Fixed cleanup of glyph cache textures in the GL 2 engine.

This could potentially crash when a context was destroyed before
the actual font engine holding the QGLTextureGlyphCache was destroyed.

Reviewed-by: Samuel

1 files changed, 4 insertions, 0 deletions

diff --git a/src/opengl/qgl_p.h b/src/opengl/qgl_p.h
index 85e9bd7..ac19d64 100644
--- a/src/opengl/qgl_p.h
+++ b/src/opengl/qgl_p.h
@@ -421,6 +421,10 @@ public:
         removeShare(oldContext);
     }
 
+    QList<const QGLContext *> shares(const QGLContext *context) {
+        return reg.values(context);
+    }
+
 private:
     QGLSharingHash reg;
 };