src/joystick/SDL_gamecontroller.c
author Sam Lantinga <slouken@libsdl.org>
Thu, 10 Nov 2016 17:19:34 -0800
changeset 10595 9da2701eeb4a
parent 10495 f732781d7ddc
child 10602 20855a38e048
permissions -rw-r--r--
Standardized the format of the SDL joystick GUID and added functions to retrieve the USB VID/PID from a joystick and game controller.
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/*
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  Simple DirectMedia Layer
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  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
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  This software is provided 'as-is', without any express or implied
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  warranty.  In no event will the authors be held liable for any damages
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  arising from the use of this software.
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  Permission is granted to anyone to use this software for any purpose,
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  including commercial applications, and to alter it and redistribute it
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  freely, subject to the following restrictions:
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  1. The origin of this software must not be misrepresented; you must not
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     claim that you wrote the original software. If you use this software
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     in a product, an acknowledgment in the product documentation would be
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     appreciated but is not required.
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  2. Altered source versions must be plainly marked as such, and must not be
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     misrepresented as being the original software.
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  3. This notice may not be removed or altered from any source distribution.
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*/
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#include "../SDL_internal.h"
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/* This is the game controller API for Simple DirectMedia Layer */
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#include "SDL_events.h"
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#include "SDL_assert.h"
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#include "SDL_sysjoystick.h"
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#include "SDL_hints.h"
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#include "SDL_gamecontrollerdb.h"
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#if !SDL_EVENTS_DISABLED
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#include "../events/SDL_events_c.h"
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#endif
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#define ABS(_x) ((_x) < 0 ? -(_x) : (_x))
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#define SDL_CONTROLLER_PLATFORM_FIELD "platform:"
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/* a list of currently opened game controllers */
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static SDL_GameController *SDL_gamecontrollers = NULL;
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/* keep track of the hat and mask value that transforms this hat movement into a button/axis press */
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struct _SDL_HatMapping
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{
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    int hat;
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    Uint8 mask;
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};
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/* We need 36 entries for Android (as of SDL v2.0.4) */
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#define k_nMaxReverseEntries 48
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/**
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 * We are encoding the "HAT" as 0xhm. where h == hat ID and m == mask
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 * MAX 4 hats supported
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 */
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#define k_nMaxHatEntries 0x3f + 1
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/* our in memory mapping db between joystick objects and controller mappings */
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struct _SDL_ControllerMapping
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{
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    SDL_JoystickGUID guid;
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    const char *name;
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    /* mapping of axis/button id to controller version */
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    int axes[SDL_CONTROLLER_AXIS_MAX];
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    int buttonasaxis[SDL_CONTROLLER_AXIS_MAX];
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    int buttons[SDL_CONTROLLER_BUTTON_MAX];
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    int axesasbutton[SDL_CONTROLLER_BUTTON_MAX];
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    struct _SDL_HatMapping hatasbutton[SDL_CONTROLLER_BUTTON_MAX];
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    /* reverse mapping, joystick indices to buttons */
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    SDL_GameControllerAxis raxes[k_nMaxReverseEntries];
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    SDL_GameControllerAxis rbuttonasaxis[k_nMaxReverseEntries];
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    SDL_GameControllerButton rbuttons[k_nMaxReverseEntries];
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    SDL_GameControllerButton raxesasbutton[k_nMaxReverseEntries];
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    SDL_GameControllerButton rhatasbutton[k_nMaxHatEntries];
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};
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/* our hard coded list of mapping support */
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typedef struct _ControllerMapping_t
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{
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    SDL_JoystickGUID guid;
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    char *name;
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    char *mapping;
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    struct _ControllerMapping_t *next;
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} ControllerMapping_t;
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static ControllerMapping_t *s_pSupportedControllers = NULL;
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static ControllerMapping_t *s_pXInputMapping = NULL;
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static ControllerMapping_t *s_pEmscriptenMapping = NULL;
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/* The SDL game controller structure */
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struct _SDL_GameController
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{
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    SDL_Joystick *joystick; /* underlying joystick device */
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    int ref_count;
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    Uint8 hatState[4]; /* the current hat state for this controller */
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    struct _SDL_ControllerMapping mapping; /* the mapping object for this controller */
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    struct _SDL_GameController *next; /* pointer to next game controller we have allocated */
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};
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int SDL_PrivateGameControllerAxis(SDL_GameController * gamecontroller, SDL_GameControllerAxis axis, Sint16 value);
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int SDL_PrivateGameControllerButton(SDL_GameController * gamecontroller, SDL_GameControllerButton button, Uint8 state);
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/*
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 * If there is an existing add event in the queue, it needs to be modified
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 * to have the right value for which, because the number of controllers in
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 * the system is now one less.
