1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#ifndef BACKENDS_GRAPHICS_OPENGL_SHADER_H
#define BACKENDS_GRAPHICS_OPENGL_SHADER_H
#include "backends/graphics/opengl/opengl-sys.h"
#if !USE_FORCED_GL && !USE_FORCED_GLES
#include "common/str.h"
namespace OpenGL {
enum {
kPositionAttribLocation = 0,
kTexCoordAttribLocation = 1,
kColorAttribLocation = 2
};
extern const char *const g_defaultVertexShader;
extern const char *const g_defaultFragmentShader;
class Shader {
public:
Shader(const Common::String &vertex, const Common::String &fragment);
~Shader() { destroy(); }
/**
* Destroy the shader program.
*
* This keeps the vertex and fragment shader sources around and thus
* allows for recreating the shader on context recreation.
*/
void destroy();
/**
* Recreate shader program.
*
* @return true on success, false on failure.
*/
bool recreate();
/**
* Make shader active.
*
* @param projectionMatrix Projection matrix to use.
*/
void activate(const GLfloat *projectionMatrix);
private:
/**
* Vertex shader sources.
*/
const Common::String _vertex;
/**
* Fragment shader sources.
*/
const Common::String _fragment;
/**
* Shader program handle.
*/
GLuint _program;
/**
* Location of the matrix uniform in the shader program.
*/
GLint _projectionLocation;
/**
* Location of the texture sampler location in the shader program.
*/
GLint _textureLocation;
/**
* Compile a vertex or fragment shader.
*
* @param source Sources to the shader.
* @param shaderType Type of shader to compile (GL_FRAGMENT_SHADER or
* GL_VERTEX_SHADER)
* @return The shader object or 0 on failure.
*/
static GLuint compileShader(const char *source, GLenum shaderType);
};
} // End of namespace OpenGL
#endif // !USE_FORCED_GL && !USE_FORCED_GLES
#endif
|
