bool
BlobSet::ExpandBufferSize(uint64_t aSize)
{
if (mDataBufferLen >= mDataLen + aSize) {
mDataLen += aSize;
return true;
}
// Start at 1 or we'll loop forever.
CheckedUint32 bufferLen =
std::max<uint32_t>(static_cast<uint32_t>(mDataBufferLen), 1);
while (bufferLen.isValid() && bufferLen.value() < mDataLen + aSize) {
bufferLen *= 2;
}
if (!bufferLen.isValid()) {
return false;
}
void* data = realloc(mData, bufferLen.value());
if (!data) {
return false;
}
mData = data;
mDataBufferLen = bufferLen.value();
mDataLen += aSize;
return true;
}
bool ExpandBufferSize(PRUint64 aSize)
{
if (mDataBufferLen >= mDataLen + aSize) {
mDataLen += aSize;
return true;
}
// Start at 1 or we'll loop forever.
CheckedUint32 bufferLen = NS_MAX<PRUint32>(mDataBufferLen, 1);
while (bufferLen.valid() && bufferLen.value() < mDataLen + aSize)
bufferLen *= 2;
if (!bufferLen.valid())
return false;
// PR_ memory functions are still fallible
void* data = PR_Realloc(mData, bufferLen.value());
if (!data)
return false;
mData = data;
mDataBufferLen = bufferLen.value();
mDataLen += aSize;
return true;
}
bool
nsAttrAndChildArray::AddAttrSlot()
{
uint32_t slotCount = AttrSlotCount();
uint32_t childCount = ChildCount();
CheckedUint32 size = slotCount;
size += 1;
size *= ATTRSIZE;
size += childCount;
if (!size.isValid()) {
return false;
}
// Grow buffer if needed
if (!(mImpl && mImpl->mBufferSize >= size.value()) &&
!GrowBy(ATTRSIZE)) {
return false;
}
void** offset = mImpl->mBuffer + slotCount * ATTRSIZE;
if (childCount > 0) {
memmove(&ATTRS(mImpl)[slotCount + 1], &ATTRS(mImpl)[slotCount],
childCount * sizeof(nsIContent*));
}
SetAttrSlotCount(slotCount + 1);
offset[0] = nullptr;
offset[1] = nullptr;
return true;
}
bool
nsAttrAndChildArray::GrowBy(uint32_t aGrowSize)
{
CheckedUint32 size = 0;
if (mImpl) {
size += mImpl->mBufferSize;
size += NS_IMPL_EXTRA_SIZE;
if (!size.isValid()) {
return false;
}
}
CheckedUint32 minSize = size.value();
minSize += aGrowSize;
if (!minSize.isValid()) {
return false;
}
if (minSize.value() <= ATTRCHILD_ARRAY_LINEAR_THRESHOLD) {
do {
size += ATTRCHILD_ARRAY_GROWSIZE;
if (!size.isValid()) {
return false;
}
} while (size.value() < minSize.value());
}
else {
uint32_t shift = mozilla::CeilingLog2(minSize.value());
if (shift >= 32) {
return false;
}
size = 1u << shift;
}
bool needToInitialize = !mImpl;
CheckedUint32 neededSize = size;
neededSize *= sizeof(void*);
if (!neededSize.isValid()) {
return false;
}
Impl* newImpl = static_cast<Impl*>(realloc(mImpl, neededSize.value()));
NS_ENSURE_TRUE(newImpl, false);
mImpl = newImpl;
// Set initial counts if we didn't have a buffer before
if (needToInitialize) {
mImpl->mMappedAttrs = nullptr;
SetAttrSlotAndChildCount(0, 0);
}
mImpl->mBufferSize = size.value() - NS_IMPL_EXTRA_SIZE;
return true;
}
nsresult nsRawReader::Seek(int64_t aTime, int64_t aStartTime, int64_t aEndTime, int64_t aCurrentTime)
{
NS_ASSERTION(mDecoder->OnDecodeThread(),
"Should be on decode thread.");
MediaResource *resource = mDecoder->GetResource();
NS_ASSERTION(resource, "Decoder has no media resource");
uint32_t frame = mCurrentFrame;
if (aTime >= UINT_MAX)
return NS_ERROR_FAILURE;
mCurrentFrame = aTime * mFrameRate / USECS_PER_S;
