src/webkit/renderer/compositor_bindings/web_content_layer_impl.cc

   1 // Copyright 2011 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 "webkit/renderer/compositor_bindings/web_content_layer_impl.h"
   6
   7 #include "cc/layers/content_layer.h"
   8 #include "cc/layers/picture_layer.h"
   9 #include "third_party/WebKit/public/platform/WebContentLayerClient.h"
  10 #include "third_party/WebKit/public/platform/WebFloatPoint.h"
  11 #include "third_party/WebKit/public/platform/WebFloatRect.h"
  12 #include "third_party/WebKit/public/platform/WebRect.h"
  13 #include "third_party/WebKit/public/platform/WebSize.h"
  14 #include "third_party/skia/include/utils/SkMatrix44.h"
  15
  16 using cc::ContentLayer;
  17 using cc::PictureLayer;
  18
  19 namespace webkit {
  20
  21 WebContentLayerImpl::WebContentLayerImpl(blink::WebContentLayerClient* client)
  22     : client_(client),
  23       ignore_lcd_text_change_(false) {
  24   if (WebLayerImpl::UsingPictureLayer())
  25     layer_ = make_scoped_ptr(new WebLayerImpl(PictureLayer::Create(this)));
  26   else
  27     layer_ = make_scoped_ptr(new WebLayerImpl(ContentLayer::Create(this)));
  28   layer_->layer()->SetIsDrawable(true);
  29   can_use_lcd_text_ = layer_->layer()->can_use_lcd_text();
  30 }
  31
  32 WebContentLayerImpl::~WebContentLayerImpl() {
  33   if (WebLayerImpl::UsingPictureLayer())
  34     static_cast<PictureLayer*>(layer_->layer())->ClearClient();
  35   else
  36     static_cast<ContentLayer*>(layer_->layer())->ClearClient();
  37 }
  38
  39 blink::WebLayer* WebContentLayerImpl::layer() { return layer_.get(); }
  40
  41 void WebContentLayerImpl::setDoubleSided(bool double_sided) {
  42   layer_->layer()->SetDoubleSided(double_sided);
  43 }
  44
  45 void WebContentLayerImpl::setDrawCheckerboardForMissingTiles(bool enable) {
  46   layer_->layer()->SetDrawCheckerboardForMissingTiles(enable);
  47 }
  48
  49 void WebContentLayerImpl::setHasGpuRasterizationHint(bool has_hint) {
  50   if (WebLayerImpl::UsingPictureLayer()) {
  51     static_cast<PictureLayer*>(layer_->layer())
  52         ->SetHasGpuRasterizationHint(has_hint);
  53   }
  54 }
  55
  56 void WebContentLayerImpl::PaintContents(SkCanvas* canvas,
  57                                         const gfx::Rect& clip,
  58                                         gfx::RectF* opaque) {
  59   if (!client_)
  60     return;
  61
  62   blink::WebFloatRect web_opaque;
  63   // For picture layers, always record with LCD text.  PictureLayerImpl
  64   // will turn this off later during rasterization.
  65   bool use_lcd_text = WebLayerImpl::UsingPictureLayer() || can_use_lcd_text_;
  66   client_->paintContents(canvas, clip, use_lcd_text, web_opaque);
  67   *opaque = web_opaque;
  68 }
  69
  70 void WebContentLayerImpl::DidChangeLayerCanUseLCDText() {
  71   // It is important to make this comparison because the LCD text status
  72   // here can get out of sync with that in the layer.
  73   if (can_use_lcd_text_ == layer_->layer()->can_use_lcd_text())
  74     return;
  75
  76   // LCD text cannot be enabled once disabled.
  77   if (layer_->layer()->can_use_lcd_text() && ignore_lcd_text_change_)
  78     return;
  79
  80   can_use_lcd_text_ = layer_->layer()->can_use_lcd_text();
  81   ignore_lcd_text_change_ = true;
  82   layer_->invalidate();
  83 }
  84
  85 bool WebContentLayerImpl::FillsBoundsCompletely() const { return false; }
  86
  87 }  // namespace webkit