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t1fontskel.cc

/* t1fontskel.{cc,hh} -- Type 1 font skeleton
 *
 * Copyright (c) 1998-2004 Eddie Kohler
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version. This program is distributed in the hope that it will be
 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
 * Public License for more details.
 */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <efont/t1font.hh>
#include <efont/t1item.hh>
#include <efont/t1rw.hh>
#include <efont/t1mm.hh>
#include <lcdf/error.hh>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
namespace Efont {

static const char *othersubrs_code = "% Copyright (c) 1987-1990 Adobe Systems Incorporated.\n"
"% All Rights Reserved.\n"
"% This code to be used for Flex and hint replacement.\n"
"% Version 1.1\n"
"/OtherSubrs\n"
"[systemdict /internaldict known\n"
"{1183615869 systemdict /internaldict get exec\n"
"/FlxProc known {save true} {false} ifelse}\n"
"{userdict /internaldict known not {\n"
"userdict /internaldict\n"
"{count 0 eq\n"
"{/internaldict errordict /invalidaccess get exec} if\n"
"dup type /integertype ne\n"
"{/internaldict errordict /invalidaccess get exec} if\n"
"dup 1183615869 eq\n"
"{pop 0}\n"
"{/internaldict errordict /invalidaccess get exec}\n"
"ifelse\n"
"}\n"
"dup 14 get 1 25 dict put\n"
"bind executeonly put\n"
"} if\n"
"1183615869 userdict /internaldict get exec\n"
"/FlxProc known {save true} {false} ifelse}\n"
"ifelse\n"
"[\n"
"systemdict /internaldict known not\n"
"{ 100 dict /begin cvx /mtx matrix /def cvx } if\n"
"systemdict /currentpacking known {currentpacking true setpacking} if\n"
"{\n"
"systemdict /internaldict known {\n"
"1183615869 systemdict /internaldict get exec\n"
"dup /$FlxDict known not {\n"
"dup dup length exch maxlength eq\n"
"{ pop userdict dup /$FlxDict known not\n"
"{ 100 dict begin /mtx matrix def\n"
"\n"
"dup /$FlxDict currentdict put end } if }\n"
"{ 100 dict begin /mtx matrix def\n"
"dup /$FlxDict currentdict put end }\n"
"ifelse\n"
"} if\n"
"/$FlxDict get begin\n"
"} if\n"
"grestore\n"
"/exdef {exch def} def\n"
"/dmin exch abs 100 div def\n"
"/epX exdef /epY exdef\n"
"/c4y2 exdef /c4x2 exdef /c4y1 exdef /c4x1 exdef /c4y0 exdef /c4x0 exdef\n"
"/c3y2 exdef /c3x2 exdef /c3y1 exdef /c3x1 exdef /c3y0 exdef /c3x0 exdef\n"
"/c1y2 exdef /c1x2 exdef /c2x2 c4x2 def /c2y2 c4y2 def\n"
"/yflag c1y2 c3y2 sub abs c1x2 c3x2 sub abs gt def\n"
"/PickCoords {\n"
"{c1x0 c1y0 c1x1 c1y1 c1x2 c1y2 c2x0 c2y0 c2x1 c2y1 c2x2 c2y2 }\n"
"{c3x0 c3y0 c3x1 c3y1 c3x2 c3y2 c4x0 c4y0 c4x1 c4y1 c4x2 c4y2 }\n"
"ifelse\n"
"/y5 exdef /x5 exdef /y4 exdef /x4 exdef /y3 exdef /x3 exdef\n"
"/y2 exdef /x2 exdef /y1 exdef /x1 exdef /y0 exdef /x0 exdef\n"
"} def\n"
"mtx currentmatrix pop\n"
"mtx 0 get abs .00001 lt mtx 3 get abs .00001 lt or\n"
"{/flipXY -1 def }\n"
"{mtx 1 get abs .00001 lt mtx 2 get abs .00001 lt or\n"
"{/flipXY 1 def }\n"
"{/flipXY 0 def }\n"
"ifelse }\n"
"ifelse\n"
"/erosion 1 def\n"
"systemdict /internaldict known {\n"
"1183615869 systemdict /internaldict get exec dup\n"
"/erosion known\n"
"{/erosion get /erosion exch def}\n"
"{pop}\n"
"ifelse\n"
"} if\n"
"yflag\n"
"{flipXY 0 eq c3y2 c4y2 eq or\n"
"{false PickCoords }\n"
"{/shrink c3y2 c4y2 eq\n"
"{0}{c1y2 c4y2 sub c3y2 c4y2 sub div abs} ifelse def\n"
