,
readY, rwWidth, rwHeight);
}
if (error == LOCAL_GL_OUT_OF_MEMORY) {
mContext->ErrorOutOfMemory("%s: Ran out of memory during texture copy.",
funcName);
return;
}
if (error) {
MOZ_RELEASE_ASSERT(false, "GFX: We should have caught all other errors.");
mContext->GenerateWarning("%s: Unexpected error during texture copy. Context"
" lost.",
funcName);
mContext->ForceLoseContext();
return;
}
////////////////////////////////////
// Update our specification data.
const bool isDataInitialized = true;
const ImageInfo newImageInfo(dstUsage, width, height, depth, isDataInitialized);
SetImageInfo(imageInfo, newImageInfo);
}
void
WebGLTexture::CopyTexSubImage(const char* funcName, TexImageTarget target, GLint level,
GLint xOffset, GLint yOffset, GLint zOffset, GLint x,
GLint y, GLsizei rawWidth, GLsizei rawHeight)
{
uint32_t width, height, depth;
if (!ValidateExtents(mContext, funcName, rawWidth, rawHeight, 1, 0, &width,
&height, &depth))
{
return;
}
////////////////////////////////////
// Get dest info
WebGLTexture::ImageInfo* imageInfo;
if (!ValidateTexImageSelection(funcName, target, level, xOffset, yOffset, zOffset,
width, height, depth, &imageInfo))
{
return;
}
MOZ_ASSERT(imageInfo);
auto dstUsage = imageInfo->mFormat;
MOZ_ASSERT(dstUsage);
auto dstFormat = dstUsage->format;
if (!mContext->IsWebGL2() && dstFormat->d) {
mContext->ErrorInvalidOperation("%s: Function may not be called on a texture of"
" format %s.",
funcName, dstFormat->name);
return;
}
////////////////////////////////////
// Get source info
const webgl::FormatUsageInfo* srcUsage;
uint32_t srcWidth;
uint32_t srcHeight;
if (!mContext->ValidateCurFBForRead(funcName, &srcUsage, &srcWidth, &srcHeight))
return;
auto srcFormat = srcUsage->format;
if (!ValidateCopyTexImageForFeedback(funcName, level))
return;
////////////////////////////////////
// Check that source and dest info are compatible
if (!ValidateCopyTexImageFormats(mContext, funcName, srcFormat, dstFormat))
return;
////////////////////////////////////
// Do the thing!
mContext->gl->MakeCurrent();
ScopedCopyTexImageSource maybeSwizzle(mContext, funcName, srcWidth, srcHeight,
srcFormat, dstUsage);
uint32_t readX, readY;
uint32_t writeX, writeY;
uint32_t rwWidth, rwHeight;
Intersect(srcWidth, x, width, &readX, &writeX, &rwWidth);
Intersect(srcHeight, y, height, &readY, &writeY, &rwHeight);
if (!rwWidth || !rwHeight) {
// There aren't any, so we're 'done'.
mContext->DummyReadFramebufferOperation(funcName);
return;
}
bool uploadWillInitialize;
if (!EnsureImageDataInitializedForUpload(this, funcName, target, level, xOffset,
yOffset, zOffset, width, height, depth,
imageInfo, &uploadWillInitialize))
{
return;
}
GLenum error = DoCopyTexSubImage(mContext->gl, target, level, xOffset + writeX,
yOffset + writeY, zOffset, readX, readY, rwWidth,
rwHeight);
if (error == LOCAL_GL_OUT_OF_MEMORY) {
mContext->ErrorOutOfMemory("%s: Ran out of memory during texture copy.",
funcName);
return;
}
if (error) {
MOZ_RELEASE_ASSERT(false, "GFX: We should have caught all other errors.");
mContext->GenerateWarning("%s: Unexpected error during texture copy. Context"
" lost.",
funcName);
mContext->ForceLoseContext();
return;
}
////////////////////////////////////
// Update our specification data?
if (uploadWillInitialize) {
imageInfo->SetIsDataInitialized(true, this);
}
}
} // namespace mozilla
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