wgl: Lookup framebuffers by HWND whenever possible.

[mesa.git] / src / gallium / state_trackers / wgl / shared / stw_framebuffer.c

diff --git a/src/gallium/state_trackers/wgl/shared/stw_framebuffer.c b/src/gallium/state_trackers/wgl/shared/stw_framebuffer.c
index 7d0e8f46482bae963e0e9247c572595560c49388..78a2dbc4d7cd0ff34a49d0e29556be71ebfb57a8 100644 (file)
--- a/src/gallium/state_trackers/wgl/shared/stw_framebuffer.c
+++ b/src/gallium/state_trackers/wgl/shared/stw_framebuffer.c
@@ -300,8 +300,18 @@ struct stw_framebuffer *
 stw_framebuffer_from_hdc_locked(
    HDC hdc )
 {
+   HWND hwnd;
    struct stw_framebuffer *fb;
 
+   /* 
+    * Some applications create and use several HDCs for the same window, so 
+    * looking up the framebuffer by the HDC is not reliable. Use HWND whenever
+    * possible.
+    */ 
+   hwnd = WindowFromDC(hdc);
+   if(hwnd)
+      return stw_framebuffer_from_hwnd_locked(hwnd);
+   
    for (fb = stw_dev->fb_head; fb != NULL; fb = fb->next)
       if (fb->hDC == hdc)
          break;