xserver/fb fbedgeimp.h,1.1,1.2
Carl Worth <xserver-commit-u7BhqnqprCWvj1b/[email protected]>
| Newsgroups | gmane.comp.freedesktop.xserver.cvs |
|---|---|
| Message-ID | <[email protected]> |
Committed by: cworth
Update of /cvs/xserver/xserver/fb
In directory gabe:/tmp/cvs-serv21522/fb
Modified Files:
fbedgeimp.h
Log Message:
* fb/fbedgeimp.h (rasterizeEdges): Avoid buffer ovverrun when
trapezoid's right edge is on a pixel boundary.
Index: fbedgeimp.h
===================================================================
RCS file: /cvs/xserver/xserver/fb/fbedgeimp.h,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -d -r1.1 -r1.2
--- fbedgeimp.h 29 Jul 2004 08:10:15 -0000 1.1
+++ fbedgeimp.h 21 Jan 2005 18:40:51 -0000 1.2
@@ -104,7 +104,11 @@
AddAlpha (N_X_FRAC(N_BITS));
StepAlpha;
}
- AddAlpha (rxs);
+ /* Do not add in a 0 alpha here. This check is
+ * necessary to avoid a buffer overrun, (when rx
+ * is exactly on a pixel boundary). */
+ if (rxs)
+ AddAlpha (rxs);
}
}
#endif