video/fbdev/atafb_mfb.c

0001 /*
0002  *  linux/drivers/video/mfb.c -- Low level frame buffer operations for
0003  *               monochrome
0004  *
0005  *  Created 5 Apr 1997 by Geert Uytterhoeven
0006  *
0007  *  This file is subject to the terms and conditions of the GNU General Public
0008  *  License.  See the file COPYING in the main directory of this archive for
0009  *  more details.
0010  */
0011
0012 #include <linux/string.h>
0013 #include <linux/fb.h>
0014
0015 #include "atafb.h"
0016 #include "atafb_utils.h"
0017
0018
0019     /*
0020      *  Monochrome
0021      */
0022
0023 void atafb_mfb_copyarea(struct fb_info *info, u_long next_line,
0024             int sy, int sx, int dy, int dx,
0025             int height, int width)
0026 {
0027     u8 *src, *dest;
0028     u_int rows;
0029
0030     if (sx == 0 && dx == 0 && width == next_line) {
0031         src = (u8 *)info->screen_base + sy * (width >> 3);
0032         dest = (u8 *)info->screen_base + dy * (width >> 3);
0033         fb_memmove(dest, src, height * (width >> 3));
0034     } else if (dy <= sy) {
0035         src = (u8 *)info->screen_base + sy * next_line + (sx >> 3);
0036         dest = (u8 *)info->screen_base + dy * next_line + (dx >> 3);
0037         for (rows = height; rows--;) {
0038             fb_memmove(dest, src, width >> 3);
0039             src += next_line;
0040             dest += next_line;
0041         }
0042     } else {
0043         src = (u8 *)info->screen_base + (sy + height - 1) * next_line + (sx >> 3);
0044         dest = (u8 *)info->screen_base + (dy + height - 1) * next_line + (dx >> 3);
0045         for (rows = height; rows--;) {
0046             fb_memmove(dest, src, width >> 3);
0047             src -= next_line;
0048             dest -= next_line;
0049         }
0050     }
0051 }
0052
0053 void atafb_mfb_fillrect(struct fb_info *info, u_long next_line, u32 color,
0054             int sy, int sx, int height, int width)
0055 {
0056     u8 *dest;
0057     u_int rows;
0058
0059     dest = (u8 *)info->screen_base + sy * next_line + (sx >> 3);
0060
0061     if (sx == 0 && width == next_line) {
0062         if (color)
0063             fb_memset255(dest, height * (width >> 3));
0064         else
0065             fb_memclear(dest, height * (width >> 3));
0066     } else {
0067         for (rows = height; rows--; dest += next_line) {
0068             if (color)
0069                 fb_memset255(dest, width >> 3);
0070             else
0071                 fb_memclear_small(dest, width >> 3);
0072         }
0073     }
0074 }
0075
0076 void atafb_mfb_linefill(struct fb_info *info, u_long next_line,
0077             int dy, int dx, u32 width,
0078             const u8 *data, u32 bgcolor, u32 fgcolor)
0079 {
0080     u8 *dest;
0081     u_int rows;
0082
0083     dest = (u8 *)info->screen_base + dy * next_line + (dx >> 3);
0084
0085     for (rows = width / 8; rows--; /* check margins */ ) {
0086         // use fast_memmove or fb_memmove
0087         *dest++ = *data++;
0088     }
0089 }