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 */
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static void UpdateEventsForDeviceRemoval()
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{
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    int i, num_events;
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    SDL_Event *events;
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    num_events = SDL_PeepEvents(NULL, 0, SDL_PEEKEVENT, SDL_CONTROLLERDEVICEADDED, SDL_CONTROLLERDEVICEADDED);
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    if (num_events <= 0) {
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        return;
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    }
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    events = SDL_stack_alloc(SDL_Event, num_events);
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    if (!events) {
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        return;
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    }
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    num_events = SDL_PeepEvents(events, num_events, SDL_GETEVENT, SDL_CONTROLLERDEVICEADDED, SDL_CONTROLLERDEVICEADDED);
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    for (i = 0; i < num_events; ++i) {
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        --events[i].cdevice.which;
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    }
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    SDL_PeepEvents(events, num_events, SDL_ADDEVENT, 0, 0);
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    SDL_stack_free(events);
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}
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/*
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 * Event filter to fire controller events from joystick ones
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 */
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int SDL_GameControllerEventWatcher(void *userdata, SDL_Event * event)
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{
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    switch(event->type) {
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    case SDL_JOYAXISMOTION:
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        {
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            SDL_GameController *controllerlist;
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            if (event->jaxis.axis >= k_nMaxReverseEntries)
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            {
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                SDL_SetError("SDL_GameControllerEventWatcher: Axis index %d too large, ignoring motion", (int)event->jaxis.axis);
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                break;
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            }
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            controllerlist = SDL_gamecontrollers;
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            while (controllerlist) {
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                if (controllerlist->joystick->instance_id == event->jaxis.which) {
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                    if (controllerlist->mapping.raxes[event->jaxis.axis] >= 0) /* simple axis to axis, send it through */ {
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                        SDL_GameControllerAxis axis = controllerlist->mapping.raxes[event->jaxis.axis];
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                        Sint16 value = event->jaxis.value;
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                        switch (axis) {
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                            case SDL_CONTROLLER_AXIS_TRIGGERLEFT:
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                            case SDL_CONTROLLER_AXIS_TRIGGERRIGHT:
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                                value = value / 2 + 16384;
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                                break;
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                            default:
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                                break;
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                        }
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                        SDL_PrivateGameControllerAxis(controllerlist, axis, value);
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                    } else if (controllerlist->mapping.raxesasbutton[event->jaxis.axis] >= 0) { /* simulate an axis as a button */
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                        SDL_PrivateGameControllerButton(controllerlist, controllerlist->mapping.raxesasbutton[event->jaxis.axis], ABS(event->jaxis.value) > 32768/2 ? SDL_PRESSED : SDL_RELEASED);
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                    }
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                    break;
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                }
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                controllerlist = controllerlist->next;
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            }
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        }
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        break;
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    case SDL_JOYBUTTONDOWN:
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    case SDL_JOYBUTTONUP:
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        {
