void
Decoder::Write(const char* aBuffer, uint32_t aCount)
{
PROFILER_LABEL("ImageDecoder", "Write");
// We're strict about decoder errors
NS_ABORT_IF_FALSE(!HasDecoderError(),
"Not allowed to make more decoder calls after error!");
// If a data error occured, just ignore future data
if (HasDataError())
return;
if (IsSizeDecode() && HasSize()) {
// More data came in since we found the size. We have nothing to do here.
return;
}
// Pass the data along to the implementation
WriteInternal(aBuffer, aCount);
// If we're a synchronous decoder and we need a new frame to proceed, let's
// create one and call it again.
while (mSynchronous && NeedsNewFrame() && !HasDataError()) {
nsresult rv = AllocateFrame();
if (NS_SUCCEEDED(rv)) {
// Tell the decoder to use the data it saved when it asked for a new frame.
WriteInternal(nullptr, 0);
}
}
}
void
Decoder::Write(const char* aBuffer, uint32_t aCount, DecodeStrategy aStrategy)
{
PROFILER_LABEL("ImageDecoder", "Write",
js::ProfileEntry::Category::GRAPHICS);
MOZ_ASSERT(NS_IsMainThread() || aStrategy == DecodeStrategy::ASYNC);
// We're strict about decoder errors
MOZ_ASSERT(!HasDecoderError(),
"Not allowed to make more decoder calls after error!");
// Begin recording telemetry data.
TimeStamp start = TimeStamp::Now();
mChunkCount++;
// Keep track of the total number of bytes written.
mBytesDecoded += aCount;
// If we're flushing data, clear the flag.
if (aBuffer == nullptr && aCount == 0) {
MOZ_ASSERT(mNeedsToFlushData, "Flushing when we don't need to");
mNeedsToFlushData = false;
}
// If a data error occured, just ignore future data.
if (HasDataError())
return;
if (IsSizeDecode() && HasSize()) {
// More data came in since we found the size. We have nothing to do here.
return;
}
// Pass the data along to the implementation
WriteInternal(aBuffer, aCount, aStrategy);
// If we're a synchronous decoder and we need a new frame to proceed, let's
// create one and call it again.
if (aStrategy == DecodeStrategy::SYNC) {
while (NeedsNewFrame() && !HasDataError()) {
nsresult rv = AllocateFrame();
if (NS_SUCCEEDED(rv)) {
// Use the data we saved when we asked for a new frame.
WriteInternal(nullptr, 0, aStrategy);
}
mNeedsToFlushData = false;
}
}
// Finish telemetry.
mDecodeTime += (TimeStamp::Now() - start);
}
// CreateFrame() is used for both simple and animated images
void nsPNGDecoder::CreateFrame(png_uint_32 x_offset, png_uint_32 y_offset,
int32_t width, int32_t height,
gfx::SurfaceFormat format)
{
MOZ_ASSERT(HasSize());
if (format == gfx::SurfaceFormat::B8G8R8A8) {
PostHasTransparency();
}
// Our first full frame is automatically created by the image decoding
// infrastructure. Just use it as long as it matches up.
nsIntRect neededRect(x_offset, y_offset, width, height);
nsRefPtr<imgFrame> currentFrame = GetCurrentFrame();
if (!currentFrame->GetRect().IsEqualEdges(neededRect)) {
if (mNumFrames == 0) {
// We need padding on the first frame, which means that we don't draw into
// part of the image at all. Report that as transparency.
PostHasTransparency();
}
NeedNewFrame(mNumFrames, x_offset, y_offset, width, height, format);
} else if (mNumFrames != 0) {
NeedNewFrame(mNumFrames, x_offset, y_offset, width, height, format);
}
mFrameRect = neededRect;
MOZ_LOG(GetPNGDecoderAccountingLog(), LogLevel::Debug,
("PNGDecoderAccounting: nsPNGDecoder::CreateFrame -- created "
"image frame with %dx%d pixels in container %p",
width, height,
&mImage));
#ifdef PNG_APNG_SUPPORTED
if (png_get_valid(mPNG, mInfo, PNG_INFO_acTL)) {
mAnimInfo = AnimFrameInfo(mPNG, mInfo);
if (mAnimInfo.mDispose == DisposalMethod::CLEAR) {
// We may have to display the background under this image during
// animation playback, so we regard it as transparent.
