![]() In Arabic it might be preferred to combine the shadda with fatha (0x0651, 0x064E) into a ligature before processing shapes. These two glyphs can then be correctly placed using GPOS. ![]() To avoid multiple glyph variants to fit all base glyphs, the character is decomposed into two glyphs.a dot above and a dot below. In Syriac, the character 0x0732 is a combining mark that has a dot above AND a dot below the base character. The feature should be processed as the first feature processed, and should be processed only when it is called. This feature permits such composition/decompostion. Additionally, it may be preferable to compose two characters into a single glyph for better glyph processing. Function: To minimize the number of glyph alternates, it is sometimes desired to decompose a character into two glyphs.
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