Initial gamecontroller support

3 files changed, 57 insertions, 1 deletions

diff --git a/sdl2/events.ha b/sdl2/events.ha
index 60ac771..e26333a 100644
--- a/sdl2/events.ha
+++ b/sdl2/events.ha
@@ -220,7 +220,7 @@ export type joy_device_event = struct {
 export type controller_axis_event = struct {
 	common_event,
 	which: i32, // TODO
-	axis: u8,
+	axis: controller_axis,
 	padding1: u8,
 	padding2: u8,
 	padding3: u8,
diff --git a/sdl2/gamecontroller.ha b/sdl2/gamecontroller.ha
new file mode 100644
index 0000000..3b752e1
--- /dev/null
+++ b/sdl2/gamecontroller.ha
@@ -0,0 +1,43 @@
+// TODO: Flesh me out
+
+// The gamecontroller structure used to identify an SDL game controller.
+// (Opaque)
+export type gamecontroller = void;
+
+// The list of axes available from a controller
+//
+// Thumbstick axis values range from [[JOYSTICK_AXIS_MIN]] to
+// [[JOYSTICK_AXIS_MAX]], and are centered within ~8000 of zero, though advanced
+// UI will allow users to set or autodetect the dead zone, which varies between
+// controllers.
+//
+// Trigger axis values range from 0 to [[JOYSTICK_AXIS_MAX]].
+export type controller_axis = enum u8 {
+    LEFTX,
+    LEFTY,
+    RIGHTX,
+    RIGHTY,
+    TRIGGERLEFT,
+    TRIGGERRIGHT,
+    INVALID = 255,
+};
+
+// Check if the given joystick is supported by the game controller interface.
+// 
+// 'joystick_index' is the same as the 'device_index' passed to
+// [[joystick_open]].
+// 
+// Returns SDL_TRUE if the given joystick is supported by the game controller
+// interface, SDL_FALSE if it isn't or it's an invalid index.
+export @symbol("SDL_IsGameController") fn is_game_controller(
+	joystick_index: int) bool;
+
+// Get the SDL_GameController associated with an instance id.
+//
+// Returns a [[controller]] on success or NULL on failure.
+export @symbol("SDL_GameControllerOpen") fn game_controller_open(
+	joystick_index: int) *gamecontroller;
+
+// Close a game controller previously opened with [[game_controller_open]].
+export @symbol("SDL_GameControllerClose") fn game_controller_close(
+	gamecontroller: *gamecontroller) void;
diff --git a/sdl2/joystick.ha b/sdl2/joystick.ha
new file mode 100644
index 0000000..c4f4c96
--- /dev/null
+++ b/sdl2/joystick.ha
@@ -0,0 +1,13 @@
+// TODO: Flesh me out
+
+// Minimum value for a joystick axis.
+export def JOYSTICK_AXIS_MIN: i16 = -32768;
+
+// Minimum value for a joystick axis.
+export def JOYSTICK_AXIS_MAX: i16 = 32767;
+
+// Count the number of joysticks attached to the system.
+//
+// Returns the number of attached joysticks on success or a negative error code
+// on failure.
+export @symbol("SDL_NumJoysticks") fn numjoysticks() int;