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/* $Id: gdtextsize.c,v 1.7 2005/10/18 19:05:55 ellson Exp $ $Revision: 1.7 $ */
/* vim:set shiftwidth=4 ts=8: */
/**********************************************************
* This software is part of the graphviz package *
* http://www.graphviz.org/ *
* *
* Copyright (c) 1994-2004 AT&T Corp. *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Corp. *
* *
* Information and Software Systems Research *
* AT&T Research, Florham Park NJ *
**********************************************************/
#include "render.h"
#include "gd.h"
/* sometimes fonts are stored under a different name */
char *gd_alternate_fontlist(char *font)
{
#ifdef HAVE_GD_FONTCONFIG
return font;
#else
static char *fontbuf;
static int fontbufsz;
char *p, *fontlist;
int len;
len = strlen(font) + 1;
if (len > fontbufsz) {
fontbufsz = 2 * len;
if (fontbuf)
fontbuf = malloc(fontbufsz);
else
fontbuf = realloc(fontbuf, fontbufsz);
}
/* fontbuf to contain font without style descriptions like -Roman or -Italic */
strcpy(fontbuf, font);
if ((p = strchr(fontbuf, '-')) || (p = strchr(fontbuf, '_')))
*p = 0;
fontlist = fontbuf;
if ((strcasecmp(font, "times-bold") == 0)
|| (strcasecmp(fontbuf, "timesbd") == 0)
|| (strcasecmp(fontbuf, "timesb") == 0))
fontlist = "timesbd;Timesbd;TIMESBD;timesb;Timesb;TIMESB";
else if ((strcasecmp(font, "times-italic") == 0)
|| (strcasecmp(fontbuf, "timesi") == 0))
fontlist = "timesi;Timesi;TIMESI";
else if ((strcasecmp(font, "timesnewroman") == 0)
|| (strcasecmp(font, "timesnew") == 0)
|| (strcasecmp(font, "timesroman") == 0)
|| (strcasecmp(fontbuf, "times") == 0))
fontlist = "times;Times;TIMES";
else if ((strcasecmp(font, "arial-bold") == 0)
|| (strcasecmp(fontbuf, "arialb") == 0))
fontlist = "arialb;Alialb;ARIALB";
else if ((strcasecmp(font, "arial-italic") == 0)
|| (strcasecmp(fontbuf, "ariali") == 0))
fontlist = "ariali;Aliali;ARIALI";
else if (strcasecmp(fontbuf, "helvetica") == 0)
fontlist = "helvetica;Helvetica;HELVETICA;arial;Arial;ARIAL";
else if (strcasecmp(fontbuf, "arial") == 0)
fontlist = "arial;Arial;ARIAL";
else if (strcasecmp(fontbuf, "courier") == 0)
fontlist = "courier;Courier;COURIER;cour";
return fontlist;
#endif /* HAVE_GD_FONTCONFIG */
}
/* return size in points (1/72 in) for the string in font at fontsz in points */
char *gd_textsize(textline_t * textline, char *fontname, double fontsz,
char **fontpath)
{
char *fontlist, *err;
int brect[8];
gdFTStringExtra strex;
strex.flags = gdFTEX_XSHOW
| gdFTEX_RETURNFONTPATHNAME | gdFTEX_RESOLUTION;
strex.xshow = NULL;
strex.hdpi = strex.vdpi = 72;
if (strstr(fontname, "/"))
strex.flags |= gdFTEX_FONTPATHNAME;
else
strex.flags |= gdFTEX_FONTCONFIG;
textline->width = 0.0;
textline->xshow = NULL;
fontlist = gd_alternate_fontlist(fontname);
if (fontlist) {
if (fontsz <= FONTSIZE_MUCH_TOO_SMALL) {
/* OK, but ignore text entirely */
return NULL;
} else if (fontsz <= FONTSIZE_TOO_SMALL) {
/* draw line in place of text */
/* fake a finite fontsize so that line length is calculated */
fontsz = FONTSIZE_TOO_SMALL;
}
#ifdef HAVE_GD_FREETYPE
/* call gdImageStringFT with null *im to get brect and to set font cache */
err = gdImageStringFTEx(NULL, brect, -1, fontlist,
fontsz, 0, 0, 0, textline->str, &strex);
if (err)
return err;
if (strex.xshow) {
/* transfer malloc'ed xshow string to textline */
textline->xshow = strex.xshow;
strex.xshow = NULL;
}
*fontpath = strex.fontpath;
if (textline->str && textline->str[0]) {
/* can't use brect on some archtectures if strlen 0 */
textline->width = (double) (brect[4] - brect[0]);
}
#else
return "No Freetype support available";
#endif
}
return NULL;
}
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