1 /*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 #ifndef GLDISPATCHH
17 #define GLDISPATCHH
18 
19 #include <GLES/gl.h>
20 #include <GLES2/gl2.h>
21 #include "emugl/common/mutex.h"
22 #include "gldefs.h"
23 #include "GLutils.h"
24 
25 #define GLAPIENTRY GL_APIENTRY
26 typedef void(*FUNCPTR)();
27 
28 class GLDispatch
29 {
30 public:
31 
32     GLDispatch();
33     void dispatchFuncs(GLESVersion version);
34 
35     /* OpenGL functions which are needed for implementing BOTH GLES 1.1 & GLES 2.0*/
36     static void (GLAPIENTRY *glActiveTexture) ( GLenum texture );
37     static void (GLAPIENTRY *glBindBuffer) (GLenum target, GLuint buffer);
38     static void (GLAPIENTRY *glBindTexture) (GLenum target, GLuint texture);
39     static void (GLAPIENTRY *glBlendFunc) (GLenum sfactor, GLenum dfactor);
40     static void (GLAPIENTRY *glBlendEquation)( GLenum mode );
41     static void (GLAPIENTRY *glBlendEquationSeparate)(GLenum modeRGB, GLenum modeAlpha);
42     static void (GLAPIENTRY *glBlendFuncSeparate)(GLenum srcRGB, GLenum dstRGB, GLenum srcAlpha, GLenum dstAlpha);
43     static void (GLAPIENTRY *glBufferData) (GLenum target, GLsizeiptr size, const GLvoid *data, GLenum usage);
44     static void (GLAPIENTRY *glBufferSubData) (GLenum target, GLintptr offset, GLsizeiptr size, const GLvoid *data);
45     static void (GLAPIENTRY *glClear) (GLbitfield mask);
46     static void (GLAPIENTRY *glClearColor) (GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha);
47     static void (GLAPIENTRY *glClearStencil) (GLint s);
48     static void (GLAPIENTRY *glColorMask) (GLboolean red, GLboolean green, GLboolean blue, GLboolean alpha);
49     static void (GLAPIENTRY *glCompressedTexImage2D) ( GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLsizei imageSize, const GLvoid *data );
50     static void (GLAPIENTRY *glCompressedTexSubImage2D) ( GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const GLvoid *data );
51     static void (GLAPIENTRY *glCopyTexImage2D) (GLenum target, GLint level, GLenum internalFormat, GLint x, GLint y, GLsizei width, GLsizei height, GLint border);
52     static void (GLAPIENTRY *glCopyTexSubImage2D) (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height);
53     static void (GLAPIENTRY *glCullFace) (GLenum mode);
54     static void (GLAPIENTRY *glDeleteBuffers) (GLsizei n, const GLuint *buffers);
55     static void (GLAPIENTRY *glDeleteTextures) (GLsizei n, const GLuint *textures);
56     static void (GLAPIENTRY *glDepthFunc) (GLenum func);
57     static void (GLAPIENTRY *glDepthMask) (GLboolean flag);
58     static void (GLAPIENTRY *glDepthRange) (GLclampd zNear, GLclampd zFar);
59     static void (GLAPIENTRY *glDisable) (GLenum cap);
60     static void (GLAPIENTRY *glDrawArrays) (GLenum mode, GLint first, GLsizei count);
61     static void (GLAPIENTRY *glDrawElements) (GLenum mode, GLsizei count, GLenum type, const GLvoid *indices);
62     static void (GLAPIENTRY *glEnable) (GLenum cap);
63     static void (GLAPIENTRY *glFinish) (void);
64     static void (GLAPIENTRY *glFlush) (void);
65     static void (GLAPIENTRY *glFrontFace) (GLenum mode);
66     static void (GLAPIENTRY *glGenBuffers) (GLsizei n, GLuint *buffers);
67     static void (GLAPIENTRY *glGenTextures) (GLsizei n, GLuint *textures);
68     static void (GLAPIENTRY *glGetBooleanv) (GLenum pname, GLboolean *params);
69     static void (GLAPIENTRY *glGetBufferParameteriv) (GLenum, GLenum, GLint *);
