cc/layers/content_layer.cc

   1 // Copyright 2010 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 "base/auto_reset.h"
   8 #include "base/metrics/histogram.h"
   9 #include "base/time/time.h"
  10 #include "cc/layers/content_layer_client.h"
  11 #include "cc/resources/bitmap_content_layer_updater.h"
  12 #include "cc/resources/bitmap_skpicture_content_layer_updater.h"
  13 #include "cc/resources/layer_painter.h"
  14 #include "cc/trees/layer_tree_host.h"
  15 #include "third_party/skia/include/core/SkPictureRecorder.h"
  16
  17 namespace cc {
  18
  19 ContentLayerPainter::ContentLayerPainter(ContentLayerClient* client)
  20     : client_(client) {}
  21
  22 scoped_ptr<ContentLayerPainter> ContentLayerPainter::Create(
  23     ContentLayerClient* client) {
  24   return make_scoped_ptr(new ContentLayerPainter(client));
  25 }
  26
  27 void ContentLayerPainter::Paint(SkCanvas* canvas,
  28                                 const gfx::Rect& content_rect) {
  29   client_->PaintContents(canvas, content_rect,
  30                          ContentLayerClient::PAINTING_BEHAVIOR_NORMAL);
  31 }
  32
  33 scoped_refptr<ContentLayer> ContentLayer::Create(ContentLayerClient* client) {
  34   return make_scoped_refptr(new ContentLayer(client));
  35 }
  36
  37 ContentLayer::ContentLayer(ContentLayerClient* client)
  38     : TiledLayer(), client_(client) {
  39 }
  40
  41 ContentLayer::~ContentLayer() {}
  42
  43 void ContentLayer::ClearClient() {
  44   client_ = nullptr;
  45   UpdateDrawsContent(HasDrawableContent());
  46 }
  47
  48 bool ContentLayer::HasDrawableContent() const {
  49   return client_ && TiledLayer::HasDrawableContent();
  50 }
  51
  52 void ContentLayer::SetLayerTreeHost(LayerTreeHost* host) {
  53   TiledLayer::SetLayerTreeHost(host);
  54
  55   if (!updater_.get())
  56     return;
  57 }
  58
  59 void ContentLayer::SetTexturePriorities(
  60     const PriorityCalculator& priority_calc) {
  61   // Update the tile data before creating all the layer's tiles.
  62   UpdateTileSizeAndTilingOption();
  63
  64   TiledLayer::SetTexturePriorities(priority_calc);
  65 }
  66
  67 bool ContentLayer::Update(ResourceUpdateQueue* queue,
  68                           const OcclusionTracker<Layer>* occlusion) {
  69   {
  70     base::AutoReset<bool> ignore_set_needs_commit(&ignore_set_needs_commit_,
  71                                                   true);
  72
  73     CreateUpdaterIfNeeded();
  74   }
  75
  76   bool updated = TiledLayer::Update(queue, occlusion);
  77   return updated;
  78 }
  79
  80 bool ContentLayer::NeedMoreUpdates() {
  81   return NeedsIdlePaint();
  82 }
  83
  84 LayerUpdater* ContentLayer::Updater() const {
  85   return updater_.get();
  86 }
  87
  88 void ContentLayer::CreateUpdaterIfNeeded() {
  89   if (updater_.get())
  90     return;
  91   scoped_ptr<LayerPainter> painter = ContentLayerPainter::Create(client_);
  92   if (layer_tree_host()->settings().per_tile_painting_enabled) {
  93     updater_ = BitmapSkPictureContentLayerUpdater::Create(
  94         painter.Pass(),
  95         rendering_stats_instrumentation(),
  96         id());
  97   } else {
  98     updater_ = BitmapContentLayerUpdater::Create(
  99         painter.Pass(),
 100         id());
 101   }
 102   updater_->SetOpaque(contents_opaque());
 103   if (client_)
 104     updater_->SetFillsBoundsCompletely(client_->FillsBoundsCompletely());
 105   updater_->SetBackgroundColor(background_color());
 106
 107   SetTextureFormat(
 108       layer_tree_host()->GetRendererCapabilities().best_texture_format);
 109 }
 110
 111 void ContentLayer::SetContentsOpaque(bool opaque) {
 112   Layer::SetContentsOpaque(opaque);
 113   if (updater_.get())
 114     updater_->SetOpaque(opaque);
 115 }
 116
 117 bool ContentLayer::SupportsLCDText() const {
 118   return true;
 119 }
 120
 121 skia::RefPtr<SkPicture> ContentLayer::GetPicture() const {
 122   if (!DrawsContent())
 123     return skia::RefPtr<SkPicture>();
 124
 125   int width = bounds().width();
 126   int height = bounds().height();
 127
 128   SkPictureRecorder recorder;
 129   SkCanvas* canvas = recorder.beginRecording(width, height, nullptr, 0);
 130   client_->PaintContents(canvas, gfx::Rect(width, height),
 131                          ContentLayerClient::PAINTING_BEHAVIOR_NORMAL);
 132   skia::RefPtr<SkPicture> picture = skia::AdoptRef(recorder.endRecording());
 133   return picture;
 134 }
 135
 136 void ContentLayer::OnOutputSurfaceCreated() {
 137   SetTextureFormat(
 138       layer_tree_host()->GetRendererCapabilities().best_texture_format);
 139   TiledLayer::OnOutputSurfaceCreated();
 140 }
 141
 142 }  // namespace cc