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  
atafb_mfb_copyarea(struct fb_info * info,u_long next_line,int sy,int sx,int dy,int dx,int height,int width)23  void 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  
atafb_mfb_fillrect(struct fb_info * info,u_long next_line,u32 color,int sy,int sx,int height,int width)53  void 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  
atafb_mfb_linefill(struct fb_info * info,u_long next_line,int dy,int dx,u32 width,const u8 * data,u32 bgcolor,u32 fgcolor)76  void 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