70     static GLenum (GLAPIENTRY *glGetError) (void);
71     static void (GLAPIENTRY *glGetFloatv) (GLenum pname, GLfloat *params);
72     static void (GLAPIENTRY *glGetIntegerv) (GLenum pname, GLint *params);
73     static const GLubyte * (GLAPIENTRY *glGetString) (GLenum name);
74     static void (GLAPIENTRY *glGetTexParameterfv) (GLenum target, GLenum pname, GLfloat *params);
75     static void (GLAPIENTRY *glGetTexParameteriv) (GLenum target, GLenum pname, GLint *params);
76     static void (GLAPIENTRY *glGetTexLevelParameteriv) (GLenum target, GLint level, GLenum pname, GLint *params);
77     static void (GLAPIENTRY *glHint) (GLenum target, GLenum mode);
78     static GLboolean (GLAPIENTRY *glIsBuffer) (GLuint);
79     static GLboolean (GLAPIENTRY *glIsEnabled) (GLenum cap);
80     static GLboolean (GLAPIENTRY *glIsTexture) (GLuint texture);
81     static void (GLAPIENTRY *glLineWidth) (GLfloat width);
82     static void (GLAPIENTRY *glPolygonOffset) (GLfloat factor, GLfloat units);
83     static void (GLAPIENTRY *glPixelStorei) (GLenum pname, GLint param);
84     static void (GLAPIENTRY *glReadPixels) (GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLvoid *pixels);
85     static void (GLAPIENTRY *glSampleCoverage) ( GLclampf value, GLboolean invert );
86     static void (GLAPIENTRY *glScissor) (GLint x, GLint y, GLsizei width, GLsizei height);
87     static void (GLAPIENTRY *glStencilFunc) (GLenum func, GLint ref, GLuint mask);
88     static void (GLAPIENTRY *glStencilMask) (GLuint mask);
89     static void (GLAPIENTRY *glStencilOp) (GLenum fail, GLenum zfail, GLenum zpass);
90     static void (GLAPIENTRY *glTexImage2D) (GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
91     static void (GLAPIENTRY *glTexParameteri) (GLenum target, GLenum pname, GLint param);
92     static void (GLAPIENTRY *glTexParameteriv) (GLenum target, GLenum pname, const GLint *params);
93     static void (GLAPIENTRY *glTexSubImage2D) (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *pixels);
94     static void (GLAPIENTRY *glViewport) (GLint x, GLint y, GLsizei width, GLsizei height);
95     static void (GLAPIENTRY *glPushAttrib) ( GLbitfield mask );
96     static void (GLAPIENTRY *glPopAttrib) ( void );
97     static void (GLAPIENTRY *glPushClientAttrib) ( GLbitfield mask );
98     static void (GLAPIENTRY *glPopClientAttrib) ( void );
99     static GLboolean (GLAPIENTRY *glIsRenderbufferEXT) (GLuint renderbuffer);
100     static void (GLAPIENTRY *glBindRenderbufferEXT) (GLenum target, GLuint renderbuffer);
101     static void (GLAPIENTRY *glDeleteRenderbuffersEXT) (GLsizei n, const GLuint *renderbuffers);
102     static void (GLAPIENTRY *glGenRenderbuffersEXT) (GLsizei n, GLuint *renderbuffers);
103     static void (GLAPIENTRY *glRenderbufferStorageEXT) (GLenum target, GLenum internalformat, GLsizei width, GLsizei height);
104     static void (GLAPIENTRY *glGetRenderbufferParameterivEXT) (GLenum target, GLenum pname, GLint *params);
105     static GLboolean (GLAPIENTRY *glIsFramebufferEXT) (GLuint framebuffer);
106     static void (GLAPIENTRY *glBindFramebufferEXT) (GLenum target, GLuint framebuffer);
107     static void (GLAPIENTRY *glDeleteFramebuffersEXT) (GLsizei n, const GLuint *framebuffers);
108     static void (GLAPIENTRY *glGenFramebuffersEXT) (GLsizei n, GLuint *framebuffers);
109     static GLenum (GLAPIENTRY *glCheckFramebufferStatusEXT) (GLenum target);
