APPARATUS AND METHOD FOR CONTROLLING EARLY DEPTH PROCESSING AND POST DEPTH PROCESSING

摘要

A depth processing apparatus includes a depth buffer, an early depth processing circuit, a post depth processing circuit, and a depth processing controller. The depth buffer stores depth information of a plurality of pixels of a screen space. The early depth processing circuit performs early depth processing based on at least a portion of the depth information before a pixel shading stage. The post depth processing circuit performs post depth processing based on at least a portion of the depth information after the pixel shading stage. The depth processing controller manages a plurality of dependency indication values corresponding to a plurality of sub-regions in the screen space, respectively, and configured to control a first pixel for undergoing at least one of the early depth processing and the post depth processing by referring a first dependency indication value of a first sub-region in which the first pixel is located.

主权项

1. A depth processing apparatus, comprising:
a depth buffer, configured to store depth information of a plurality of pixels of a screen space; an early depth processing circuit, configured to perform early depth processing based on at least a portion of the depth information in the depth buffer before a pixel shading stage; a post depth processing circuit, configured to perform post depth processing based on at least a portion of the depth information in the depth buffer after the pixel shading stage; and a depth processing controller, configured to manage a plurality of dependency indication values corresponding to a plurality of sub-regions in the screen space, respectively, and configured to control a first pixel for undergoing at least one of the early depth processing and the post depth processing by referring a first dependency indication value of a first sub-region in which the first pixel is located, wherein each of the dependency indication values is configured to maintain data coherency between the early depth processing and the post depth processing of a corresponding sub-region in the screen space.