CheckedUint32 offset = CheckedUint32(mCurrentFrame) * mFrameSize;
offset += sizeof(nsRawVideoHeader);
NS_ENSURE_TRUE(offset.isValid(), NS_ERROR_FAILURE);
nsresult rv = resource->Seek(nsISeekableStream::NS_SEEK_SET, offset.value());
NS_ENSURE_SUCCESS(rv, rv);
mVideoQueue.Erase();
while(mVideoQueue.GetSize() == 0) {
bool keyframeSkip = false;
if (!DecodeVideoFrame(keyframeSkip, 0)) {
mCurrentFrame = frame;
return NS_ERROR_FAILURE;
}
{
mozilla::ReentrantMonitorAutoEnter autoMonitor(mDecoder->GetReentrantMonitor());
if (mDecoder->GetDecodeState() ==
nsBuiltinDecoderStateMachine::DECODER_STATE_SHUTDOWN) {
mCurrentFrame = frame;
return NS_ERROR_FAILURE;
}
}
nsAutoPtr<VideoData> video(mVideoQueue.PeekFront());
if (video && video->mEndTime < aTime) {
mVideoQueue.PopFront();
video = nullptr;
} else {
video.forget();
}
}
return NS_OK;
}
nsresult RawReader::SeekInternal(int64_t aTime)
{
NS_ASSERTION(mDecoder->OnDecodeThread(),
"Should be on decode thread.");
MediaResource *resource = mDecoder->GetResource();
NS_ASSERTION(resource, "Decoder has no media resource");
uint32_t frame = mCurrentFrame;
if (aTime >= UINT_MAX)
return NS_ERROR_FAILURE;
mCurrentFrame = aTime * mFrameRate / USECS_PER_S;
CheckedUint32 offset = CheckedUint32(mCurrentFrame) * mFrameSize;
offset += sizeof(RawVideoHeader);
NS_ENSURE_TRUE(offset.isValid(), NS_ERROR_FAILURE);
nsresult rv = resource->Seek(nsISeekableStream::NS_SEEK_SET, offset.value());
NS_ENSURE_SUCCESS(rv, rv);
mVideoQueue.Reset();
while(mVideoQueue.GetSize() == 0) {
bool keyframeSkip = false;
if (!DecodeVideoFrame(keyframeSkip, 0)) {
mCurrentFrame = frame;
return NS_ERROR_FAILURE;
}
{
ReentrantMonitorAutoEnter autoMonitor(mDecoder->GetReentrantMonitor());
if (mDecoder->IsShutdown()) {
mCurrentFrame = frame;
return NS_ERROR_FAILURE;
}
}
if (mVideoQueue.PeekFront() && mVideoQueue.PeekFront()->GetEndTime() < aTime) {
nsRefPtr<VideoData> releaseMe = mVideoQueue.PopFront();
}
}
return NS_OK;
}
VideoData* VideoData::Create(VideoInfo& aInfo,
ImageContainer* aContainer,
int64_t aOffset,
int64_t aTime,
int64_t aEndTime,
const YCbCrBuffer& aBuffer,
bool aKeyframe,
int64_t aTimecode,
nsIntRect aPicture)
{
if (!aContainer) {
// Create a dummy VideoData with no image. This gives us something to
// send to media streams if necessary.
nsAutoPtr<VideoData> v(new VideoData(aOffset,
aTime,
aEndTime,
aKeyframe,
aTimecode,
aInfo.mDisplay));
return v.forget();
}
// The following situation should never happen unless there is a bug
// in the decoder
if (aBuffer.mPlanes[1].mWidth != aBuffer.mPlanes[2].mWidth ||
aBuffer.mPlanes[1].mHeight != aBuffer.mPlanes[2].mHeight) {
NS_ERROR("C planes with different sizes");
return nullptr;
}
// The following situations could be triggered by invalid input
if (aPicture.width <= 0 || aPicture.height <= 0) {
NS_WARNING("Empty picture rect");
return nullptr;
}
if (!ValidatePlane(aBuffer.mPlanes[0]) || !ValidatePlane(aBuffer.mPlanes[1]) ||
!ValidatePlane(aBuffer.mPlanes[2])) {
NS_WARNING("Invalid plane size");
return nullptr;
}
// Ensure the picture size specified in the headers can be extracted out of
// the frame we've been supplied without indexing out of bounds.
