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#include <stdio.h>
#include <stdlib.h>
#include "config.h"
#include "ttf.h"
#include "ttfutil.h"
#ifdef MEMCHECK
#include <dmalloc.h>
#endif
/* $Id: loca.c,v 1.1.1.1 1998/06/05 07:47:52 robert Exp $ */
#ifndef lint
static char vcid[] = "$Id: loca.c,v 1.1.1.1 1998/06/05 07:47:52 robert Exp $";
#endif /* lint */
static LOCAPtr ttfAllocLOCA(TTFontPtr font);
static void ttfLoadLOCA(FILE *fp,LOCAPtr loca,ULONG offset);
void ttfInitLOCA(TTFontPtr font)
{
ULONG tag = 'l' | 'o' << 8 | 'c' << 16 | 'a' <<24;
TableDirPtr ptd;
if ((ptd = ttfLookUpTableDir(tag,font)) != NULL)
{
font->loca = (LOCAPtr) ttfAllocLOCA(font);
ttfLoadLOCA(font->fp,font->loca,ptd->offset);
}
}
static LOCAPtr ttfAllocLOCA(TTFontPtr font)
{
USHORT n=0;
LOCAPtr loca;
if ((loca = (LOCAPtr) calloc(1,sizeof(LOCA))) == NULL)
{
ttfError("Out of Memory\n");
}
else
{
loca->indexToLocFormat = font->head->indexToLocFormat;
loca->numGlyphs = n = font->maxp->numGlyphs;
}
n += 1;/* the number of loca entry is numberOfGlyph+1 */
if ((loca->offset = (ULONG *) calloc(n,sizeof(ULONG))) == NULL)
{
ttfError("Out Of Memory\n");
free (loca);
return NULL;
}
return loca;
}
static void ttfLoadLOCA(FILE *fp,LOCAPtr loca,ULONG offset)
{
/* warrning: the number of loca entry is numberOfGlyph+1 !! */
USHORT i,n = loca->numGlyphs+1;
if (fseek(fp,offset,SEEK_SET) !=0)
ttfError("Fseek Failed in ttfLOADLOCA \n");
switch (loca->indexToLocFormat)
{
case LOCA_OFFSET_SHORT:
for (i=0;i<n;i++)
{
(loca->offset)[i] = (ULONG) ttfGetUSHORT(fp)*2;
}
break;
case LOCA_OFFSET_LONG:
if (fread(loca->offset,sizeof(ULONG),n,fp) != n)
ttfError("Error reading loca data\n");
#ifndef WORDS_BIGENDIAN
FourByteSwap((unsigned char *) loca->offset,n*sizeof(ULONG));
#endif
break;
}
}
void ttfPrintLOCA(FILE *fp,LOCAPtr loca)
{
USHORT i;
fprintf(fp,"'loca' Table - Index to Location\n");
fprintf(fp,"--------------------------------\n");
for (i=0;i<loca->numGlyphs;i++)
{
fprintf(fp,"\t Idx %6d -> GlyphOffset 0x%08x\n",i,
(loca->offset)[i]);
}
fprintf (fp,"\t Ended at 0x%08x\n",(loca->offset)[loca->numGlyphs]);
}
void ttfFreeLOCA(LOCAPtr loca)
{
free (loca->offset);
free (loca);
}
ULONG ttfLookUpGlyfLOCA(LOCAPtr loca,USHORT idx)
{
/* out of bound or it is a non-glyph character */
if (idx >= loca->numGlyphs ||
loca->offset[idx] == loca->offset[idx+1])
return (loca->offset)[0];
return (loca->offset)[idx];
}
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