diff options
| author | Brian <brian.paul@tungstengraphics.com> | 2008-03-27 21:11:45 -0600 |
|---|---|---|
| committer | Brian <brian.paul@tungstengraphics.com> | 2008-03-27 21:11:45 -0600 |
| commit | 5935b16ff5d8cbe07c97f2990e281a9c5986d0a1 (patch) | |
| tree | a2dcda7c28312727ed57d938c0f6f33b613b67ed | |
| parent | 39038c11699bbc9baab744542e96d54e91cb452a (diff) | |
If visual is 32bpp, set visual->alphaBits = 8.
This works since we always use XImages for color buffers. It wouldn't always
work for Windows/Pixmaps.
| -rw-r--r-- | src/gallium/winsys/xlib/xm_api.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/gallium/winsys/xlib/xm_api.c b/src/gallium/winsys/xlib/xm_api.c index 6b46327e21..a82d3c990e 100644 --- a/src/gallium/winsys/xlib/xm_api.c +++ b/src/gallium/winsys/xlib/xm_api.c @@ -511,6 +511,14 @@ initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b, return GL_FALSE; } v->mesa_visual.indexBits = 0; + + if (v->BitsPerPixel == 32) { + /* We use XImages for all front/back buffers. If an X Window or + * X Pixmap is 32bpp, there's no guarantee that the alpha channel + * will be preserved. For XImages we're in luck. + */ + v->mesa_visual.alphaBits = 8; + } } /* |