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Bug 1224200. Allow downscaler to get (and ignore) new input lines after it has finished producing all output lines. r=milan

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This commit is contained in:
Timothy Nikkel 2016-01-13 17:16:32 -06:00
parent 6b9b8a3ac3
commit e5e2a31836
1 changed files with 25 additions and 24 deletions
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49
image/Downscaler.cpp
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@ -199,33 +199,34 @@ Downscaler::CommitRow()
{
MOZ_ASSERT(mOutputBuffer, "Should have a current frame");
MOZ_ASSERT(mCurrentInLine < mOriginalSize.height, "Past end of input");
MOZ_ASSERT(mCurrentOutLine < mTargetSize.height, "Past end of output");
int32_t filterOffset = 0;
int32_t filterLength = 0;
GetFilterOffsetAndLength(mYFilter, mCurrentOutLine,
&filterOffset, &filterLength);
int32_t inLineToRead = filterOffset + mLinesInBuffer;
MOZ_ASSERT(mCurrentInLine <= inLineToRead, "Reading past end of input");
if (mCurrentInLine == inLineToRead) {
skia::ConvolveHorizontally(mRowBuffer.get(), *mXFilter,
mWindow[mLinesInBuffer++], mHasAlpha,
supports_sse2());
}
MOZ_ASSERT(mCurrentOutLine < mTargetSize.height,
"Writing past end of output");
while (mLinesInBuffer == filterLength) {
DownscaleInputLine();
if (mCurrentOutLine == mTargetSize.height) {
break; // We're done.
}
if (mCurrentOutLine < mTargetSize.height) {
int32_t filterOffset = 0;
int32_t filterLength = 0;
GetFilterOffsetAndLength(mYFilter, mCurrentOutLine,
&filterOffset, &filterLength);
int32_t inLineToRead = filterOffset + mLinesInBuffer;
MOZ_ASSERT(mCurrentInLine <= inLineToRead, "Reading past end of input");
if (mCurrentInLine == inLineToRead) {
skia::ConvolveHorizontally(mRowBuffer.get(), *mXFilter,
mWindow[mLinesInBuffer++], mHasAlpha,
supports_sse2());
}
MOZ_ASSERT(mCurrentOutLine < mTargetSize.height,
"Writing past end of output");
while (mLinesInBuffer == filterLength) {
DownscaleInputLine();
if (mCurrentOutLine == mTargetSize.height) {
break; // We're done.
}
GetFilterOffsetAndLength(mYFilter, mCurrentOutLine,
&filterOffset, &filterLength);
}
}
mCurrentInLine += 1;