third_party/WebKit/Source/platform/graphics/GraphicsContextTest.cpp - chromium/src.git - Git at Google

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
  *     documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
  * DAMAGE.
  */

 #include "platform/graphics/GraphicsContext.h"

 #include <memory>
 #include "platform/graphics/BitmapImage.h"
 #include "platform/graphics/Path.h"
 #include "platform/graphics/paint/PaintController.h"
 #include "platform/graphics/paint/PaintRecord.h"
 #include "platform/testing/FontTestHelpers.h"
 #include "platform/testing/UnitTestHelpers.h"
 #include "platform/text/TextRun.h"
 #include "platform/wtf/PtrUtil.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "third_party/skia/include/core/SkShader.h"

 namespace blink {

 #define EXPECT_EQ_RECT(a, b)       \
   EXPECT_EQ(a.x(), b.x());         \
   EXPECT_EQ(a.y(), b.y());         \
   EXPECT_EQ(a.width(), b.width()); \
   EXPECT_EQ(a.height(), b.height());

 #define EXPECT_OPAQUE_PIXELS_IN_RECT(bitmap, opaqueRect)         \
   {                                                              \
     for (int y = opaqueRect.Y(); y < opaqueRect.MaxY(); ++y)     \
       for (int x = opaqueRect.X(); x < opaqueRect.MaxX(); ++x) { \
         int alpha = *bitmap.getAddr32(x, y) >> 24;               \
         EXPECT_EQ(255, alpha);                                   \
       }                                                          \
   }

 #define EXPECT_OPAQUE_PIXELS_ONLY_IN_RECT(bitmap, opaqueRect) \
   {                                                           \
     for (int y = 0; y < bitmap.height(); ++y)                 \
       for (int x = 0; x < bitmap.width(); ++x) {              \
         int alpha = *bitmap.getAddr32(x, y) >> 24;            \
         bool opaque = opaqueRect.Contains(x, y);              \
         EXPECT_EQ(opaque, alpha == 255);                      \
       }                                                       \
   }

 TEST(GraphicsContextTest, Recording) {
   SkBitmap bitmap;
   bitmap.allocN32Pixels(100, 100);
   bitmap.eraseColor(0);
   SkiaPaintCanvas canvas(bitmap);

   std::unique_ptr<PaintController> paint_controller = PaintController::Create();
   GraphicsContext context(*paint_controller);

   Color opaque(1.0f, 0.0f, 0.0f, 1.0f);
   FloatRect bounds(0, 0, 100, 100);

   context.BeginRecording(bounds);
   context.FillRect(FloatRect(0, 0, 50, 50), opaque, SkBlendMode::kSrcOver);
   canvas.drawPicture(context.EndRecording());
   EXPECT_OPAQUE_PIXELS_ONLY_IN_RECT(bitmap, IntRect(0, 0, 50, 50))

   context.BeginRecording(bounds);
   context.FillRect(FloatRect(0, 0, 100, 100), opaque, SkBlendMode::kSrcOver);
   // Make sure the opaque region was unaffected by the rect drawn during
   // recording.
   EXPECT_OPAQUE_PIXELS_ONLY_IN_RECT(bitmap, IntRect(0, 0, 50, 50))

   canvas.drawPicture(context.EndRecording());
   EXPECT_OPAQUE_PIXELS_ONLY_IN_RECT(bitmap, IntRect(0, 0, 100, 100))
 }

 TEST(GraphicsContextTest, UnboundedDrawsAreClipped) {
   SkBitmap bitmap;
   bitmap.allocN32Pixels(400, 400);
   bitmap.eraseColor(0);
   SkiaPaintCanvas canvas(bitmap);

   Color opaque(1.0f, 0.0f, 0.0f, 1.0f);
   Color alpha(0.0f, 0.0f, 0.0f, 0.0f);
   FloatRect bounds(0, 0, 100, 100);

   std::unique_ptr<PaintController> paint_controller = PaintController::Create();
   GraphicsContext context(*paint_controller);
   context.BeginRecording(bounds);

   context.SetShouldAntialias(false);
   context.SetMiterLimit(1);
   context.SetStrokeThickness(5);
   context.SetLineCap(kSquareCap);
   context.SetStrokeStyle(kSolidStroke);

