path: root/tools/mtview.c

#include <utouch/frame-xi2.h>
#include <utouch/frame-mtdev.h>
#include <linux/input.h>
#include <stdio.h>
#include <fcntl.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
#include <unistd.h>

#define XMARG 16
#define YMARG 16
#define DEF_FRAC 0.15
#define DEF_WIDTH 0.05

#define DIM_TOUCH 32

static int opcode;
struct mtdev;

struct windata {
	Display *dsp;
	Window root, win;
	GC gc;
	int screen, width, height;
	unsigned long white, black;
	unsigned long color[DIM_TOUCH];
	int id[DIM_TOUCH];
};

static inline float max(float a, float b)
{
	return b > a ? b : a;
}

static unsigned long new_color(struct windata *w)
{
	return lrand48() & 0xffffff;
}

static void clear_screen(struct windata *w)
{
	XSetForeground(w->dsp, w->gc, w->black);
	XFillRectangle(w->dsp, w->win, w->gc, 0, 0, w->width, w->height);
}

static void output_touch(utouch_frame_handle fh, struct windata *w,
			 const struct utouch_contact *t)
{
	const struct utouch_surface *s = utouch_frame_get_surface(fh);

	float x1 = s->min_x, y1 = s->min_y;
	float x2 = s->max_x, y2 = s->max_y;
	float dx = x2 - x1, dy = y2 - y1;
	float major = 0, minor = 0, angle = 0;

	if (s->use_pressure) {
		float p = DEF_FRAC / s->max_pressure;
		major = t->pressure * p * dx;
		minor = t->pressure * p * dx;
		angle = 0;
	}
	if (s->use_touch_major) {
		major = t->touch_major;
		minor = t->touch_minor;
		angle = t->orientation;
	}
	if (major == 0 && minor == 0) {
		major = DEF_WIDTH * dy;
		minor = DEF_WIDTH * dx;
	}

	float ac = fabs(cos(angle));
	float as = fabs(sin(angle));
	float mx = max(minor * ac, major * as);
	float my = max(major * ac, minor * as);

	if (w->id[t->slot] != t->id) {
		w->id[t->slot] = t->id;
		w->color[t->slot] = new_color(w);
	}

	XSetForeground(w->dsp, w->gc, w->color[t->slot]);
	XFillArc(w->dsp, w->win, w->gc, t->x - mx / 2, t->y - my / 2, mx, my, 0,
		 360 * 64);
	XFlush(w->dsp);
}

static void report_frame(utouch_frame_handle fh,
			 const struct utouch_frame *frame,
			 struct windata *w)
{
	int i;

	for (i = 0; i < frame->num_active; i++)
		output_touch(fh, w, frame->active[i]);
}

static int init_window(struct windata *w)
{
	int event, err;
	int i;
	memset(w, 0, sizeof(w));
	for (i = 0; i < DIM_TOUCH; i++)
		w->id[i] = -1;

	w->dsp = XOpenDisplay(NULL);
	if (!w->dsp)
		return -1;
	if (!XQueryExtension(w->dsp, "XInputExtension", &opcode, &event, &err))
		return -1;

	w->screen = DefaultScreen(w->dsp);
	w->white = WhitePixel(w->dsp, w->screen);
	w->black = BlackPixel(w->dsp, w->screen);
	w->width = DisplayWidth(w->dsp, w->screen) - XMARG;
	w->height = DisplayHeight(w->dsp, w->screen) - YMARG;

	w->root = DefaultRootWindow(w->dsp);
	w->win = XCreateSimpleWindow(w->dsp, w->root,
				    0, 0, w->width, w->height,
				    0, w->black, w->white);


	w->gc = XCreateGC(w->dsp, w->win, 0, NULL);

	XMapWindow(w->dsp, w->win);
	XFlush(w->dsp);

	return 0;
}

static void term_window(struct windata *w)
{
	XDestroyWindow(w->dsp, w->win);
	XCloseDisplay(w->dsp);
}

static void run_window_mtdev(utouch_frame_handle fh, struct mtdev *dev, int fd)
{
	long eventMask = StructureNotifyMask;
	const struct utouch_frame *frame;
	struct input_event iev;
	struct windata w;
	XWindowAttributes attrs;
	XEvent xev;

	if (init_window(&w))
		return;

	XSelectInput(w.dsp, w.win, eventMask);

	do {
		XNextEvent(w.dsp, &xev);
	} while (xev.type != MapNotify);


	XSelectInput(w.dsp, w.win, StructureNotifyMask);

	clear_screen(&w);

