frontend: add touchscreen-as-buttons input code

[pcsx_rearmed.git] / frontend / in_tsbutton.c

diff --git a/frontend/in_tsbutton.c b/frontend/in_tsbutton.c
new file mode 100644 (file)
index 0000000..4e2cef0
--- /dev/null
+++ b/frontend/in_tsbutton.c
@@ -0,0 +1,147 @@
+/*
+ * (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 <tslib.h>
+
+#include "common/input.h"
+#include "in_tsbutton.h"
+
+#define IN_TSBUTTON_PREFIX "tsbutton:"
+#define IN_TSBUTTON_COUNT 4
+static int tsbutton_down_id;
+static int last_tsbutton_id;
+
+#define TS_WIDTH 320
+#define TS_HEIGHT 240
+
+// HACK: stealing this from plugin_lib
+extern void *tsdev;
+extern int (*pts_read)(struct tsdev *dev, struct ts_sample *sample, int nr);
+extern int (*pts_fd)(struct tsdev *dev);
+
+static const char * const in_tsbutton_keys[IN_TSBUTTON_COUNT] = {
+       "TS1", "TS2", "TS3", "TS4",
+};
+
+static void in_tsbutton_probe(void)
+{
+       struct tsdev *dev = tsdev;
+       if (dev == NULL) {
+               fprintf(stderr, "in_tsbutton_probe: missing tsdev\n");
+               return;
+       }
+
+       in_register(IN_TSBUTTON_PREFIX "touchscreen as buttons",
+               pts_fd(dev), NULL, IN_TSBUTTON_COUNT, in_tsbutton_keys, 0);
+}
+
+static const char * const *
+in_tsbutton_get_key_names(int *count)
+{
+       *count = IN_TSBUTTON_COUNT;
+       return in_tsbutton_keys;
+}
+
+static int update_button(void)
+{
+       struct tsdev *dev = tsdev;
+       struct ts_sample sample;
+       int sx = 0, sy = 0, sp = 0, updated = 0;
+
+       if (dev == NULL)
+               return -1;
+
+       while (pts_read(dev, &sample, 1) > 0) {
+               sx = sample.x;
+               sy = sample.y;
+               sp = sample.pressure;
+               updated = 1;
+       }
+
+       if (updated) {
+               if (sp == 0)
+                       tsbutton_down_id = -1;
+               else {
+                       // 0 1
+                       // 2 3
+                       tsbutton_down_id = 0;
+                       if (sx > TS_WIDTH / 2)
+                               tsbutton_down_id++;
+                       if (sy > TS_HEIGHT / 2)
+                               tsbutton_down_id += 2;
+               }
+       }
+
+       return 0;
+}
+
+static int in_tsbutton_update(void *drv_data, const int *binds, int *result)
+{
+       int ret, t;
+       
+       ret = update_button();
+       if (ret != 0)
+               return ret;
+
+       if (tsbutton_down_id >= 0)
+               for (t = 0; t < IN_BINDTYPE_COUNT; t++)
+                       result[t] |= binds[IN_BIND_OFFS(tsbutton_down_id, t)];
+
+       return 0;
+}
+
+static int in_tsbutton_update_keycode(void *data, int *is_down)
+{
+       int ret, ret_kc = -1, ret_down = 0;
+
+       ret = update_button();
+       if (ret != 0)
+               return ret;
+
+       if (tsbutton_down_id == last_tsbutton_id)
+               return -1;
+
+       if (tsbutton_down_id >= 0) {
+               if (last_tsbutton_id >= 0) {
+                       ret_kc = last_tsbutton_id;
+                       last_tsbutton_id = -1;
+               }
+               else {
+                       ret_down = 1;
+                       ret_kc = tsbutton_down_id;
+                       last_tsbutton_id = tsbutton_down_id;
+               }
+       }
+       else {
+               ret_kc = last_tsbutton_id;
+               last_tsbutton_id = -1;
+       }
+
+       if (is_down != NULL)
+               *is_down = ret_down;
+
+       return ret_kc;
+}
+
+static const in_drv_t in_tsbutton_drv = {
+       .prefix         = IN_TSBUTTON_PREFIX,
+       .probe          = in_tsbutton_probe,
+       .get_key_names  = in_tsbutton_get_key_names,
+       .update         = in_tsbutton_update,
+       .update_keycode = in_tsbutton_update_keycode,
+};
+
+void in_tsbutton_init(void)
+{
+       tsbutton_down_id = last_tsbutton_id = -1;
+       in_register_driver(&in_tsbutton_drv);
+}
+