[HB] Move OT file handling out of ot-layout
This commit is contained in:
Behdad Esfahbod
parent
0ead481a5a
commit
2098a021a8
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@ -13,13 +13,14 @@ HBSOURCES = \
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hb-font.c \
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hb-font-private.h \
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hb-private.h \
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hb-open-file-private.h \
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hb-open-types-private.h \
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hb-ot-layout.cc \
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hb-ot-layout-common-private.h \
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hb-ot-layout-gdef-private.h \
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hb-ot-layout-gpos-private.h \
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hb-ot-layout-gsubgpos-private.h \
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hb-ot-layout-gsub-private.h \
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hb-ot-layout-open-private.h \
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hb-ot-layout-private.h \
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hb-object-private.h \
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$(NULL)
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@ -0,0 +1,145 @@
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/*
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* Copyright (C) 2007,2008,2009 Red Hat, Inc.
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*
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* This is part of HarfBuzz, an OpenType Layout engine 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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* Red Hat Author(s): Behdad Esfahbod
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*/
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#ifndef HB_OPEN_FILE_PRIVATE_H
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#define HB_OPEN_FILE_PRIVATE_H
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#include "hb-open-types-private.h"
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/*
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*
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* The OpenType Font File
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*
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*/
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/*
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* Organization of an OpenType Font
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*/
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struct OpenTypeFontFile;
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struct OffsetTable;
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struct TTCHeader;
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typedef struct TableDirectory
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{
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Tag tag; /* 4-byte identifier. */
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CheckSum checkSum; /* CheckSum for this table. */
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ULONG offset; /* Offset from beginning of TrueType font
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* file. */
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ULONG length; /* Length of this table. */
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} OpenTypeTable;
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ASSERT_SIZE (TableDirectory, 16);
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typedef struct OffsetTable
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{
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friend struct OpenTypeFontFile;
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friend struct TTCHeader;
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DEFINE_TAG_ARRAY_INTERFACE (OpenTypeTable, table); /* get_table_count(), get_table(i), get_table_tag(i) */
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DEFINE_TAG_FIND_INTERFACE (OpenTypeTable, table); /* find_table_index(tag), get_table_by_tag(tag) */
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private:
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/* OpenTypeTables, in no particular order */
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DEFINE_ARRAY_TYPE (TableDirectory, tableDir, numTables);
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private:
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Tag sfnt_version; /* '\0\001\0\00' if TrueType / 'OTTO' if CFF */
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USHORT numTables; /* Number of tables. */
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USHORT searchRange; /* (Maximum power of 2 <= numTables) x 16 */
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USHORT entrySelector; /* Log2(maximum power of 2 <= numTables). */
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USHORT rangeShift; /* NumTables x 16-searchRange. */
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TableDirectory tableDir[]; /* TableDirectory entries. numTables items */
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} OpenTypeFontFace;
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ASSERT_SIZE (OffsetTable, 12);
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/*
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* TrueType Collections
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*/
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struct TTCHeader
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{
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friend struct OpenTypeFontFile;
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STATIC_DEFINE_GET_FOR_DATA_CHECK_MAJOR_VERSION (TTCHeader, 2);
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private:
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Tag ttcTag; /* TrueType Collection ID string: 'ttcf' */
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FixedVersion version; /* Version of the TTC Header (1.0 or 2.0),
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* 0x00010000 or 0x00020000 */
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LongOffsetLongArrayOf<OffsetTable>
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table; /* Array of offsets to the OffsetTable for each font
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* from the beginning of the file */
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};
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ASSERT_SIZE (TTCHeader, 12);
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/*
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* OpenType Font File
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*/
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struct OpenTypeFontFile
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{
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static const hb_tag_t TrueTypeTag = HB_TAG ( 0 , 1 , 0 , 0 );
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static const hb_tag_t CFFTag = HB_TAG ('O','T','T','O');
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static const hb_tag_t TTCTag = HB_TAG ('t','t','c','f');
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STATIC_DEFINE_GET_FOR_DATA (OpenTypeFontFile);
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unsigned int get_face_count (void) const
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{
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switch (tag) {
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default: return 0;
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case TrueTypeTag: case CFFTag: return 1;
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case TTCTag: return TTCHeader::get_for_data ((const char *) this).table.len;
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}
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}
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const OpenTypeFontFace& get_face (unsigned int i) const
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{
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switch (tag) {
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default: return Null(OpenTypeFontFace);
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/* Note: for non-collection SFNT data we ignore index. This is because
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* Apple dfont container is a container of SFNT's. So each SFNT is a
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* non-TTC, but the index is more than zero. */
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case TrueTypeTag: case CFFTag: return *(const OffsetTable*)this;
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case TTCTag: return this+TTCHeader::get_for_data ((const char *) this).table[i];
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}
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}
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/* This is how you get a table */
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inline const char* get_table_data (const OpenTypeTable& table) const
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{
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if (HB_UNLIKELY (table.offset == 0)) return NULL;
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return ((const char*) this) + table.offset;
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}
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Tag tag; /* 4-byte identifier. */
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};
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ASSERT_SIZE (OpenTypeFontFile, 4);
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#endif /* HB_OPEN_FILE_PRIVATE_H */
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@ -24,14 +24,10 @@
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* Red Hat Author(s): Behdad Esfahbod
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*/
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#ifndef HB_OT_LAYOUT_OPEN_PRIVATE_H
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#define HB_OT_LAYOUT_OPEN_PRIVATE_H
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#ifndef HB_OPEN_TYPES_PRIVATE_H
