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Diffstat (limited to 'util/fbcompose/OpenGLShaders.hh')
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diff --git a/util/fbcompose/OpenGLShaders.hh b/util/fbcompose/OpenGLShaders.hh new file mode 100644 index 0000000..ee4a6b2 --- /dev/null +++ b/util/fbcompose/OpenGLShaders.hh | |||
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1 | /** OpenGLShaders.hh file for the fluxbox compositor. */ | ||
2 | |||
3 | // Copyright (c) 2011 Gediminas Liktaras (gliktaras at gmail dot com) | ||
4 | // | ||
5 | // Permission is hereby granted, free of charge, to any person obtaining a copy | ||
6 | // of this software and associated documentation files (the "Software"), to deal | ||
7 | // in the Software without restriction, including without limitation the rights | ||
8 | // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
9 | // copies of the Software, and to permit persons to whom the Software is | ||
10 | // furnished to do so, subject to the following conditions: | ||
11 | // | ||
12 | // The above copyright notice and this permission notice shall be included in | ||
13 | // all copies or substantial portions of the Software. | ||
14 | // | ||
15 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
16 | // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
17 | // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
18 | // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
19 | // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
20 | // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
21 | // THE SOFTWARE. | ||
22 | |||
23 | |||
24 | #ifndef FBCOMPOSITOR_OPENGLSHADERS_HH | ||
25 | #define FBCOMPOSITOR_OPENGLSHADERS_HH | ||
26 | |||
27 | |||
28 | #include "FbTk/Command.hh" | ||
29 | #include "FbTk/RefCount.hh" | ||
30 | |||
31 | #include <GL/glew.h> | ||
32 | #include <GL/gl.h> | ||
33 | |||
34 | #include <vector> | ||
35 | |||
36 | |||
37 | namespace FbCompositor { | ||
38 | |||
39 | class BasePlugin; | ||
40 | |||
41 | |||
42 | //--- SHADER INITIALIZERS -------------------------------------------------- | ||
43 | |||
44 | /** Rendering job initialization functor. */ | ||
45 | typedef FbTk::Command<void> OpenGLShaderInitializer; | ||
46 | |||
47 | /** | ||
48 | * Null initialization action. | ||
49 | */ | ||
50 | class NullInitializer : public OpenGLShaderInitializer { | ||
51 | public : | ||
52 | virtual ~NullInitializer() { } | ||
53 | void execute() { } | ||
54 | }; | ||
55 | |||
56 | |||
57 | //--- SHADER DEINITIALIZERS ------------------------------------------------ | ||
58 | |||
59 | /** Rendering job cleanup functor. */ | ||
60 | typedef FbTk::Command<void> OpenGLShaderDeinitializer; | ||
61 | |||
62 | /** | ||
63 | * Null cleanup action. | ||
64 | */ | ||
65 | class NullDeinitializer : public OpenGLShaderDeinitializer { | ||
66 | public : | ||
67 | virtual ~NullDeinitializer() { } | ||
68 | void execute() { } | ||
69 | }; | ||
70 | |||
71 | |||
72 | //--- SHADER PROGRAM WRAPPER ----------------------------------------------- | ||
73 | |||
74 | /** | ||
75 | * OpenGL shader program wrapper. | ||
76 | */ | ||
77 | class OpenGLShaderProgram { | ||
78 | public : | ||
79 | //--- CONSTRUCTORS AND DESTRUCTORS ------------------------------------- | ||
80 | |||
81 | /** Constructor. */ | ||
82 | OpenGLShaderProgram(const std::vector<BasePlugin*> &plugins); | ||
83 | |||
84 | /** Destructor. */ | ||
85 | ~OpenGLShaderProgram(); | ||
86 | |||
87 | |||
88 | //--- ACCESSORS -------------------------------------------------------- | ||
89 | |||
90 | /** \returns handle to the shader program. */ | ||
91 | GLuint programHandle() const; | ||
92 | |||
93 | |||
94 | /** \returns location of the given attribute. */ | ||
95 | GLuint getAttributeLocation(const char *attrib_name); | ||
96 | |||
97 | /** \returns location of the fb_InitMainTexCoord attribute. */ | ||
98 | GLuint mainTexCoordAttrib() const; | ||
99 | |||
100 | /** \returns location of the fb_InitPrimPos attribute. */ | ||
101 | GLuint primPosAttrib() const; | ||
102 | |||
103 | /** \returns location of the fb_InitShapeTexCoord attribute. */ | ||
104 | GLuint shapeTexCoordAttrib() const; | ||
105 | |||
106 | |||
107 | /** \returns location of the given uniform. */ | ||
108 | GLuint getUniformLocation(const char *uniform_name); | ||
109 | |||
