static bool
ValidateUnpackPixels(WebGLContext* webgl, const char* funcName, uint32_t fullRows,
uint32_t tailPixels, webgl::TexUnpackBlob* blob)
{
if (!blob->mWidth || !blob->mHeight || !blob->mDepth)
return true;
const auto usedPixelsPerRow = CheckedUint32(blob->mSkipPixels) + blob->mWidth;
if (!usedPixelsPerRow.isValid() || usedPixelsPerRow.value() > blob->mRowLength) {
webgl->ErrorInvalidOperation("%s: UNPACK_SKIP_PIXELS + width >"
" UNPACK_ROW_LENGTH.",
funcName);
return false;
}
if (blob->mHeight > blob->mImageHeight) {
webgl->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()) {
webgl->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;
}
webgl->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;
}
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;
}
void
AudioStream::GetTimeStretched(AudioBufferWriter& aWriter)
{
mMonitor.AssertCurrentThreadOwns();
// We need to call the non-locking version, because we already have the lock.
if (EnsureTimeStretcherInitializedUnlocked() != NS_OK) {
return;
}
uint32_t toPopFrames =
ceil(aWriter.Available() * mAudioClock.GetPlaybackRate());
while (mTimeStretcher->numSamples() < aWriter.Available()) {
UniquePtr<Chunk> c = mDataSource.PopFrames(toPopFrames);
if (c->Frames() == 0) {
break;
}
MOZ_ASSERT(c->Frames() <= toPopFrames);
if (IsValidAudioFormat(c.get())) {
mTimeStretcher->putSamples(c->Data(), c->Frames());
} else {
// Write silence if invalid format.
AutoTArray<AudioDataValue, 1000> buf;
auto size = CheckedUint32(mOutChannels) * c->Frames();
if (!size.isValid()) {
// The overflow should not happen in normal case.
LOGW("Invalid member data: %d channels, %d frames", mOutChannels, c->Frames());
return;
}
buf.SetLength(size.value());
size = size * sizeof(AudioDataValue);
if (!size.isValid()) {
LOGW("The required memory size is too large.");
return;
}
memset(buf.Elements(), 0, size.value());
mTimeStretcher->putSamples(buf.Elements(), c->Frames());
}
}
auto timeStretcher = mTimeStretcher;
aWriter.Write([timeStretcher] (AudioDataValue* aPtr, uint32_t aFrames) {
return timeStretcher->receiveSamples(aPtr, aFrames);
}, aWriter.Available());
}
static bool
ValidateUnpackBytes(WebGLContext* webgl, const char* funcName,
const webgl::PackingInfo& pi, size_t availByteCount,
webgl::TexUnpackBlob* blob)
{
if (!blob->mWidth || !blob->mHeight || !blob->mDepth)
return true;
const auto bytesPerPixel = webgl::BytesPerPixel(pi);
const auto bytesPerRow = CheckedUint32(blob->mRowLength) * bytesPerPixel;
const auto rowStride = RoundUpToMultipleOf(bytesPerRow, blob->mAlignment);
const auto fullRows = availByteCount / rowStride;
if (!fullRows.isValid()) {
webgl->ErrorOutOfMemory("%s: Unacceptable upload size calculated.", funcName);
return false;
}
const auto bodyBytes = fullRows.value() * rowStride.value();
const auto tailPixels = (availByteCount - bodyBytes) / bytesPerPixel;
return ValidateUnpackPixels(webgl, funcName, fullRows.value(), tailPixels, blob);
}
bool
TexUnpackBytes::TexOrSubImage(bool isSubImage, bool needsRespec, const char* funcName,
WebGLTexture* tex, TexImageTarget target, GLint level,
const webgl::DriverUnpackInfo* dui, GLint xOffset,
GLint yOffset, GLint zOffset, const webgl::PackingInfo& pi,
GLenum* const out_error) const
{
WebGLContext* webgl = tex->mContext;
const auto format = FormatForPackingInfo(pi);
const auto bytesPerPixel = webgl::BytesPerPixel(pi);
const uint8_t* uploadPtr = mPtr;
UniqueBuffer tempBuffer;
do {
if (!mIsClientData || !mPtr)
break;
if (!webgl->mPixelStore_FlipY &&