	XGetWindowAttributes(w.dsp, w.win, &attrs);
	utouch_frame_mtdev_set_dimensions(fh, attrs.width, attrs.height);

	while (1) {
		while (!mtdev_idle(dev, fd, 100)) {
			while (mtdev_get(dev, fd, &iev, 1) > 0) {
				frame = utouch_frame_pump_mtdev(fh, &iev);
				if (frame)
					report_frame(fh, frame, &w);
			}
		}
		while (XPending(w.dsp)) {
			XNextEvent(w.dsp, &xev);
			if (xev.type == ConfigureNotify) {
				XConfigureEvent *xce = (XConfigureEvent *)&xev;
				utouch_frame_mtdev_set_dimensions(fh,
								  xce->width,
								  xce->height);
			}
		}
	}

	term_window(&w);
}

static void run_window_xi2(struct windata *w,
			   utouch_frame_handle fh,
			   XIDeviceInfo *dev)
{
	const struct utouch_frame *frame;
	XIEventMask mask;

	fprintf(stderr, "xi2 running\n");

	XSelectInput(w->dsp, w->win, StructureNotifyMask);
	XSelectInput(w->dsp, XDefaultRootWindow(w->dsp), StructureNotifyMask);

	mask.deviceid = dev->deviceid;
	mask.mask_len = XIMaskLen(XI_TouchMotion);
	mask.mask = calloc(mask.mask_len, sizeof(char));

	XISetMask(mask.mask, XI_PropertyEvent);
	XISetMask(mask.mask, XI_TouchBegin);
	XISetMask(mask.mask, XI_TouchMotion);
	XISetMask(mask.mask, XI_TouchEnd);
	XISelectEvents(w->dsp, w->win, &mask, 1);

	

	while (1) {
		XEvent ev;
		XNextEvent(w->dsp, &ev);
		XConfigureEvent *xce = &ev.xconfigure;

		if (ev.type == ConfigureNotify && (xce->width != w->width ||
						   xce->height != w->height)) {
			w->width = xce->width;
			w->height = xce->height;
			clear_screen(w);
		}

		frame = utouch_frame_pump_xi2(fh, &ev);
		if (frame)
			report_frame(fh, frame, w);
	}
}

static int run_mtdev(const char *name)
{
	struct evemu_device *evemu;
	struct mtdev *mtdev;
	utouch_frame_handle fh;
	int fd;

	fd = open(name, O_RDONLY | O_NONBLOCK);
	if (fd < 0) {
		fprintf(stderr, "error: could not open device\n");
		return -1;
	}

	evemu = evemu_new(0);
	if (!evemu || evemu_extract(evemu, fd)) {
		fprintf(stderr, "error: could not describe device\n");
		return -1;
	}
	if (!utouch_frame_is_supported_mtdev(evemu)) {
		fprintf(stderr, "error: unsupported device\n");
		return -1;
	}
	mtdev = mtdev_new_open(fd);
	if (!mtdev) {
		fprintf(stderr, "error: could not open mtdev\n");
		return -1;
	}
	fh = utouch_frame_new_engine(100, 32, 100);
	if (!fh || utouch_frame_init_mtdev(fh, evemu)) {
		fprintf(stderr, "error: could not init frame\n");
		return -1;
	}

	run_window_mtdev(fh, mtdev, fd);

	utouch_frame_delete_engine(fh);
	mtdev_close_delete(mtdev);
	evemu_delete(evemu);

	ioctl(fd, EVIOCGRAB, 0);
	close(fd);

	return 0;
}

static int run_xi2(int id)
{
	struct windata w;
	XIDeviceInfo *info, *dev;
	utouch_frame_handle fh;
	int ndevice;
	int i;

	if (init_window(&w)) {
		fprintf(stderr, "error: could not init window\n");
		return -1;
	}

	info = XIQueryDevice(w.dsp, XIAllDevices, &ndevice);
	dev = 0;
	for (i = 0; i < ndevice; i++)
		if (info[i].deviceid == id)
			dev = &info[i];
	if (!dev)
		return -1;

	if (!utouch_frame_is_supported_xi2(w.dsp, dev)) {
		fprintf(stderr, "error: unsupported device\n");
		return -1;
	}

	fh = utouch_frame_new_engine(100, 32, 100);
	if (!fh || utouch_frame_init_xi2(fh, w.dsp, dev)) {
		fprintf(stderr, "error: could not init frame\n");
		return -1;
	}

	run_window_xi2(&w, fh, dev);

	utouch_frame_delete_engine(fh);
	XIFreeDeviceInfo(info);
	term_window(&w);

	return 0;
}

int main(int argc, char *argv[])
{
	int id, ret;

	if (argc < 2) {
		fprintf(stderr, "Usage: %s <device>\n", argv[0]);
		return -1;
	}

	id = atoi(argv[1]);
	if (id)
		ret = run_xi2(id);
	else
		ret = run_mtdev(argv[1]);

	return ret;
}