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/heads_up_display_layer.h"
6
7#include <algorithm>
8
9#include "base/debug/trace_event.h"
10#include "cc/layers/heads_up_display_layer_impl.h"
11#include "cc/trees/layer_tree_host.h"
12
13namespace cc {
14
15scoped_refptr<HeadsUpDisplayLayer> HeadsUpDisplayLayer::Create() {
16  return make_scoped_refptr(new HeadsUpDisplayLayer());
17}
18
19HeadsUpDisplayLayer::HeadsUpDisplayLayer() {
20  SetIsDrawable(true);
21  UpdateDrawsContent(HasDrawableContent());
22}
23
24HeadsUpDisplayLayer::~HeadsUpDisplayLayer() {}
25
26void HeadsUpDisplayLayer::PrepareForCalculateDrawProperties(
27    const gfx::Size& device_viewport, float device_scale_factor) {
28  gfx::Size device_viewport_in_layout_pixels = gfx::Size(
29      device_viewport.width() / device_scale_factor,
30      device_viewport.height() / device_scale_factor);
31
32  gfx::Size bounds;
33  gfx::Transform matrix;
34  matrix.MakeIdentity();
35
36  if (layer_tree_host()->debug_state().ShowHudRects()) {
37    int max_texture_size =
38        layer_tree_host()->GetRendererCapabilities().max_texture_size;
39    bounds.SetSize(std::min(max_texture_size,
40                            device_viewport_in_layout_pixels.width()),
41                   std::min(max_texture_size,
42                            device_viewport_in_layout_pixels.height()));
43  } else {
44    int size = 256;
45    bounds.SetSize(size, size);
46    matrix.Translate(device_viewport_in_layout_pixels.width() - size, 0.0);
47  }
48
49  SetBounds(bounds);
50  SetTransform(matrix);
51}
52
53bool HeadsUpDisplayLayer::HasDrawableContent() const {
54  return true;
55}
56
57scoped_ptr<LayerImpl> HeadsUpDisplayLayer::CreateLayerImpl(
58    LayerTreeImpl* tree_impl) {
59  return HeadsUpDisplayLayerImpl::Create(tree_impl, layer_id_).
60      PassAs<LayerImpl>();
61}
62
63}  // namespace cc
64