PostHasTransparency();
}
}
#endif
}
//******************************************************************************
void
nsGIFDecoder2::BeginImageFrame(uint16_t aDepth)
{
MOZ_ASSERT(HasSize());
gfx::SurfaceFormat format;
if (mGIFStruct.is_transparent) {
format = gfx::SurfaceFormat::B8G8R8A8;
PostHasTransparency();
} else {
format = gfx::SurfaceFormat::B8G8R8X8;
}
// Use correct format, RGB for first frame, PAL for following frames
// and include transparency to allow for optimization of opaque images
if (mGIFStruct.images_decoded) {
// Image data is stored with original depth and palette
NeedNewFrame(mGIFStruct.images_decoded, mGIFStruct.x_offset,
mGIFStruct.y_offset, mGIFStruct.width, mGIFStruct.height,
format, aDepth);
} else {
nsRefPtr<imgFrame> currentFrame = GetCurrentFrame();
// Our first full frame is automatically created by the image decoding
// infrastructure. Just use it as long as it matches up.
if (!currentFrame->GetRect().IsEqualEdges(nsIntRect(mGIFStruct.x_offset,
mGIFStruct.y_offset,
mGIFStruct.width,
mGIFStruct.height))) {
// We need padding on the first frame, which means that we don't draw into
// part of the image at all. Report that as transparency.
PostHasTransparency();
// Regardless of depth of input, image is decoded into 24bit RGB
NeedNewFrame(mGIFStruct.images_decoded, mGIFStruct.x_offset,
mGIFStruct.y_offset, mGIFStruct.width, mGIFStruct.height,
format);
}
}
mCurrentFrameIndex = mGIFStruct.images_decoded;
}
//******************************************************************************
nsresult
nsGIFDecoder2::BeginImageFrame(uint16_t aDepth)
{
MOZ_ASSERT(HasSize());
gfx::SurfaceFormat format;
if (mGIFStruct.is_transparent) {
format = gfx::SurfaceFormat::B8G8R8A8;
PostHasTransparency();
} else {
format = gfx::SurfaceFormat::B8G8R8X8;
}
nsIntRect frameRect(mGIFStruct.x_offset, mGIFStruct.y_offset,
mGIFStruct.width, mGIFStruct.height);
// Use correct format, RGB for first frame, PAL for following frames
// and include transparency to allow for optimization of opaque images
nsresult rv = NS_OK;
if (mGIFStruct.images_decoded) {
// Image data is stored with original depth and palette.
rv = AllocateFrame(mGIFStruct.images_decoded, GetSize(),
frameRect, format, aDepth);
} else {
if (!nsIntRect(nsIntPoint(), GetSize()).IsEqualEdges(frameRect)) {
// We need padding on the first frame, which means that we don't draw into
// part of the image at all. Report that as transparency.
PostHasTransparency();
}
// Regardless of depth of input, the first frame is decoded into 24bit RGB.
rv = AllocateFrame(mGIFStruct.images_decoded, GetSize(),
frameRect, format);
}
mCurrentFrameIndex = mGIFStruct.images_decoded;
return rv;
}
//******************************************************************************
void nsGIFDecoder2::BeginImageFrame(uint16_t aDepth)
{
gfx::SurfaceFormat format;
if (mGIFStruct.is_transparent)
format = gfx::SurfaceFormat::B8G8R8A8;
else
format = gfx::SurfaceFormat::B8G8R8X8;
MOZ_ASSERT(HasSize());
// Use correct format, RGB for first frame, PAL for following frames
// and include transparency to allow for optimization of opaque images
if (mGIFStruct.images_decoded) {
// Image data is stored with original depth and palette
NeedNewFrame(mGIFStruct.images_decoded, mGIFStruct.x_offset,
mGIFStruct.y_offset, mGIFStruct.width, mGIFStruct.height,
format, aDepth);
}
// Our first full frame is automatically created by the image decoding
// infrastructure. Just use it as long as it matches up.
else if (!GetCurrentFrame()->GetRect().IsEqualEdges(nsIntRect(mGIFStruct.x_offset,
mGIFStruct.y_offset,
mGIFStruct.width,
mGIFStruct.height))) {
// Regardless of depth of input, image is decoded into 24bit RGB
NeedNewFrame(mGIFStruct.images_decoded, mGIFStruct.x_offset,
mGIFStruct.y_offset, mGIFStruct.width, mGIFStruct.height,
format);
} else {
// Our preallocated frame matches up, with the possible exception of alpha.