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#define HB_OPEN_TYPES_PRIVATE_H
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#ifndef HB_OT_LAYOUT_CC
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#error "This file should only be included from hb-ot-layout.cc"
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#endif
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#include "hb-ot-layout-private.h"
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#include "hb-private.h"
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#define NO_INDEX ((unsigned int) 0xFFFF)
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@ -387,109 +383,4 @@ struct LongOffsetLongArrayOf : LongArrayOf<LongOffsetTo<Type> > {};
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}
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/*
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* Organization of an OpenType Font
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*/
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struct OpenTypeFontFile;
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struct OffsetTable;
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struct TTCHeader;
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typedef struct TableDirectory
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{
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Tag tag; /* 4-byte identifier. */
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CheckSum checkSum; /* CheckSum for this table. */
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ULONG offset; /* Offset from beginning of TrueType font
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* file. */
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ULONG length; /* Length of this table. */
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} OpenTypeTable;
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ASSERT_SIZE (TableDirectory, 16);
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typedef struct OffsetTable
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{
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friend struct OpenTypeFontFile;
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friend struct TTCHeader;
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DEFINE_TAG_ARRAY_INTERFACE (OpenTypeTable, table); /* get_table_count(), get_table(i), get_table_tag(i) */
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DEFINE_TAG_FIND_INTERFACE (OpenTypeTable, table); /* find_table_index(tag), get_table_by_tag(tag) */
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private:
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/* OpenTypeTables, in no particular order */
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DEFINE_ARRAY_TYPE (TableDirectory, tableDir, numTables);
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private:
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Tag sfnt_version; /* '\0\001\0\00' if TrueType / 'OTTO' if CFF */
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USHORT numTables; /* Number of tables. */
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USHORT searchRange; /* (Maximum power of 2 <= numTables) x 16 */
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USHORT entrySelector; /* Log2(maximum power of 2 <= numTables). */
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USHORT rangeShift; /* NumTables x 16-searchRange. */
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TableDirectory tableDir[]; /* TableDirectory entries. numTables items */
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} OpenTypeFontFace;
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ASSERT_SIZE (OffsetTable, 12);
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/*
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* TrueType Collections
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*/
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struct TTCHeader
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{
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friend struct OpenTypeFontFile;
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STATIC_DEFINE_GET_FOR_DATA_CHECK_MAJOR_VERSION (TTCHeader, 2);
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private:
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Tag ttcTag; /* TrueType Collection ID string: 'ttcf' */
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FixedVersion version; /* Version of the TTC Header (1.0 or 2.0),
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* 0x00010000 or 0x00020000 */
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LongOffsetLongArrayOf<OffsetTable>
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table; /* Array of offsets to the OffsetTable for each font
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* from the beginning of the file */
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};
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ASSERT_SIZE (TTCHeader, 12);
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/*
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* OpenType Font File
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*/
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struct OpenTypeFontFile
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{
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static const hb_tag_t TrueTypeTag = HB_TAG ( 0 , 1 , 0 , 0 );
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static const hb_tag_t CFFTag = HB_TAG ('O','T','T','O');
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static const hb_tag_t TTCTag = HB_TAG ('t','t','c','f');
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STATIC_DEFINE_GET_FOR_DATA (OpenTypeFontFile);
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unsigned int get_face_count (void) const
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{
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switch (tag) {
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default: return 0;
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case TrueTypeTag: case CFFTag: return 1;
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case TTCTag: return TTCHeader::get_for_data ((const char *) this).table.len;
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}
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}
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const OpenTypeFontFace& get_face (unsigned int i) const
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{
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switch (tag) {
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default: return Null(OpenTypeFontFace);
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/* Note: for non-collection SFNT data we ignore index. This is because
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* Apple dfont container is a container of SFNT's. So each SFNT is a
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* non-TTC, but the index is more than zero. */
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case TrueTypeTag: case CFFTag: return *(const OffsetTable*)this;
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case TTCTag: return this+TTCHeader::get_for_data ((const char *) this).table[i];
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}
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}
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/* This is how you get a table */
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inline const char* get_table_data (const OpenTypeTable& table) const
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{
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if (HB_UNLIKELY (table.offset == 0)) return NULL;
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return ((const char*) this) + table.offset;
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}
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Tag tag; /* 4-byte identifier. */
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};
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ASSERT_SIZE (OpenTypeFontFile, 4);
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#endif /* HB_OT_LAYOUT_OPEN_PRIVATE_H */
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#endif /* HB_OPEN_TYPES_PRIVATE_H */
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@ -27,7 +27,9 @@
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#ifndef HB_OT_LAYOUT_COMMON_PRIVATE_H
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#define HB_OT_LAYOUT_COMMON_PRIVATE_H
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#include "hb-ot-layout-open-private.h"
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#include "hb-ot-layout-private.h"
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#include "hb-open-types-private.h"
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/*
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@ -30,7 +30,7 @@
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#include "hb-ot-layout-private.h"
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#include "hb-ot-layout-open-private.h"
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#include "hb-open-file-private.h"
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#include "hb-ot-layout-gdef-private.h"
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#include "hb-ot-layout-gsub-private.h"
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#include "hb-ot-layout-gpos-private.h"
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@ -25,9 +25,9 @@
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*/
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#define HB_OT_LAYOUT_CC
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#include "hb-ot-layout-open-private.h"
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#include "hb-open-file-private.h"
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#include "hb-ot-layout-gdef-private.h"
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#include "hb-ot-layout-gsub-private.h"
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#include "hb-ot-layout-gsubgpos-private.h"
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#include <glib.h>
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#include <stdlib.h>
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