/* actually, EncodingTable is a part of SubTable */
static void ttfLoadEncodingTable(FILE *fp,SubTablePtr subTable,ULONG offset)
{
if (fseek(fp,offset,SEEK_SET) !=0)
ttfError("Fseek Failed in ttfLoadEncodingTable \n");
subTable->PlatformID = ttfGetUSHORT(fp);
subTable->EncodingID = ttfGetUSHORT(fp);
subTable->offset = ttfGetULONG(fp);
}
static void ttfLoadLTSH (FILE *fp,LTSHPtr ltsh,ULONG offset)
{
xfseek(fp, offset, SEEK_SET, "ttfLoadLTSH");
ltsh->version = ttfGetUSHORT(fp);
ltsh->numGlyphs = ttfGetUSHORT(fp);
ltsh->yPels = ttfMakeBYTE (ltsh->numGlyphs, fp);
}
static void ttfLoadCMAP2(FILE *fp,SubTablePtr subTable,ULONG offset)
{
USHORT * array,i,n = 0;
USHORT numGlyphId;
SubHeaderPtr header;
if (fseek(fp,offset,SEEK_SET) != 0)
ttfError("Fseek Failed in ttfLoadCMAP2 \n");
subTable->map.cmap2 = (CMAP2 *) calloc(1,sizeof(CMAP2));
array = subTable->map.cmap2->subHeaderKeys;
if (fread(array,sizeof(USHORT),256,fp) != 256)
ttfError("Error when getting subHeaderKeys \n");
#ifndef WORDS_BIGENDIAN
TwoByteSwap((unsigned char *) array,256*sizeof(USHORT));
#endif
for (i=0;i<256;i++)
{
array[i] /= 8;
if (n< array[i])
n = array[i]; /* find the max of subHeaderKeys */
}
n += 1; /* the number of subHeaders is one plus the max of subHeaderKeys */
subTable->map.cmap2->subHeaders = header =
(SubHeaderPtr) calloc(n,sizeof(SubHeader));
for (i=0;i<n;i++)
{
(header+i)->firstCode = ttfGetUSHORT(fp);
(header+i)->entryCount = ttfGetUSHORT(fp);
(header+i)->idDelta = ttfGetSHORT(fp);
(header+i)->idRangeOffset = ttfGetUSHORT(fp);
/* it makes things easier to let the offset starts from
* the beginning of glyphIndexArray */
if ((header+i)->idRangeOffset != 0)
(header+i)->idRangeOffset -= (sizeof(USHORT) +
(n-i-1) * sizeof(SubHeader)) ;
}
/* caculate the length of glyphIndexArray, this is ugly, there should be
* a better way to get this information. */
numGlyphId =
subTable->length - (256 + 3) * sizeof(USHORT) - n * sizeof(SubHeader);
numGlyphId /= sizeof(USHORT);
subTable->map.cmap2->glyphIndexArray =
(USHORT *) calloc(numGlyphId,sizeof(USHORT));
for (i=0;i<numGlyphId;i++)
{
subTable->map.cmap2->glyphIndexArray[i] = ttfGetUSHORT(fp);
}
}
static void ttfLoadGASP (FILE *fp,GASPPtr gasp,ULONG offset)
{
int i;
xfseek(fp, offset, SEEK_SET, "ttfLoadGASP");
gasp->version = ttfGetUSHORT(fp);
gasp->numRanges = ttfGetUSHORT(fp);
gasp->gaspRange = XCALLOC (gasp->numRanges, GASPRANGE);
for (i=0;i<gasp->numRanges;i++)
{
gasp->gaspRange[i].rangeMaxPPEM = ttfGetUSHORT(fp);
gasp->gaspRange[i].rangeGaspBehavior = ttfGetUSHORT(fp);
}
}
USHORT *ttfMakeUSHORT(size_t nelem, FILE *fp)
{
int i;
USHORT *array = XTALLOC (nelem, USHORT);
for (i = 0; i < nelem; i++)
array[i] = ttfGetUSHORT (fp);
return array;
}
static void ttfLoadCMAP6(FILE *fp,SubTablePtr subTable,ULONG offset)
{
USHORT * array,len;
if (fseek(fp,offset,SEEK_SET) !=0)
ttfError("Fseek Failed in ttfLoadCMAP6 \n");
subTable->map.cmap6 = (CMAP6 *) calloc(1,sizeof(CMAP6));
subTable->map.cmap6->firstCode = ttfGetUSHORT(fp);
subTable->map.cmap6->entryCount = len = ttfGetUSHORT(fp);
subTable->map.cmap6->glyphIndexArray = array =
(USHORT *) calloc(subTable->map.cmap6->entryCount,sizeof(USHORT));
if (fread(array,sizeof(USHORT),len,fp) != len)
ttfError("Error when getting idRangeOffset\n");
#ifndef WORDS_BIGENDIAN
TwoByteSwap((unsigned char *) array,len*sizeof(USHORT));
#endif
}
static void ttfLoadNAME(FILE *fp,NAMEPtr name,ULONG offset)
{
USHORT i,n;