110 | /** \returns location of the fb_Alpha uniform. */ | ||
111 | GLuint alphaUniform() const; | ||
112 | |||
113 | /** \returns location of the fb_MainTexture uniform. */ | ||
114 | GLuint mainTexUniform() const; | ||
115 | |||
116 | /** \returns location of the fb_ShapeTexture uniform. */ | ||
117 | GLuint shapeTexUniform() const; | ||
118 | |||
119 | |||
120 | //--- SHADER MANIPULATION ---------------------------------------------- | ||
121 | |||
122 | /** Uses the current shader program. */ | ||
123 | void use(); | ||
124 | |||
125 | |||
126 | private : | ||
127 | //--- INITIALIZATION FUNCTIONS ----------------------------------------- | ||
128 | |||
129 | /** Creates a shader. */ | ||
130 | GLuint createShader(GLenum shader_type, GLint source_length, const GLchar *source); | ||
131 | |||
132 | /** Creates a shader program. */ | ||
133 | GLuint createShaderProgram(GLuint vertex_shader, GLuint fragment_shader); | ||
134 | |||
135 | |||
136 | //--- MAIN VARIABLES --------------------------------------------------- | ||
137 | |||
138 | /** The vertex shader. */ | ||
139 | GLuint m_vertex_shader; | ||
140 | |||
141 | /** The fragment shader. */ | ||
142 | GLuint m_fragment_shader; | ||
143 | |||
144 | /** The shader program. */ | ||
145 | GLuint m_shader_program; | ||
146 | |||
147 | |||
148 | /** Location of the fb_InitMainTexCoord attribute. */ | ||
149 | GLuint m_main_tex_coord_attrib; | ||
150 | |||
151 | /** Location of the fb_InitPrimPos attribute. */ | ||
152 | GLuint m_prim_pos_attrib; | ||
153 | |||
154 | /** Location of the fb_InitShapeTexCoord attribute. */ | ||
155 | GLuint m_shape_tex_coord_attrib; | ||
156 | |||
157 | |||
158 | /** Location of the fb_Alpha uniform. */ | ||
159 | GLuint m_alpha_uniform; | ||
160 | |||
161 | /** Location of the fb_MainTexture uniform. */ | ||
162 | GLuint m_main_tex_uniform; | ||
163 | |||
164 | /** Location of the fb_ShapeTexture uniform. */ | ||
165 | GLuint m_shape_tex_uniform; | ||
166 | }; | ||
167 | |||
168 | |||
169 | //--- INLINE FUNCTIONS ------------------------------------------------- | ||
170 | |||
171 | // Returns location of the fb_Alpha uniform. | ||
172 | inline GLuint OpenGLShaderProgram::alphaUniform() const { | ||
173 | return m_alpha_uniform; | ||
174 | } | ||
175 | |||
176 | // Returns location of the given attribute. | ||
177 | inline GLuint OpenGLShaderProgram::getAttributeLocation(const char *attrib_name) { | ||
178 | return glGetAttribLocation(m_shader_program, attrib_name); | ||
179 | } | ||
180 | |||
181 | // Returns location of the given uniform. | ||
182 | inline GLuint OpenGLShaderProgram::getUniformLocation(const char *uniform_name) { | ||
183 | return glGetUniformLocation(m_shader_program, uniform_name); | ||
184 | } | ||
185 | |||
186 | // Returns location of the fb_InitMainTexCoord attribute. | ||
187 | inline GLuint OpenGLShaderProgram::mainTexCoordAttrib() const { | ||
188 | return m_main_tex_coord_attrib; | ||
189 | } | ||
190 | |||
191 | // Returns location of the fb_MainTexture uniform. | ||
192 | inline GLuint OpenGLShaderProgram::mainTexUniform() const { | ||
193 | return m_main_tex_uniform; | ||
194 | } | ||
195 | |||
196 | // Returns location of the fb_InitPrimPos attribute. | ||
197 | inline GLuint OpenGLShaderProgram::primPosAttrib() const { | ||
198 | return m_prim_pos_attrib; | ||
199 | } | ||
200 | |||
201 | // Returns the handle to the shader program. | ||
202 | inline GLuint OpenGLShaderProgram::programHandle() const { | ||
203 | return m_shader_program; | ||
204 | } | ||
205 | |||
206 | // Returns location of the fb_InitShapeTexCoord attribute. | ||
207 | inline GLuint OpenGLShaderProgram::shapeTexCoordAttrib() const { | ||
208 | return m_shape_tex_coord_attrib; | ||
209 | } | ||
210 | |||
211 | // Returns location of the fb_ShapeTexture uniform. | ||
212 | inline GLuint OpenGLShaderProgram::shapeTexUniform() const { | ||
213 | return m_shape_tex_uniform; | ||
214 | } | ||
215 | |||
216 | // Uses the current shader program. | ||
217 | inline void OpenGLShaderProgram::use() { | ||
218 | glUseProgram(m_shader_program); | ||
219 | } | ||
220 | |||
221 | |||
222 | //--- TYPEDEFS --------------------------------------------------------- | ||
223 | |||
224 | typedef FbTk::RefCount<OpenGLShaderProgram> OpenGLShaderProgramPtr; | ||
225 | } | ||
226 | |||
227 | #endif // FBCOMPOSITOR_OPENGLSHADERS_HH | ||