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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/module.h> |
13 | #include <linux/string.h> |
14 | #include <linux/fb.h> |
15 | |
16 | #include "atafb.h" |
17 | #include "atafb_utils.h" |
18 | |
19 | |
20 | /* |
21 | * Monochrome |
22 | */ |
23 | |
24 | void atafb_mfb_copyarea(struct fb_info *info, u_long next_line, |
25 | int sy, int sx, int dy, int dx, |
26 | int height, int width) |
27 | { |
28 | u8 *src, *dest; |
29 | u_int rows; |
30 | |
31 | if (sx == 0 && dx == 0 && width == next_line) { |
32 | src = (u8 *)info->screen_base + sy * (width >> 3); |
33 | dest = (u8 *)info->screen_base + dy * (width >> 3); |
34 | fb_memmove(dest, src, height * (width >> 3)); |
35 | } else if (dy <= sy) { |
36 | src = (u8 *)info->screen_base + sy * next_line + (sx >> 3); |
37 | dest = (u8 *)info->screen_base + dy * next_line + (dx >> 3); |
38 | for (rows = height; rows--;) { |
39 | fb_memmove(dest, src, width >> 3); |
40 | src += next_line; |
41 | dest += next_line; |
42 | } |
43 | } else { |
44 | src = (u8 *)info->screen_base + (sy + height - 1) * next_line + (sx >> 3); |
45 | dest = (u8 *)info->screen_base + (dy + height - 1) * next_line + (dx >> 3); |
46 | for (rows = height; rows--;) { |
47 | fb_memmove(dest, src, width >> 3); |
48 | src -= next_line; |
49 | dest -= next_line; |
50 | } |
51 | } |
52 | } |
53 | |
54 | void atafb_mfb_fillrect(struct fb_info *info, u_long next_line, u32 color, |
55 | int sy, int sx, int height, int width) |
56 | { |
57 | u8 *dest; |
58 | u_int rows; |
59 | |
60 | dest = (u8 *)info->screen_base + sy * next_line + (sx >> 3); |
61 | |
62 | if (sx == 0 && width == next_line) { |
63 | if (color) |
64 | fb_memset255(dest, height * (width >> 3)); |
65 | else |
66 | fb_memclear(dest, height * (width >> 3)); |
67 | } else { |
68 | for (rows = height; rows--; dest += next_line) { |
69 | if (color) |
70 | fb_memset255(dest, width >> 3); |
71 | else |
72 | fb_memclear_small(dest, width >> 3); |
73 | } |
74 | } |
75 | } |
76 | |
77 | void atafb_mfb_linefill(struct fb_info *info, u_long next_line, |
78 | int dy, int dx, u32 width, |
79 | const u8 *data, u32 bgcolor, u32 fgcolor) |
80 | { |
81 | u8 *dest; |
82 | u_int rows; |
83 | |
84 | dest = (u8 *)info->screen_base + dy * next_line + (dx >> 3); |
85 | |
86 | for (rows = width / 8; rows--; /* check margins */ ) { |
87 | // use fast_memmove or fb_memmove |
88 | *dest++ = *data++; |
89 | } |
90 | } |
91 | |
92 | #ifdef MODULE |
93 | MODULE_LICENSE("GPL"); |
94 | |
95 | int init_module(void) |
96 | { |
97 | return 0; |
98 | } |
99 | |
100 | void cleanup_module(void) |
101 | { |
102 | } |
103 | #endif /* MODULE */ |
104 | |
105 | |
106 | /* |
107 | * Visible symbols for modules |
108 | */ |
109 | |
110 | EXPORT_SYMBOL(atafb_mfb_copyarea); |
111 | EXPORT_SYMBOL(atafb_mfb_fillrect); |
112 | EXPORT_SYMBOL(atafb_mfb_linefill); |
113 |
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