diff options
Diffstat (limited to 'auto/src/glew_init_gl.c')
| -rw-r--r-- | auto/src/glew_init_gl.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/auto/src/glew_init_gl.c b/auto/src/glew_init_gl.c new file mode 100644 index 0000000..c438792 --- /dev/null +++ b/auto/src/glew_init_gl.c @@ -0,0 +1,73 @@ +/* ------------------------------------------------------------------------- */ + +GLboolean GLEWAPIENTRY glewGetExtension (const char* name) +{ + const GLubyte* start; + const GLubyte* end; + start = (const GLubyte*)glGetString(GL_EXTENSIONS); + if (start == 0) + return GL_FALSE; + end = start + _glewStrLen(start); + return _glewSearchExtension(name, start, end); +} + +/* ------------------------------------------------------------------------- */ + +#ifndef GLEW_MX +static +#endif +GLenum GLEWAPIENTRY glewContextInit (GLEW_CONTEXT_ARG_DEF_LIST) +{ + const GLubyte* s; + GLuint dot; + GLint major, minor; + const GLubyte* extStart; + const GLubyte* extEnd; + /* query opengl version */ + s = glGetString(GL_VERSION); + dot = _glewStrCLen(s, '.'); + if (dot == 0) + return GLEW_ERROR_NO_GL_VERSION; + + major = s[dot-1]-'0'; + minor = s[dot+1]-'0'; + + if (minor < 0 || minor > 9) + minor = 0; + if (major<0 || major>9) + return GLEW_ERROR_NO_GL_VERSION; + + + if (major == 1 && minor == 0) + { + return GLEW_ERROR_GL_VERSION_10_ONLY; + } + else + { + GLEW_VERSION_4_5 = ( major > 4 ) || ( major == 4 && minor >= 5 ) ? GL_TRUE : GL_FALSE; + GLEW_VERSION_4_4 = GLEW_VERSION_4_5 == GL_TRUE || ( major == 4 && minor >= 4 ) ? GL_TRUE : GL_FALSE; + GLEW_VERSION_4_3 = GLEW_VERSION_4_4 == GL_TRUE || ( major == 4 && minor >= 3 ) ? GL_TRUE : GL_FALSE; + GLEW_VERSION_4_2 = GLEW_VERSION_4_3 == GL_TRUE || ( major == 4 && minor >= 2 ) ? GL_TRUE : GL_FALSE; + GLEW_VERSION_4_1 = GLEW_VERSION_4_2 == GL_TRUE || ( major == 4 && minor >= 1 ) ? GL_TRUE : GL_FALSE; + GLEW_VERSION_4_0 = GLEW_VERSION_4_1 == GL_TRUE || ( major == 4 ) ? GL_TRUE : GL_FALSE; + GLEW_VERSION_3_3 = GLEW_VERSION_4_0 == GL_TRUE || ( major == 3 && minor >= 3 ) ? GL_TRUE : GL_FALSE; + GLEW_VERSION_3_2 = GLEW_VERSION_3_3 == GL_TRUE || ( major == 3 && minor >= 2 ) ? GL_TRUE : GL_FALSE; + GLEW_VERSION_3_1 = GLEW_VERSION_3_2 == GL_TRUE || ( major == 3 && minor >= 1 ) ? GL_TRUE : GL_FALSE; + GLEW_VERSION_3_0 = GLEW_VERSION_3_1 == GL_TRUE || ( major == 3 ) ? GL_TRUE : GL_FALSE; + GLEW_VERSION_2_1 = GLEW_VERSION_3_0 == GL_TRUE || ( major == 2 && minor >= 1 ) ? GL_TRUE : GL_FALSE; + GLEW_VERSION_2_0 = GLEW_VERSION_2_1 == GL_TRUE || ( major == 2 ) ? GL_TRUE : GL_FALSE; + GLEW_VERSION_1_5 = GLEW_VERSION_2_0 == GL_TRUE || ( major == 1 && minor >= 5 ) ? GL_TRUE : GL_FALSE; + GLEW_VERSION_1_4 = GLEW_VERSION_1_5 == GL_TRUE || ( major == 1 && minor >= 4 ) ? GL_TRUE : GL_FALSE; + GLEW_VERSION_1_3 = GLEW_VERSION_1_4 == GL_TRUE || ( major == 1 && minor >= 3 ) ? GL_TRUE : GL_FALSE; + GLEW_VERSION_1_2_1 = GLEW_VERSION_1_3 == GL_TRUE ? GL_TRUE : GL_FALSE; + GLEW_VERSION_1_2 = GLEW_VERSION_1_2_1 == GL_TRUE || ( major == 1 && minor >= 2 ) ? GL_TRUE : GL_FALSE; + GLEW_VERSION_1_1 = GLEW_VERSION_1_2 == GL_TRUE || ( major == 1 && minor >= 1 ) ? GL_TRUE : GL_FALSE; + } + + /* query opengl extensions string */ + extStart = glGetString(GL_EXTENSIONS); + if (extStart == 0) + extStart = (const GLubyte*)""; + extEnd = extStart + _glewStrLen(extStart); + + /* initialize extensions */ |