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      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 GeometryBinding_h
     27 #define GeometryBinding_h
     28 
     29 #if USE(ACCELERATED_COMPOSITING)
     30 
     31 #include "PlatformString.h"
     32 
     33 namespace WebCore {
     34 
     35 class GraphicsContext3D;
     36 
     37 class GeometryBinding {
     38 public:
     39     explicit GeometryBinding(GraphicsContext3D*);
     40     ~GeometryBinding();
     41 
     42     bool initialized() const { return m_initialized; }
     43 
     44     GraphicsContext3D* context() const { return m_context; }
     45     unsigned quadVerticesVbo() const { return m_quadVerticesVbo; }
     46     unsigned quadElementsVbo() const { return m_quadElementsVbo; }
     47 
     48     void prepareForDraw();
     49 
     50     // All layer shaders share the same attribute locations for the vertex
     51     // positions and texture coordinates. This allows switching shaders without
     52     // rebinding attribute arrays.
     53     static int positionAttribLocation() { return 0; }
     54     static int texCoordAttribLocation() { return 1; }
     55 
     56 private:
     57     GraphicsContext3D* m_context;
     58     unsigned m_quadVerticesVbo;
     59     unsigned m_quadElementsVbo;
     60     bool m_initialized;
     61 };
     62 
     63 } // namespace WebCore
     64 
     65 #endif // USE(ACCELERATED_COMPOSITING)
     66 
     67 #endif
     68