1/*
2 * Copyright (c) 2010, 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 are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
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.
14 *     * Neither the name of Google Inc. nor the names of its
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,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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
38namespace WebCore {
39
40class AffineTransform;
41class GraphicsContext3D;
42class Color;
43
44class Shader {
45    WTF_MAKE_NONCOPYABLE(Shader);
46public:
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
64protected:
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