Wrote the common code (for DirectWrite and Pango) to deal with OpenType features. Now to merge with Core Text's internal AAT-to-OpenType mapping.
This commit is contained in:
Pietro Gagliardi
parent
e4b761d611
commit
2ffcd192c0
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@ -0,0 +1,227 @@
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// 14 february 2017
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#include "../ui.h"
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#include "uipriv.h"
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// note: each tag should only appear in quotes once; this allows automated tools to determine what we cover and don't cover
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typedef void (*specToOpenTypeEnumFunc)(const char *featureTag, uint32_t param, void *data);
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static void boolspec(uiAttributeSpec *spec, const char *featureTag, specToOpenTypeEnumFunc f, void *data)
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{
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if (spec->Value != 0) {
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(*f)(featureTag, 1, data);
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return;
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}
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(*f)(featureTag, 0, data);
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}
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void specToOpenType(uiAttributeSpec *spec, specToOpenTypeEnumFunc f, void *data)
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{
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switch (spec->Type) {
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case uiAttributeStandardLigatures:
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boolspec(spec, "liga", f, data);
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return;
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case uiAttributeRequiredLigatures:
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boolspec(spec, "rlig", f, data);
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return;
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case uiAttributeDiscretionaryLigatures:
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boolspec(spec, "dlig", f, data);
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return;
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case uiAttributeContextualLigatures:
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boolspec(spec, "clig", f, data);
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return;
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case uiAttributeHistoricalLigatures:
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boolspec(spec, "hlig", f, data);
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return;
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case uiAttributeUnicase:
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boolspec(spec, "unic", f, data);
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return;
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// TODO is this correct or should we explicitly switch the rest off too?
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case uiAttributeSuperscripts:
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switch (spec->Value) {
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case uiAttributeSuperscriptSuperscript:
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(*f)("sups", 1, data);
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break;
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case uiAttributeSuperscriptSubscript:
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(*f)("subs", 1, data);
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break;
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case uiAttributeSuperscriptOrdinal:
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(*f)("ordn", 1, data);
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break;
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case uiAttributeSuperscriptScientificInferior:
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(*f)("sinf", 1, data);
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break;
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}
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return;
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// TODO is this correct or should we explicitly switch the rest off too?
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case uiAttributeFractionForms:
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switch (spec->Value) {
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case uiAttributeFractionFormVertical:
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(*f)("afrc", 1, data);
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break;
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case uiAttributeFractionFormDiagonal:
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(*f)("frac", 1, data);
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break;
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}
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return;
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case uiAttributeSlashedZero:
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boolspec(spec, "zero", data);
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return;
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case uiAttributeMathematicalGreek:
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boolspec(spec, "mgrk", data);
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return;
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case uiAttributeOrnamentalForms:
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(*f)("ornm", (uint32_t) (spec->Value), data);
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return;
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case uiAttributeTitlingCapitalForms:
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boolspec(spec, "titl", data);
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return;
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// TODO is this correct or should we explicitly switch the rest off too?
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case uiAttributeHanCharacterForms:
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switch (spec->Value) {
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case uiAttributeHanCharacterFormTraditional:
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(*f)("trad", 1, data);
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break;
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case uiAttributeHanCharacterFormSimplified:
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(*f)("smpl", 1, data);
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break;
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case uiAttributeHanCharacterFormJIS1978:
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(*f)("jp78", 1, data);
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break;
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case uiAttributeHanCharacterFormJIS1983:
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(*f)("jp83", 1, data);
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break;
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case uiAttributeHanCharacterFormJIS1990:
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(*f)("jp90", 1, data);
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break;
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case uiAttributeHanCharacterFormExpert:
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(*f)("expt", 1, data);
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break;
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case uiAttributeHanCharacterFormJIS2004:
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(*f)("jp04", 1, data);
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break;
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case uiAttributeHanCharacterFormHojo:
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(*f)("hojo", 1, data);
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break;
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case uiAttributeHanCharacterFormNLC:
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(*f)("nlck", 1, data);
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break;
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case uiAttributeHanCharacterFormTraditionalNames:
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(*f)("tnam", 1, data);
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break;
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}
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return;
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case uiAttributeLowercaseNumbers:
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boolspec(spec, "onum", data);
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return;
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case uiAttributeGlyphAnnotations:
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(*f)("nalt", (uint32_t) (spec->Value), data);
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return;
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case uiAttributeCJKRomanToitalics:
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boolspec(spec, "ital", data);
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return;
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case uiAttributeCaseSensitiveForms:
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boolspec(spec, "case", data);
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return;
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case uiAttributeCapitalSpacing:
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boolspec(spec, "cpsp", data);
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return;
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case uiAttributeAlternateHorizontalKana:
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boolspec(spec, "hkna", data);
