cc/playback/display_list_raster_source_unittest.cc - chromium/src - Git at Google

 // Copyright 2013 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 "base/memory/scoped_ptr.h"
 #include "cc/playback/display_list_raster_source.h"
 #include "cc/test/fake_display_list_recording_source.h"
 #include "cc/test/skia_common.h"
 #include "skia/ext/refptr.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkPixelRef.h"
 #include "third_party/skia/include/core/SkShader.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/size_conversions.h"

 namespace cc {
 namespace {

 TEST(DisplayListRasterSourceTest, AnalyzeIsSolidUnscaled) {
   gfx::Size layer_bounds(400, 400);

   scoped_ptr<FakeDisplayListRecordingSource> recording_source =
       FakeDisplayListRecordingSource::CreateFilledRecordingSource(layer_bounds);

   SkPaint solid_paint;
   SkColor solid_color = SkColorSetARGB(255, 12, 23, 34);
   solid_paint.setColor(solid_color);

   SkColor non_solid_color = SkColorSetARGB(128, 45, 56, 67);
   SkPaint non_solid_paint;
   non_solid_paint.setColor(non_solid_color);

   recording_source->add_draw_rect_with_paint(gfx::Rect(layer_bounds),
                                              solid_paint);
   recording_source->Rerecord();

   scoped_refptr<DisplayListRasterSource> raster =
       DisplayListRasterSource::CreateFromDisplayListRecordingSource(
           recording_source.get(), false);

   // Ensure everything is solid.
   for (int y = 0; y <= 300; y += 100) {
     for (int x = 0; x <= 300; x += 100) {
       RasterSource::SolidColorAnalysis analysis;
       gfx::Rect rect(x, y, 100, 100);
       raster->PerformSolidColorAnalysis(rect, 1.0, &analysis);
       EXPECT_TRUE(analysis.is_solid_color) << rect.ToString();
       EXPECT_EQ(solid_color, analysis.solid_color) << rect.ToString();
     }
   }

   // Add one non-solid pixel and recreate the raster source.
   recording_source->add_draw_rect_with_paint(gfx::Rect(50, 50, 1, 1),
                                              non_solid_paint);
   recording_source->Rerecord();
   raster = DisplayListRasterSource::CreateFromDisplayListRecordingSource(
       recording_source.get(), false);

   RasterSource::SolidColorAnalysis analysis;
   raster->PerformSolidColorAnalysis(gfx::Rect(0, 0, 100, 100), 1.0, &analysis);
   EXPECT_FALSE(analysis.is_solid_color);

   raster->PerformSolidColorAnalysis(gfx::Rect(100, 0, 100, 100), 1.0,
                                     &analysis);
   EXPECT_TRUE(analysis.is_solid_color);
   EXPECT_EQ(solid_color, analysis.solid_color);

   // Boundaries should be clipped.
   analysis.is_solid_color = false;
   raster->PerformSolidColorAnalysis(gfx::Rect(350, 0, 100, 100), 1.0,
                                     &analysis);
   EXPECT_TRUE(analysis.is_solid_color);
   EXPECT_EQ(solid_color, analysis.solid_color);

   analysis.is_solid_color = false;
   raster->PerformSolidColorAnalysis(gfx::Rect(0, 350, 100, 100), 1.0,
                                     &analysis);
   EXPECT_TRUE(analysis.is_solid_color);
   EXPECT_EQ(solid_color, analysis.solid_color);

   analysis.is_solid_color = false;
   raster->PerformSolidColorAnalysis(gfx::Rect(350, 350, 100, 100), 1.0,
                                     &analysis);
   EXPECT_TRUE(analysis.is_solid_color);
   EXPECT_EQ(solid_color, analysis.solid_color);
 }

 TEST(DisplayListRasterSourceTest, AnalyzeIsSolidScaled) {
   gfx::Size layer_bounds(400, 400);

   scoped_ptr<FakeDisplayListRecordingSource> recording_source =
       FakeDisplayListRecordingSource::CreateFilledRecordingSource(layer_bounds);

   SkColor solid_color = SkColorSetARGB(255, 12, 23, 34);
   SkPaint solid_paint;
   solid_paint.setColor(solid_color);

   SkColor non_solid_color = SkColorSetARGB(128, 45, 56, 67);
   SkPaint non_solid_paint;
   non_solid_paint.setColor(non_solid_color);

   recording_source->add_draw_rect_with_paint(gfx::Rect(0, 0, 400, 400),
                                              solid_paint);
   recording_source->Rerecord();

   scoped_refptr<DisplayListRasterSource> raster =
       DisplayListRasterSource::CreateFromDisplayListRecordingSource(
           recording_source.get(), false);

   // Ensure everything is solid.
   for (int y = 0; y <= 30; y += 10) {
     for (int x = 0; x <= 30; x += 10) {
       RasterSource::SolidColorAnalysis analysis;
       gfx::Rect rect(x, y, 10, 10);
       raster->PerformSolidColorAnalysis(rect, 0.1f, &analysis);
       EXPECT_TRUE(analysis.is_solid_color) << rect.ToString();
       EXPECT_EQ(analysis.solid_color, solid_color) << rect.ToString();
     }
   }

   // Add one non-solid pixel and recreate the raster source.
   recording_source->add_draw_rect_with_paint(gfx::Rect(50, 50, 1, 1),
                                              non_solid_paint);
   recording_source->Rerecord();
   raster = DisplayListRasterSource::CreateFromDisplayListRecordingSource(
       recording_source.get(), false);