110     static void (GLAPIENTRY *glFramebufferTexture1DEXT) (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
111     static void (GLAPIENTRY *glFramebufferTexture2DEXT) (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
112     static void (GLAPIENTRY *glFramebufferTexture3DEXT) (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level, GLint zoffset);
113     static void (GLAPIENTRY *glFramebufferRenderbufferEXT) (GLenum target, GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer);
114     static void (GLAPIENTRY *glGetFramebufferAttachmentParameterivEXT) (GLenum target, GLenum attachment, GLenum pname, GLint *params);
115     static void (GLAPIENTRY *glGenerateMipmapEXT) (GLenum target);
116 
117     /* OpenGL functions which are needed ONLY for implementing GLES 1.1*/
118     static void (GLAPIENTRY *glAlphaFunc) (GLenum func, GLclampf ref);
119     static void (GLAPIENTRY *glBegin)( GLenum mode );
120     static void (GLAPIENTRY *glClearDepth) (GLclampd depth);
121     static void (GLAPIENTRY *glClientActiveTexture) ( GLenum texture );
122     static void (GLAPIENTRY *glClipPlane) (GLenum plane, const GLdouble *equation);
123     static void (GLAPIENTRY *glColor4d) (GLdouble red, GLdouble green, GLdouble blue, GLdouble alpha);
124     static void (GLAPIENTRY *glColor4f) (GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha);
125     static void (GLAPIENTRY *glColor4fv) ( const GLfloat *v );
126     static void (GLAPIENTRY *glColor4ub) (GLubyte red, GLubyte green, GLubyte blue, GLubyte alpha);
127     static void (GLAPIENTRY *glColor4ubv) ( const GLubyte *v );
128     static void (GLAPIENTRY *glColorPointer) (GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
129     static void (GLAPIENTRY *glDisableClientState) (GLenum array);
130     static void (GLAPIENTRY *glEnableClientState) (GLenum array);
131     static void (GLAPIENTRY *glEnd) (void);
132     static void (GLAPIENTRY *glFogf) (GLenum pname, GLfloat param);
133     static void (GLAPIENTRY *glFogfv) (GLenum pname, const GLfloat *params);
134     static void (GLAPIENTRY *glFrustum) (GLdouble left, GLdouble right, GLdouble bottom, GLdouble top, GLdouble zNear, GLdouble zFar);
135     static void (GLAPIENTRY *glGetClipPlane) (GLenum plane, GLdouble *equation);
136     static void (GLAPIENTRY *glGetDoublev) ( GLenum pname, GLdouble *params );
137     static void (GLAPIENTRY *glGetLightfv) (GLenum light, GLenum pname, GLfloat *params);
138     static void (GLAPIENTRY *glGetMaterialfv) (GLenum face, GLenum pname, GLfloat *params);
139     static void (GLAPIENTRY *glGetPointerv) (GLenum pname, GLvoid* *params);
140     static void (GLAPIENTRY *glGetTexEnvfv) (GLenum target, GLenum pname, GLfloat *params);
141     static void (GLAPIENTRY *glGetTexEnviv) (GLenum target, GLenum pname, GLint *params);
142     static void (GLAPIENTRY *glLightf) (GLenum light, GLenum pname, GLfloat param);
143     static void (GLAPIENTRY *glLightfv) (GLenum light, GLenum pname, const GLfloat *params);
144     static void (GLAPIENTRY *glLightModelf) (GLenum pname, GLfloat param);
145     static void (GLAPIENTRY *glLightModelfv) (GLenum pname, const GLfloat *params);
146     static void (GLAPIENTRY *glLoadIdentity) (void);
147     static void (GLAPIENTRY *glLoadMatrixf) (const GLfloat *m);
148     static void (GLAPIENTRY *glLogicOp) (GLenum opcode);
149     static void (GLAPIENTRY *glMaterialf) (GLenum face, GLenum pname, GLfloat param);
