third_party/WebKit/public/platform/WebContentLayer.h

   1 /*
   2  * Copyright (C) 2011 Google Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  *
   8  * 1.  Redistributions of source code must retain the above copyright
   9  *     notice, this list of conditions and the following disclaimer.
  10  * 2.  Redistributions in binary form must reproduce the above copyright
  11  *     notice, this list of conditions and the following disclaimer in the
  12  *     documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  16  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  17  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  18  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  19  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  20  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  21  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef WebContentLayer_h
  27 #define WebContentLayer_h
  28
  29 #include "WebCommon.h"
  30 #include "WebLayer.h"
  31
  32 namespace blink {
  33
  34 class WebContentLayer {
  35 public:
  36     virtual ~WebContentLayer() { }
  37
  38     // The WebContentLayer has ownership of this wrapper.
  39     virtual WebLayer* layer() = 0;
  40
  41     // Set to true if the backside of this layer's contents should be visible when composited.
  42     // Defaults to false.
  43     virtual void setDoubleSided(bool) {}
  44
  45     // Allow the compositor to determine the scale at which the layer should
  46     // be rasterized based on the layer's hierarchy and transform. This defaults
  47     // to false.
  48     virtual void setAutomaticallyComputeRasterScale(bool) { }
  49 };
  50
  51 } // namespace blink
  52
  53 #endif // WebContentLayer_h