/*
** Write a BYTE as a hexadecimal value as part of the sfnts array.
*/
void sfnts_pputBYTE(TTStreamWriter& stream, BYTE n)
{
static const char hexdigits[]="0123456789ABCDEF";
if (!in_string)
{
stream.put_char('<');
string_len=0;
line_len++;
in_string=TRUE;
}
stream.put_char( hexdigits[ n / 16 ] );
stream.put_char( hexdigits[ n % 16 ] );
string_len++;
line_len+=2;
if (line_len > 70)
{
stream.put_char('\n');
line_len=0;
}
} /* end of sfnts_pputBYTE() */
/*
** This is called whenever it is
** necessary to end a string in the sfnts array.
**
** (The array must be broken into strings which are
** no longer than 64K characters.)
*/
void sfnts_end_string(TTStreamWriter& stream)
{
if (in_string)
{
string_len=0; /* fool sfnts_pputBYTE() */
#ifdef DEBUG_TRUETYPE_INLINE
puts("\n% dummy byte:\n");
#endif
sfnts_pputBYTE(stream, 0); /* extra byte for pre-2013 compatibility */
stream.put_char('>');
line_len++;
}
in_string=FALSE;
} /* end of sfnts_end_string() */
/*
** This routine is used to break the character
** procedure up into a number of smaller
** procedures. This is necessary so as not to
** overflow the stack on certain level 1 interpreters.
**
** Prepare to push another item onto the stack,
** starting a new proceedure if necessary.
**
** Not all the stack depth calculations in this routine
** are perfectly accurate, but they do the job.
*/
void GlyphToType3::stack(TTStreamWriter& stream, int new_elem)
{
if ( !pdf_mode && num_pts > 25 ) /* Only do something of we will */
{
/* have a log of points. */
if (stack_depth == 0)
{
stream.put_char('{');
stack_depth=1;
}
stack_depth += new_elem; /* Account for what we propose to add */
if (stack_depth > 100)
{
stream.puts("}_e{");
stack_depth = 3 + new_elem; /* A rough estimate */
}
}
} /* end of stack() */
/*----------------------------------------------------------------
** Emmit the code to finish up the dictionary and turn
** it into a font.
----------------------------------------------------------------*/
void ttfont_trailer(TTStreamWriter& stream, struct TTFONT *font)
{
/* If we are generating a type 3 font, we need to provide */
/* a BuildGlyph and BuildChar proceedures. */
if (font->target_type == PS_TYPE_3 ||
font->target_type == PS_TYPE_42_3_HYBRID)
{
stream.put_char('\n');
stream.putline("/BuildGlyph");
stream.putline(" {exch begin"); /* start font dictionary */
stream.putline(" CharStrings exch");
stream.putline(" 2 copy known not{pop /.notdef}if");
stream.putline(" true 3 1 roll get exec");
stream.putline(" end}_d");
stream.put_char('\n');
/* This proceedure is for compatiblity with */
/* level 1 interpreters. */
stream.putline("/BuildChar {");
stream.putline(" 1 index /Encoding get exch get");
stream.putline(" 1 index /BuildGlyph get exec");
stream.putline("}_d");
stream.put_char('\n');
}
/* If we are generating a type 42 font, we need to check to see */
/* if this PostScript interpreter understands type 42 fonts. If */
/* it doesn't, we will hope that the Apple TrueType rasterizer */
/* has been loaded and we will adjust the font accordingly. */
/* I found out how to do this by examining a TrueType font */
/* generated by a Macintosh. That is where the TrueType interpreter */
/* setup instructions and part of BuildGlyph came from. */
if (font->target_type == PS_TYPE_42 ||
font->target_type == PS_TYPE_42_3_HYBRID)
{
stream.put_char('\n');
/* If we have no "resourcestatus" command, or FontType 42 */
/* is unknown, leave "true" on the stack. */
stream.putline("systemdict/resourcestatus known");
stream.putline(" {42 /FontType resourcestatus");
stream.putline(" {pop pop false}{true}ifelse}");
stream.putline(" {true}ifelse");
/* If true, execute code to produce an error message if */
/* we can't find Apple's TrueDict in VM. */
stream.putline("{/TrueDict where{pop}{(%%[ Error: no TrueType rasterizer ]%%)= flush}ifelse");
/* Since we are expected to use Apple's TrueDict TrueType */
/* reasterizer, change the font type to 3. */
stream.putline("/FontType 3 def");
/* Define a string to hold the state of the Apple */
/* TrueType interpreter. */
stream.putline(" /TrueState 271 string def");
/* It looks like we get information about the resolution */
/* of the printer and store it in the TrueState string. */
stream.putline(" TrueDict begin sfnts save");
stream.putline(" 72 0 matrix defaultmatrix dtransform dup");
stream.putline(" mul exch dup mul add sqrt cvi 0 72 matrix");
stream.putline(" defaultmatrix dtransform dup mul exch dup");
stream.putline(" mul add sqrt cvi 3 -1 roll restore");
stream.putline(" TrueState initer end");
/* This BuildGlyph procedure will look the name up in the */
/* CharStrings array, and then check to see if what it gets */
/* is a procedure. If it is, it executes it, otherwise, it */
/* lets the TrueType rasterizer loose on it. */
/* When this proceedure is executed the stack contains */
/* the font dictionary and the character name. We */
/* exchange arguments and move the dictionary to the */
/* dictionary stack. */
stream.putline(" /BuildGlyph{exch begin");
/* stack: charname */
/* Put two copies of CharStrings on the stack and consume */
/* one testing to see if the charname is defined in it, */
/* leave the answer on the stack. */
stream.putline(" CharStrings dup 2 index known");
/* stack: charname CharStrings bool */
/* Exchange the CharStrings dictionary and the charname, */
/* but if the answer was false, replace the character name */
/* with ".notdef". */
stream.putline(" {exch}{exch pop /.notdef}ifelse");
/* stack: CharStrings charname */
/* Get the value from the CharStrings dictionary and see */
/* if it is executable. */
stream.putline(" get dup xcheck");
/* stack: CharStrings_entry */
/* If is a proceedure. Execute according to RBIIp 277-278. */
stream.putline(" {currentdict systemdict begin begin exec end end}");
/* Is a TrueType character index, let the rasterizer at it. */
stream.putline(" {TrueDict begin /bander load cvlit exch TrueState render end}");
stream.putline(" ifelse");
/* Pop the font's dictionary off the stack. */
stream.putline(" end}bind def");
/* This is the level 1 compatibility BuildChar procedure. */
/* See RBIIp 281. */
stream.putline(" /BuildChar{");
stream.putline(" 1 index /Encoding get exch get");
stream.putline(" 1 index /BuildGlyph get exec");
stream.putline(" }bind def");
/* Here we close the condition which is true */
/* if the printer has no built-in TrueType */
/* rasterizer. */
stream.putline("}if");
stream.put_char('\n');
} /* end of if Type 42 not understood. */
stream.putline("FontName currentdict end definefont pop");
/* stream.putline("%%EOF"); */
} /* end of ttfont_trailer() */
