90 lines · c
1/*2 * linux/drivers/video/mfb.c -- Low level frame buffer operations for3 * monochrome4 *5 * Created 5 Apr 1997 by Geert Uytterhoeven6 *7 * This file is subject to the terms and conditions of the GNU General Public8 * License. See the file COPYING in the main directory of this archive for9 * 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 * Monochrome21 */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 else65 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 else71 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_memmove87 *dest++ = *data++;88 }89}90