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- /* Copyright (C) 1999, 2000 Aladdin Enterprises. All rights reserved.
-
- This file is part of AFPL Ghostscript.
-
- AFPL Ghostscript is distributed with NO WARRANTY OF ANY KIND. No author or
- distributor accepts any responsibility for the consequences of using it, or
- for whether it serves any particular purpose or works at all, unless he or
- she says so in writing. Refer to the Aladdin Free Public License (the
- "License") for full details.
-
- Every copy of AFPL Ghostscript must include a copy of the License, normally
- in a plain ASCII text file named PUBLIC. The License grants you the right
- to copy, modify and redistribute AFPL Ghostscript, but only under certain
- conditions described in the License. Among other things, the License
- requires that the copyright notice and this notice be preserved on all
- copies.
- */
-
- /*$Id: gdevpsft.c,v 1.4 2000/09/26 06:42:05 lpd Exp $ */
- /* Write an embedded TrueType font */
- #include "memory_.h"
- #include <stdlib.h> /* for qsort */
- #include "gx.h"
- #include "gserrors.h"
- #include "gsmatrix.h"
- #include "gsutil.h"
- #include "gxfcid.h"
- #include "gxfont.h"
- #include "gxfont42.h"
- #include "gxttf.h"
- #include "stream.h"
- #include "spprint.h"
- #include "gdevpsf.h"
-
- #define MAX_COMPOSITE_PIECES 3 /* adhoc */
-
- /* ---------------- Utilities ---------------- */
-
- #define ACCESS(base, length, vptr)\
- BEGIN\
- code = string_proc(pfont, (ulong)(base), length, &vptr);\
- if (code < 0) return code;\
- END
-
- /* Pad to a multiple of 4 bytes. */
- private void
- put_pad(stream *s, uint length)
- {
- static const byte pad_to_4[3] = {0, 0, 0};
-
- pwrite(s, pad_to_4, (uint)(-length & 3));
- }
-
- /* Put short and long values on a stream. */
- private void
- put_ushort(stream *s, uint v)
- {
- pputc(s, (byte)(v >> 8));
- pputc(s, (byte)v);
- }
- private void
- put_ulong(stream *s, ulong v)
- {
- put_ushort(s, (uint)(v >> 16));
- put_ushort(s, (uint)v);
- }
- private void
- put_loca(stream *s, ulong offset, int indexToLocFormat)
- {
- if (indexToLocFormat)
- put_ulong(s, offset);
- else
- put_ushort(s, (uint)(offset >> 1));
- }
-
- /* Get or put 2- or 4-byte quantities from/into a table. */
- #define U8(p) ((uint)((p)[0]))
- #define S8(p) (int)((U8(p) ^ 0x80) - 0x80)
- #define U16(p) (((uint)((p)[0]) << 8) + (p)[1])
- #define S16(p) (int)((U16(p) ^ 0x8000) - 0x8000)
- #define u32(p) get_u32_msb(p)
- private void
- put_u16(byte *p, uint v)
- {
- p[0] = (byte)(v >> 8);
- p[1] = (byte)v;
- }
- private void
- put_u32(byte *p, ulong v)
- {
- p[0] = (byte)(v >> 24);
- p[1] = (byte)(v >> 16);
- p[2] = (byte)(v >> 8);
- p[3] = (byte)v;
- }
- private ulong
- put_table(byte tab[16], const char *tname, ulong checksum, ulong offset,
- uint length)
- {
- memcpy(tab, (const byte *)tname, 4);
- put_u32(tab + 4, checksum);
- put_u32(tab + 8, offset + 0x40000000);
- put_u32(tab + 12, (ulong)length);
- return offset + round_up(length, 4);
- }
-
- /* Write one range of a TrueType font. */
- private int
- write_range(stream *s, gs_font_type42 *pfont, ulong start, uint length)
- {
- ulong base = start;
- ulong limit = base + length;
- int (*string_proc)(P4(gs_font_type42 *, ulong, uint, const byte **)) =
- pfont->data.string_proc;
-
- if_debug3('l', "[l]write_range pos = %ld, start = %lu, length = %u\n",
- stell(s), start, length);
- while (base < limit) {
- uint size = limit - base;
- const byte *ptr;
- int code;
-
- /* Write the largest block we can access consecutively. */
- while ((code = string_proc(pfont, base, size, &ptr)) < 0) {
- if (size <= 1)
- return code;
- size >>= 1;
- }
- pwrite(s, ptr, size);
- base += size;
- }
- return 0;
- }
-
- /*
- * Determine the Macintosh glyph number for a given character, if any.