150     static void (GLAPIENTRY *glMaterialfv) (GLenum face, GLenum pname, const GLfloat *params);
151     static void (GLAPIENTRY *glMultiTexCoord2fv) ( GLenum target, const GLfloat *v );
152     static void (GLAPIENTRY *glMultiTexCoord2sv) ( GLenum target, const GLshort *v );
153     static void (GLAPIENTRY *glMultiTexCoord3fv) ( GLenum target, const GLfloat *v );
154     static void (GLAPIENTRY *glMultiTexCoord3sv) ( GLenum target, const GLshort *v );
155     static void (GLAPIENTRY *glMultiTexCoord4f) ( GLenum target, GLfloat s, GLfloat t, GLfloat r, GLfloat q );
156     static void (GLAPIENTRY *glMultiTexCoord4fv) ( GLenum target, const GLfloat *v );
157     static void (GLAPIENTRY *glMultiTexCoord4sv) ( GLenum target, const GLshort *v );
158     static void (GLAPIENTRY *glMultMatrixf) (const GLfloat *m);
159     static void (GLAPIENTRY *glNormal3f) (GLfloat nx, GLfloat ny, GLfloat nz);
160     static void (GLAPIENTRY *glNormal3fv) ( const GLfloat *v );
161     static void (GLAPIENTRY *glNormal3sv) ( const GLshort *v );
162     static void (GLAPIENTRY *glOrtho) (GLdouble left, GLdouble right, GLdouble bottom, GLdouble top, GLdouble zNear, GLdouble zFar);
163     static void (GLAPIENTRY *glPointParameterf) (GLenum, GLfloat);
164     static void (GLAPIENTRY *glPointParameterfv) (GLenum, const GLfloat *);
165     static void (GLAPIENTRY *glPointSize) (GLfloat size);
166     static void (GLAPIENTRY *glRotatef) (GLfloat angle, GLfloat x, GLfloat y, GLfloat z);
167     static void (GLAPIENTRY *glScalef) (GLfloat x, GLfloat y, GLfloat z);
168     static void (GLAPIENTRY *glTexEnvf) (GLenum target, GLenum pname, GLfloat param);
169     static void (GLAPIENTRY *glTexEnvfv) (GLenum target, GLenum pname, const GLfloat *params);
170     static void (GLAPIENTRY *glTexParameterf) (GLenum target, GLenum pname, GLfloat param);
171     static void (GLAPIENTRY *glTexParameterfv) (GLenum target, GLenum pname, const GLfloat *params);
172     static void (GLAPIENTRY *glMatrixMode) (GLenum mode);
173     static void (GLAPIENTRY *glNormalPointer) (GLenum type, GLsizei stride, const GLvoid *pointer);
174     static void (GLAPIENTRY *glPopMatrix) (void);
175     static void (GLAPIENTRY *glPushMatrix) (void);
176     static void (GLAPIENTRY *glShadeModel) (GLenum mode);
177     static void (GLAPIENTRY *glTexCoordPointer) (GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
178     static void (GLAPIENTRY *glTexEnvi) (GLenum target, GLenum pname, GLint param);
179     static void (GLAPIENTRY *glTexEnviv) (GLenum target, GLenum pname, const GLint *params);
180     static void (GLAPIENTRY *glTranslatef) (GLfloat x, GLfloat y, GLfloat z);
181     static void (GLAPIENTRY *glVertexPointer) (GLint size, GLenum type, GLsizei stride, const GLvoid *pointer);
182 
183     /* OpenGL functions which are needed ONLY for implementing GLES 1.1 EXTENSIONS*/
184     static void (GLAPIENTRY *glCurrentPaletteMatrixARB) (GLint index);
185     static void (GLAPIENTRY *glMatrixIndexuivARB) (GLint size, GLuint * indices);
186     static void (GLAPIENTRY *glMatrixIndexPointerARB) (GLint size, GLenum type, GLsizei stride, const GLvoid* pointer);
187     static void (GLAPIENTRY *glWeightPointerARB) (GLint size, GLenum type, GLsizei stride, const GLvoid* pointer);
188     static void (GLAPIENTRY *glTexGenf) (GLenum coord, GLenum pname, GLfloat param );
189     static void (GLAPIENTRY *glTexGeni) (GLenum coord, GLenum pname, GLint param );
