cc/layers/content_layer_unittest.cc

   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