#ifndef UNSUPPORTED
static inline void
drawchar(struct image *img, int x, int y, int fgcolor,
	 unsigned char letter)
{
    int fontwidth = (RWIDTH(letter) + 7) / 8;
    CONST unsigned char *bitmap = &DATA[letter * HEIGHT * fontwidth];
    cpixel_t *current;
    int yend = y + HEIGHT;
    if (y < 0)
	bitmap -= y, y = 0;
    if (yend > img->height)
	yend = img->height;
    for (; y < yend; y++) {
	int b = *(bitmap++);
	int i = (1 << (RWIDTH(letter) - 1));
	if (fontwidth == 2) {
	    b <<= 8;
	    b |= *bitmap++;
	}
	current = (cpixel_t *) img->currlines[y];
	p_inc(current, x);
	while (i) {
	    if (i & b) {
		p_set(current, fgcolor);
	    }
	    i >>= 1;
	    p_inc(current, 1);
	}
    }
}

static inline void
hline(struct image *img, int x, int y, int length, int fgcolor)
{
    cpixel_t *current = (cpixel_t *) img->currlines[y], *end =
	(cpixel_t *) img->currlines[y];
    p_inc(current, x);
    p_inc(end, x + length);
#ifdef bpp1
    memset(current, fgcolor, end - current + 1);
#else
    while (current <= end) {
	p_set(current, fgcolor);
	p_inc(current, 1);
    }
#endif
}

static inline void
vline(struct image *img, int x, int y, int length, int fgcolor)
{
    length += y;
    while (y <= length) {
	cpixel_t *current = (cpixel_t *) img->currlines[y];
	p_inc(current, x);
	p_set(current, fgcolor);
	y++;
    }
}

static inline void
rectangle(struct image *img, int x, int y, int width, int height,
	  int fgcolor)
{
    height += y;
    while (y < height)
	hline(img, x, y, width - 1, fgcolor), y++;
}

static inline char *savevline(struct image *img, int x, int y, int length)
{
    cpixel_t *saved = (cpixel_t *) malloc(length * bpp + bpp), *s = saved;
    length += y;
    while (y <= length) {
	cpixel_t *current = (cpixel_t *) img->currlines[y];
	p_copy(s, 0, current, x);
	p_inc(s, 1);
	y++;
    }
    return (char *) saved;
}

static inline void
restorevline(struct image *img, char *saved, int x, int y, int length)
{
    cpixel_t *s = (cpixel_t *) saved;
    length += y;
    while (y <= length) {
	cpixel_t *current = (cpixel_t *) img->currlines[y];
	p_copy(current, x, s, 0);
	p_inc(s, 1);
	y++;
    }
}

static inline char *saveline(struct image *img, int x, int y, int x2,
			     int y2)
{
    int dx = x2 - x;
    int dy = y2 - y;
    int ady = abs(dy);
    if (dx < ady) {
	cpixel_t *saved = (cpixel_t *) malloc((ady + 1) * bpp * 2), *s =
	    saved;
	int plus = (dx << 16) / ady;
	if (dy < 0) {
	    int dy = (x << 16) /*| (65536 / 2) */ ;
	    ady = y;
	    while (ady >= y2) {
		cpixel_t *current = (cpixel_t *) img->currlines[ady];
		p_inc(current, (dy >> 16));
		p_copy(s, 0, current, 0);
		p_copy(s, 1, current, 1);
		p_inc(s, 2);
		dy += plus;
		ady--;
	    }
	} else {
	    int dy = (x << 16) /*| (65536 / 2) */ ;
	    ady = y;
	    while (ady <= y2) {
		cpixel_t *current = (cpixel_t *) img->currlines[ady];
		p_inc(current, (dy >> 16));
		p_copy(s, 0, current, 0);
		p_copy(s, 1, current, 1);
		p_inc(s, 2);
		dy += plus;
		ady++;
	    }
	}
	return ((char *) saved);
    } else {
	cpixel_t *saved = (cpixel_t *) malloc((dx + 1) * bpp * 2), *s =
	    saved;
	int plus = (dy << 16) / dx;
	ady = x;
	dy = (y << 16);
	while (ady <= x2) {
	    cpixel_t *current = (cpixel_t *) img->currlines[dy >> 16];
	    p_copy(s, 0, current, ady);
	    current = (cpixel_t *) img->currlines[(dy >> 16) + 1];
	    p_copy(s, 1, current, ady);
	    p_inc(s, 2);
	    dy += plus;
	    ady++;
	}
	return ((char *) saved);
    }
}