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            SDL_GameController *controllerlist;
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            if (event->jbutton.button >= k_nMaxReverseEntries)
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            {
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                SDL_SetError("SDL_GameControllerEventWatcher: Button index %d too large, ignoring update", (int)event->jbutton.button);
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                break;
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            }
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            controllerlist = SDL_gamecontrollers;
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            while (controllerlist) {
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                if (controllerlist->joystick->instance_id == event->jbutton.which) {
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                    if (controllerlist->mapping.rbuttons[event->jbutton.button] >= 0) { /* simple button as button */
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                        SDL_PrivateGameControllerButton(controllerlist, controllerlist->mapping.rbuttons[event->jbutton.button], event->jbutton.state);
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                    } else if (controllerlist->mapping.rbuttonasaxis[event->jbutton.button] >= 0) { /* an button pretending to be an axis */
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                        SDL_PrivateGameControllerAxis(controllerlist, controllerlist->mapping.rbuttonasaxis[event->jbutton.button], event->jbutton.state > 0 ? 32767 : 0);
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                    }
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                    break;
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                }
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                controllerlist = controllerlist->next;
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            }
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        }
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        break;
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    case SDL_JOYHATMOTION:
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        {
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            SDL_GameController *controllerlist;
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            if (event->jhat.hat >= 4) break;
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            controllerlist = SDL_gamecontrollers;
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            while (controllerlist) {
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                if (controllerlist->joystick->instance_id == event->jhat.which) {
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                    Uint8 bSame = controllerlist->hatState[event->jhat.hat] & event->jhat.value;
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                    /* Get list of removed bits (button release) */
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                    Uint8 bChanged = controllerlist->hatState[event->jhat.hat] ^ bSame;
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                    /* the hat idx in the high nibble */
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                    int bHighHat = event->jhat.hat << 4;
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                    if (bChanged & SDL_HAT_DOWN)
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                        SDL_PrivateGameControllerButton(controllerlist, controllerlist->mapping.rhatasbutton[bHighHat | SDL_HAT_DOWN], SDL_RELEASED);
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                    if (bChanged & SDL_HAT_UP)
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                        SDL_PrivateGameControllerButton(controllerlist, controllerlist->mapping.rhatasbutton[bHighHat | SDL_HAT_UP], SDL_RELEASED);
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                    if (bChanged & SDL_HAT_LEFT)
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                        SDL_PrivateGameControllerButton(controllerlist, controllerlist->mapping.rhatasbutton[bHighHat | SDL_HAT_LEFT], SDL_RELEASED);
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                    if (bChanged & SDL_HAT_RIGHT)
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                        SDL_PrivateGameControllerButton(controllerlist, controllerlist->mapping.rhatasbutton[bHighHat | SDL_HAT_RIGHT], SDL_RELEASED);
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                    /* Get list of added bits (button press) */
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                    bChanged = event->jhat.value ^ bSame;
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                    if (bChanged & SDL_HAT_DOWN)
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                        SDL_PrivateGameControllerButton(controllerlist, controllerlist->mapping.rhatasbutton[bHighHat | SDL_HAT_DOWN], SDL_PRESSED);
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                    if (bChanged & SDL_HAT_UP)
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                        SDL_PrivateGameControllerButton(controllerlist, controllerlist->mapping.rhatasbutton[bHighHat | SDL_HAT_UP], SDL_PRESSED);
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                    if (bChanged & SDL_HAT_LEFT)
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                        SDL_PrivateGameControllerButton(controllerlist, controllerlist->mapping.rhatasbutton[bHighHat | SDL_HAT_LEFT], SDL_PRESSED);
