Index: third_party/WebKit/Source/modules/canvas2d/BaseRenderingContext2D.cpp |
diff --git a/third_party/WebKit/Source/modules/canvas2d/BaseRenderingContext2D.cpp b/third_party/WebKit/Source/modules/canvas2d/BaseRenderingContext2D.cpp |
index 2029de6d7d7f812aa189ca4529e5031003f1e253..30600821d88783261f8a4bc9f636118276f37c6b 100644 |
--- a/third_party/WebKit/Source/modules/canvas2d/BaseRenderingContext2D.cpp |
+++ b/third_party/WebKit/Source/modules/canvas2d/BaseRenderingContext2D.cpp |
@@ -941,6 +941,12 @@ bool BaseRenderingContext2D::shouldDrawImageAntialiased(const FloatRect& destRec |
return destRect.width() * fabs(widthExpansion) < 1 || destRect.height() * fabs(heightExpansion) < 1; |
} |
+static bool isDrawScalingDown(const FloatRect& srcRect, const FloatRect& dstRect, float xScaleSquared, float yScaleSquared) |
+{ |
+ return dstRect.width() * dstRect.width() * xScaleSquared < srcRect.width() * srcRect.width() |
+ && dstRect.height() * dstRect.height() * yScaleSquared < srcRect.height() * srcRect.height(); |
+} |
+ |
void BaseRenderingContext2D::drawImageInternal(SkCanvas* c, CanvasImageSource* imageSource, Image* image, const FloatRect& srcRect, const FloatRect& dstRect, const SkPaint* paint) |
{ |
trackDrawCall(DrawImage); |
@@ -972,6 +978,9 @@ void BaseRenderingContext2D::drawImageInternal(SkCanvas* c, CanvasImageSource* i |
imagePaint.setImageFilter(nullptr); |
} |
+ if (!imageSmoothingEnabled() && isDrawScalingDown(srcRect, dstRect, state().transform().xScaleSquared(), state().transform().yScaleSquared())) |
+ imagePaint.setFilterQuality(kLow_SkFilterQuality); |
+ |
if (!imageSource->isVideoElement()) { |
imagePaint.setAntiAlias(shouldDrawImageAntialiased(dstRect)); |
image->draw(c, imagePaint, dstRect, srcRect, DoNotRespectImageOrientation, Image::DoNotClampImageToSourceRect); |