[patch] x11-servers/xorg-server: glamor: Fix dashed line rendering (from upstream)

[Alexey Dokuchaev]

Hi there,

May I commit the attached patch?  It fixes displaying dashed and dotted
lines in 2D applications (e.g. bounding boxes around active widgets e.g.
buttons) which are drawn as solid lines without this patch.  Found via
openSUSE's xorg-x11-server package.

./danfe
-------------- next part --------------
From: Eric Anholt <eric at anholt.net>
Date: Wed Mar 15 17:51:46 2017 -0700
Subject: [PATCH]glamor: Fix dashed line rendering.
Patch-mainline: fe0b297420fc1de8a7fab28457d0864b3182e967
References: boo#1021803
Signed-off-by: Max Staudt <mstaudt at suse.de>

We were binding the screen pixmap as the dash and sampling its alpha,
which is usually just 1.0 (no dashing at all).

Please cherry-pick this to active stable branches.

Signed-off-by: Eric Anholt <eric at anholt.net>
Reviewed-by: Keith Packard <keithp at keithp.com>
Reviewed-by: Michel D??nzer <michel.daenzer at amd.com>

--- glamor/glamor_dash.c.orig	2016-07-18 19:08:16 UTC
+++ glamor/glamor_dash.c
@@ -146,7 +146,7 @@ glamor_dash_setup(DrawablePtr drawable, GCPtr gc)
         goto bail;
 
     dash_pixmap = glamor_get_dash_pixmap(gc);
-    dash_priv = glamor_get_pixmap_private(pixmap);
+    dash_priv = glamor_get_pixmap_private(dash_pixmap);
 
     if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(dash_priv))
         goto bail;