Behdad Esfahbod
10 years ago
commit
0a5ae93362
4 changed files with 443 additions and 28 deletions
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/*
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* Copyright © 2014 Google, Inc. |
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* |
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* This is part of HarfBuzz, a text shaping library. |
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* |
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* Permission is hereby granted, without written agreement and without |
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* license or royalty fees, to use, copy, modify, and distribute this |
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* software and its documentation for any purpose, provided that the |
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* above copyright notice and the following two paragraphs appear in |
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* all copies of this software. |
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* |
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR |
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES |
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN |
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH |
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* DAMAGE. |
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* |
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, |
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS |
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO |
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
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* |
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* Google Author(s): Behdad Esfahbod |
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*/ |
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#ifndef HB_OT_SHAPE_COMPLEX_ARABIC_WIN1256_HH |
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/*
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* The macros in the first part of this file are generic macros that can |
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* be used to define the bytes for OpenType table data in code in a |
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* readable manner. We can move the macros to reside with their respective |
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* struct types, but since we only use these to define one data table, the |
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* Windows-1256 Arabic shaping table in this file, we keep them here. |
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*/ |
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/* First we measure, then we cut. */ |
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#ifndef OT_MEASURE |
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#define OT_MEASURE |
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#define OT_TABLE_START static const struct TABLE_NAME { |
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#define OT_TABLE_END } |
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#define OT_LABEL_START(Name) unsigned char Name[ |
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#define OT_LABEL_END ]; |
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#define OT_BYTE(u8) +1/*byte*/ |
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#define OT_USHORT(u16) +2/*bytes*/ |
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#else |
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#undef OT_MEASURE |
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#define OT_TABLE_START TABLE_NAME = { |
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#define OT_TABLE_END }; |
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#define OT_LABEL_START(Name) { |
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#define OT_LABEL_END }, |
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#define OT_BYTE(u8) (u8), |
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#define OT_USHORT(u16) (unsigned char)((u16)>>8), (unsigned char)((u16)&0xFFu), |
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#define OT_COUNT(Name, ItemSize) ((unsigned int) sizeof(((struct TABLE_NAME*)0)->Name) \ |
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/ (unsigned int)(ItemSize) \
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/* OT_ASSERT it's divisible (and positive). */) |
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#define OT_DISTANCE(From,To) ((unsigned int) \ |
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((char*)(&((struct TABLE_NAME*)0)->To) - \
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(char*)(&((struct TABLE_NAME*)0)->From)) \
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/* OT_ASSERT it's positive. */) |
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#endif |
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#define OT_LABEL(Name) \ |
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OT_LABEL_END \
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OT_LABEL_START(Name) |
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/* Whenever we receive an argument that is a list, it will expand to
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* contain commas. That cannot be passed to another macro because the |
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* commas will throw off the preprocessor. The solution is to wrap |
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* the passed-in argument in OT_LIST() before passing to the next macro. |
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* Unfortunately this trick requires vararg macros. */ |
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#define OT_LIST(...) __VA_ARGS__ |
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/*
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* Basic Types |
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*/ |
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#define OT_TAG(a,b,c,d) \ |
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OT_BYTE(a) OT_BYTE(b) OT_BYTE(c) OT_BYTE(d) |
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#define OT_OFFSET(From, To) /* Offset from From to To in bytes */ \ |
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OT_USHORT(OT_DISTANCE(From, To)) |
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#define OT_GLYPHID /* GlyphID */ \ |
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OT_USHORT |
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#define OT_UARRAY(Name, Items) \ |
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OT_LABEL_START(Name) \
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OT_USHORT(OT_COUNT(Name##Data, 2)) \
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OT_LABEL(Name##Data) \
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Items \
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OT_LABEL_END |
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#define OT_UHEADLESSARRAY(Name, Items) \ |
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OT_LABEL_START(Name) \
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OT_USHORT(OT_COUNT(Name##Data, 2) + 1) \
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OT_LABEL(Name##Data) \
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Items \
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OT_LABEL_END |
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/*
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* Common Types |
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*/ |
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#define OT_LOOKUP_FLAG_IGNORE_MARKS 0x08u |
