Cyclone iv e vga ?

Assuming what you are attempting to do is frame buffered based maybe this will help: http://www.alterawiki.com/wiki/modular_sgdma_video_frame_buffer

I'm not sure what you are actually asking about though, you described your end goal without mentioning what you are struggling with. If this is a school project and you are looking for a completed solution you probably won't find one (and your prof might be reading this....)