Add a flag to disable partial raster in renderer

cc/tiles/picture_layer_tiling_unittest.cc

Index: cc/tiles/picture_layer_tiling_unittest.cc
diff --git a/cc/tiles/picture_layer_tiling_unittest.cc b/cc/tiles/picture_layer_tiling_unittest.cc
index ec3b87024d78931c0df77bd8fef84c3b76646fd1..2c0cf7b8d6a8d6494670fc2dce35428f551c11a2 100644
--- a/cc/tiles/picture_layer_tiling_unittest.cc
+++ b/cc/tiles/picture_layer_tiling_unittest.cc
@@ -1796,5 +1796,161 @@ TEST_F(PictureLayerTilingIteratorTest, GiantRect) {
   VerifyTilesExactlyCoverRect(contents_scale, content_rect);
 }
 
+// Invalidates a tiling and ensures that if partial raster is enabled, the
+// tiling provides tiles with an invalidated id.
+TEST_F(PictureLayerTilingIteratorTest, InvalidateRespectsEnabledPartialRaster) {
+  gfx::Size tile_size(100, 100);
+  gfx::Size original_layer_size(10, 10);
+  client_.SetTileSize(tile_size);
+  client_.set_partial_raster_enabled(true);
+  LayerTreeSettings settings;
+  settings.use_partial_raster = true;
+
+  scoped_refptr<FakeDisplayListRasterSource> raster_source =
+      FakeDisplayListRasterSource::CreateFilled(original_layer_size);
+  tiling_ = TestablePictureLayerTiling::Create(ACTIVE_TREE, 1.f, raster_source,
+                                               &client_, settings);
+  tiling_->set_resolution(HIGH_RESOLUTION);
+  SetLiveRectAndVerifyTiles(gfx::Rect(original_layer_size));
+
+  // Tiling only has one tile, since its total size is less than one.
+  Tile::Id original_id = tiling_->TileAt(0, 0)->id();
+  EXPECT_NE(0u, original_id);
+  EXPECT_EQ(0u, tiling_->TileAt(0, 0)->invalidated_id());
+
+  Region invalidation =
+      SubtractRegions(gfx::Rect(tile_size), gfx::Rect(original_layer_size));
+  tiling_->Invalidate(invalidation);
+  EXPECT_EQ(original_id, tiling_->TileAt(0, 0)->invalidated_id());
+}
+
+// Invalidates a tiling and ensures that if partial raster is disabled, the
+// tiling does not provide tiles with an invalidated id.
+TEST_F(PictureLayerTilingIteratorTest,
+       InvalidateRespectsDisabledPartialRaster) {
+  gfx::Size tile_size(100, 100);
+  gfx::Size original_layer_size(10, 10);
+  client_.SetTileSize(tile_size);
+  scoped_refptr<FakeDisplayListRasterSource> raster_source =
+      FakeDisplayListRasterSource::CreateFilled(original_layer_size);
+  tiling_ = TestablePictureLayerTiling::Create(ACTIVE_TREE, 1.f, raster_source,
+                                               &client_, LayerTreeSettings());
+  tiling_->set_resolution(HIGH_RESOLUTION);
+  SetLiveRectAndVerifyTiles(gfx::Rect(original_layer_size));
+
+  // Tiling only has one tile, since its total size is less than one.
+  EXPECT_NE(0u, tiling_->TileAt(0, 0)->id());
+  EXPECT_EQ(0u, tiling_->TileAt(0, 0)->invalidated_id());
+
+  Region invalidation =
+      SubtractRegions(gfx::Rect(tile_size), gfx::Rect(original_layer_size));
+  tiling_->Invalidate(invalidation);
+  EXPECT_EQ(0u, tiling_->TileAt(0, 0)->invalidated_id());
+}
+
+// Ensures that if partial raster is enabled, we copy the tile ids from the
+// active tiling to the invalidated ids of any new tiles created by
+// CreateMissingTilesInLiveTilesRect.
+TEST_F(PictureLayerTilingIteratorTest,
+       CreateMissingRespectsEnabledPartialRaster) {
+  gfx::Size tile_size(100, 100);
+  gfx::Size original_layer_size(10, 10);
+  LayerTreeSettings settings;
+  settings.use_partial_raster = true;
+  Region invalidation =
+      SubtractRegions(gfx::Rect(tile_size), gfx::Rect(original_layer_size));
+  scoped_refptr<FakeDisplayListRasterSource> empty_raster_source =
+      FakeDisplayListRasterSource::CreatePartiallyFilled(original_layer_size,
+                                                         gfx::Rect());
+  scoped_refptr<FakeDisplayListRasterSource> filled_raster_source =
+      FakeDisplayListRasterSource::CreateFilled(original_layer_size);
+
+  // Set up the client.
+  client_.SetTileSize(tile_size);
+  client_.set_partial_raster_enabled(settings.use_partial_raster);