if (format == gfx::SurfaceFormat::B8G8R8X8) {
GetCurrentFrame()->SetHasNoAlpha();
}
}
mCurrentFrameIndex = mGIFStruct.images_decoded;
}
// CreateFrame() is used for both simple and animated images
void nsPNGDecoder::CreateFrame(png_uint_32 x_offset, png_uint_32 y_offset,
int32_t width, int32_t height,
gfx::SurfaceFormat format)
{
// Our first full frame is automatically created by the image decoding
// infrastructure. Just use it as long as it matches up.
MOZ_ASSERT(HasSize());
if (mNumFrames != 0 ||
!GetCurrentFrame()->GetRect().IsEqualEdges(nsIntRect(x_offset, y_offset, width, height))) {
NeedNewFrame(mNumFrames, x_offset, y_offset, width, height, format);
} else if (mNumFrames == 0) {
// Our preallocated frame matches up, with the possible exception of alpha.
if (format == gfx::SurfaceFormat::B8G8R8X8) {
GetCurrentFrame()->SetHasNoAlpha();
}
}
mFrameRect.x = x_offset;
mFrameRect.y = y_offset;
mFrameRect.width = width;
mFrameRect.height = height;
PR_LOG(GetPNGDecoderAccountingLog(), PR_LOG_DEBUG,
("PNGDecoderAccounting: nsPNGDecoder::CreateFrame -- created "
"image frame with %dx%d pixels in container %p",
width, height,
&mImage));
mFrameHasNoAlpha = true;
#ifdef PNG_APNG_SUPPORTED
if (png_get_valid(mPNG, mInfo, PNG_INFO_acTL)) {
mAnimInfo = AnimFrameInfo(mPNG, mInfo);
}
#endif
}
void
Decoder::Write(const char* aBuffer, uint32_t aCount)
{
PROFILER_LABEL("ImageDecoder", "Write",
js::ProfileEntry::Category::GRAPHICS);
MOZ_ASSERT(aBuffer);
MOZ_ASSERT(aCount > 0);
// We're strict about decoder errors
MOZ_ASSERT(!HasDecoderError(),
"Not allowed to make more decoder calls after error!");
// Begin recording telemetry data.
TimeStamp start = TimeStamp::Now();
mChunkCount++;
// Keep track of the total number of bytes written.
mBytesDecoded += aCount;
// If a data error occured, just ignore future data.
if (HasDataError()) {
return;
}
if (IsMetadataDecode() && HasSize()) {
// More data came in since we found the size. We have nothing to do here.
return;
}
// Pass the data along to the implementation.
WriteInternal(aBuffer, aCount);
// Finish telemetry.
mDecodeTime += (TimeStamp::Now() - start);
}
void
nsICODecoder::WriteInternal(const char* aBuffer, uint32_t aCount, DecodeStrategy aStrategy)
{
NS_ABORT_IF_FALSE(!HasError(), "Shouldn't call WriteInternal after error!");
if (!aCount) {
if (mContainedDecoder) {
WriteToContainedDecoder(aBuffer, aCount, aStrategy);
}
return;
}
while (aCount && (mPos < ICONCOUNTOFFSET)) { // Skip to the # of icons.
if (mPos == 2) { // if the third byte is 1: This is an icon, 2: a cursor
if ((*aBuffer != 1) && (*aBuffer != 2)) {
PostDataError();
return;
}
mIsCursor = (*aBuffer == 2);
}
mPos++; aBuffer++; aCount--;
}
if (mPos == ICONCOUNTOFFSET && aCount >= 2) {
mNumIcons = LittleEndian::readUint16(reinterpret_cast<const uint16_t*>(aBuffer));
aBuffer += 2;
mPos += 2;
aCount -= 2;
}
if (mNumIcons == 0)
return; // Nothing to do.
uint16_t colorDepth = 0;
nsIntSize prefSize = mImage.GetRequestedResolution();
if (prefSize.width == 0 && prefSize.height == 0) {
prefSize.SizeTo(PREFICONSIZE, PREFICONSIZE);
}
// A measure of the difference in size between the entry we've found
// and the requested size. We will choose the smallest image that is
// >= requested size (i.e. we assume it's better to downscale a larger
// icon than to upscale a smaller one).