190     static void (GLAPIENTRY *glTexGenfv) (GLenum coord, GLenum pname, const GLfloat *params );
191     static void (GLAPIENTRY *glTexGeniv) (GLenum coord, GLenum pname, const GLint *params );
192     static void (GLAPIENTRY *glGetTexGenfv) (GLenum coord, GLenum pname, GLfloat *params );
193     static void (GLAPIENTRY *glGetTexGeniv) (GLenum coord, GLenum pname, GLint *params );
194 
195     /* Loading OpenGL functions which are needed ONLY for implementing GLES 2.0*/
196     static void (GL_APIENTRY *glBlendColor) (GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha);
197     static void (GL_APIENTRY *glStencilFuncSeparate)(GLenum face, GLenum func, GLint ref, GLuint mask);
198     static void (GL_APIENTRY *glStencilMaskSeparate)(GLenum face, GLuint mask);
199     static GLboolean (GL_APIENTRY *glIsProgram)(GLuint program);
200     static GLboolean (GL_APIENTRY *glIsShader)(GLuint shader);
201     static void (GL_APIENTRY *glVertexAttrib1f)(GLuint indx, GLfloat x);
202     static void (GL_APIENTRY *glVertexAttrib1fv)(GLuint indx, const GLfloat* values);
203     static void (GL_APIENTRY *glVertexAttrib2f)(GLuint indx, GLfloat x, GLfloat y);
204     static void (GL_APIENTRY *glVertexAttrib2fv)(GLuint indx, const GLfloat* values);
205     static void (GL_APIENTRY *glVertexAttrib3f)(GLuint indx, GLfloat x, GLfloat y, GLfloat z);
206     static void (GL_APIENTRY *glVertexAttrib3fv)(GLuint indx, const GLfloat* values);
207     static void (GL_APIENTRY *glVertexAttrib4f)(GLuint indx, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
208     static void (GL_APIENTRY *glVertexAttrib4fv)(GLuint indx, const GLfloat* values);
209     static void (GL_APIENTRY *glVertexAttribPointer)(GLuint indx, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid* ptr);
210     static void (GL_APIENTRY *glDisableVertexAttribArray)(GLuint index);
211     static void (GL_APIENTRY *glEnableVertexAttribArray)(GLuint index);
212     static void (GL_APIENTRY *glGetVertexAttribfv)(GLuint index, GLenum pname, GLfloat* params);
213     static void (GL_APIENTRY *glGetVertexAttribiv)(GLuint index, GLenum pname, GLint* params);
214     static void (GL_APIENTRY *glGetVertexAttribPointerv)(GLuint index, GLenum pname, GLvoid** pointer);
215     static void (GL_APIENTRY *glUniform1f)(GLint location, GLfloat x);
216     static void (GL_APIENTRY *glUniform1fv)(GLint location, GLsizei count, const GLfloat* v);
217     static void (GL_APIENTRY *glUniform1i)(GLint location, GLint x);
218     static void (GL_APIENTRY *glUniform1iv)(GLint location, GLsizei count, const GLint* v);
219     static void (GL_APIENTRY *glUniform2f)(GLint location, GLfloat x, GLfloat y);
220     static void (GL_APIENTRY *glUniform2fv)(GLint location, GLsizei count, const GLfloat* v);
221     static void (GL_APIENTRY *glUniform2i)(GLint location, GLint x, GLint y);
222     static void (GL_APIENTRY *glUniform2iv)(GLint location, GLsizei count, const GLint* v);
223     static void (GL_APIENTRY *glUniform3f)(GLint location, GLfloat x, GLfloat y, GLfloat z);
224     static void (GL_APIENTRY *glUniform3fv)(GLint location, GLsizei count, const GLfloat* v);
225     static void (GL_APIENTRY *glUniform3i)(GLint location, GLint x, GLint y, GLint z);
226     static void (GL_APIENTRY *glUniform3iv)(GLint location, GLsizei count, const GLint* v);
227     static void (GL_APIENTRY *glUniform4f)(GLint location, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
