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texmacs  1.0.7.15
Functions
tt_table.c File Reference
#include <stdio.h>
#include "system.h"
#include "error.h"
#include "mem.h"
#include "mfileio.h"
#include "sfnt.h"
#include "tt_table.h"

Go to the source code of this file.

Functions

char * tt_pack_head_table (struct tt_head_table *table)
struct tt_head_tablett_read_head_table (sfnt *sfont)
char * tt_pack_maxp_table (struct tt_maxp_table *table)
struct tt_maxp_tablett_read_maxp_table (sfnt *sfont)
char * tt_pack_hhea_table (struct tt_hhea_table *table)
struct tt_hhea_tablett_read_hhea_table (sfnt *sfont)
struct tt_vhea_tablett_read_vhea_table (sfnt *sfont)
struct tt_VORG_tablett_read_VORG_table (sfnt *sfont)
struct tt_longMetricstt_read_longMetrics (sfnt *sfont, USHORT numGlyphs, USHORT numLongMetrics, USHORT numExSideBearings)
struct tt_os2__tablett_read_os2__table (sfnt *sfont)
USHORT tt_get_name (sfnt *sfont, char *dest, USHORT destlen, USHORT plat_id, USHORT enco_id, USHORT lang_id, USHORT name_id)
USHORT tt_get_ps_fontname (sfnt *sfont, char *dest, USHORT destlen)

Function Documentation

USHORT tt_get_name ( sfnt sfont,
char *  dest,
USHORT  destlen,
USHORT  plat_id,
USHORT  enco_id,
USHORT  lang_id,
USHORT  name_id 
)

Definition at line 420 of file tt_table.c.

{
  USHORT length = 0;
  USHORT num_names, string_offset;
  ULONG  name_offset;
  int    i;

  name_offset = sfnt_locate_table (sfont, "name");

  if (sfnt_get_ushort(sfont)) 
    ERROR ("Expecting zero");

  num_names = sfnt_get_ushort(sfont);
  string_offset = sfnt_get_ushort(sfont);
  for (i=0;i<num_names;i++) {
    USHORT p_id, e_id, n_id, l_id;
    USHORT offset;

    p_id = sfnt_get_ushort(sfont);
    e_id = sfnt_get_ushort(sfont);
    l_id = sfnt_get_ushort(sfont);
    n_id = sfnt_get_ushort(sfont);
    length = sfnt_get_ushort(sfont);
    offset = sfnt_get_ushort(sfont);
    /* language ID value 0xffffu for `accept any language ID' */
    if ((p_id == plat_id) && (e_id == enco_id) &&
       (lang_id == 0xffffu || l_id == lang_id) && (n_id == name_id)) {
      if (length > destlen - 1) {
       fprintf(stderr, "\n** Notice: Name string too long. Truncating **\n");
       length = destlen - 1;
      }
      sfnt_seek_set (sfont, name_offset+string_offset+offset);
      sfnt_read(dest, length, sfont);
      dest[length] = '\0';
      break;
    }
  }
  if (i == num_names) {
    length = 0;
  }

  return length;
}

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USHORT tt_get_ps_fontname ( sfnt sfont,
char *  dest,
USHORT  destlen 
)

Definition at line 467 of file tt_table.c.

{
  USHORT namelen = 0;

  /* First try Mac-Roman PS name and then Win-Unicode PS name */
  if ((namelen = tt_get_name(sfont, dest, destlen, 1, 0, 0, 6)) != 0 ||
      (namelen = tt_get_name(sfont, dest, destlen, 3, 1, 0x409u, 6)) != 0 ||
      (namelen = tt_get_name(sfont, dest, destlen, 3, 5, 0x412u, 6)) != 0)
    return namelen;

  fprintf(stderr, "\n** Warning: No valid PostScript name available **\n");
  /*
    Wrokaround for some bad TTfonts:
    Language ID value 0xffffu for `accept any language ID'
  */
  if ((namelen = tt_get_name(sfont, dest, destlen, 1, 0, 0xffffu, 6)) == 0) {
    /*
      Finally falling back to Mac Roman name field.
      Warning: Some bad Japanese TTfonts using SJIS encoded string in the
      Mac Roman name field. 
    */
    namelen = tt_get_name(sfont, dest, destlen, 1, 0, 0, 1);
  }

  return namelen;
}

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char* tt_pack_head_table ( struct tt_head_table table)

Definition at line 41 of file tt_table.c.