   RasterSource::SolidColorAnalysis analysis;
   raster->PerformSolidColorAnalysis(gfx::Rect(0, 0, 10, 10), 0.1f, &analysis);
   EXPECT_FALSE(analysis.is_solid_color);

   raster->PerformSolidColorAnalysis(gfx::Rect(10, 0, 10, 10), 0.1f, &analysis);
   EXPECT_TRUE(analysis.is_solid_color);
   EXPECT_EQ(analysis.solid_color, solid_color);

   // Boundaries should be clipped.
   analysis.is_solid_color = false;
   raster->PerformSolidColorAnalysis(gfx::Rect(35, 0, 10, 10), 0.1f, &analysis);
   EXPECT_TRUE(analysis.is_solid_color);
   EXPECT_EQ(analysis.solid_color, solid_color);

   analysis.is_solid_color = false;
   raster->PerformSolidColorAnalysis(gfx::Rect(0, 35, 10, 10), 0.1f, &analysis);
   EXPECT_TRUE(analysis.is_solid_color);
   EXPECT_EQ(analysis.solid_color, solid_color);

   analysis.is_solid_color = false;
   raster->PerformSolidColorAnalysis(gfx::Rect(35, 35, 10, 10), 0.1f, &analysis);
   EXPECT_TRUE(analysis.is_solid_color);
   EXPECT_EQ(analysis.solid_color, solid_color);
 }

 TEST(DisplayListRasterSourceTest, AnalyzeIsSolidEmpty) {
   gfx::Size layer_bounds(400, 400);

   scoped_ptr<FakeDisplayListRecordingSource> recording_source =
       FakeDisplayListRecordingSource::CreateFilledRecordingSource(layer_bounds);
   recording_source->Rerecord();

   scoped_refptr<DisplayListRasterSource> raster =
       DisplayListRasterSource::CreateFromDisplayListRecordingSource(
           recording_source.get(), false);
   RasterSource::SolidColorAnalysis analysis;
   EXPECT_FALSE(analysis.is_solid_color);

   raster->PerformSolidColorAnalysis(gfx::Rect(0, 0, 400, 400), 1.f, &analysis);

   EXPECT_TRUE(analysis.is_solid_color);
   EXPECT_EQ(analysis.solid_color, SkColorSetARGB(0, 0, 0, 0));
 }

 TEST(DisplayListRasterSourceTest, PixelRefIteratorDiscardableRefsOneTile) {
   gfx::Size layer_bounds(512, 512);

   scoped_ptr<FakeDisplayListRecordingSource> recording_source =
       FakeDisplayListRecordingSource::CreateFilledRecordingSource(layer_bounds);

   SkBitmap discardable_bitmap[2][2];
   CreateBitmap(gfx::Size(32, 32), "discardable", &discardable_bitmap[0][0]);
   CreateBitmap(gfx::Size(32, 32), "discardable", &discardable_bitmap[0][1]);
   CreateBitmap(gfx::Size(32, 32), "discardable", &discardable_bitmap[1][1]);

   // Discardable pixel refs are found in the following cells:
   // |---|---|
   // | x | x |
   // |---|---|
   // |   | x |
   // |---|---|
   recording_source->add_draw_bitmap(discardable_bitmap[0][0], gfx::Point(0, 0));
   recording_source->add_draw_bitmap(discardable_bitmap[0][1],
                                     gfx::Point(260, 0));
   recording_source->add_draw_bitmap(discardable_bitmap[1][1],
                                     gfx::Point(260, 260));
   recording_source->SetGatherPixelRefs(true);
   recording_source->Rerecord();

   scoped_refptr<DisplayListRasterSource> raster =
       DisplayListRasterSource::CreateFromDisplayListRecordingSource(
           recording_source.get(), false);

