mirror of
https://github.com/genodelabs/genode.git
synced 2024-12-29 10:08:53 +00:00
ca971bbfd8
This patch changes the top-level directory layout as a preparatory step for improving the tools for managing 3rd-party source codes. The rationale is described in the issue referenced below. Issue #1082
134 lines
3.3 KiB
C++
134 lines
3.3 KiB
C++
/*
|
|
* \brief Functor for drawing text into a surface
|
|
* \author Norman Feske
|
|
* \date 2006-08-04
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2006-2013 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__TEXT_PAINTER_H_
|
|
#define _INCLUDE__NITPICKER_GFX__TEXT_PAINTER_H_
|
|
|
|
#include <base/stdint.h>
|
|
#include <os/surface.h>
|
|
|
|
|
|
struct Text_painter
|
|
{
|
|
class Font
|
|
{
|
|
private:
|
|
|
|
typedef Genode::int32_t int32_t;
|
|
typedef Genode::size_t size_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, size_t len = ~0UL) const
|
|
{
|
|
const unsigned char *str = (const unsigned char *)sstr;
|
|
int res = 0;
|
|
for (; str && *str && len; len--, str++) res += wtab[*str];
|
|
return res;
|
|
}
|
|
|
|
/**
|
|
* Calculate height of string when printed with the font
|
|
*/
|
|
int str_h(const char *str, size_t len = ~0UL) const { return img_h; }
|
|
};
|
|
|
|
|
|
typedef Genode::Surface_base::Point Point;
|
|
typedef Genode::Surface_base::Area Area;
|
|
typedef Genode::Surface_base::Rect Rect;
|
|
|
|
|
|
template <typename PT>
|
|
static inline void paint(Genode::Surface<PT> &surface,
|
|
Point p,
|
|
Font const &font,
|
|
Genode::Color color,
|
|
char const *sstr)
|
|
{
|
|
unsigned char const *str = (unsigned char const *)sstr;
|
|
int x = p.x(), y = p.y();
|
|
|
|
unsigned char const *src = font.img;
|
|
int d, h = font.img_h;
|
|
|
|
/* check top clipping */
|
|
if ((d = surface.clip().y1() - y) > 0) {
|
|
src += d*font.img_w;
|
|
y += d;
|
|
h -= d;
|
|
}
|
|
|
|
/* check bottom clipping */
|
|
if ((d = y + h -1 - surface.clip().y2()) > 0)
|
|
h -= d;
|
|
|
|
if (h < 1) return;
|
|
|
|
/* skip hidden glyphs */
|
|
for ( ; *str && (x + font.wtab[*str] < surface.clip().x1()); )
|
|
x += font.wtab[*str++];
|
|
|
|
int const x_start = x;
|
|
|
|
PT *dst = surface.addr() + y*surface.size().w();
|
|
|
|
PT const pix(color.r, color.g, color.b);
|
|
int const alpha = color.a;
|
|
|
|
/* draw glyphs */
|
|
for ( ; *str && (x <= surface.clip().x2()); str++) {
|
|
|
|
int const w = font.wtab[*str];
|
|
int const start = Genode::max(0, surface.clip().x1() - x);
|
|
int const end = Genode::min(w - 1, surface.clip().x2() - x);
|
|
|
|
PT *d = dst + x;
|
|
unsigned char const *s = src + font.otab[*str];
|
|
|
|
for (int j = 0; j < h; j++, s += font.img_w, d += surface.size().w())
|
|
for (int i = start; i <= end; i++)
|
|
if (s[i])
|
|
d[i] = (s[i] == 255 && alpha == 255)
|
|
? pix : PT::mix(d[i], pix, (alpha*s[i]) >> 8);
|
|
x += w;
|
|
}
|
|
|
|
surface.flush_pixels(Rect(Point(x_start, y), Area(x - x_start + 1, h)));
|
|
}
|
|
};
|
|
|
|
#endif /* _INCLUDE__NITPICKER_GFX__TEXT_PAINTER_H_ */
|