genode/os/include/nitpicker_gfx/font.h
2013-01-10 21:44:47 +01:00

64 lines
1.4 KiB
C++

/*
* \brief Font representation
* \date 2005-10-24
* \author Norman Feske
*/
/*
* Copyright (C) 2005-2013 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _INCLUDE__NITPICKER_GFX__FONT_H_
#define _INCLUDE__NITPICKER_GFX__FONT_H_
#include "nitpicker_types.h"
class Font
{
private:
typedef nitpicker_int32_t int32_t;
public:
unsigned char const *img; /* font image */
int const img_w, img_h; /* size of font image */
int32_t const *otab; /* offset table */
int32_t const *wtab; /* width table */
/**
* Construct font from a TFF data block
*/
Font(const char *tff)
:
img((unsigned char *)(tff + 2056)),
img_w(*((int32_t *)(tff + 2048))),
img_h(*((int32_t *)(tff + 2052))),
otab((int32_t *)(tff)),
wtab((int32_t *)(tff + 1024))
{ }
/**
* Calculate width of string when printed with the font
*/
int str_w(const char *sstr) const
{
const unsigned char *str = (const unsigned char *)sstr;
int res = 0;
for (; str && *str; str++) res += wtab[*str];
return res;
}
/**
* Calculate height of string when printed with the font
*/
int str_h(const char *str) const { return img_h; }
};
#endif /* _INCLUDE__NITPICKER_GFX__FONT_H_ */