Text rendering with improved command stream operations

Details Text rendering with improved command stream operations Text rendering with improved command stream operations

2005-04-25

2009-11-24

Johnson, M Good (Department: 2628)

Computer graphics processing and selective visual display system

Computer graphics processing

Character generating

C345S469000

Reexamination Certificate

active

07623130

ABSTRACT:
A system, method, and computer program for high-speed, efficient text rendering are disclosed. In accordance with certain embodiments of the present invention, an image resource architecture is provided for optimal sub-image uploads to keep the glyph cache up to date. A glyph cache is divided into zones, or sub-caches, wherein requests for writing a glyph bitmap to the cache may be handled by destroying or clearing an entire zone. In accordance with other embodiments of the present invention, a highly efficient method of rendering is provided wherein commands are automatically combined and made into larger commands for the GPU. Alternatively, rather than performing a command stream flush upon each intersection, a texture cache flush may be implemented. All source glyph bitmaps may be placed into one texture.

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