715 lines
19 KiB
C
715 lines
19 KiB
C
/*
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* ttfaux.c
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*
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* This file is part of the ttf2pk package.
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*
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* Copyright 1997-1999 by
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* Frederic Loyer <loyer@ensta.fr>
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* Werner Lemberg <wl@gnu.org>
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*/
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#include <math.h>
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#include <string.h>
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#include <stdlib.h>
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#include "freetype.h"
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#include "extend/ftxkern.h" /* we are in the FreeType package tree */
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#include "extend/ftxpost.h"
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#include "extend/ftxopen.h"
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#include "ttf2tfm.h"
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#include "newobj.h"
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#include "ligkern.h"
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#include "ttfenc.h"
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#include "tfmaux.h"
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#include "errormsg.h"
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#include "ttfaux.h"
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#include "filesrch.h"
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#define Macintosh_platform 1
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#define Macintosh_encoding 0
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#define Microsoft_platform 3
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#define Microsoft_Unicode_encoding 1
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#define SCRIPT_kana MAKE_TT_TAG('k', 'a', 'n', 'a')
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#define SCRIPT_hani MAKE_TT_TAG('h', 'a', 'n', 'i')
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#define SCRIPT_hang MAKE_TT_TAG('h', 'a', 'n', 'g')
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#define LANGUAGE_JAN MAKE_TT_TAG('J', 'A', 'N', ' ')
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#define LANGUAGE_CHN MAKE_TT_TAG('C', 'H', 'N', ' ')
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#define LANGUAGE_KOR MAKE_TT_TAG('K', 'O', 'R', ' ')
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#define FEATURE_vert MAKE_TT_TAG('v', 'e', 'r', 't')
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extern char progname[];
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char *real_ttfname;
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TT_Engine engine;
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TT_Face face;
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TT_Instance instance;
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TT_Glyph glyph;
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TT_Outline outline;
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TT_CharMap char_map;
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TT_Matrix matrix1, matrix2;
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TT_Big_Glyph_Metrics metrics;
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TT_Face_Properties properties;
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TT_BBox bbox;
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TT_Kerning directory;
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TT_Post post;
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TTO_GSUBHeader gsub_;
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TTO_GSUBHeader *gsub;
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Boolean has_gsub;
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static void
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readttf_kern(Font *fnt)
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{
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register kern *nk;
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register ttfinfo *ti;
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TT_Kern_0_Pair* pairs0;
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TT_Error error;
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unsigned int i, j;
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if ((error = TT_Get_Kerning_Directory(face, &directory)))
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oops("Cannot get kerning directory (error code = 0x%x).", error);
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if (directory.nTables == 0)
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return;
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for (i = 0; i < directory.nTables; i++)
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{
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if ((error = TT_Load_Kerning_Table(face, i)))
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oops("Cannot load kerning table (error code = 0x%x).", error);
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switch (directory.tables[i].format)
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{
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case 0:
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pairs0 = directory.tables[i].t.kern0.pairs;
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for (j = 0; j < directory.tables[i].t.kern0.nPairs; j++, pairs0++)
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{
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ti = findglyph(pairs0->left, fnt->charlist);
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if (ti == NULL)
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warning("kern char not found");
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else
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{
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nk = newkern();
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nk->succ = findglyph(pairs0->right, fnt->charlist)->adobename;
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nk->delta = transform(pairs0->value * 1000 / fnt->units_per_em, 0,
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fnt->efactor, fnt->slant);
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nk->next = ti->kerns;
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ti->kerns = nk;
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}
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}
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return; /* we stop after the first format 0 kerning table */
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default:
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break;
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}
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}
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return;
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}
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void
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readttf(Font *fnt, Boolean quiet, Boolean only_range)
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{
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TT_Error error;
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ttfinfo *ti, *Ti;
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long Num, index;
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unsigned int i, j;
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long k, max_k;
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unsigned short num_cmap;
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unsigned short cmap_plat, cmap_enc;
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int index_array[257];
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static Boolean initialized = False;
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TT_UShort in_string[2];
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TTO_GSUB_String in, out;
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TT_UShort script_index, language_index, feature_index;
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TT_UShort req_feature_index = 0xFFFF;
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/*
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* We allocate a placeholder boundary and the `.notdef' character.
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*/
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if (!only_range)
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{
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ti = newchar(fnt);
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ti->charcode = -1;
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ti->adobename = ".notdef";
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ti = newchar(fnt);
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ti->charcode = -1;
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ti->adobename = "||"; /* boundary character name */
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}
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/*
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* Initialize FreeType engine.
