/* Copyright (c) Mark J. Kilgard, 1994. */

/* This program is freely distributable without licensing fees
   and is provided without guarantee or warrantee expressed or
   implied. This program is -not- in the public domain. */

#include <glut.h>
#include "glutint.h"
#include "glutbitmap.h"

/* CENTRY */
int APIENTRY 
glutBitmapWidth(GLUTbitmapFont font, int c)
{
	BitmapFontPtr fontinfo;
	const BitmapCharRec *ch;

#ifdef WIN32
	fontinfo = (BitmapFontPtr) __glutFont(font);
#else
	fontinfo = (BitmapFontPtr) font;
#endif

	if (c < fontinfo->first || c >= fontinfo->first + fontinfo->num_chars)
		return 0;
	ch = fontinfo->ch[c - fontinfo->first];
	if (ch)
		return ch->advance;
	else
		return 0;
}

int APIENTRY 
glutBitmapLength(GLUTbitmapFont font, const unsigned char *string)
{
	int c, length;
	BitmapFontPtr fontinfo;
	const BitmapCharRec *ch;

#ifdef WIN32
	fontinfo = (BitmapFontPtr) __glutFont(font);
#else
	fontinfo = (BitmapFontPtr) font;
#endif

	length = 0;
	for (; *string != '\0'; string++) {
		c = *string;
		if (c >= fontinfo->first && c < fontinfo->first + fontinfo->num_chars) {
			ch = fontinfo->ch[c - fontinfo->first];
			if (ch)
				length += ch->advance;
		}
	}
	return length;
}