int32_t diff = INT_MIN;
// Loop through each entry's dir entry
while (mCurrIcon < mNumIcons) {
if (mPos >= DIRENTRYOFFSET + (mCurrIcon * sizeof(mDirEntryArray)) &&
mPos < DIRENTRYOFFSET + ((mCurrIcon + 1) * sizeof(mDirEntryArray))) {
uint32_t toCopy = sizeof(mDirEntryArray) -
(mPos - DIRENTRYOFFSET - mCurrIcon * sizeof(mDirEntryArray));
if (toCopy > aCount) {
toCopy = aCount;
}
memcpy(mDirEntryArray + sizeof(mDirEntryArray) - toCopy, aBuffer, toCopy);
mPos += toCopy;
aCount -= toCopy;
aBuffer += toCopy;
}
if (aCount == 0)
return; // Need more data
IconDirEntry e;
if (mPos == (DIRENTRYOFFSET + ICODIRENTRYSIZE) +
(mCurrIcon * sizeof(mDirEntryArray))) {
mCurrIcon++;
ProcessDirEntry(e);
// We can't use GetRealWidth and GetRealHeight here because those operate
// on mDirEntry, here we are going through each item in the directory.
// Calculate the delta between this image's size and the desired size,
// so we can see if it is better than our current-best option.
// In the case of several equally-good images, we use the last one.
int32_t delta = (e.mWidth == 0 ? 256 : e.mWidth) - prefSize.width +
(e.mHeight == 0 ? 256 : e.mHeight) - prefSize.height;
if (e.mBitCount >= colorDepth &&
((diff < 0 && delta >= diff) || (delta >= 0 && delta <= diff))) {
diff = delta;
mImageOffset = e.mImageOffset;
// ensure mImageOffset is >= size of the direntry headers (bug #245631)
uint32_t minImageOffset = DIRENTRYOFFSET +
mNumIcons * sizeof(mDirEntryArray);
if (mImageOffset < minImageOffset) {
PostDataError();
return;
}
colorDepth = e.mBitCount;
memcpy(&mDirEntry, &e, sizeof(IconDirEntry));
}
}
}
if (mPos < mImageOffset) {
// Skip to (or at least towards) the desired image offset
uint32_t toSkip = mImageOffset - mPos;
if (toSkip > aCount)
toSkip = aCount;
mPos += toSkip;
aBuffer += toSkip;
aCount -= toSkip;
}
// If we are within the first PNGSIGNATURESIZE bytes of the image data,
// then we have either a BMP or a PNG. We use the first PNGSIGNATURESIZE
// bytes to determine which one we have.
if (mCurrIcon == mNumIcons && mPos >= mImageOffset &&
mPos < mImageOffset + PNGSIGNATURESIZE)
{
uint32_t toCopy = PNGSIGNATURESIZE - (mPos - mImageOffset);
if (toCopy > aCount) {
toCopy = aCount;
}
memcpy(mSignature + (mPos - mImageOffset), aBuffer, toCopy);
mPos += toCopy;
aCount -= toCopy;
aBuffer += toCopy;
mIsPNG = !memcmp(mSignature, nsPNGDecoder::pngSignatureBytes,
PNGSIGNATURESIZE);
if (mIsPNG) {
mContainedDecoder = new nsPNGDecoder(mImage);
mContainedDecoder->SetObserver(mObserver);
mContainedDecoder->SetSizeDecode(IsSizeDecode());
mContainedDecoder->InitSharedDecoder(mImageData, mImageDataLength,
mColormap, mColormapSize,
mCurrentFrame);
if (!WriteToContainedDecoder(mSignature, PNGSIGNATURESIZE, aStrategy)) {
return;
}
}
}
// If we have a PNG, let the PNG decoder do all of the rest of the work
if (mIsPNG && mContainedDecoder && mPos >= mImageOffset + PNGSIGNATURESIZE) {
if (!WriteToContainedDecoder(aBuffer, aCount, aStrategy)) {
return;
}
if (!HasSize() && mContainedDecoder->HasSize()) {
PostSize(mContainedDecoder->GetImageMetadata().GetWidth(),
mContainedDecoder->GetImageMetadata().GetHeight());
}
mPos += aCount;
aBuffer += aCount;
aCount = 0;
// Raymond Chen says that 32bpp only are valid PNG ICOs
// http://blogs.msdn.com/b/oldnewthing/archive/2010/10/22/10079192.aspx
if (!IsSizeDecode() &&
!static_cast<nsPNGDecoder*>(mContainedDecoder.get())->IsValidICO()) {
PostDataError();
}
return;
}
// We've processed all of the icon dir entries and are within the
// bitmap info size
if (!mIsPNG && mCurrIcon == mNumIcons && mPos >= mImageOffset &&
mPos >= mImageOffset + PNGSIGNATURESIZE &&
mPos < mImageOffset + BITMAPINFOSIZE) {
// As we were decoding, we did not know if we had a PNG signature or the
// start of a bitmap information header. At this point we know we had
// a bitmap information header and not a PNG signature, so fill the bitmap
// information header with the data it should already have.
