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      1 // Copyright 2014 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 "content/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 content {
     20 
     21 WebContentLayerImpl::WebContentLayerImpl(blink::WebContentLayerClient* client)
     22     : client_(client), ignore_lcd_text_change_(false) {
     23   if (WebLayerImpl::UsingPictureLayer())
     24     layer_ = make_scoped_ptr(new WebLayerImpl(PictureLayer::Create(this)));
     25   else
     26     layer_ = make_scoped_ptr(new WebLayerImpl(ContentLayer::Create(this)));
     27   layer_->layer()->SetIsDrawable(true);
     28   can_use_lcd_text_ = layer_->layer()->can_use_lcd_text();
     29 }
     30 
     31 WebContentLayerImpl::~WebContentLayerImpl() {
     32   if (WebLayerImpl::UsingPictureLayer())
     33     static_cast<PictureLayer*>(layer_->layer())->ClearClient();
     34   else
     35     static_cast<ContentLayer*>(layer_->layer())->ClearClient();
     36 }
     37 
     38 blink::WebLayer* WebContentLayerImpl::layer() {
     39   return layer_.get();
     40 }
     41 
     42 void WebContentLayerImpl::setDoubleSided(bool double_sided) {
     43   layer_->layer()->SetDoubleSided(double_sided);
     44 }
     45 
     46 void WebContentLayerImpl::setDrawCheckerboardForMissingTiles(bool enable) {
     47   layer_->layer()->SetDrawCheckerboardForMissingTiles(enable);
     48 }
     49 
     50 void WebContentLayerImpl::PaintContents(
     51     SkCanvas* canvas,
     52     const gfx::Rect& clip,
     53     gfx::RectF* opaque,
     54     ContentLayerClient::GraphicsContextStatus graphics_context_status) {
     55   if (!client_)
     56     return;
     57 
     58   blink::WebFloatRect web_opaque;
     59   client_->paintContents(
     60       canvas,
     61       clip,
     62       can_use_lcd_text_,
     63       web_opaque,
     64       graphics_context_status == ContentLayerClient::GRAPHICS_CONTEXT_ENABLED
     65           ? blink::WebContentLayerClient::GraphicsContextEnabled
     66           : blink::WebContentLayerClient::GraphicsContextDisabled);
     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 {
     86   return false;
     87 }
     88 
     89 }  // namespace content
     90 
     91