Patent ID: 6067068
Filing Date: 2000-05-23
Classification: G06F,G09G

Abstract:
A method for scrolling a first image inside a window of a second image displayed on a display screen comprising the steps of:storing the second image in a VRAM;designating display addresses in the VRAM corresponding to a location of the window on the display screen;storing the first image in a memory different from the VRAM;defining a pointer indicating a first portion of the first image to be displayed in the window;copying the first portion of the first image from the memory to the VRAM at the display addresses in the VRAM based on the pointer;displaying the first portion of the first image in the window of the second image;accepting user interface commands to scroll the first image and changing a value of the pointer in response thereto, the changed value indicating a second portion of the first image to be displayed in the window; andrepeating said copying step and said displaying step with respect to the second portion.