cc/output/software_renderer_unittest.cc - chromium/src - Git at Google

 // Copyright 2012 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 "cc/output/software_renderer.h"

 #include <stdint.h>

 #include "base/run_loop.h"
 #include "cc/output/compositor_frame_metadata.h"
 #include "cc/output/copy_output_request.h"
 #include "cc/output/copy_output_result.h"
 #include "cc/output/software_output_device.h"
 #include "cc/quads/render_pass.h"
 #include "cc/quads/render_pass_draw_quad.h"
 #include "cc/quads/solid_color_draw_quad.h"
 #include "cc/quads/tile_draw_quad.h"
 #include "cc/test/animation_test_common.h"
 #include "cc/test/fake_output_surface.h"
 #include "cc/test/fake_output_surface_client.h"
 #include "cc/test/fake_resource_provider.h"
 #include "cc/test/geometry_test_utils.h"
 #include "cc/test/render_pass_test_utils.h"
 #include "cc/test/test_shared_bitmap_manager.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkCanvas.h"

 namespace cc {
 namespace {

 class SoftwareRendererTest : public testing::Test, public RendererClient {
  public:
   void InitializeRenderer(
       scoped_ptr<SoftwareOutputDevice> software_output_device) {
     output_surface_ =
         FakeOutputSurface::CreateSoftware(std::move(software_output_device));
     CHECK(output_surface_->BindToClient(&output_surface_client_));

     shared_bitmap_manager_.reset(new TestSharedBitmapManager());
     resource_provider_ = FakeResourceProvider::Create(
         output_surface_.get(), shared_bitmap_manager_.get());
     renderer_ = SoftwareRenderer::Create(
         this, &settings_, output_surface_.get(), resource_provider());
   }

   ResourceProvider* resource_provider() const {
     return resource_provider_.get();
   }

   SoftwareRenderer* renderer() const { return renderer_.get(); }

   // RendererClient implementation.
   void SetFullRootLayerDamage() override {}

   scoped_ptr<SkBitmap> DrawAndCopyOutput(RenderPassList* list,
                                          float device_scale_factor,
                                          gfx::Rect device_viewport_rect) {
     scoped_ptr<SkBitmap> bitmap_result;
     base::RunLoop loop;

     list->back()->copy_requests.push_back(
         CopyOutputRequest::CreateBitmapRequest(
             base::Bind(&SoftwareRendererTest::SaveBitmapResult,
                        base::Unretained(&bitmap_result),
                        loop.QuitClosure())));

     renderer()->DrawFrame(list,
                           device_scale_factor,
                           device_viewport_rect,
                           device_viewport_rect,
                           false);
     loop.Run();
     return bitmap_result;
   }

   static void SaveBitmapResult(scoped_ptr<SkBitmap>* bitmap_result,
                                const base::Closure& quit_closure,
                                scoped_ptr<CopyOutputResult> result) {
     DCHECK(result->HasBitmap());
     *bitmap_result = result->TakeBitmap();
     quit_closure.Run();
   }

  protected:
   RendererSettings settings_;
   FakeOutputSurfaceClient output_surface_client_;
   scoped_ptr<FakeOutputSurface> output_surface_;
   scoped_ptr<SharedBitmapManager> shared_bitmap_manager_;
   scoped_ptr<ResourceProvider> resource_provider_;
   scoped_ptr<SoftwareRenderer> renderer_;
 };

 TEST_F(SoftwareRendererTest, SolidColorQuad) {
   gfx::Size outer_size(100, 100);
   gfx::Size inner_size(98, 98);
   gfx::Rect outer_rect(outer_size);
   gfx::Rect inner_rect(gfx::Point(1, 1), inner_size);
   gfx::Rect visible_rect(gfx::Point(1, 2), gfx::Size(98, 97));

   InitializeRenderer(make_scoped_ptr(new SoftwareOutputDevice));

   RenderPassId root_render_pass_id = RenderPassId(1, 1);
   scoped_ptr<RenderPass> root_render_pass = RenderPass::Create();
   root_render_pass->SetNew(
       root_render_pass_id, outer_rect, outer_rect, gfx::Transform());
   SharedQuadState* shared_quad_state =
       root_render_pass->CreateAndAppendSharedQuadState();
   shared_quad_state->SetAll(gfx::Transform(),
                             outer_size,
                             outer_rect,
                             outer_rect,
                             false,
                             1.0,
                             SkXfermode::kSrcOver_Mode,
                             0);
   SolidColorDrawQuad* inner_quad =
       root_render_pass->CreateAndAppendDrawQuad<SolidColorDrawQuad>();
   inner_quad->SetNew(
       shared_quad_state, inner_rect, inner_rect, SK_ColorCYAN, false);
   inner_quad->visible_rect = visible_rect;
   SolidColorDrawQuad* outer_quad =
       root_render_pass->CreateAndAppendDrawQuad<SolidColorDrawQuad>();
   outer_quad->SetNew(
       shared_quad_state, outer_rect, outer_rect, SK_ColorYELLOW, false);

