add guncon support

[pcsx_rearmed.git] / frontend / pl_gun_ts.c

diff --git a/frontend/pl_gun_ts.c b/frontend/pl_gun_ts.c
new file mode 100644 (file)
index 0000000..63cf33f
--- /dev/null
+++ b/frontend/pl_gun_ts.c
@@ -0,0 +1,118 @@
+/*
+ * (C) Gražvydas "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;
+}
+