Add isCreated to QOpenGLTextureBlitter

Change-Id: Icb1a0354ac1caee38e3cb0cba6d7daec99d66c54
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>

src/gui/opengl/qopengltextureblitter.cpp

@@ -282,6 +282,12 @@ bool QOpenGLTextureBlitter::create()
     return true;
 }
 
+bool QOpenGLTextureBlitter::isCreated() const
+{
+    Q_D(const QOpenGLTextureBlitter);
+    return d->program;
+}
+
 void QOpenGLTextureBlitter::destroy()
 {
     Q_D(QOpenGLTextureBlitter);

src/gui/opengl/qopengltextureblitter_p.h

@@ -62,6 +62,7 @@ public:
     };
 
     bool create();
+    bool isCreated() const;
     void destroy();
 
     void bind();