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1. (WO2018182989) SINGLE PASS FLEXIBLE SCREEN/SCALE RASTERIZATION

Pub. No.:    WO/2018/182989    International Application No.:    PCT/US2018/022693
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Fri Mar 16 00:59:59 CET 2018
IPC: G06T 5/00
G06T 15/00
G02B 27/01
Applicants: ADVANCED MICRO DEVICES, INC.
ATI TECHNOLOGIES ULC
Inventors: MANTOR, Michael
LEFEBVRE, Laurent
TUOMI, Mika
KALLIO, Kiia
Title: SINGLE PASS FLEXIBLE SCREEN/SCALE RASTERIZATION
Abstract:
An apparatus, such as a head mounted device (HMD)(300, 125), includes one or more processors (335) configured to implement a graphics pipeline (100) that renders pixels in window space (405, 510) with a nonuniform pixel spacing. The apparatus also includes a first distortion function (109, 525) that maps the non-uniformly spaced pixels in window space to uniformly spaced pixels in raster space (410, 520). The apparatus further includes a scan converter (110, 1225) configured to sample the pixels in window space through the first distortion function. The scan converter is configured to render display pixels used to generate an image for display to a user based on the uniformly spaced pixels in raster space. In some cases, the pixels in the window space are rendered such that a pixel density per subtended area is constant across the user's field of view.