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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 ProgramBinding_h
     27 #define ProgramBinding_h
     28 
     29 #if USE(ACCELERATED_COMPOSITING)
     30 
     31 #include "PlatformString.h"
     32 
     33 namespace WebCore {
     34 
     35 class GraphicsContext3D;
     36 
     37 class ProgramBindingBase {
     38 public:
     39     explicit ProgramBindingBase(GraphicsContext3D*);
     40     ~ProgramBindingBase();
     41 
     42     bool init(const String& vertexShader, const String& fragmentShader);
     43 
     44     unsigned program() const { return m_program; }
     45     bool initialized() const { return m_initialized; }
     46 
     47 protected:
     48 
     49     unsigned loadShader(unsigned type, const String& shaderSource);
     50     unsigned createShaderProgram(const String& vertexShaderSource, const String& fragmentShaderSource);
     51 
     52     GraphicsContext3D* m_context;
     53     unsigned m_program;
     54     bool m_initialized;
     55 };
     56 
     57 template<class VertexShader, class FragmentShader>
     58 class ProgramBinding : public ProgramBindingBase {
     59 public:
     60     explicit ProgramBinding(GraphicsContext3D* context)
     61         : ProgramBindingBase(context)
     62     {
     63         if (!ProgramBindingBase::init(m_vertexShader.getShaderString(), m_fragmentShader.getShaderString()))
     64             return;
     65         if (!m_vertexShader.init(m_context, m_program))
     66             return;
     67         if (!m_fragmentShader.init(m_context, m_program))
     68             return;
     69         m_initialized = true;
     70     }
     71 
     72     const VertexShader& vertexShader() const { return m_vertexShader; }
     73     const FragmentShader& fragmentShader() const { return m_fragmentShader; }
     74 
     75 private:
     76 
     77     VertexShader m_vertexShader;
     78     FragmentShader m_fragmentShader;
     79 };
     80 
     81 } // namespace WebCore
     82 
     83 #endif // USE(ACCELERATED_COMPOSITING)
     84 
     85 #endif
     86