CheckedUint32 xLimit = aPicture.x + CheckedUint32(aPicture.width);
CheckedUint32 yLimit = aPicture.y + CheckedUint32(aPicture.height);
if (!xLimit.isValid() || xLimit.value() > aBuffer.mPlanes[0].mStride ||
!yLimit.isValid() || yLimit.value() > aBuffer.mPlanes[0].mHeight)
{
// The specified picture dimensions can't be contained inside the video
// frame, we'll stomp memory if we try to copy it. Fail.
NS_WARNING("Overflowing picture rect");
return nullptr;
}
nsAutoPtr<VideoData> v(new VideoData(aOffset,
aTime,
aEndTime,
aKeyframe,
aTimecode,
aInfo.mDisplay));
const YCbCrBuffer::Plane &Y = aBuffer.mPlanes[0];
const YCbCrBuffer::Plane &Cb = aBuffer.mPlanes[1];
const YCbCrBuffer::Plane &Cr = aBuffer.mPlanes[2];
// Currently our decoder only knows how to output to PLANAR_YCBCR
// format.
ImageFormat format[2] = {PLANAR_YCBCR, GRALLOC_PLANAR_YCBCR};
if (IsYV12Format(Y, Cb, Cr)) {
v->mImage = aContainer->CreateImage(format, 2);
} else {
v->mImage = aContainer->CreateImage(format, 1);
}
if (!v->mImage) {
return nullptr;
}
NS_ASSERTION(v->mImage->GetFormat() == PLANAR_YCBCR ||
v->mImage->GetFormat() == GRALLOC_PLANAR_YCBCR,
"Wrong format?");
PlanarYCbCrImage* videoImage = static_cast<PlanarYCbCrImage*>(v->mImage.get());
PlanarYCbCrImage::Data data;
data.mYChannel = Y.mData + Y.mOffset;
data.mYSize = gfxIntSize(Y.mWidth, Y.mHeight);
data.mYStride = Y.mStride;
data.mYSkip = Y.mSkip;
data.mCbChannel = Cb.mData + Cb.mOffset;
data.mCrChannel = Cr.mData + Cr.mOffset;
data.mCbCrSize = gfxIntSize(Cb.mWidth, Cb.mHeight);
data.mCbCrStride = Cb.mStride;
data.mCbSkip = Cb.mSkip;
data.mCrSkip = Cr.mSkip;
data.mPicX = aPicture.x;
data.mPicY = aPicture.y;
data.mPicSize = gfxIntSize(aPicture.width, aPicture.height);
data.mStereoMode = aInfo.mStereoMode;
videoImage->SetDelayedConversion(true);
videoImage->SetData(data);
return v.forget();
}
/* static */
already_AddRefed<VideoData>
VideoData::Create(const VideoInfo& aInfo,
ImageContainer* aContainer,
Image* aImage,
int64_t aOffset,
int64_t aTime,
int64_t aDuration,
const YCbCrBuffer& aBuffer,
bool aKeyframe,
int64_t aTimecode,
const IntRect& aPicture)
{
if (!aImage && !aContainer) {
// Create a dummy VideoData with no image. This gives us something to
// send to media streams if necessary.
RefPtr<VideoData> v(new VideoData(aOffset,
aTime,
aDuration,
aKeyframe,
aTimecode,
aInfo.mDisplay,
0));
return v.forget();
}
// The following situation should never happen unless there is a bug
// in the decoder
if (aBuffer.mPlanes[1].mWidth != aBuffer.mPlanes[2].mWidth ||
aBuffer.mPlanes[1].mHeight != aBuffer.mPlanes[2].mHeight) {
NS_ERROR("C planes with different sizes");
return nullptr;
}
// The following situations could be triggered by invalid input
if (aPicture.width <= 0 || aPicture.height <= 0) {
// In debug mode, makes the error more noticeable
MOZ_ASSERT(false, "Empty picture rect");
return nullptr;
}
if (!ValidatePlane(aBuffer.mPlanes[0]) || !ValidatePlane(aBuffer.mPlanes[1]) ||
!ValidatePlane(aBuffer.mPlanes[2])) {
NS_WARNING("Invalid plane size");
return nullptr;
}
// Ensure the picture size specified in the headers can be extracted out of
// the frame we've been supplied without indexing out of bounds.
