From 1800240eb3154c5460907917ae3f4659002efc47 Mon Sep 17 00:00:00 2001 From: David Thompson Date: Fri, 30 Dec 2016 11:55:44 -0500 Subject: 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 --- sdl2/input/game-controller.scm | 155 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 155 insertions(+) create mode 100644 sdl2/input/game-controller.scm (limited to 'sdl2/input/game-controller.scm') diff --git a/sdl2/input/game-controller.scm b/sdl2/input/game-controller.scm new file mode 100644 index 0000000..66441a9 --- /dev/null +++ b/sdl2/input/game-controller.scm @@ -0,0 +1,155 @@ +;;; guile-sdl2 --- FFI bindings for SDL2 +;;; Copyright © 2016 David Thompson +;;; +;;; 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 +;;; . + +;;; 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? + wrap-game-controller unwrap-game-controller + (lambda (game-controller port) + (format port "#" + (game-controller-name game-controller)))) + +(define-record-type + (make-game-controller pointer joystick) + game-controller? + (pointer unwrap-game-controller) + (joystick %game-controller-joystick)) + +(set-record-type-printer! + (lambda (game-controller port) + (format port "#" + (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)) -- cgit v1.2.3