!webgl->mPixelStore_PremultiplyAlpha)
{
break;
}
if (webgl->mPixelStore_UnpackImageHeight ||
webgl->mPixelStore_UnpackSkipImages ||
webgl->mPixelStore_UnpackRowLength ||
webgl->mPixelStore_UnpackSkipRows ||
webgl->mPixelStore_UnpackSkipPixels)
{
webgl->ErrorInvalidOperation("%s: Non-DOM-Element uploads with alpha-premult"
" or y-flip do not support subrect selection.",
funcName);
return false;
}
webgl->GenerateWarning("%s: Alpha-premult and y-flip are deprecated for"
" non-DOM-Element uploads.",
funcName);
const uint32_t rowLength = mWidth;
const uint32_t rowCount = mHeight * mDepth;
const auto stride = RoundUpToMultipleOf(rowLength * bytesPerPixel, mAlignment);
if (!ConvertIfNeeded(webgl, funcName, rowLength, rowCount, format, mPtr, stride,
format, stride, &uploadPtr, &tempBuffer))
{
return false;
}
} while (false);
//////
const auto& gl = webgl->gl;
bool useParanoidHandling = false;
if (mNeedsExactUpload && webgl->mBoundPixelUnpackBuffer) {
webgl->GenerateWarning("%s: Uploads from a buffer with a final row with a byte"
" count smaller than the row stride can incur extra"
" overhead.",
funcName);
if (gl->WorkAroundDriverBugs()) {
useParanoidHandling |= (gl->Vendor() == gl::GLVendor::NVIDIA);
}
}
if (!useParanoidHandling) {
if (webgl->mBoundPixelUnpackBuffer) {
gl->fBindBuffer(LOCAL_GL_PIXEL_UNPACK_BUFFER,
webgl->mBoundPixelUnpackBuffer->mGLName);
}
*out_error = DoTexOrSubImage(isSubImage, gl, target, level, dui, xOffset, yOffset,
zOffset, mWidth, mHeight, mDepth, uploadPtr);
if (webgl->mBoundPixelUnpackBuffer) {
gl->fBindBuffer(LOCAL_GL_PIXEL_UNPACK_BUFFER, 0);
}
return true;
}
//////
MOZ_ASSERT(webgl->mBoundPixelUnpackBuffer);
if (!isSubImage) {
// Alloc first to catch OOMs.
AssertUintParamCorrect(gl, LOCAL_GL_PIXEL_UNPACK_BUFFER, 0);
*out_error = DoTexOrSubImage(false, gl, target, level, dui, xOffset, yOffset,
zOffset, mWidth, mHeight, mDepth, nullptr);
if (*out_error)
return true;
}
const ScopedLazyBind bindPBO(gl, LOCAL_GL_PIXEL_UNPACK_BUFFER,
webgl->mBoundPixelUnpackBuffer);
//////
// Make our sometimes-implicit values explicit. Also this keeps them constant when we
// ask for height=mHeight-1 and such.
gl->fPixelStorei(LOCAL_GL_UNPACK_ROW_LENGTH, mRowLength);
gl->fPixelStorei(LOCAL_GL_UNPACK_IMAGE_HEIGHT, mImageHeight);
if (mDepth > 1) {
*out_error = DoTexOrSubImage(true, gl, target, level, dui, xOffset, yOffset,
zOffset, mWidth, mHeight, mDepth-1, uploadPtr);
}
// Skip the images we uploaded.
gl->fPixelStorei(LOCAL_GL_UNPACK_SKIP_IMAGES, mSkipImages + mDepth - 1);
if (mHeight > 1) {
*out_error = DoTexOrSubImage(true, gl, target, level, dui, xOffset, yOffset,
zOffset+mDepth-1, mWidth, mHeight-1, 1, uploadPtr);
}
const auto totalSkipRows = CheckedUint32(mSkipImages) * mImageHeight + mSkipRows;
const auto totalFullRows = CheckedUint32(mDepth - 1) * mImageHeight + mHeight - 1;
const auto tailOffsetRows = totalSkipRows + totalFullRows;
const auto bytesPerRow = CheckedUint32(mRowLength) * bytesPerPixel;
const auto rowStride = RoundUpToMultipleOf(bytesPerRow, mAlignment);
if (!rowStride.isValid()) {
MOZ_CRASH("Should be checked earlier.");
}
const auto tailOffsetBytes = tailOffsetRows * rowStride;
uploadPtr += tailOffsetBytes.value();
//////
gl->fPixelStorei(LOCAL_GL_UNPACK_ALIGNMENT, 1); // No stride padding.
gl->fPixelStorei(LOCAL_GL_UNPACK_ROW_LENGTH, 0); // No padding in general.
gl->fPixelStorei(LOCAL_GL_UNPACK_SKIP_IMAGES, 0); // Don't skip images,
gl->fPixelStorei(LOCAL_GL_UNPACK_SKIP_ROWS, 0); // or rows.
// Keep skipping pixels though!
