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      1 // Copyright 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "cc/layers/content_layer.h"
      6 
      7 #include "cc/layers/content_layer_client.h"
      8 #include "cc/resources/bitmap_content_layer_updater.h"
      9 #include "cc/test/fake_rendering_stats_instrumentation.h"
     10 #include "cc/test/geometry_test_utils.h"
     11 #include "skia/ext/platform_canvas.h"
     12 #include "testing/gtest/include/gtest/gtest.h"
     13 #include "ui/gfx/rect_conversions.h"
     14 
     15 namespace cc {
     16 namespace {
     17 
     18 class MockContentLayerClient : public ContentLayerClient {
     19  public:
     20   explicit MockContentLayerClient(const gfx::Rect& opaque_layer_rect)
     21       : opaque_layer_rect_(opaque_layer_rect) {}
     22 
     23   virtual void PaintContents(
     24       SkCanvas* canvas,
     25       const gfx::Rect& clip,
     26       gfx::RectF* opaque,
     27       ContentLayerClient::GraphicsContextStatus gc_status) OVERRIDE {
     28     *opaque = gfx::RectF(opaque_layer_rect_);
     29   }
     30   virtual void DidChangeLayerCanUseLCDText() OVERRIDE {}
     31   virtual bool FillsBoundsCompletely() const OVERRIDE { return false; }
     32 
     33  private:
     34   gfx::Rect opaque_layer_rect_;
     35 };
     36 
     37 TEST(ContentLayerTest, ContentLayerPainterWithDeviceScale) {
     38   float contents_scale = 2.f;
     39   gfx::Rect content_rect(10, 10, 100, 100);
     40   gfx::Rect opaque_rect_in_layer_space(5, 5, 20, 20);
     41   gfx::Rect opaque_rect_in_content_space = gfx::ScaleToEnclosingRect(
     42       opaque_rect_in_layer_space, contents_scale, contents_scale);
     43   MockContentLayerClient client(opaque_rect_in_layer_space);
     44   FakeRenderingStatsInstrumentation stats_instrumentation;
     45   scoped_refptr<BitmapContentLayerUpdater> updater =
     46       BitmapContentLayerUpdater::Create(
     47           ContentLayerPainter::Create(&client).PassAs<LayerPainter>(),
     48           &stats_instrumentation,
     49           0);
     50 
     51   gfx::Rect resulting_opaque_rect;
     52   updater->PrepareToUpdate(content_rect,
     53                            gfx::Size(256, 256),
     54                            contents_scale,
     55                            contents_scale,
     56                            &resulting_opaque_rect);
     57 
     58   EXPECT_EQ(opaque_rect_in_content_space.ToString(),
     59             resulting_opaque_rect.ToString());
     60 }
     61 
     62 }  // namespace
     63 }  // namespace cc
     64