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*/
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if (!initialized)
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{
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if ((error = TT_Init_FreeType(&engine)))
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oops("Cannot initialize engine (error code = 0x%x).", error);
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if ((error = TT_Init_Kerning_Extension(engine)))
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oops("Cannot initialize kerning (error code = 0x%x).", error);
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if (fnt->PSnames)
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if ((error = TT_Init_Post_Extension(engine)))
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oops("Cannot initialize PS name support (error code = 0x%x).", error);
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if (fnt->rotate)
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if ((error = TT_Init_GSUB_Extension(engine)))
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oops("Cannot initialize GSUB support (error code = 0x%x).", error);
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/*
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* Load face.
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*/
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real_ttfname = TeX_search_ttf_file(&(fnt->ttfname));
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if (!real_ttfname)
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oops("Cannot find `%s'.", fnt->ttfname);
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if ((error = TT_Open_Face(engine, real_ttfname, &face)))
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oops("Cannot open `%s'.", real_ttfname);
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/*
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* Get face properties and allocate preload arrays.
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*/
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TT_Get_Face_Properties(face, &properties);
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/*
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* Now we try to open the proper font in a collection.
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*/
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if (fnt->fontindex != 0)
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{
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if (properties.num_Faces == 1)
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{
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warning("This isn't a TrueType collection.\n"
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"Parameter `-f' is ignored.");
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fnt->fontindex = 0;
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fnt->fontindexparam = NULL;
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}
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else
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{
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TT_Close_Face(face);
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if ((error = TT_Open_Collection(engine, real_ttfname,
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fnt->fontindex, &face)))
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oops("Cannot open font %lu in TrueType Collection `%s'.",
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fnt->fontindex, real_ttfname);
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}
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}
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/*
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* Create instance.
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*/
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if ((error = TT_New_Instance(face, &instance)))
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oops("Cannot create instance for `%s' (error code = 0x%x).",
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real_ttfname, error);
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/*
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* We use a dummy glyph size of 10pt.
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*/
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if ((error = TT_Set_Instance_CharSize(instance, 10 * 64)))
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oops("Cannot set character size (error code = 0x%x).", error);
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matrix1.xx = (TT_Fixed)(floor(fnt->efactor * 1024) * (1L<<16)/1024);
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matrix1.xy = (TT_Fixed)(floor(fnt->slant * 1024) * (1L<<16)/1024);
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matrix1.yx = (TT_Fixed)0;
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matrix1.yy = (TT_Fixed)(1L<<16);
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if (fnt->rotate)
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{
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matrix2.xx = 0;
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matrix2.yx = 1L << 16;
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matrix2.xy = -matrix2.yx;
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matrix2.yy = matrix2.xx;
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}
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if ((error = TT_Set_Instance_Transform_Flags(
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instance,
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fnt->rotate ? 1 : 0,
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fnt->efactor != 1.0 ? 1 : 0)))
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oops("Cannot set transform flags (error code = 0x%x).", error);
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/*
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* Create glyph container.
