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glxewInit check for current X11 display rather than crashing
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parent
7f92f9adf7
commit
2c6ad763af
@ -14,9 +14,13 @@ GLboolean glxewGetExtension (const char* name)
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GLenum glxewInit ()
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{
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Display* display;
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int major, minor;
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const GLubyte* extStart;
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const GLubyte* extEnd;
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/* check for a display */
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display = glXGetCurrentDisplay();
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if (display == NULL) return GLEW_ERROR_NO_GLX_DISPLAY;
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/* initialize core GLX 1.2 */
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if (_glewInit_GLX_VERSION_1_2()) return GLEW_ERROR_GLX_VERSION_11_ONLY;
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/* initialize flags */
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@ -26,7 +30,7 @@ GLenum glxewInit ()
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GLXEW_VERSION_1_3 = GL_TRUE;
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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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glXQueryVersion(display, &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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@ -46,7 +50,7 @@ GLenum glxewInit ()
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/* query GLX extension string */
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extStart = 0;
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if (glXGetCurrentDisplay != NULL)
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extStart = (const GLubyte*)glXGetClientString(glXGetCurrentDisplay(), GLX_EXTENSIONS);
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extStart = (const GLubyte*)glXGetClientString(display, GLX_EXTENSIONS);
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if (extStart == 0)
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extStart = (const GLubyte *)"";
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extEnd = extStart + _glewStrLen(extStart);
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@ -6,6 +6,7 @@
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#define GLEW_ERROR_NO_GL_VERSION 1 /* missing GL version */
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#define GLEW_ERROR_GL_VERSION_10_ONLY 2 /* Need at least OpenGL 1.1 */
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#define GLEW_ERROR_GLX_VERSION_11_ONLY 3 /* Need at least GLX 1.2 */
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#define GLEW_ERROR_NO_GLX_DISPLAY 4 /* Need GLX display for GLX support */
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/* string codes */
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#define GLEW_VERSION 1
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