- * If no glyph can be found, return -1 and store the name in *pstr.
- */
- private int
- mac_glyph_index(gs_font *font, int ch, gs_const_string *pstr)
- {
- gs_glyph glyph = font->procs.encode_char(font, (gs_char)ch,
- GLYPH_SPACE_NAME);
-
- if (glyph == gs_no_glyph)
- return 0; /* .notdef */
- pstr->data = (const byte *)
- font->procs.callbacks.glyph_name(glyph, &pstr->size);
- if (glyph < gs_min_cid_glyph) {
- gs_char mac_char;
- gs_glyph mac_glyph;
- gs_const_string mstr;
-
- /* Look (not very hard) for a match in the Mac glyph space. */
- if (ch >= 32 && ch <= 126)
- mac_char = ch - 29;
- else if (ch >= 128 && ch <= 255)
- mac_char = ch - 30;
- else
- return -1;
- mac_glyph =
- font->procs.callbacks.known_encode(mac_char,
- ENCODING_INDEX_MACGLYPH);
- if (mac_glyph == gs_no_glyph)
- return -1;
- mstr.data =(const byte *)
- font->procs.callbacks.glyph_name(mac_glyph, &mstr.size);
- if (!bytes_compare(pstr->data, pstr->size, mstr.data, mstr.size))
- return (int)mac_char;
- }
- return -1;
- }
-
- /* ---------------- Individual tables ---------------- */
-
- /* ------ cmap ------ */
-
- /* Write a generated cmap table. */
- static const byte cmap_initial_0[] = {
- 0, 0, /* table version # = 0 */
- 0, 2, /* # of encoding tables = 2 */
-
- /* First table, Macintosh */
- 0, 1, /* platform ID = Macintosh */
- 0, 0, /* platform encoding ID = ??? */
- 0, 0, 0, 4+8+8, /* offset to table start */
- /* Second table, Windows */
- 0, 3, /* platform ID = Microsoft */
- 0, 0, /* platform encoding ID = unknown */
- 0, 0, 1, 4+8+8+6, /* offset to table start */
-
- /* Start of Macintosh format 0 table */
- 0, 0, /* format = 0, byte encoding table */
- 1, 6, /* length */
- 0, 0 /* version number */
- };
- static const byte cmap_initial_6[] = {
- 0, 0, /* table version # = 0 */
- 0, 2, /* # of encoding tables = 2 */
-
- /* First table, Macintosh */
- 0, 1, /* platform ID = Macintosh */
- 0, 0, /* platform encoding ID = ??? */
- 0, 0, 0, 4+8+8, /* offset to table start */
- /* Second table, Windows */
- 0, 3, /* platform ID = Microsoft */
- 0, 0, /* platform encoding ID = unknown */
- 0, 0, 0, 4+8+8+10, /* offset to table start */
- /****** VARIABLE, add 2 x # of entries ******/
-
- /* Start of Macintosh format 6 table */
- 0, 6, /* format = 6, trimmed table mapping */
- 0, 10, /* length ****** VARIABLE, add 2 x # of entries ******/
- 0, 0, /* version number */
- 0, 0, /* first character code */
- 0, 0 /* # of entries ****** VARIABLE ****** */
- };
- static const byte cmap_initial_4[] = {
- 0, 0, /* table version # = 0 */
- 0, 1, /* # of encoding tables = 2 */
-
- /* Single table, Windows */
- 0, 3, /* platform ID = Microsoft */
- 0, 0, /* platform encoding ID = unknown */
- 0, 0, 0, 4+8 /* offset to table start */