"/yshrink {c4y2 sub shrink mul c4y2 add} def\n"
"/c1y0 c3y0 yshrink def /c1y1 c3y1 yshrink def\n"
"/c2y0 c4y0 yshrink def /c2y1 c4y1 yshrink def\n"
"/c1x0 c3x0 def /c1x1 c3x1 def /c2x0 c4x0 def /c2x1 c4x1 def\n"
"/dY 0 c3y2 c1y2 sub round\n"
"dtransform flipXY 1 eq {exch} if pop abs def\n"
"dY dmin lt PickCoords\n"
"y2 c1y2 sub abs 0.001 gt {\n"
"c1x2 c1y2 transform flipXY 1 eq {exch} if\n"
"/cx exch def /cy exch def\n"
"/dY 0 y2 c1y2 sub round dtransform flipXY 1 eq {exch}\n"
"if pop def\n"
"dY round dup 0 ne\n"
"{/dY exdef }\n"
"{pop dY 0 lt {-1}{1} ifelse /dY exdef }\n"
"ifelse\n"
"/erode PaintType 2 ne erosion 0.5 ge and def\n"
"erode {/cy cy 0.5 sub def} if\n"
"/ey cy dY add def\n"
"/ey ey ceiling ey sub ey floor add def\n"
"erode {/ey ey 0.5 add def} if\n"
"ey cx flipXY 1 eq {exch} if itransform exch pop\n"
"y2 sub /eShift exch def\n"
"/y1 y1 eShift add def /y2 y2 eShift add def /y3 y3\n"
"eShift add def\n"
"} if\n"
"} ifelse\n"
"}\n"
"{flipXY 0 eq c3x2 c4x2 eq or\n"
"{false PickCoords }\n"
"{/shrink c3x2 c4x2 eq\n"
"{0}{c1x2 c4x2 sub c3x2 c4x2 sub div abs} ifelse def\n"
"/xshrink {c4x2 sub shrink mul c4x2 add} def\n"
"/c1x0 c3x0 xshrink def /c1x1 c3x1 xshrink def\n"
"/c2x0 c4x0 xshrink def /c2x1 c4x1 xshrink def\n"
"/c1y0 c3y0 def /c1y1 c3y1 def /c2y0 c4y0 def /c2y1 c4y1 def\n"
"/dX c3x2 c1x2 sub round 0 dtransform\n"
"flipXY -1 eq {exch} if pop abs def\n"
"dX dmin lt PickCoords\n"
"x2 c1x2 sub abs 0.001 gt {\n"
"c1x2 c1y2 transform flipXY -1 eq {exch} if\n"
"/cy exch def /cx exch def\n"
"/dX x2 c1x2 sub round 0 dtransform flipXY -1 eq {exch} if pop def\n"
"dX round dup 0 ne\n"
"{/dX exdef }\n"
"{pop dX 0 lt {-1}{1} ifelse /dX exdef }\n"
"ifelse\n"
"/erode PaintType 2 ne erosion .5 ge and def\n"
"erode {/cx cx .5 sub def} if\n"
"/ex cx dX add def\n"
"/ex ex ceiling ex sub ex floor add def\n"
"erode {/ex ex .5 add def} if\n"
"ex cy flipXY -1 eq {exch} if itransform pop\n"
"x2 sub /eShift exch def\n"
"/x1 x1 eShift add def /x2 x2 eShift add def /x3 x3 eShift add def\n"
"} if\n"
"} ifelse\n"
"} ifelse\n"
"x2 x5 eq y2 y5 eq or\n"
"{ x5 y5 lineto }\n"
"{ x0 y0 x1 y1 x2 y2 curveto\n"
"x3 y3 x4 y4 x5 y5 curveto }\n"
"ifelse\n"
"epY epX\n"
"}\n"
"systemdict /currentpacking known {exch setpacking} if\n"
"/exec cvx /end cvx ] cvx\n"
"executeonly\n"
"exch\n"
"{pop true exch restore}\n"
"{\n"
"systemdict /internaldict known not\n"
"{1183615869 userdict /internaldict get exec\n"
"exch /FlxProc exch put true}\n"
"{1183615869 systemdict /internaldict get exec\n"
"dup length exch maxlength eq\n"
"{false}\n"
"{1183615869 systemdict /internaldict get exec\n"
"exch /FlxProc exch put true}\n"
"ifelse}\n"
"ifelse}\n"
"ifelse\n"
"{systemdict /internaldict known\n"
"{{1183615869 systemdict /internaldict get exec /FlxProc get exec}}\n"
"{{1183615869 userdict /internaldict get exec /FlxProc get exec}}\n"
"ifelse executeonly\n"
"} if\n"
"{gsave currentpoint newpath moveto} executeonly\n"
"{currentpoint grestore gsave currentpoint newpath moveto}\n"
"executeonly\n"
"{systemdict /internaldict known not\n"
"{pop 3}\n"
"{1183615869 systemdict /internaldict get exec\n"
"dup /startlock known\n"
"{/startlock get exec}\n"
"{dup /strtlck known\n"
"{/strtlck get exec}\n"
"{pop 3}\n"
"ifelse}\n"
"ifelse}\n"
"ifelse\n"
"} executeonly\n"
"] noaccess def";


