vcl: Add BitmapInfoAccess for bitmaps' metadata access

Change-Id: Iec9f8c7d8f7cded0aef9e017373e44387dc0b05c
vcl: Use right size to draw native GTK window background

Change-Id: Id446d20599f072f657c6106d6c6457fce08830e6
vcl: Reset data buffer after resizing bitmap on GPU

Change-Id: I516cdbc466f3d6427e36fea8c5cdbe718ce7d0ea