CheckedUint32 xLimit = aPicture.x + CheckedUint32(aPicture.width);
CheckedUint32 yLimit = aPicture.y + CheckedUint32(aPicture.height);
if (!xLimit.isValid() || xLimit.value() > aBuffer.mPlanes[0].mStride ||
!yLimit.isValid() || yLimit.value() > aBuffer.mPlanes[0].mHeight)
{
// The specified picture dimensions can't be contained inside the video
// frame, we'll stomp memory if we try to copy it. Fail.
NS_WARNING("Overflowing picture rect");
return nullptr;
}
RefPtr<VideoData> v(new VideoData(aOffset,
aTime,
aDuration,
aKeyframe,
aTimecode,
aInfo.mDisplay,
0));
#ifdef MOZ_WIDGET_GONK
const YCbCrBuffer::Plane &Y = aBuffer.mPlanes[0];
const YCbCrBuffer::Plane &Cb = aBuffer.mPlanes[1];
const YCbCrBuffer::Plane &Cr = aBuffer.mPlanes[2];
#endif
if (!aImage) {
// Currently our decoder only knows how to output to ImageFormat::PLANAR_YCBCR
// format.
#ifdef MOZ_WIDGET_GONK
if (IsYV12Format(Y, Cb, Cr) && !IsInEmulator()) {
v->mImage = aContainer->CreateImage(ImageFormat::GRALLOC_PLANAR_YCBCR);
}
#endif
if (!v->mImage) {
v->mImage = aContainer->CreateImage(ImageFormat::PLANAR_YCBCR);
}
} else {
v->mImage = aImage;
}
if (!v->mImage) {
return nullptr;
}
NS_ASSERTION(v->mImage->GetFormat() == ImageFormat::PLANAR_YCBCR ||
v->mImage->GetFormat() == ImageFormat::GRALLOC_PLANAR_YCBCR,
"Wrong format?");
PlanarYCbCrImage* videoImage = static_cast<PlanarYCbCrImage*>(v->mImage.get());
bool shouldCopyData = (aImage == nullptr);
if (!VideoData::SetVideoDataToImage(videoImage, aInfo, aBuffer, aPicture,
shouldCopyData)) {
return nullptr;
}
#ifdef MOZ_WIDGET_GONK
if (!videoImage->IsValid() && !aImage && IsYV12Format(Y, Cb, Cr)) {
// Failed to allocate gralloc. Try fallback.
v->mImage = aContainer->CreateImage(ImageFormat::PLANAR_YCBCR);
if (!v->mImage) {
return nullptr;
}
videoImage = static_cast<PlanarYCbCrImage*>(v->mImage.get());
if(!VideoData::SetVideoDataToImage(videoImage, aInfo, aBuffer, aPicture,
true /* aCopyData */)) {
return nullptr;
}
}
#endif
return v.forget();
}
static bool
ZeroTextureData(WebGLContext* webgl, const char* funcName, GLuint tex,
TexImageTarget target, uint32_t level,
const webgl::FormatUsageInfo* usage, uint32_t width, uint32_t height,
uint32_t depth)
{
// This has two usecases:
// 1. Lazy zeroing of uninitialized textures:
// a. Before draw, when FakeBlack isn't viable. (TexStorage + Draw*)
// b. Before partial upload. (TexStorage + TexSubImage)
// 2. Zero subrects from out-of-bounds blits. (CopyTex(Sub)Image)
// We have no sympathy for any of these cases.