*out_error = DoTexOrSubImage(true, gl, target, level, dui, xOffset,
yOffset+mHeight-1, zOffset+mDepth-1, mWidth, 1, 1,
uploadPtr);
// Reset all our modified state.
gl->fPixelStorei(LOCAL_GL_UNPACK_ALIGNMENT, webgl->mPixelStore_UnpackAlignment);
gl->fPixelStorei(LOCAL_GL_UNPACK_IMAGE_HEIGHT, webgl->mPixelStore_UnpackImageHeight);
gl->fPixelStorei(LOCAL_GL_UNPACK_ROW_LENGTH, webgl->mPixelStore_UnpackRowLength);
gl->fPixelStorei(LOCAL_GL_UNPACK_SKIP_IMAGES, webgl->mPixelStore_UnpackSkipImages);
gl->fPixelStorei(LOCAL_GL_UNPACK_SKIP_ROWS, webgl->mPixelStore_UnpackSkipRows);
return true;
}
bool
TexUnpackBlob::ConvertIfNeeded(WebGLContext* webgl, const char* funcName,
const uint32_t rowLength, const uint32_t rowCount,
WebGLTexelFormat srcFormat,
const uint8_t* const srcBegin, const ptrdiff_t srcStride,
WebGLTexelFormat dstFormat, const ptrdiff_t dstStride,
const uint8_t** const out_begin,
UniqueBuffer* const out_anchoredBuffer) const
{
MOZ_ASSERT(srcFormat != WebGLTexelFormat::FormatNotSupportingAnyConversion);
MOZ_ASSERT(dstFormat != WebGLTexelFormat::FormatNotSupportingAnyConversion);
*out_begin = srcBegin;
if (!rowLength || !rowCount)
return true;
const auto srcIsPremult = (mSrcAlphaType == gfxAlphaType::Premult);
const auto& dstIsPremult = webgl->mPixelStore_PremultiplyAlpha;
const auto fnHasPremultMismatch = [&]() {
if (mSrcAlphaType == gfxAlphaType::Opaque)
return false;
if (!HasColorAndAlpha(srcFormat))
return false;
return srcIsPremult != dstIsPremult;
};
const auto srcOrigin = (webgl->mPixelStore_FlipY ? gl::OriginPos::TopLeft
: gl::OriginPos::BottomLeft);
const auto dstOrigin = gl::OriginPos::BottomLeft;
if (srcFormat != dstFormat) {
webgl->GeneratePerfWarning("%s: Conversion requires pixel reformatting. (%u->%u)",
funcName, uint32_t(srcFormat),
uint32_t(dstFormat));
} else if (fnHasPremultMismatch()) {
webgl->GeneratePerfWarning("%s: Conversion requires change in"
" alpha-premultiplication.",
funcName);
} else if (srcOrigin != dstOrigin) {
webgl->GeneratePerfWarning("%s: Conversion requires y-flip.", funcName);
} else if (srcStride != dstStride) {
webgl->GeneratePerfWarning("%s: Conversion requires change in stride. (%u->%u)",
funcName, uint32_t(srcStride), uint32_t(dstStride));
} else {
return true;
}
////
const auto dstTotalBytes = CheckedUint32(rowCount) * dstStride;
if (!dstTotalBytes.isValid()) {
webgl->ErrorOutOfMemory("%s: Calculation failed.", funcName);
return false;
}
UniqueBuffer dstBuffer = calloc(1, dstTotalBytes.value());
if (!dstBuffer.get()) {
webgl->ErrorOutOfMemory("%s: Failed to allocate dest buffer.", funcName);
return false;
}
const auto dstBegin = static_cast<uint8_t*>(dstBuffer.get());
////
// And go!:
bool wasTrivial;
if (!ConvertImage(rowLength, rowCount,
srcBegin, srcStride, srcOrigin, srcFormat, srcIsPremult,
dstBegin, dstStride, dstOrigin, dstFormat, dstIsPremult,
&wasTrivial))
{
webgl->ErrorImplementationBug("%s: ConvertImage failed.", funcName);
return false;
}
*out_begin = dstBegin;
*out_anchoredBuffer = Move(dstBuffer);
return true;
}
bool
TexUnpackBlob::ConvertIfNeeded(WebGLContext* webgl, const char* funcName,
