made work in emscripten

include/gamepad.h

@@ -3,6 +3,38 @@
 
 #include "types.h"
 
+#ifdef __EMSCRIPTEN__
+
+#define SW_MAX_GAMEPADS 1
+#define SW_MAX_GAMEPAD_AXES 6
+#define SW_MAX_GAMEPAD_BUTTONS 16
+
+#define SW_GAMEPAD_BUTTON_FACE_DOWN 0
+#define SW_GAMEPAD_BUTTON_FACE_RIGHT 1
+#define SW_GAMEPAD_BUTTON_FACE_LEFT 2
+#define SW_GAMEPAD_BUTTON_FACE_UP 3
+#define SW_GAMEPAD_BUTTON_LEFT_SHOULDER 4
+#define SW_GAMEPAD_BUTTON_RIGHT_SHOULDER 5
+#define SW_GAMEPAD_BUTTON_LEFT_TRIGGER 6
+#define SW_GAMEPAD_BUTTON_RIGHT_TRIGGER 7
+#define SW_GAMEPAD_BUTTON_BACK 8
+#define SW_GAMEPAD_BUTTON_START 9
+#define SW_GAMEPAD_BUTTON_LEFT_STICK 11
+#define SW_GAMEPAD_BUTTON_RIGHT_STICK 10
+#define SW_GAMEPAD_BUTTON_DPAD_UP 12
+#define SW_GAMEPAD_BUTTON_DPAD_RIGHT 15
+#define SW_GAMEPAD_BUTTON_DPAD_DOWN 13
+#define SW_GAMEPAD_BUTTON_DPAD_LEFT 14
+
+#define SW_GAMEPAD_AXIS_LEFT_X 0
+#define SW_GAMEPAD_AXIS_RIGHT_X 1
+#define SW_GAMEPAD_AXIS_LEFT_Y 2
+#define SW_GAMEPAD_AXIS_RIGHT_Y 3
+#define SW_GAMEPAD_AXIS_LEFT_TRIGGER 4
+#define SW_GAMEPAD_AXIS_RIGHT_TRIGGER 5
+
+#else /* __EMSCRIPTEN__ */
+
 #define SW_MAX_GAMEPADS 4
 #define SW_MAX_GAMEPAD_AXES 6
 #define SW_MAX_GAMEPAD_BUTTONS 15
@@ -30,6 +62,8 @@
 #define SW_GAMEPAD_AXIS_LEFT_TRIGGER 4
 #define SW_GAMEPAD_AXIS_RIGHT_TRIGGER 5
 
+#endif /* __EMSCRIPTEN__ */
+
 struct sw_gamepad {
 	f32 axes[SW_MAX_GAMEPAD_AXES];
 	bool button_down[SW_MAX_GAMEPAD_BUTTONS];

src/gamepad.c

@@ -10,6 +10,31 @@ void sw_gamepad_static_init() {
 }
 
 void sw_gamepad_tick() {
+#ifdef __EMSCRIPTEN__
+	i32 i, j, count;
+	const f32 *axes;
+	const unsigned char *buttons;
+
+	for(i = 0; i < SW_MAX_GAMEPADS; ++i) {
+		if(glfwJoystickPresent(i)) {
+			axes = glfwGetJoystickAxes(i, &count);
+			count = i32_min(count, SW_MAX_GAMEPAD_AXES);
+
+			for(j = 0; j < count; ++j) {
+				sw_gamepads[i].axes[j] = axes[j];
+			}
+
+			buttons = glfwGetJoystickButtons(i, &count);
+			count = i32_min(count, SW_MAX_GAMEPAD_BUTTONS);
+
+			for(j = 0; j < SW_MAX_GAMEPAD_BUTTONS; ++j) {
+				sw_gamepads[i].button_pressed[j] =
+				    !sw_gamepads[i].button_pressed[j] && buttons[j];
+				sw_gamepads[i].button_down[j] = buttons[j];
+			}
+		}
+	}
+#else  /* __EMSCRIPTEN__ */
 	i32 i, j;
 	GLFWgamepadstate state;
 
@@ -26,4 +51,5 @@ void sw_gamepad_tick() {
 			}
 		}
 	}
+#endif /* __EMSCRIPTEN__ */
 }