// "Doctor, it hurts when I do this!" "Well don't do that!"
webgl->GenerateWarning("%s: This operation requires zeroing texture data. This is"
" slow.",
funcName);
gl::GLContext* gl = webgl->GL();
gl->MakeCurrent();
GLenum scopeBindTarget;
switch (target.get()) {
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:
scopeBindTarget = LOCAL_GL_TEXTURE_CUBE_MAP;
break;
default:
scopeBindTarget = target.get();
break;
}
const gl::ScopedBindTexture scopeBindTexture(gl, tex, scopeBindTarget);
auto compression = usage->format->compression;
if (compression) {
auto sizedFormat = usage->format->sizedFormat;
MOZ_RELEASE_ASSERT(sizedFormat, "GFX: texture sized format not set");
const auto fnSizeInBlocks = [](CheckedUint32 pixels, uint8_t pixelsPerBlock) {
return RoundUpToMultipleOf(pixels, pixelsPerBlock) / pixelsPerBlock;
};
const auto widthBlocks = fnSizeInBlocks(width, compression->blockWidth);
const auto heightBlocks = fnSizeInBlocks(height, compression->blockHeight);
CheckedUint32 checkedByteCount = compression->bytesPerBlock;
checkedByteCount *= widthBlocks;
checkedByteCount *= heightBlocks;
checkedByteCount *= depth;
if (!checkedByteCount.isValid())
return false;
const size_t byteCount = checkedByteCount.value();
UniqueBuffer zeros = calloc(1, byteCount);
if (!zeros)
return false;
ScopedUnpackReset scopedReset(webgl);
gl->fPixelStorei(LOCAL_GL_UNPACK_ALIGNMENT, 1); // Don't bother with striding it
// well.
const auto error = DoCompressedTexSubImage(gl, target.get(), level, 0, 0, 0,
width, height, depth, sizedFormat,
byteCount, zeros.get());
return !error;
}
const auto driverUnpackInfo = usage->idealUnpack;
MOZ_RELEASE_ASSERT(driverUnpackInfo, "GFX: ideal unpack info not set.");
if (webgl->IsExtensionEnabled(WebGLExtensionID::WEBGL_depth_texture) &&
gl->IsANGLE() &&
usage->format->d)
{
// ANGLE_depth_texture does not allow uploads, so we have to clear.
// (Restriction because of D3D9)
MOZ_ASSERT(target == LOCAL_GL_TEXTURE_2D);
MOZ_ASSERT(level == 0);
ZeroANGLEDepthTexture(webgl, tex, usage, width, height);
return true;
}
const webgl::PackingInfo packing = driverUnpackInfo->ToPacking();
const auto bytesPerPixel = webgl::BytesPerPixel(packing);
CheckedUint32 checkedByteCount = bytesPerPixel;
checkedByteCount *= width;
checkedByteCount *= height;
checkedByteCount *= depth;
if (!checkedByteCount.isValid())
return false;
const size_t byteCount = checkedByteCount.value();
UniqueBuffer zeros = calloc(1, byteCount);
if (!zeros)
return false;
ScopedUnpackReset scopedReset(webgl);
gl->fPixelStorei(LOCAL_GL_UNPACK_ALIGNMENT, 1); // Don't bother with striding it well.
const auto error = DoTexSubImage(gl, target, level, 0, 0, 0, width, height, depth,
packing, zeros.get());
return !error;
}
bool
nsTextFragment::Append(const char16_t* aBuffer, uint32_t aLength,
bool aUpdateBidi, bool aForce2b)
{
// This is a common case because some callsites create a textnode
// with a value by creating the node and then calling AppendData.
if (mState.mLength == 0) {
return SetTo(aBuffer, aLength, aUpdateBidi, aForce2b);
}
// Should we optimize for aData.Length() == 0?