{
  int i;
  char *p, *data;

  if (table == NULL)
    ERROR("passed NULL pointer\n");

  p = data = NEW(TT_HEAD_TABLE_SIZE, char);
  p += sfnt_put_ulong(p, table->version);
  p += sfnt_put_ulong(p, table->fontRevision);
  p += sfnt_put_ulong(p, table->checkSumAdjustment);
  p += sfnt_put_ulong(p, table->magicNumber);
  p += sfnt_put_ushort(p, table->flags);
  p += sfnt_put_ushort(p, table->unitsPerEm);
  for (i=0; i<8; i++) {
    *(p++) = (table->created)[i];
  }
  for (i=0; i<8; i++) {
    *(p++) = (table->modified)[i];
  }
  p += sfnt_put_short(p, table->xMin);
  p += sfnt_put_short(p, table->yMin);
  p += sfnt_put_short(p, table->xMax);
  p += sfnt_put_short(p, table->yMax);
  p += sfnt_put_ushort(p, table->macStyle);
  p += sfnt_put_ushort(p, table->lowestRecPPEM);
  p += sfnt_put_short(p, table->fontDirectionHint);
  p += sfnt_put_short(p, table->indexToLocFormat);
  p += sfnt_put_short(p, table->glyphDataFormat);

  return data;
}

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char* tt_pack_hhea_table ( struct tt_hhea_table table)

Definition at line 158 of file tt_table.c.

{
  int   i;
  char *p, *data;

  p  = data = NEW(TT_HHEA_TABLE_SIZE, char);
  p += sfnt_put_ulong(p, table->version);
  p += sfnt_put_short(p, table->ascent);
  p += sfnt_put_short(p, table->descent);
  p += sfnt_put_short(p, table->lineGap);
  p += sfnt_put_ushort(p, table->advanceWidthMax);
  p += sfnt_put_short(p, table->minLeftSideBearing);
  p += sfnt_put_short(p, table->minRightSideBearing);
  p += sfnt_put_short(p, table->xMaxExtent);
  p += sfnt_put_short(p, table->caretSlopeRise);
  p += sfnt_put_short(p, table->caretSlopeRun);
  p += sfnt_put_short(p, table->caretOffset);
  for (i = 0; i < 4; i++) {
    p += sfnt_put_short(p, table->reserved[i]);
  }
  p += sfnt_put_short(p, table->metricDataFormat);
  p += sfnt_put_ushort(p, table->numOfLongHorMetrics);

  return data;
}

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char* tt_pack_maxp_table ( struct tt_maxp_table table)

Definition at line 108 of file tt_table.c.

{
  char *p, *data;

  p = data = NEW(TT_MAXP_TABLE_SIZE, char);
  p += sfnt_put_ulong(p, table->version);
  p += sfnt_put_ushort(p, table->numGlyphs);
  p += sfnt_put_ushort(p, table->maxPoints);
  p += sfnt_put_ushort(p, table->maxContours);
  p += sfnt_put_ushort(p, table->maxComponentPoints);
  p += sfnt_put_ushort(p, table->maxComponentContours);
  p += sfnt_put_ushort(p, table->maxZones);
  p += sfnt_put_ushort(p, table->maxTwilightPoints);
  p += sfnt_put_ushort(p, table->maxStorage);
  p += sfnt_put_ushort(p, table->maxFunctionDefs);
  p += sfnt_put_ushort(p, table->maxInstructionDefs);
  p += sfnt_put_ushort(p, table->maxStackElements);
  p += sfnt_put_ushort(p, table->maxSizeOfInstructions);
  p += sfnt_put_ushort(p, table->maxComponentElements);
  p += sfnt_put_ushort(p, table->maxComponentDepth);

  return data;
}

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struct tt_head_table* tt_read_head_table ( sfnt sfont) [read]

Definition at line 75 of file tt_table.c.