const uint8_t* srcBytes, uint32_t srcStride,
uint8_t srcBPP, WebGLTexelFormat srcFormat,
const webgl::DriverUnpackInfo* dstDUI,
const uint8_t** const out_bytes,
UniqueBuffer* const out_anchoredBuffer) const
{
*out_bytes = srcBytes;
if (!HasData() || !mWidth || !mHeight || !mDepth)
return true;
//////
const auto totalSkipRows = mSkipRows + CheckedUint32(mSkipImages) * mImageHeight;
const auto offset = mSkipPixels * CheckedUint32(srcBPP) + totalSkipRows * srcStride;
if (!offset.isValid()) {
webgl->ErrorOutOfMemory("%s: Invalid offset calculation during conversion.",
funcName);
return false;
}
const uint32_t skipBytes = offset.value();
auto const srcBegin = srcBytes + skipBytes;
//////
const auto srcOrigin = (webgl->mPixelStore_FlipY ? gl::OriginPos::TopLeft
: gl::OriginPos::BottomLeft);
const auto dstOrigin = gl::OriginPos::BottomLeft;
const bool isDstPremult = webgl->mPixelStore_PremultiplyAlpha;
const auto pi = dstDUI->ToPacking();
const auto dstBPP = webgl::BytesPerPixel(pi);
const auto dstWidthBytes = CheckedUint32(dstBPP) * mWidth;
const auto dstRowLengthBytes = CheckedUint32(dstBPP) * mRowLength;
const auto dstAlignment = mAlignment;
const auto dstStride = RoundUpToMultipleOf(dstRowLengthBytes, dstAlignment);
//////
const auto dstTotalRows = CheckedUint32(mDepth - 1) * mImageHeight + mHeight;
const auto dstUsedSizeExceptLastRow = (dstTotalRows - 1) * dstStride;
const auto dstSize = skipBytes + dstUsedSizeExceptLastRow + dstWidthBytes;
if (!dstSize.isValid()) {
webgl->ErrorOutOfMemory("%s: Invalid dstSize calculation during conversion.",
funcName);
return false;
}
//////
const auto dstFormat = FormatForPackingInfo(pi);
bool premultMatches = (mIsSrcPremult == isDstPremult);
if (!UnpackFormatHasColorAndAlpha(dstDUI->unpackFormat)) {
premultMatches = true;
}
const bool needsPixelConversion = (srcFormat != dstFormat || !premultMatches);
const bool originsMatch = (srcOrigin == dstOrigin);
MOZ_ASSERT_IF(!needsPixelConversion, srcBPP == dstBPP);
if (!needsPixelConversion &&
originsMatch &&
srcStride == dstStride.value())
{
// No conversion needed!
return true;
}
//////
// We need some sort of conversion, so create the dest buffer.
*out_anchoredBuffer = calloc(1, dstSize.value());
const auto dstBytes = (uint8_t*)out_anchoredBuffer->get();
if (!dstBytes) {
webgl->ErrorOutOfMemory("%s: Unable to allocate buffer during conversion.",
funcName);
return false;
}
*out_bytes = dstBytes;
const auto dstBegin = dstBytes + skipBytes;
//////
// Row conversion
if (!needsPixelConversion) {
webgl->GenerateWarning("%s: Incurred CPU row conversion, which is slow.",
funcName);
const uint8_t* srcRow = srcBegin;
uint8_t* dstRow = dstBegin;
const auto widthBytes = dstWidthBytes.value();
ptrdiff_t dstCopyStride = dstStride.value();
if (!originsMatch) {
dstRow += dstUsedSizeExceptLastRow.value();
dstCopyStride = -dstCopyStride;
}
for (uint32_t i = 0; i < dstTotalRows.value(); i++) {
memcpy(dstRow, srcRow, widthBytes);
srcRow += srcStride;
dstRow += dstCopyStride;
}
return true;
}
////////////
// Pixel conversion.