CheckedUint32 length = mState.mLength;
length += aLength;
if (!length.isValid()) {
return false;
}
if (mState.mIs2b) {
length *= sizeof(char16_t);
if (!length.isValid()) {
return false;
}
// Already a 2-byte string so the result will be too
char16_t* buff = static_cast<char16_t*>(realloc(m2b, length.value()));
if (!buff) {
return false;
}
memcpy(buff + mState.mLength, aBuffer, aLength * sizeof(char16_t));
mState.mLength += aLength;
m2b = buff;
if (aUpdateBidi) {
UpdateBidiFlag(aBuffer, aLength);
}
return true;
}
// Current string is a 1-byte string, check if the new data fits in one byte too.
int32_t first16bit = aForce2b ? 0 : FirstNon8Bit(aBuffer, aBuffer + aLength);
if (first16bit != -1) { // aBuffer contains no non-8bit character
length *= sizeof(char16_t);
if (!length.isValid()) {
return false;
}
// The old data was 1-byte, but the new is not so we have to expand it
// all to 2-byte
char16_t* buff = static_cast<char16_t*>(malloc(length.value()));
if (!buff) {
return false;
}
// Copy data into buff
LossyConvertEncoding8to16 converter(buff);
copy_string(m1b, m1b+mState.mLength, converter);
memcpy(buff + mState.mLength, aBuffer, aLength * sizeof(char16_t));
mState.mLength += aLength;
mState.mIs2b = true;
if (mState.mInHeap) {
free(m2b);
}
m2b = buff;
mState.mInHeap = true;
if (aUpdateBidi) {
UpdateBidiFlag(aBuffer + first16bit, aLength - first16bit);
}
return true;
}
// The new and the old data is all 1-byte
char* buff;
if (mState.mInHeap) {
buff = static_cast<char*>(realloc(const_cast<char*>(m1b), length.value()));
if (!buff) {
return false;
}
}
else {
buff = static_cast<char*>(malloc(length.value()));
if (!buff) {
return false;
}
memcpy(buff, m1b, mState.mLength);
mState.mInHeap = true;
}
// Copy aBuffer into buff.
LossyConvertEncoding16to8 converter(buff + mState.mLength);
copy_string(aBuffer, aBuffer + aLength, converter);
m1b = buff;
mState.mLength += aLength;
return true;
}
/*static*/ bool
TexUnpackSurface::ConvertSurface(WebGLContext* webgl, const webgl::DriverUnpackInfo* dui,
gfx::DataSourceSurface* surf, bool isSurfAlphaPremult,
UniqueBuffer* const out_convertedBuffer,
uint8_t* const out_convertedAlignment,
bool* const out_outOfMemory)
{
*out_outOfMemory = false;
const size_t width = surf->GetSize().width;
const size_t height = surf->GetSize().height;
// Source args:
// After we call this, on OSX, our GLContext will no longer be current.
gfx::DataSourceSurface::ScopedMap srcMap(surf, gfx::DataSourceSurface::MapType::READ);
if (!srcMap.IsMapped())
return false;
const void* const srcBegin = srcMap.GetData();
const size_t srcStride = srcMap.GetStride();
WebGLTexelFormat srcFormat;
if (!GetFormatForSurf(surf, &srcFormat))
return false;
const bool srcPremultiplied = isSurfAlphaPremult;
// Dest args:
WebGLTexelFormat dstFormat;
if (!GetFormatForPackingTuple(dui->unpackFormat, dui->unpackType, &dstFormat))
return false;
const auto bytesPerPixel = webgl::BytesPerPixel({dui->unpackFormat, dui->unpackType});
const size_t dstRowBytes = bytesPerPixel * width;
const size_t dstAlignment = 8; // Just use the max!
const size_t dstStride = RoundUpToMultipleOf(dstRowBytes, dstAlignment);
CheckedUint32 checkedDstSize = dstStride;
checkedDstSize *= height;
if (!checkedDstSize.isValid()) {
*out_outOfMemory = true;
return false;
}
const size_t dstSize = checkedDstSize.value();
UniqueBuffer dstBuffer = malloc(dstSize);
if (!dstBuffer) {
*out_outOfMemory = true;
return false;
}
void* const dstBegin = dstBuffer.get();
gl::OriginPos srcOrigin, dstOrigin;
OriginsForDOM(webgl, &srcOrigin, &dstOrigin);
const bool dstPremultiplied = webgl->mPixelStore_PremultiplyAlpha;
// And go!:
if (!ConvertImage(width, height,
srcBegin, srcStride, srcOrigin, srcFormat, srcPremultiplied,
dstBegin, dstStride, dstOrigin, dstFormat, dstPremultiplied))
{
MOZ_ASSERT(false, "ConvertImage failed unexpectedly.");
NS_ERROR("ConvertImage failed unexpectedly.");
*out_outOfMemory = true;
return false;
}
*out_convertedBuffer = Move(dstBuffer);
*out_convertedAlignment = dstAlignment;
return true;
}
static bool ZeroTextureData(const WebGLContext* webgl, GLuint tex,
TexImageTarget target, uint32_t level,
const webgl::FormatUsageInfo* usage, uint32_t width,
uint32_t height, uint32_t depth) {
// This has two usecases:
// 1. Lazy zeroing of uninitialized textures:
// a. Before draw.
