--- /dev/null
+/*
+ * (C) GraÅžvydas "notaz" Ignotas, 2011
+ *
+ * This work is licensed under the terms of any of these licenses
+ * (at your option):
+ * - GNU GPL, version 2 or later.
+ * - GNU LGPL, version 2.1 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <dlfcn.h>
+#include <tslib.h>
+#include "plugin_lib.h"
+#include "pl_gun_ts.h"
+#include "menu.h"
+#include "../plugins/dfinput/main.h"
+
+static int gun_x, gun_y, gun_in;
+static int ts_multiplier_x, ts_multiplier_y, ts_offs_x, ts_offs_y;
+static int (*pts_read)(struct tsdev *dev, struct ts_sample *sample, int nr);
+
+#define limit(v, min, max) \
+ if (v < min) v = min; \
+ else if (v > max) v = max
+
+void pl_gun_ts_update(struct tsdev *ts, int *x, int *y, int *in)
+{
+ struct ts_sample sample;
+ int sx = 0, sy = 0, sp = 0, updated = 0;
+
+ if (ts != NULL) {
+ while (pts_read(ts, &sample, 1) > 0) {
+ sx = sample.x;
+ sy = sample.y;
+ sp = sample.pressure;
+ updated = 1;
+ }
+
+ if (updated) {
+ gun_x = (sx - ts_offs_x) * ts_multiplier_x >> 10;
+ gun_y = (sy - ts_offs_y) * ts_multiplier_y >> 10;
+ limit(gun_x, 0, 1023);
+ limit(gun_y, 0, 1023);
+ if (sp && !(g_opts & OPT_TSGUN_NOTRIGGER))
+ gun_in |= GUNIN_TRIGGER;
+ else
+ gun_in &= ~GUNIN_TRIGGER;
+ }
+ }
+
+ *x = gun_x;
+ *y = gun_y;
+ *in = gun_in | in_state_gun;
+}
+
+void pl_set_gun_rect(int x, int y, int w, int h)
+{
+ ts_offs_x = x;
+ ts_offs_y = y;
+ ts_multiplier_x = (1<<20) / w;
+ ts_multiplier_y = (1<<20) / h;
+}
+
+struct tsdev *pl_gun_ts_init(void)
+{
+ struct tsdev *(*pts_open)(const char *dev_name, int nonblock) = NULL;
+ int (*pts_config)(struct tsdev *) = NULL;
+ int (*pts_close)(struct tsdev *) = NULL;
+ const char *tsdevname;
+ struct tsdev *ts;
+ void *ltsh;
+
+ tsdevname = getenv("TSLIB_TSDEVICE");
+ if (tsdevname == NULL)
+ tsdevname = "/dev/input/touchscreen0";
+
+ // avoid hard dep on tslib
+ ltsh = dlopen("/usr/lib/libts-1.0.so.0", RTLD_LAZY);
+ if (ltsh == NULL)
+ ltsh = dlopen("/usr/lib/libts-0.0.so.0", RTLD_LAZY);
+ if (ltsh == NULL) {
+ fprintf(stderr, "%s\n", dlerror());
+ goto fail;
+ }
+
+ pts_open = dlsym(ltsh, "ts_open");
+ pts_config = dlsym(ltsh, "ts_config");
+ pts_read = dlsym(ltsh, "ts_read");
+ pts_close = dlsym(ltsh, "ts_close");
+ if (pts_open == NULL || pts_config == NULL || pts_read == NULL || pts_close == NULL) {
+ fprintf(stderr, "%s\n", dlerror());
+ goto fail_dlsym;
+ }
+
+ ts = pts_open(tsdevname, 1);
+ if (ts == NULL)
+ goto fail_open;
+ if (pts_config(ts) != 0)
+ goto fail_config;
+
+ // FIXME: we should be able to get this somewhere
+ // the problem is this doesn't always match resolution due to different display modes
+ pl_set_gun_rect(0, 0, 800, 480);
+ return ts;
+
+fail_config:
+ pts_close(ltsh);
+fail_open:
+fail_dlsym:
+ dlclose(ltsh);
+ ltsh = NULL;
+fail:
+ fprintf(stderr, "Could not open touchscreen\n");
+ return NULL;
+}
+