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*/
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if ((error = TT_New_Glyph(face, &glyph)))
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oops("Cannot create glyph container (error code = 0x%x).", error);
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fnt->units_per_em = properties.header->Units_Per_EM;
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fnt->fixedpitch = properties.postscript->isFixedPitch;
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fnt->italicangle = properties.postscript->italicAngle / 65536.0;
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if (fnt->PSnames != Only)
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{
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num_cmap = properties.num_CharMaps;
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for (i = 0; i < num_cmap; i++)
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{
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if ((error = TT_Get_CharMap_ID(face, i, &cmap_plat, &cmap_enc)))
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oops("Cannot query cmap (error code = 0x%x).", error);
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if (cmap_plat == fnt->pid && cmap_enc == fnt->eid)
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break;
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}
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if (i == num_cmap)
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{
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fprintf(stderr, "%s: ERROR: Invalid platform and/or encoding ID.\n",
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progname);
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if (num_cmap == 1)
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fprintf(stderr, " The only valid PID/EID pair is");
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else
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fprintf(stderr, " Valid PID/EID pairs are:\n");
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for (i = 0; i < num_cmap; i++)
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{
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TT_Get_CharMap_ID(face, i, &cmap_plat, &cmap_enc);
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fprintf(stderr, " (%i,%i)\n", cmap_plat, cmap_enc);
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}
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fprintf(stderr, "\n");
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exit(1);
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}
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if ((error = TT_Get_CharMap(face, i, &char_map)))
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oops("Cannot load cmap (error code = 0x%x).", error);
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}
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if (fnt->PSnames)
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{
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if ((error = TT_Load_PS_Names(face, &post)))
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oops("Cannot load TrueType PS names (error code = 0x%x).", error);
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}
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else if (cmap_plat == Microsoft_platform &&
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cmap_enc == Microsoft_Unicode_encoding)
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set_encoding_scheme(encUnicode, fnt);
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else if (cmap_plat == Macintosh_platform &&
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cmap_enc == Macintosh_encoding)
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set_encoding_scheme(encMac, fnt);
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else
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set_encoding_scheme(encFontSpecific, fnt);
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if (fnt->rotate)
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{
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gsub = &gsub_;
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error = TT_Load_GSUB_Table(face, gsub, NULL);
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if (!error)
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has_gsub = True;
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else if (error != TT_Err_Table_Missing)
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warning("Cannot load GSUB table (error code = 0x%x).", error);
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else
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warning("No GSUB data available "
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"for vertical glyph presentation forms.");
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/* we check for the `vert' feature in Chinese, Japanese, and Korean */
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error = TT_GSUB_Select_Script(gsub,
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SCRIPT_kana,
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&script_index);
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if (error)
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goto check_hani;
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error = TT_GSUB_Select_Feature(gsub,
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FEATURE_vert,
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script_index,
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0xFFFF,
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&feature_index);
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if (error)
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{
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error = TT_GSUB_Select_Language(gsub,
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LANGUAGE_JAN,
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script_index,
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&language_index,
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&req_feature_index);
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if (error)
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goto check_hani;
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error = TT_GSUB_Select_Feature(gsub,
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FEATURE_vert,
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script_index,
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language_index,
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&feature_index);
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if (error)
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goto check_hani;
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else
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goto Done;
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}
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else
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goto Done;
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check_hani:
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error = TT_GSUB_Select_Script(gsub,
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SCRIPT_hani,
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&script_index);
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if (error)
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goto check_hang;
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error = TT_GSUB_Select_Feature(gsub,
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FEATURE_vert,
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script_index,
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0xFFFF,
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&feature_index);
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if (error)
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{
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error = TT_GSUB_Select_Language(gsub,
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LANGUAGE_CHN,
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script_index,
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&language_index,
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&req_feature_index);
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if (error)
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goto check_hang;
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error = TT_GSUB_Select_Feature(gsub,
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FEATURE_vert,
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script_index,
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language_index,
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&feature_index);
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if (error)
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goto check_hang;
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else
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goto Done;
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}
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else
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goto Done;
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check_hang:
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error = TT_GSUB_Select_Script(gsub,
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SCRIPT_hang,
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&script_index);
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if (error)
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goto Done;
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error = TT_GSUB_Select_Feature(gsub,
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FEATURE_vert,
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script_index,
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0xFFFF,
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&feature_index);
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if (error)
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{
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error = TT_GSUB_Select_Language(gsub,
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LANGUAGE_KOR,
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script_index,
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&language_index,
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&req_feature_index);
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if (error)
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goto Done;
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error = TT_GSUB_Select_Feature(gsub,
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FEATURE_vert,
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script_index,
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language_index,
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&feature_index);
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}
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Done:
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if (error)
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{
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warning("There is no data for vertical typesetting in GSUB table.");
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has_gsub = False;
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}
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if (req_feature_index != 0xFFFF)
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TT_GSUB_Add_Feature(gsub, req_feature_index, ALL_GLYPHS);
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TT_GSUB_Add_Feature(gsub, feature_index, ALL_GLYPHS);
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in.length = 1;
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in.pos = 0;
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in.string = in_string;
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in.properties = NULL;
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out.pos = 0;
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out.allocated = 0;
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out.string = NULL;
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out.properties = NULL;
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}
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initialized = True;
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}
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if (!quiet)
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{
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if (only_range)
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printf("\n\n%s:\n", fnt->fullname);
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printf("\n");
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printf("Glyph Code Glyph Name ");
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printf("Width llx lly urx ury\n");
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printf("---------------------------------------");
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printf("---------------------------------\n");
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}
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/*
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* We load only glyphs with a valid cmap entry. Nevertheless, for
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* the default mapping, we use the first 256 glyphs addressed by
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* ascending code points, followed by glyphs not in the cmap.