   RenderPassList list;
   list.push_back(std::move(root_render_pass));

   float device_scale_factor = 1.f;
   gfx::Rect device_viewport_rect(outer_size);
   scoped_ptr<SkBitmap> output =
       DrawAndCopyOutput(&list, device_scale_factor, device_viewport_rect);
   EXPECT_EQ(outer_rect.width(), output->info().width());
   EXPECT_EQ(outer_rect.height(), output->info().height());

   EXPECT_EQ(SK_ColorYELLOW, output->getColor(0, 0));
   EXPECT_EQ(SK_ColorYELLOW,
             output->getColor(outer_size.width() - 1, outer_size.height() - 1));
   EXPECT_EQ(SK_ColorYELLOW, output->getColor(1, 1));
   EXPECT_EQ(SK_ColorCYAN, output->getColor(1, 2));
   EXPECT_EQ(SK_ColorCYAN,
             output->getColor(inner_size.width() - 1, inner_size.height() - 1));
 }

 TEST_F(SoftwareRendererTest, TileQuad) {
   gfx::Size outer_size(100, 100);
   gfx::Size inner_size(98, 98);
   gfx::Rect outer_rect(outer_size);
   gfx::Rect inner_rect(gfx::Point(1, 1), inner_size);
   InitializeRenderer(make_scoped_ptr(new SoftwareOutputDevice));

   ResourceId resource_yellow = resource_provider()->CreateResource(
       outer_size, ResourceProvider::TEXTURE_HINT_IMMUTABLE, RGBA_8888);
   ResourceId resource_cyan = resource_provider()->CreateResource(
       inner_size, ResourceProvider::TEXTURE_HINT_IMMUTABLE, RGBA_8888);

   SkBitmap yellow_tile;
   yellow_tile.allocN32Pixels(outer_size.width(), outer_size.height());
   yellow_tile.eraseColor(SK_ColorYELLOW);

   SkBitmap cyan_tile;
   cyan_tile.allocN32Pixels(inner_size.width(), inner_size.height());
   cyan_tile.eraseColor(SK_ColorCYAN);

   resource_provider()->CopyToResource(
       resource_yellow, static_cast<uint8_t*>(yellow_tile.getPixels()),
       outer_size);
   resource_provider()->CopyToResource(
       resource_cyan, static_cast<uint8_t*>(cyan_tile.getPixels()), inner_size);

   gfx::Rect root_rect = outer_rect;

   RenderPassId root_render_pass_id = RenderPassId(1, 1);
   scoped_ptr<RenderPass> root_render_pass = RenderPass::Create();
   root_render_pass->SetNew(
       root_render_pass_id, root_rect, root_rect, gfx::Transform());
   SharedQuadState* shared_quad_state =
       root_render_pass->CreateAndAppendSharedQuadState();
   shared_quad_state->SetAll(gfx::Transform(),
                             outer_size,
                             outer_rect,
                             outer_rect,
                             false,
                             1.0,
                             SkXfermode::kSrcOver_Mode,
                             0);
   TileDrawQuad* inner_quad =
       root_render_pass->CreateAndAppendDrawQuad<TileDrawQuad>();
   inner_quad->SetNew(shared_quad_state, inner_rect, inner_rect, inner_rect,
                      resource_cyan, gfx::RectF(gfx::SizeF(inner_size)),
                      inner_size, false, false);
   TileDrawQuad* outer_quad =
       root_render_pass->CreateAndAppendDrawQuad<TileDrawQuad>();
   outer_quad->SetNew(shared_quad_state, outer_rect, outer_rect, outer_rect,
                      resource_yellow, gfx::RectF(gfx::SizeF(outer_size)),
                      outer_size, false, false);

   RenderPassList list;
   list.push_back(std::move(root_render_pass));

   float device_scale_factor = 1.f;
   gfx::Rect device_viewport_rect(outer_size);
   scoped_ptr<SkBitmap> output =
       DrawAndCopyOutput(&list, device_scale_factor, device_viewport_rect);
   EXPECT_EQ(outer_rect.width(), output->info().width());
   EXPECT_EQ(outer_rect.height(), output->info().height());

