initial commit working tile demo

1 files changed, 45 insertions, 0 deletions

diff --git a/source/input.hpp b/source/input.hpp
new file mode 100644
index 0000000..2a2a3a2
--- /dev/null
+++ b/source/input.hpp
@@ -0,0 +1,45 @@
+#include "types.hpp"
+
+
+
+typedef u16 KeyFlags;
+
+enum Key : KeyFlags {
+	A      = 0x0001,
+	B      = 0x0002,
+	Select = 0x0004,
+	Start  = 0x0008,
+	Right  = 0x0010,
+	Left   = 0x0020,
+	Up     = 0x0040,
+	Down   = 0x0080,
+	R      = 0x0100,
+	L      = 0x0200,
+};
+
+constexpr KeyFlags KEY_MASK = 0x03FF;
+
+volatile KeyFlags* const REG_KEYINPUT = reinterpret_cast<volatile KeyFlags*>(0x04000130);
+
+static inline KeyFlags &keyflags_curr() {
+	static KeyFlags keybits_curr = 0;
+	return keybits_curr;
+}
+
+static inline KeyFlags &keyflags_prev() {
+	static KeyFlags keybits_prev = 0;
+	return keybits_prev;
+}
+
+static inline void keyflags_poll() {
+	KeyFlags &prev = keyflags_prev();
+	KeyFlags &curr = keyflags_curr();
+
+	prev = curr;
+	curr = ~*REG_KEYINPUT & KEY_MASK;
+}
+
+static inline bool key_is_down(Key key)  { return  keyflags_curr() & key; }
+static inline bool key_is_up(Key key)    { return ~keyflags_curr() & key; }
+static inline bool key_was_down(Key key) { return  keyflags_prev() & key; }
+static inline bool key_was_up(Key key)   { return ~keyflags_prev() & key; }