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#define OT_LOOKUP(Name, LookupType, LookupFlag, SubLookupOffsets) \ |
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OT_LABEL_START(Name) \
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OT_USHORT(LookupType) \
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OT_USHORT(LookupFlag) \
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OT_LABEL_END \
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OT_UARRAY(Name##SubLookupOffsetsArray, OT_LIST(SubLookupOffsets)) |
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#define OT_SUBLOOKUP(Name, SubFormat, Items) \ |
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OT_LABEL_START(Name) \
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OT_USHORT(SubFormat) \
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Items |
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#define OT_COVERAGE1(Name, Items) \ |
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OT_LABEL_START(Name) \
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OT_USHORT(1) \
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OT_LABEL_END \
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OT_UARRAY(Name##Glyphs, OT_LIST(Items)) |
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/*
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* GSUB |
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*/ |
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#define OT_LOOKUP_TYPE_SUBST_SINGLE 1u |
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#define OT_LOOKUP_TYPE_SUBST_MULTIPLE 2u |
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#define OT_LOOKUP_TYPE_SUBST_LIGATURE 4u |
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#define OT_SUBLOOKUP_SINGLE_SUBST_FORMAT2(Name, FromGlyphs, ToGlyphs) \ |
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OT_SUBLOOKUP(Name, 2, \
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OT_OFFSET(Name, Name##Coverage) \
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OT_LABEL_END \
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OT_UARRAY(Name##Substitute, OT_LIST(ToGlyphs)) \
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) \
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OT_COVERAGE1(Name##Coverage, OT_LIST(FromGlyphs)) \
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/* ASSERT_STATIC_EXPR len(FromGlyphs) == len(ToGlyphs) */ |
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#define OT_SUBLOOKUP_LIGATURE_SUBST_FORMAT1(Name, FirstGlyphs, LigatureSetOffsets) \ |
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OT_SUBLOOKUP(Name, 1, \
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OT_OFFSET(Name, Name##Coverage) \
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OT_LABEL_END \
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OT_UARRAY(Name##LigatureSetOffsetsArray, OT_LIST(LigatureSetOffsets)) \
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) \
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OT_COVERAGE1(Name##Coverage, OT_LIST(FirstGlyphs)) \
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/* ASSERT_STATIC_EXPR len(FirstGlyphs) == len(LigatureSetOffsets) */ |
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#define OT_LIGATURE_SET(Name, LigatureSetOffsets) \ |
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OT_UARRAY(Name, OT_LIST(LigatureSetOffsets)) |
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#define OT_LIGATURE(Name, Components, LigGlyph) \ |
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OT_LABEL_START(Name) \
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LigGlyph \
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OT_LABEL_END \
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OT_UHEADLESSARRAY(Name##ComponentsArray, OT_LIST(Components)) |
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/*
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* |
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* Start of Windows-1256 shaping table. |
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* |
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*/ |
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/* Table name. */ |
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#define TABLE_NAME arabic_win1256_gsub_lookups |
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/* Table manifest. */ |
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#define MANIFEST(Items) \ |
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OT_LABEL_START(manifest) \
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OT_USHORT(OT_COUNT(manifestData, 6)) \
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OT_LABEL(manifestData) \
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Items \
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OT_LABEL_END |
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#define MANIFEST_LOOKUP(Tag, Name) \ |
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Tag \
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OT_OFFSET(manifest, Name) |
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/* Shorthand. */ |
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#define G OT_GLYPHID |
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/*
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* Table Start |
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*/ |
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OT_TABLE_START |
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/*
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* Manifest |
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*/ |
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MANIFEST( |
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MANIFEST_LOOKUP(OT_TAG('r','l','i','g'), rligLookup) |
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MANIFEST_LOOKUP(OT_TAG('i','n','i','t'), initLookup) |
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MANIFEST_LOOKUP(OT_TAG('m','e','d','i'), mediLookup) |
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MANIFEST_LOOKUP(OT_TAG('f','i','n','a'), finaLookup) |
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MANIFEST_LOOKUP(OT_TAG('r','l','i','g'), rligMarksLookup) |
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) |
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/*
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* Lookups |
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*/ |
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OT_LOOKUP(initLookup, OT_LOOKUP_TYPE_SUBST_SINGLE, OT_LOOKUP_FLAG_IGNORE_MARKS, |
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OT_OFFSET(initLookup, initmediSubLookup) |
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OT_OFFSET(initLookup, initSubLookup) |
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) |
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OT_LOOKUP(mediLookup, OT_LOOKUP_TYPE_SUBST_SINGLE, OT_LOOKUP_FLAG_IGNORE_MARKS, |
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OT_OFFSET(mediLookup, initmediSubLookup) |
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OT_OFFSET(mediLookup, mediSubLookup) |
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OT_OFFSET(mediLookup, medifinaLamAlefSubLookup) |
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) |
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OT_LOOKUP(finaLookup, OT_LOOKUP_TYPE_SUBST_SINGLE, OT_LOOKUP_FLAG_IGNORE_MARKS, |
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OT_OFFSET(finaLookup, finaSubLookup) |
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/* We don't need this one currently as the sequence inherits masks