{
  int i;
  struct tt_head_table *table = NULL;

  sfnt_locate_table(sfont, "head");

  table = NEW(1, struct tt_head_table);
  table->version = sfnt_get_ulong(sfont);
  table->fontRevision = sfnt_get_ulong(sfont);
  table->checkSumAdjustment = sfnt_get_ulong(sfont);
  table->magicNumber = sfnt_get_ulong(sfont);
  table->flags = sfnt_get_ushort(sfont);
  table->unitsPerEm = sfnt_get_ushort(sfont);
  for (i=0; i<8; i++) {
    (table->created)[i] = sfnt_get_byte (sfont);
  }
  for (i=0; i<8; i++) {
    (table->modified)[i] = sfnt_get_byte (sfont);
  }
  table->xMin = sfnt_get_short(sfont);
  table->yMin = sfnt_get_short(sfont);
  table->xMax = sfnt_get_short(sfont);
  table->yMax = sfnt_get_short(sfont);
  table->macStyle = sfnt_get_short(sfont);
  table->lowestRecPPEM = sfnt_get_short(sfont);
  table->fontDirectionHint = sfnt_get_short(sfont);
  table->indexToLocFormat = sfnt_get_short(sfont);
  table->glyphDataFormat = sfnt_get_short(sfont);

  return table;
}

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struct tt_hhea_table* tt_read_hhea_table ( sfnt sfont) [read]

Definition at line 185 of file tt_table.c.

{
  int    i;
  ULONG  len;
  struct tt_hhea_table *table = NULL;

  sfnt_locate_table(sfont, "hhea");

  table = NEW(1, struct tt_hhea_table);
  table->version = sfnt_get_ulong(sfont);
  table->ascent  = sfnt_get_short (sfont);
  table->descent = sfnt_get_short(sfont);
  table->lineGap = sfnt_get_short(sfont);
  table->advanceWidthMax     = sfnt_get_ushort(sfont);
  table->minLeftSideBearing  = sfnt_get_short(sfont);
  table->minRightSideBearing = sfnt_get_short(sfont);
  table->xMaxExtent     = sfnt_get_short(sfont);
  table->caretSlopeRise = sfnt_get_short(sfont);
  table->caretSlopeRun  = sfnt_get_short(sfont);
  table->caretOffset    = sfnt_get_short(sfont);
  for(i = 0; i < 4; i++) {
    table->reserved[i] = sfnt_get_short(sfont);
  }
  table->metricDataFormat = sfnt_get_short(sfont);
  if (table->metricDataFormat != 0)
    ERROR("unknown metricDaraFormat");
  table->numOfLongHorMetrics = sfnt_get_ushort(sfont);

  len = sfnt_find_table_len(sfont, "hmtx");
  table->numOfExSideBearings = (USHORT)((len - table->numOfLongHorMetrics * 4) / 2);

  return table;
}

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struct tt_longMetrics* tt_read_longMetrics ( sfnt sfont,
USHORT  numGlyphs,
USHORT  numLongMetrics,
USHORT  numExSideBearings 
) [read]

Definition at line 326 of file tt_table.c.

{
  struct tt_longMetrics *m;
  USHORT gid, last_adv = 0;
  SHORT  last_esb = 0;

  m = NEW(numGlyphs, struct tt_longMetrics);
  for (gid = 0; gid < numGlyphs; gid++) {
    if (gid < numLongMetrics)
      last_adv = sfnt_get_ushort(sfont);
    if (gid < numLongMetrics + numExSideBearings)
      last_esb = sfnt_get_short(sfont);
    m[gid].advance     = last_adv;
    m[gid].sideBearing = last_esb;
  }

  return m;
}

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struct tt_maxp_table* tt_read_maxp_table ( sfnt sfont) [read]

Definition at line 132 of file tt_table.c.

