I assume that you're using the DSP in the OMAP to spit out pre-saved YUV graphics to the main display which allows for very fast full-screen updates, as it appealing the the DSPs specialization. Aren't there DSP routines to convert RGB input to YUV readily? If so, couldn't they be used to convert RGB to the equivalent YUV colourspace and potentially speed up full-screen viewing for 'regular' RGB apps? Is this what libqbase already does?