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kwin/glx: Avoid MSAA configs in initBufferConfigs()

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It appears that we're accidentally choosing an MSAA config with the
Intel driver in Mesa 9.0. So change the algorithm to take the values
of GLX_SAMPLES and GLX_SAMPLE_BUFFERS into account.

Found by Kenneth Graunke.
This commit is contained in:
Fredrik Höglund 2012-10-30 18:20:00 +01:00
parent e4d970ef5f
commit 70c35b8284
1 changed files with 20 additions and 1 deletions
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21
scene_opengl_glx.cpp
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@ -270,12 +270,15 @@ bool SceneOpenGL::initBufferConfigs()
fbcbuffer_nondb = NULL;
for (int i = 0; i < 2; i++) {
int back, stencil, depth, caveat, alpha;
int back, stencil, depth, caveat, msaa_buffers, msaa_samples, alpha;
back = i > 0 ? INT_MAX : 1;
stencil = INT_MAX;
depth = INT_MAX;
caveat = INT_MAX;
msaa_buffers = INT_MAX;
msaa_samples = INT_MAX;
alpha = 0;
for (int j = 0; j < cnt; j++) {
XVisualInfo *vi;
int visual_depth;
@ -322,10 +325,26 @@ bool SceneOpenGL::initBufferConfigs()
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;
back = back_value;
stencil = stencil_value;
depth = depth_value;
caveat = caveat_value;
msaa_buffers = msaa_buffers_value;
msaa_samples = msaa_samples_value;
if (i > 0)
fbcbuffer_nondb = fbconfigs[ j ];
else