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                                 gfx::RectF* opaque) {
  30   client_->PaintContents(canvas,
  31                          content_rect,
  32                          opaque,
  33                          ContentLayerClient::GRAPHICS_CONTEXT_ENABLED);
  34 }
  35
  36 scoped_refptr<ContentLayer> ContentLayer::Create(ContentLayerClient* client) {
  37   return make_scoped_refptr(new ContentLayer(client));
  38 }
  39
  40 ContentLayer::ContentLayer(ContentLayerClient* client)
  41     : TiledLayer(),
  42       client_(client),
  43       can_use_lcd_text_last_frame_(can_use_lcd_text()) {
  44 }
  45
  46 ContentLayer::~ContentLayer() {}
  47
  48 bool ContentLayer::DrawsContent() const {
  49   return TiledLayer::DrawsContent() && client_;
  50 }
  51
  52 void ContentLayer::SetLayerTreeHost(LayerTreeHost* host) {
  53   TiledLayer::SetLayerTreeHost(host);
  54
  55   if (!updater_.get())
  56     return;
  57
  58   if (host) {
  59     updater_->set_rendering_stats_instrumentation(
  60         host->rendering_stats_instrumentation());
  61   } else {
  62     updater_->set_rendering_stats_instrumentation(NULL);
  63   }
  64 }
  65
  66 void ContentLayer::SetTexturePriorities(
  67     const PriorityCalculator& priority_calc) {
  68   // Update the tile data before creating all the layer's tiles.
  69   UpdateTileSizeAndTilingOption();
  70
  71   TiledLayer::SetTexturePriorities(priority_calc);
  72 }
  73
  74 bool ContentLayer::Update(ResourceUpdateQueue* queue,
  75                           const OcclusionTracker<Layer>* occlusion) {
  76   {
  77     base::AutoReset<bool> ignore_set_needs_commit(&ignore_set_needs_commit_,
  78                                                   true);
  79
  80     CreateUpdaterIfNeeded();
  81     UpdateCanUseLCDText();
  82   }
  83
  84   bool updated = TiledLayer::Update(queue, occlusion);
  85   return updated;
  86 }
  87
  88 bool ContentLayer::NeedMoreUpdates() {
  89   return NeedsIdlePaint();
  90 }
  91
  92 LayerUpdater* ContentLayer::Updater() const {
  93   return updater_.get();
  94 }
  95
  96 void ContentLayer::CreateUpdaterIfNeeded() {
  97   if (updater_.get())
  98     return;
  99   scoped_ptr<LayerPainter> painter =
 100       ContentLayerPainter::Create(client_).PassAs<LayerPainter>();
 101   if (layer_tree_host()->settings().per_tile_painting_enabled) {
 102     updater_ = BitmapSkPictureContentLayerUpdater::Create(
 103         painter.Pass(),
 104         rendering_stats_instrumentation(),
 105         id());
 106   } else {
 107     updater_ = BitmapContentLayerUpdater::Create(
 108         painter.Pass(),
 109         rendering_stats_instrumentation(),
 110         id());
 111   }
 112   updater_->SetOpaque(contents_opaque());
 113   if (client_)
 114     updater_->SetFillsBoundsCompletely(client_->FillsBoundsCompletely());
 115
 116   SetTextureFormat(
 117       layer_tree_host()->GetRendererCapabilities().best_texture_format);
 118 }
 119
 120 void ContentLayer::SetContentsOpaque(bool opaque) {
 121   Layer::SetContentsOpaque(opaque);
 122   if (updater_.get())
 123     updater_->SetOpaque(opaque);
 124 }
 125
 126 void ContentLayer::UpdateCanUseLCDText() {
 127   if (can_use_lcd_text_last_frame_ == can_use_lcd_text())
 128     return;
 129
 130   can_use_lcd_text_last_frame_ = can_use_lcd_text();
 131   if (client_)
 132     client_->DidChangeLayerCanUseLCDText();
 133 }
 134
 135 bool ContentLayer::SupportsLCDText() const {
 136   return true;
 137 }
 138
 139 skia::RefPtr<SkPicture> ContentLayer::GetPicture() const {
 140   if (!DrawsContent())
 141     return skia::RefPtr<SkPicture>();
 142
 143   int width = bounds().width();
 144   int height = bounds().height();
 145   gfx::RectF opaque;
 146
 147   SkPictureRecorder recorder;
 148   SkCanvas* canvas = recorder.beginRecording(width, height, NULL, 0);
 149   client_->PaintContents(canvas,
 150                          gfx::Rect(width, height),
 151                          &opaque,
 152                          ContentLayerClient::GRAPHICS_CONTEXT_ENABLED);
 153   skia::RefPtr<SkPicture> picture = skia::AdoptRef(recorder.endRecording());
 154   return picture;
 155 }
 156
 157 void ContentLayer::OnOutputSurfaceCreated() {
 158   SetTextureFormat(
 159       layer_tree_host()->GetRendererCapabilities().best_texture_format);
 160   TiledLayer::OnOutputSurfaceCreated();
 161 }
 162
 163 }  // namespace cc