   // Make skia unable to compute fast bounds for our paths.
   DashArray dash_array;
   dash_array.push_back(1);
   dash_array.push_back(0);
   context.SetLineDash(dash_array, 0);

   // Make the device opaque in 10,10 40x40.
   context.FillRect(FloatRect(10, 10, 40, 40), opaque, SkBlendMode::kSrcOver);
   canvas.drawPicture(context.EndRecording());
   EXPECT_OPAQUE_PIXELS_ONLY_IN_RECT(bitmap, IntRect(10, 10, 40, 40));

   context.BeginRecording(bounds);
   // Clip to the left edge of the opaque area.
   context.Clip(IntRect(10, 10, 10, 40));

   // Draw a path that gets clipped. This should destroy the opaque area, but
   // only inside the clip.
   Path path;
   path.MoveTo(FloatPoint(10, 10));
   path.AddLineTo(FloatPoint(40, 40));
   PaintFlags flags;
   flags.setColor(alpha.Rgb());
   flags.setBlendMode(SkBlendMode::kSrcOut);
   context.DrawPath(path.GetSkPath(), flags);

   canvas.drawPicture(context.EndRecording());
   EXPECT_OPAQUE_PIXELS_IN_RECT(bitmap, IntRect(20, 10, 30, 40));
 }

 class GraphicsContextHighConstrastTest : public ::testing::Test {
  protected:
   void SetUp() override {
     bitmap_.allocN32Pixels(4, 1);
     bitmap_.eraseColor(0);
     canvas_ = WTF::WrapUnique(new SkiaPaintCanvas(bitmap_));
     paint_controller_ = PaintController::Create();
     context_ = WTF::WrapUnique(new GraphicsContext(*paint_controller_));
     context_->BeginRecording(FloatRect(0, 0, 4, 1));
   }

   void DrawColorsToContext() {
     Color black(0.0f, 0.0f, 0.0f, 1.0f);
     Color white(1.0f, 1.0f, 1.0f, 1.0f);
     Color red(1.0f, 0.0f, 0.0f, 1.0f);
     Color gray(0.5f, 0.5f, 0.5f, 1.0f);
     context_->FillRect(FloatRect(0, 0, 1, 1), black);
     context_->FillRect(FloatRect(1, 0, 1, 1), white);
     context_->FillRect(FloatRect(2, 0, 1, 1), red);
     context_->FillRect(FloatRect(3, 0, 1, 1), gray);
     // Capture the result in the bitmap.
     canvas_->drawPicture(context_->EndRecording());
   }

   SkBitmap bitmap_;
   std::unique_ptr<SkiaPaintCanvas> canvas_;
   std::unique_ptr<PaintController> paint_controller_;
   std::unique_ptr<GraphicsContext> context_;
 };

 // This is just a baseline test, compare against the other variants
 // of the test below, where high contrast mode is enabled.
 TEST_F(GraphicsContextHighConstrastTest, NoHighContrast) {
   DrawColorsToContext();

   EXPECT_EQ(0xff000000, *bitmap_.getAddr32(0, 0));
   EXPECT_EQ(0xffffffff, *bitmap_.getAddr32(1, 0));
   EXPECT_EQ(0xffff0000, *bitmap_.getAddr32(2, 0));
   EXPECT_EQ(0xff808080, *bitmap_.getAddr32(3, 0));
 }

 TEST_F(GraphicsContextHighConstrastTest, HighContrastOff) {
   HighContrastSettings settings;
   settings.mode = HighContrastMode::kOff;
   settings.grayscale = false;
   settings.contrast = 0;
   context_->SetHighContrast(settings);

   DrawColorsToContext();