   EXPECT_EQ(SK_ColorYELLOW, output->getColor(0, 0));
   EXPECT_EQ(SK_ColorYELLOW,
             output->getColor(outer_size.width() - 1, outer_size.height() - 1));
   EXPECT_EQ(SK_ColorCYAN, output->getColor(1, 1));
   EXPECT_EQ(SK_ColorCYAN,
             output->getColor(inner_size.width() - 1, inner_size.height() - 1));
 }

 TEST_F(SoftwareRendererTest, TileQuadVisibleRect) {
   gfx::Size tile_size(100, 100);
   gfx::Rect tile_rect(tile_size);
   gfx::Rect visible_rect = tile_rect;
   visible_rect.Inset(1, 2, 3, 4);
   InitializeRenderer(make_scoped_ptr(new SoftwareOutputDevice));

   ResourceId resource_cyan = resource_provider()->CreateResource(
       tile_size, ResourceProvider::TEXTURE_HINT_IMMUTABLE, RGBA_8888);

   SkBitmap cyan_tile;  // The lowest five rows are yellow.
   cyan_tile.allocN32Pixels(tile_size.width(), tile_size.height());
   cyan_tile.eraseColor(SK_ColorCYAN);
   cyan_tile.eraseArea(
       SkIRect::MakeLTRB(
           0, visible_rect.bottom() - 1, tile_rect.width(), tile_rect.bottom()),
       SK_ColorYELLOW);

   resource_provider()->CopyToResource(
       resource_cyan, static_cast<uint8_t*>(cyan_tile.getPixels()), tile_size);

   gfx::Rect root_rect(tile_size);

   RenderPassId root_render_pass_id = RenderPassId(1, 1);
   scoped_ptr<RenderPass> root_render_pass = RenderPass::Create();
   root_render_pass->SetNew(
       root_render_pass_id, root_rect, root_rect, gfx::Transform());
   SharedQuadState* shared_quad_state =
       root_render_pass->CreateAndAppendSharedQuadState();
   shared_quad_state->SetAll(gfx::Transform(),
                             tile_size,
                             tile_rect,
                             tile_rect,
                             false,
                             1.0,
                             SkXfermode::kSrcOver_Mode,
                             0);
   TileDrawQuad* quad =
       root_render_pass->CreateAndAppendDrawQuad<TileDrawQuad>();
   quad->SetNew(shared_quad_state, tile_rect, tile_rect, tile_rect,
                resource_cyan, gfx::RectF(gfx::SizeF(tile_size)), tile_size,
                false, false);
   quad->visible_rect = visible_rect;

   RenderPassList list;
   list.push_back(std::move(root_render_pass));

   float device_scale_factor = 1.f;
   gfx::Rect device_viewport_rect(tile_size);
   scoped_ptr<SkBitmap> output =
       DrawAndCopyOutput(&list, device_scale_factor, device_viewport_rect);
   EXPECT_EQ(tile_rect.width(), output->info().width());
   EXPECT_EQ(tile_rect.height(), output->info().height());

   // Check portion of tile not in visible rect isn't drawn.
   const unsigned int kTransparent = SK_ColorTRANSPARENT;
   EXPECT_EQ(kTransparent, output->getColor(0, 0));
   EXPECT_EQ(kTransparent,
             output->getColor(tile_rect.width() - 1, tile_rect.height() - 1));
   EXPECT_EQ(kTransparent,
             output->getColor(visible_rect.x() - 1, visible_rect.y() - 1));
   EXPECT_EQ(kTransparent,
             output->getColor(visible_rect.right(), visible_rect.bottom()));
   // Ensure visible part is drawn correctly.
   EXPECT_EQ(SK_ColorCYAN, output->getColor(visible_rect.x(), visible_rect.y()));
   EXPECT_EQ(
       SK_ColorCYAN,
       output->getColor(visible_rect.right() - 2, visible_rect.bottom() - 2));
   // Ensure last visible line is correct.
   EXPECT_EQ(
       SK_ColorYELLOW,
       output->getColor(visible_rect.right() - 1, visible_rect.bottom() - 1));
 }

 TEST_F(SoftwareRendererTest, ShouldClearRootRenderPass) {
   float device_scale_factor = 1.f;
   gfx::Rect device_viewport_rect(0, 0, 100, 100);

   settings_.should_clear_root_render_pass = false;
   InitializeRenderer(make_scoped_ptr(new SoftwareOutputDevice));

   RenderPassList list;

