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/* $OpenBSD: ztsscale.c,v 1.1 2005/04/24 18:46:47 uwe Exp $ */
/*
* Copyright (c) 2005 Matthieu Herrb
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#include <sys/sysctl.h>
#include <machine/cpu.h>
#include <dev/wscons/wsconsio.h>
#include <err.h>
#include <fcntl.h>
#include <math.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define WIDTH 640
#define HEIGHT 480
#define BLACK 0x0
#define WHITE 0xffff
#define ADDR(x,y) (HEIGHT*(x)+(y))
unsigned short *mapaddr, *save;
int fd;
int xc[] = { 25, 25, 320, 615, 615 };
int yc[] = { 24, 455, 240, 25, 455 };
struct ctlname topname[] = CTL_NAMES;
struct ctlname machdepname[] = CTL_MACHDEP_NAMES;
void
cross(unsigned short *fb, int x, int y)
{
int i;
y = 480 - y;
for (i = x - 20; i <= x + 20; i++)
fb[ADDR(i,y)] = BLACK;
for (i = y - 20; i <= y + 20; i++)
fb[ADDR(x, i)] = BLACK;
}
void
wait_event(int mfd, int *x, int *y)
{
int down;
size_t len;
struct wscons_event evbuf;
down = 0;
*x = *y = -1;
while (!down || *x == -1 || *y == -1 ) {
len = read(mfd, &evbuf, sizeof(evbuf));
if (len != 16)
break;
switch (evbuf.type) {
case WSCONS_EVENT_MOUSE_DOWN:
down = 1;
break;
case WSCONS_EVENT_MOUSE_ABSOLUTE_X:
*x = evbuf.value;
break;
case WSCONS_EVENT_MOUSE_ABSOLUTE_Y:
*y = evbuf.value;
break;
}
}
while (down) {
len = read(mfd, &evbuf, sizeof(evbuf));
if (len != 16)
break;
switch (evbuf.type) {
case WSCONS_EVENT_MOUSE_UP:
down = 0;
break;
}
}
}
void
save_screen(void)
{
int mode = WSDISPLAYIO_MODE_DUMBFB;
if (ioctl(fd, WSDISPLAYIO_SMODE, &mode) == -1) {
warn("ioctl SMODE\n");
}
mapaddr = (void *)mmap(0, WIDTH*HEIGHT*sizeof(short),
PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
if (mapaddr == (void *)-1) {
err(2, "mmap");
}
save = (unsigned short *)malloc(WIDTH*HEIGHT*sizeof(unsigned short));
if (save == NULL)
err(2, "malloc");
memcpy(save, mapaddr, WIDTH*HEIGHT*sizeof(unsigned short));
}
void
restore_screen(void)
{
int mode = WSDISPLAYIO_MODE_EMUL;
memcpy(mapaddr, save, WIDTH*HEIGHT*sizeof(unsigned short));
if (ioctl(fd, WSDISPLAYIO_SMODE, &mode) == -1) {
warn("ioctl SMODE");
}
}
void
sighandler(int sig)
{
restore_screen();
close(fd);
_exit(2);
}
int
main(int argc, char *argv[])
{
int mfd;
int i, x[5], y[5];
double a, a1, a2, b, b1, b2, errx, erry;
int mib[2];
int rawmode;
int oldval;
size_t oldsize;
struct ztsscale {
int ts_minx;
int ts_maxx;
int ts_miny;
int ts_maxy;
} ts;
fd = open("/dev/ttyC0", O_RDWR);
if (fd < 0) {
err(2, "open /dev/ttyC0");
}
mfd = open("/dev/wsmouse", O_RDONLY);
if (mfd < 0)
err(2, "open /dev/wsmouse");
mib[0] = CTL_MACHDEP;
mib[1] = CPU_ZTSRAWMODE;
rawmode = 1;
oldsize = sizeof(oldval);
if (sysctl(mib, 2, &oldval, &oldsize, &rawmode,
sizeof(rawmode)) == -1)
err(1, "sysctl");
save_screen();
signal(SIGINT, sighandler);
for (i = 0; i < 5; i++) {
memset(mapaddr, WHITE, WIDTH*HEIGHT*sizeof(unsigned short));
cross(mapaddr, xc[i], yc[i]);
/* printf("waiting for event\n"); */
wait_event(mfd, &x[i], &y[i]);
}
restore_screen();
close(fd);
mib[0] = CTL_MACHDEP;
mib[1] = CPU_ZTSRAWMODE;
rawmode = oldval;
oldsize = sizeof(oldval);
if (sysctl(mib, 2, NULL, NULL, &rawmode, sizeof(rawmode)) == -1)
err(1, "sysctl");
bzero(&ts, sizeof(ts));
a1 = (x[4] - x[0])/(xc[4] - xc[0]);
b1 = x[0] - a1*xc[0];
a2 = (x[3] - x[1])/(xc[3] - xc[1]);
b2 = x[1] - a2*xc[1];
a = (a1+a2)/2.0;
b = (b1+b2)/2.0;
errx = a*WIDTH/2+b - x[2];
if (fabs(errx) > (a*WIDTH+b)*.05) {
fprintf(stderr, "X error (%.2f) too high, try again\n",
fabs(errx));
exit(2);
}
ts.ts_minx = (int)(b+0.5);
ts.ts_maxx = (int)(a*WIDTH+b+0.5);
a1 = (y[4] - y[0])/(yc[4] - yc[0]);
b1 = y[0] - a1*yc[0];
a2 = (y[3] - y[1])/(yc[3] - yc[1]);
b2 = y[1] - a2*yc[1];
a = (a1+a2)/2.0;
b = (b1+b2)/2.0;
erry = a*HEIGHT/2+b - y[2];
if (fabs(erry) > (a*HEIGHT+b)*.05) {
fprintf(stderr, "Y error (%.2f) too high, try again\n",
fabs(erry));
exit(2);
}
ts.ts_miny = (int)(b+0.5);
ts.ts_maxy = (int)(a*HEIGHT+b+0.5);
(void)printf("%s.%s=%d,%d,%d,%d\n", topname[CTL_MACHDEP].ctl_name,
machdepname[CPU_ZTSSCALE].ctl_name, ts.ts_minx, ts.ts_maxx,
ts.ts_miny, ts.ts_maxy);
return 0;
}
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