text: /*
   * Copyright (c) 2010, Google Inc. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are
   * met:
   *
   *     * Redistributions of source code must retain the above copyright
   * notice, this list of conditions and the following disclaimer.
   *     * Redistributions in binary form must reproduce the above
   * copyright notice, this list of conditions and the following disclaimer
   * in the documentation and/or other materials provided with the
   * distribution.
   *     * Neither the name of Google Inc. nor the names of its
   * contributors may be used to endorse or promote products derived from
   * this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #ifndef Shader_h
  #define Shader_h
  
  #include <wtf/Noncopyable.h>
  #include <wtf/PassOwnPtr.h>
  #include <wtf/text/WTFString.h>
  
  namespace WebCore {
  
  class AffineTransform;
  class GraphicsContext3D;
  class Color;
  
  class Shader {
      WTF_MAKE_NONCOPYABLE(Shader);
  public:
      enum VertexType {
          TwoDimensional,
          LoopBlinnInterior,
          LoopBlinnExterior
      };
  
      enum FillType {
          SolidFill,
          TextureFill
      };
  
      // Currently only applies to the Loop-Blinn vertex type.
      enum AntialiasType {
          NotAntialiased,
          Antialiased
      };
  
  protected:
      Shader(GraphicsContext3D*, unsigned program);
      ~Shader();
  
      static String generateVertex(VertexType, FillType);
      static String generateFragment(VertexType, FillType, AntialiasType);
  
      static void affineTo3x3(const AffineTransform&, float mat[9]);
      static void affineTo4x4(const AffineTransform&, float mat[16]);
      static unsigned loadShader(GraphicsContext3D*, unsigned type, const String& shaderSource);
      static unsigned loadProgram(GraphicsContext3D*, const String& vertexShaderSource, const String& fragmentShaderSource);
  
      GraphicsContext3D* m_context;
      unsigned m_program;
  };
  
  }
  
  #endif // Shader_h
  