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
21HeadsUpDisplayLayer::~HeadsUpDisplayLayer() {}
22
23void HeadsUpDisplayLayer::PrepareForCalculateDrawProperties(
24    gfx::Size device_viewport, float device_scale_factor) {
25  gfx::Size device_viewport_in_layout_pixels = gfx::Size(
26      device_viewport.width() / device_scale_factor,
27      device_viewport.height() / device_scale_factor);
28
29  gfx::Size bounds;
30  gfx::Transform matrix;
31  matrix.MakeIdentity();
32
33  if (layer_tree_host()->debug_state().ShowHudRects()) {
34    int max_texture_size =
35        layer_tree_host()->GetRendererCapabilities().max_texture_size;
36    bounds.SetSize(std::min(max_texture_size,
37                            device_viewport_in_layout_pixels.width()),
38                   std::min(max_texture_size,
39                            device_viewport_in_layout_pixels.height()));
40  } else {
41    int size = 256;
42    bounds.SetSize(size, size);
43    matrix.Translate(device_viewport_in_layout_pixels.width() - size, 0.0);
44  }
45
46  SetBounds(bounds);
47  SetTransform(matrix);
48}
49
50bool HeadsUpDisplayLayer::DrawsContent() const { return true; }
51
52scoped_ptr<LayerImpl> HeadsUpDisplayLayer::CreateLayerImpl(
53    LayerTreeImpl* tree_impl) {
54  return HeadsUpDisplayLayerImpl::Create(tree_impl, layer_id_).
55      PassAs<LayerImpl>();
56}
57
58std::string HeadsUpDisplayLayer::DebugName() {
59  return std::string("Heads Up Display Layer");
60}
61
62}  // namespace cc
63