OpenType is a cross-platform font format developed by Adobe and Microsoft that accommodates large character sets and glyphs, often including fractions, discretionary ligatures, old-style numerals, and more.
Ligatures This brings up a dialog showing the names of all ligatures and of the glyphs that compose them if invoked from the outline glyph view, a list of all ligatures containing that glyph.
So if you select"i", you might see that"fi" depended on it as a ligature, and if you select"A. swash" you might see that"A" depended on it as a'swsh' alternate subs.
Mark to ligature This sub-table is very similar to the previous one except that the base glyph is a ligature and may have several different points at which the same type of accent may be placed.
In an Apple font, the context is specified by a state machine-- a mini program which parses and transforms the glyph stream. Conditional features may involve substitutions, ligatures or kerning and some more obscure behaviors.
When you create your anchor point you may say that it is to be in a ligature, in which case you will also be asked for a ligature index- a number running from 0 to the number of components in the ligature -1.
My assumption is that ligatures(like the"fi" ligature) usually need a bit of work on the user's part to get them to look good, in the case of"fi" the dot on the"i" needs to be fused into the hook of the"f", and if you are careless with the command you might destroy your work inadvertently.
Lcar'(合字キャレット)テーブル。
The'lcar'(ligature caret) table.
グリフ情報ウィンドウの[置換]/[合字]ダイアログ。
The glyph info substitutions/ligature dig.
FontForgeは合字キャレットをGDEFテーブルから読み込みます。
FontForge will read ligature carets out of a GDEF table.
必要に応じて合字、文字の並べ替え、グリフ置換を適用します。
Apply ligatures, character reordering and glyph substitution as needed.
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