From 0168f7eacf85a650b5fed59aa13f2a4e0628c230 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fredrik=20H=C3=B6glund?= <fredrik@kde.org>
Date: Tue, 9 Apr 2013 18:55:21 +0200
Subject: [PATCH] kwin/glx: Avoid MSAA configs in initDrawableConfigs()

This is the same fix that was applied to initBufferConfigs() in commit
6cf057777555a5d0c834de3a0165a62916cf3b40.

CCBUG: 315089
---
 glxbackend.cpp | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/glxbackend.cpp b/glxbackend.cpp
index be1149780c..acb564d7b7 100644
--- a/glxbackend.cpp
+++ b/glxbackend.cpp
@@ -323,11 +323,13 @@ bool GlxBackend::initDrawableConfigs()
     GLXFBConfig *fbconfigs = glXGetFBConfigs(display(), DefaultScreen(display()), &cnt);
 
     for (int i = 0; i <= 32; i++) {
-        int back, stencil, depth, caveat, alpha, mipmap, rgba;
+        int back, stencil, depth, caveat, alpha, mipmap, msaa_buffers, msaa_samples, rgba;
         back = INT_MAX;
         stencil = INT_MAX;
         depth = INT_MAX;
         caveat = INT_MAX;
+        msaa_buffers = INT_MAX;
+        msaa_samples = INT_MAX;
         mipmap = 0;
         rgba = 0;
         fbcdrawableinfo[ i ].fbconfig = NULL;
@@ -395,12 +397,27 @@ bool GlxBackend::initDrawableConfigs()
                                  GLX_CONFIG_CAVEAT, &caveat_value);
             if (caveat_value > caveat)
                 continue;
+
+            int msaa_buffers_value;
+            glXGetFBConfigAttrib(display(), fbconfigs[j], GLX_SAMPLE_BUFFERS,
+                                 &msaa_buffers_value);
+            if (msaa_buffers_value > msaa_buffers)
+                continue;
+
+            int msaa_samples_value;
+            glXGetFBConfigAttrib(display(), fbconfigs[j], GLX_SAMPLES,
+                                 &msaa_samples_value);
+            if (msaa_samples_value > msaa_samples)
+                continue;
+
             // ok, config passed all tests, it's the best one so far
             fbcdrawableinfo[ i ].fbconfig = fbconfigs[ j ];
             caveat = caveat_value;
             back = back_value;
             stencil = stencil_value;
             depth = depth_value;
+            msaa_buffers = msaa_buffers_value;
+            msaa_samples = msaa_samples_value;
             mipmap = 0;
             glXGetFBConfigAttrib(display(), fbconfigs[ j ],
                                  GLX_BIND_TO_TEXTURE_TARGETS_EXT, &value);