- };
- static const byte cmap_sub_initial[] = {
- 0, 4, /* format = 4, segment mapping */
- 0, 32, /* length ** VARIABLE, add 2 x # of glyphs ** */
- 0, 0, /* version # */
- 0, 4, /* 2 x segCount */
- 0, 4, /* searchRange = 2 x 2 ^ floor(log2(segCount)) */
- 0, 1, /* floor(log2(segCount)) */
- 0, 0, /* 2 x segCount - searchRange */
-
- 0, 0, /* endCount[0] **VARIABLE** */
- 255, 255, /* endCount[1] */
- 0, 0, /* reservedPad */
- 0, 0, /* startCount[0] **VARIABLE** */
- 255, 255, /* startCount[1] */
- 0, 0, /* idDelta[0] */
- 0, 1, /* idDelta[1] */
- 0, 4, /* idRangeOffset[0] */
- 0, 0 /* idRangeOffset[1] */
- };
- private void
- write_cmap(stream *s, gs_font *font, uint first_code, int num_glyphs,
- gs_glyph max_glyph, int options, uint cmap_length)
- {
- byte cmap_sub[sizeof(cmap_sub_initial)];
- byte entries[256 * 2];
- int first_entry = 0, end_entry = num_glyphs;
- bool can_use_trimmed = !(options & WRITE_TRUETYPE_NO_TRIMMED_TABLE);
- uint merge = 0;
- uint num_entries;
- int i;
-
- /* Collect the table entries. */
-
- for (i = 0; i < num_glyphs; ++i) {
- gs_glyph glyph =
- font->procs.encode_char(font, (gs_char)i, GLYPH_SPACE_INDEX);
- uint glyph_index;
-
- if (glyph == gs_no_glyph || glyph < gs_min_cid_glyph ||
- glyph > max_glyph
- )
- glyph = gs_min_cid_glyph;
- glyph_index = (uint)(glyph - gs_min_cid_glyph);
- merge |= glyph_index;
- put_u16(entries + 2 * i, glyph_index);
- }
- while (end_entry > first_entry && !U16(entries + 2 * end_entry - 2))
- --end_entry;
- while (first_entry < end_entry && !U16(entries + 2 * first_entry))
- ++first_entry;
- num_entries = end_entry - first_entry;
-
- /* Write the table header and Macintosh sub-table (if any). */
- if (merge == (byte)merge && (num_entries <= 127 || !can_use_trimmed)) {
- /* Use byte encoding format. */
- memset(entries + 2 * num_glyphs, 0,
- sizeof(entries) - 2 * num_glyphs);
- pwrite(s, cmap_initial_0, sizeof(cmap_initial_0));
- for (i = 0; i <= 0xff; ++i)
- sputc(s, (byte)entries[2 * i + 1]);
- } else if (can_use_trimmed) {
- /* Use trimmed table format. */
- byte cmap_data[sizeof(cmap_initial_6)];
-
- memcpy(cmap_data, cmap_initial_6, sizeof(cmap_initial_6));
- put_u16(cmap_data + 18,
- U16(cmap_data + 18) + num_entries * 2); /* offset */
- put_u16(cmap_data + 22,
- U16(cmap_data + 22) + num_entries * 2); /* length */
- put_u16(cmap_data + 26, first_code + first_entry);
- put_u16(cmap_data + 28, num_entries);
- pwrite(s, cmap_data, sizeof(cmap_data));
- pwrite(s, entries + first_entry * 2, num_entries * 2);
- } else {
- /*
- * Punt. Acrobat Reader 3 can't handle any other Mac table format.
- * (AR3 for Linux doesn't seem to be able to handle Windows format,
- * either, but maybe AR3 for Windows can.)