{
  struct tt_maxp_table *table = NULL;

  sfnt_locate_table(sfont, "maxp");

  table = NEW(1, struct tt_maxp_table);
  table->version = sfnt_get_ulong(sfont);
  table->numGlyphs = sfnt_get_ushort(sfont);
  table->maxPoints = sfnt_get_ushort(sfont);
  table->maxContours = sfnt_get_ushort(sfont);
  table->maxComponentPoints = sfnt_get_ushort(sfont);
  table->maxComponentContours = sfnt_get_ushort(sfont);
  table->maxZones = sfnt_get_ushort(sfont);
  table->maxTwilightPoints = sfnt_get_ushort(sfont);
  table->maxStorage = sfnt_get_ushort(sfont);
  table->maxFunctionDefs = sfnt_get_ushort(sfont);
  table->maxInstructionDefs = sfnt_get_ushort(sfont);
  table->maxStackElements = sfnt_get_ushort(sfont);
  table->maxSizeOfInstructions = sfnt_get_ushort(sfont);
  table->maxComponentElements = sfnt_get_ushort(sfont);
  table->maxComponentDepth = sfnt_get_ushort(sfont);

  return table;
}

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struct tt_os2__table* tt_read_os2__table ( sfnt sfont) [read]

Definition at line 348 of file tt_table.c.

{
  struct tt_os2__table *table = NULL;
  int    i;

  table = NEW(1, struct tt_os2__table);

  if (sfnt_find_table_pos(sfont, "OS/2") > 0) {
    sfnt_locate_table(sfont, "OS/2");
    table->version       = sfnt_get_ushort(sfont);
    table->xAvgCharWidth = sfnt_get_short(sfont);
    table->usWeightClass = sfnt_get_ushort(sfont);
    table->usWidthClass  = sfnt_get_ushort(sfont);
    table->fsType        = sfnt_get_short(sfont);
    table->ySubscriptXSize   = sfnt_get_short(sfont);
    table->ySubscriptYSize   = sfnt_get_short(sfont);
    table->ySubscriptXOffset = sfnt_get_short(sfont);
    table->ySubscriptYOffset = sfnt_get_short(sfont);
    table->ySuperscriptXSize = sfnt_get_short(sfont);
    table->ySuperscriptYSize = sfnt_get_short(sfont);
    table->ySuperscriptXOffset = sfnt_get_short(sfont);
    table->ySuperscriptYOffset = sfnt_get_short(sfont);
    table->yStrikeoutSize      = sfnt_get_short(sfont);
    table->yStrikeoutPosition  = sfnt_get_short(sfont);
    table->sFamilyClass        = sfnt_get_short(sfont);
    for (i = 0; i < 10; i++) {
      table->panose[i] = sfnt_get_byte(sfont);
    }
    table->ulUnicodeRange1 = sfnt_get_ulong(sfont);
    table->ulUnicodeRange2 = sfnt_get_ulong(sfont);
    table->ulUnicodeRange3 = sfnt_get_ulong(sfont);
    table->ulUnicodeRange4 = sfnt_get_ulong(sfont);
    for (i = 0; i < 4; i++) {
      table->achVendID[i] = sfnt_get_char(sfont);
    }
    table->fsSelection      = sfnt_get_ushort(sfont);
    table->usFirstCharIndex = sfnt_get_ushort(sfont);
    table->usLastCharIndex  = sfnt_get_ushort(sfont);
    table->sTypoAscender    = sfnt_get_short(sfont);
    table->sTypoDescender   = sfnt_get_short(sfont);
    table->sTypoLineGap     = sfnt_get_short(sfont);
    table->usWinAscent      = sfnt_get_ushort(sfont);
    table->usWinDescent     = sfnt_get_ushort(sfont);
    table->ulCodePageRange1 = sfnt_get_ulong(sfont);
    table->ulCodePageRange2 = sfnt_get_ulong(sfont);
    if (table->version == 0x0002) {
      table->sxHeight      = sfnt_get_short(sfont);
      table->sCapHeight    = sfnt_get_short(sfont);
      table->usDefaultChar = sfnt_get_ushort(sfont);
      table->usBreakChar   = sfnt_get_ushort(sfont);
      table->usMaxContext  = sfnt_get_ushort(sfont);
    }
  } else {
    /* used in add_CIDVMetrics() of cidtype0.c */
    table->sTypoAscender  = 880;
    table->sTypoDescender = -120;
    /* used in tt_get_fontdesc() of tt_aux.c */
    table->usWeightClass = 400U; /* Normal(Regular) */
    table->xAvgCharWidth = 0; /* ignore */
    table->version = 0; /* TrueType rev 1.5 */
    table->fsType = 0; /* Installable Embedding */
    table->fsSelection = 0U; /* All undefined */
    table->sFamilyClass = 0; /* No Classification */
    for (i = 0; i < 10; i++) {
      table->panose[i] = 0; /* All Any */
    }
  }

