Christopher T Lester

US Patent:

20140132614, May 15, 2014

Filed:

Nov 14, 2012

Appl. No.:

13/677125

Inventors:

- Redmond WA, US
Subha Bhattacharyay - Medina WA, US
Gerard Zytnicki - Seattle WA, US
Jeffrey Alan Herold - Kirkland WA, US
Christopher Shannon Lester - Redmond WA, US
John Adam Szofran - Seattle WA, US
Fan Zhang - Redmond WA, US
Kaushik Barat - Redmond WA, US

Assignee:

MICROSOFT CORPORATION - Redmond WA

International Classification:

G06T 1/60

US Classification:

345531

Abstract:

The subject disclosure is directed towards saving undo state information for a digital art program. Changed state data is computed (e.g., via GPU-side logic) based upon the state information of the current state of a canvas and the previous state information, e.g., via an XOR operation or parallel XOR operations. The changed state data is compressed into compressed state data, e.g., via run-length encoding, and the compressed state data is stored, e.g., in a circular buffer in GPU memory. For an undo command, the compressed data is decompressed into the changed state data, and the bitwise operation reversed.

US Patent:

20140132619, May 15, 2014

Filed:

Nov 14, 2012

Appl. No.:

13/677009

Inventors:

- Redmond WA, US
Subha Bhattacharyay - Medina WA, US
Gerard Zytnicki - Seattle WA, US
Jeffrey A. Herold - Kirland WA, US
Christopher S. Lester - Redmond WA, US
John A. Szofran - Seattle WA, US
Fan Zhang - Redmond WA, US
Kaushik Barat - Redmond WA, US

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

G09G 5/02

US Classification:

345589, 345581

Abstract:

A graphics system is described for simulating the interaction of two or more types of media on a simulated canvas. The graphics system performs this task by consulting a media adhesion matrix which determines a type of behavior that is produced when an attempt is made to add a new medium over the top of an existing medium. In one scenario, the new medium is a watercolor medium which does not apply over a hydrophobic media (such as an oil medium), but may tunnel under such hydrophobic medium in a flow layer during a simulation operation. Various provisions are also disclosed herein to improve the efficiency of the simulation operation.