   // Draw a fullscreen green quad in a first frame.
   RenderPassId root_clear_pass_id(1, 0);
   RenderPass* root_clear_pass = AddRenderPass(
       &list, root_clear_pass_id, device_viewport_rect, gfx::Transform());
   AddQuad(root_clear_pass, device_viewport_rect, SK_ColorGREEN);

   renderer()->DecideRenderPassAllocationsForFrame(list);

   scoped_ptr<SkBitmap> output =
       DrawAndCopyOutput(&list, device_scale_factor, device_viewport_rect);
   EXPECT_EQ(device_viewport_rect.width(), output->info().width());
   EXPECT_EQ(device_viewport_rect.height(), output->info().height());

   EXPECT_EQ(SK_ColorGREEN, output->getColor(0, 0));
   EXPECT_EQ(SK_ColorGREEN,
             output->getColor(device_viewport_rect.width() - 1,
                              device_viewport_rect.height() - 1));

   list.clear();

   // Draw a smaller magenta rect without filling the viewport in a separate
   // frame.
   gfx::Rect smaller_rect(20, 20, 60, 60);

   RenderPassId root_smaller_pass_id(2, 0);
   RenderPass* root_smaller_pass = AddRenderPass(
       &list, root_smaller_pass_id, device_viewport_rect, gfx::Transform());
   AddQuad(root_smaller_pass, smaller_rect, SK_ColorMAGENTA);

   renderer()->DecideRenderPassAllocationsForFrame(list);

   output = DrawAndCopyOutput(&list, device_scale_factor, device_viewport_rect);
   EXPECT_EQ(device_viewport_rect.width(), output->info().width());
   EXPECT_EQ(device_viewport_rect.height(), output->info().height());

   // If we didn't clear, the borders should still be green.
   EXPECT_EQ(SK_ColorGREEN, output->getColor(0, 0));
   EXPECT_EQ(SK_ColorGREEN,
             output->getColor(device_viewport_rect.width() - 1,
                              device_viewport_rect.height() - 1));

   EXPECT_EQ(SK_ColorMAGENTA,
             output->getColor(smaller_rect.x(), smaller_rect.y()));
   EXPECT_EQ(
       SK_ColorMAGENTA,
       output->getColor(smaller_rect.right() - 1, smaller_rect.bottom() - 1));
 }

 TEST_F(SoftwareRendererTest, RenderPassVisibleRect) {
   float device_scale_factor = 1.f;
   gfx::Rect device_viewport_rect(0, 0, 100, 100);
   InitializeRenderer(make_scoped_ptr(new SoftwareOutputDevice));

   RenderPassList list;

   // Pass drawn as inner quad is magenta.
   gfx::Rect smaller_rect(20, 20, 60, 60);
   RenderPassId smaller_pass_id(2, 1);
   RenderPass* smaller_pass =
       AddRenderPass(&list, smaller_pass_id, smaller_rect, gfx::Transform());
   AddQuad(smaller_pass, smaller_rect, SK_ColorMAGENTA);

   // Root pass is green.
   RenderPassId root_clear_pass_id(1, 0);
   RenderPass* root_clear_pass = AddRenderPass(
       &list, root_clear_pass_id, device_viewport_rect, gfx::Transform());
   AddRenderPassQuad(root_clear_pass, smaller_pass);
   AddQuad(root_clear_pass, device_viewport_rect, SK_ColorGREEN);

   // Interior pass quad has smaller visible rect.
   gfx::Rect interior_visible_rect(30, 30, 40, 40);
   root_clear_pass->quad_list.front()->visible_rect = interior_visible_rect;

   renderer()->DecideRenderPassAllocationsForFrame(list);

   scoped_ptr<SkBitmap> output =
       DrawAndCopyOutput(&list, device_scale_factor, device_viewport_rect);
   EXPECT_EQ(device_viewport_rect.width(), output->info().width());
   EXPECT_EQ(device_viewport_rect.height(), output->info().height());

   EXPECT_EQ(SK_ColorGREEN, output->getColor(0, 0));
   EXPECT_EQ(SK_ColorGREEN,
             output->getColor(device_viewport_rect.width() - 1,
                              device_viewport_rect.height() - 1));

   // Part outside visible rect should remain green.
   EXPECT_EQ(SK_ColorGREEN,
             output->getColor(smaller_rect.x(), smaller_rect.y()));
   EXPECT_EQ(
       SK_ColorGREEN,
       output->getColor(smaller_rect.right() - 1, smaller_rect.bottom() - 1));

   EXPECT_EQ(
       SK_ColorMAGENTA,
       output->getColor(interior_visible_rect.x(), interior_visible_rect.y()));
   EXPECT_EQ(SK_ColorMAGENTA,
             output->getColor(interior_visible_rect.right() - 1,
                              interior_visible_rect.bottom() - 1));
 }