ULONG pos;
if (fseek(fp,offset,SEEK_SET) !=0)
ttfError("Fseek Failed in ttfLOADNAME \n");
name->format = ttfGetUSHORT(fp);
name->numberOfRecords = n = ttfGetUSHORT(fp);
name->offset = ttfGetUSHORT(fp);
if ((name->NameRecords = (NameRecordPtr) calloc(n,sizeof(NameRecord))) == NULL)
ttfError("Out Of Memory\n");
pos = offset + sizeof(USHORT)*3;
for(i=0;i<n;i++,pos+=12 /*sizeof(NameRecord)*/)
{
ttfLoadNameRecord(fp,name->NameRecords+i,pos);
ttfLoadNameRecordData(fp,name->NameRecords+i,offset+name->offset);
}
}
/* should this one be static ? */
static void ttfLoadSubTable(FILE *fp,SubTablePtr subTable,ULONG base)
{
ULONG pos;
USHORT format;
/* seek to the actuall position for this subtable
* base: beginning of cmap
* offset: offset field of each encoding table */
pos = base + subTable->offset;
if (fseek(fp,pos,SEEK_SET) !=0)
ttfError("Fseek Failed in ttfLoadSubTable\n");
subTable->format = format = ttfGetUSHORT(fp);
subTable->length = ttfGetUSHORT(fp);
subTable->version = ttfGetUSHORT(fp);
pos += 6;/* step over format independent data,USHORT*3 */
switch(format)
{
case 0:
ttfLoadCMAP0(fp,subTable,pos);
break;
case 2:
ttfLoadCMAP2(fp,subTable,pos);
break;
case 4:
ttfLoadCMAP4(fp,subTable,pos);
break;
case 6:
ttfLoadCMAP6(fp,subTable,pos);
break;
default:
ttfError("Unrecognized CMAP format\n");
}
}
static void ttfLoadCMAP(FILE *fp,CMAPPtr cmap,ULONG offset)
{
USHORT i,n;
ULONG posEnc; /* beginning of the Encoding Table */
ULONG baseSub = offset; /* base of SubTable offset */
if (fseek(fp,offset,SEEK_SET) !=0)
ttfError("Fseek Failed in ttfLOADCMAP \n");
cmap->version = ttfGetUSHORT(fp);
cmap->numberOfEncodings = n = ttfGetUSHORT(fp);
cmap->subTables = ttfAllocSubTable(cmap);
posEnc = baseSub + sizeof(USHORT)*2; /* step over the beginning of encoding
* table */
/* for each encoding scheme, load the encoding table (EncodingTable) and
* the real cmap data (SubTable) */
for (i=0;i<n;i++,posEnc += 8)
{ /* 8 == ushort*2 + ulong*1 */
ttfLoadEncodingTable(fp,cmap->subTables+i,posEnc);
ttfLoadSubTable(fp,cmap->subTables+i,baseSub);
}
}
/* offset: address of the beginning of the name record */
static void ttfLoadNameRecord(FILE *fp,NameRecordPtr rec,ULONG offset)
{
if (fseek(fp,offset,SEEK_SET) !=0)
ttfError("Fseek Failed in ttfLoadNameRecord \n");
rec->PlatformID = ttfGetUSHORT(fp);
rec->EncodingID = ttfGetUSHORT(fp);
rec->LanguageID = ttfGetUSHORT(fp);
rec->NameID = ttfGetUSHORT(fp);
rec->length = ttfGetUSHORT(fp);
rec->offset = ttfGetUSHORT(fp);
}
static void ttfLoadCMAP4(FILE *fp,SubTablePtr subTable,ULONG offset)
{
USHORT segCount;
USHORT * array,len;
if (fseek(fp,offset,SEEK_SET) !=0)
ttfError("Fseek Failed in ttfLoadCMAP4 \n");
subTable->map.cmap4 = (CMAP4 *) calloc(1,sizeof(CMAP4));
subTable->map.cmap4->segCountX2 = segCount = ttfGetUSHORT(fp);
subTable->map.cmap4->searchRange = ttfGetUSHORT(fp);
subTable->map.cmap4->entrySelector = ttfGetUSHORT(fp);
subTable->map.cmap4->rangeShift = ttfGetUSHORT(fp);
segCount /= 2;
subTable->map.cmap4->endCount = array =
(USHORT *) calloc(segCount,sizeof(USHORT));
if (fread(array,sizeof(USHORT),segCount,fp) != segCount)
ttfError("Error when getting endCount\n");
#ifndef WORDS_BIGENDIAN
TwoByteSwap((unsigned char *) array,segCount*sizeof(USHORT));
#endif
subTable->map.cmap4->reservedPad = ttfGetUSHORT(fp);
subTable->map.cmap4->startCount = array =
(USHORT *) calloc(segCount,sizeof(USHORT));
if (fread(array,sizeof(USHORT),segCount,fp) != segCount)
