Switching between direct rendering and binning in graphics processing using an overdraw tracker

摘要

This disclosure presents techniques and structures for determining a rendering mode (e.g., a binning rendering mode and a direct rendering mode) as well as techniques and structures for switching between such rendering modes. Rendering mode may be determined by analyzing rendering characteristics. Rendering mode may also be determined by tracking overdraw in a bin. The rendering mode may be switched from a binning rendering mode to a direct rendering mode by patching commands that use graphics memory addresses to use system memory addresses. Patching may be handled by a CPU or by a second write command buffer executable by a GPU.

主权项

1. A method of graphics processing, the method comprising:
performing a binning operation on primitives of a scene; calculating an overdraw number representing an amount of overdraw of primitives in a region of the scene based on the binning operation, wherein calculating the overdraw number representing the amount of overdraw comprises:
calculating an overlap value for each pixel in a bin;summing each calculated overlap value for each pixel in the bin to produce a total overlap value; anddividing the total overlap value by a number of pixels in the bin to produce the overdraw number; and selecting one of a plurality of rendering modes based on the calculated overdraw number.