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Bug 1249550 (part 1) - Flip BMPs with negative height when downscaling. r=tn.

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This commit is contained in:
Nicholas Nethercote 2016-02-22 13:38:58 +11:00
parent 18cead6ef6
commit 0494c4820e
1 changed files with 3 additions and 2 deletions
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5
image/decoders/nsBMPDecoder.cpp
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@ -682,10 +682,11 @@ nsBMPDecoder::ReadBitfields(const char* aData, size_t aLength)
if (mDownscaler) { if (mDownscaler) {
// BMPs store their rows in reverse order, so the downscaler needs to // BMPs store their rows in reverse order, so the downscaler needs to
// reverse them again when writing its output. // reverse them again when writing its output. Unless the height is
// negative!
rv = mDownscaler->BeginFrame(GetSize(), Nothing(), rv = mDownscaler->BeginFrame(GetSize(), Nothing(),
mImageData, mMayHaveTransparency, mImageData, mMayHaveTransparency,
/* aFlipVertically = */ true); /* aFlipVertically = */ mH.mHeight >= 0);
if (NS_FAILED(rv)) { if (NS_FAILED(rv)) {
return Transition::TerminateFailure(); return Transition::TerminateFailure();
} }