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                    if (bChanged & SDL_HAT_RIGHT)
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                        SDL_PrivateGameControllerButton(controllerlist, controllerlist->mapping.rhatasbutton[bHighHat | SDL_HAT_RIGHT], SDL_PRESSED);
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                    /* update our state cache */
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                    controllerlist->hatState[event->jhat.hat] = event->jhat.value;
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                    break;
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                }
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                controllerlist = controllerlist->next;
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            }
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        }
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        break;
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    case SDL_JOYDEVICEADDED:
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        {
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            if (SDL_IsGameController(event->jdevice.which)) {
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                SDL_Event deviceevent;
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                deviceevent.type = SDL_CONTROLLERDEVICEADDED;
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                deviceevent.cdevice.which = event->jdevice.which;
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                SDL_PushEvent(&deviceevent);
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            }
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        }
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        break;
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    case SDL_JOYDEVICEREMOVED:
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        {
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            SDL_GameController *controllerlist = SDL_gamecontrollers;
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            while (controllerlist) {
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                if (controllerlist->joystick->instance_id == event->jdevice.which) {
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                    SDL_Event deviceevent;
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                    deviceevent.type = SDL_CONTROLLERDEVICEREMOVED;
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                    deviceevent.cdevice.which = event->jdevice.which;
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                    SDL_PushEvent(&deviceevent);
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                    UpdateEventsForDeviceRemoval();
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                    break;
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                }
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                controllerlist = controllerlist->next;
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            }
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        }
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        break;
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    default:
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        break;
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    }
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    return 1;
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}
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/*
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 * Helper function to scan the mappings database for a controller with the specified GUID
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 */
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ControllerMapping_t *SDL_PrivateGetControllerMappingForGUID(SDL_JoystickGUID *guid)
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{
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    ControllerMapping_t *pSupportedController = s_pSupportedControllers;
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    while (pSupportedController) {
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        if (SDL_memcmp(guid, &pSupportedController->guid, sizeof(*guid)) == 0) {
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            return pSupportedController;
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        }
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        pSupportedController = pSupportedController->next;
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    }
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    return NULL;
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}
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static const char* map_StringForControllerAxis[] = {
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    "leftx",
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    "lefty",
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    "rightx",
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    "righty",
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    "lefttrigger",
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    "righttrigger",
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    NULL
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};
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/*
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 * convert a string to its enum equivalent
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 */