228     static void (GL_APIENTRY *glUniform4fv)(GLint location, GLsizei count, const GLfloat* v);
229     static void (GL_APIENTRY *glUniform4i)(GLint location, GLint x, GLint y, GLint z, GLint w);
230     static void (GL_APIENTRY *glUniform4iv)(GLint location, GLsizei count, const GLint* v);
231     static void (GL_APIENTRY *glUniformMatrix2fv)(GLint location, GLsizei count, GLboolean transpose, const GLfloat* value);
232     static void (GL_APIENTRY *glUniformMatrix3fv)(GLint location, GLsizei count, GLboolean transpose, const GLfloat* value);
233     static void (GL_APIENTRY *glUniformMatrix4fv)(GLint location, GLsizei count, GLboolean transpose, const GLfloat* value);
234     static void (GL_APIENTRY *glAttachShader)(GLuint program, GLuint shader);
235     static void (GL_APIENTRY *glBindAttribLocation)(GLuint program, GLuint index, const GLchar* name);
236     static void (GL_APIENTRY *glCompileShader)(GLuint shader);
237     static GLuint (GL_APIENTRY *glCreateProgram)(void);
238     static GLuint (GL_APIENTRY *glCreateShader)(GLenum type);
239     static void (GL_APIENTRY *glDeleteProgram)(GLuint program);
240     static void (GL_APIENTRY *glDeleteShader)(GLuint shader);
241     static void (GL_APIENTRY *glDetachShader)(GLuint program, GLuint shader);
242     static void (GL_APIENTRY *glLinkProgram)(GLuint program);
243     static void (GL_APIENTRY *glUseProgram)(GLuint program);
244     static void (GL_APIENTRY *glValidateProgram)(GLuint program);
245     static void (GL_APIENTRY *glGetActiveAttrib)(GLuint program, GLuint index, GLsizei bufsize, GLsizei* length, GLint* size, GLenum* type, GLchar* name);
246     static void (GL_APIENTRY *glGetActiveUniform)(GLuint program, GLuint index, GLsizei bufsize, GLsizei* length, GLint* size, GLenum* type, GLchar* name);
247     static void (GL_APIENTRY *glGetAttachedShaders)(GLuint program, GLsizei maxcount, GLsizei* count, GLuint* shaders);
248     static int  (GL_APIENTRY *glGetAttribLocation)(GLuint program, const GLchar* name);
249     static void (GL_APIENTRY *glGetProgramiv)(GLuint program, GLenum pname, GLint* params);
250     static void (GL_APIENTRY *glGetProgramInfoLog)(GLuint program, GLsizei bufsize, GLsizei* length, GLchar* infolog);
251     static void (GL_APIENTRY *glGetShaderiv)(GLuint shader, GLenum pname, GLint* params);
252     static void (GL_APIENTRY *glGetShaderInfoLog)(GLuint shader, GLsizei bufsize, GLsizei* length, GLchar* infolog);
253     static void (GL_APIENTRY *glGetShaderPrecisionFormat)(GLenum shadertype, GLenum precisiontype, GLint* range, GLint* precision);
254     static void (GL_APIENTRY *glGetShaderSource)(GLuint shader, GLsizei bufsize, GLsizei* length, GLchar* source);
255     static void (GL_APIENTRY *glGetUniformfv)(GLuint program, GLint location, GLfloat* params);
256     static void (GL_APIENTRY *glGetUniformiv)(GLuint program, GLint location, GLint* params);
257     static int  (GL_APIENTRY *glGetUniformLocation)(GLuint program, const GLchar* name);
258     static void (GL_APIENTRY *glReleaseShaderCompiler)(void);
259     static void (GL_APIENTRY *glShaderBinary)(GLsizei n, const GLuint* shaders, GLenum binaryformat, const GLvoid* binary, GLsizei length);
260     static void (GL_APIENTRY *glShaderSource)(GLuint shader, GLsizei count, const GLchar** string, const GLint* length);
261 
262 private:
263     bool                  m_isLoaded;
264     static emugl::Mutex   s_lock;
265 };
266 
267 #endif
268