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
15namespace cc {
16namespace {
17
18class MockContentLayerClient : public ContentLayerClient {
19 public:
20  explicit MockContentLayerClient(gfx::Rect opaque_layer_rect)
21      : opaque_layer_rect_(opaque_layer_rect) {}
22
23  virtual void PaintContents(SkCanvas* canvas,
24                             gfx::Rect clip,
25                             gfx::RectF* opaque) OVERRIDE {
26    *opaque = gfx::RectF(opaque_layer_rect_);
27  }
28  virtual void DidChangeLayerCanUseLCDText() OVERRIDE {}
29
30 private:
31  gfx::Rect opaque_layer_rect_;
32};
33
34TEST(ContentLayerTest, ContentLayerPainterWithDeviceScale) {
35  float contents_scale = 2.f;
36  gfx::Rect content_rect(10, 10, 100, 100);
37  gfx::Rect opaque_rect_in_layer_space(5, 5, 20, 20);
38  gfx::Rect opaque_rect_in_content_space = gfx::ScaleToEnclosingRect(
39      opaque_rect_in_layer_space, contents_scale, contents_scale);
40  MockContentLayerClient client(opaque_rect_in_layer_space);
41  FakeRenderingStatsInstrumentation stats_instrumentation;
42  scoped_refptr<BitmapContentLayerUpdater> updater =
43      BitmapContentLayerUpdater::Create(
44          ContentLayerPainter::Create(&client).PassAs<LayerPainter>(),
45          &stats_instrumentation,
46          0);
47
48  gfx::Rect resulting_opaque_rect;
49  updater->PrepareToUpdate(content_rect,
50                           gfx::Size(256, 256),
51                           contents_scale,
52                           contents_scale,
53                           &resulting_opaque_rect);
54
55  EXPECT_EQ(opaque_rect_in_content_space.ToString(),
56            resulting_opaque_rect.ToString());
57}
58
59}  // namespace
60}  // namespace cc
61