3 files changed, 25 insertions, 1 deletions
diff --git a/src/gui/kernel/qplatformintegration_qpa.cpp b/src/gui/kernel/qplatformintegration_qpa.cpp
index ec9a7fc983..e867e4e588 100644
--- a/src/gui/kernel/qplatformintegration_qpa.cpp
+++ b/src/gui/kernel/qplatformintegration_qpa.cpp
@@ -172,6 +172,27 @@ QPlatformNativeInterface * QPlatformIntegration::nativeInterface() const
 */
 
 /*!
+    \enum QPlatformIntegration::Capability
+
+    Capabilities are used to determing specific features of a platform integration
+
+    \value ThreadedPixmaps The platform uses a pixmap implementation that is reentrant
+    and can be used from multiple threads, like the raster paint engine and QImage based
+    pixmaps.
+
+    \value OpenGL The platform supports OpenGL
+
+    \value ThreadedOpenGL The platform supports using OpenGL outside the GUI thread.
+
+    \value SharedGraphicsCache The platform supports a shared graphics cache
+
+    \value BufferQueueingOpenGL The OpenGL implementation on the platform will queue
+    up buffers when swapBuffers() is called and block only when its buffer pipeline
+    is full, rather than block immediately.
+ */
+
+
+/*!
 
     \fn QAbstractEventDispatcher *QPlatformIntegration::guiThreadEventDispatcher() const = 0
 
diff --git a/src/gui/kernel/qplatformintegration_qpa.h b/src/gui/kernel/qplatformintegration_qpa.h
index f3dc43094a..efaf495b81 100644
--- a/src/gui/kernel/qplatformintegration_qpa.h
+++ b/src/gui/kernel/qplatformintegration_qpa.h
@@ -74,7 +74,9 @@ public:
         ThreadedPixmaps = 1,
         OpenGL = 2,
         ThreadedOpenGL = 3,
-        SharedGraphicsCache = 4
+        SharedGraphicsCache = 4,
+        BufferQueueingOpenGL = 5
+
     };
 
     virtual ~QPlatformIntegration() { }
diff --git a/src/plugins/platforms/cocoa/qcocoaintegration.mm b/src/plugins/platforms/cocoa/qcocoaintegration.mm
index 3abfe2c990..fb8e487029 100644
--- a/src/plugins/platforms/cocoa/qcocoaintegration.mm
+++ b/src/plugins/platforms/cocoa/qcocoaintegration.mm
@@ -150,6 +150,7 @@ bool QCocoaIntegration::hasCapability(QPlatformIntegration::Capability cap) cons
     case ThreadedPixmaps: return true;
     case OpenGL : return true;
     case ThreadedOpenGL : return true;
+    case BufferQueueingOpenGL: return true;
     default: return QPlatformIntegration::hasCapability(cap);
     }
 }