abstract public void SetPixels(VGint dx, VGint dy, VGImage src, VGint sx, VGint sy, VGint width, VGint height);
abstract public void GetPixels(VGImage dst, VGint dx, VGint dy, VGint sx, VGint sy, VGint width, VGint height);
abstract public void DrawImage(VGImage image);
abstract public void CopyImage(VGImage dst, VGint dx, VGint dy, VGImage src, VGint sx, VGint sy, VGint width, VGint height, VGboolean dither);
abstract public VGImage GetParent(VGImage image);
abstract public VGImage ChildImage(VGImage parent, VGint x, VGint y, VGint width, VGint height);
abstract public void GetImageSubData(VGImage image, object data, VGint dataStride, VGImageFormat dataFormat, VGint x, VGint y, VGint width, VGint height);