static inline void
restoreline(struct image *img, char *saved, int x, int y, int x2, int y2)
{
    int dx = x2 - x;
    int dy = y2 - y;
    int ady = abs(dy);
    if (dx < ady) {
	cpixel_t *s = (cpixel_t *) saved;
	int plus = (dx << 16) / ady;
	if (dy < 0) {
	    int dy = (x << 16) /*| (65536 / 2) */ ;
	    ady = y;
	    while (ady >= y2) {
		cpixel_t *current = (cpixel_t *) img->currlines[ady];
		p_inc(current, (dy >> 16));
		p_copy(current, 0, s, 0);
		p_copy(current, 1, s, 1);
		p_inc(s, 2);
		dy += plus;
		ady--;
	    }
	} else {
	    int dy = (x << 16) /*| (65536 / 2) */ ;
	    ady = y;
	    while (ady <= y2) {
		cpixel_t *current = (cpixel_t *) img->currlines[ady];
		p_inc(current, (dy >> 16));
		p_copy(current, 0, s, 0);
		p_copy(current, 1, s, 1);
		p_inc(s, 2);
		dy += plus;
		ady++;
	    }
	}
    } else {
	cpixel_t *s = (cpixel_t *) saved;
	int plus = (dy << 16) / dx;
	ady = x;
	dy = (y << 16);
	while (ady <= x2) {
	    cpixel_t *current = (cpixel_t *) img->currlines[dy >> 16];
	    p_copy(current, ady, s, 0);
	    current = (cpixel_t *) img->currlines[(dy >> 16) + 1];
	    p_copy(current, ady, s, 1);
	    p_inc(s, 2);
	    dy += plus;
	    ady++;
	}
    }
}

#ifdef bpp1
#define myinterpol(a,b,n) intergray(a,b,n)
#else
#define myinterpol(a,b,n) interpol(a,b,n,rmask,gmask,bmask)
#endif
static inline void
line(struct image *img, int x, int y, int x2, int y2, int color)
{
    int dx = x2 - x;
    int dy = y2 - y;
    int ady = abs(dy);
#ifndef bpp1
    int rmask = img->palette->info.truec.rmask;
    int gmask = img->palette->info.truec.gmask;
    int bmask = img->palette->info.truec.bmask;
#endif
#ifdef bpp1
    if (img->palette->type &= (C256 | FIXEDCOLOR)) {
	if (dx < ady) {
	    int plus = (dx << 16) / ady;
	    if (dy < 0) {
		int dy = (x << 16) | (65536 / 2);
		ady = y;
		while (ady >= y2) {
		    cpixel_t *current = (cpixel_t *) img->currlines[ady];
		    p_inc(current, (dy >> 16));
		    p_set(current, color);
		    dy += plus;
		    ady--;
		}
	    } else {
		int dy = (x << 16) | (65536 / 2);
		ady = y;
		while (ady <= y2) {
		    cpixel_t *current = (cpixel_t *) img->currlines[ady];
		    p_inc(current, (dy >> 16));
		    p_set(current, color);
		    dy += plus;
		    ady++;
		}
	    }
	} else {
	    int plus = (dy << 16) / dx;
	    ady = x;
	    dy = (y << 16) | (65536 / 2);
	    while (ady <= x2) {
		cpixel_t *current = (cpixel_t *) img->currlines[dy >> 16];
		p_setp(current, ady, color);
		dy += plus;
		ady++;
	    }
	}
	return;
    }
#endif

    if (dx < ady) {
	int plus = (dx << 16) / ady;
	if (dy < 0) {
	    int dy = (x << 16);
	    ady = y;
	    while (ady >= y2) {
		cpixel_t *current = (cpixel_t *) img->currlines[ady];
		p_inc(current, (dy >> 16));
		p_set(current,
		      myinterpol(p_get(current), color,
				 ((dy & 65535) >> 8)));
		p_setp(current, 1,
		       myinterpol(color, p_getp(current, 1),
				  ((dy & 65535) >> 8)));
		dy += plus;
		ady--;
	    }
	} else {
	    int dy = (x << 16);
	    ady = y;
	    while (ady <= y2) {
		cpixel_t *current = (cpixel_t *) img->currlines[ady];
		p_inc(current, (dy >> 16));
		p_set(current,
		      myinterpol(p_get(current), color,
				 ((dy & 65535) >> 8)));
		p_setp(current, 1,
		       myinterpol(color, p_getp(current, 1),
				  ((dy & 65535) >> 8)));
		dy += plus;
		ady++;
	    }
	}
    } else {
	int plus = (dy << 16) / dx;
	ady = x;
	dy = (y << 16);
	while (ady <= x2) {
	    cpixel_t *current = (cpixel_t *) img->currlines[dy >> 16];
	    p_setp(current, ady,
		   myinterpol(p_getp(current, ady), color,
			      ((dy & 65535) >> 8)));
	    current = (cpixel_t *) img->currlines[(dy >> 16) + 1];
	    p_setp(current, ady,
		   myinterpol(color, p_getp(current, ady),
			      ((dy & 65535) >> 8)));
	    dy += plus;
	    ady++;
	}
    }
}

#undef myinterpol
#endif

#undef drawchar
#undef hline
#undef vline
#undef rectangle
#undef line
#undef restoreline
#undef saveline
#undef savevline
#undef restorevline