add guncon support

a bit basic but works

1 files changed, 68 insertions, 0 deletions

diff --git a/plugins/dfinput/guncon.c b/plugins/dfinput/guncon.c
new file mode 100644
index 0000000..b4f103c
--- /dev/null
+++ b/plugins/dfinput/guncon.c
@@ -0,0 +1,68 @@
+/*
+ * (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 <string.h>
+#include "main.h"
+
+static unsigned char buf[8];
+
+unsigned char PADpoll_guncon(unsigned char value)
+{
+	if (CurByte == 0) {
+		CurCmd = value;
+		CurByte++;
+		return 0x63;	// regardless of cmd
+	}
+
+	if (CurCmd != 0x42 || CurByte >= 8)
+		return 0xff;	// verified
+
+	return buf[CurByte++];
+}
+
+unsigned char PADstartPoll_guncon(int pad)
+{
+	int x, xn = 0, y = 0, in = 0, xres = 256;
+	CurByte = 0;
+
+	buf[2] = buf[3] = 0xff;
+	pl_update_gun(&xn, &xres, &y, &in);
+
+	// while y = const + line counter, what is x?
+	// for 256 mode, hw dumped offsets x, y: 0x5a, 0x20
+	//x = 0x5a + (356 * xn >> 10);
+	x = 0x5a - (xres - 256) / 3 + (((xres - 256) / 3 + 356) * xn >> 10);
+	y = 0x20 + y;
+
+	if (in & GUNIN_TRIGGER)
+		buf[3] &= ~0x20;
+	if (in & GUNIN_BTNA)
+		buf[2] &= ~0x08;
+	if (in & GUNIN_BTNB)
+		buf[3] &= ~0x40;
+	if (in & GUNIN_TRIGGER2) {
+		buf[3] &= ~0x20;
+		x = 1;
+		y = 10;
+	}
+	buf[4] = x;
+	buf[5] = x >> 8;
+	buf[6] = y;
+	buf[7] = y >> 8;
+
+	return 0xff;
+}
+
+void guncon_init(void)
+{
+	memset(buf, 0xff, sizeof(buf));
+	buf[1] = 0x5a;
+}
+