ttfError("Error when getting startCount\n");
#ifndef WORDS_BIGENDIAN
TwoByteSwap((unsigned char *) array,segCount*sizeof(USHORT));
#endif
subTable->map.cmap4->idDelta = array =
(USHORT *) calloc(segCount,sizeof(USHORT));
if (fread(array,sizeof(USHORT),segCount,fp) != segCount)
ttfError("Error when getting idDelta\n");
#ifndef WORDS_BIGENDIAN
TwoByteSwap((unsigned char *) array,segCount*sizeof(USHORT));
#endif
subTable->map.cmap4->idRangeOffset = array =
(USHORT *) calloc(segCount,sizeof(USHORT));
if (fread(array,sizeof(USHORT),segCount,fp) != segCount)
ttfError("Error when getting idRangeOffset\n");
#ifndef WORDS_BIGENDIAN
TwoByteSwap((unsigned char *) array,segCount*sizeof(USHORT));
#endif
/* caculate the length of glyphIndexArray, this is ugly, there should be
* a better way to get this information. */
len = subTable->length - 8*sizeof(USHORT) - 4*segCount*sizeof(USHORT);
len /= sizeof(USHORT);
subTable->map.cmap4->glyphIndexArray = array =
(USHORT *) calloc(len,sizeof(USHORT));
if (fread(array,sizeof(USHORT),len,fp) != len)
ttfError("Error when getting idRangeOffset\n");
#ifndef WORDS_BIGENDIAN
TwoByteSwap((unsigned char *) array,len*sizeof(USHORT));
#endif
}
uFWord ttfGetuFWord(FILE *fp)
{
return (uFWord) ttfGetUSHORT(fp);
}
F2Dot14 ttfGetF2Dot14(FILE *fp)
{
return (F2Dot14) ttfGetUSHORT(fp);
}
static void ttfLoadMAXP(FILE *fp,MAXPPtr maxp,ULONG offset)
{
xfseek(fp, offset, SEEK_SET, "ttfLoadMAXP");
maxp->version = ttfGetFixed(fp);
maxp->numGlyphs = ttfGetUSHORT(fp);
maxp->maxPoints = ttfGetUSHORT(fp);
maxp->maxContours = ttfGetUSHORT(fp);
maxp->maxCompositePoints = ttfGetUSHORT(fp);
maxp->maxCompositeContours = ttfGetUSHORT(fp);
maxp->maxZones = ttfGetUSHORT(fp);
maxp->maxTwilightPoints = ttfGetUSHORT(fp);
maxp->maxStorage = ttfGetUSHORT(fp);
maxp->maxFunctionDefs = ttfGetUSHORT(fp);
maxp->maxInstructionDefs = ttfGetUSHORT(fp);
maxp->maxStackElements = ttfGetUSHORT(fp);
maxp->maxSizeOfInstructions = ttfGetUSHORT(fp);
maxp->maxComponentElements = ttfGetUSHORT(fp);
maxp->maxComponentDepth = ttfGetUSHORT(fp);
}
static void ttfLoadKERN (FILE *fp,KERNPtr kern,ULONG offset)
{
int i;
if (fseek(fp,offset,SEEK_SET) !=0)
ttfError("Fseek Failed in ttfLoadKERN \n");
kern->version = ttfGetUSHORT(fp);
kern->nTables = ttfGetUSHORT(fp);
kern->subtable = (KernSubtable *) calloc(kern->nTables,
sizeof(KernSubtable));
for (i=0;i<kern->nTables;i++)
{
struct kernpair *pairs;
int j,n;
(kern->subtable+i)->version = ttfGetUSHORT(fp);
(kern->subtable+i)->length = ttfGetUSHORT(fp);
(kern->subtable+i)->coverage = ttfGetUSHORT(fp);
switch ((kern->subtable+i)->coverage >> 8)
{
case 0:
(kern->subtable+i)->kern.kern0.nPairs = n =
ttfGetUSHORT(fp);
(kern->subtable+i)->kern.kern0.searchRange =
ttfGetUSHORT(fp);
(kern->subtable+i)->kern.kern0.entrySelector =
ttfGetUSHORT(fp);
(kern->subtable+i)->kern.kern0.rangeShift =
ttfGetUSHORT(fp);
(kern->subtable+i)->kern.kern0.pairs = pairs =
(struct kernpair *) calloc(n,sizeof (struct kernpair));
for (j=0;j<n;j++)
{
(pairs+j)->left = ttfGetUSHORT(fp);
(pairs+j)->right = ttfGetUSHORT(fp);
(pairs+j)->value = ttfGetFWord(fp);
}
break;
case 2:
/* not implemented yet */
break;
default:
/* do nothing */
break;
}
}
}
FUnit ttfGetFUnit(FILE *fp)
{
return (FUnit) ttfGetUSHORT(fp);
}
/* Read arrays. */
void ttfReadUSHORT(USHORT *array, size_t nelem, FILE *fp)
{
int i;
for (i = 0; i < nelem; i++)
array[i] = ttfGetUSHORT (fp);
}
