350 lines
9.4 KiB
C++
350 lines
9.4 KiB
C++
/*
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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_SHAPER_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_UINT8(u8) +1/*byte*/
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#define OT_UINT16(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_UINT8(u8) (u8),
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#define OT_UINT16(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_UINT8(a) OT_UINT8(b) OT_UINT8(c) OT_UINT8(d)
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#define OT_OFFSET(From, To) /* Offset from From to To in bytes */ \
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OT_UINT16(OT_DISTANCE(From, To))
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#define OT_GLYPHID /* GlyphID */ \
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OT_UINT16
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/* Shorthand. */
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#define G OT_GLYPHID
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#define OT_UARRAY(Name, Items) \
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OT_LABEL_START(Name) \
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OT_UINT16(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_UINT16(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_UINT16(LookupType) \
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OT_UINT16(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_UINT16(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_UINT16(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_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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/* static_assert_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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/* static_assert_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_UINT16(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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/*
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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 MANIFEST
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#undef MANIFEST_LOOKUP
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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_UINT8
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#undef OT_UINT16
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#undef OT_COUNT
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#undef OT_DISTANCE
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#undef OT_LABEL
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#undef OT_LIST
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#undef OT_TAG
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#undef OT_OFFSET
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#undef OT_GLYPHID
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#undef G
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#undef OT_UARRAY
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#undef OT_UHEADLESSARRAY
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#undef OT_LOOKUP_FLAG_IGNORE_MARKS
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#undef OT_LOOKUP
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#undef OT_SUBLOOKUP
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#undef OT_COVERAGE1
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#undef OT_LOOKUP_TYPE_SUBST_SINGLE
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#undef OT_LOOKUP_TYPE_SUBST_LIGATURE
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#undef OT_SUBLOOKUP_SINGLE_SUBST_FORMAT2
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#undef OT_SUBLOOKUP_LIGATURE_SUBST_FORMAT1
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#undef OT_LIGATURE_SET
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#undef OT_LIGATURE
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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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#if 0
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#include "hb.hh" /* Make check-includes.sh happy. */
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#endif
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#ifdef OT_MEASURE
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#include "hb-ot-shaper-arabic-win1256.hh"
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#endif
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#define HB_OT_SHAPER_ARABIC_WIN1256_HH
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#endif /* HB_OT_SHAPER_ARABIC_WIN1256_HH */
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