- */
- pwrite(s, cmap_initial_4, sizeof(cmap_initial_4));
- }
-
- /* Write the Windows sub-table. */
-
- memcpy(cmap_sub, cmap_sub_initial, sizeof(cmap_sub_initial));
- put_u16(cmap_sub + 2, U16(cmap_sub + 2) + num_entries * 2); /* length */
- put_u16(cmap_sub + 14, first_code + end_entry - 1); /* endCount[0] */
- put_u16(cmap_sub + 20, first_code + first_entry); /* startCount[0] */
- pwrite(s, cmap_sub, sizeof(cmap_sub));
- pwrite(s, entries + first_entry * 2, num_entries * 2);
- put_pad(s, cmap_length);
- }
- private uint
- size_cmap(gs_font *font, uint first_code, int num_glyphs, gs_glyph max_glyph,
- int options)
- {
- stream poss;
-
- swrite_position_only(&poss);
- write_cmap(&poss, font, first_code, num_glyphs, max_glyph, options, 0);
- return stell(&poss);
- }
-
- /* ------ name ------ */
-
- /* Write a generated name table. */
- static const byte name_initial[] = {
- 0, 0, /* format */
- 0, 1, /* # of records = 1 */
- 0, 18, /* start of string storage */
-
- 0, 2, /* platform ID = ISO */
- 0, 2, /* encoding ID = ISO 8859-1 */
- 0, 0, /* language ID (none) */
- 0, 6, /* name ID = PostScript name */
- 0, 0, /* length ****** VARIABLE ****** */
- 0, 0 /* start of string within string storage */
- };
- private uint
- size_name(const gs_const_string *font_name)
- {
- return sizeof(name_initial) + font_name->size;
- }
- private void
- write_name(stream *s, const gs_const_string *font_name)
- {
- byte name_bytes[sizeof(name_initial)];
-
- memcpy(name_bytes, name_initial, sizeof(name_initial));
- put_u16(name_bytes + 14, font_name->size);
- pwrite(s, name_bytes, sizeof(name_bytes));
- pwrite(s, font_name->data, font_name->size);
- put_pad(s, size_name(font_name));
- }
-
- /* ------ OS/2 ------ */
-
- /* Write a generated OS/2 table. */
- #define OS_2_LENGTH sizeof(ttf_OS_2_t)
- private void
- update_OS_2(ttf_OS_2_t *pos2, uint first_glyph, int num_glyphs)
- {
- put_u16(pos2->usFirstCharIndex, first_glyph);
- put_u16(pos2->usLastCharIndex, first_glyph + num_glyphs - 1);
- }
- private void
- write_OS_2(stream *s, gs_font *font, uint first_glyph, int num_glyphs)
- {
- ttf_OS_2_t os2;
-
- /*
- * We don't bother to set most of the fields. The really important
- * ones, which affect character mapping, are usFirst/LastCharIndex.
- * We also need to set usWeightClass and usWidthClass to avoid
- * crashing ttfdump.
- */
- memset(&os2, 0, sizeof(os2));
- put_u16(os2.version, 1);
- put_u16(os2.usWeightClass, 400); /* Normal */
- put_u16(os2.usWidthClass, 5); /* Normal */
- update_OS_2(&os2, first_glyph, num_glyphs);
- if (first_glyph >= 0xf000)
- os2.ulCodePageRanges[3] = 1; /* bit 31, symbolic */
- pwrite(s, &os2, sizeof(os2));
- put_pad(s, sizeof(os2));
- }
-
- /* ------ post ------ */
-
- /* Construct and then write the post table. */
- typedef struct post_glyph_s {
- byte char_index;
- byte size;
- ushort glyph_index;
- } post_glyph_t;
- private int
- compare_post_glyphs(const void *pg1, const void *pg2)
- {
- gs_glyph g1 = ((const post_glyph_t *)pg1)->glyph_index,
- g2 = ((const post_glyph_t *)pg2)->glyph_index;
-
- return (g1 < g2 ? -1 : g1 > g2 ? 1 : 0);
- }
- typedef struct post_s {
- post_glyph_t glyphs[256 + 1];
- int count, glyph_count;
- uint length;
- } post_t;
-
- /*
- * If necessary, compute the length of the post table. Note that we
- * only generate post entries for characters in the Encoding.
