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