MOZ_ASSERT(srcFormat != WebGLTexelFormat::FormatNotSupportingAnyConversion);
MOZ_ASSERT(dstFormat != WebGLTexelFormat::FormatNotSupportingAnyConversion);
webgl->GenerateWarning("%s: Incurred CPU pixel conversion, which is very slow.",
funcName);
//////
// And go!:
bool wasTrivial;
if (!ConvertImage(mWidth, dstTotalRows.value(),
srcBegin, srcStride, srcOrigin, srcFormat, mIsSrcPremult,
dstBegin, dstStride.value(), dstOrigin, dstFormat, isDstPremult,
&wasTrivial))
{
webgl->ErrorImplementationBug("%s: ConvertImage failed.", funcName);
return false;
}
if (!wasTrivial) {
webgl->GenerateWarning("%s: Chosen format/type incurred an expensive reformat:"
" 0x%04x/0x%04x",
funcName, dstDUI->unpackFormat, dstDUI->unpackType);
}
return true;
}
bool
WebGLContext::DoFakeVertexAttrib0(GLuint vertexCount)
{
WebGLVertexAttrib0Status whatDoesAttrib0Need = WhatDoesVertexAttrib0Need();
if (MOZ_LIKELY(whatDoesAttrib0Need == WebGLVertexAttrib0Status::Default))
return true;
if (!mAlreadyWarnedAboutFakeVertexAttrib0) {
GenerateWarning("Drawing without vertex attrib 0 array enabled forces the browser "
"to do expensive emulation work when running on desktop OpenGL "
"platforms, for example on Mac. It is preferable to always draw "
"with vertex attrib 0 array enabled, by using bindAttribLocation "
"to bind some always-used attribute to location 0.");
mAlreadyWarnedAboutFakeVertexAttrib0 = true;
}
CheckedUint32 checked_dataSize = CheckedUint32(vertexCount) * 4 * sizeof(GLfloat);
if (!checked_dataSize.isValid()) {
ErrorOutOfMemory("Integer overflow trying to construct a fake vertex attrib 0 array for a draw-operation "
"with %d vertices. Try reducing the number of vertices.", vertexCount);
return false;
}
GLuint dataSize = checked_dataSize.value();
if (!mFakeVertexAttrib0BufferObject) {
gl->fGenBuffers(1, &mFakeVertexAttrib0BufferObject);
}
// if the VBO status is already exactly what we need, or if the only difference is that it's initialized and
// we don't need it to be, then consider it OK
bool vertexAttrib0BufferStatusOK =
mFakeVertexAttrib0BufferStatus == whatDoesAttrib0Need ||
(mFakeVertexAttrib0BufferStatus == WebGLVertexAttrib0Status::EmulatedInitializedArray &&
whatDoesAttrib0Need == WebGLVertexAttrib0Status::EmulatedUninitializedArray);
if (!vertexAttrib0BufferStatusOK ||
mFakeVertexAttrib0BufferObjectSize < dataSize ||
mFakeVertexAttrib0BufferObjectVector[0] != mVertexAttrib0Vector[0] ||
mFakeVertexAttrib0BufferObjectVector[1] != mVertexAttrib0Vector[1] ||
mFakeVertexAttrib0BufferObjectVector[2] != mVertexAttrib0Vector[2] ||
mFakeVertexAttrib0BufferObjectVector[3] != mVertexAttrib0Vector[3])
{
mFakeVertexAttrib0BufferStatus = whatDoesAttrib0Need;
mFakeVertexAttrib0BufferObjectSize = dataSize;
mFakeVertexAttrib0BufferObjectVector[0] = mVertexAttrib0Vector[0];
mFakeVertexAttrib0BufferObjectVector[1] = mVertexAttrib0Vector[1];
mFakeVertexAttrib0BufferObjectVector[2] = mVertexAttrib0Vector[2];
mFakeVertexAttrib0BufferObjectVector[3] = mVertexAttrib0Vector[3];
gl->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, mFakeVertexAttrib0BufferObject);
GetAndFlushUnderlyingGLErrors();
if (mFakeVertexAttrib0BufferStatus == WebGLVertexAttrib0Status::EmulatedInitializedArray) {
auto array = MakeUniqueFallible<GLfloat[]>(4 * vertexCount);
if (!array) {
ErrorOutOfMemory("Fake attrib0 array.");
return false;
}
for(size_t i = 0; i < vertexCount; ++i) {
array[4 * i + 0] = mVertexAttrib0Vector[0];
array[4 * i + 1] = mVertexAttrib0Vector[1];
array[4 * i + 2] = mVertexAttrib0Vector[2];
array[4 * i + 3] = mVertexAttrib0Vector[3];
}
gl->fBufferData(LOCAL_GL_ARRAY_BUFFER, dataSize, array.get(), LOCAL_GL_DYNAMIC_DRAW);
} else {
gl->fBufferData(LOCAL_GL_ARRAY_BUFFER, dataSize, nullptr, LOCAL_GL_DYNAMIC_DRAW);
}
GLenum error = GetAndFlushUnderlyingGLErrors();
gl->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, mBoundArrayBuffer ? mBoundArrayBuffer->mGLName : 0);
// note that we do this error checking and early return AFTER having restored the buffer binding above
if (error) {
ErrorOutOfMemory("Ran out of memory trying to construct a fake vertex attrib 0 array for a draw-operation "
"with %d vertices. Try reducing the number of vertices.", vertexCount);
return false;
}
}
gl->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, mFakeVertexAttrib0BufferObject);
gl->fVertexAttribPointer(0, 4, LOCAL_GL_FLOAT, LOCAL_GL_FALSE, 0, 0);
return true;
}
bool
WebGLContext::ValidateBufferFetching(const char* info)
{
MOZ_ASSERT(mCurrentProgram);
// Note that mCurrentProgram->IsLinked() is NOT GUARANTEED.