   EXPECT_EQ(0xff000000, *bitmap_.getAddr32(0, 0));
   EXPECT_EQ(0xffffffff, *bitmap_.getAddr32(1, 0));
   EXPECT_EQ(0xffff0000, *bitmap_.getAddr32(2, 0));
   EXPECT_EQ(0xff808080, *bitmap_.getAddr32(3, 0));
 }

 // Simple invert for testing. Each color component |c|
 // is replaced with |255 - c| for easy testing.
 TEST_F(GraphicsContextHighConstrastTest, SimpleInvertForTesting) {
   HighContrastSettings settings;
   settings.mode = HighContrastMode::kSimpleInvertForTesting;
   settings.grayscale = false;
   settings.contrast = 0;
   context_->SetHighContrast(settings);

   DrawColorsToContext();

   EXPECT_EQ(0xffffffff, *bitmap_.getAddr32(0, 0));
   EXPECT_EQ(0xff000000, *bitmap_.getAddr32(1, 0));
   EXPECT_EQ(0xff00ffff, *bitmap_.getAddr32(2, 0));
   EXPECT_EQ(0xff7f7f7f, *bitmap_.getAddr32(3, 0));
 }

 // Invert brightness (with gamma correction).
 TEST_F(GraphicsContextHighConstrastTest, InvertBrightness) {
   HighContrastSettings settings;
   settings.mode = HighContrastMode::kInvertBrightness;
   settings.grayscale = false;
   settings.contrast = 0;
   context_->SetHighContrast(settings);

   DrawColorsToContext();

   EXPECT_EQ(0xffffffff, *bitmap_.getAddr32(0, 0));
   EXPECT_EQ(0xff000000, *bitmap_.getAddr32(1, 0));
   EXPECT_EQ(0xff00ffff, *bitmap_.getAddr32(2, 0));
   EXPECT_EQ(0xffdddddd, *bitmap_.getAddr32(3, 0));
 }

 // Invert lightness (in HSL space).
 TEST_F(GraphicsContextHighConstrastTest, InvertLightness) {
   HighContrastSettings settings;
   settings.mode = HighContrastMode::kInvertLightness;
   settings.grayscale = false;
   settings.contrast = 0;
   context_->SetHighContrast(settings);

   DrawColorsToContext();

   EXPECT_EQ(0xffffffff, *bitmap_.getAddr32(0, 0));
   EXPECT_EQ(0xff000000, *bitmap_.getAddr32(1, 0));
   EXPECT_EQ(0xffff0000, *bitmap_.getAddr32(2, 0));
   EXPECT_EQ(0xffdddddd, *bitmap_.getAddr32(3, 0));
 }

 // Invert lightness plus grayscale.
 TEST_F(GraphicsContextHighConstrastTest, InvertLightnessPlusGrayscale) {
   HighContrastSettings settings;
   settings.mode = HighContrastMode::kInvertLightness;
   settings.grayscale = true;
   settings.contrast = 0;
   context_->SetHighContrast(settings);

   DrawColorsToContext();

   EXPECT_EQ(0xffffffff, *bitmap_.getAddr32(0, 0));
   EXPECT_EQ(0xff000000, *bitmap_.getAddr32(1, 0));
   EXPECT_EQ(0xffe2e2e2, *bitmap_.getAddr32(2, 0));
   EXPECT_EQ(0xffdddddd, *bitmap_.getAddr32(3, 0));
 }

 TEST_F(GraphicsContextHighConstrastTest, InvertLightnessPlusContrast) {
   HighContrastSettings settings;
   settings.mode = HighContrastMode::kInvertLightness;
   settings.grayscale = false;
   settings.contrast = 0.2;
   context_->SetHighContrast(settings);

   DrawColorsToContext();

   EXPECT_EQ(0xffffffff, *bitmap_.getAddr32(0, 0));
   EXPECT_EQ(0xff000000, *bitmap_.getAddr32(1, 0));
   EXPECT_EQ(0xffff0000, *bitmap_.getAddr32(2, 0));
   EXPECT_EQ(0xffeeeeee, *bitmap_.getAddr32(3, 0));
 }

