TEXTURE BASED METHOD AND SYSTEM FOR THE ANTI-ALIASING OF LINES AND CHARACTERS

摘要

A method for generating anti-aliased lines and characters is disclosed. The method comprises generating a texture map (402) based on a distribution (302) and applying the texture map to a polygonal region (502). In one aspect of this embodiment, the step of generating a texture map based on a distribution further comprises generating a texture map (402) comprising a series of concentric half circles (406). In the texture map, the concentric half circles represent a decreasing intensity as the radius of the concentric half circle increases. Additionally, in one embodiment, the texture map is generated using a Gaussian distribution (302). In another aspect of this embodiment, for each texel in a texture map defining a character (801), the smallest distance between a texel and each line segment that forms a character (801) is calculated. The smallest distance is used to determine an intensity value (I1) using the distribution (302). Then, the texel is associated with the intensity value (I1) to form a texture map (1002) for the character (801). Optionally, a halo value (alpha1) for each texel value can be determined by using the smallest distance found in conjunction with a second distribution to determine a halo value (alpha1) for each texel. This method can be repeated for each character (801) to be displayed.