src/cc/layers/heads_up_display_layer.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/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
  13 namespace cc {
  14
  15 scoped_refptr<HeadsUpDisplayLayer> HeadsUpDisplayLayer::Create() {
  16   return make_scoped_refptr(new HeadsUpDisplayLayer());
  17 }
  18
  19 HeadsUpDisplayLayer::HeadsUpDisplayLayer() {}
  20
  21 HeadsUpDisplayLayer::~HeadsUpDisplayLayer() {}
  22
  23 void HeadsUpDisplayLayer::PrepareForCalculateDrawProperties(
  24     const 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
  50 bool HeadsUpDisplayLayer::DrawsContent() const { return true; }
  51
  52 scoped_ptr<LayerImpl> HeadsUpDisplayLayer::CreateLayerImpl(
  53     LayerTreeImpl* tree_impl) {
  54   return HeadsUpDisplayLayerImpl::Create(tree_impl, layer_id_).
  55       PassAs<LayerImpl>();
  56 }
  57
  58 }  // namespace cc