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atafb_mfb.c
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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