MOZ_ASSERT(mActiveProgramLinkInfo);
#ifdef DEBUG
GLint currentProgram = 0;
MakeContextCurrent();
gl->fGetIntegerv(LOCAL_GL_CURRENT_PROGRAM, ¤tProgram);
MOZ_ASSERT(GLuint(currentProgram) == mCurrentProgram->mGLName,
"WebGL: current program doesn't agree with GL state");
#endif
if (mBufferFetchingIsVerified)
return true;
bool hasPerVertex = false;
uint32_t maxVertices = UINT32_MAX;
uint32_t maxInstances = UINT32_MAX;
uint32_t attribs = mBoundVertexArray->mAttribs.Length();
for (uint32_t i = 0; i < attribs; ++i) {
const WebGLVertexAttribData& vd = mBoundVertexArray->mAttribs[i];
// If the attrib array isn't enabled, there's nothing to check;
// it's a static value.
if (!vd.enabled)
continue;
if (vd.buf == nullptr) {
ErrorInvalidOperation("%s: no VBO bound to enabled vertex attrib index %d!", info, i);
return false;
}
// If the attrib is not in use, then we don't have to validate
// it, just need to make sure that the binding is non-null.
if (!mActiveProgramLinkInfo->HasActiveAttrib(i))
continue;
// the base offset
CheckedUint32 checked_byteLength = CheckedUint32(vd.buf->ByteLength()) - vd.byteOffset;
CheckedUint32 checked_sizeOfLastElement = CheckedUint32(vd.componentSize()) * vd.size;
if (!checked_byteLength.isValid() ||
!checked_sizeOfLastElement.isValid())
{
ErrorInvalidOperation("%s: integer overflow occured while checking vertex attrib %d", info, i);
return false;
}
if (checked_byteLength.value() < checked_sizeOfLastElement.value()) {
maxVertices = 0;
maxInstances = 0;
break;
}
CheckedUint32 checked_maxAllowedCount = ((checked_byteLength - checked_sizeOfLastElement) / vd.actualStride()) + 1;
if (!checked_maxAllowedCount.isValid()) {
ErrorInvalidOperation("%s: integer overflow occured while checking vertex attrib %d", info, i);
return false;
}
if (vd.divisor == 0) {
maxVertices = std::min(maxVertices, checked_maxAllowedCount.value());
hasPerVertex = true;
} else {
CheckedUint32 checked_curMaxInstances = checked_maxAllowedCount * vd.divisor;
uint32_t curMaxInstances = UINT32_MAX;
// If this isn't valid, it's because we overflowed our
// uint32 above. Just leave this as UINT32_MAX, since
// sizeof(uint32) becomes our limiting factor.
if (checked_curMaxInstances.isValid()) {
curMaxInstances = checked_curMaxInstances.value();
}
maxInstances = std::min(maxInstances, curMaxInstances);
}
}
mBufferFetchingIsVerified = true;
mBufferFetchingHasPerVertex = hasPerVertex;
mMaxFetchedVertices = maxVertices;
mMaxFetchedInstances = maxInstances;
return true;
}
bool
WebGLContext::DrawElements_check(GLsizei count, GLenum type,
WebGLintptr byteOffset, GLsizei primcount,
const char* info, GLuint* out_upperBound)
{
if (count < 0 || byteOffset < 0) {
ErrorInvalidValue("%s: negative count or offset", info);
return false;
}
if (primcount < 0) {
ErrorInvalidValue("%s: negative primcount", info);
return false;
}
if (!ValidateStencilParamsForDrawCall()) {
return false;
}
// If count is 0, there's nothing to do.
if (count == 0 || primcount == 0)
return false;
uint8_t bytesPerElem = 0;
switch (type) {
case LOCAL_GL_UNSIGNED_BYTE:
bytesPerElem = 1;
break;
case LOCAL_GL_UNSIGNED_SHORT:
bytesPerElem = 2;
break;
case LOCAL_GL_UNSIGNED_INT:
if (IsWebGL2() || IsExtensionEnabled(WebGLExtensionID::OES_element_index_uint)) {
bytesPerElem = 4;
}
break;
}
if (!bytesPerElem) {
ErrorInvalidEnum("%s: Invalid `type`: 0x%04x", info, type);
return false;
}
if (byteOffset % bytesPerElem != 0) {
ErrorInvalidOperation("%s: `byteOffset` must be a multiple of the size of `type`",
info);
return false;
}
const GLsizei first = byteOffset / bytesPerElem;
const CheckedUint32 checked_byteCount = bytesPerElem * CheckedUint32(count);
if (!checked_byteCount.isValid()) {
ErrorInvalidValue("%s: overflow in byteCount", info);
return false;
}
// Any checks below this depend on a program being available.
