Mixed reality system with multi-source virtual content compositing and method of generating virtual content using same
A computer implemented method for warping virtual content from two sources includes a first source generating first virtual content based on a first pose. The method also includes a second source generating second virtual content based on a second pose. The method further includes a compositor processing the first and second virtual content in a single pass. Processing the first and second virtual content includes generating warped first virtual content by warping the first virtual content based on a third pose, generating warped second virtual content by warping the second virtual content based on the third pose, and generating output content by compositing the warped first and second virtual content.
1. A computer implemented method for warping virtual content, comprising:
a compositor processing first and second virtual content in a single pass in a single pipeline,
wherein the first and second virtual content are based on respective first and second poses, and
wherein processing the first and second virtual content includes
the compositor selecting a first pixel of the first virtual content to correspond to an output pixel location,
the compositor warping the first pixel of the first virtual content based on a third pose of the display system to generate a first warped pixel,
the compositor selecting a second pixel of the second virtual content to correspond to the output pixel location,
the compositor warping the second pixel of the second virtual content based on the third pose of the display system to generate a second warped pixel, and
the compositor comparing a first depth of the first warped pixel and a second depth of the second warped pixel to identify a display pixel at the output pixel location.
2. The method of claim 1 , wherein the first virtual content comprises first image information at the first pixel.
3. The method of claim 2 , wherein the first image information comprises a first brightness.
4. The method of claim 2 , wherein the first image information comprises a first color.
5. The method of claim 2 , wherein the second virtual content comprises second image information at the second pixel.
6. The method of claim 5 , wherein the second image information comprises a second brightness.
7. The method of claim 5 , wherein the second image information comprises a second color.
8. The method of claim 1 , wherein comparing the first depth of the first warped pixel and the second depth of the second warped pixel comprises:
determining the first depth of the first warped pixel based on the third pose of the display system;
determining the second depth of the second warped pixel based on the third pose of the display system; and
comparing the first and second depths based on the third pose of the display system.
9. The method of claim 1 , wherein warping the first pixel of the first virtual content based on the third pose of the display system comprises applying a first transformation to the first pixel of the first virtual content to generate the first warped pixel.
10. The method of claim 1 , wherein warping the second pixel of the second virtual content based on the third pose of the display system comprises applying a second transformation to the second pixel of the second virtual content to generate the second warped pixel.
11. The method of claim 1 , further comprising the compositor receiving the first virtual content from a first application.
12. The method of claim 11 , further comprising the compositor receiving the second virtual content from a second application different from the first application.
13. The method of claim 1 , wherein the compositor comprises a raster operations unit.
14. The method of claim 1 , further comprising:
the compositor writing the display pixel to a memory;
the compositor sending the display pixel to a display unit; and
the display unit displaying an image to a user based on the display pixel.
15. The method of claim 14 , wherein the display unit is a projector.
16. The method of claim 1 , wherein the first virtual content is a pixel of a first virtual object.
17. The method of claim 1 , wherein the second virtual content is a pixel of a second virtual object.
18. A system for warping virtual content, comprising:
a warping unit to receive first and second virtual content generated based on first and second poses of a display device; and
a compositing unit operatively coupled to the warping unit,
wherein the system processes the first and second virtual content in a single pass in a single pipeline including
the warping unit selecting a first pixel of the first virtual content to correspond to an output pixel location,
the warping unit warping the first pixel of the first virtual content based on the third pose of the display device to generate a first warped pixel,
the warping unit selecting a second pixel of the second virtual content to correspond to the output pixel location,
the warping unit warping the second pixel of the second virtual content based on the third pose of the display device to generate a second warped pixel, and
the corn positing unit comparing a first depth of the first warped pixel and a second depth of the second warped pixel to identify a display pixel at the output pixel location.
19. The system of claim 18 , the warping unit further comprising a database,
wherein the system processing the first and second virtual content in the single pass in the single pipeline includes
the compositing unit writing the display pixel to the database,
the compositing unit sending the display pixel to a display device, and
the display device displaying an image to a user based on the display pixel.
20. A computer program product embodied in a non-transitory computer readable medium, the computer readable medium having stored thereon a sequence of instructions which, when executed by a processor causes the processor to execute a method for warping virtual content, the method comprising:
a compositor processing first and second virtual content in a single pass in a single pipeline,
wherein the first and second virtual content are based on respective first and second poses, and
wherein processing the first and second virtual content includes
the compositor selecting a first pixel of the first virtual content to correspond to an output pixel location,
the compositor warping the first pixel of the first virtual content based on a third pose of the display system to generate a first warped pixel,
the compositor selecting a second pixel of the second virtual content to correspond to the output pixel location,
the compositor warping the second pixel of the second virtual content based on the third pose of the display system to generate a second warped pixel, and
the compositor comparing a first depth of the first warped pixel and a second depth of the second warped pixel to identify a display pixel at the output pixel location.