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authorDavid Thompson <dthompson@vistahigherlearning.com>2016-12-30 11:55:44 -0500
committerDavid Thompson <dthompson2@worcester.edu>2016-12-31 13:31:18 -0500
commit1800240eb3154c5460907917ae3f4659002efc47 (patch)
tree3cc5f5365d34fb441a3ab00e6698201abaf57bda /sdl2/input/game-controller.scm
parentb833f588b3d9528e7fc650d841ee7a46b6c0ba78 (diff)
Add bindings for game controller input.
* sdl2.scm (%default-init-flags): Add 'joystick' to default flags. (sdl-init): Translate to 'joystick' to SDL2 init bit flag. * sdl2/bindings.scm (SDL_INIT_JOYSTICK, SDL_JOYSTICK_POWER_UNKNOWN, SDL_JOYSTICK_POWER_EMPTY, SDL_JOYSTICK_POWER_LOW, SDL_JOYSTICK_POWER_MEDIUM, SDL_JOYSTICK_POWER_FULL, SDL_JOYSTICK_POWER_WIRED, SDL_JOYSTICK_POWER_MAX, SDL_CONTROLLER_AXIS_INVALID, SDL_CONTROLLER_AXIS_LEFTX, SDL_CONTROLLER_AXIS_LEFTY, SDL_CONTROLLER_AXIS_RIGHTX, SDL_CONTROLLER_AXIS_RIGHTY, SDL_CONTROLLER_AXIS_TRIGGERLEFT, SDL_CONTROLLER_AXIS_TRIGGERRIGHT, SDL_CONTROLLER_AXIS_MAX, SDL_CONTROLLER_BUTTON_INVALID, SDL_CONTROLLER_BUTTON_A, SDL_CONTROLLER_BUTTON_B, SDL_CONTROLLER_BUTTON_X, SDL_CONTROLLER_BUTTON_Y, SDL_CONTROLLER_BUTTON_BACK, SDL_CONTROLLER_BUTTON_GUIDE, SDL_CONTROLLER_BUTTON_START, SDL_CONTROLLER_BUTTON_LEFTSTICK, SDL_CONTROLLER_BUTTON_RIGHTSTICK, SDL_CONTROLLER_BUTTON_LEFTSHOULDER, SDL_CONTROLLER_BUTTON_RIGHTSHOULDER, SDL_CONTROLLER_BUTTON_DPAD_UP, SDL_CONTROLLER_BUTTON_DPAD_DOWN, SDL_CONTROLLER_BUTTON_DPAD_LEFT, SDL_CONTROLLER_BUTTON_DPAD_RIGHT, SDL_CONTROLLER_BUTTON_MAX): New variables. (sdl-joystick-open, sdl-joystick-close, sdl-joystick-current-power-level, sdl-joystick-event-state, sdl-joystick-from-instance-id, sdl-joystick-get-attached, sdl-joystick-get-axis, sdl-joystick-get-ball, sdl-joystick-get-button, sdl-joystick-get-device-guid, sdl-joystick-get-guide, sdl-joystick-get-guid-from-string, sdl-joystick-get-guid-string, sdl-joystick-get-hat, sdl-joystick-instance-id, sdl-joystick-name, sdl-joystick-name-for-index, sdl-joystick-num-axes, sdl-joystick-num-balls, sdl-joystick-num-buttons, sdl-joystick-num-hats, sdl-num-joysticks, sdl-joystick-update, sdl-game-controller-add-mapping, sdl-game-controller-open, sdl-game-controller-close, sdl-game-controller-event-state, sdl-game-controller-from-instance-id, sdl-game-controller-get-attached, sdl-game-controller-get-axis, sdl-game-controller-get-axis-from-string, sdl-game-controller-get-string-from-axis, sdl-game-controller-get-string-for-axis, sdl-game-controller-get-button, sdl-game-controller-get-button-from-string, sdl-game-controller-get-string-from-button, sdl-game-controller-get-joystick, sdl-game-controller-mapping, sdl-game-controller-mapping-for-guid, sdl-game-controller-name, sdl-game-controller-name-for-index, sdl-game-controller-update, sdl-is-game-controller): New procedures. * sdl2/events.scm (make-joystick-ball-event, joystick-ball-event?, joystick-ball-event-timestamp, joystick-ball-event-which, joystick-ball-event-ball, joystick-ball-event-x-rel, joystick-ball-event-y-rel, make-joystick-hat-event, joystick-hat-event?, joystick-hat-event-timestamp, joystick-hat-event-which, joystick-hat-event-hat, joystick-hat-event-value, make-joystick-device-event, joystick-device-event?, joystick-device-event-timestamp, joystick-device-event-which, joystick-device-event-action, make-controller-axis-event, controller-axis-event?, controller-axis-event-timestamp, controller-axis-event-which, controller-axis-event-axis, controller-axis-event-value, make-controller-button-event, controller-button-event?, controller-button-down-event?, controller-button-up-event?, controller-button-event-timestamp, controller-button-event-which, controller-button-event-button, controller-button-event-pressed?, make-controller-device-event, controller-device-event?, controller-device-event-timestamp, controller-device-event-which, controller-device-event-action, parse-joystick-ball-event, parse-joystick-hat-event, parse-joystick-device-event, parse-controller-axis-event, parse-controller-button-event, parse-controller-device-event): New procedures. (poll-event): Parse joystick/controller events. * sdl2/input/joystick.scm: New file. * sdl2/input/game-controller.scm: New file. * Makefile.am (SOURCES): Add them
Diffstat (limited to 'sdl2/input/game-controller.scm')
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diff --git a/sdl2/input/game-controller.scm b/sdl2/input/game-controller.scm
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+;;; guile-sdl2 --- FFI bindings for SDL2
+;;; Copyright © 2016 David Thompson <davet@gnu.org>
+;;;
+;;; This file is part of guile-sdl2.
+;;;
+;;; Guile-sdl2 is free software; you can redistribute it and/or modify
+;;; it under the terms of the GNU Lesser General Public License as
+;;; published by the Free Software Foundation; either version 3 of the
+;;; License, or (at your option) any later version.
+;;;
+;;; Guile-sdl2 is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+;;; General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU Lesser General Public
+;;; License along with guile-sdl2. If not, see
+;;; <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+;;
+;; Joystick input.
+;;
+;;; Code:
+
+(define-module (sdl2 input game-controller)
+ #:use-module (ice-9 match)
+ #:use-module (srfi srfi-9)
+ #:use-module (srfi srfi-9 gnu)
+ #:use-module (system foreign)
+ #:use-module ((sdl2 bindings) #:prefix ffi:)
+ #:use-module (sdl2)
+ #:export (open-game-controller
+ close-game-controller
+ game-controller?
+ game-controller-attached?
+ game-controller-joystick
+ game-controller-name
+ game-controller-axis
+ game-controller-button-pressed?
+ game-controller-index?))
+
+(define-wrapped-pointer-type <game-controller>
+ game-controller?
+ wrap-game-controller unwrap-game-controller
+ (lambda (game-controller port)
+ (format port "#<game-controller ~a>"
+ (game-controller-name game-controller))))
+
+(define-record-type <game-controller>
+ (make-game-controller pointer joystick)
+ game-controller?
+ (pointer unwrap-game-controller)
+ (joystick %game-controller-joystick))
+
+(set-record-type-printer! <game-controller>
+ (lambda (game-controller port)
+ (format port "#<game-controller ~s>"
+ (game-controller-name game-controller))))
+
+(define wrap-joystick (@@ (sdl2 input joystick) wrap-joystick))
+
+(define (open-game-controller joystick-index)
+ "Return a game controller object for the physical joystick device
+associated with ."
+ (let ((ptr (ffi:sdl-game-controller-open joystick-index)))
+ (if (null-pointer? ptr)
+ (sdl-error "open-game-controller" "failed to open game controller")
+ (let ((joystick (wrap-joystick
+ (ffi:sdl-game-controller-get-joystick ptr))))
+ (make-game-controller ptr joystick)))))
+
+(define (close-game-controller controller)
+ "Close CONTROLLER."