if (!mCurrentProgram) {
ErrorInvalidOperation("%s: null CURRENT_PROGRAM", info);
return false;
}
if (!mBoundVertexArray->mElementArrayBuffer) {
ErrorInvalidOperation("%s: must have element array buffer binding", info);
return false;
}
WebGLBuffer& elemArrayBuffer = *mBoundVertexArray->mElementArrayBuffer;
if (!elemArrayBuffer.ByteLength()) {
ErrorInvalidOperation("%s: bound element array buffer doesn't have any data", info);
return false;
}
CheckedInt<GLsizei> checked_neededByteCount = checked_byteCount.toChecked<GLsizei>() + byteOffset;
if (!checked_neededByteCount.isValid()) {
ErrorInvalidOperation("%s: overflow in byteOffset+byteCount", info);
return false;
}
if (uint32_t(checked_neededByteCount.value()) > elemArrayBuffer.ByteLength()) {
ErrorInvalidOperation("%s: bound element array buffer is too small for given count and offset", info);
return false;
}
if (!ValidateBufferFetching(info))
return false;
if (!mMaxFetchedVertices ||
!elemArrayBuffer.Validate(type, mMaxFetchedVertices - 1, first, count, out_upperBound))
{
ErrorInvalidOperation(
"%s: bound vertex attribute buffers do not have sufficient "
"size for given indices from the bound element array", info);
return false;
}
if (uint32_t(primcount) > mMaxFetchedInstances) {
ErrorInvalidOperation("%s: bound instance attribute buffers do not have sufficient size for given primcount", info);
return false;
}
// Bug 1008310 - Check if buffer has been used with a different previous type
if (elemArrayBuffer.IsElementArrayUsedWithMultipleTypes()) {
GenerateWarning("%s: bound element array buffer previously used with a type other than "
"%s, this will affect performance.",
info,
WebGLContext::EnumName(type));
}
MOZ_ASSERT(gl->IsCurrent());
if (mBoundDrawFramebuffer) {
if (!mBoundDrawFramebuffer->ValidateAndInitAttachments(info))
return false;
} else {
ClearBackbufferIfNeeded();
}
if (!DoFakeVertexAttrib0(mMaxFetchedVertices)) {
return false;
}
return true;
}
bool SkeletonState::DecodeFisbone(ogg_packet* aPacket)
{
if (aPacket->bytes < static_cast<long>(FISBONE_MSG_FIELDS_OFFSET + 4)) {
return false;
}
uint32_t offsetMsgField = LittleEndian::readUint32(aPacket->packet + FISBONE_MSG_FIELDS_OFFSET);
if (aPacket->bytes < static_cast<long>(FISBONE_SERIALNO_OFFSET + 4)) {
return false;
}
uint32_t serialno = LittleEndian::readUint32(aPacket->packet + FISBONE_SERIALNO_OFFSET);
CheckedUint32 checked_fields_pos = CheckedUint32(FISBONE_MSG_FIELDS_OFFSET) + offsetMsgField;
if (!checked_fields_pos.isValid() ||
aPacket->bytes < static_cast<int64_t>(checked_fields_pos.value())) {
return false;
}
int64_t msgLength = aPacket->bytes - checked_fields_pos.value();
char* msgProbe = (char*)aPacket->packet + checked_fields_pos.value();
char* msgHead = msgProbe;
nsAutoPtr<MessageField> field(new MessageField());
const static FieldPatternType kFieldTypeMaps[] = {
{"Content-Type:", eContentType},
{"Role:", eRole},
{"Name:", eName},
{"Language:", eLanguage},
{"Title:", eTitle},
{"Display-hint:", eDisplayHint},
{"Altitude:", eAltitude},
{"TrackOrder:", eTrackOrder},
{"Track dependencies:", eTrackDependencies}
};
bool isContentTypeParsed = false;
while (msgLength > 1) {
if (*msgProbe == '\r' && *(msgProbe+1) == '\n') {
nsAutoCString strMsg(msgHead, msgProbe-msgHead);
for (size_t i = 0; i < ArrayLength(kFieldTypeMaps); i++) {
if (strMsg.Find(kFieldTypeMaps[i].mPatternToRecognize) != -1) {
// The content of message header fields follows [RFC2822], and the
// mandatory message field must be encoded in US-ASCII, others
// must be be encoded in UTF-8. "Content-Type" must come first
// for all of message header fields.