   // Tile sized iterators. These should find only one pixel ref.
   {
     std::vector<SkPixelRef*> pixel_refs;
     raster->GatherPixelRefs(gfx::Rect(0, 0, 256, 256), 1.0, &pixel_refs);
     EXPECT_EQ(1u, pixel_refs.size());
     EXPECT_EQ(discardable_bitmap[0][0].pixelRef(), pixel_refs[0]);
   }
   {
     std::vector<SkPixelRef*> pixel_refs;
     raster->GatherPixelRefs(gfx::Rect(0, 0, 512, 512), 2.0, &pixel_refs);
     EXPECT_EQ(1u, pixel_refs.size());
     EXPECT_EQ(discardable_bitmap[0][0].pixelRef(), pixel_refs[0]);
   }
   {
     std::vector<SkPixelRef*> pixel_refs;
     raster->GatherPixelRefs(gfx::Rect(0, 0, 128, 128), 0.5, &pixel_refs);
     EXPECT_EQ(1u, pixel_refs.size());
     EXPECT_EQ(discardable_bitmap[0][0].pixelRef(), pixel_refs[0]);
   }
   // Shifted tile sized iterators. These should find only one pixel ref.
   {
     std::vector<SkPixelRef*> pixel_refs;
     raster->GatherPixelRefs(gfx::Rect(260, 260, 256, 256), 1.0, &pixel_refs);
     EXPECT_EQ(1u, pixel_refs.size());
     EXPECT_EQ(discardable_bitmap[1][1].pixelRef(), pixel_refs[0]);
   }
   {
     std::vector<SkPixelRef*> pixel_refs;
     raster->GatherPixelRefs(gfx::Rect(520, 520, 512, 512), 2.0, &pixel_refs);
     EXPECT_EQ(1u, pixel_refs.size());
     EXPECT_EQ(discardable_bitmap[1][1].pixelRef(), pixel_refs[0]);
   }
   {
     std::vector<SkPixelRef*> pixel_refs;
     raster->GatherPixelRefs(gfx::Rect(130, 130, 128, 128), 0.5, &pixel_refs);
     EXPECT_EQ(1u, pixel_refs.size());
     EXPECT_EQ(discardable_bitmap[1][1].pixelRef(), pixel_refs[0]);
   }
   // Ensure there's no discardable pixel refs in the empty cell
   {
     std::vector<SkPixelRef*> pixel_refs;
     raster->GatherPixelRefs(gfx::Rect(0, 256, 256, 256), 1.0, &pixel_refs);
     EXPECT_EQ(0u, pixel_refs.size());
   }
   // Layer sized iterators. These should find three pixel ref.
   {
     std::vector<SkPixelRef*> pixel_refs;
     raster->GatherPixelRefs(gfx::Rect(0, 0, 512, 512), 1.0, &pixel_refs);
     EXPECT_EQ(3u, pixel_refs.size());
     EXPECT_EQ(discardable_bitmap[0][0].pixelRef(), pixel_refs[0]);
     EXPECT_EQ(discardable_bitmap[0][1].pixelRef(), pixel_refs[1]);
     EXPECT_EQ(discardable_bitmap[1][1].pixelRef(), pixel_refs[2]);
   }
   {
     std::vector<SkPixelRef*> pixel_refs;
     raster->GatherPixelRefs(gfx::Rect(0, 0, 1024, 1024), 2.0, &pixel_refs);
     EXPECT_EQ(3u, pixel_refs.size());
     EXPECT_EQ(discardable_bitmap[0][0].pixelRef(), pixel_refs[0]);
     EXPECT_EQ(discardable_bitmap[0][1].pixelRef(), pixel_refs[1]);
     EXPECT_EQ(discardable_bitmap[1][1].pixelRef(), pixel_refs[2]);
   }
   {
     std::vector<SkPixelRef*> pixel_refs;
     raster->GatherPixelRefs(gfx::Rect(0, 0, 256, 256), 0.5, &pixel_refs);
     EXPECT_EQ(3u, pixel_refs.size());
     EXPECT_EQ(discardable_bitmap[0][0].pixelRef(), pixel_refs[0]);
     EXPECT_EQ(discardable_bitmap[0][1].pixelRef(), pixel_refs[1]);
     EXPECT_EQ(discardable_bitmap[1][1].pixelRef(), pixel_refs[2]);
   }
 }

 TEST(DisplayListRasterSourceTest, RasterFullContents) {
   gfx::Size layer_bounds(3, 5);
   float contents_scale = 1.5f;
   float raster_divisions = 2.f;

   scoped_ptr<FakeDisplayListRecordingSource> recording_source =
       FakeDisplayListRecordingSource::CreateFilledRecordingSource(layer_bounds);
   recording_source->SetBackgroundColor(SK_ColorBLACK);
   recording_source->SetClearCanvasWithDebugColor(false);

   // Because the caller sets content opaque, it also promises that it
   // has at least filled in layer_bounds opaquely.
   SkPaint white_paint;
   white_paint.setColor(SK_ColorWHITE);
   recording_source->add_draw_rect_with_paint(gfx::Rect(layer_bounds),
                                              white_paint);
   recording_source->Rerecord();

   scoped_refptr<DisplayListRasterSource> raster =
       DisplayListRasterSource::CreateFromDisplayListRecordingSource(
           recording_source.get(), false);

   gfx::Size content_bounds(
       gfx::ToCeiledSize(gfx::ScaleSize(layer_bounds, contents_scale)));

   // Simulate drawing into different tiles at different offsets.
   int step_x = std::ceil(content_bounds.width() / raster_divisions);
   int step_y = std::ceil(content_bounds.height() / raster_divisions);
   for (int offset_x = 0; offset_x < content_bounds.width();
        offset_x += step_x) {
     for (int offset_y = 0; offset_y < content_bounds.height();
          offset_y += step_y) {
       gfx::Rect content_rect(offset_x, offset_y, step_x, step_y);
       content_rect.Intersect(gfx::Rect(content_bounds));

       // Simulate a canvas rect larger than the content rect.  Every pixel
       // up to one pixel outside the content rect is guaranteed to be opaque.
       // Outside of that is undefined.
       gfx::Rect canvas_rect(content_rect);
       canvas_rect.Inset(0, 0, -1, -1);

       SkBitmap bitmap;
       bitmap.allocN32Pixels(canvas_rect.width(), canvas_rect.height());
       SkCanvas canvas(bitmap);
       canvas.clear(SK_ColorTRANSPARENT);

       raster->PlaybackToCanvas(&canvas, canvas_rect, canvas_rect,
                                contents_scale);

       SkColor* pixels = reinterpret_cast<SkColor*>(bitmap.getPixels());
       int num_pixels = bitmap.width() * bitmap.height();
       bool all_white = true;
       for (int i = 0; i < num_pixels; ++i) {
         EXPECT_EQ(SkColorGetA(pixels[i]), 255u);
         all_white &= (SkColorGetR(pixels[i]) == 255);
         all_white &= (SkColorGetG(pixels[i]) == 255);
         all_white &= (SkColorGetB(pixels[i]) == 255);
       }

       // If the canvas doesn't extend past the edge of the content,
       // it should be entirely white. Otherwise, the edge of the content
       // will be non-white.
       EXPECT_EQ(all_white, gfx::Rect(content_bounds).Contains(canvas_rect));
     }
   }
 }

 TEST(DisplayListRasterSourceTest, RasterPartialContents) {
   gfx::Size layer_bounds(3, 5);
   float contents_scale = 1.5f;

   scoped_ptr<FakeDisplayListRecordingSource> recording_source =
       FakeDisplayListRecordingSource::CreateFilledRecordingSource(layer_bounds);
   recording_source->SetBackgroundColor(SK_ColorGREEN);
   recording_source->SetClearCanvasWithDebugColor(false);

