[2/6] winex11.drv: Try to get an opengl visual with aux buffers

[Stefan Dösinger]

I don't know if that patch wasn't applied because other patches of my patchset 
weren't applied, or because something is wrong with this patch. If something 
is wrong with this patch please tell me
-------------- next part --------------
From 029e9756abed6c2647950f86e9227ba47d366ebe Mon Sep 17 00:00:00 2001
From: Stefan Doesinger <stefan at codeweavers.com>
Date: Tue, 27 Feb 2007 15:53:43 +0100
Subject: [PATCH] winex11.drv: Try to get an opengl visual with aux buffers

Applications may profit from auxilliary buffers. Because we have to find
the visual at initialization time try to find a visual with aux buffers
first, if none is found fall back to the usual default visual without
aux buffers
---
 dlls/winex11.drv/opengl.c |   35 +++++++++++++++++++++++------------
 1 files changed, 23 insertions(+), 12 deletions(-)

diff --git a/dlls/winex11.drv/opengl.c b/dlls/winex11.drv/opengl.c
index fdb92ae..9c1060a 100644
--- a/dlls/winex11.drv/opengl.c
+++ b/dlls/winex11.drv/opengl.c
@@ -3083,33 +3083,44 @@ BOOL X11DRV_SwapBuffers(X11DRV_PDEVICE *physDev)
 XVisualInfo *X11DRV_setup_opengl_visual( Display *display )
 {
     XVisualInfo *visual = NULL;
-    /* In order to support OpenGL or D3D, we require a double-buffered visual and stencil buffer support, */
-    int dblBuf[] = {GLX_RGBA,GLX_DEPTH_SIZE, 24, GLX_STENCIL_SIZE, 8, GLX_ALPHA_SIZE, 8, GLX_DOUBLEBUFFER, None};
+    /* In order to support OpenGL or D3D, we require a double-buffered visual and stencil buffer support,
+     * WineD3D and Some applications can make use of aux buffers
+     */
+    int dblBuf[] = {GLX_RGBA,GLX_DEPTH_SIZE, 24, GLX_STENCIL_SIZE, 8, GLX_ALPHA_SIZE, 8, GLX_AUX_BUFFERS, 1, GLX_DOUBLEBUFFER, None};
     if (!has_opengl()) return NULL;
 
     wine_tsx11_lock();
     visual = pglXChooseVisual(display, DefaultScreen(display), dblBuf);
     wine_tsx11_unlock();
     if (visual == NULL) {
-        /* fallback to 16 bits depth, no alpha */
-        int dblBuf2[] = {GLX_RGBA,GLX_DEPTH_SIZE, 16, GLX_STENCIL_SIZE, 8, GLX_DOUBLEBUFFER, None};
-        WARN("Failed to get a visual with at least 24 bits depth\n");
+        /* Try without aux buffers */
+        int dblBuf2[] = {GLX_RGBA,GLX_DEPTH_SIZE, 24, GLX_STENCIL_SIZE, 8, GLX_ALPHA_SIZE, 8, GLX_DOUBLEBUFFER, None};
+        WARN("Failed to get a visual with at least one aux buffer\n");
 
         wine_tsx11_lock();
         visual = pglXChooseVisual(display, DefaultScreen(display), dblBuf2);
         wine_tsx11_unlock();
         if (visual == NULL) {
-            /* fallback to no stencil */
-            int dblBuf2[] = {GLX_RGBA,GLX_DEPTH_SIZE, 16, GLX_DOUBLEBUFFER, None};
-            WARN("Failed to get a visual with at least 8 bits of stencil\n");
+            /* fallback to 16 bits depth, no alpha */
+            int dblBuf3[] = {GLX_RGBA,GLX_DEPTH_SIZE, 16, GLX_STENCIL_SIZE, 8, GLX_DOUBLEBUFFER, None};
+            WARN("Failed to get a visual with at least 24 bits depth\n");
 
             wine_tsx11_lock();
-            visual = pglXChooseVisual(display, DefaultScreen(display), dblBuf2);
+            visual = pglXChooseVisual(display, DefaultScreen(display), dblBuf3);
             wine_tsx11_unlock();
             if (visual == NULL) {
-                /* This should only happen if we cannot find a match with a depth size 16 */
-                FIXME("Failed to find a suitable visual\n");
-                return visual;
+                /* fallback to no stencil */
+                int dblBuf4[] = {GLX_RGBA,GLX_DEPTH_SIZE, 16, GLX_DOUBLEBUFFER, None};
+                WARN("Failed to get a visual with at least 8 bits of stencil\n");
+
+                wine_tsx11_lock();
+                visual = pglXChooseVisual(display, DefaultScreen(display), dblBuf4);
+                wine_tsx11_unlock();
+                if (visual == NULL) {
+                    /* This should only happen if we cannot find a match with a depth size 16 */
+                    FIXME("Failed to find a suitable visual\n");
+                    return visual;
+                }
             }
         }
     }
-- 
1.4.4.3