x11: Use the GLXFBConfig to set the visual of an OpenGL canvas#364
Merged
mflatt merged 1 commit intoracket:masterfrom Mar 23, 2026
Merged
x11: Use the GLXFBConfig to set the visual of an OpenGL canvas#364mflatt merged 1 commit intoracket:masterfrom
mflatt merged 1 commit intoracket:masterfrom
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Without doing this, the visual will not necessarily match that required by GLX, which prevents certain features from working correctly, most notably multisampling.
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Thanks! This looks very plausible to me, but I have not yet had a chance to try it out. I expect to take a closer look soon. |
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Currently, when creating an OpenGL
canvas%under X11,racket/guidoes not properly arrange for the X window’sVisualto be the one GLX selects for a givenGLXFBConfig. Without doing this, GLX may silently fall back to a more limited config, which prevents certain features from working correctly (most notably multisampling). This PR fixes the issue by explicitly setting the GTK widget’s visual before it is realized, which ensures the X window’s visual will be initialized appropriately.