From 722d5509178fa5bdaa488fbbd9196f21377f8775 Mon Sep 17 00:00:00 2001
From: Ben Bridle <ben@derelict.engineering>
Date: Mon, 18 Nov 2024 14:57:19 +1300
Subject: Initial commit

---
 arm9/source/devices/input.c | 59 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 arm9/source/devices/input.c

(limited to 'arm9/source/devices/input.c')

diff --git a/arm9/source/devices/input.c b/arm9/source/devices/input.c
new file mode 100644
index 0000000..a39f448
--- /dev/null
+++ b/arm9/source/devices/input.c
@@ -0,0 +1,59 @@
+#include <nds.h>
+#include "../bang.h"
+#include "input.h"
+
+// Read gamepad state into an input device.
+void inp_read_gamepad(InputDevice *inp) {
+    u32 held = keysHeld();
+    u8 gamepad = (
+        TEST(held, KEY_UP)    << 7
+      | TEST(held, KEY_DOWN)  << 6
+      | TEST(held, KEY_LEFT)  << 5
+      | TEST(held, KEY_RIGHT) << 4
+      | TEST(held, KEY_A)     << 3
+      | TEST(held, KEY_B)     << 2
+      | TEST(held, KEY_X)     << 1
+      | TEST(held, KEY_Y)     << 0
+    );
+    if (gamepad != inp->gamepad) {
+        inp->wake = TRUE;
+        inp->gamepad = gamepad;
+    }
+}
+
+// Read navigation state into an input device.
+void inp_read_navigation(InputDevice *inp) {
+    u32 held = keysHeld();
+    u8 navigation = (
+        TEST(held, KEY_UP)    << 7
+      | TEST(held, KEY_DOWN)  << 6
+      | TEST(held, KEY_LEFT)  << 5
+      | TEST(held, KEY_RIGHT) << 4
+      | TEST(held, KEY_A)     << 3
+      | TEST(held, KEY_B)     << 2
+      | TEST(held, KEY_R)     << 1
+      | TEST(held, KEY_L)     << 0
+    );
+    if (navigation != inp->navigation) {
+        inp->wake = TRUE;
+        inp->navigation = navigation;
+    }
+}
+
+// Read touchscreen state into an input device.
+void inp_read_touch(InputDevice *inp) {
+    bool pointer = TEST(keysHeld(), KEY_TOUCH);
+    if (pointer != inp->pointer) {
+        inp->wake = TRUE;
+        inp->pointer = pointer;
+    }
+    if (pointer) {
+        touchPosition pos;
+        touchRead(&pos);
+        if (pos.px != inp->x || pos.py != inp->y) {
+            inp->wake = TRUE;
+            inp->x = pos.px;
+            inp->y = pos.py;
+        }
+    }
+}
-- 
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