초록 ▼

A method for improved multi-pass rendering in a graphics system includes rendering geometry in a scene to generate rendered image data and then feeding back this rendered image data for a subsequent rendering pass for the same or other geometry in a scene. Geometric primitives are rasterized to gene

A method for improved multi-pass rendering in a graphics system includes rendering geometry in a scene to generate rendered image data and then feeding back this rendered image data for a subsequent rendering pass for the same or other geometry in a scene. Geometric primitives are rasterized to generate pixel data, which is stored in a rasterization buffer. The pixel data, including lists of fragment records, is resolved and stored in a shared memory. Resolved pixel data can be combined to generate a display image at real-time, interactive rates. The resolved pixel data can also be used as a texture for subsequent rendering operations. Geometry in a scene can be rasterized in more than one pass to generate pixel data including fragments for partially covered pixels. Fragments from subsequent passes can be blended with corresponding fragments stored in the rasterization buffer from a previous pass.

대표청구항 ▼

[ We claim:] [1.] In a graphics processing system, a method for rendering geometric primitives in a view volume to compute a display image for a view space at a computational rate greater than 10 Hz, the method comprising:rendering a first set of geometric primitives in a first pass including raster

[ We claim:] [1.] In a graphics processing system, a method for rendering geometric primitives in a view volume to compute a display image for a view space at a computational rate greater than 10 Hz, the method comprising:rendering a first set of geometric primitives in a first pass including rasterizing the first set of geometric primitives to generate pixel data, storing the pixel data in a rasterization buffer, including sub-pixel anti-aliasing data, resolving the pixel data, including the sub-pixel anti-aliasing data, in the rasterization buffer to compute anti-aliased pixel data, and transferring the anti-aliased pixel data to a memory device, wherein the first set of geometric primitives represents a first object, the first object is rendered to a first anti-aliased image layer such that the first anti-aliased image layer is independently accessible as a texture map for use in texture mapping operations in other rendering passes within a computational period of the display image, the first object is rendered to sub-divided 2D regions of the view space, and each of the anti-aliased images corresponding to the 2D regions are independently accessible for texture mapping operations;performing a subsequent rendering pass including rasterizing the first set of geometric primitives using the anti-aliased pixel data as a texture to produce rendered image data;generating the display image from the rendered image data at the computational rate; andrepeating the above steps to produce subsequent display images at the computational rate.