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/* hmtx.c -- Horizontal Metrics Table
* Copyright (C) 1997 Li-Da Lho, All right reserved
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include "ttf.h"
#include "ttfutil.h"
/* $Id: hmtx.c,v 1.1.1.1 1998/06/05 07:47:52 robert Exp $ */
static void ttfLoadHMTX(FILE *fp,HMTXPtr hmtx,ULONG offset);
/* Caution: Because of interdependency between tables,
* table hhea and maxp should be well initalized before
* ttfInitHMTX is been called
*/
void ttfInitHMTX(TTFontPtr font)
{
ULONG tag = FT_MAKE_TAG ('h', 'm', 't', 'x');
TableDirPtr ptd;
if ((ptd = ttfLookUpTableDir(tag,font)) != NULL)
{
font->hmtx = XCALLOC1 (HMTX);
font->hmtx->numberOfHMetrics = font->hhea->numberOfHMetrics;
font->hmtx->numberOfLSB = font->maxp->numGlyphs -
font->hhea->numberOfHMetrics;
ttfLoadHMTX(font->fp,font->hmtx,ptd->offset);
}
}
static void ttfLoadHMTX(FILE *fp,HMTXPtr hmtx,ULONG offset)
{
USHORT i,n = hmtx->numberOfHMetrics,m=hmtx->numberOfLSB;
xfseek(fp, offset, SEEK_SET, "ttfLoadHMTX");
hmtx->hMetrics = XCALLOC (n, longHorMetric);
for (i=0;i<n;i++)
{
(hmtx->hMetrics+i)->advanceWidth = ttfGetuFWord(fp);
(hmtx->hMetrics+i)->lsb = ttfGetFWord(fp);
}
/* codes dealing with leftSideBearing entry */
if (m)
{
hmtx->leftSideBearing = XCALLOC (m, FWord);
for (i=0;i<m;i++)
{
(hmtx->leftSideBearing)[i] = ttfGetFWord(fp);
}
}
}
void ttfPrintHMTX(FILE *fp,HMTXPtr hmtx)
{
int i;
fprintf(fp,"'hmtx' Table - Horizontal Metrics\n");
fprintf(fp,"---------------------------------\n");
for (i=0;i<hmtx->numberOfHMetrics;i++)
{
fprintf(fp,"\t %4d. advWid: %4d, LSBear: %4d\n",i,
(hmtx->hMetrics+i)->advanceWidth,
(hmtx->hMetrics+i)->lsb);
}
for (i=0;i<hmtx->numberOfLSB;i++)
{
fprintf(fp,"\t %4d. LSbear: %4d\n",i+hmtx->numberOfHMetrics,
(hmtx->leftSideBearing)[i]);
}
}
void ttfFreeHMTX(HMTXPtr hmtx)
{
free(hmtx->hMetrics);
if (hmtx->numberOfLSB)
free(hmtx->leftSideBearing);
free(hmtx);
}
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