1 files changed, 7 insertions, 0 deletions
diff --git a/src/gui/kernel/qopenglcontext_p.h b/src/gui/kernel/qopenglcontext_p.h
index 33e930eabe..57f70356b8 100644
--- a/src/gui/kernel/qopenglcontext_p.h
+++ b/src/gui/kernel/qopenglcontext_p.h
@@ -69,6 +69,7 @@ QT_BEGIN_NAMESPACE
 
 class QOpenGLFunctions;
 class QOpenGLContext;
+class QOpenGLFramebufferObject;
 class QOpenGLMultiGroupSharedResource;
 
 class Q_GUI_EXPORT QOpenGLSharedResource
@@ -212,6 +213,7 @@ public:
         , workaround_missingPrecisionQualifiers(false)
         , active_engine(0)
         , qgl_current_fbo_invalid(false)
+        , qgl_current_fbo(Q_NULLPTR)
         , defaultFboRedirect(0)
     {
         requestedFormat = QSurfaceFormat::defaultFormat();
@@ -250,6 +252,11 @@ public:
 
     bool qgl_current_fbo_invalid;
 
+    // Set and unset in QOpenGLFramebufferObject::bind()/unbind().
+    // (Only meaningful for QOGLFBO since an FBO might be bound by other means)
+    // Saves us from querying the driver for the current FBO in most paths.
+    QOpenGLFramebufferObject *qgl_current_fbo;
+
     QVariant nativeHandle;
     GLuint defaultFboRedirect;