Introduce new platform capability ThreadedOpenGL.

Lets the platform plugin advertise whether it's safe to use OpenGL from
a different thread. With XCB we only advertise this if we have a
reasonably new XCB libary, as older versions suffer from the
xcb_wait_for_reply() blocking bug, which cause GL rendering in a
separate to stall when using Mesa drivers.

Change-Id: I4829df7e583a1c8aed218ae13a159d21266cc594
Reviewed-on: http://codereview.qt.nokia.com/3613
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/src/plugins/platforms/windows/qwindowsintegration.cpp b/src/plugins/platforms/windows/qwindowsintegration.cpp
index 70c6c0b4db..fdcc05abe0 100644
--- a/src/plugins/platforms/windows/qwindowsintegration.cpp
+++ b/src/plugins/platforms/windows/qwindowsintegration.cpp
@@ -167,6 +167,10 @@ bool QWindowsIntegration::hasCapability(QPlatformIntegration::Capability cap) co
     switch (cap) {
     case ThreadedPixmaps:
         return true;
+    case OpenGL:
+        return true;
+    case ThreadedOpenGL:
+        return true;
     default:
         return QPlatformIntegration::hasCapability(cap);
     }