 }  // namespace
 }  // namespace cc
	// Copyright 2012 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 "cc/output/software_renderer.h"

	#include <stdint.h>

	#include "base/run_loop.h"
	#include "cc/output/compositor_frame_metadata.h"
	#include "cc/output/copy_output_request.h"
	#include "cc/output/copy_output_result.h"
	#include "cc/output/software_output_device.h"
	#include "cc/quads/render_pass.h"
	#include "cc/quads/render_pass_draw_quad.h"
	#include "cc/quads/solid_color_draw_quad.h"
	#include "cc/quads/tile_draw_quad.h"
	#include "cc/test/animation_test_common.h"
	#include "cc/test/fake_output_surface.h"
	#include "cc/test/fake_output_surface_client.h"
	#include "cc/test/fake_resource_provider.h"
	#include "cc/test/geometry_test_utils.h"
	#include "cc/test/render_pass_test_utils.h"
	#include "cc/test/test_shared_bitmap_manager.h"
	#include "testing/gmock/include/gmock/gmock.h"
	#include "testing/gtest/include/gtest/gtest.h"
	#include "third_party/skia/include/core/SkCanvas.h"

	namespace cc {
	namespace {

	class SoftwareRendererTest : public testing::Test, public RendererClient {
	public:
	void InitializeRenderer(
	scoped_ptr<SoftwareOutputDevice> software_output_device) {
	output_surface_ =
	FakeOutputSurface::CreateSoftware(std::move(software_output_device));
	CHECK(output_surface_->BindToClient(&output_surface_client_));

	shared_bitmap_manager_.reset(new TestSharedBitmapManager());
	resource_provider_ = FakeResourceProvider::Create(
	output_surface_.get(), shared_bitmap_manager_.get());
	renderer_ = SoftwareRenderer::Create(
	this, &settings_, output_surface_.get(), resource_provider());
	}

	ResourceProvider* resource_provider() const {
	return resource_provider_.get();
	}

	SoftwareRenderer* renderer() const { return renderer_.get(); }

	// RendererClient implementation.
	void SetFullRootLayerDamage() override {}

	scoped_ptr<SkBitmap> DrawAndCopyOutput(RenderPassList* list,
	float device_scale_factor,
	gfx::Rect device_viewport_rect) {
	scoped_ptr<SkBitmap> bitmap_result;
	base::RunLoop loop;

	list->back()->copy_requests.push_back(
	CopyOutputRequest::CreateBitmapRequest(
	base::Bind(&SoftwareRendererTest::SaveBitmapResult,
	base::Unretained(&bitmap_result),
	loop.QuitClosure())));

	renderer()->DrawFrame(list,
	device_scale_factor,
	device_viewport_rect,
	device_viewport_rect,
	false);
	loop.Run();
	return bitmap_result;
	}

	static void SaveBitmapResult(scoped_ptr<SkBitmap>* bitmap_result,
	const base::Closure& quit_closure,
	scoped_ptr<CopyOutputResult> result) {
	DCHECK(result->HasBitmap());
	*bitmap_result = result->TakeBitmap();
	quit_closure.Run();
	}

	protected:
	RendererSettings settings_;
	FakeOutputSurfaceClient output_surface_client_;
	scoped_ptr<FakeOutputSurface> output_surface_;
	scoped_ptr<SharedBitmapManager> shared_bitmap_manager_;
	scoped_ptr<ResourceProvider> resource_provider_;
	scoped_ptr<SoftwareRenderer> renderer_;
	};

	TEST_F(SoftwareRendererTest, SolidColorQuad) {
	gfx::Size outer_size(100, 100);
	gfx::Size inner_size(98, 98);
	gfx::Rect outer_rect(outer_size);
	gfx::Rect inner_rect(gfx::Point(1, 1), inner_size);
	gfx::Rect visible_rect(gfx::Point(1, 2), gfx::Size(98, 97));

	InitializeRenderer(make_scoped_ptr(new SoftwareOutputDevice));

	RenderPassId root_render_pass_id = RenderPassId(1, 1);
	scoped_ptr<RenderPass> root_render_pass = RenderPass::Create();
	root_render_pass->SetNew(
	root_render_pass_id, outer_rect, outer_rect, gfx::Transform());
	SharedQuadState* shared_quad_state =
	root_render_pass->CreateAndAppendSharedQuadState();
	shared_quad_state->SetAll(gfx::Transform(),
	outer_size,
	outer_rect,
	outer_rect,
	false,
	1.0,
	SkXfermode::kSrcOver_Mode,
	0);
	SolidColorDrawQuad* inner_quad =
	root_render_pass->CreateAndAppendDrawQuad<SolidColorDrawQuad>();
	inner_quad->SetNew(
	shared_quad_state, inner_rect, inner_rect, SK_ColorCYAN, false);
	inner_quad->visible_rect = visible_rect;
	SolidColorDrawQuad* outer_quad =
	root_render_pass->CreateAndAppendDrawQuad<SolidColorDrawQuad>();
	outer_quad->SetNew(
	shared_quad_state, outer_rect, outer_rect, SK_ColorYELLOW, false);

