Patent ID: 6774912
Filing Date: 2004-08-10
Classification: G06F,G09G

Abstract:
A method of controlling a display controller apparatus connected to a computer and having at least two display device outputs, comprising the steps of:storing in a video memory of said apparatus a main display surface and a YUV format video surface; causing a first display controller of said apparatus to access said main display surface and said YUV format video surface and to output a display signal to a first display, the first display controller including a scaler unit and an overlaying unit; causing said first display controller to overlay said YUV format video surface within said main display surface; detecting an overlay request generated in said computer, said overlay request indicating that a YUV format video surface is to be overlaid over a main display surface; responsive to said detecting of said overlay request, causing a second display controller to access said YUV format video surface from said video memory and to output a display signal providing full screen output to a second display, wherein said output to a first display and said output to a second display occur substantially simultaneously; wherein said second display controller is caused to stop displaying a surface other than said YUV format video surface and to begin displaying said YUV format video surface when said overlay request is detected.