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// 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"
#include "platform/scheduler/test/fake_web_task_runner.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "wtf/PtrUtil.h"
#include <memory>
namespace blink {
class ImageQualityControllerTest : public RenderingTest {
protected:
ImageQualityController* controller() { return m_controller; }
private:
void SetUp() override {
m_controller = ImageQualityController::imageQualityController();
RenderingTest::SetUp();
}
ImageQualityController* m_controller;
};
TEST_F(ImageQualityControllerTest, RegularImage) {
setBodyInnerHTML("<img src='myimage'></img>");
LayoutObject* obj = document().body()->firstChild()->layoutObject();
EXPECT_EQ(InterpolationDefault, controller()->chooseInterpolationQuality(
*obj, nullptr, nullptr, LayoutSize()));
}
TEST_F(ImageQualityControllerTest, ImageRenderingPixelated) {
setBodyInnerHTML(
"<img src='myimage' style='image-rendering: pixelated'></img>");
LayoutObject* obj = document().body()->firstChild()->layoutObject();
EXPECT_EQ(InterpolationNone, controller()->chooseInterpolationQuality(
*obj, nullptr, nullptr, LayoutSize()));
}
#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,
const ColorBehavior&) override {}
sk_sp<SkImage> imageForCurrentFrame(const ColorBehavior&) 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,
const ColorBehavior&) override {}
bool isBitmapImage() const override { return true; }
sk_sp<SkImage> imageForCurrentFrame(const ColorBehavior&) 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,
const ColorBehavior&) override {}
bool isBitmapImage() const override { return true; }
sk_sp<SkImage> imageForCurrentFrame(const ColorBehavior&) override {
return nullptr;
}
};
TEST_F(ImageQualityControllerTest, MediumQualityFilterForUnscaledImage) {
setBodyInnerHTML("<img src='myimage'></img>");
LayoutImage* img =
toLayoutImage(document().body()->firstChild()->layoutObject());
RefPtr<TestImageLowQuality> testImage = adoptRef(new TestImageLowQuality);
EXPECT_EQ(InterpolationMedium,
controller()->chooseInterpolationQuality(
*img, testImage.get(), testImage.get(), LayoutSize(1, 1)));
}
// TODO(alexclarke): Remove this when possible.
class MockTimer : public TaskRunnerTimer<ImageQualityController> {
public:
using TimerFiredFunction =
typename TaskRunnerTimer<ImageQualityController>::TimerFiredFunction;
static std::unique_ptr<MockTimer> create(ImageQualityController* o,
TimerFiredFunction f) {
auto taskRunner = adoptRef(new scheduler::FakeWebTaskRunner);
return WTF::wrapUnique(new MockTimer(std::move(taskRunner), o, f));
}
void fire() {
fired();
stop();
}
void setTime(double newTime) { m_taskRunner->setTime(newTime); }
private:
MockTimer(RefPtr<scheduler::FakeWebTaskRunner> taskRunner,
ImageQualityController* o,
TimerFiredFunction f)
: TaskRunnerTimer(taskRunner, o, f),
m_taskRunner(std::move(taskRunner)) {}
RefPtr<scheduler::FakeWebTaskRunner> m_taskRunner;
DISALLOW_COPY_AND_ASSIGN(MockTimer);
};
TEST_F(ImageQualityControllerTest, LowQualityFilterForResizingImage) {
MockTimer* mockTimer =
MockTimer::create(controller(),
&ImageQualityController::highQualityRepaintTimerFired)
.release();
controller()->setTimer(WTF::wrapUnique(mockTimer));
setBodyInnerHTML("<img src='myimage'></img>");
LayoutImage* img =
toLayoutImage(document().body()->firstChild()->layoutObject());
RefPtr<TestImageLowQuality> testImage = adoptRef(new TestImageLowQuality);
std::unique_ptr<PaintController> paintController = PaintController::create();
GraphicsContext context(*paintController);
// Paint once. This will kick off a timer to see if we resize it during that
// timer's execution.
EXPECT_EQ(InterpolationMedium,
controller()->chooseInterpolationQuality(
*img, testImage.get(), testImage.get(), LayoutSize(2, 2)));
// Go into low-quality mode now that the size changed.
EXPECT_EQ(InterpolationLow,
controller()->chooseInterpolationQuality(
*img, testImage.get(), testImage.get(), LayoutSize(3, 3)));
// Stay in low-quality mode since the size changed again.
EXPECT_EQ(InterpolationLow,
controller()->chooseInterpolationQuality(
*img, testImage.get(), testImage.get(), LayoutSize(4, 4)));
mockTimer->fire();
// The timer fired before painting at another size, so this doesn't count as
// animation. Therefore not painting at low quality.
EXPECT_EQ(InterpolationMedium,
controller()->chooseInterpolationQuality(
*img, testImage.get(), testImage.get(), LayoutSize(4, 4)));
}
TEST_F(ImageQualityControllerTest,
MediumQualityFilterForNotAnimatedWhileAnotherAnimates) {
MockTimer* mockTimer =
MockTimer::create(controller(),
&ImageQualityController::highQualityRepaintTimerFired)
.release();
controller()->setTimer(WTF::wrapUnique(mockTimer));
setBodyInnerHTML(
"<img id='myAnimatingImage' src='myimage'></img> <img "
"id='myNonAnimatingImage' src='myimage2'></img>");
LayoutImage* animatingImage = toLayoutImage(
document().getElementById("myAnimatingImage")->layoutObject());
LayoutImage* nonAnimatingImage = toLayoutImage(
document().getElementById("myNonAnimatingImage")->layoutObject());
RefPtr<TestImageLowQuality> testImage = adoptRef(new TestImageLowQuality);
std::unique_ptr<PaintController> paintController = PaintController::create();
GraphicsContext context(*paintController);
// Paint once. This will kick off a timer to see if we resize it during that
// timer's execution.
