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Saturate subtract translation in SkOffsetImageFilter

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Fuzzer has figured out it can overflow.

Bug: chromium:1268401
Change-Id: Ia25b8ab382a0ab868a3ca6dd9ea5f68f16d07504
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/471017
Auto-Submit: Brian Salomon <bsalomon@google.com>
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
This commit is contained in:
Brian Salomon 2021-11-12 15:35:07 -05:00 committed by SkCQ
parent 3aaed99930
commit 87e9d52f2a
1 changed files with 2 additions and 2 deletions
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4
src/effects/imagefilters/SkOffsetImageFilter.cpp
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@ -115,8 +115,8 @@ sk_sp<SkSpecialImage> SkOffsetImageFilter::onFilterImage(const Context& ctx,
SkPaint paint;
paint.setBlendMode(SkBlendMode::kSrc);
canvas->translate(SkIntToScalar(srcOffset.fX - bounds.fLeft),
SkIntToScalar(srcOffset.fY - bounds.fTop));
canvas->translate(SkIntToScalar(Sk32_sat_sub(srcOffset.fX, bounds.fLeft)),
SkIntToScalar(Sk32_sat_sub(srcOffset.fY, bounds.fTop)));
input->draw(canvas, vec.fX, vec.fY, SkSamplingOptions(), &paint);