Methods and systems for selecting different anti-aliasing filters to be applied
to objects of image data rendered with pixel sub-component precision based on the
attributes of the objects of the graphics image. For example, when rendering a
character traditional anti-aliasing applied in the direction parallel to the striping
of the pixel sub-components is adapted to the unique requirements of different
character font sizes such that a large amount of anti-aliasing is applied to large
font sizes while a small amount of anti-aliasing is provided for characters at
small font sizes. Displaced sampling is utilized to determine the alpha values
for a plurality of vertical samples for each RGB pixel sub-component. The selected
anti-aliasing filter is applied to the alpha values to determine the luminous intensity
values of the RGB pixel sub-components.