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SDL_GameControllerAxis SDL_GameControllerGetAxisFromString(const char *pchString)
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{
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    int entry;
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    if (!pchString || !pchString[0])
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        return SDL_CONTROLLER_AXIS_INVALID;
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    for (entry = 0; map_StringForControllerAxis[entry]; ++entry) {
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        if (!SDL_strcasecmp(pchString, map_StringForControllerAxis[entry]))
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            return entry;
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    }
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    return SDL_CONTROLLER_AXIS_INVALID;
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}
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/*
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 * convert an enum to its string equivalent
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 */
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const char* SDL_GameControllerGetStringForAxis(SDL_GameControllerAxis axis)
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{
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    if (axis > SDL_CONTROLLER_AXIS_INVALID && axis < SDL_CONTROLLER_AXIS_MAX) {
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        return map_StringForControllerAxis[axis];
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    }
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    return NULL;
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}
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static const char* map_StringForControllerButton[] = {
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    "a",
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    "b",
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    "x",
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    "y",
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    "back",
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    "guide",
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    "start",
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    "leftstick",
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    "rightstick",
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    "leftshoulder",
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    "rightshoulder",
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    "dpup",
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    "dpdown",
slouken@8582
   349
    "dpleft",
slouken@8582
   350
    "dpright",
slouken@8582
   351
    NULL
slouken@8582
   352
};
slouken@8582
   353
slouken@8582
   354
/*
slouken@8582
   355
 * convert a string to its enum equivalent
slouken@8582
   356
 */
slouken@8772
   357
SDL_GameControllerButton SDL_GameControllerGetButtonFromString(const char *pchString)
slouken@8582
   358
{
slouken@8582
   359
    int entry;
slouken@8772
   360
    if (!pchString || !pchString[0])
slouken@8582
   361
        return SDL_CONTROLLER_BUTTON_INVALID;
slouken@8582
   362
slouken@8772
   363
    for (entry = 0; map_StringForControllerButton[entry]; ++entry) {
slouken@8772
   364
        if (SDL_strcasecmp(pchString, map_StringForControllerButton[entry]) == 0)
slouken@8772
   365
            return entry;
slouken@8582
   366
    }
slouken@8582
   367
    return SDL_CONTROLLER_BUTTON_INVALID;
slouken@8582
   368
}
slouken@8582
   369
slouken@8582
   370
/*
slouken@8582
   371
 * convert an enum to its string equivalent
slouken@8582
   372
 */
slouken@8772
   373
const char* SDL_GameControllerGetStringForButton(SDL_GameControllerButton axis)
slouken@8582
   374
{
slouken@8772
   375
    if (axis > SDL_CONTROLLER_BUTTON_INVALID && axis < SDL_CONTROLLER_BUTTON_MAX) {
slouken@8582
   376
        return map_StringForControllerButton[axis];
slouken@8582
   377
    }
slouken@8582
   378
    return NULL;
slouken@8582
   379
}
slouken@8582
   380
slouken@8582
   381
/*
slouken@8582
   382
 * given a controller button name and a joystick name update our mapping structure with it
slouken@8582
   383
 */
slouken@8772
   384
void SDL_PrivateGameControllerParseButton(const char *szGameButton, const char *szJoystickButton, struct _SDL_ControllerMapping *pMapping)
slouken@8582
   385
{
slouken@8582
   386
    int iSDLButton = 0;
slouken@8582
   387
    SDL_GameControllerButton button;
slouken@8582
   388
    SDL_GameControllerAxis axis;
slouken@8772
   389
    button = SDL_GameControllerGetButtonFromString(szGameButton);
slouken@8772
   390
    axis = SDL_GameControllerGetAxisFromString(szGameButton);
slouken@8772
   391
    iSDLButton = SDL_atoi(&szJoystickButton[1]);
slouken@8582
   392
slouken@8772
   393
    if (szJoystickButton[0] == 'a') {
slouken@8772
   394
        if (iSDLButton >= k_nMaxReverseEntries) {
slouken@8772
   395
            SDL_SetError("Axis index too large: %d", iSDLButton);
slouken@8582
   396
            return;
slouken@8582
   397
        }
slouken@8772
   398
        if (axis != SDL_CONTROLLER_AXIS_INVALID) {
slouken@8582
   399
            pMapping->axes[ axis ] = iSDLButton;
slouken@8582
   400
            pMapping->raxes[ iSDLButton ] = axis;
slouken@8772
   401
        } else if (button != SDL_CONTROLLER_BUTTON_INVALID) {
slouken@8582
   402
            pMapping->axesasbutton[ button ] = iSDLButton;
slouken@8582
   403
            pMapping->raxesasbutton[ iSDLButton ] = button;
slouken@8772
   404
        } else {
slouken@8772
   405
            SDL_assert(!"How did we get here?");
slouken@8582
   406