   // First record everything as white.
   SkPaint white_paint;
   white_paint.setColor(SK_ColorWHITE);
   recording_source->add_draw_rect_with_paint(gfx::Rect(layer_bounds),
                                              white_paint);
   recording_source->Rerecord();

   scoped_refptr<DisplayListRasterSource> raster =
       DisplayListRasterSource::CreateFromDisplayListRecordingSource(
           recording_source.get(), false);

   gfx::Size content_bounds(
       gfx::ToCeiledSize(gfx::ScaleSize(layer_bounds, contents_scale)));

   SkBitmap bitmap;
   bitmap.allocN32Pixels(content_bounds.width(), content_bounds.height());
   SkCanvas canvas(bitmap);
   canvas.clear(SK_ColorTRANSPARENT);

   // Playback the full rect which should make everything white.
   gfx::Rect raster_full_rect(content_bounds);
   gfx::Rect playback_rect(content_bounds);
   raster->PlaybackToCanvas(&canvas, raster_full_rect, playback_rect,
                            contents_scale);

   {
     SkColor* pixels = reinterpret_cast<SkColor*>(bitmap.getPixels());
     for (int i = 0; i < bitmap.width(); ++i) {
       for (int j = 0; j < bitmap.height(); ++j) {
         SCOPED_TRACE(i);
         SCOPED_TRACE(j);
         EXPECT_EQ(255u, SkColorGetA(pixels[i + j * bitmap.width()]));
         EXPECT_EQ(255u, SkColorGetR(pixels[i + j * bitmap.width()]));
         EXPECT_EQ(255u, SkColorGetG(pixels[i + j * bitmap.width()]));
         EXPECT_EQ(255u, SkColorGetB(pixels[i + j * bitmap.width()]));
       }
     }
   }

   // Re-record everything as black.
   SkPaint black_paint;
   black_paint.setColor(SK_ColorBLACK);
   recording_source->add_draw_rect_with_paint(gfx::Rect(layer_bounds),
                                              black_paint);
   recording_source->Rerecord();

   // Make a new RasterSource from the new recording.
   raster = DisplayListRasterSource::CreateFromDisplayListRecordingSource(
       recording_source.get(), false);

   // We're going to playback from "everything is black" into a smaller area,
   // that touches the edge pixels of the recording.
   playback_rect.Inset(1, 2, 0, 1);
   raster->PlaybackToCanvas(&canvas, raster_full_rect, playback_rect,
                            contents_scale);

   SkColor* pixels = reinterpret_cast<SkColor*>(bitmap.getPixels());
   int num_black = 0;
   int num_white = 0;
   for (int i = 0; i < bitmap.width(); ++i) {
     for (int j = 0; j < bitmap.height(); ++j) {
       SCOPED_TRACE(j);
       SCOPED_TRACE(i);
       bool expect_black = playback_rect.Contains(i, j);
       if (expect_black) {
         EXPECT_EQ(255u, SkColorGetA(pixels[i + j * bitmap.width()]));
         EXPECT_EQ(0u, SkColorGetR(pixels[i + j * bitmap.width()]));
         EXPECT_EQ(0u, SkColorGetG(pixels[i + j * bitmap.width()]));
         EXPECT_EQ(0u, SkColorGetB(pixels[i + j * bitmap.width()]));
         ++num_black;
       } else {
         EXPECT_EQ(255u, SkColorGetA(pixels[i + j * bitmap.width()]));
         EXPECT_EQ(255u, SkColorGetR(pixels[i + j * bitmap.width()]));
         EXPECT_EQ(255u, SkColorGetG(pixels[i + j * bitmap.width()]));
         EXPECT_EQ(255u, SkColorGetB(pixels[i + j * bitmap.width()]));
         ++num_white;
       }
     }
   }
   EXPECT_GT(num_black, 0);
   EXPECT_GT(num_white, 0);
 }

 TEST(DisplayListRasterSourceTest, RasterContentsTransparent) {
   gfx::Size layer_bounds(5, 3);
   float contents_scale = 0.5f;

   scoped_ptr<FakeDisplayListRecordingSource> recording_source =
       FakeDisplayListRecordingSource::CreateFilledRecordingSource(layer_bounds);
   recording_source->SetBackgroundColor(SK_ColorTRANSPARENT);
   recording_source->SetRequiresClear(true);
   recording_source->SetClearCanvasWithDebugColor(false);
   recording_source->Rerecord();

   scoped_refptr<DisplayListRasterSource> raster =
       DisplayListRasterSource::CreateFromDisplayListRecordingSource(
           recording_source.get(), false);
   gfx::Size content_bounds(
       gfx::ToCeiledSize(gfx::ScaleSize(layer_bounds, contents_scale)));

   gfx::Rect canvas_rect(content_bounds);
   canvas_rect.Inset(0, 0, -1, -1);

   SkBitmap bitmap;
   bitmap.allocN32Pixels(canvas_rect.width(), canvas_rect.height());
   SkCanvas canvas(bitmap);

   raster->PlaybackToCanvas(&canvas, canvas_rect, canvas_rect, contents_scale);

   SkColor* pixels = reinterpret_cast<SkColor*>(bitmap.getPixels());
   int num_pixels = bitmap.width() * bitmap.height();
   for (int i = 0; i < num_pixels; ++i) {
     EXPECT_EQ(SkColorGetA(pixels[i]), 0u);
   }
 }

