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2009-07-10[spans] Round rasterization grid pixel areas instead of truncating.M Joonas Pihlaja1-0/+0
When converting a grid pixel area into the range [0,255] the GRID_AREA_TO_ALPHA() macro would truncate extra bits off the result rather than rounding. This could cause seams between abutting collinear edges of separately rendered polygons even when the coordinates of the abutting edges were the same. Reported by Soeren Sandmann on the cairo mailing list: http://lists.cairographics.org/archives/cairo/2009-May/017043.html
2008-12-07[cairo-spans] Render clip mask surfaces with spans if we can.M Joonas Pihlaja1-0/+0
Generating surface masks for clipping can also benefit from span rendering sometimes.