  return table;
}

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struct tt_vhea_table* tt_read_vhea_table ( sfnt sfont) [read]

Definition at line 249 of file tt_table.c.

{
  int   i;
  ULONG len;
  struct tt_vhea_table *table = NULL;

  sfnt_locate_table(sfont, "vhea");

  table = NEW(1, struct tt_vhea_table);
  table->version = sfnt_get_ulong(sfont);
  table->vertTypoAscender = sfnt_get_short (sfont);
  table->vertTypoDescender = sfnt_get_short(sfont);
  table->vertTypoLineGap = sfnt_get_short(sfont);
  table->advanceHeightMax = sfnt_get_short(sfont); /* ushort ? */
  table->minTopSideBearing = sfnt_get_short(sfont);
  table->minBottomSideBearing = sfnt_get_short(sfont);
  table->yMaxExtent = sfnt_get_short(sfont);
  table->caretSlopeRise = sfnt_get_short(sfont);
  table->caretSlopeRun = sfnt_get_short(sfont);
  table->caretOffset = sfnt_get_short(sfont);
  for(i = 0; i < 4; i++) {
    (table->reserved)[i] = sfnt_get_short(sfont);
  }
  table->metricDataFormat = sfnt_get_short(sfont);
  table->numOfLongVerMetrics = sfnt_get_ushort(sfont);

  len = sfnt_find_table_len(sfont, "vmtx");
  table->numOfExSideBearings = (USHORT)((len - table->numOfLongVerMetrics * 4) / 2);

  return table;
}

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struct tt_VORG_table* tt_read_VORG_table ( sfnt sfont) [read]

Definition at line 283 of file tt_table.c.

{
  struct tt_VORG_table *vorg;
  ULONG  offset;
  USHORT i;

  offset = sfnt_find_table_pos(sfont, "VORG");

  if (offset > 0) {
    vorg = NEW(1, struct tt_VORG_table);

    sfnt_locate_table(sfont, "VORG");
    if (sfnt_get_ushort(sfont) != 1 ||
       sfnt_get_ushort(sfont) != 0)
      ERROR("Unsupported VORG version.");

    vorg->defaultVertOriginY    = sfnt_get_short(sfont);
    vorg->numVertOriginYMetrics = sfnt_get_ushort(sfont);
    vorg->vertOriginYMetrics    = NEW(vorg->numVertOriginYMetrics,
                                  struct tt_vertOriginYMetrics);
    /*
     * The vertOriginYMetrics array must be sorted in increasing
     * glyphIndex order.
     */
    for (i = 0;
        i < vorg->numVertOriginYMetrics; i++) {
      vorg->vertOriginYMetrics[i].glyphIndex  = sfnt_get_ushort(sfont);
      vorg->vertOriginYMetrics[i].vertOriginY = sfnt_get_short(sfont);
    }
  } else {
    vorg = NULL;
  }

  return vorg;
}

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