- */
- private void
- compute_post(gs_font *font, post_t *post)
- {
- int i;
-
- for (i = 0, post->length = 32 + 2; i <= 255; ++i) {
- gs_const_string str;
- gs_glyph glyph = font->procs.encode_char(font, (gs_char)i,
- GLYPH_SPACE_INDEX);
- int mac_index = mac_glyph_index(font, i, &str);
-
- if (mac_index != 0) {
- post->glyphs[post->count].char_index = i;
- post->glyphs[post->count].size =
- (mac_index < 0 ? str.size + 1 : 0);
- post->glyphs[post->count].glyph_index = glyph - gs_min_cid_glyph;
- post->count++;
- }
- }
- if (post->count) {
- int j;
-
- qsort(post->glyphs, post->count, sizeof(post->glyphs[0]),
- compare_post_glyphs);
- /* Eliminate duplicate references to the same glyph. */
- for (i = j = 0; i < post->count; ++i) {
- if (i == 0 ||
- post->glyphs[i].glyph_index !=
- post->glyphs[i - 1].glyph_index
- ) {
- post->length += post->glyphs[i].size;
- post->glyphs[j++] = post->glyphs[i];
- }
- }
- post->count = j;
- post->glyph_count = post->glyphs[post->count - 1].glyph_index + 1;
- }
- post->length += post->glyph_count * 2;
- }
-
- /* Write the post table */
- private void
- write_post(stream *s, gs_font *font, post_t *post)
- {
- byte post_initial[32 + 2];
- uint name_index;
- uint glyph_index;
- int i;
-
- memset(post_initial, 0, 32);
- put_u32(post_initial, 0x00020000);
- put_u16(post_initial + 32, post->glyph_count);
- pwrite(s, post_initial, sizeof(post_initial));
-
- /* Write the name index table. */
-
- for (i = 0, name_index = 258, glyph_index = 0; i < post->count; ++i) {
- gs_const_string str;
- int ch = post->glyphs[i].char_index;
- int mac_index = mac_glyph_index(font, ch, &str);
-
- for (; glyph_index < post->glyphs[i].glyph_index; ++glyph_index)
- put_ushort(s, 0);
- glyph_index++;
- if (mac_index >= 0)
- put_ushort(s, mac_index);
- else {
- put_ushort(s, name_index);
- name_index++;
- }
- }
-
- /* Write the string names of the glyphs. */
-
- for (i = 0; i < post->count; ++i) {
- gs_const_string str;
- int ch = post->glyphs[i].char_index;
- int mac_index = mac_glyph_index(font, ch, &str);
-
- if (mac_index < 0) {
- spputc(s, str.size);
- pwrite(s, str.data, str.size);
- }
- }
- put_pad(s, post->length);
- }
-
- /* ---------------- Main program ---------------- */
-
- /* Write the definition of a TrueType font. */
- private int
- compare_table_tags(const void *pt1, const void *pt2)
- {
- ulong t1 = u32(pt1), t2 = u32(pt2);
-
- return (t1 < t2 ? -1 : t1 > t2 ? 1 : 0);
- }
- private int
- psf_write_truetype_data(stream *s, gs_font_type42 *pfont, int options,
- psf_glyph_enum_t *penum, bool is_subset,
- const gs_const_string *alt_font_name)
- {
- gs_font *const font = (gs_font *)pfont;
- gs_const_string font_name;
- int (*string_proc)(P4(gs_font_type42 *, ulong, uint, const byte **)) =
- pfont->data.string_proc;
- const byte *OffsetTable;
- uint numTables_stored, numTables, numTables_out;
- #define MAX_NUM_TABLES 40
- byte tables[MAX_NUM_TABLES * 16];
- uint i;
- ulong offset;
- gs_glyph glyph, glyph_prev;
- ulong max_glyph;
- uint glyf_length, glyf_checksum = 0 /****** BOGUS ******/;
- uint loca_length, loca_checksum[2];
- uint numGlyphs; /* original value from maxp */
- byte head[56]; /* 0 mod 4 */
- post_t post;
- ulong head_checksum, file_checksum = 0;
- int indexToLocFormat;
- bool have_cmap = false,
- have_name = !(options & WRITE_TRUETYPE_NAME),
- have_OS_2 = false,
- have_post = false;
- uint cmap_length;
- ulong OS_2_start;
- uint OS_2_length = OS_2_LENGTH;
- int code;
-
- if (alt_font_name)
- font_name = *alt_font_name;
- else
- font_name.data = font->font_name.chars,
- font_name.size = font->font_name.size;
-
- /*
- * Count the number of tables, including the eventual glyf and loca
- * (which may not actually be present in the font), and copy the
- * table directory.
