Stefan Dösinger : wined3d: Prefer aux buffer matches over alpha matches.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 77204574d19b1969ca0810c7522e6bee5a0c4026
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=77204574d19b1969ca0810c7522e6bee5a0c4026

Author: Stefan Dösinger <stefan at codeweavers.com>
Date:   Thu Aug 14 16:47:19 2008 -0500

wined3d: Prefer aux buffer matches over alpha matches.

Half Life 2 uses D3DFMT_X8R8G8B8 for the back buffer, but macos
supports aux buffers only on D3DFMT_A8R8G8B8. I think having aux
buffers is more important right now than having a precise alpha
match.

---

 dlls/wined3d/context.c |   12 +++++++-----
 1 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/dlls/wined3d/context.c b/dlls/wined3d/context.c
index 68ec2a7..739ddb2 100644
--- a/dlls/wined3d/context.c
+++ b/dlls/wined3d/context.c
@@ -129,17 +129,19 @@ static int WineD3D_ChoosePixelFormat(IWineD3DDeviceImpl *This, HDC hdc, WINED3DF
         BOOL exact_alpha;
         BOOL exact_color;
     } matches[] = {
-        /* First, try without aux buffers - this is the most common cause
-         * for not finding a pixel format. Also some drivers(the open source ones)
+        /* First, try without alpha match buffers. MacOS supports aux buffers only
+         * on A8R8G8B8, and we prefer better offscreen rendering over an alpha match.
+         * Then try without aux buffers - this is the most common cause for not
+         * finding a pixel format. Also some drivers(the open source ones)
          * only offer 32 bit ARB pixel formats. First try without an exact alpha
          * match, then try without an exact alpha and color match.
          */
-        { TRUE,  TRUE,  TRUE  },
         { FALSE, TRUE,  TRUE  },
-        { TRUE,  FALSE, TRUE  },
-        { TRUE,  FALSE, FALSE },
+        { TRUE,  TRUE,  TRUE  },
         { FALSE, FALSE, TRUE  },
         { FALSE, FALSE, FALSE },
+        { TRUE,  FALSE, TRUE  },
+        { TRUE,  FALSE, FALSE },
     };
 
     int i = 0;