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*
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* If we compute a range, we take the character codes given in
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* the fnt->sf_code array.
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*
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* If the -N flag is set, no cmap is used at all. Instead, the
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* first 256 glyphs (with a valid PS name) are used for the default
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* mapping.
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*/
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if (!only_range)
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for (i = 0; i < 257; i++)
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index_array[i] = 0;
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else
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for (i = 0; i < 256; i++)
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fnt->inencptrs[i] = 0;
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j = 0;
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if (fnt->PSnames == Only)
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max_k = properties.num_Glyphs - 1;
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else
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max_k = only_range ? 0xFF : 0xFFFF;
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for (k = 0; k <= max_k; k++)
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{
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char *an;
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if (fnt->PSnames != Only)
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{
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if (only_range)
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{
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index = fnt->sf_code[k];
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if (index < 0)
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continue;
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j = k;
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}
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else
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index = k;
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Num = TT_Char_Index(char_map, index);
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/* now we try to get a vertical glyph form */
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if (has_gsub)
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{
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in_string[0] = Num;
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error = TT_GSUB_Apply_String(gsub, &in, &out);
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if (error && error != TTO_Err_Not_Covered)
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warning("Cannot get the vertical glyph form for glyph index %d.",
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Num);
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else
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Num = out.string[0];
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}
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if (Num < 0)
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oops("Failure on cmap mapping from %s.", fnt->ttfname);
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if (Num == 0)
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continue;
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if (!only_range)
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if (Num <= 256)
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index_array[Num] = 1;
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}
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else
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{
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Num = k;
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index = 0;
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}
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error = TT_Load_Glyph(instance, glyph, Num, 0);
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if (!error)
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error = TT_Get_Glyph_Big_Metrics(glyph, &metrics);
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if (!error)
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error = TT_Get_Glyph_Outline(glyph, &outline);
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if (!error)
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{
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if (fnt->efactor != 1.0 || fnt->slant != 0.0 )
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TT_Transform_Outline(&outline, &matrix1);
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if (fnt->rotate)
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TT_Transform_Outline(&outline, &matrix2);
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}
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if (!error)
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error = TT_Get_Outline_BBox(&outline, &bbox); /* we need the non-
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grid-fitted bbox */
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if (!error)
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{
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if (fnt->PSnames)
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(void)TT_Get_PS_Name(face, Num, &an);
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else
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an = code_to_adobename(index);
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/* ignore characters not usable for typesetting with TeX */
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if (strcmp(an, ".notdef") == 0)
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continue;
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if (strcmp(an, ".null") == 0)
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continue;
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if (strcmp(an, "nonmarkingreturn") == 0)
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continue;
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ti = newchar(fnt);
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ti->charcode = index;
|
|
ti->glyphindex = Num;
|
|
ti->adobename = an;
|
|
ti->llx = bbox.xMin * 1000 / fnt->units_per_em;
|
|
ti->lly = bbox.yMin * 1000 / fnt->units_per_em;
|
|
ti->urx = bbox.xMax * 1000 / fnt->units_per_em;
|
|
ti->ury = bbox.yMax * 1000 / fnt->units_per_em;
|
|
|
|
/*
|
|
* We must now shift the rotated character both horizontally
|
|
* and vertically. The vertical amount is 25% by default.
|
|
*/
|
|
|
|
if (fnt->rotate)
|
|
{
|
|
ti->llx += (metrics.vertBearingY - bbox.xMin) *
|
|
1000 / fnt->units_per_em;
|
|
ti->lly -= 1000 * fnt->y_offset;
|
|
ti->urx += (metrics.vertBearingY - bbox.xMin) *
|
|
1000 / fnt->units_per_em;
|
|
ti->ury -= 1000 * fnt->y_offset;
|
|
}
|
|
|
|
/*
|
|
* We need to avoid negative heights or depths. They break accents
|
|
* in math mode, among other things.
