| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 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 | |
| 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 | |
| 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 | |
| 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 | } |