        }
slouken@8582
   407
slouken@8772
   408
    } else if (szJoystickButton[0] == 'b') {
slouken@8772
   409
        if (iSDLButton >= k_nMaxReverseEntries) {
slouken@8772
   410
            SDL_SetError("Button index too large: %d", iSDLButton);
slouken@8582
   411
            return;
slouken@8582
   412
        }
slouken@8772
   413
        if (button != SDL_CONTROLLER_BUTTON_INVALID) {
slouken@8582
   414
            pMapping->buttons[ button ] = iSDLButton;
slouken@8582
   415
            pMapping->rbuttons[ iSDLButton ] = button;
slouken@8772
   416
        } else if (axis != SDL_CONTROLLER_AXIS_INVALID) {
slouken@8582
   417
            pMapping->buttonasaxis[ axis ] = iSDLButton;
slouken@8582
   418
            pMapping->rbuttonasaxis[ iSDLButton ] = axis;
slouken@8772
   419
        } else {
slouken@8772
   420
            SDL_assert(!"How did we get here?");
slouken@8582
   421
        }
slouken@8772
   422
    } else if (szJoystickButton[0] == 'h') {
slouken@8772
   423
        int hat = SDL_atoi(&szJoystickButton[1]);
slouken@8772
   424
        int mask = SDL_atoi(&szJoystickButton[3]);
slouken@8582
   425
        if (hat >= 4) {
slouken@8772
   426
            SDL_SetError("Hat index too large: %d", iSDLButton);
slouken@8582
   427
        }
slouken@8582
   428
slouken@8772
   429
        if (button != SDL_CONTROLLER_BUTTON_INVALID) {
slouken@8582
   430
            int ridx;
slouken@8582
   431
            pMapping->hatasbutton[ button ].hat = hat;
slouken@8582
   432
            pMapping->hatasbutton[ button ].mask = mask;
slouken@8582
   433
            ridx = (hat << 4) | mask;
slouken@8582
   434
            pMapping->rhatasbutton[ ridx ] = button;
slouken@8772
   435
        } else if (axis != SDL_CONTROLLER_AXIS_INVALID) {
slouken@8772
   436
            SDL_assert(!"Support hat as axis");
slouken@8772
   437
        } else {
slouken@8772
   438
            SDL_assert(!"How did we get here?");
slouken@8582
   439
        }
slouken@8582
   440
    }
slouken@8582
   441
}
slouken@8582
   442
slouken@8582
   443
slouken@8582
   444
/*
slouken@8582
   445
 * given a controller mapping string update our mapping object
slouken@8582
   446
 */
slouken@8582
   447
static void
slouken@8772
   448
SDL_PrivateGameControllerParseControllerConfigString(struct _SDL_ControllerMapping *pMapping, const char *pchString)
slouken@8582
   449
{
slouken@8582
   450
    char szGameButton[20];
slouken@8582
   451
    char szJoystickButton[20];
slouken@8582
   452
    SDL_bool bGameButton = SDL_TRUE;
slouken@8582
   453
    int i = 0;
slouken@8582
   454
    const char *pchPos = pchString;
slouken@8582
   455
slouken@8772
   456
    SDL_memset(szGameButton, 0x0, sizeof(szGameButton));
slouken@8772
   457
    SDL_memset(szJoystickButton, 0x0, sizeof(szJoystickButton));
slouken@8582
   458
slouken@8772
   459
    while (pchPos && *pchPos) {
slouken@8772
   460
        if (*pchPos == ':') {
slouken@8582
   461
            i = 0;
slouken@8582
   462
            bGameButton = SDL_FALSE;
slouken@8772
   463
        } else if (*pchPos == ' ') {
slouken@8582
   464
slouken@8772
   465
        } else if (*pchPos == ',') {
slouken@8582
   466
            i = 0;
slouken@8582
   467
            bGameButton = SDL_TRUE;
slouken@8772
   468
            SDL_PrivateGameControllerParseButton(szGameButton, szJoystickButton, pMapping);
slouken@8772
   469
            SDL_memset(szGameButton, 0x0, sizeof(szGameButton));
slouken@8772
   470
            SDL_memset(szJoystickButton, 0x0, sizeof(szJoystickButton));
slouken@8582
   471
slouken@8772
   472
        } else if (bGameButton) {
slouken@8772
   473
            if (i >= sizeof(szGameButton)) {
slouken@8772
   474
                SDL_SetError("Button name too large: %s", szGameButton);
slouken@8582
   475
                return;
slouken@8582
   476
            }
slouken@8582
   477
            szGameButton[i] = *pchPos;
slouken@8582
   478
            i++;
slouken@8772
   479
        } else {
slouken@8772
   480
            if (i >= sizeof(szJoystickButton)) {
slouken@8772
   481
                SDL_SetError("Joystick button name too large: %s", szJoystickButton);
slouken@8582
   482
                return;
slouken@8582
   483
            }
slouken@8582
   484
            szJoystickButton[i] = *pchPos;
slouken@8582
   485
            i++;
slouken@8582
   486
        }
slouken@8582
   487
        pchPos++;
slouken@8582
   488
    }
slouken@8582
   489
slouken@8772
   490
    SDL_PrivateGameControllerParseButton(szGameButton, szJoystickButton, pMapping);
slouken@8582
   491
slouken@8582
   492
}
slouken@8582
   493
slouken@8582
   494
/*
slouken@8582
   495
 * Make a new button mapping struct
slouken@8582
   496
 */
slouken@8772
   497
void SDL_PrivateLoadButtonMapping(struct _SDL_ControllerMapping *pMapping, SDL_JoystickGUID guid, const char *pchName, const char *pchMapping)
slouken@8582
   498
{
slouken@8582
   499
    int j;
slouken@8582
   500
slouken@8582
   501
    pMapping->guid = guid;
slouken@8582
   502
    pMapping->name = pchName;
slouken@8582
   503
slouken@8582
   504
    /* set all the button mappings to non defaults */
slouken@8772
   505
    for (j = 0; j < SDL_CONTROLLER_AXIS_MAX; j++) {
slouken@8582
   506
        pMapping->axes[j] = -1;
slouken@8582
   507
        pMapping->buttonasaxis[j] = -1;
slouken@8582
   508
    }
slouken@8772
   509
    for (j = 0; j < SDL_CONTROLLER_BUTTON_MAX; j++) {
slouken@8582
   510
        pMapping->buttons[j] = -1;
slouken@8582
   511
        pMapping->axesasbutton[j] = -1;
slouken@8582
   512
        pMapping->hatasbutton[j].hat = -1;
slouken@8582
   513
    }
slouken@8582
   514
slouken@8772
   515
    for (j = 0; j < k_nMaxReverseEntries; j++) {
slouken@8582
   516
        pMapping->raxes[j] = SDL_CONTROLLER_AXIS_INVALID;
slouken@8582
   517