- */
-
- ACCESS(0, 12, OffsetTable);
- numTables_stored = U16(OffsetTable + 4);
- for (i = numTables = 0; i < numTables_stored; ++i) {
- const byte *tab;
- const byte *data;
- ulong start;
- uint length;
-
- ACCESS(12 + i * 16, 16, tab);
- start = u32(tab + 8);
- length = u32(tab + 12);
- if (!memcmp(tab, "head", 4)) {
- if (length != 54)
- return_error(gs_error_invalidfont);
- ACCESS(start, length, data);
- memcpy(head, data, length);
- } else if (
- !memcmp(tab, "gly", 3) /*glyf=synthesized, glyx=Adobe bogus*/ ||
- !memcmp(tab, "loc", 3) /*loca=synthesized, locx=Adobe bogus*/ ||
- !memcmp(tab, "gdir", 4) /*Adobe marker*/ ||
- ((options & WRITE_TRUETYPE_CMAP) && !memcmp(tab, "cmap", 4))
- )
- DO_NOTHING;
- else {
- if (numTables == MAX_NUM_TABLES)
- return_error(gs_error_limitcheck);
- if (!memcmp(tab, "cmap", 4))
- have_cmap = true;
- else if (!memcmp(tab, "maxp", 4)) {
- ACCESS(start, length, data);
- numGlyphs = U16(data + 4);
- } else if (!memcmp(tab, "name", 4))
- have_name = true;
- else if (!memcmp(tab, "OS/2", 4)) {
- have_OS_2 = true;
- if (length > OS_2_LENGTH)
- return_error(gs_error_invalidfont);
- OS_2_start = start;
- OS_2_length = length;
- continue;
- } else if (!memcmp(tab, "post", 4))
- have_post = true;
- memcpy(&tables[numTables++ * 16], tab, 16);
- }
- }
-
- /*
- * Enumerate the glyphs to get the size of glyf and loca,
- * and to compute the checksums for these tables.
- */
-
- /****** NO CHECKSUMS YET ******/
- for (max_glyph = 0, glyf_length = 0;
- (code = psf_enumerate_glyphs_next(penum, &glyph)) != 1;
- ) {
- uint glyph_index;
- gs_const_string glyph_string;
-
- if (glyph < gs_min_cid_glyph)
- return_error(gs_error_invalidfont);
- glyph_index = glyph - gs_min_cid_glyph;
- if_debug1('L', "[L]glyph_index %u\n", glyph_index);
- if (pfont->data.get_outline(pfont, glyph_index, &glyph_string) >= 0) {
- max_glyph = max(max_glyph, glyph_index);
- glyf_length += glyph_string.size;
- if_debug1('L', "[L] size %u\n", glyph_string.size);
- }
- }
- if_debug2('l', "[l]max_glyph = %lu, glyf_length = %lu\n",
- (ulong)max_glyph, (ulong)glyf_length);
- /*
- * For subset fonts, we should trim the loca table so that it only
- * contains entries through max_glyph. Unfortunately, this would
- * require changing numGlyphs in maxp, which in turn would affect hdmx,
- * hhea, hmtx, vdmx, vhea, vmtx, and possibly other tables. This is way
- * more work than we want to do right now.
- */
- /*loca_length = (max_glyph + 2) << 2;*/
- loca_length = (numGlyphs + 1) << 2;
- indexToLocFormat = (glyf_length > 0x1fffc);
- if (!indexToLocFormat)
- loca_length >>= 1;
-
- /*
- * If necessary, compute the length of the post table. Note that we
- * only generate post entries for characters in the Encoding. */
-
- if (!have_post) {
- memset(&post, 0, sizeof(post));
- if (options & WRITE_TRUETYPE_POST)
- compute_post(font, &post);
- else
- post.length = 32; /* dummy table */
- }
-
- /* Fix up the head table. */
-
- memset(head + 8, 0, 4);
- head[51] = (byte)indexToLocFormat;
- memset(head + 54, 0, 2);
- for (head_checksum = 0, i = 0; i < 56; i += 4)
- head_checksum += u32(&head[i]);
-
- /*
- * Construct the table directory, except for glyf, loca, head, OS/2,
- * and, if necessary, generated cmap, name, and post tables.
- * Note that the existing directory is already sorted by tag.