 }  // namespace blink
	/*
	* Copyright (C) 2012 Google Inc. All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	*
	* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND
	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	* ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE
	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
	* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
	* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
	* DAMAGE.
	*/

	#include "platform/graphics/GraphicsContext.h"

	#include <memory>
	#include "platform/graphics/BitmapImage.h"
	#include "platform/graphics/Path.h"
	#include "platform/graphics/paint/PaintController.h"
	#include "platform/graphics/paint/PaintRecord.h"
	#include "platform/testing/FontTestHelpers.h"
	#include "platform/testing/UnitTestHelpers.h"
	#include "platform/text/TextRun.h"
	#include "platform/wtf/PtrUtil.h"
	#include "testing/gtest/include/gtest/gtest.h"
	#include "third_party/skia/include/core/SkBitmap.h"
	#include "third_party/skia/include/core/SkCanvas.h"
	#include "third_party/skia/include/core/SkShader.h"

	namespace blink {

	#define EXPECT_EQ_RECT(a, b) \
	EXPECT_EQ(a.x(), b.x()); \
	EXPECT_EQ(a.y(), b.y()); \
	EXPECT_EQ(a.width(), b.width()); \
	EXPECT_EQ(a.height(), b.height());

	#define EXPECT_OPAQUE_PIXELS_IN_RECT(bitmap, opaqueRect) \
	{ \
	for (int y = opaqueRect.Y(); y < opaqueRect.MaxY(); ++y) \
	for (int x = opaqueRect.X(); x < opaqueRect.MaxX(); ++x) { \
	int alpha = *bitmap.getAddr32(x, y) >> 24; \
	EXPECT_EQ(255, alpha); \
	} \
	}

	#define EXPECT_OPAQUE_PIXELS_ONLY_IN_RECT(bitmap, opaqueRect) \
	{ \
	for (int y = 0; y < bitmap.height(); ++y) \
	for (int x = 0; x < bitmap.width(); ++x) { \
	int alpha = *bitmap.getAddr32(x, y) >> 24; \
	bool opaque = opaqueRect.Contains(x, y); \
	EXPECT_EQ(opaque, alpha == 255); \
	} \
	}

	TEST(GraphicsContextTest, Recording) {
	SkBitmap bitmap;
	bitmap.allocN32Pixels(100, 100);
	bitmap.eraseColor(0);
	SkiaPaintCanvas canvas(bitmap);

	std::unique_ptr<PaintController> paint_controller = PaintController::Create();
	GraphicsContext context(*paint_controller);

	Color opaque(1.0f, 0.0f, 0.0f, 1.0f);
	FloatRect bounds(0, 0, 100, 100);

	context.BeginRecording(bounds);
	context.FillRect(FloatRect(0, 0, 50, 50), opaque, SkBlendMode::kSrcOver);
	canvas.drawPicture(context.EndRecording());
	EXPECT_OPAQUE_PIXELS_ONLY_IN_RECT(bitmap, IntRect(0, 0, 50, 50))

	context.BeginRecording(bounds);
	context.FillRect(FloatRect(0, 0, 100, 100), opaque, SkBlendMode::kSrcOver);
	// Make sure the opaque region was unaffected by the rect drawn during
	// recording.
	EXPECT_OPAQUE_PIXELS_ONLY_IN_RECT(bitmap, IntRect(0, 0, 50, 50))

	canvas.drawPicture(context.EndRecording());
	EXPECT_OPAQUE_PIXELS_ONLY_IN_RECT(bitmap, IntRect(0, 0, 100, 100))
	}

	TEST(GraphicsContextTest, UnboundedDrawsAreClipped) {
	SkBitmap bitmap;
	bitmap.allocN32Pixels(400, 400);
	bitmap.eraseColor(0);
	SkiaPaintCanvas canvas(bitmap);

	Color opaque(1.0f, 0.0f, 0.0f, 1.0f);
	Color alpha(0.0f, 0.0f, 0.0f, 0.0f);
	FloatRect bounds(0, 0, 100, 100);

	std::unique_ptr<PaintController> paint_controller = PaintController::Create();
	GraphicsContext context(*paint_controller);
	context.BeginRecording(bounds);

	context.SetShouldAntialias(false);
	context.SetMiterLimit(1);
	context.SetStrokeThickness(5);
	context.SetLineCap(kSquareCap);
	context.SetStrokeStyle(kSolidStroke);

