Apple Inc.

William J Dobbie

Moinul H Khan

Arthur Yasheng Zhang

Tobias Eble

Yohan Rajan

Siddharth Shankar Hazra

Yanli Zhang

Various implementations disclosed herein include devices, systems, and methods that use an analytic approach to determine signed distance field (SDF) representations that represent one or more curves (e.g., glyphs that represent text) and cache the SDF representations for reuse in rendering the curves in similar rendering conditions. For example, the SDF representation may be re-used, based on determining that text is going to occupy a similar-sized portion of the device's display in multiple views. An SDF representation is recalculated if different conditions (e.g., substantial zooming in on the text) occur in different views.

Rendering using analytic signed distance fields

Various implementations disclosed herein include devices, systems, and methods that dynamically-size zones used in foveated rendering of content that includes text. In some implementations, this involves adjusting the size of a first zone, e.g., a foveated gaze zone (FGZ), based on the apparent size of text from a viewpoint. For example, a FGZ may be increased or decreased in width, height, diameter, or other size attribute based on determining an angle subtended by one or more individual glyphs of the text from the viewpoint. Various implementations disclosed herein include devices, systems, and methods that select a text-rendering algorithm based on a relationship between (a) the rendering resolution of a portion of an image corresponding to a part of a glyph and (b) the size that the part of the glyph will occupy in the image.

Rendering computer-generated reality text

Growing community of inventors

Sunnyvale, CA, United States of America

William J Dobbie