cc: Partial tile update for one-copy raster.

cc/trees/layer_tree_host_pixeltest_tiles.cc

+// Copyright 2015 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/content_layer_client.h"
+#include "cc/layers/picture_layer.h"
+#include "cc/output/copy_output_request.h"
+#include "cc/playback/display_item_list.h"
+#include "cc/playback/drawing_display_item.h"
+#include "cc/test/layer_tree_pixel_test.h"
+#include "cc/test/test_gpu_memory_buffer_manager.h"
+#include "third_party/skia/include/core/SkCanvas.h"
+#include "third_party/skia/include/core/SkPictureRecorder.h"
+
+#if !defined(OS_ANDROID)
+
+namespace cc {
+namespace {
+
+enum RasterMode {
+  PARTIAL_ONE_COPY,
+  FULL_ONE_COPY,
+};
+
+class LayerTreeHostTilesPixelTest : public LayerTreePixelTest {
+ protected:
+  void InitializeSettings(LayerTreeSettings* settings) override {
+    LayerTreePixelTest::InitializeSettings(settings);
+    settings->use_display_lists = true;
+    switch (raster_mode_) {
+      case PARTIAL_ONE_COPY:
+        settings->use_one_copy = true;
+        settings->use_zero_copy = false;
+        settings->have_persistent_gpu_memory_buffers = true;
+        break;
+      case FULL_ONE_COPY:
+        settings->use_one_copy = true;
+        settings->use_zero_copy = false;
+        settings->have_persistent_gpu_memory_buffers = false;
+        break;
+    }
+  }
+
+  void BeginTest() override {
+    // Don't set up a readback target at the start of the test.
+    PostSetNeedsCommitToMainThread();
+  }
+
+  void DoReadback() {
+    Layer* target =
+        readback_target_ ? readback_target_ : layer_tree_host()->root_layer();
+    target->RequestCopyOfOutput(CreateCopyOutputRequest().Pass());
+  }
+
+  void RunRasterPixelTest(bool threaded,
+                          RasterMode mode,
+                          scoped_refptr<Layer> content_root,
+                          base::FilePath file_name) {
+    raster_mode_ = mode;
+
+    PixelTestType test_type;
+    switch (mode) {
+      case PARTIAL_ONE_COPY:
+      case FULL_ONE_COPY:
+        test_type = PIXEL_TEST_GL;
+        break;
+    }
+
+    if (threaded)
+      RunPixelTest(test_type, content_root, file_name);
+    else
+      RunSingleThreadedPixelTest(test_type, content_root, file_name);
+  }
+
+  base::FilePath ref_file_;
+  scoped_ptr<SkBitmap> result_bitmap_;
+  RasterMode raster_mode_;
+};
+
+class BlueYellowClient : public ContentLayerClient {
+ public:
+  explicit BlueYellowClient(const gfx::Size& size)
+      : size_(size), blue_top_(true) {}
+
+  void PaintContents(SkCanvas* canvas,
+                     const gfx::Rect& clip,
+                     PaintingControlSetting painting_status) override {}
+
+  void PaintContentsToDisplayList(
+      DisplayItemList* display_list,
+      const gfx::Rect& clip,
+      PaintingControlSetting painting_status) override {
+    SkPictureRecorder recorder;
+    skia::RefPtr<SkCanvas> canvas = skia::SharePtr(
+        recorder.beginRecording(gfx::RectToSkRect(gfx::Rect(size_))));
+    gfx::Rect top(0, 0, size_.width(), size_.height() / 2);
+    gfx::Rect bottom(0, size_.height() / 2, size_.width(), size_.height() / 2);
+
+    gfx::Rect blue_rect = blue_top_ ? top : bottom;
+    gfx::Rect yellow_rect = blue_top_ ? bottom : top;
+
+    SkPaint paint;
+    paint.setStyle(SkPaint::kFill_Style);
+
+    paint.setColor(SK_ColorBLUE);
+    canvas->drawRect(gfx::RectToSkRect(blue_rect), paint);
+    paint.setColor(SK_ColorYELLOW);
+    canvas->drawRect(gfx::RectToSkRect(yellow_rect), paint);
+
+    skia::RefPtr<SkPicture> picture =
+        skia::AdoptRef(recorder.endRecordingAsPicture());
+
+    auto* item = display_list->CreateAndAppendItem<DrawingDisplayItem>();
+    item->SetNew(picture.Pass());
+  }
+
+  bool FillsBoundsCompletely() const override { return true; }
+
+  void set_blue_top(bool b) { blue_top_ = b; }
+
+ private:
+  gfx::Size size_;
+  bool blue_top_;
+};
+
+class LayerTreeHostTilesTestPartialInvalidation
+    : public LayerTreeHostTilesPixelTest {
+ public:
+  LayerTreeHostTilesTestPartialInvalidation()
+      : client_(gfx::Size(200, 200)),
+        picture_layer_(PictureLayer::Create(&client_)) {
+    picture_layer_->SetBounds(gfx::Size(200, 200));
+    picture_layer_->SetIsDrawable(true);
+  }
+
+  void DidCommitAndDrawFrame() override {
+    switch (layer_tree_host()->source_frame_number()) {
+      case 1:
+        // We have done one frame, so the layer's content has been rastered.
+        // Now we change the picture behind it to record something completely
+        // different, but we give a smaller invalidation rect. The layer should
+        // only re-raster the stuff in the rect. If it doesn't do partial raster
+        // it would re-raster the whole thing instead.
+        client_.set_blue_top(false);
+        picture_layer_->SetNeedsDisplayRect(gfx::Rect(50, 50, 100, 100));
+
+        // Add a copy request to see what happened!
+        DoReadback();
+        break;
+    }
+  }
+
+ protected:
+  BlueYellowClient client_;
+  scoped_refptr<PictureLayer> picture_layer_;
+};
+
+TEST_F(LayerTreeHostTilesTestPartialInvalidation,
+       PartialRaster_SingleThread_OneCopy) {
+  RunRasterPixelTest(
+      false, PARTIAL_ONE_COPY, picture_layer_,
+      base::FilePath(FILE_PATH_LITERAL("blue_yellow_partial_flipped.png")));
+}
+
+TEST_F(LayerTreeHostTilesTestPartialInvalidation,
+       FullRaster_SingleThread_OneCopy) {
+  RunRasterPixelTest(
+      false, FULL_ONE_COPY, picture_layer_,
+      base::FilePath(FILE_PATH_LITERAL("blue_yellow_flipped.png")));
+}
+
+TEST_F(LayerTreeHostTilesTestPartialInvalidation,
+       FullRaster_MultiThread_OneCopy) {
+  RunRasterPixelTest(
+      true, FULL_ONE_COPY, picture_layer_,
+      base::FilePath(FILE_PATH_LITERAL("blue_yellow_flipped.png")));
+}
+
+}  // namespace
+}  // namespace cc
+
+#endif  // !defined(OS_ANDROID)