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