![]() The instructions have to take into account the resolution of the output device (in pixels per em), whether it is grayscale or monochrome or RGB (which can have subpixel antialiasing). The rasterizer is “dumb” and must be told what to do with the outlines by the instructions. In TTF, there are actually instructions, not “hints”. ![]() You leave it to a “smart” rasterizer to preserve these features as best it can at various resolutions. You indicate stems, baselines, cap lines, x-height, and other features of your font that you consider important. In OTF (CFF PostScript), “hints” really are hints. ![]()
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