 }  // namespace
 }  // namespace cc
	// Copyright 2013 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 "base/memory/scoped_ptr.h"
	#include "cc/playback/display_list_raster_source.h"
	#include "cc/test/fake_display_list_recording_source.h"
	#include "cc/test/skia_common.h"
	#include "skia/ext/refptr.h"
	#include "testing/gtest/include/gtest/gtest.h"
	#include "third_party/skia/include/core/SkPixelRef.h"
	#include "third_party/skia/include/core/SkShader.h"
	#include "ui/gfx/geometry/rect.h"
	#include "ui/gfx/geometry/size_conversions.h"

	namespace cc {
	namespace {

	TEST(DisplayListRasterSourceTest, AnalyzeIsSolidUnscaled) {
	gfx::Size layer_bounds(400, 400);

	scoped_ptr<FakeDisplayListRecordingSource> recording_source =
	FakeDisplayListRecordingSource::CreateFilledRecordingSource(layer_bounds);

	SkPaint solid_paint;
	SkColor solid_color = SkColorSetARGB(255, 12, 23, 34);
	solid_paint.setColor(solid_color);

	SkColor non_solid_color = SkColorSetARGB(128, 45, 56, 67);
	SkPaint non_solid_paint;
	non_solid_paint.setColor(non_solid_color);

	recording_source->add_draw_rect_with_paint(gfx::Rect(layer_bounds),
	solid_paint);
	recording_source->Rerecord();

	scoped_refptr<DisplayListRasterSource> raster =
	DisplayListRasterSource::CreateFromDisplayListRecordingSource(
	recording_source.get(), false);

	// Ensure everything is solid.
	for (int y = 0; y <= 300; y += 100) {
	for (int x = 0; x <= 300; x += 100) {
	RasterSource::SolidColorAnalysis analysis;
	gfx::Rect rect(x, y, 100, 100);
	raster->PerformSolidColorAnalysis(rect, 1.0, &analysis);
	EXPECT_TRUE(analysis.is_solid_color) << rect.ToString();
	EXPECT_EQ(solid_color, analysis.solid_color) << rect.ToString();
	}
	}

	// Add one non-solid pixel and recreate the raster source.
	recording_source->add_draw_rect_with_paint(gfx::Rect(50, 50, 1, 1),
	non_solid_paint);
	recording_source->Rerecord();
	raster = DisplayListRasterSource::CreateFromDisplayListRecordingSource(
	recording_source.get(), false);

	RasterSource::SolidColorAnalysis analysis;
	raster->PerformSolidColorAnalysis(gfx::Rect(0, 0, 100, 100), 1.0, &analysis);
	EXPECT_FALSE(analysis.is_solid_color);

	raster->PerformSolidColorAnalysis(gfx::Rect(100, 0, 100, 100), 1.0,
	&analysis);
	EXPECT_TRUE(analysis.is_solid_color);
	EXPECT_EQ(solid_color, analysis.solid_color);

	// Boundaries should be clipped.
	analysis.is_solid_color = false;
	raster->PerformSolidColorAnalysis(gfx::Rect(350, 0, 100, 100), 1.0,
	&analysis);
	EXPECT_TRUE(analysis.is_solid_color);
	EXPECT_EQ(solid_color, analysis.solid_color);

	analysis.is_solid_color = false;
	raster->PerformSolidColorAnalysis(gfx::Rect(0, 350, 100, 100), 1.0,
	&analysis);
	EXPECT_TRUE(analysis.is_solid_color);
	EXPECT_EQ(solid_color, analysis.solid_color);

	analysis.is_solid_color = false;
	raster->PerformSolidColorAnalysis(gfx::Rect(350, 350, 100, 100), 1.0,
	&analysis);
	EXPECT_TRUE(analysis.is_solid_color);
	EXPECT_EQ(solid_color, analysis.solid_color);
	}

	TEST(DisplayListRasterSourceTest, AnalyzeIsSolidScaled) {
	gfx::Size layer_bounds(400, 400);

	scoped_ptr<FakeDisplayListRecordingSource> recording_source =
	FakeDisplayListRecordingSource::CreateFilledRecordingSource(layer_bounds);

	SkColor solid_color = SkColorSetARGB(255, 12, 23, 34);
	SkPaint solid_paint;
	solid_paint.setColor(solid_color);

	SkColor non_solid_color = SkColorSetARGB(128, 45, 56, 67);
	SkPaint non_solid_paint;
	non_solid_paint.setColor(non_solid_color);

	recording_source->add_draw_rect_with_paint(gfx::Rect(0, 0, 400, 400),
	solid_paint);
	recording_source->Rerecord();

	scoped_refptr<DisplayListRasterSource> raster =
	DisplayListRasterSource::CreateFromDisplayListRecordingSource(
	recording_source.get(), false);

	// Ensure everything is solid.
	for (int y = 0; y <= 30; y += 10) {
	for (int x = 0; x <= 30; x += 10) {
	RasterSource::SolidColorAnalysis analysis;
	gfx::Rect rect(x, y, 10, 10);
	raster->PerformSolidColorAnalysis(rect, 0.1f, &analysis);
	EXPECT_TRUE(analysis.is_solid_color) << rect.ToString();
	EXPECT_EQ(analysis.solid_color, solid_color) << rect.ToString();
	}
	}

	// Add one non-solid pixel and recreate the raster source.
	recording_source->add_draw_rect_with_paint(gfx::Rect(50, 50, 1, 1),
	non_solid_paint);
	recording_source->Rerecord();
	raster = DisplayListRasterSource::CreateFromDisplayListRecordingSource(
	recording_source.get(), false);

