cc: Trigger GPU rasterization based on a per-layer hint

cc/layers/picture_layer_impl_unittest.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 "cc/layers/picture_layer_impl.h"
 
 #include <utility>
 
 #include "cc/layers/append_quads_data.h"
 #include "cc/layers/picture_layer.h"
 #include "cc/test/fake_content_layer_client.h"
 #include "cc/test/fake_impl_proxy.h"
 #include "cc/test/fake_layer_tree_host_impl.h"
 #include "cc/test/fake_output_surface.h"
 #include "cc/test/fake_picture_layer_impl.h"
 #include "cc/test/fake_picture_pile_impl.h"
 #include "cc/test/geometry_test_utils.h"
+#include "cc/test/gpu_rasterization_settings.h"
+#include "cc/test/hybrid_rasterization_settings.h"
 #include "cc/test/impl_side_painting_settings.h"
 #include "cc/test/mock_quad_culler.h"
 #include "cc/test/test_web_graphics_context_3d.h"
 #include "cc/trees/layer_tree_impl.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/rect_conversions.h"
 
 namespace cc {
 namespace {
 
 class MockCanvas : public SkCanvas {
  public:
   explicit MockCanvas(int w, int h) : SkCanvas(w, h) {}
 
   virtual void drawRect(const SkRect& rect, const SkPaint& paint) OVERRIDE {
     // Capture calls before SkCanvas quickReject() kicks in.
     rects_.push_back(rect);
   }
 
   std::vector<SkRect> rects_;
 };
 
 class PictureLayerImplTest : public testing::Test {
  public:
   PictureLayerImplTest()
       : proxy_(base::MessageLoopProxy::current()),
         host_impl_(ImplSidePaintingSettings(), &proxy_),
         id_(7) {}
 
+  explicit PictureLayerImplTest(const LayerTreeSettings& settings)
+      : proxy_(base::MessageLoopProxy::current()),
+        host_impl_(settings, &proxy_),
+        id_(7) {}
+
   virtual ~PictureLayerImplTest() {
   }
 
   virtual void SetUp() OVERRIDE {
     InitializeRenderer();
   }
 
   virtual void InitializeRenderer() {
     host_impl_.InitializeRenderer(
         FakeOutputSurface::Create3d().PassAs<OutputSurface>());
@@ skipping 1351 matching lines @@
   // Contrived unit test of a real crash. A layer is transparent during a
   // context loss, and later becomes opaque, causing active layer SyncTiling to
   // be called.
   const float tile_scale = 2.f;
   active_layer_->ReleaseResources();
   EXPECT_FALSE(active_layer_->tilings()->TilingAtScale(tile_scale));
   pending_layer_->AddTiling(2.f);
   EXPECT_TRUE(active_layer_->tilings()->TilingAtScale(tile_scale));
 }
 
-TEST_F(PictureLayerImplTest, TilingGpuRasterization) {
+TEST_F(PictureLayerImplTest, TilingWithoutGpuRasterization) {
   gfx::Size default_tile_size(host_impl_.settings().default_tile_size);
   gfx::Size layer_bounds(default_tile_size.width() * 4,
                          default_tile_size.height() * 4);
   float result_scale_x, result_scale_y;
   gfx::Size result_bounds;
 
-  // Layers without GPU rasterization (default).
   SetupDefaultTrees(layer_bounds);
+  EXPECT_FALSE(pending_layer_->ShouldUseGpuRasterization());
   EXPECT_EQ(0u, pending_layer_->tilings()->num_tilings());
   pending_layer_->CalculateContentsScale(
       1.f, 1.f, 1.f, false, &result_scale_x, &result_scale_y, &result_bounds);
   // Should have a low-res and a high-res tiling.
   ASSERT_EQ(2u, pending_layer_->tilings()->num_tilings());
-
-  // Tell the layer to use GPU rasterization.
-  pending_layer_->SetShouldUseGpuRasterization(true);
-  EXPECT_EQ(0u, pending_layer_->tilings()->num_tilings());
-  pending_layer_->CalculateContentsScale(
-      1.f, 1.f, 1.f, false, &result_scale_x, &result_scale_y, &result_bounds);
-  // Should only have the high-res tiling.
-  ASSERT_EQ(1u, pending_layer_->tilings()->num_tilings());
 }
 