memcpy(mBIHraw, mSignature, PNGSIGNATURESIZE);
// We've found the icon.
uint32_t toCopy = sizeof(mBIHraw) - (mPos - mImageOffset);
if (toCopy > aCount)
toCopy = aCount;
memcpy(mBIHraw + (mPos - mImageOffset), aBuffer, toCopy);
mPos += toCopy;
aCount -= toCopy;
aBuffer += toCopy;
}
// If we have a BMP inside the ICO and we have read the BIH header
if (!mIsPNG && mPos == mImageOffset + BITMAPINFOSIZE) {
// Make sure we have a sane value for the bitmap information header
int32_t bihSize = ExtractBIHSizeFromBitmap(reinterpret_cast<int8_t*>(mBIHraw));
if (bihSize != BITMAPINFOSIZE) {
PostDataError();
return;
}
// We are extracting the BPP from the BIH header as it should be trusted
// over the one we have from the icon header
mBPP = ExtractBPPFromBitmap(reinterpret_cast<int8_t*>(mBIHraw));
// Init the bitmap decoder which will do most of the work for us
// It will do everything except the AND mask which isn't present in bitmaps
// bmpDecoder is for local scope ease, it will be freed by mContainedDecoder
nsBMPDecoder *bmpDecoder = new nsBMPDecoder(mImage);
mContainedDecoder = bmpDecoder;
bmpDecoder->SetUseAlphaData(true);
mContainedDecoder->SetObserver(mObserver);
mContainedDecoder->SetSizeDecode(IsSizeDecode());
mContainedDecoder->InitSharedDecoder(mImageData, mImageDataLength,
mColormap, mColormapSize,
mCurrentFrame);
// The ICO format when containing a BMP does not include the 14 byte
// bitmap file header. To use the code of the BMP decoder we need to
// generate this header ourselves and feed it to the BMP decoder.
int8_t bfhBuffer[BMPFILEHEADERSIZE];
if (!FillBitmapFileHeaderBuffer(bfhBuffer)) {
PostDataError();
return;
}
if (!WriteToContainedDecoder((const char*)bfhBuffer, sizeof(bfhBuffer), aStrategy)) {
return;
}
// Setup the cursor hot spot if one is present
SetHotSpotIfCursor();
// Fix the ICO height from the BIH.
// Fix the height on the BIH to be /2 so our BMP decoder will understand.
if (!FixBitmapHeight(reinterpret_cast<int8_t*>(mBIHraw))) {
PostDataError();
return;
}
// Fix the ICO width from the BIH.
if (!FixBitmapWidth(reinterpret_cast<int8_t*>(mBIHraw))) {
PostDataError();
return;
}
// Write out the BMP's bitmap info header
if (!WriteToContainedDecoder(mBIHraw, sizeof(mBIHraw), aStrategy)) {
return;
}
PostSize(mContainedDecoder->GetImageMetadata().GetWidth(),
mContainedDecoder->GetImageMetadata().GetHeight());
// We have the size. If we're doing a size decode, we got what
// we came for.
if (IsSizeDecode())
return;
// Sometimes the ICO BPP header field is not filled out
// so we should trust the contained resource over our own
// information.
