Date: Sun, 11 May 2003 19:59:06 +0300 From: Pasi K?rkk?inen Subject: [PATCH] fix SDL OpenGL segfault with DRI/Mesa drivers and Glew Hello! The attached patch fixes a bug in SDL which causes SDL to crash in X11_GL_Shutdown() if you are using DRI/Mesa drivers AND glew (http://glew.sf.net). The bug is caused by a namespace collision affecting dlsym() to fetch wrong pointer for glXReleaseBuffersMESA() (uninitialized pointer from glew because the extension is NOT supported by the driver) and then SDL calling it in X11_GL_Shutdown(). SDL should check if the glXReleaseBuffersMESA() is really supported by the driver (from the extensions string) before calling it. Attached patch adds extension string parsing to check if glXReleaseBuffersMESA() is really supported (and this way prevents the segfault). Availability of the extensions should be _always_ checked from the extensions string rather than using dlsym()! Please add it to the next version of SDL. Thanks to gltron and author of glew to help fixing this.

.TH "SDL_ShowCursor" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" 
.SH "NAME"
SDL_ShowCursor\- Toggle whether or not the cursor is shown on the screen\&.
.SH "SYNOPSIS"
.PP
\fB#include "SDL\&.h"
.sp
\fBint \fBSDL_ShowCursor\fP\fR(\fBint toggle\fR);
.SH "DESCRIPTION"
.PP
Toggle whether or not the cursor is shown on the screen\&. Passing \fBSDL_ENABLE\fP displays the cursor and passing \fBSDL_DISABLE\fP hides it\&. The current state of the mouse cursor can be queried by passing \fBSDL_QUERY\fP, either \fBSDL_DISABLE\fP or \fBSDL_ENABLE\fP will be returned\&.
.PP
The cursor starts off displayed, but can be turned off\&.
.SH "RETURN VALUE"
.PP
Returns the current state of the cursor\&.
.SH "SEE ALSO"
.PP
\fI\fBSDL_CreateCursor\fP\fR, \fI\fBSDL_SetCursor\fP\fR
...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01