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                                 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 void ContentLayer::ClearClient() {
  49   client_ = NULL;
  50   UpdateDrawsContent(HasDrawableContent());
  51 }
  52
  53 bool ContentLayer::HasDrawableContent() const {
  54   return client_ && TiledLayer::HasDrawableContent();
  55 }
  56
  57 void ContentLayer::SetLayerTreeHost(LayerTreeHost* host) {
  58   TiledLayer::SetLayerTreeHost(host);
  59
  60   if (!updater_.get())
  61     return;
  62
  63   if (host) {
  64     updater_->set_rendering_stats_instrumentation(
  65         host->rendering_stats_instrumentation());
  66   } else {
  67     updater_->set_rendering_stats_instrumentation(NULL);
  68   }
  69 }
  70
  71 void ContentLayer::SetTexturePriorities(
  72     const PriorityCalculator& priority_calc) {
  73   // Update the tile data before creating all the layer's tiles.
  74   UpdateTileSizeAndTilingOption();
  75
  76   TiledLayer::SetTexturePriorities(priority_calc);
  77 }
  78
  79 bool ContentLayer::Update(ResourceUpdateQueue* queue,
  80                           const OcclusionTracker<Layer>* occlusion) {
  81   {
  82     base::AutoReset<bool> ignore_set_needs_commit(&ignore_set_needs_commit_,
  83                                                   true);
  84
  85     CreateUpdaterIfNeeded();
  86     UpdateCanUseLCDText();
  87   }
  88
  89   bool updated = TiledLayer::Update(queue, occlusion);
  90   return updated;
  91 }
  92
  93 bool ContentLayer::NeedMoreUpdates() {
  94   return NeedsIdlePaint();
  95 }
  96
  97 LayerUpdater* ContentLayer::Updater() const {
  98   return updater_.get();
  99 }
 100
 101 void ContentLayer::CreateUpdaterIfNeeded() {
 102   if (updater_.get())
 103     return;
 104   scoped_ptr<LayerPainter> painter =
 105       ContentLayerPainter::Create(client_).PassAs<LayerPainter>();
 106   if (layer_tree_host()->settings().per_tile_painting_enabled) {
 107     updater_ = BitmapSkPictureContentLayerUpdater::Create(
 108         painter.Pass(),
 109         rendering_stats_instrumentation(),
 110         id());
 111   } else {
 112     updater_ = BitmapContentLayerUpdater::Create(
 113         painter.Pass(),
 114         rendering_stats_instrumentation(),
 115         id());
 116   }
 117   updater_->SetOpaque(contents_opaque());
 118   if (client_)
 119     updater_->SetFillsBoundsCompletely(client_->FillsBoundsCompletely());
 120
 121   SetTextureFormat(
 122       layer_tree_host()->GetRendererCapabilities().best_texture_format);
 123 }
 124
 125 void ContentLayer::SetContentsOpaque(bool opaque) {
 126   Layer::SetContentsOpaque(opaque);
 127   if (updater_.get())
 128     updater_->SetOpaque(opaque);
 129 }
 130
 131 void ContentLayer::UpdateCanUseLCDText() {
 132   if (can_use_lcd_text_last_frame_ == can_use_lcd_text())
 133     return;
 134
 135   can_use_lcd_text_last_frame_ = can_use_lcd_text();
 136   if (client_)
 137     client_->DidChangeLayerCanUseLCDText();
 138 }
 139
 140 bool ContentLayer::SupportsLCDText() const {
 141   return true;
 142 }
 143
 144 skia::RefPtr<SkPicture> ContentLayer::GetPicture() const {
 145   if (!DrawsContent())
 146     return skia::RefPtr<SkPicture>();
 147
 148   int width = bounds().width();
 149   int height = bounds().height();
 150   gfx::RectF opaque;
 151
 152   SkPictureRecorder recorder;
 153   SkCanvas* canvas = recorder.beginRecording(width, height, NULL, 0);
 154   client_->PaintContents(canvas,
 155                          gfx::Rect(width, height),
 156                          &opaque,
 157                          ContentLayerClient::GRAPHICS_CONTEXT_ENABLED);
 158   skia::RefPtr<SkPicture> picture = skia::AdoptRef(recorder.endRecording());
 159   return picture;
 160 }
 161
 162 void ContentLayer::OnOutputSurfaceCreated() {
 163   SetTextureFormat(
 164       layer_tree_host()->GetRendererCapabilities().best_texture_format);
 165   TiledLayer::OnOutputSurfaceCreated();
 166 }
 167
 168 }  // namespace cc