	RasterSource::SolidColorAnalysis analysis;
	raster->PerformSolidColorAnalysis(gfx::Rect(0, 0, 10, 10), 0.1f, &analysis);
	EXPECT_FALSE(analysis.is_solid_color);

	raster->PerformSolidColorAnalysis(gfx::Rect(10, 0, 10, 10), 0.1f, &analysis);
	EXPECT_TRUE(analysis.is_solid_color);
	EXPECT_EQ(analysis.solid_color, solid_color);

	// Boundaries should be clipped.
	analysis.is_solid_color = false;
	raster->PerformSolidColorAnalysis(gfx::Rect(35, 0, 10, 10), 0.1f, &analysis);
	EXPECT_TRUE(analysis.is_solid_color);
	EXPECT_EQ(analysis.solid_color, solid_color);

	analysis.is_solid_color = false;
	raster->PerformSolidColorAnalysis(gfx::Rect(0, 35, 10, 10), 0.1f, &analysis);
	EXPECT_TRUE(analysis.is_solid_color);
	EXPECT_EQ(analysis.solid_color, solid_color);

	analysis.is_solid_color = false;
	raster->PerformSolidColorAnalysis(gfx::Rect(35, 35, 10, 10), 0.1f, &analysis);
	EXPECT_TRUE(analysis.is_solid_color);
	EXPECT_EQ(analysis.solid_color, solid_color);
	}

	TEST(DisplayListRasterSourceTest, AnalyzeIsSolidEmpty) {
	gfx::Size layer_bounds(400, 400);

	scoped_ptr<FakeDisplayListRecordingSource> recording_source =
	FakeDisplayListRecordingSource::CreateFilledRecordingSource(layer_bounds);
	recording_source->Rerecord();

	scoped_refptr<DisplayListRasterSource> raster =
	DisplayListRasterSource::CreateFromDisplayListRecordingSource(
	recording_source.get(), false);
	RasterSource::SolidColorAnalysis analysis;
	EXPECT_FALSE(analysis.is_solid_color);

	raster->PerformSolidColorAnalysis(gfx::Rect(0, 0, 400, 400), 1.f, &analysis);

	EXPECT_TRUE(analysis.is_solid_color);
	EXPECT_EQ(analysis.solid_color, SkColorSetARGB(0, 0, 0, 0));
	}

	TEST(DisplayListRasterSourceTest, PixelRefIteratorDiscardableRefsOneTile) {
	gfx::Size layer_bounds(512, 512);

	scoped_ptr<FakeDisplayListRecordingSource> recording_source =
	FakeDisplayListRecordingSource::CreateFilledRecordingSource(layer_bounds);

	SkBitmap discardable_bitmap[2][2];
	CreateBitmap(gfx::Size(32, 32), "discardable", &discardable_bitmap[0][0]);
	CreateBitmap(gfx::Size(32, 32), "discardable", &discardable_bitmap[0][1]);
	CreateBitmap(gfx::Size(32, 32), "discardable", &discardable_bitmap[1][1]);

	// Discardable pixel refs are found in the following cells:
	// \|---\|---\|
	// \| x \| x \|
	// \|---\|---\|
	// \| \| x \|
	// \|---\|---\|
	recording_source->add_draw_bitmap(discardable_bitmap[0][0], gfx::Point(0, 0));
	recording_source->add_draw_bitmap(discardable_bitmap[0][1],
	gfx::Point(260, 0));
	recording_source->add_draw_bitmap(discardable_bitmap[1][1],
	gfx::Point(260, 260));
	recording_source->SetGatherPixelRefs(true);
	recording_source->Rerecord();

	scoped_refptr<DisplayListRasterSource> raster =
	DisplayListRasterSource::CreateFromDisplayListRecordingSource(
	recording_source.get(), false);

