Ken Thomases : winemac: Defer attaching OpenGL context to a view which is zero-sized or outside its window 's bounds.

[Alexandre Julliard]

Module: wine
Branch: stable
Commit: 33b077477ac8d875ef7fa56fbb91349741202000
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=33b077477ac8d875ef7fa56fbb...

Author: Ken Thomases <ken(a)codeweavers.com>
Date:   Wed Nov 20 15:35:37 2013 -0600

winemac: Defer attaching OpenGL context to a view which is zero-sized or outside its window's bounds.

That fails with the dread "invalid drawable" message.

(cherry picked from commit 682ed91017e6aa043feaf0c70a34118445e65d1e)

---

 dlls/winemac.drv/cocoa_opengl.m |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/dlls/winemac.drv/cocoa_opengl.m b/dlls/winemac.drv/cocoa_opengl.m
index b678cae..45799db 100644
--- a/dlls/winemac.drv/cocoa_opengl.m
+++ b/dlls/winemac.drv/cocoa_opengl.m
@@ -123,14 +123,15 @@ void macdrv_make_context_current(macdrv_opengl_context c, macdrv_view v)
         context.needsUpdate = FALSE;
         if (view)
         {
-            __block BOOL windowHasDevice;
+            __block BOOL viewIsValidDrawable;
 
             macdrv_add_view_opengl_context(v, c);
 
             OnMainThread(^{
-                windowHasDevice = [[view window] windowNumber] > 0;
+                viewIsValidDrawable = [[view window] windowNumber] > 0 &&
+                                      !NSIsEmptyRect([view visibleRect]);
             });
-            if (windowHasDevice)
+            if (viewIsValidDrawable)
             {
                 [context setView:view];
                 [context setLatentView:nil];