EXPECT_EQ(InterpolationMedium, controller()->chooseInterpolationQuality(
*animatingImage, testImage.get(),
testImage.get(), LayoutSize(2, 2)));
// Go into low-quality mode now that the size changed.
EXPECT_EQ(InterpolationLow, controller()->chooseInterpolationQuality(
*animatingImage, testImage.get(),
testImage.get(), LayoutSize(3, 3)));
// The non-animating image receives a medium-quality filter, even though the
// other one is animating.
EXPECT_EQ(InterpolationMedium, controller()->chooseInterpolationQuality(
*nonAnimatingImage, testImage.get(),
testImage.get(), LayoutSize(4, 4)));
// Now the second image has animated, so it also gets painted with a
// low-quality filter.
EXPECT_EQ(InterpolationLow, controller()->chooseInterpolationQuality(
*nonAnimatingImage, testImage.get(),
testImage.get(), LayoutSize(3, 3)));
mockTimer->fire();
// The timer fired before painting at another size, so this doesn't count as
// animation. Therefore not painting at low quality for any image.
EXPECT_EQ(InterpolationMedium, controller()->chooseInterpolationQuality(
*animatingImage, testImage.get(),
testImage.get(), LayoutSize(4, 4)));
EXPECT_EQ(InterpolationMedium, controller()->chooseInterpolationQuality(
*nonAnimatingImage, testImage.get(),
testImage.get(), LayoutSize(4, 4)));
}
TEST_F(ImageQualityControllerTest,
DontKickTheAnimationTimerWhenPaintingAtTheSameSize) {
MockTimer* mockTimer =
MockTimer::create(controller(),
&ImageQualityController::highQualityRepaintTimerFired)
.release();
controller()->setTimer(WTF::wrapUnique(mockTimer));
setBodyInnerHTML("<img src='myimage'></img>");
LayoutImage* img =
toLayoutImage(document().body()->firstChild()->layoutObject());
RefPtr<TestImageLowQuality> testImage = adoptRef(new TestImageLowQuality);
// Paint once. This will kick off a timer to see if we resize it during that
// timer's execution.
EXPECT_EQ(InterpolationMedium,
controller()->chooseInterpolationQuality(
*img, testImage.get(), testImage.get(), LayoutSize(2, 2)));
// Go into low-quality mode now that the size changed.
EXPECT_EQ(InterpolationLow,
controller()->chooseInterpolationQuality(
*img, testImage.get(), testImage.get(), LayoutSize(3, 3)));
// Stay in low-quality mode since the size changed again.
EXPECT_EQ(InterpolationLow,
controller()->chooseInterpolationQuality(
*img, testImage.get(), testImage.get(), LayoutSize(4, 4)));
mockTimer->stop();
EXPECT_FALSE(mockTimer->isActive());
// Painted at the same size, so even though timer is still executing, don't go
// to low quality.
EXPECT_EQ(InterpolationLow,
controller()->chooseInterpolationQuality(
*img, testImage.get(), testImage.get(), LayoutSize(4, 4)));
// Check that the timer was not kicked. It should not have been, since the
// image was painted at the same size as last time.
EXPECT_FALSE(mockTimer->isActive());
}
TEST_F(ImageQualityControllerTest, DontRestartTimerUnlessAdvanced) {
MockTimer* mockTimer =
MockTimer::create(controller(),
&ImageQualityController::highQualityRepaintTimerFired)
.release();
controller()->setTimer(WTF::wrapUnique(mockTimer));
setBodyInnerHTML("<img src='myimage'></img>");
LayoutImage* img =
toLayoutImage(document().body()->firstChild()->layoutObject());
RefPtr<TestImageLowQuality> testImage = adoptRef(new TestImageLowQuality);
// Paint once. This will kick off a timer to see if we resize it during that
// timer's execution.
mockTimer->setTime(0.1);
EXPECT_FALSE(controller()->shouldPaintAtLowQuality(
*img, testImage.get(), testImage.get(), LayoutSize(2, 2), 0.1));
EXPECT_EQ(ImageQualityController::cLowQualityTimeThreshold,
mockTimer->nextFireInterval());
// Go into low-quality mode now that the size changed.
double nextTime = 0.1 + ImageQualityController::cTimerRestartThreshold / 2.0;
mockTimer->setTime(nextTime);
EXPECT_EQ(true, controller()->shouldPaintAtLowQuality(
*img, testImage.get(), testImage.get(), LayoutSize(3, 3),
nextTime));
// The fire interval has decreased, because we have not restarted the timer.
EXPECT_EQ(ImageQualityController::cLowQualityTimeThreshold -
ImageQualityController::cTimerRestartThreshold / 2.0,
mockTimer->nextFireInterval());
// 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
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