	RenderPassList list;
	list.push_back(std::move(root_render_pass));

	float device_scale_factor = 1.f;
	gfx::Rect device_viewport_rect(outer_size);
	scoped_ptr<SkBitmap> output =
	DrawAndCopyOutput(&list, device_scale_factor, device_viewport_rect);
	EXPECT_EQ(outer_rect.width(), output->info().width());
	EXPECT_EQ(outer_rect.height(), output->info().height());

	EXPECT_EQ(SK_ColorYELLOW, output->getColor(0, 0));
	EXPECT_EQ(SK_ColorYELLOW,
	output->getColor(outer_size.width() - 1, outer_size.height() - 1));
	EXPECT_EQ(SK_ColorYELLOW, output->getColor(1, 1));
	EXPECT_EQ(SK_ColorCYAN, output->getColor(1, 2));
	EXPECT_EQ(SK_ColorCYAN,
	output->getColor(inner_size.width() - 1, inner_size.height() - 1));
	}

	TEST_F(SoftwareRendererTest, TileQuad) {
	gfx::Size outer_size(100, 100);
	gfx::Size inner_size(98, 98);
	gfx::Rect outer_rect(outer_size);
	gfx::Rect inner_rect(gfx::Point(1, 1), inner_size);
	InitializeRenderer(make_scoped_ptr(new SoftwareOutputDevice));

	ResourceId resource_yellow = resource_provider()->CreateResource(
	outer_size, ResourceProvider::TEXTURE_HINT_IMMUTABLE, RGBA_8888);
	ResourceId resource_cyan = resource_provider()->CreateResource(
	inner_size, ResourceProvider::TEXTURE_HINT_IMMUTABLE, RGBA_8888);

	SkBitmap yellow_tile;
	yellow_tile.allocN32Pixels(outer_size.width(), outer_size.height());
	yellow_tile.eraseColor(SK_ColorYELLOW);

	SkBitmap cyan_tile;
	cyan_tile.allocN32Pixels(inner_size.width(), inner_size.height());
	cyan_tile.eraseColor(SK_ColorCYAN);

	resource_provider()->CopyToResource(
	resource_yellow, static_cast<uint8_t*>(yellow_tile.getPixels()),
	outer_size);
	resource_provider()->CopyToResource(
	resource_cyan, static_cast<uint8_t*>(cyan_tile.getPixels()), inner_size);

	gfx::Rect root_rect = outer_rect;

	RenderPassId root_render_pass_id = RenderPassId(1, 1);
	scoped_ptr<RenderPass> root_render_pass = RenderPass::Create();
	root_render_pass->SetNew(
	root_render_pass_id, root_rect, root_rect, gfx::Transform());
	SharedQuadState* shared_quad_state =
	root_render_pass->CreateAndAppendSharedQuadState();
	shared_quad_state->SetAll(gfx::Transform(),
	outer_size,
	outer_rect,
	outer_rect,
	false,
	1.0,
	SkXfermode::kSrcOver_Mode,
	0);
	TileDrawQuad* inner_quad =
	root_render_pass->CreateAndAppendDrawQuad<TileDrawQuad>();
	inner_quad->SetNew(shared_quad_state, inner_rect, inner_rect, inner_rect,
	resource_cyan, gfx::RectF(gfx::SizeF(inner_size)),
	inner_size, false, false);
	TileDrawQuad* outer_quad =
	root_render_pass->CreateAndAppendDrawQuad<TileDrawQuad>();
	outer_quad->SetNew(shared_quad_state, outer_rect, outer_rect, outer_rect,
	resource_yellow, gfx::RectF(gfx::SizeF(outer_size)),
	outer_size, false, false);

	RenderPassList list;
	list.push_back(std::move(root_render_pass));

	float device_scale_factor = 1.f;
	gfx::Rect device_viewport_rect(outer_size);
	scoped_ptr<SkBitmap> output =
	DrawAndCopyOutput(&list, device_scale_factor, device_viewport_rect);
	EXPECT_EQ(outer_rect.width(), output->info().width());
	EXPECT_EQ(outer_rect.height(), output->info().height());