+ (ffi:sdl-game-controller-close (unwrap-game-controller controller)))
+
+(define (game-controller-joystick controller)
+ "Return the underlying joystick object associated with CONTROLLER."
+ (%game-controller-joystick controller))
+
+(define (game-controller-attached? controller)
+ "Return #t if CONTROLLER is currently in use."
+ (= (ffi:sdl-game-controller-get-attached (unwrap-game-controller controller)) 1))
+
+(define (game-controller-name controller)
+ "Return the human readable name for CONTROLLER."
+ (pointer->string (ffi:sdl-game-controller-name (unwrap-game-controller controller))))
+
+(define (axis-symbol->int axis)
+ (match axis
+ ('left-x ffi:SDL_CONTROLLER_AXIS_LEFTX)
+ ('left-y ffi:SDL_CONTROLLER_AXIS_LEFTY)
+ ('right-x ffi:SDL_CONTROLLER_AXIS_RIGHTX)
+ ('right-x ffi:SDL_CONTROLLER_AXIS_RIGHTY)
+ ('trigger-left ffi:SDL_CONTROLLER_AXIS_TRIGGERLEFT)
+ ('trigger-right ffi:SDL_CONTROLLER_AXIS_TRIGGERRIGHT)))
+
+(define (game-controller-axis controller axis)
+ "Return a number in the range [-32768, 32767] representing the
+current state of AXIS on CONTROLLER.
+
+AXIS may be one of the following symbols:
+- left-x
+- left-y
+- right-x
+- right-y
+- trigger-left
+- trigger-right"
+ (ffi:sdl-game-controller-get-axis (unwrap-game-controller controller)
+ (axis-symbol->int axis)))
+
+(define (button-symbol->int button)
+ (match button
+ ('a ffi:SDL_CONTROLLER_BUTTON_A)
+ ('b ffi:SDL_CONTROLLER_BUTTON_B)
+ ('x ffi:SDL_CONTROLLER_BUTTON_X)
+ ('y ffi:SDL_CONTROLLER_BUTTON_Y)
+ ('back ffi:SDL_CONTROLLER_BUTTON_BACK)
+ ('guide ffi:SDL_CONTROLLER_BUTTON_GUIDE)
+ ('start ffi:SDL_CONTROLLER_BUTTON_START)
+ ('left-stick ffi:SDL_CONTROLLER_BUTTON_LEFTSTICK)
+ ('right-stick ffi:SDL_CONTROLLER_BUTTON_RIGHTSTICK)
+ ('left-shoulder ffi:SDL_CONTROLLER_BUTTON_LEFTSHOULDER)
+ ('right-shoulder ffi:SDL_CONTROLLER_BUTTON_RIGHTSHOULDER)
+ ('dpad-up ffi:SDL_CONTROLLER_BUTTON_DPAD_UP)
+ ('dpad-down ffi:SDL_CONTROLLER_BUTTON_DPAD_DOWN)
+ ('dpad-left ffi:SDL_CONTROLLER_BUTTON_DPAD_LEFT)
+ ('dpad-right ffi:SDL_CONTROLLER_BUTTON_DPAD_RIGHT)))
+
+(define (game-controller-button-pressed? controller button)
+ "Return #t if BUTTON is pressed on CONTROLLER.
+
+BUTTON may be one of the following symbols:
+- a
+- b
+- x
+- y
+- back
+- guide
+- start
+- left-stick
+- right-stick
+- left-shoulder
+- right-shoulder
+- dpad-up
+- dpad-down
+- dpad-left
+- dpad-right"
+ (= (ffi:sdl-game-controller-get-button (unwrap-game-controller controller)
+ (button-symbol->int button))
+ 1))
+
+(define (game-controller-index? joystick-index)
+ "Return #t if JOYSTICK-INDEX is a valid game controller index."
+ (= (ffi:sdl-is-game-controller joystick-index) 1))