 TEST_F(PictureLayerImplTest, NoTilingIfDoesNotDrawContent) {
   // Set up layers with tilings.
   SetupDefaultTrees(gfx::Size(10, 10));
   SetContentsScaleOnBothLayers(1.f, 1.f, 1.f, false);
   pending_layer_->PushPropertiesTo(active_layer_);
   EXPECT_TRUE(pending_layer_->DrawsContent());
   EXPECT_TRUE(pending_layer_->CanHaveTilings());
   EXPECT_GE(pending_layer_->num_tilings(), 0u);
@@ skipping 95 matching lines @@
       static_cast<FakeOutputSurface*>(host_impl_.output_surface());
   ASSERT_TRUE(fake_output_surface->InitializeAndSetContext3d(
       TestContextProvider::Create(), NULL));
 
   // These will crash PictureLayerImpl if this is not true.
   ASSERT_TRUE(host_impl_.pending_tree()->needs_update_draw_properties());
   ASSERT_TRUE(host_impl_.active_tree()->needs_update_draw_properties());
   host_impl_.active_tree()->UpdateDrawProperties();
 }
 
+class HybridRasterizationPictureLayerImplTest : public PictureLayerImplTest {
+ public:
+  HybridRasterizationPictureLayerImplTest()
+      : PictureLayerImplTest(HybridRasterizationSettings()) {}
+};
+
+TEST_F(HybridRasterizationPictureLayerImplTest, Tiling) {
+  gfx::Size default_tile_size(host_impl_.settings().default_tile_size);
+  gfx::Size layer_bounds(default_tile_size.width() * 4,
+                         default_tile_size.height() * 4);
+  float result_scale_x, result_scale_y;
+  gfx::Size result_bounds;
+
+  SetupDefaultTrees(layer_bounds);
+  EXPECT_FALSE(pending_layer_->ShouldUseGpuRasterization());
+  EXPECT_EQ(0u, pending_layer_->tilings()->num_tilings());
+  pending_layer_->CalculateContentsScale(
+      1.f, 1.f, 1.f, false, &result_scale_x, &result_scale_y, &result_bounds);
+  // Should have a low-res and a high-res tiling.
+  ASSERT_EQ(2u, pending_layer_->tilings()->num_tilings());
+
+  pending_layer_->SetHasGpuRasterizationHint(true);
+  EXPECT_TRUE(pending_layer_->ShouldUseGpuRasterization());
+  EXPECT_EQ(0u, pending_layer_->tilings()->num_tilings());
+  pending_layer_->CalculateContentsScale(
+      1.f, 1.f, 1.f, false, &result_scale_x, &result_scale_y, &result_bounds);
+  // Should only have the high-res tiling.
+  ASSERT_EQ(1u, pending_layer_->tilings()->num_tilings());
+}
+
+class GpuRasterizationPictureLayerImplTest : public PictureLayerImplTest {
+ public:
+  GpuRasterizationPictureLayerImplTest()
+      : PictureLayerImplTest(GpuRasterizationSettings()) {}
+};
+
+TEST_F(GpuRasterizationPictureLayerImplTest, Tiling) {
+  gfx::Size default_tile_size(host_impl_.settings().default_tile_size);
+  gfx::Size layer_bounds(default_tile_size.width() * 4,
+                         default_tile_size.height() * 4);
+  float result_scale_x, result_scale_y;
+  gfx::Size result_bounds;
+
+  SetupDefaultTrees(layer_bounds);
+  pending_layer_->SetHasGpuRasterizationHint(true);
+  EXPECT_TRUE(pending_layer_->ShouldUseGpuRasterization());
+  EXPECT_EQ(0u, pending_layer_->tilings()->num_tilings());
+  pending_layer_->CalculateContentsScale(
+      1.f, 1.f, 1.f, false, &result_scale_x, &result_scale_y, &result_bounds);
+  // Should only have the high-res tiling.
+  ASSERT_EQ(1u, pending_layer_->tilings()->num_tilings());
+
+  pending_layer_->SetHasGpuRasterizationHint(false);
+  EXPECT_TRUE(pending_layer_->ShouldUseGpuRasterization());
+  // Should still have the high-res tiling.
+  EXPECT_EQ(1u, pending_layer_->tilings()->num_tilings());
+  pending_layer_->CalculateContentsScale(
+      1.f, 1.f, 1.f, false, &result_scale_x, &result_scale_y, &result_bounds);
+  // Should still only have the high-res tiling.
+  ASSERT_EQ(1u, pending_layer_->tilings()->num_tilings());
+}
+
 }  // namespace
 }  // namespace cc