44 lines
1.4 KiB
Diff
44 lines
1.4 KiB
Diff
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Copied from: https://hg.mozilla.org/releases/mozilla-esr38/rev/8bfaa27698ca
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Mozilla Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1146335
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# HG changeset patch
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# User Seth Fowler <mark.seth.fowler@gmail.com>
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# Date 1428627143 25200
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# Node ID 8bfaa27698ca0720d5c9f3910ab7148b38db0625
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# Parent 9d14787bd10e6f3013263a2cae0bcc78bebde1db
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Bug 1146335 (Part 2) - Fix an off-by-one error in image::Downscaler. r=tn a=lizzard
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diff --git a/image/src/Downscaler.cpp b/image/src/Downscaler.cpp
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--- a/image/src/Downscaler.cpp
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+++ b/image/src/Downscaler.cpp
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@@ -160,20 +160,26 @@ Downscaler::CommitRow()
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int32_t inLineToRead = filterOffset + mLinesInBuffer;
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MOZ_ASSERT(mCurrentInLine <= inLineToRead, "Reading past end of input");
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if (mCurrentInLine == inLineToRead) {
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skia::ConvolveHorizontally(mRowBuffer.get(), *mXFilter,
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mWindow[mLinesInBuffer++], mHasAlpha,
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/* use_sse2 = */ true);
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}
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- while (mLinesInBuffer == filterLength &&
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- mCurrentOutLine < mTargetSize.height) {
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+ MOZ_ASSERT(mCurrentOutLine < mTargetSize.height,
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+ "Writing past end of output");
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+
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+ while (mLinesInBuffer == filterLength) {
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DownscaleInputLine();
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+ if (mCurrentOutLine == mTargetSize.height) {
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+ break; // We're done.
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+ }
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+
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GetFilterOffsetAndLength(mYFilter, mCurrentOutLine,
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&filterOffset, &filterLength);
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}
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mCurrentInLine += 1;
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}
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bool
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