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return;
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case uiAttributeAlternateVerticalKana:
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boolspec(spec, "vkna", data);
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return;
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case uiAttributeStylisticAlternative1:
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boolspec(spec, "ss01", data);
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return;
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case uiAttributeStylisticAlternative2:
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boolspec(spec, "ss02", data);
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return;
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case uiAttributeStylisticAlternative3:
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boolspec(spec, "ss03", data);
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return;
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case uiAttributeStylisticAlternative4:
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boolspec(spec, "ss04", data);
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return;
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case uiAttributeStylisticAlternative5:
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boolspec(spec, "ss05", data);
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return;
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case uiAttributeStylisticAlternative6:
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boolspec(spec, "ss06", data);
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return;
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case uiAttributeStylisticAlternative7:
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boolspec(spec, "ss07", data);
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return;
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case uiAttributeStylisticAlternative8:
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boolspec(spec, "ss08", data);
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return;
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case uiAttributeStylisticAlternative9:
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boolspec(spec, "ss09", data);
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return;
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case uiAttributeStylisticAlternative10:
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boolspec(spec, "ss10", data);
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return;
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case uiAttributeStylisticAlternative11:
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boolspec(spec, "ss11", data);
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return;
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case uiAttributeStylisticAlternative12:
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boolspec(spec, "ss12", data);
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return;
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case uiAttributeStylisticAlternative13:
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boolspec(spec, "ss13", data);
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return;
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case uiAttributeStylisticAlternative14:
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boolspec(spec, "ss14", data);
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return;
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case uiAttributeStylisticAlternative15:
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boolspec(spec, "ss15", data);
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return;
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case uiAttributeStylisticAlternative16:
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boolspec(spec, "ss16", data);
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return;
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case uiAttributeStylisticAlternative17:
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boolspec(spec, "ss17", data);
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return;
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case uiAttributeStylisticAlternative18:
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boolspec(spec, "ss18", data);
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return;
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case uiAttributeStylisticAlternative19:
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boolspec(spec, "ss19", data);
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return;
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case uiAttributeStylisticAlternative20:
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boolspec(spec, "ss20", data);
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return;
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case uiAttributeContextualAlternates:
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boolspec(spec, "calt", data);
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return;
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case uiAttributeSwashes:
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boolspec(spec, "swsh", data);
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return;
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case uiAttributeContextualSwashes:
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boolspec(spec, "cswh", data);
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return;
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// TODO is this correct or should we explicitly switch the rest off too?
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case uiAttributeLowercaseCapForms:
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switch (spec->Value) {
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case uiAttributeCapFormSmallCaps:
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(*f)("smcp", 1, data);
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break;
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case uiAttributeCapFormPetiteCaps:
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(*f)("pcap", 1, data);
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break;
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}
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return;
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// TODO is this correct or should we explicitly switch the rest off too?
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case uiAttributeUppercaseCapForms:
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switch (spec->Value) {
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case uiAttributeCapFormSmallCaps:
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(*f)("c2sc", 1, data);
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break;
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case uiAttributeCapFormPetiteCaps:
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(*f)("c2pc", 1, data);
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break;
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}
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return;
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}
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}
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@ -62,7 +62,8 @@ _UI_ENUM(uiAttribute) {
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// TODO kAllTypographicFeaturesType
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uiAttributeCommonLigatures, // 0 = off, 1 = on
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// AAT calls these "common ligatures"
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uiAttributeStandardLigatures, // 0 = off, 1 = on
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uiAttributeRequiredLigatures, // 0 = off, 1 = on
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// AAT calls these "rare ligatures"
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uiAttributeDiscretionaryLigatures, // 0 = off, 1 = on
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@ -132,6 +133,7 @@ _UI_ENUM(uiAttribute) {
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// 8 = diamond
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// 9 = inverted box
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// 10 = inverted rounded box
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// TODO rename to AnnotatedForms?
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uiAttributeGlyphAnnotations, // an integer from 0 to a font-specified upper bound
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// TODO provide a function to get the upper bound?
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@ -148,13 +150,15 @@ _UI_ENUM(uiAttribute) {
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uiAttributeCJKRomansToItalics, // 0 = off, 1 = on
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uiAttributeCaseSensitiveLayout, // 0 = off, 1 = on
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// AAT calls this "case-sensitive layout"
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uiAttributeCaseSensitiveForms, // 0 = off, 1 = on
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// AAT: this is called "case-sensitive spacing"
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uiAttributeCapitalSpacing, // 0 = off, 1 = on
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uiAttributeAlternateHorizontalKana, // 0 = off, 1 = on
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uiAttributeAlternateVerticalKana, // 0 = off, 1 = on
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// TODO "Alternate"? unify all this
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uiAttributeStylisticAlternative1, // 0 = off, 1 = on
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uiAttributeStylisticAlternative2, // 0 = off, 1 = on
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uiAttributeStylisticAlternative3, // 0 = off, 1 = on
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