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      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 <utils/threads.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 android::Mutex   s_lock;
    265 };
    266 
    267 #endif
    268