mirror of
https://github.com/Perlmint/glew-cmake.git
synced 2025-11-04 06:15:10 +00:00
a8ddad81de
git-svn-id: https://glew.svn.sourceforge.net/svnroot/glew/trunk/glew@548 783a27ee-832a-0410-bc00-9f386506c6dd
53 lines
1.5 KiB
C
53 lines
1.5 KiB
C
/* ------------------------------------------------------------------------ */
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GLboolean glxewGetExtension (const char* name)
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{
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GLubyte* p;
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GLubyte* end;
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GLuint len;
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if (glXGetCurrentDisplay == NULL) return GL_FALSE;
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len = _glewStrLen((const GLubyte*)name);
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p = (GLubyte*)glXGetClientString(glXGetCurrentDisplay(), GLX_EXTENSIONS);
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if (0 == p) return GL_FALSE;
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end = p + _glewStrLen(p);
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while (p < end)
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{
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GLuint n = _glewStrCLen(p, ' ');
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if (len == n && _glewStrSame((const GLubyte*)name, p, n)) return GL_TRUE;
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p += n+1;
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}
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return GL_FALSE;
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}
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GLenum glxewContextInit (GLXEW_CONTEXT_ARG_DEF_LIST)
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{
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int major, minor;
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/* initialize core GLX 1.2 */
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if (_glewInit_GLX_VERSION_1_2(GLEW_CONTEXT_ARG_VAR_INIT)) return GLEW_ERROR_GLX_VERSION_11_ONLY;
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/* initialize flags */
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CONST_CAST(GLXEW_VERSION_1_0) = GL_TRUE;
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CONST_CAST(GLXEW_VERSION_1_1) = GL_TRUE;
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CONST_CAST(GLXEW_VERSION_1_2) = GL_TRUE;
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CONST_CAST(GLXEW_VERSION_1_3) = GL_TRUE;
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CONST_CAST(GLXEW_VERSION_1_4) = GL_TRUE;
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/* query GLX version */
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glXQueryVersion(glXGetCurrentDisplay(), &major, &minor);
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if (major == 1 && minor <= 3)
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{
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switch (minor)
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{
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case 3:
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CONST_CAST(GLXEW_VERSION_1_4) = GL_FALSE;
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break;
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case 2:
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CONST_CAST(GLXEW_VERSION_1_4) = GL_FALSE;
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CONST_CAST(GLXEW_VERSION_1_3) = GL_FALSE;
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break;
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default:
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return GLEW_ERROR_GLX_VERSION_11_ONLY;
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break;
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}
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}
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/* initialize extensions */
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