Change filter quality when scaling-down in drawImage

third_party/WebKit/Source/core/layout/ImageQualityControllerTest.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/layout/ImageQualityController.h"
 
 #include "core/layout/LayoutImage.h"
 #include "core/layout/LayoutTestHelper.h"
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/paint/PaintController.h"
@@ skipping 36 matching lines @@
 }
 
 #if !USE(LOW_QUALITY_IMAGE_INTERPOLATION)
 
 class TestImageAnimated : public Image {
 public:
     bool maybeAnimated() override { return true; }
     bool currentFrameKnownToBeOpaque(MetadataMode = UseCurrentMetadata) override { return false; }
     IntSize size() const override { return IntSize(); }
     void destroyDecodedData() override { }
-    void draw(SkCanvas*, const SkPaint&, const FloatRect& dstRect, const FloatRect& srcRect, RespectImageOrientationEnum, ImageClampingMode) override { }
+    void draw(SkCanvas*, const SkPaint&, const FloatRect& dstRect, const FloatRect& srcRect, bool imageSmoothingEnabled, RespectImageOrientationEnum, ImageClampingMode) override { }
     PassRefPtr<SkImage> imageForCurrentFrame() override { return nullptr; }
 };
 
 TEST_F(ImageQualityControllerTest, ImageMaybeAnimated)
 {
     setBodyInnerHTML("<img src='myimage'></img>");
     LayoutImage* img = toLayoutImage(document().body()->firstChild()->layoutObject());
 
     RefPtr<TestImageAnimated> testImage = adoptRef(new TestImageAnimated);
     EXPECT_EQ(InterpolationMedium, controller()->chooseInterpolationQuality(*img, testImage.get(), nullptr, LayoutSize()));
 }
 
 class TestImageWithContrast : public Image {
 public:
     bool maybeAnimated() override { return true; }
     bool currentFrameKnownToBeOpaque(MetadataMode = UseCurrentMetadata) override { return false; }
     IntSize size() const override { return IntSize(); }
     void destroyDecodedData() override { }
-    void draw(SkCanvas*, const SkPaint&, const FloatRect& dstRect, const FloatRect& srcRect, RespectImageOrientationEnum, ImageClampingMode) override { }
+    void draw(SkCanvas*, const SkPaint&, const FloatRect& dstRect, const FloatRect& srcRect, bool imageSmoothingEnabled, RespectImageOrientationEnum, ImageClampingMode) override { }
 
     bool isBitmapImage() const override { return true; }
     PassRefPtr<SkImage> imageForCurrentFrame() override { return nullptr; }
 };
 
 TEST_F(ImageQualityControllerTest, LowQualityFilterForContrast)
 {
     setBodyInnerHTML("<img src='myimage' style='image-rendering: -webkit-optimize-contrast'></img>");
     LayoutImage* img = toLayoutImage(document().body()->firstChild()->layoutObject());
 
     RefPtr<TestImageWithContrast> testImage = adoptRef(new TestImageWithContrast);
     EXPECT_EQ(InterpolationLow, controller()->chooseInterpolationQuality(*img, testImage.get(), testImage.get(), LayoutSize()));
 }
 
 class TestImageLowQuality : public Image {
 public:
     bool maybeAnimated() override { return true; }
     bool currentFrameKnownToBeOpaque(MetadataMode = UseCurrentMetadata) override { return false; }
     IntSize size() const override { return IntSize(1, 1); }
     void destroyDecodedData() override { }
-    void draw(SkCanvas*, const SkPaint&, const FloatRect& dstRect, const FloatRect& srcRect, RespectImageOrientationEnum, ImageClampingMode) override { }
+    void draw(SkCanvas*, const SkPaint&, const FloatRect& dstRect, const FloatRect& srcRect, bool imageSmoothingEnabled, RespectImageOrientationEnum, ImageClampingMode) override { }
 
     bool isBitmapImage() const override { return true; }
     PassRefPtr<SkImage> imageForCurrentFrame() override { return nullptr; }
 };
 
 TEST_F(ImageQualityControllerTest, MediumQualityFilterForUnscaledImage)
 {
     setBodyInnerHTML("<img src='myimage'></img>");
     LayoutImage* img = toLayoutImage(document().body()->firstChild()->layoutObject());
 
@@ skipping 160 matching lines @@
     // This animation is far enough in the future to make the timer restart, since it is half over.
     nextTime = 0.1 + ImageQualityController::cTimerRestartThreshold + 0.01;
     EXPECT_EQ(true, controller()->shouldPaintAtLowQuality(*img, testImage.get(), testImage.get(), LayoutSize(4, 4), nextTime));
     // Now the timer has restarted, leading to a larger fire interval.
     EXPECT_EQ(ImageQualityController::cLowQualityTimeThreshold, mockTimer->nextFireInterval());
 }
 
 #endif
 
 } // namespace blink