Silicon Graphics

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(-) OpenGL Programming Guide
(-) Appendix DThe OpenGL Extension to the X Window System

Initialization

Use glXQueryExtension() and glXQueryVersion() to determine whether the GLX extension is defined for an X server, and if so, which version is present. The glXChooseVisual() routine returns a pointer to an XVisualInfo structure describing the visual that best meets the client's specified attributes. You can query a visual about its support of a particular OpenGL attribute with glXGetConfig().

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OpenGL Programming Guide

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