        pMapping->rbuttonasaxis[j] = SDL_CONTROLLER_AXIS_INVALID;
slouken@8582
   518
        pMapping->rbuttons[j] = SDL_CONTROLLER_BUTTON_INVALID;
slouken@8582
   519
        pMapping->raxesasbutton[j] = SDL_CONTROLLER_BUTTON_INVALID;
slouken@8582
   520
    }
slouken@8582
   521
slouken@8772
   522
    for (j = 0; j < k_nMaxHatEntries; j++) {
slouken@8582
   523
        pMapping->rhatasbutton[j] = SDL_CONTROLLER_BUTTON_INVALID;
slouken@8582
   524
    }
slouken@8582
   525
slouken@8772
   526
    SDL_PrivateGameControllerParseControllerConfigString(pMapping, pchMapping);
slouken@8582
   527
}
slouken@8582
   528
slouken@8582
   529
slouken@8582
   530
/*
slouken@8582
   531
 * grab the guid string from a mapping string
slouken@8582
   532
 */
slouken@8772
   533
char *SDL_PrivateGetControllerGUIDFromMappingString(const char *pMapping)
slouken@8582
   534
{
slouken@8772
   535
    const char *pFirstComma = SDL_strchr(pMapping, ',');
slouken@8772
   536
    if (pFirstComma) {
slouken@8772
   537
        char *pchGUID = SDL_malloc(pFirstComma - pMapping + 1);
slouken@8772
   538
        if (!pchGUID) {
slouken@8582
   539
            SDL_OutOfMemory();
slouken@8582
   540
            return NULL;
slouken@8582
   541
        }
slouken@8772
   542
        SDL_memcpy(pchGUID, pMapping, pFirstComma - pMapping);
slouken@8582
   543
        pchGUID[ pFirstComma - pMapping ] = 0;
slouken@8582
   544
        return pchGUID;
slouken@8582
   545
    }
slouken@8582
   546
    return NULL;
slouken@8582
   547
}
slouken@8582
   548
slouken@8582
   549
slouken@8582
   550
/*
slouken@8582
   551
 * grab the name string from a mapping string
slouken@8582
   552
 */
slouken@8772
   553
char *SDL_PrivateGetControllerNameFromMappingString(const char *pMapping)
slouken@8582
   554
{
slouken@8582
   555
    const char *pFirstComma, *pSecondComma;
slouken@8582
   556
    char *pchName;
slouken@8582
   557
slouken@8772
   558
    pFirstComma = SDL_strchr(pMapping, ',');
slouken@8772
   559
    if (!pFirstComma)
slouken@8582
   560
        return NULL;
slouken@8582
   561
slouken@8772
   562
    pSecondComma = SDL_strchr(pFirstComma + 1, ',');
slouken@8772
   563
    if (!pSecondComma)
slouken@8582
   564
        return NULL;
slouken@8582
   565
slouken@8772
   566
    pchName = SDL_malloc(pSecondComma - pFirstComma);
slouken@8772
   567
    if (!pchName) {
slouken@8582
   568
        SDL_OutOfMemory();
slouken@8582
   569
        return NULL;
slouken@8582
   570
    }
slouken@8772
   571
    SDL_memcpy(pchName, pFirstComma + 1, pSecondComma - pFirstComma);
slouken@8582
   572
    pchName[ pSecondComma - pFirstComma - 1 ] = 0;
slouken@8582
   573
    return pchName;
slouken@8582
   574
}
slouken@8582
   575
slouken@8582
   576
slouken@8582
   577
/*
slouken@8582
   578
 * grab the button mapping string from a mapping string
slouken@8582
   579
 */
slouken@8772
   580
char *SDL_PrivateGetControllerMappingFromMappingString(const char *pMapping)
slouken@8582
   581
{
slouken@8582
   582
    const char *pFirstComma, *pSecondComma;
slouken@8582
   583
slouken@8772
   584
    pFirstComma = SDL_strchr(pMapping, ',');
slouken@8772
   585
    if (!pFirstComma)
slouken@8582
   586
        return NULL;
slouken@8582
   587
slouken@8772
   588
    pSecondComma = SDL_strchr(pFirstComma + 1, ',');
slouken@8772
   589
    if (!pSecondComma)
slouken@8582
   590
        return NULL;
slouken@8582
   591
slouken@8582
   592
    return SDL_strdup(pSecondComma + 1); /* mapping is everything after the 3rd comma */
slouken@8582
   593
}
slouken@8582
   594
slouken@9956
   595
/*
slouken@9956
   596
 * Helper function to refresh a mapping
slouken@9956
   597
 */
slouken@8772
   598
void SDL_PrivateGameControllerRefreshMapping(ControllerMapping_t *pControllerMapping)
slouken@8582
   599
{
slouken@8582
   600
    SDL_GameController *gamecontrollerlist = SDL_gamecontrollers;
slouken@8772
   601
    while (gamecontrollerlist) {
slouken@8772
   602
        if (!SDL_memcmp(&gamecontrollerlist->mapping.guid, &pControllerMapping->guid, sizeof(pControllerMapping->guid))) {
slouken@8582
   603
            SDL_Event event;
slouken@8582
   604
            event.type = SDL_CONTROLLERDEVICEREMAPPED;
slouken@8582
   605
            event.cdevice.which = gamecontrollerlist->joystick->instance_id;
slouken@8582
   606
            SDL_PushEvent(&event);
slouken@8582
   607
slouken@8582
   608
            /* Not really threadsafe.  Should this lock access within SDL_GameControllerEventWatcher? */
slouken@8582
   609
            SDL_PrivateLoadButtonMapping(&gamecontrollerlist->mapping, pControllerMapping->guid, pControllerMapping->name, pControllerMapping->mapping);
slouken@8582
   610
        }
slouken@8582
   611
slouken@8582
   612
        gamecontrollerlist = gamecontrollerlist->next;
slouken@8582
   613
    }
slouken@8582
   614
}
slouken@8582
   615
slouken@8582
   616
/*
slouken@9956
   617
 * Helper function to add a mapping for a guid
slouken@9956
   618
 */
slouken@9956
   619
static ControllerMapping_t *
slouken@9956
   620
SDL_PrivateAddMappingForGUID(SDL_JoystickGUID jGUID, const char *mappingString, SDL_bool *existing)
slouken@9956
   621
{
slouken@9956
   622
    char *pchName;
slouken@9956
   623
    char *pchMapping;
slouken@9956
   624
    ControllerMapping_t *pControllerMapping;
slouken@9956
   625
slouken@9956
   626
    pchName = SDL_PrivateGetControllerNameFromMappingString(mappingString);
slouken@9956
   627
    if (!pchName) {
slouken@9956
   628
        SDL_SetError("Couldn't parse name from %s", mappingString);
slouken@9956
   629
        return NULL;
slouken@9956
   630
    }
slouken@9956
   631
slouken@9956
   632
    pchMapping = SDL_PrivateGetControllerMappingFromMappingString(mappingString);
slouken@9956
   633
    if (!pchMapping) {
slouken@9956
   634
        SDL_free(pchName);
