sci-chemistry/xcrysden: disable OpenGL accumulation buffer

By default XCrySDen uses ToGL to request an OpenGL accumulation buffer,
which often causes problems (i.e., failing to launch at all) when
running under XWayland.

Signed-off-by: Patrick J. Taylor <patrick.joseph.taylor@gmail.com>

sci-chemistry/xcrysden/files/xcrysden-1.6.2-disable-accum-buffer.patch

@@ -0,0 +1,15 @@
+Disable OpenGL accumulation buffer for XWayland compatibility
+
+diff --git a/Tcl/custom-definitions b/Tcl/custom-definitions
+index 5267760..1221749 100644
+--- a/Tcl/custom-definitions
++++ b/Tcl/custom-definitions
+@@ -18,7 +18,7 @@
+ # $XCRYSDEN_TOPDIR/Tcl/toglOpt.tcl
+ # ------------------------------------------------------------------------
+ 
+-#set toglOpt(accum)  false 
++set toglOpt(accum)  false 
+ #set toglOpt(stereo) none
+ 
+ 

sci-chemistry/xcrysden/xcrysden-1.6.2-r2.ebuild

@@ -35,6 +35,7 @@ PATCHES=(
 	"${FILESDIR}/${P}-Togl-lib.patch"
 	"${FILESDIR}/${P}-wrapper-paths.patch"
 	"${FILESDIR}/${P}-c23.patch"
+	"${FILESDIR}/${P}-disable-accum-buffer.patch"
 )
 
 src_prepare() {