mBPP = bmpDecoder->GetBitsPerPixel();
// Check to make sure we have valid color settings
uint16_t numColors = GetNumColors();
if (numColors == (uint16_t)-1) {
PostDataError();
return;
}
}
// If we have a BMP
if (!mIsPNG && mContainedDecoder && mPos >= mImageOffset + BITMAPINFOSIZE) {
uint16_t numColors = GetNumColors();
if (numColors == (uint16_t)-1) {
PostDataError();
return;
}
// Feed the actual image data (not including headers) into the BMP decoder
uint32_t bmpDataOffset = mDirEntry.mImageOffset + BITMAPINFOSIZE;
uint32_t bmpDataEnd = mDirEntry.mImageOffset + BITMAPINFOSIZE +
static_cast<nsBMPDecoder*>(mContainedDecoder.get())->GetCompressedImageSize() +
4 * numColors;
// If we are feeding in the core image data, but we have not yet
// reached the ICO's 'AND buffer mask'
if (mPos >= bmpDataOffset && mPos < bmpDataEnd) {
// Figure out how much data the BMP decoder wants
uint32_t toFeed = bmpDataEnd - mPos;
if (toFeed > aCount) {
toFeed = aCount;
}
if (!WriteToContainedDecoder(aBuffer, toFeed, aStrategy)) {
return;
}
mPos += toFeed;
aCount -= toFeed;
aBuffer += toFeed;
}
// If the bitmap is fully processed, treat any left over data as the ICO's
// 'AND buffer mask' which appears after the bitmap resource.
if (!mIsPNG && mPos >= bmpDataEnd) {
// There may be an optional AND bit mask after the data. This is
// only used if the alpha data is not already set. The alpha data
// is used for 32bpp bitmaps as per the comment in ICODecoder.h
// The alpha mask should be checked in all other cases.
if (static_cast<nsBMPDecoder*>(mContainedDecoder.get())->GetBitsPerPixel() != 32 ||
!static_cast<nsBMPDecoder*>(mContainedDecoder.get())->HasAlphaData()) {
uint32_t rowSize = ((GetRealWidth() + 31) / 32) * 4; // + 31 to round up
if (mPos == bmpDataEnd) {
mPos++;
mRowBytes = 0;
mCurLine = GetRealHeight();
mRow = (uint8_t*)moz_realloc(mRow, rowSize);
if (!mRow) {
PostDecoderError(NS_ERROR_OUT_OF_MEMORY);
return;
}
}
// Ensure memory has been allocated before decoding.
NS_ABORT_IF_FALSE(mRow, "mRow is null");
if (!mRow) {
PostDataError();
return;
}
while (mCurLine > 0 && aCount > 0) {
uint32_t toCopy = std::min(rowSize - mRowBytes, aCount);
if (toCopy) {
memcpy(mRow + mRowBytes, aBuffer, toCopy);
aCount -= toCopy;
aBuffer += toCopy;
mRowBytes += toCopy;
}
if (rowSize == mRowBytes) {
mCurLine--;
mRowBytes = 0;
uint32_t* imageData =
static_cast<nsBMPDecoder*>(mContainedDecoder.get())->GetImageData();
if (!imageData) {
PostDataError();
return;
}
uint32_t* decoded = imageData + mCurLine * GetRealWidth();
uint32_t* decoded_end = decoded + GetRealWidth();
uint8_t* p = mRow, *p_end = mRow + rowSize;
while (p < p_end) {
uint8_t idx = *p++;
for (uint8_t bit = 0x80; bit && decoded<decoded_end; bit >>= 1) {
// Clear pixel completely for transparency.
if (idx & bit) {
*decoded = 0;
}
decoded++;
}
}
}
}
}
void
nsWEBPDecoder::WriteInternal(const char *aBuffer, uint32_t aCount)
{
MOZ_ASSERT(!HasError(), "Shouldn't call WriteInternal after error!");
const uint8_t* buf = (const uint8_t*)aBuffer;
VP8StatusCode rv = WebPIAppend(mDecoder, buf, aCount);
if (rv == VP8_STATUS_OUT_OF_MEMORY) {
PostDecoderError(NS_ERROR_OUT_OF_MEMORY);
return;
} else if (rv == VP8_STATUS_INVALID_PARAM ||
rv == VP8_STATUS_BITSTREAM_ERROR) {
PostDataError();
return;
} else if (rv == VP8_STATUS_UNSUPPORTED_FEATURE ||
rv == VP8_STATUS_USER_ABORT) {
PostDecoderError(NS_ERROR_FAILURE);
return;
}
// Catch any remaining erroneous return value.
if (rv != VP8_STATUS_OK && rv != VP8_STATUS_SUSPENDED) {
PostDecoderError(NS_ERROR_FAILURE);
return;
}
int lastLineRead = -1;
int height = 0;
int width = 0;
int stride = 0;
mData = WebPIDecGetRGB(mDecoder, &lastLineRead, &width, &height, &stride);
// The only valid format for WebP decoding for both alpha and non-alpha
// images is BGRA, where Opaque images have an A of 255.