	EXPECT_EQ(SK_ColorYELLOW, output->getColor(0, 0));
	EXPECT_EQ(SK_ColorYELLOW,
	output->getColor(outer_size.width() - 1, outer_size.height() - 1));
	EXPECT_EQ(SK_ColorCYAN, output->getColor(1, 1));
	EXPECT_EQ(SK_ColorCYAN,
	output->getColor(inner_size.width() - 1, inner_size.height() - 1));
	}

	TEST_F(SoftwareRendererTest, TileQuadVisibleRect) {
	gfx::Size tile_size(100, 100);
	gfx::Rect tile_rect(tile_size);
	gfx::Rect visible_rect = tile_rect;
	visible_rect.Inset(1, 2, 3, 4);
	InitializeRenderer(make_scoped_ptr(new SoftwareOutputDevice));

	ResourceId resource_cyan = resource_provider()->CreateResource(
	tile_size, ResourceProvider::TEXTURE_HINT_IMMUTABLE, RGBA_8888);

	SkBitmap cyan_tile; // The lowest five rows are yellow.
	cyan_tile.allocN32Pixels(tile_size.width(), tile_size.height());
	cyan_tile.eraseColor(SK_ColorCYAN);
	cyan_tile.eraseArea(
	SkIRect::MakeLTRB(
	0, visible_rect.bottom() - 1, tile_rect.width(), tile_rect.bottom()),
	SK_ColorYELLOW);

	resource_provider()->CopyToResource(
	resource_cyan, static_cast<uint8_t*>(cyan_tile.getPixels()), tile_size);

	gfx::Rect root_rect(tile_size);

	RenderPassId root_render_pass_id = RenderPassId(1, 1);
	scoped_ptr<RenderPass> root_render_pass = RenderPass::Create();
	root_render_pass->SetNew(
	root_render_pass_id, root_rect, root_rect, gfx::Transform());
	SharedQuadState* shared_quad_state =
	root_render_pass->CreateAndAppendSharedQuadState();
	shared_quad_state->SetAll(gfx::Transform(),
	tile_size,
	tile_rect,
	tile_rect,
	false,
	1.0,
	SkXfermode::kSrcOver_Mode,
	0);
	TileDrawQuad* quad =
	root_render_pass->CreateAndAppendDrawQuad<TileDrawQuad>();
	quad->SetNew(shared_quad_state, tile_rect, tile_rect, tile_rect,
	resource_cyan, gfx::RectF(gfx::SizeF(tile_size)), tile_size,
	false, false);
	quad->visible_rect = visible_rect;

	RenderPassList list;
	list.push_back(std::move(root_render_pass));

	float device_scale_factor = 1.f;
	gfx::Rect device_viewport_rect(tile_size);
	scoped_ptr<SkBitmap> output =
	DrawAndCopyOutput(&list, device_scale_factor, device_viewport_rect);
	EXPECT_EQ(tile_rect.width(), output->info().width());
	EXPECT_EQ(tile_rect.height(), output->info().height());

	// Check portion of tile not in visible rect isn't drawn.
	const unsigned int kTransparent = SK_ColorTRANSPARENT;
	EXPECT_EQ(kTransparent, output->getColor(0, 0));
	EXPECT_EQ(kTransparent,
	output->getColor(tile_rect.width() - 1, tile_rect.height() - 1));
	EXPECT_EQ(kTransparent,
	output->getColor(visible_rect.x() - 1, visible_rect.y() - 1));
	EXPECT_EQ(kTransparent,
	output->getColor(visible_rect.right(), visible_rect.bottom()));
	// Ensure visible part is drawn correctly.
	EXPECT_EQ(SK_ColorCYAN, output->getColor(visible_rect.x(), visible_rect.y()));
	EXPECT_EQ(
	SK_ColorCYAN,
	output->getColor(visible_rect.right() - 2, visible_rect.bottom() - 2));
	// Ensure last visible line is correct.
	EXPECT_EQ(
	SK_ColorYELLOW,
	output->getColor(visible_rect.right() - 1, visible_rect.bottom() - 1));
	}

	TEST_F(SoftwareRendererTest, ShouldClearRootRenderPass) {
	float device_scale_factor = 1.f;
	gfx::Rect device_viewport_rect(0, 0, 100, 100);

	settings_.should_clear_root_render_pass = false;
	InitializeRenderer(make_scoped_ptr(new SoftwareOutputDevice));

	RenderPassList list;