	// Tile sized iterators. These should find only one pixel ref.
	{
	std::vector<SkPixelRef*> pixel_refs;
	raster->GatherPixelRefs(gfx::Rect(0, 0, 256, 256), 1.0, &pixel_refs);
	EXPECT_EQ(1u, pixel_refs.size());
	EXPECT_EQ(discardable_bitmap[0][0].pixelRef(), pixel_refs[0]);
	}
	{
	std::vector<SkPixelRef*> pixel_refs;
	raster->GatherPixelRefs(gfx::Rect(0, 0, 512, 512), 2.0, &pixel_refs);
	EXPECT_EQ(1u, pixel_refs.size());
	EXPECT_EQ(discardable_bitmap[0][0].pixelRef(), pixel_refs[0]);
	}
	{
	std::vector<SkPixelRef*> pixel_refs;
	raster->GatherPixelRefs(gfx::Rect(0, 0, 128, 128), 0.5, &pixel_refs);
	EXPECT_EQ(1u, pixel_refs.size());
	EXPECT_EQ(discardable_bitmap[0][0].pixelRef(), pixel_refs[0]);
	}
	// Shifted tile sized iterators. These should find only one pixel ref.
	{
	std::vector<SkPixelRef*> pixel_refs;
	raster->GatherPixelRefs(gfx::Rect(260, 260, 256, 256), 1.0, &pixel_refs);
	EXPECT_EQ(1u, pixel_refs.size());
	EXPECT_EQ(discardable_bitmap[1][1].pixelRef(), pixel_refs[0]);
	}
	{
	std::vector<SkPixelRef*> pixel_refs;
	raster->GatherPixelRefs(gfx::Rect(520, 520, 512, 512), 2.0, &pixel_refs);
	EXPECT_EQ(1u, pixel_refs.size());
	EXPECT_EQ(discardable_bitmap[1][1].pixelRef(), pixel_refs[0]);
	}
	{
	std::vector<SkPixelRef*> pixel_refs;
	raster->GatherPixelRefs(gfx::Rect(130, 130, 128, 128), 0.5, &pixel_refs);
	EXPECT_EQ(1u, pixel_refs.size());
	EXPECT_EQ(discardable_bitmap[1][1].pixelRef(), pixel_refs[0]);
	}
	// Ensure there's no discardable pixel refs in the empty cell
	{
	std::vector<SkPixelRef*> pixel_refs;
	raster->GatherPixelRefs(gfx::Rect(0, 256, 256, 256), 1.0, &pixel_refs);
	EXPECT_EQ(0u, pixel_refs.size());
	}
	// Layer sized iterators. These should find three pixel ref.
	{
	std::vector<SkPixelRef*> pixel_refs;
	raster->GatherPixelRefs(gfx::Rect(0, 0, 512, 512), 1.0, &pixel_refs);
	EXPECT_EQ(3u, pixel_refs.size());
	EXPECT_EQ(discardable_bitmap[0][0].pixelRef(), pixel_refs[0]);
	EXPECT_EQ(discardable_bitmap[0][1].pixelRef(), pixel_refs[1]);
	EXPECT_EQ(discardable_bitmap[1][1].pixelRef(), pixel_refs[2]);
	}
	{
	std::vector<SkPixelRef*> pixel_refs;
	raster->GatherPixelRefs(gfx::Rect(0, 0, 1024, 1024), 2.0, &pixel_refs);
	EXPECT_EQ(3u, pixel_refs.size());
	EXPECT_EQ(discardable_bitmap[0][0].pixelRef(), pixel_refs[0]);
	EXPECT_EQ(discardable_bitmap[0][1].pixelRef(), pixel_refs[1]);
	EXPECT_EQ(discardable_bitmap[1][1].pixelRef(), pixel_refs[2]);
	}
	{
	std::vector<SkPixelRef*> pixel_refs;
	raster->GatherPixelRefs(gfx::Rect(0, 0, 256, 256), 0.5, &pixel_refs);
	EXPECT_EQ(3u, pixel_refs.size());
	EXPECT_EQ(discardable_bitmap[0][0].pixelRef(), pixel_refs[0]);
	EXPECT_EQ(discardable_bitmap[0][1].pixelRef(), pixel_refs[1]);
	EXPECT_EQ(discardable_bitmap[1][1].pixelRef(), pixel_refs[2]);
	}
	}

	TEST(DisplayListRasterSourceTest, RasterFullContents) {
	gfx::Size layer_bounds(3, 5);
	float contents_scale = 1.5f;
	float raster_divisions = 2.f;

	scoped_ptr<FakeDisplayListRecordingSource> recording_source =
	FakeDisplayListRecordingSource::CreateFilledRecordingSource(layer_bounds);
	recording_source->SetBackgroundColor(SK_ColorBLACK);
	recording_source->SetClearCanvasWithDebugColor(false);

	// Because the caller sets content opaque, it also promises that it
	// has at least filled in layer_bounds opaquely.
	SkPaint white_paint;
	white_paint.setColor(SK_ColorWHITE);
	recording_source->add_draw_rect_with_paint(gfx::Rect(layer_bounds),
	white_paint);
	recording_source->Rerecord();

	scoped_refptr<DisplayListRasterSource> raster =
	DisplayListRasterSource::CreateFromDisplayListRecordingSource(
	recording_source.get(), false);

	gfx::Size content_bounds(
	gfx::ToCeiledSize(gfx::ScaleSize(layer_bounds, contents_scale)));

	// Simulate drawing into different tiles at different offsets.
	int step_x = std::ceil(content_bounds.width() / raster_divisions);
	int step_y = std::ceil(content_bounds.height() / raster_divisions);
	for (int offset_x = 0; offset_x < content_bounds.width();
	offset_x += step_x) {
	for (int offset_y = 0; offset_y < content_bounds.height();
	offset_y += step_y) {
	gfx::Rect content_rect(offset_x, offset_y, step_x, step_y);
	content_rect.Intersect(gfx::Rect(content_bounds));

	// Simulate a canvas rect larger than the content rect. Every pixel
	// up to one pixel outside the content rect is guaranteed to be opaque.
	// Outside of that is undefined.
	gfx::Rect canvas_rect(content_rect);
	canvas_rect.Inset(0, 0, -1, -1);

	SkBitmap bitmap;
	bitmap.allocN32Pixels(canvas_rect.width(), canvas_rect.height());
	SkCanvas canvas(bitmap);
	canvas.clear(SK_ColorTRANSPARENT);

	raster->PlaybackToCanvas(&canvas, canvas_rect, canvas_rect,
	contents_scale);

	SkColor* pixels = reinterpret_cast<SkColor*>(bitmap.getPixels());
	int num_pixels = bitmap.width() * bitmap.height();
	bool all_white = true;
	for (int i = 0; i < num_pixels; ++i) {
	EXPECT_EQ(SkColorGetA(pixels[i]), 255u);
	all_white &= (SkColorGetR(pixels[i]) == 255);
	all_white &= (SkColorGetG(pixels[i]) == 255);
	all_white &= (SkColorGetB(pixels[i]) == 255);
	}

	// If the canvas doesn't extend past the edge of the content,
	// it should be entirely white. Otherwise, the edge of the content
	// will be non-white.
	EXPECT_EQ(all_white, gfx::Rect(content_bounds).Contains(canvas_rect));
	}
	}
	}

