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Bug 832446 - Don't use the high-quality downscaler on multipart images. r=jrmuizel

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This commit is contained in:
Joe Drew 2013-01-21 11:37:54 -05:00
parent f45b8b872b
commit 441cdfe6be
1 changed files with 3 additions and 1 deletions
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4
image/src/RasterImage.cpp
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@ -2905,8 +2905,10 @@ RasterImage::CanScale(gfxPattern::GraphicsFilter aFilter,
{
// The high-quality scaler requires Skia.
#ifdef MOZ_ENABLE_SKIA
// We don't use the scaler for animated or multipart images to avoid doing a
// bunch of work on an image that just gets thrown away.
if (gHQDownscaling && aFilter == gfxPattern::FILTER_GOOD &&
!mAnim && mDecoded && IsDownscale(aScale)) {
!mAnim && mDecoded && !mMultipart && IsDownscale(aScale)) {
gfxFloat factor = gHQDownscalingMinFactor / 1000.0;
return (aScale.width < factor || aScale.height < factor);
}