Type1Font *
Type1Font::skeleton_make(PermString font_name, const String &version)
{
    Type1Font *output = new Type1Font(font_name);

    // %!PS-Adobe-Font comment
    StringAccum sa;
    sa << "%!PS-AdobeFont-1.0: " << font_name;
    if (version)
      sa << ' ' << version;
    output->add_item(new Type1CopyItem(sa.take_string()));

    output->_dict_deltas[dF] = 3; // Private, FontInfo, Encoding
    output->_dict_deltas[dP] = 3; // OtherSubrs, Subrs, CharStrings

    return output;
}

void
Type1Font::skeleton_comments_end()
{
    // count members of font dictionary
    add_definition(dF, new Type1Definition("FontName", "/" + String(_font_name), "def"));
}

void
Type1Font::skeleton_fontinfo_end()
{
    if (first_dict_item(Type1Font::dFI) >= 0)
      add_item(new Type1CopyItem("end readonly def"));
    else
      add_item(new Type1CopyItem("% no FontInfo dict"));
}

void
Type1Font::skeleton_fontdict_end()
{
    // switch to eexec
    add_item(new Type1CopyItem("currentdict end"));
    add_item(new Type1EexecItem(true));

    // Private dictionary
    add_definition(Type1Font::dP, Type1Definition::make_literal("-|", "{string currentfile exch readstring pop}", "executeonly def"));
    set_charstring_definer(" -| ");
    add_definition(Type1Font::dP, Type1Definition::make_literal("|-", "{noaccess def}", "executeonly def"));
    add_definition(Type1Font::dP, Type1Definition::make_literal("|", "{noaccess put}", "executeonly def"));
}

void
Type1Font::skeleton_private_end()
{
    add_item(new Type1CopyItem(othersubrs_code));

    // Subrs
    add_item(new Type1SubrGroupItem(this, true, "/Subrs 0 array"));
    add_item(new Type1CopyItem("|-"));
    
    // CharStrings
    add_item(new Type1SubrGroupItem(this, false, "2 index /CharStrings 0 dict dup begin"));

    // completion
    add_item(new Type1CopyItem("end\n\
end\n\
readonly put\n\
noaccess put\n\
dup /FontName get exch definefont pop\n\
mark currentfile closefile"));
    add_item(new Type1EexecItem(false));
    add_item(new Type1CopyItem("\
0000000000000000000000000000000000000000000000000000000000000000\n\
0000000000000000000000000000000000000000000000000000000000000000\n\
0000000000000000000000000000000000000000000000000000000000000000\n\
0000000000000000000000000000000000000000000000000000000000000000\n\
0000000000000000000000000000000000000000000000000000000000000000\n\
0000000000000000000000000000000000000000000000000000000000000000\n\
0000000000000000000000000000000000000000000000000000000000000000\n\
0000000000000000000000000000000000000000000000000000000000000000\n\
cleartomark"));
}

void
Type1Font::skeleton_common_subrs()
{
    // - first four Subrs have fixed definitions
    // - 0: "3 0 callothersubr pop pop setcurrentpoint return"
    set_subr(0, Type1Charstring(String::stable_string("\216\213\014\020\014\021\014\021\014\041\013", 11)), " |");
    // - 1: "0 1 callothersubr return"
    set_subr(1, Type1Charstring(String::stable_string("\213\214\014\020\013", 5)), " |");
    // - 2: "0 2 callothersubr return"
    set_subr(2, Type1Charstring(String::stable_string("\213\215\014\020\013", 5)), " |");
    // - 3: "return"
    set_subr(3, Type1Charstring(String::stable_string("\013", 1)), " |");
    // - 4: "1 3 callothersubr pop callsubr return"
    set_subr(4, Type1Charstring(String::stable_string("\214\216\014\020\014\021\012\013", 8)), " |");
}


static void
add_number_def(Type1Font *output, int dict, PermString name, const Type1Font *font)
{
    double v;
    if (Type1Definition *t1d = font->dict(dict, name))
      if (t1d->value_num(v))
          output->add_definition(dict, Type1Definition::make(name, v, "def"));
}

static void
add_copy_def(Type1Font *output, int dict, PermString name, const Type1Font *font, const char *definer = "def")
{
    if (Type1Definition *t1d = font->dict(dict, name))
      output->add_definition(dict, Type1Definition::make_literal(name, t1d->value(), definer));
}

static String
font_dict_string(const Type1Font *font, int dict, PermString name)
{
    String s;
    if (Type1Definition *d = font->dict(dict, name))
      if (d->value_string(s))
          return s;
    return String();
}