	// Make skia unable to compute fast bounds for our paths.
	DashArray dash_array;
	dash_array.push_back(1);
	dash_array.push_back(0);
	context.SetLineDash(dash_array, 0);

	// Make the device opaque in 10,10 40x40.
	context.FillRect(FloatRect(10, 10, 40, 40), opaque, SkBlendMode::kSrcOver);
	canvas.drawPicture(context.EndRecording());
	EXPECT_OPAQUE_PIXELS_ONLY_IN_RECT(bitmap, IntRect(10, 10, 40, 40));

	context.BeginRecording(bounds);
	// Clip to the left edge of the opaque area.
	context.Clip(IntRect(10, 10, 10, 40));

	// Draw a path that gets clipped. This should destroy the opaque area, but
	// only inside the clip.
	Path path;
	path.MoveTo(FloatPoint(10, 10));
	path.AddLineTo(FloatPoint(40, 40));
	PaintFlags flags;
	flags.setColor(alpha.Rgb());
	flags.setBlendMode(SkBlendMode::kSrcOut);
	context.DrawPath(path.GetSkPath(), flags);

	canvas.drawPicture(context.EndRecording());
	EXPECT_OPAQUE_PIXELS_IN_RECT(bitmap, IntRect(20, 10, 30, 40));
	}

	class GraphicsContextHighConstrastTest : public ::testing::Test {
	protected:
	void SetUp() override {
	bitmap_.allocN32Pixels(4, 1);
	bitmap_.eraseColor(0);
	canvas_ = WTF::WrapUnique(new SkiaPaintCanvas(bitmap_));
	paint_controller_ = PaintController::Create();
	context_ = WTF::WrapUnique(new GraphicsContext(*paint_controller_));
	context_->BeginRecording(FloatRect(0, 0, 4, 1));
	}

	void DrawColorsToContext() {
	Color black(0.0f, 0.0f, 0.0f, 1.0f);
	Color white(1.0f, 1.0f, 1.0f, 1.0f);
	Color red(1.0f, 0.0f, 0.0f, 1.0f);
	Color gray(0.5f, 0.5f, 0.5f, 1.0f);
	context_->FillRect(FloatRect(0, 0, 1, 1), black);
	context_->FillRect(FloatRect(1, 0, 1, 1), white);
	context_->FillRect(FloatRect(2, 0, 1, 1), red);
	context_->FillRect(FloatRect(3, 0, 1, 1), gray);
	// Capture the result in the bitmap.
	canvas_->drawPicture(context_->EndRecording());
	}

	SkBitmap bitmap_;
	std::unique_ptr<SkiaPaintCanvas> canvas_;
	std::unique_ptr<PaintController> paint_controller_;
	std::unique_ptr<GraphicsContext> context_;
	};

	// This is just a baseline test, compare against the other variants
	// of the test below, where high contrast mode is enabled.
	TEST_F(GraphicsContextHighConstrastTest, NoHighContrast) {
	DrawColorsToContext();

	EXPECT_EQ(0xff000000, *bitmap_.getAddr32(0, 0));
	EXPECT_EQ(0xffffffff, *bitmap_.getAddr32(1, 0));
	EXPECT_EQ(0xffff0000, *bitmap_.getAddr32(2, 0));
	EXPECT_EQ(0xff808080, *bitmap_.getAddr32(3, 0));
	}

	TEST_F(GraphicsContextHighConstrastTest, HighContrastOff) {
	HighContrastSettings settings;
	settings.mode = HighContrastMode::kOff;
	settings.grayscale = false;
	settings.contrast = 0;
	context_->SetHighContrast(settings);

	DrawColorsToContext();

