OpenCores
URL https://opencores.org/ocsvn/test_project/test_project/trunk

Subversion Repositories test_project

[/] [test_project/] [trunk/] [linux_sd_driver/] [drivers/] [video/] [console/] [fbcon_rotate.h] - Blame information for rev 62

Details | Compare with Previous | View Log

Line No. Rev Author Line
1 62 marcus.erl
/*
2
 *  linux/drivers/video/console/fbcon_rotate.h -- Software Display Rotation
3
 *
4
 *      Copyright (C) 2005 Antonino Daplas <adaplas@pol.net>
5
 *
6
 *  This file is subject to the terms and conditions of the GNU General Public
7
 *  License.  See the file COPYING in the main directory of this archive
8
 *  for more details.
9
 */
10
 
11
#ifndef _FBCON_ROTATE_H
12
#define _FBCON_ROTATE_H
13
 
14
#define GETVYRES(s,i) ({                           \
15
        (s == SCROLL_REDRAW || s == SCROLL_MOVE) ? \
16
        (i)->var.yres : (i)->var.yres_virtual; })
17
 
18
#define GETVXRES(s,i) ({                           \
19
        (s == SCROLL_REDRAW || s == SCROLL_MOVE || !(i)->fix.xpanstep) ? \
20
        (i)->var.xres : (i)->var.xres_virtual; })
21
 
22
 
23
static inline int pattern_test_bit(u32 x, u32 y, u32 pitch, const char *pat)
24
{
25
        u32 tmp = (y * pitch) + x, index = tmp / 8,  bit = tmp % 8;
26
 
27
        pat +=index;
28
        return (*pat) & (0x80 >> bit);
29
}
30
 
31
static inline void pattern_set_bit(u32 x, u32 y, u32 pitch, char *pat)
32
{
33
        u32 tmp = (y * pitch) + x, index = tmp / 8, bit = tmp % 8;
34
 
35
        pat += index;
36
 
37
        (*pat) |= 0x80 >> bit;
38
}
39
 
40
static inline void rotate_ud(const char *in, char *out, u32 width, u32 height)
41
{
42
        int i, j;
43
        int shift = (8 - (width % 8)) & 7;
44
 
45
        width = (width + 7) & ~7;
46
 
47
        for (i = 0; i < height; i++) {
48
                for (j = 0; j < width; j++) {
49
                        if (pattern_test_bit(j, i, width, in))
50
                                pattern_set_bit(width - (1 + j + shift),
51
                                                height - (1 + i),
52
                                                width, out);
53
                }
54
 
55
        }
56
}
57
 
58
static inline void rotate_cw(const char *in, char *out, u32 width, u32 height)
59
{
60
        int i, j, h = height, w = width;
61
        int shift = (8 - (height % 8)) & 7;
62
 
63
        width = (width + 7) & ~7;
64
        height = (height + 7) & ~7;
65
 
66
        for (i = 0; i < h; i++) {
67
                for (j = 0; j < w; j++) {
68
                        if (pattern_test_bit(j, i, width, in))
69
                                pattern_set_bit(height - 1 - i - shift, j,
70
                                                height, out);
71
 
72
                }
73
        }
74
}
75
 
76
static inline void rotate_ccw(const char *in, char *out, u32 width, u32 height)
77
{
78
        int i, j, h = height, w = width;
79
        int shift = (8 - (width % 8)) & 7;
80
 
81
        width = (width + 7) & ~7;
82
        height = (height + 7) & ~7;
83
 
84
        for (i = 0; i < h; i++) {
85
                for (j = 0; j < w; j++) {
86
                        if (pattern_test_bit(j, i, width, in))
87
                                pattern_set_bit(i, width - 1 - j - shift,
88
                                                height, out);
89
                }
90
        }
91
}
92
 
93
extern void fbcon_rotate_cw(struct fbcon_ops *ops);
94
extern void fbcon_rotate_ud(struct fbcon_ops *ops);
95
extern void fbcon_rotate_ccw(struct fbcon_ops *ops);
96
#endif

powered by: WebSVN 2.1.0

© copyright 1999-2025 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.