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Bug 1251644 - Snap object-contain fit if we were going to reduce the size by less than one css pixel. r=seth

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This commit is contained in:
Matt Woodrow 2016-04-07 18:51:45 +12:00
parent baaa0fca1d
commit daea81cf90
1 changed files with 8 additions and 0 deletions
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8
layout/base/nsCSSRendering.cpp
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@ -4990,9 +4990,17 @@ nsImageRenderer::ComputeConstrainedSize(const nsSize& aConstrainingSize,
size.width = aConstrainingSize.width;
size.height = NSCoordSaturatingNonnegativeMultiply(
aIntrinsicRatio.height, scaleX);
// If we're reducing the size by less than one css pixel, then just use the
// constraining size.
if (aFitType == CONTAIN && aConstrainingSize.height - size.height < nsPresContext::AppUnitsPerCSSPixel()) {
size.height = aConstrainingSize.height;
}
} else {
size.width = NSCoordSaturatingNonnegativeMultiply(
aIntrinsicRatio.width, scaleY);
if (aFitType == CONTAIN && aConstrainingSize.width - size.width < nsPresContext::AppUnitsPerCSSPixel()) {
size.width = aConstrainingSize.width;
}
size.height = aConstrainingSize.height;
}
return size;