1/*
2 *  linux/drivers/video/mfb.c -- Low level frame buffer operations for
3 *				 monochrome
4 *
5 *	Created 5 Apr 1997 by Geert Uytterhoeven
6 *
7 *  This file is subject to the terms and conditions of the GNU General Public
8 *  License.  See the file COPYING in the main directory of this archive for
9 *  more details.
10 */
11
12#include <linux/string.h>
13#include <linux/fb.h>
14
15#include "atafb.h"
16#include "atafb_utils.h"
17
18
19    /*
20     *  Monochrome
21     */
22
23void atafb_mfb_copyarea(struct fb_info *info, u_long next_line,
24			int sy, int sx, int dy, int dx,
25			int height, int width)
26{
27	u8 *src, *dest;
28	u_int rows;
29
30	if (sx == 0 && dx == 0 && width == next_line) {
31		src = (u8 *)info->screen_base + sy * (width >> 3);
32		dest = (u8 *)info->screen_base + dy * (width >> 3);
33		fb_memmove(dest, src, height * (width >> 3));
34	} else if (dy <= sy) {
35		src = (u8 *)info->screen_base + sy * next_line + (sx >> 3);
36		dest = (u8 *)info->screen_base + dy * next_line + (dx >> 3);
37		for (rows = height; rows--;) {
38			fb_memmove(dest, src, width >> 3);
39			src += next_line;
40			dest += next_line;
41		}
42	} else {
43		src = (u8 *)info->screen_base + (sy + height - 1) * next_line + (sx >> 3);
44		dest = (u8 *)info->screen_base + (dy + height - 1) * next_line + (dx >> 3);
45		for (rows = height; rows--;) {
46			fb_memmove(dest, src, width >> 3);
47			src -= next_line;
48			dest -= next_line;
49		}
50	}
51}
52
53void atafb_mfb_fillrect(struct fb_info *info, u_long next_line, u32 color,
54			int sy, int sx, int height, int width)
55{
56	u8 *dest;
57	u_int rows;
58
59	dest = (u8 *)info->screen_base + sy * next_line + (sx >> 3);
60
61	if (sx == 0 && width == next_line) {
62		if (color)
63			fb_memset255(dest, height * (width >> 3));
64		else
65			fb_memclear(dest, height * (width >> 3));
66	} else {
67		for (rows = height; rows--; dest += next_line) {
68			if (color)
69				fb_memset255(dest, width >> 3);
70			else
71				fb_memclear_small(dest, width >> 3);
72		}
73	}
74}
75
76void atafb_mfb_linefill(struct fb_info *info, u_long next_line,
77			int dy, int dx, u32 width,
78			const u8 *data, u32 bgcolor, u32 fgcolor)
79{
80	u8 *dest;
81	u_int rows;
82
83	dest = (u8 *)info->screen_base + dy * next_line + (dx >> 3);
84
85	for (rows = width / 8; rows--; /* check margins */ ) {
86		// use fast_memmove or fb_memmove
87		*dest++ = *data++;
88	}
89}
90