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