- */
-
- numTables_out = numTables + 4 +
- !have_cmap + !have_name + !have_post;
- offset = 12 + numTables_out * 16;
- for (i = 0; i < numTables; ++i) {
- byte *tab = &tables[i * 16];
- ulong length = u32(tab + 12);
-
- offset += round_up(length, 4);
- }
-
- /* Make the table directory entries for generated tables. */
-
- {
- byte *tab = &tables[numTables * 16];
-
- offset = put_table(tab, "glyf", glyf_checksum, offset, glyf_length);
- tab += 16;
-
- offset = put_table(tab, "loca", loca_checksum[indexToLocFormat],
- offset, loca_length);
- tab += 16;
-
- if (!have_cmap) {
- cmap_length = size_cmap(font, 0xf000, 256,
- gs_min_cid_glyph + max_glyph, options);
- offset = put_table(tab, "cmap", 0L /****** NO CHECKSUM ******/,
- offset, cmap_length);
- tab += 16;
- }
-
- if (!have_name) {
- offset = put_table(tab, "name", 0L /****** NO CHECKSUM ******/,
- offset, size_name(&font_name));
- tab += 16;
- }
-
- offset = put_table(tab, "OS/2", 0L /****** NO CHECKSUM ******/,
- offset, OS_2_length);
- tab += 16;
-
- if (!have_post) {
- offset = put_table(tab, "post", 0L /****** NO CHECKSUM ******/,
- offset, post.length);
- tab += 16;
- }
-
- /*
- * Note that the 'head' table must have length 54, even though
- * it occupies 56 bytes on the file.
- */
- offset = put_table(tab, "head", head_checksum, offset, 54);
- tab += 16;
- }
- numTables = numTables_out;
-
- /* Write the font header. */
-
- {
- static const byte version[4] = {0, 1, 0, 0};
-
- pwrite(s, version, 4);
- }
- put_ushort(s, numTables);
- for (i = 0; 1 << i <= numTables; ++i)
- DO_NOTHING;
- --i;
- put_ushort(s, 16 << i); /* searchRange */
- put_ushort(s, i); /* entrySelectors */
- put_ushort(s, numTables * 16 - (16 << i)); /* rangeShift */
-
- /* Write the table directory. */
-
- qsort(tables, numTables, 16, compare_table_tags);
- offset = 12 + numTables * 16;
- for (i = 0; i < numTables; ++i) {
- const byte *tab = &tables[i * 16];
- byte entry[16];
-
- memcpy(entry, tab, 16);
- if (entry[8] < 0x40) {
- /* Not a generated table. */
- uint length = u32(tab + 12);
-
- put_u32(entry + 8, offset);
- offset += round_up(length, 4);
- } else {
- entry[8] -= 0x40;
- }
- pwrite(s, entry, 16);
- }
-
- /* Write tables other than the ones we generate here. */
-
- for (i = 0; i < numTables; ++i) {
- const byte *tab = &tables[i * 16];
-
- if (tab[8] < 0x40) {
- ulong start = u32(tab + 8);
- uint length = u32(tab + 12);
-
- write_range(s, pfont, start, length);
- put_pad(s, length);
- }
- }
-
- /* Write glyf. */
-
- if (is_subset)
- psf_enumerate_glyphs_reset(penum);
- else
- psf_enumerate_glyphs_begin(penum, font, NULL, max_glyph + 1,
- GLYPH_SPACE_INDEX);
- for (offset = 0; psf_enumerate_glyphs_next(penum, &glyph) != 1; ) {
- gs_const_string glyph_string;
-
- if (pfont->data.get_outline(pfont, glyph - gs_min_cid_glyph,
- &glyph_string) >= 0) {
- pwrite(s, glyph_string.data, glyph_string.size);
- offset += glyph_string.size;
- if_debug2('L', "[L]glyf index = %u, size = %u\n",
- i, glyph_string.size);
- }
- }
- if_debug1('l', "[l]glyf final offset = %lu\n", offset);
- put_pad(s, (uint)offset);
-
- /* Write loca. */
-
- psf_enumerate_glyphs_reset(penum);
- glyph_prev = gs_min_cid_glyph;
- for (offset = 0; psf_enumerate_glyphs_next(penum, &glyph) != 1; ) {
- gs_const_string glyph_string;
-
- for (; glyph_prev <= glyph; ++glyph_prev)
- put_loca(s, offset, indexToLocFormat);
- if (pfont->data.get_outline(pfont, glyph - gs_min_cid_glyph,
- &glyph_string) >= 0)
- offset += glyph_string.size;
- }
- /* Pad to numGlyphs + 1 entries (including the trailing entry). */
- for (; glyph_prev <= gs_min_cid_glyph + numGlyphs; ++glyph_prev)
- put_loca(s, offset, indexToLocFormat);
- put_pad(s, loca_length);
-
- /* If necessary, write cmap, name, and OS/2. */
-
- if (!have_cmap)
- write_cmap(s, font, 0xf000, 256, gs_min_cid_glyph + max_glyph,
- options, cmap_length);
- if (!have_name)
- write_name(s, &font_name);
- if (!have_OS_2)
- write_OS_2(s, font, 0xf000, 256);
- else if (!have_cmap) {
- /*
- * Adjust the first and last character indices in the OS/2 table
- * to reflect the values in the generated cmap.