+  client_.set_invalidation(invalidation);
+
+  // Create a twin tiling based on the filled raster source and set it to the
+  // client.
+  scoped_ptr<TestablePictureLayerTiling> twin_tiling =
+      TestablePictureLayerTiling::Create(ACTIVE_TREE, 1.f, filled_raster_source,
+                                         &client_, settings);
+  twin_tiling->set_resolution(HIGH_RESOLUTION);
+  twin_tiling->SetLiveTilesRect(gfx::Rect(original_layer_size));
+  client_.set_twin_tiling(twin_tiling.get());
+
+  // The twin tiling should have a valid tile at 0,0.
+  Tile::Id original_tile_id = twin_tiling->TileAt(0, 0)->id();
+  DCHECK_NE(0u, original_tile_id);
+
+  // Crate an empty tiling which will have CreateMissingTilesInLiveTilesRect
+  // called on it.
+  scoped_ptr<TestablePictureLayerTiling> empty_tiling =
+      TestablePictureLayerTiling::Create(PENDING_TREE, 1.f, empty_raster_source,
+                                         &client_, settings);
+  empty_tiling->set_resolution(HIGH_RESOLUTION);
+  empty_tiling->SetLiveTilesRect(gfx::Rect(original_layer_size));
+  EXPECT_EQ(nullptr, empty_tiling->TileAt(0, 0));
+
+  // Now update the |empty_tiling|'s raster source to the filled source, so
+  // that it will attempt to create tiles when CreateMissingTilesInLiveTilesRect
+  // is called.
+  empty_tiling->SetRasterSourceAndResize(filled_raster_source);
+
+  empty_tiling->CreateMissingTilesInLiveTilesRect();
+  EXPECT_EQ(original_tile_id, empty_tiling->TileAt(0, 0)->invalidated_id());
+}
+
+// Ensures that if partial raster is disavbled, we do not set invalidated ids on
+// any new tiles created by CreateMissingTilesInLiveTilesRect.
+TEST_F(PictureLayerTilingIteratorTest,
+       CreateMissingRespectsDisabledPartialRaster) {
+  gfx::Size tile_size(100, 100);
+  gfx::Size original_layer_size(10, 10);
+  LayerTreeSettings settings;
+  settings.use_partial_raster = false;
+  Region invalidation =
+      SubtractRegions(gfx::Rect(tile_size), gfx::Rect(original_layer_size));
+  scoped_refptr<FakeDisplayListRasterSource> empty_raster_source =
+      FakeDisplayListRasterSource::CreatePartiallyFilled(original_layer_size,
+                                                         gfx::Rect());
+  scoped_refptr<FakeDisplayListRasterSource> filled_raster_source =
+      FakeDisplayListRasterSource::CreateFilled(original_layer_size);
+
+  // Set up the client.
+  client_.SetTileSize(tile_size);
+  client_.set_partial_raster_enabled(settings.use_partial_raster);
+  client_.set_invalidation(invalidation);
+
+  // Create a twin tiling based on the filled raster source and set it to the
+  // client.
+  scoped_ptr<TestablePictureLayerTiling> twin_tiling =
+      TestablePictureLayerTiling::Create(ACTIVE_TREE, 1.f, filled_raster_source,
+                                         &client_, settings);
+  twin_tiling->set_resolution(HIGH_RESOLUTION);
+  twin_tiling->SetLiveTilesRect(gfx::Rect(original_layer_size));
+  client_.set_twin_tiling(twin_tiling.get());
+
+  // The twin tiling should have a valid tile at 0,0.
+  DCHECK_NE(0u, twin_tiling->TileAt(0, 0)->id());
+
+  // Crate an empty tiling which will have CreateMissingTilesInLiveTilesRect
+  // called on it.
+  scoped_ptr<TestablePictureLayerTiling> empty_tiling =
+      TestablePictureLayerTiling::Create(PENDING_TREE, 1.f, empty_raster_source,
+                                         &client_, settings);
+  empty_tiling->set_resolution(HIGH_RESOLUTION);
+  empty_tiling->SetLiveTilesRect(gfx::Rect(original_layer_size));
+  EXPECT_EQ(nullptr, empty_tiling->TileAt(0, 0));
+
+  // Now update the |empty_tiling|'s raster source to the filled source, so
+  // that it will attempt to create tiles when CreateMissingTilesInLiveTilesRect
+  // is called.
+  empty_tiling->SetRasterSourceAndResize(filled_raster_source);
+
+  empty_tiling->CreateMissingTilesInLiveTilesRect();
+  EXPECT_EQ(0u, empty_tiling->TileAt(0, 0)->invalidated_id());
+}
+
 }  // namespace
 }  // namespace cc