Efficient redrawing of animated windows

Details Efficient redrawing of animated windows Efficient redrawing of animated windows

1998-03-23

2000-06-13

dela Torre, Crescelle N.

Computer graphics processing and selective visual display system

Display driving control circuitry

Controlling the condition of display elements

345473, G06F 314

Patent

active

060755326

ABSTRACT:
A method, system and computer program product for repainting the image uncovered by a character of an animated sequence on a desktop in a windows-based operating system. Before a character in a frame of an animated sequence is displayed, a boundary box is specified. Then, a bitmap of the image within the area enclosed by the boundary box is stored and the character in the frame of the animated character is displayed. Next, the area within the boundary box that is exposed by the next frame of the character's animated sequence is determined, the image area from the stored bitmap that corresponds to the area exposed within the boundary box is copied, the display is painted with the copied image area, and character in the next frame of the animated sequence is displayed. If the character in the next frame of the animated sequence is outside the current boundary box, a new boundary box is specified by maintaining the bitmap image common to the current and the next frame's boundary box and adding the image of the new boundary box not included in the current boundary box to the stored bitmap image.

REFERENCES:
patent: 5276437 (1994-01-01), Horvath et al.
patent: 5363483 (1994-11-01), Jones et al.
patent: 5555368 (1996-09-01), Orton et al.
patent: 5657462 (1997-08-01), Brouwer et al.
patent: 5877762 (1999-03-01), Young
patent: 5920325 (1999-07-01), Morgan et al.

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