1 /*
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3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions are
6  * met:
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9  * notice, this list of conditions and the following disclaimer.
10  *     * Redistributions in binary form must reproduce the above
11  * copyright notice, this list of conditions and the following disclaimer
12  * in the documentation and/or other materials provided with the
13  * distribution.
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15  * contributors may be used to endorse or promote products derived from
16  * this software without specific prior written permission.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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29  */
30 
31 #ifndef Shader_h
32 #define Shader_h
33 
34 #include <wtf/Noncopyable.h>
35 #include <wtf/PassOwnPtr.h>
36 #include <wtf/text/WTFString.h>
37 
38 namespace WebCore {
39 
40 class AffineTransform;
41 class GraphicsContext3D;
42 class Color;
43 
44 class Shader {
45     WTF_MAKE_NONCOPYABLE(Shader);
46 public:
47     enum VertexType {
48         TwoDimensional,
49         LoopBlinnInterior,
50         LoopBlinnExterior
51     };
52 
53     enum FillType {
54         SolidFill,
55         TextureFill
56     };
57 
58     // Currently only applies to the Loop-Blinn vertex type.
59     enum AntialiasType {
60         NotAntialiased,
61         Antialiased
62     };
63 
64 protected:
65     Shader(GraphicsContext3D*, unsigned program);
66     ~Shader();
67 
68     static String generateVertex(VertexType, FillType);
69     static String generateFragment(VertexType, FillType, AntialiasType);
70 
71     static void affineTo3x3(const AffineTransform&, float mat[9]);
72     static void affineTo4x4(const AffineTransform&, float mat[16]);
73     static unsigned loadShader(GraphicsContext3D*, unsigned type, const String& shaderSource);
74     static unsigned loadProgram(GraphicsContext3D*, const String& vertexShaderSource, const String& fragmentShaderSource);
75 
76     GraphicsContext3D* m_context;
77     unsigned m_program;
78 };
79 
80 }
81 
82 #endif // Shader_h
83