Programmable blending in multi-threaded processing units

摘要

A technique for efficiently rendering content reduces each complex blend mode to a series of basic blend operations. The series of basic blend operations are executed within a recirculating pipeline until a final blended value is computed. The recirculating pipeline is positioned within a color raster operations unit of a graphics processing unit for efficient access to image buffer data.

主权项

1. A computer-implemented method for performing a programmable blend operation, the method comprising:
receiving source pixel data and destination pixel data for processing; mapping the source pixel data and the destination pixel data to a uniform arithmetic format; determining, via a processor, whether a first blend operation is required based on whether an early-out condition exists; and if the early-out condition does not exist, and a first blend operation is required, then performing the first blend operation based on the mapped source pixel data and mapped destination pixel data to generate a first blend result, or if the early-out condition exists, and a first blend operation is not required, then performing a by-pass operation and storing the mapped source pixel data or mapped destination pixel data to a render target.