content/renderer/compositor_bindings/web_content_layer_impl.cc

   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