	EXPECT_EQ(0xff000000, *bitmap_.getAddr32(0, 0));
	EXPECT_EQ(0xffffffff, *bitmap_.getAddr32(1, 0));
	EXPECT_EQ(0xffff0000, *bitmap_.getAddr32(2, 0));
	EXPECT_EQ(0xff808080, *bitmap_.getAddr32(3, 0));
	}

	// Simple invert for testing. Each color component \|c\|
	// is replaced with \|255 - c\| for easy testing.
	TEST_F(GraphicsContextHighConstrastTest, SimpleInvertForTesting) {
	HighContrastSettings settings;
	settings.mode = HighContrastMode::kSimpleInvertForTesting;
	settings.grayscale = false;
	settings.contrast = 0;
	context_->SetHighContrast(settings);

	DrawColorsToContext();

	EXPECT_EQ(0xffffffff, *bitmap_.getAddr32(0, 0));
	EXPECT_EQ(0xff000000, *bitmap_.getAddr32(1, 0));
	EXPECT_EQ(0xff00ffff, *bitmap_.getAddr32(2, 0));
	EXPECT_EQ(0xff7f7f7f, *bitmap_.getAddr32(3, 0));
	}

	// Invert brightness (with gamma correction).
	TEST_F(GraphicsContextHighConstrastTest, InvertBrightness) {
	HighContrastSettings settings;
	settings.mode = HighContrastMode::kInvertBrightness;
	settings.grayscale = false;
	settings.contrast = 0;
	context_->SetHighContrast(settings);

	DrawColorsToContext();

	EXPECT_EQ(0xffffffff, *bitmap_.getAddr32(0, 0));
	EXPECT_EQ(0xff000000, *bitmap_.getAddr32(1, 0));
	EXPECT_EQ(0xff00ffff, *bitmap_.getAddr32(2, 0));
	EXPECT_EQ(0xffdddddd, *bitmap_.getAddr32(3, 0));
	}

	// Invert lightness (in HSL space).
	TEST_F(GraphicsContextHighConstrastTest, InvertLightness) {
	HighContrastSettings settings;
	settings.mode = HighContrastMode::kInvertLightness;
	settings.grayscale = false;
	settings.contrast = 0;
	context_->SetHighContrast(settings);

	DrawColorsToContext();

	EXPECT_EQ(0xffffffff, *bitmap_.getAddr32(0, 0));
	EXPECT_EQ(0xff000000, *bitmap_.getAddr32(1, 0));
	EXPECT_EQ(0xffff0000, *bitmap_.getAddr32(2, 0));
	EXPECT_EQ(0xffdddddd, *bitmap_.getAddr32(3, 0));
	}

	// Invert lightness plus grayscale.
	TEST_F(GraphicsContextHighConstrastTest, InvertLightnessPlusGrayscale) {
	HighContrastSettings settings;
	settings.mode = HighContrastMode::kInvertLightness;
	settings.grayscale = true;
	settings.contrast = 0;
	context_->SetHighContrast(settings);

	DrawColorsToContext();

	EXPECT_EQ(0xffffffff, *bitmap_.getAddr32(0, 0));
	EXPECT_EQ(0xff000000, *bitmap_.getAddr32(1, 0));
	EXPECT_EQ(0xffe2e2e2, *bitmap_.getAddr32(2, 0));
	EXPECT_EQ(0xffdddddd, *bitmap_.getAddr32(3, 0));
	}

	TEST_F(GraphicsContextHighConstrastTest, InvertLightnessPlusContrast) {
	HighContrastSettings settings;
	settings.mode = HighContrastMode::kInvertLightness;
	settings.grayscale = false;
	settings.contrast = 0.2;
	context_->SetHighContrast(settings);

	DrawColorsToContext();

	EXPECT_EQ(0xffffffff, *bitmap_.getAddr32(0, 0));
	EXPECT_EQ(0xff000000, *bitmap_.getAddr32(1, 0));
	EXPECT_EQ(0xffff0000, *bitmap_.getAddr32(2, 0));
	EXPECT_EQ(0xffeeeeee, *bitmap_.getAddr32(3, 0));
	}

	} // namespace blink