// Assume transparency for all images.
// XXX: This could be compositor-optimized by doing a one-time check for
// all-255 alpha pixels, but that might interfere with progressive
// decoding. Probably not worth it?
PostHasTransparency();
if (lastLineRead == -1 || !mData)
return;
if (width <= 0 || height <= 0) {
PostDataError();
return;
}
if (!HasSize())
PostSize(width, height);
if (IsSizeDecode())
return;
if (!mImageData) {
PostDecoderError(NS_ERROR_FAILURE);
return;
}
// Transfer from mData to mImageData
if (lastLineRead > mLastLine) {
for (int line = mLastLine; line < lastLineRead; line++) {
for (int pix = 0; pix < width; pix++) {
// RGBA -> BGRA
uint32_t DataOffset = 4 * (line * width + pix);
mImageData[DataOffset+0] = mData[DataOffset+2];
mImageData[DataOffset+1] = mData[DataOffset+1];
mImageData[DataOffset+2] = mData[DataOffset+0];
mImageData[DataOffset+3] = mData[DataOffset+3];
}
}
// Invalidate
nsIntRect r(0, mLastLine, width, lastLineRead);
PostInvalidation(r);
}
mLastLine = lastLineRead;
return;
}
void
nsWEBPDecoder::WriteInternal(const char *aBuffer, uint32_t aCount, DecodeStrategy)
{
NS_ABORT_IF_FALSE(!HasError(), "Shouldn't call WriteInternal after error!");
const uint8_t* buf = (const uint8_t*)aBuffer;
VP8StatusCode rv = WebPIAppend(mDecoder, buf, aCount);
if (rv == VP8_STATUS_OUT_OF_MEMORY) {
PostDecoderError(NS_ERROR_OUT_OF_MEMORY);
return;
} else if (rv == VP8_STATUS_INVALID_PARAM ||
rv == VP8_STATUS_BITSTREAM_ERROR) {
PostDataError();
return;
} else if (rv == VP8_STATUS_UNSUPPORTED_FEATURE ||
rv == VP8_STATUS_USER_ABORT) {
PostDecoderError(NS_ERROR_FAILURE);
return;
}
// Catch any remaining erroneous return value.
if (rv != VP8_STATUS_OK && rv != VP8_STATUS_SUSPENDED) {
PostDecoderError(NS_ERROR_FAILURE);
return;
}
int lastLineRead = -1;
int height = 0;
int width = 0;
int stride = 0;
mData = WebPIDecGetRGB(mDecoder, &lastLineRead, &width, &height, &stride);
if (lastLineRead == -1 || !mData)
return;
if (width <= 0 || height <= 0) {
PostDataError();
return;
}
if (!HasSize())
PostSize(width, height);
if (IsSizeDecode())
return;
uint32_t imagelength;
// First incremental Image data chunk. Special handling required.
if (mLastLine == 0 && lastLineRead > 0) {
imgFrame* aFrame;
nsresult res = mImage.EnsureFrame(0, 0, 0, width, height,
gfxASurface::ImageFormatARGB32,
(uint8_t**)&mImageData, &imagelength, &aFrame);
if (NS_FAILED(res) || !mImageData) {
PostDecoderError(NS_ERROR_FAILURE);
return;
}
}
if (!mImageData) {
PostDecoderError(NS_ERROR_FAILURE);
return;
}
if (lastLineRead > mLastLine) {
for (int line = mLastLine; line < lastLineRead; line++) {
uint32_t *cptr32 = (uint32_t*)(mImageData + (line * width));
uint8_t *cptr8 = mData + (line * stride);
for (int pix = 0; pix < width; pix++, cptr8 += 4) {
// if((cptr8[3] != 0) && (cptr8[0] != 0) && (cptr8[1] != 0) && (cptr8[2] != 0))
*cptr32++ = gfxPackedPixel(cptr8[3], cptr8[0], cptr8[1], cptr8[2]);
}
}
// Invalidate
nsIntRect r(0, mLastLine, width, lastLineRead);
PostInvalidation(r);
}
mLastLine = lastLineRead;
return;
}