// b. Before partial upload. (TexStorage + TexSubImage)
// 2. Zero subrects from out-of-bounds blits. (CopyTex(Sub)Image)
// We have no sympathy for any of these cases.
// "Doctor, it hurts when I do this!" "Well don't do that!"
const auto targetStr = EnumString(target.get());
webgl->GeneratePerfWarning(
"Tex image %s level %u is incurring lazy initialization.",
targetStr.c_str(), level);
gl::GLContext* gl = webgl->GL();
GLenum scopeBindTarget;
switch (target.get()) {
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:
scopeBindTarget = LOCAL_GL_TEXTURE_CUBE_MAP;
break;
default:
scopeBindTarget = target.get();
break;
}
const gl::ScopedBindTexture scopeBindTexture(gl, tex, scopeBindTarget);
const auto& compression = usage->format->compression;
if (compression) {
auto sizedFormat = usage->format->sizedFormat;
MOZ_RELEASE_ASSERT(sizedFormat, "GFX: texture sized format not set");
const auto fnSizeInBlocks = [](CheckedUint32 pixels,
uint8_t pixelsPerBlock) {
return RoundUpToMultipleOf(pixels, pixelsPerBlock) / pixelsPerBlock;
};
const auto widthBlocks = fnSizeInBlocks(width, compression->blockWidth);
const auto heightBlocks = fnSizeInBlocks(height, compression->blockHeight);
CheckedUint32 checkedByteCount = compression->bytesPerBlock;
checkedByteCount *= widthBlocks;
checkedByteCount *= heightBlocks;
checkedByteCount *= depth;
if (!checkedByteCount.isValid()) return false;
const size_t byteCount = checkedByteCount.value();
UniqueBuffer zeros = calloc(1, byteCount);
if (!zeros) return false;
ScopedUnpackReset scopedReset(webgl);
gl->fPixelStorei(LOCAL_GL_UNPACK_ALIGNMENT, 1); // Don't bother with
// striding it well.
const auto error =
DoCompressedTexSubImage(gl, target.get(), level, 0, 0, 0, width, height,
depth, sizedFormat, byteCount, zeros.get());
return !error;
}
const auto driverUnpackInfo = usage->idealUnpack;
MOZ_RELEASE_ASSERT(driverUnpackInfo, "GFX: ideal unpack info not set.");
if (usage->format->d) {
// ANGLE_depth_texture does not allow uploads, so we have to clear.
// (Restriction because of D3D9)
// Also, depth resources are cleared to 1.0f and are always renderable, so
// just use FB clears.
return ClearDepthTexture(*webgl, tex, target, level, usage, depth);
}
const webgl::PackingInfo packing = driverUnpackInfo->ToPacking();
const auto bytesPerPixel = webgl::BytesPerPixel(packing);
CheckedUint32 checkedByteCount = bytesPerPixel;
checkedByteCount *= width;
checkedByteCount *= height;
checkedByteCount *= depth;
if (!checkedByteCount.isValid()) return false;
const size_t byteCount = checkedByteCount.value();
UniqueBuffer zeros = calloc(1, byteCount);
if (!zeros) return false;
ScopedUnpackReset scopedReset(webgl);
gl->fPixelStorei(LOCAL_GL_UNPACK_ALIGNMENT,
1); // Don't bother with striding it well.
const auto error = DoTexSubImage(gl, target, level, 0, 0, 0, width, height,
depth, packing, zeros.get());
return !error;
}