Type1Font *
Type1Font::skeleton_make_copy(const Type1Font *font, PermString font_name)
{
    String version = font_dict_string(font, dFI, "version");
    Type1Font *output = skeleton_make(font_name, version);

    // other comments from font header
    for (int i = 0; i < font->nitems(); i++)
      if (Type1CopyItem *c = font->item(i)->cast_copy()) {
          if (c->length() > 1 && c->value()[0] == '%') {
            if (c->value()[1] != '!')
                output->add_item(new Type1CopyItem(c->value()));
          } else
            break;
      } else
          break;

    output->skeleton_comments_end();

    // FontInfo dictionary
    if (version)
      output->add_definition(dFI, Type1Definition::make_string("version", version, "readonly def"));
    if (String s = font_dict_string(font, dFI, "Notice"))
      output->add_definition(dFI, Type1Definition::make_string("Notice", s, "readonly def"));
    if (String s = font_dict_string(font, dFI, "Copyright"))
      output->add_definition(dFI, Type1Definition::make_string("Copyright", s, "readonly def"));
    if (String s = font_dict_string(font, dFI, "FullName"))
      output->add_definition(dFI, Type1Definition::make_string("FullName", s, "readonly def"));
    if (String s = font_dict_string(font, dFI, "FamilyName"))
      output->add_definition(dFI, Type1Definition::make_string("FamilyName", s, "readonly def"));
    if (String s = font_dict_string(font, dFI, "Weight"))
      output->add_definition(dFI, Type1Definition::make_string("Weight", s, "readonly def"));
    if (Type1Definition *t1d = font->fi_dict("isFixedPitch")) {
      bool v;
      if (t1d->value_bool(v))
          output->add_definition(dFI, Type1Definition::make_literal("isFixedPitch", (v ? "true" : "false"), "def"));
    }
    add_number_def(output, dFI, "ItalicAngle", font);
    add_number_def(output, dFI, "UnderlinePosition", font);
    add_number_def(output, dFI, "UnderlineThickness", font);
    output->skeleton_fontinfo_end();
    
    // Encoding, other font dictionary entries
    output->add_type1_encoding(new Type1Encoding(*font->type1_encoding()));
    add_number_def(output, dF, "PaintType", font);
    add_number_def(output, dF, "FontType", font);
    add_copy_def(output, dF, "FontMatrix", font, "readonly def");
    add_number_def(output, dF, "StrokeWidth", font);
    add_number_def(output, dF, "UniqueID", font);
    add_copy_def(output, dF, "XUID", font, "readonly def");
    add_copy_def(output, dF, "FontBBox", font, "readonly def");
    output->skeleton_fontdict_end();

    // Private dictionary
    add_copy_def(output, dP, "BlueValues", font);
    add_copy_def(output, dP, "OtherBlues", font);
    add_copy_def(output, dP, "FamilyBlues", font);
    add_copy_def(output, dP, "FamilyOtherBlues", font);
    add_number_def(output, dP, "BlueScale", font);
    add_number_def(output, dP, "BlueShift", font);
    add_number_def(output, dP, "BlueFuzz", font);
    add_copy_def(output, dP, "StdHW", font);
    add_copy_def(output, dP, "StdVW", font);
    add_copy_def(output, dP, "StemSnapH", font);
    add_copy_def(output, dP, "StemSnapV", font);
    add_copy_def(output, dP, "ForceBold", font);
    add_number_def(output, dP, "LanguageGroup", font);
    add_number_def(output, dP, "ExpansionFactor", font);
    add_number_def(output, dP, "UniqueID", font);
    output->add_definition(dP, Type1Definition::make_literal("MinFeature", "{16 16}", "|-"));
    output->add_definition(dP, Type1Definition::make_literal("password", "5839", "def"));
    output->add_definition(dP, Type1Definition::make_literal("lenIV", "0", "def"));
    output->skeleton_private_end();

    return output;
}

}

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