src/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,
  30                          content_rect,
  31                          ContentLayerClient::GRAPHICS_CONTEXT_ENABLED);
  32 }
  33
  34 scoped_refptr<ContentLayer> ContentLayer::Create(ContentLayerClient* client) {
  35   return make_scoped_refptr(new ContentLayer(client));
  36 }
  37
  38 ContentLayer::ContentLayer(ContentLayerClient* client)
  39     : TiledLayer(),
  40       client_(client),
  41       can_use_lcd_text_last_frame_(can_use_lcd_text()) {
  42 }
  43
  44 ContentLayer::~ContentLayer() {}
  45
  46 void ContentLayer::ClearClient() {
  47   client_ = NULL;
  48   UpdateDrawsContent(HasDrawableContent());
  49 }
  50
  51 bool ContentLayer::HasDrawableContent() const {
  52   return client_ && TiledLayer::HasDrawableContent();
  53 }
  54
  55 void ContentLayer::SetLayerTreeHost(LayerTreeHost* host) {
  56   TiledLayer::SetLayerTreeHost(host);
  57
  58   if (!updater_.get())
  59     return;
  60
  61   if (host) {
  62     updater_->set_rendering_stats_instrumentation(
  63         host->rendering_stats_instrumentation());
  64   } else {
  65     updater_->set_rendering_stats_instrumentation(NULL);
  66   }
  67 }
  68
  69 void ContentLayer::SetTexturePriorities(
  70     const PriorityCalculator& priority_calc) {
  71   // Update the tile data before creating all the layer's tiles.
  72   UpdateTileSizeAndTilingOption();
  73
  74   TiledLayer::SetTexturePriorities(priority_calc);
  75 }
  76
  77 bool ContentLayer::Update(ResourceUpdateQueue* queue,
  78                           const OcclusionTracker<Layer>* occlusion) {
  79   {
  80     base::AutoReset<bool> ignore_set_needs_commit(&ignore_set_needs_commit_,
  81                                                   true);
  82
  83     CreateUpdaterIfNeeded();
  84     UpdateCanUseLCDText();
  85   }
  86
  87   bool updated = TiledLayer::Update(queue, occlusion);
  88   return updated;
  89 }
  90
  91 bool ContentLayer::NeedMoreUpdates() {
  92   return NeedsIdlePaint();
  93 }
  94
  95 LayerUpdater* ContentLayer::Updater() const {
  96   return updater_.get();
  97 }
  98
  99 void ContentLayer::CreateUpdaterIfNeeded() {
 100   if (updater_.get())
 101     return;
 102   scoped_ptr<LayerPainter> painter =
 103       ContentLayerPainter::Create(client_).PassAs<LayerPainter>();
 104   if (layer_tree_host()->settings().per_tile_painting_enabled) {
 105     updater_ = BitmapSkPictureContentLayerUpdater::Create(
 106         painter.Pass(),
 107         rendering_stats_instrumentation(),
 108         id());
 109   } else {
 110     updater_ = BitmapContentLayerUpdater::Create(
 111         painter.Pass(),
 112         rendering_stats_instrumentation(),
 113         id());
 114   }
 115   updater_->SetOpaque(contents_opaque());
 116   if (client_)
 117     updater_->SetFillsBoundsCompletely(client_->FillsBoundsCompletely());
 118   updater_->SetBackgroundColor(background_color());
 119
 120   SetTextureFormat(
 121       layer_tree_host()->GetRendererCapabilities().best_texture_format);
 122 }
 123
 124 void ContentLayer::SetContentsOpaque(bool opaque) {
 125   Layer::SetContentsOpaque(opaque);
 126   if (updater_.get())
 127     updater_->SetOpaque(opaque);
 128 }
 129
 130 void ContentLayer::UpdateCanUseLCDText() {
 131   if (can_use_lcd_text_last_frame_ == can_use_lcd_text())
 132     return;
 133
 134   can_use_lcd_text_last_frame_ = can_use_lcd_text();
 135   if (client_)
 136     client_->DidChangeLayerCanUseLCDText();
 137 }
 138
 139 bool ContentLayer::SupportsLCDText() const {
 140   return true;
 141 }
 142
 143 skia::RefPtr<SkPicture> ContentLayer::GetPicture() const {
 144   if (!DrawsContent())
 145     return skia::RefPtr<SkPicture>();
 146
 147   int width = bounds().width();
 148   int height = bounds().height();
 149
 150   SkPictureRecorder recorder;
 151   SkCanvas* canvas = recorder.beginRecording(width, height, NULL, 0);
 152   client_->PaintContents(canvas,
 153                          gfx::Rect(width, height),
 154                          ContentLayerClient::GRAPHICS_CONTEXT_ENABLED);
 155   skia::RefPtr<SkPicture> picture = skia::AdoptRef(recorder.endRecording());
 156   return picture;
 157 }
 158
 159 void ContentLayer::OnOutputSurfaceCreated() {
 160   SetTextureFormat(
 161       layer_tree_host()->GetRendererCapabilities().best_texture_format);
 162   TiledLayer::OnOutputSurfaceCreated();
 163 }
 164
 165 }  // namespace cc