// See http://svn.annodex.net/standards/draft-pfeiffer-oggskeleton-current.txt.
if (i != 0 && !isContentTypeParsed) {
return false;
}
if ((i == 0 && IsASCII(strMsg)) || (i != 0 && IsUTF8(strMsg))) {
EMsgHeaderType eHeaderType = kFieldTypeMaps[i].mMsgHeaderType;
if (!field->mValuesStore.Contains(eHeaderType)) {
uint32_t nameLen = strlen(kFieldTypeMaps[i].mPatternToRecognize);
field->mValuesStore.Put(eHeaderType, new nsCString(msgHead+nameLen,
msgProbe-msgHead-nameLen));
}
isContentTypeParsed = i==0 ? true : isContentTypeParsed;
}
break;
}
}
msgProbe += 2;
msgLength -= 2;
msgHead = msgProbe;
continue;
}
msgLength--;
msgProbe++;
};
if (!mMsgFieldStore.Contains(serialno)) {
mMsgFieldStore.Put(serialno, field.forget());
} else {
return false;
}
return true;
}
nsresult nsRawReader::ReadMetadata(nsVideoInfo* aInfo,
nsHTMLMediaElement::MetadataTags** aTags)
{
NS_ASSERTION(mDecoder->OnDecodeThread(),
"Should be on decode thread.");
MediaResource* resource = mDecoder->GetResource();
NS_ASSERTION(resource, "Decoder has no media resource");
if (!ReadFromResource(resource, reinterpret_cast<uint8_t*>(&mMetadata),
sizeof(mMetadata)))
return NS_ERROR_FAILURE;
// Validate the header
if (!(mMetadata.headerPacketID == 0 /* Packet ID of 0 for the header*/ &&
mMetadata.codecID == RAW_ID /* "YUV" */ &&
mMetadata.majorVersion == 0 &&
mMetadata.minorVersion == 1))
return NS_ERROR_FAILURE;
CheckedUint32 dummy = CheckedUint32(static_cast<uint32_t>(mMetadata.frameWidth)) *
static_cast<uint32_t>(mMetadata.frameHeight);
NS_ENSURE_TRUE(dummy.isValid(), NS_ERROR_FAILURE);
if (mMetadata.aspectDenominator == 0 ||
mMetadata.framerateDenominator == 0)
return NS_ERROR_FAILURE; // Invalid data
// Determine and verify frame display size.
float pixelAspectRatio = static_cast<float>(mMetadata.aspectNumerator) /
mMetadata.aspectDenominator;
nsIntSize display(mMetadata.frameWidth, mMetadata.frameHeight);
ScaleDisplayByAspectRatio(display, pixelAspectRatio);
mPicture = nsIntRect(0, 0, mMetadata.frameWidth, mMetadata.frameHeight);
nsIntSize frameSize(mMetadata.frameWidth, mMetadata.frameHeight);
if (!nsVideoInfo::ValidateVideoRegion(frameSize, mPicture, display)) {
// Video track's frame sizes will overflow. Fail.
return NS_ERROR_FAILURE;
}
mInfo.mHasVideo = true;
mInfo.mHasAudio = false;
mInfo.mDisplay = display;
mFrameRate = static_cast<float>(mMetadata.framerateNumerator) /
mMetadata.framerateDenominator;
// Make some sanity checks
if (mFrameRate > 45 ||
mFrameRate == 0 ||
pixelAspectRatio == 0 ||
mMetadata.frameWidth > 2000 ||
mMetadata.frameHeight > 2000 ||
mMetadata.chromaChannelBpp != 4 ||
mMetadata.lumaChannelBpp != 8 ||
mMetadata.colorspace != 1 /* 4:2:0 */)
return NS_ERROR_FAILURE;
mFrameSize = mMetadata.frameWidth * mMetadata.frameHeight *
(mMetadata.lumaChannelBpp + mMetadata.chromaChannelBpp) / 8.0 +
sizeof(nsRawPacketHeader);
int64_t length = resource->GetLength();
if (length != -1) {
mozilla::ReentrantMonitorAutoEnter autoMonitor(mDecoder->GetReentrantMonitor());
mDecoder->GetStateMachine()->SetDuration(USECS_PER_S *
(length - sizeof(nsRawVideoHeader)) /
(mFrameSize * mFrameRate));
}
*aInfo = mInfo;
*aTags = nullptr;
return NS_OK;
}