	// Draw a fullscreen green quad in a first frame.
	RenderPassId root_clear_pass_id(1, 0);
	RenderPass* root_clear_pass = AddRenderPass(
	&list, root_clear_pass_id, device_viewport_rect, gfx::Transform());
	AddQuad(root_clear_pass, device_viewport_rect, SK_ColorGREEN);

	renderer()->DecideRenderPassAllocationsForFrame(list);

	scoped_ptr<SkBitmap> output =
	DrawAndCopyOutput(&list, device_scale_factor, device_viewport_rect);
	EXPECT_EQ(device_viewport_rect.width(), output->info().width());
	EXPECT_EQ(device_viewport_rect.height(), output->info().height());

	EXPECT_EQ(SK_ColorGREEN, output->getColor(0, 0));
	EXPECT_EQ(SK_ColorGREEN,
	output->getColor(device_viewport_rect.width() - 1,
	device_viewport_rect.height() - 1));

	list.clear();

	// Draw a smaller magenta rect without filling the viewport in a separate
	// frame.
	gfx::Rect smaller_rect(20, 20, 60, 60);

	RenderPassId root_smaller_pass_id(2, 0);
	RenderPass* root_smaller_pass = AddRenderPass(
	&list, root_smaller_pass_id, device_viewport_rect, gfx::Transform());
	AddQuad(root_smaller_pass, smaller_rect, SK_ColorMAGENTA);

	renderer()->DecideRenderPassAllocationsForFrame(list);

	output = DrawAndCopyOutput(&list, device_scale_factor, device_viewport_rect);
	EXPECT_EQ(device_viewport_rect.width(), output->info().width());
	EXPECT_EQ(device_viewport_rect.height(), output->info().height());

	// If we didn't clear, the borders should still be green.
	EXPECT_EQ(SK_ColorGREEN, output->getColor(0, 0));
	EXPECT_EQ(SK_ColorGREEN,
	output->getColor(device_viewport_rect.width() - 1,
	device_viewport_rect.height() - 1));

	EXPECT_EQ(SK_ColorMAGENTA,
	output->getColor(smaller_rect.x(), smaller_rect.y()));
	EXPECT_EQ(
	SK_ColorMAGENTA,
	output->getColor(smaller_rect.right() - 1, smaller_rect.bottom() - 1));
	}

	TEST_F(SoftwareRendererTest, RenderPassVisibleRect) {
	float device_scale_factor = 1.f;
	gfx::Rect device_viewport_rect(0, 0, 100, 100);
	InitializeRenderer(make_scoped_ptr(new SoftwareOutputDevice));

	RenderPassList list;

	// Pass drawn as inner quad is magenta.
	gfx::Rect smaller_rect(20, 20, 60, 60);
	RenderPassId smaller_pass_id(2, 1);
	RenderPass* smaller_pass =
	AddRenderPass(&list, smaller_pass_id, smaller_rect, gfx::Transform());
	AddQuad(smaller_pass, smaller_rect, SK_ColorMAGENTA);

	// Root pass is green.
	RenderPassId root_clear_pass_id(1, 0);
	RenderPass* root_clear_pass = AddRenderPass(
	&list, root_clear_pass_id, device_viewport_rect, gfx::Transform());
	AddRenderPassQuad(root_clear_pass, smaller_pass);
	AddQuad(root_clear_pass, device_viewport_rect, SK_ColorGREEN);

	// Interior pass quad has smaller visible rect.
	gfx::Rect interior_visible_rect(30, 30, 40, 40);
	root_clear_pass->quad_list.front()->visible_rect = interior_visible_rect;

	renderer()->DecideRenderPassAllocationsForFrame(list);

	scoped_ptr<SkBitmap> output =
	DrawAndCopyOutput(&list, device_scale_factor, device_viewport_rect);
	EXPECT_EQ(device_viewport_rect.width(), output->info().width());
	EXPECT_EQ(device_viewport_rect.height(), output->info().height());

	EXPECT_EQ(SK_ColorGREEN, output->getColor(0, 0));
	EXPECT_EQ(SK_ColorGREEN,
	output->getColor(device_viewport_rect.width() - 1,
	device_viewport_rect.height() - 1));

	// Part outside visible rect should remain green.
	EXPECT_EQ(SK_ColorGREEN,
	output->getColor(smaller_rect.x(), smaller_rect.y()));
	EXPECT_EQ(
	SK_ColorGREEN,
	output->getColor(smaller_rect.right() - 1, smaller_rect.bottom() - 1));

	EXPECT_EQ(
	SK_ColorMAGENTA,
	output->getColor(interior_visible_rect.x(), interior_visible_rect.y()));
	EXPECT_EQ(SK_ColorMAGENTA,
	output->getColor(interior_visible_rect.right() - 1,
	interior_visible_rect.bottom() - 1));
	}

	} // namespace
	} // namespace cc