- */
- const byte *pos2;
- ttf_OS_2_t os2;
-
- ACCESS(OS_2_start, OS_2_length, pos2);
- memcpy(&os2, pos2, min(OS_2_length, sizeof(os2)));
- update_OS_2(&os2, 0xf000, 256);
- pwrite(s, &os2, OS_2_length);
- put_pad(s, OS_2_length);
- } else {
- /* Just copy the existing OS/2 table. */
- write_range(s, pfont, OS_2_start, OS_2_length);
- put_pad(s, OS_2_length);
- }
-
- /* If necessary, write post. */
-
- if (!have_post) {
- if (options & WRITE_TRUETYPE_POST)
- write_post(s, font, &post);
- else {
- byte post_initial[32 + 2];
-
- memset(post_initial, 0, 32);
- put_u32(post_initial, 0x00030000);
- pwrite(s, post_initial, 32);
- }
- }
-
- /* Write head. */
-
- /****** CHECKSUM WAS NEVER COMPUTED ******/
- /*
- * The following nonsense is to avoid warnings about the constant
- * 0xb1b0afbaL being "unsigned in ANSI C, signed with -traditional".
- */
- #if ARCH_SIZEOF_LONG > ARCH_SIZEOF_INT
- # define HEAD_MAGIC 0xb1b0afbaL
- #else
- # define HEAD_MAGIC ((ulong)~0x4e4f5045)
- #endif
- put_u32(head + 8, HEAD_MAGIC - file_checksum); /* per spec */
- #undef HEAD_MAGIC
- pwrite(s, head, 56);
-
- return 0;
- }
-
- /* Write a TrueType font. */
- int
- psf_write_truetype_font(stream *s, gs_font_type42 *pfont, int options,
- gs_glyph *orig_subset_glyphs, uint orig_subset_size,
- const gs_const_string *alt_font_name)
- {
- gs_font *const font = (gs_font *)pfont;
- psf_glyph_enum_t genum;
- gs_glyph subset_data[256 * MAX_COMPOSITE_PIECES];
- gs_glyph *subset_glyphs = orig_subset_glyphs;
- uint subset_size = orig_subset_size;
-
- /* Sort the subset glyphs, if any. */
-
- if (subset_glyphs) {
- /* Add the component glyphs for composites. */
- int code;
-
- memcpy(subset_data, orig_subset_glyphs,
- sizeof(gs_glyph) * subset_size);
- subset_glyphs = subset_data;
- code = psf_add_subset_pieces(subset_glyphs, &subset_size,
- countof(subset_data),
- countof(subset_data),
- font);
- if (code < 0)
- return code;
- subset_size = psf_sort_glyphs(subset_glyphs, subset_size);
- }
- psf_enumerate_glyphs_begin(&genum, font, subset_glyphs,
- (subset_glyphs ? subset_size : 0),
- GLYPH_SPACE_INDEX);
- return psf_write_truetype_data(s, pfont, options, &genum,
- subset_glyphs != 0, alt_font_name);
- }
-
- /* Write a CIDFontType 2 font. */
- int
- psf_write_cid2_font(stream *s, gs_font_cid2 *pfont, int options,
- const byte *subset_bits, uint subset_size,
- const gs_const_string *alt_font_name)
- {
- gs_font *const font = (gs_font *)pfont;
- psf_glyph_enum_t genum;
-
- psf_enumerate_bits_begin(&genum, font, subset_bits,
- (subset_bits ? subset_size : 0),
- GLYPH_SPACE_INDEX);
- return psf_write_truetype_data(s, (gs_font_type42 *)font, options, &genum,
- subset_bits != 0, alt_font_name);
- }
-