|
|
*/
|
|
|
|
if (ti->lly > 0)
|
|
ti->lly = 0;
|
|
if (ti->ury < 0)
|
|
ti->ury = 0;
|
|
if (fnt->rotate)
|
|
ti->width = metrics.vertAdvance * 1000 / fnt->units_per_em;
|
|
else
|
|
ti->width = transform(metrics.horiAdvance * 1000 / fnt->units_per_em,
|
|
0, fnt->efactor, fnt->slant);
|
|
|
|
if (!quiet)
|
|
printf("%5ld %04lx %-25s %5d % 5d,% 5d -- % 5d,% 5d\n",
|
|
Num, index, ti->adobename,
|
|
ti->width,
|
|
ti->llx, ti->lly, ti->urx, ti->ury);
|
|
|
|
if (j < 256)
|
|
{
|
|
fnt->inencptrs[j] = ti;
|
|
ti->incode = j;
|
|
}
|
|
j++;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Now we load glyphs without a cmap entry, provided some slots are
|
|
* still free -- we skip this if we have to compute a range or use
|
|
* PS names.
|
|
*/
|
|
|
|
if (!only_range && !fnt->PSnames)
|
|
{
|
|
for (i = 1; i <= properties.num_Glyphs; i++)
|
|
{
|
|
char *an;
|
|
|
|
|
|
if (index_array[i] == 0)
|
|
{
|
|
error = TT_Load_Glyph(instance, glyph, i, 0);
|
|
if (!error)
|
|
error = TT_Get_Glyph_Big_Metrics(glyph, &metrics);
|
|
if (!error)
|
|
error = TT_Get_Glyph_Outline(glyph, &outline);
|
|
if (!error)
|
|
error = TT_Get_Outline_BBox(&outline, &bbox);
|
|
if (!error)
|
|
{
|
|
an = code_to_adobename(i | 0x10000);
|
|
|
|
ti = newchar(fnt);
|
|
ti->charcode = i | 0x10000;
|
|
ti->glyphindex = i;
|
|
ti->adobename = an;
|
|
ti->llx = bbox.xMin * 1000 / fnt->units_per_em;
|
|
ti->lly = bbox.yMin * 1000 / fnt->units_per_em;
|
|
ti->urx = bbox.xMax * 1000 / fnt->units_per_em;
|
|
ti->ury = bbox.yMax * 1000 / fnt->units_per_em;
|
|
|
|
if (ti->lly > 0)
|
|
ti->lly = 0;
|
|
if (ti->ury < 0)
|
|
ti->ury = 0;
|
|
ti->width = transform(metrics.horiAdvance*1000 / fnt->units_per_em,
|
|
0, fnt->efactor, fnt->slant);
|
|
|
|
if (!quiet)
|
|
printf("%5d %-25s %5d % 5d,% 5d -- % 5d,% 5d\n",
|
|
i, ti->adobename,
|
|
ti->width,
|
|
ti->llx, ti->lly, ti->urx, ti->ury);
|
|
|
|
if (j < 256)
|
|
{
|
|
fnt->inencptrs[j] = ti;
|
|
ti->incode = j;
|
|
}
|
|
else
|
|
break;
|
|
j++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Finally, we construct a `Germandbls' glyph if necessary */
|
|
|
|
if (!only_range)
|
|
{
|
|
if (NULL == findadobe("Germandbls", fnt->charlist) &&
|
|
NULL != (Ti = findadobe("S", fnt->charlist)))
|
|
{
|
|
pcc *np, *nq;
|
|
|
|
|
|
ti = newchar(fnt);
|
|
ti->charcode = properties.num_Glyphs | 0x10000;
|
|
ti->glyphindex = properties.num_Glyphs;
|
|
ti->adobename = "Germandbls";
|
|
ti->width = Ti->width << 1;
|
|
ti->llx = Ti->llx;
|
|
ti->lly = Ti->lly;
|
|
ti->urx = Ti->width + Ti->urx;
|
|
ti->ury = Ti->ury;
|
|
ti->kerns = Ti->kerns;
|
|
|
|
np = newpcc();
|
|
np->partname = "S";
|
|
nq = newpcc();
|
|
nq->partname = "S";
|
|
nq->xoffset = Ti->width;
|
|
np->next = nq;
|
|
ti->pccs = np;
|
|
ti->constructed = True;
|
|
|
|
if (!quiet)
|
|
printf("* %-25s %5d % 5d,% 5d -- % 5d,% 5d\n",
|
|
ti->adobename,
|
|
ti->width,
|
|
ti->llx, ti->lly, ti->urx, ti->ury);
|
|
}
|
|
}
|
|
|
|
/* kerning between subfonts isn't available */
|
|
if (!only_range)
|
|
readttf_kern(fnt);
|
|
}
|
|
|
|
|
|
/* end */
|