	TEST(DisplayListRasterSourceTest, RasterPartialContents) {
	gfx::Size layer_bounds(3, 5);
	float contents_scale = 1.5f;

	scoped_ptr<FakeDisplayListRecordingSource> recording_source =
	FakeDisplayListRecordingSource::CreateFilledRecordingSource(layer_bounds);
	recording_source->SetBackgroundColor(SK_ColorGREEN);
	recording_source->SetClearCanvasWithDebugColor(false);

	// First record everything as white.
	SkPaint white_paint;
	white_paint.setColor(SK_ColorWHITE);
	recording_source->add_draw_rect_with_paint(gfx::Rect(layer_bounds),
	white_paint);
	recording_source->Rerecord();

	scoped_refptr<DisplayListRasterSource> raster =
	DisplayListRasterSource::CreateFromDisplayListRecordingSource(
	recording_source.get(), false);

	gfx::Size content_bounds(
	gfx::ToCeiledSize(gfx::ScaleSize(layer_bounds, contents_scale)));

	SkBitmap bitmap;
	bitmap.allocN32Pixels(content_bounds.width(), content_bounds.height());
	SkCanvas canvas(bitmap);
	canvas.clear(SK_ColorTRANSPARENT);

	// Playback the full rect which should make everything white.
	gfx::Rect raster_full_rect(content_bounds);
	gfx::Rect playback_rect(content_bounds);
	raster->PlaybackToCanvas(&canvas, raster_full_rect, playback_rect,
	contents_scale);

	{
	SkColor* pixels = reinterpret_cast<SkColor*>(bitmap.getPixels());
	for (int i = 0; i < bitmap.width(); ++i) {
	for (int j = 0; j < bitmap.height(); ++j) {
	SCOPED_TRACE(i);
	SCOPED_TRACE(j);
	EXPECT_EQ(255u, SkColorGetA(pixels[i + j * bitmap.width()]));
	EXPECT_EQ(255u, SkColorGetR(pixels[i + j * bitmap.width()]));
	EXPECT_EQ(255u, SkColorGetG(pixels[i + j * bitmap.width()]));
	EXPECT_EQ(255u, SkColorGetB(pixels[i + j * bitmap.width()]));
	}
	}
	}

	// Re-record everything as black.
	SkPaint black_paint;
	black_paint.setColor(SK_ColorBLACK);
	recording_source->add_draw_rect_with_paint(gfx::Rect(layer_bounds),
	black_paint);
	recording_source->Rerecord();

	// Make a new RasterSource from the new recording.
	raster = DisplayListRasterSource::CreateFromDisplayListRecordingSource(
	recording_source.get(), false);

	// We're going to playback from "everything is black" into a smaller area,
	// that touches the edge pixels of the recording.
	playback_rect.Inset(1, 2, 0, 1);
	raster->PlaybackToCanvas(&canvas, raster_full_rect, playback_rect,
	contents_scale);

	SkColor* pixels = reinterpret_cast<SkColor*>(bitmap.getPixels());
	int num_black = 0;
	int num_white = 0;
	for (int i = 0; i < bitmap.width(); ++i) {
	for (int j = 0; j < bitmap.height(); ++j) {
	SCOPED_TRACE(j);
	SCOPED_TRACE(i);
	bool expect_black = playback_rect.Contains(i, j);
	if (expect_black) {
	EXPECT_EQ(255u, SkColorGetA(pixels[i + j * bitmap.width()]));
	EXPECT_EQ(0u, SkColorGetR(pixels[i + j * bitmap.width()]));
	EXPECT_EQ(0u, SkColorGetG(pixels[i + j * bitmap.width()]));
	EXPECT_EQ(0u, SkColorGetB(pixels[i + j * bitmap.width()]));
	++num_black;
	} else {
	EXPECT_EQ(255u, SkColorGetA(pixels[i + j * bitmap.width()]));
	EXPECT_EQ(255u, SkColorGetR(pixels[i + j * bitmap.width()]));
	EXPECT_EQ(255u, SkColorGetG(pixels[i + j * bitmap.width()]));
	EXPECT_EQ(255u, SkColorGetB(pixels[i + j * bitmap.width()]));
	++num_white;
	}
	}
	}
	EXPECT_GT(num_black, 0);
	EXPECT_GT(num_white, 0);
	}

	TEST(DisplayListRasterSourceTest, RasterContentsTransparent) {
	gfx::Size layer_bounds(5, 3);
	float contents_scale = 0.5f;

	scoped_ptr<FakeDisplayListRecordingSource> recording_source =
	FakeDisplayListRecordingSource::CreateFilledRecordingSource(layer_bounds);
	recording_source->SetBackgroundColor(SK_ColorTRANSPARENT);
	recording_source->SetRequiresClear(true);
	recording_source->SetClearCanvasWithDebugColor(false);
	recording_source->Rerecord();

	scoped_refptr<DisplayListRasterSource> raster =
	DisplayListRasterSource::CreateFromDisplayListRecordingSource(
	recording_source.get(), false);
	gfx::Size content_bounds(
	gfx::ToCeiledSize(gfx::ScaleSize(layer_bounds, contents_scale)));

	gfx::Rect canvas_rect(content_bounds);
	canvas_rect.Inset(0, 0, -1, -1);

	SkBitmap bitmap;
	bitmap.allocN32Pixels(canvas_rect.width(), canvas_rect.height());
	SkCanvas canvas(bitmap);

	raster->PlaybackToCanvas(&canvas, canvas_rect, canvas_rect, contents_scale);

	SkColor* pixels = reinterpret_cast<SkColor*>(bitmap.getPixels());
	int num_pixels = bitmap.width() * bitmap.height();
	for (int i = 0; i < num_pixels; ++i) {
	EXPECT_EQ(SkColorGetA(pixels[i]), 0u);
	}
	}

	} // namespace
	} // namespace cc