Patent ID: 6509897
Filing Date: 2003-01-21
Classification: G06T

Abstract:
A system for providing antialiasing of a graphical image from data describing at least one object including a plurality of fragments, each fragment including a coverage mask, a depth value, and a slope of the depth value, the system comprising:a display including a plurality of pixels; means coupled to the display for providing a plurality of fragments for the at least one object, the plurality of fragments intersecting the plurality of pixels, each of the plurality of fragments including a depth value, a slope of the depth value, and an indication of a portion of a corresponding pixel that is intersected; an antialiasing unit, coupled with the display, for providing antialiasing of each of the plurality of fragments based on the depth value, the slope of the depth value, and the indication of the extent a corresponding pixel is intersected; wherein the antialiasing unit further calculates a plurality of subpixel depth values for the plurality of fragments and determines whether to store a portion of each of the plurality of fragments based on the plurality of subpixel depth values and the indication of the extent a corresponding pixel is intersected.