1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdlib.h>
#include <linux/mxcfb.h>
#include <sys/ioctl.h>
#include "convert.h"
#include "fb.h"
#include "gpio.h"
#define CACHE_DIR "/run/media/mmcblk0p1/.freeonebook"
#define LEFT_CACHE CACHE_DIR "/left.gray"
#define RIGHT_CACHE CACHE_DIR "/right.gray"
static struct {
int fd;
unsigned char *addr;
struct fb_fix_screeninfo fsi;
struct fb_var_screeninfo vsi;
size_t size;
} fb;
static void fb_update(int x, int y, int w, int h)
{
static int marker = 0;
marker++;
struct mxcfb_update_data data = {
.update_mode = UPDATE_MODE_FULL,
.waveform_mode = WAVEFORM_MODE_AUTO,
.update_region.left = x,
.update_region.top = y,
.update_region.width = w,
.update_region.height = h,
.update_marker = marker,
.temp = TEMP_USE_AMBIENT,
.flags = 0,
};
printf("SEND_UPDATE: "); fflush(NULL); sync();
int r = -1;
int retries = 5;
do {
r = ioctl(fb.fd, MXCFB_SEND_UPDATE, &data);
printf("%d;", r);
} while (r == -1 && sleep(1) != INT_MAX && --retries > 0);
printf("%d\n", r); fflush(NULL); sync();
if (r == -1) {
perror("SEND_UPDATE");
}
struct mxcfb_update_marker_data md = {
.update_marker = marker,
};
printf("WAIT_FOR_UPDATE_COMPLETE: "); fflush(NULL); sync();
r = ioctl(fb.fd, MXCFB_WAIT_FOR_UPDATE_COMPLETE, &md);
printf("%d\n", r); fflush(NULL); sync();
}
void fb_blank(void)
{
memset(fb.addr, 0xff, fb.size);
fb_update(0, 0, fb.vsi.xres_virtual, fb.vsi.yres_virtual);
}
void fb_loadimage(int screen, const char *path)
{
const char *cache = screen == LEFT_SCREEN ? LEFT_CACHE : RIGHT_CACHE;
struct stat st;
stat(path, &st);
if (st.st_size != fb.vsi.xres * fb.vsi.yres) {
mkdir(CACHE_DIR, 0755);
printf("converting image\n");
convert(path, cache, fb.vsi.xres, fb.vsi.yres);
path = cache;
} else {
/* copy to cache */
}
int fd = open(path, O_RDONLY);
if (fd == -1) {
perror(path);
return;
}
fstat(fd, &st);
printf("mapping %zd bytes\n", st.st_size);
fflush(NULL); sync();
char *img = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
if (img == MAP_FAILED) {
perror("mmap of image");
return;
}
printf("copying image..."); fflush(NULL); sync();
unsigned char *buffer = fb.addr + (screen * fb.size / 2);
for (int y = 0; y < fb.vsi.yres; y++) {
memcpy(buffer + (y * fb.vsi.xres_virtual), img + (y * fb.vsi.xres), fb.vsi.xres);
}
memcpy(buffer, img, st.st_size);
printf("done\n"); fflush(NULL); sync();
munmap(img, st.st_size);
close(fd);
fb_update(0, 0, fb.vsi.xres, fb.vsi.yres);
}
void fb_init(void)
{
fb.fd = open("/dev/fb0", O_RDWR);
ioctl(fb.fd, FBIOGET_FSCREENINFO, &fb.fsi);
ioctl(fb.fd, FBIOGET_VSCREENINFO, &fb.vsi);
fb.vsi.bits_per_pixel = 8;
fb.vsi.grayscale = GRAYSCALE_8BIT;
fb.vsi.activate = FB_ACTIVATE_FORCE;
ioctl(fb.fd, FBIOPUT_VSCREENINFO, &fb.vsi);
fb.size = fb.vsi.xres_virtual * fb.vsi.yres_virtual;
fb.addr = mmap(NULL, fb.size, PROT_READ | PROT_WRITE, MAP_SHARED, fb.fd, 0);
}
|
