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#include <stdio.h>
#include <stdlib.h>
#include "config.h"
#include "ttf.h"
#include "ttfutil.h"
/* $Id: loca.c,v 1.1.1.1 1998/06/05 07:47:52 robert Exp $ */
static LOCAPtr ttfAllocLOCA(TTFontPtr font);
static void ttfLoadLOCA(FILE *fp,LOCAPtr loca,ULONG offset);
void ttfInitLOCA(TTFontPtr font)
{
ULONG tag = FT_MAKE_TAG ('l', 'o', 'c', 'a');
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;
loca = XCALLOC1 (LOCA);
loca->indexToLocFormat = font->head->indexToLocFormat;
loca->numGlyphs = n = font->maxp->numGlyphs;
n += 1;/* the number of loca entry is numberOfGlyph+1 */
loca->offset = XCALLOC (n, ULONG);
return loca;
}
static void ttfLoadLOCA(FILE *fp,LOCAPtr loca,ULONG offset)
{
/* warning: the number of loca entry is numberOfGlyph+1 !! */
USHORT i,n = loca->numGlyphs+1;
xfseek(fp, offset, SEEK_SET, "ttfLoadLOCA");
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:
ttfReadULONG (loca->offset, n, fp);
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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