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* from the first item. Just in case we change that in the future |
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* to be smart about Arabic masks when ligating... */ |
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OT_OFFSET(finaLookup, medifinaLamAlefSubLookup) |
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) |
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OT_LOOKUP(rligLookup, OT_LOOKUP_TYPE_SUBST_LIGATURE, OT_LOOKUP_FLAG_IGNORE_MARKS, |
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OT_OFFSET(rligLookup, lamAlefLigaturesSubLookup) |
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) |
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OT_LOOKUP(rligMarksLookup, OT_LOOKUP_TYPE_SUBST_LIGATURE, 0, |
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OT_OFFSET(rligMarksLookup, shaddaLigaturesSubLookup) |
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) |
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/*
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* init/medi/fina forms |
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*/ |
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OT_SUBLOOKUP_SINGLE_SUBST_FORMAT2(initmediSubLookup, |
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G(198) G(200) G(201) G(202) G(203) G(204) G(205) G(206) G(211) |
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G(212) G(213) G(214) G(223) G(225) G(227) G(228) G(236) G(237), |
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G(162) G(4) G(5) G(5) G(6) G(7) G(9) G(11) G(13) |
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G(14) G(15) G(26) G(140) G(141) G(142) G(143) G(154) G(154) |
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) |
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OT_SUBLOOKUP_SINGLE_SUBST_FORMAT2(initSubLookup, |
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G(218) G(219) G(221) G(222) G(229), |
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G(27) G(30) G(128) G(131) G(144) |
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) |
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OT_SUBLOOKUP_SINGLE_SUBST_FORMAT2(mediSubLookup, |
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G(218) G(219) G(221) G(222) G(229), |
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G(28) G(31) G(129) G(138) G(149) |
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) |
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OT_SUBLOOKUP_SINGLE_SUBST_FORMAT2(finaSubLookup, |
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G(194) G(195) G(197) G(198) G(199) G(201) G(204) G(205) G(206) |
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G(218) G(219) G(229) G(236) G(237), |
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G(2) G(1) G(3) G(181) G(0) G(159) G(8) G(10) G(12) |
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G(29) G(127) G(152) G(160) G(156) |
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) |
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OT_SUBLOOKUP_SINGLE_SUBST_FORMAT2(medifinaLamAlefSubLookup, |
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G(165) G(178) G(180) G(252), |
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G(170) G(179) G(185) G(255) |
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) |
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/*
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* Lam+Alef ligatures |
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*/ |
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OT_SUBLOOKUP_LIGATURE_SUBST_FORMAT1(lamAlefLigaturesSubLookup, |
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G(225), |
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OT_OFFSET(lamAlefLigaturesSubLookup, lamLigatureSet) |
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) |
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OT_LIGATURE_SET(lamLigatureSet, |
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OT_OFFSET(lamLigatureSet, lamInitLigature1) |
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OT_OFFSET(lamLigatureSet, lamInitLigature2) |
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OT_OFFSET(lamLigatureSet, lamInitLigature3) |
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OT_OFFSET(lamLigatureSet, lamInitLigature4) |
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) |
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OT_LIGATURE(lamInitLigature1, G(199), G(165)) |
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OT_LIGATURE(lamInitLigature2, G(195), G(178)) |
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OT_LIGATURE(lamInitLigature3, G(194), G(180)) |
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OT_LIGATURE(lamInitLigature4, G(197), G(252)) |
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/*
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* Shadda ligatures |
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*/ |
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OT_SUBLOOKUP_LIGATURE_SUBST_FORMAT1(shaddaLigaturesSubLookup, |
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G(248), |
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OT_OFFSET(shaddaLigaturesSubLookup, shaddaLigatureSet) |
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) |
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OT_LIGATURE_SET(shaddaLigatureSet, |
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OT_OFFSET(shaddaLigatureSet, shaddaLigature1) |
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OT_OFFSET(shaddaLigatureSet, shaddaLigature2) |
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OT_OFFSET(shaddaLigatureSet, shaddaLigature3) |
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) |
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OT_LIGATURE(shaddaLigature1, G(243), G(172)) |
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OT_LIGATURE(shaddaLigature2, G(245), G(173)) |
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OT_LIGATURE(shaddaLigature3, G(246), G(175)) |
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/*
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* Table end |
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*/ |
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OT_TABLE_END |
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/*
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* Clean up |
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*/ |
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#undef OT_TABLE_START |
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#undef OT_TABLE_END |
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#undef OT_LABEL_START |
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#undef OT_LABEL_END |
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#undef OT_BYTE |
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#undef OT_USHORT |
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#undef OT_DISTANCE |
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#undef OT_COUNT |
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/*
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* Include a second time to get the table data... |
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*/ |
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#ifdef OT_MEASURE |
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#include __FILE__ |
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#endif |
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#define HB_OT_SHAPE_COMPLEX_ARABIC_WIN1256_HH |
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#endif /* HB_OT_SHAPE_COMPLEX_ARABIC_WIN1256_HH */ |
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