slouken@9956
   635
        SDL_SetError("Couldn't parse %s", mappingString);
slouken@9956
   636
        return NULL;
slouken@9956
   637
    }
slouken@9956
   638
slouken@9956
   639
    pControllerMapping = SDL_PrivateGetControllerMappingForGUID(&jGUID);
slouken@9956
   640
    if (pControllerMapping) {
slouken@9956
   641
        /* Update existing mapping */
slouken@9956
   642
        SDL_free(pControllerMapping->name);
slouken@9956
   643
        pControllerMapping->name = pchName;
slouken@9956
   644
        SDL_free(pControllerMapping->mapping);
slouken@9956
   645
        pControllerMapping->mapping = pchMapping;
slouken@9956
   646
        /* refresh open controllers */
slouken@9956
   647
        SDL_PrivateGameControllerRefreshMapping(pControllerMapping);
slouken@9956
   648
        *existing = SDL_TRUE;
slouken@9956
   649
    } else {
slouken@9956
   650
        pControllerMapping = SDL_malloc(sizeof(*pControllerMapping));
slouken@9956
   651
        if (!pControllerMapping) {
slouken@9956
   652
            SDL_free(pchName);
slouken@9956
   653
            SDL_free(pchMapping);
slouken@9956
   654
            SDL_OutOfMemory();
slouken@9956
   655
            return NULL;
slouken@9956
   656
        }
slouken@9956
   657
        pControllerMapping->guid = jGUID;
slouken@9956
   658
        pControllerMapping->name = pchName;
slouken@9956
   659
        pControllerMapping->mapping = pchMapping;
slouken@9956
   660
        pControllerMapping->next = s_pSupportedControllers;
slouken@9956
   661
        s_pSupportedControllers = pControllerMapping;
slouken@9956
   662
        *existing = SDL_FALSE;
slouken@9956
   663
    }
slouken@9956
   664
    return pControllerMapping;
slouken@9956
   665
}
slouken@9956
   666
slouken@9956
   667
/*
slouken@9956
   668
 * Helper function to determine pre-calculated offset to certain joystick mappings
slouken@9956
   669
 */
slouken@9956
   670
ControllerMapping_t *SDL_PrivateGetControllerMapping(int device_index)
slouken@9956
   671
{
slouken@9956
   672
    SDL_JoystickGUID jGUID = SDL_JoystickGetDeviceGUID(device_index);
slouken@9956
   673
    ControllerMapping_t *mapping;
slouken@9956
   674
slouken@9956
   675
    mapping = SDL_PrivateGetControllerMappingForGUID(&jGUID);
slouken@9956
   676
#if SDL_JOYSTICK_XINPUT
slouken@9956
   677
    if (!mapping && SDL_SYS_IsXInputGamepad_DeviceIndex(device_index)) {
slouken@9956
   678
        mapping = s_pXInputMapping;
slouken@9956
   679
    }
slouken@9956
   680
#endif
slouken@9956
   681
#if defined(SDL_JOYSTICK_EMSCRIPTEN)
slouken@9956
   682
    if (!mapping && s_pEmscriptenMapping) {
slouken@9956
   683
        mapping = s_pEmscriptenMapping;
slouken@9956
   684
    }
slouken@9956
   685
#endif
slouken@9956
   686
#ifdef __LINUX__
slouken@9956
   687
    if (!mapping) {
slouken@9956
   688
        const char *name = SDL_JoystickNameForIndex(device_index);
slouken@9956
   689
        if (name) {
slouken@9956
   690
            if (SDL_strstr(name, "Xbox 360 Wireless Receiver")) {
slouken@9956
   691
                /* The Linux driver xpad.c maps the wireless dpad to buttons */
slouken@9956
   692
                SDL_bool existing;
slouken@9956
   693
                mapping = SDL_PrivateAddMappingForGUID(jGUID,
slouken@9956
   694
"none,X360 Wireless Controller,a:b0,b:b1,back:b6,dpdown:b14,dpleft:b11,dpright:b12,dpup:b13,guide:b8,leftshoulder:b4,leftstick:b9,lefttrigger:a2,leftx:a0,lefty:a1,rightshoulder:b5,rightstick:b10,righttrigger:a5,rightx:a3,righty:a4,start:b7,x:b2,y:b3,",
slouken@9956
   695
                              &existing);
slouken@9956
   696
            }
slouken@9956
   697
        }
slouken@9956
   698
    }
slouken@9956
   699
#endif /* __LINUX__ */
slouken@9956
   700
slouken@9956
   701
    if (!mapping) {
slouken@9956
   702
        const char *name = SDL_JoystickNameForIndex(device_index);
slouken@9956
   703
        if (name) {
slouken@9956
   704
            if (SDL_strstr(name, "Xbox") || SDL_strstr(name, "X-Box")) {
slouken@9956
   705
                mapping = s_pXInputMapping;
slouken@9956
   706
            }
slouken@9956
   707
        }
slouken@9956
   708
    }
slouken@9956
   709
    return mapping;
slouken@9956
   710
}
slouken@9956
   711
slouken@9956
   712
/*
slouken@8582
   713
 * Add or update an entry into the Mappings Database
slouken@8582
   714
 */
slouken@8582
   715
int
slouken@8772
   716
SDL_GameControllerAddMappingsFromRW(SDL_RWops * rw, int freerw)
gabomdq@8042
   717
{
gabomdq@8042
   718
    const char *platform = SDL_GetPlatform();
gabomdq@8042
   719
    int controllers = 0;
gabomdq@8042
   720
    char *buf, *line, *line_end, *tmp, *comma, line_platform[64];
gabomdq@8042
   721
    size_t db_size, platform_len;
gabomdq@8042
   722
    
gabomdq@8042
   723
    if (rw == NULL) {
gabomdq@8046
   724
        return SDL_SetError("Invalid RWops");
gabomdq@8042
   725
    }
slouken@8052
   726
    db_size = (size_t)SDL_RWsize(rw);
gabomdq@8042
   727
    
slouken@8052
   728
    buf = (char *)SDL_malloc(db_size + 1);
gabomdq@8042
   729
    if (buf == NULL) {
gabomdq@8046
   730
        if (freerw) {
gabomdq@8046
   731
            SDL_RWclose(rw);
gabomdq@8046
   732
        }
philipp@9194
   733
        return SDL_SetError("Could not allocate space to read DB into memory");
gabomdq@8042
   734
    }
gabomdq@8042
   735
    
gabomdq@8042
   736
    if (SDL_RWread(rw, buf, db_size, 1) != 1) {
gabomdq@8046
   737
        if (freerw) {
gabomdq@8046
   738
            SDL_RWclose(rw);
gabomdq@8046
   739
        }
gabomdq@8042
   740
        SDL_free(buf);
gabomdq@8042
   741
        return SDL_SetError("Could not read DB");
gabomdq@8042
   742
    }
gabomdq@8046
   743
    
gabomdq@8046
   744
    if (freerw) {
gabomdq@8046
   745
        SDL_RWclose(rw);
gabomdq@8046
   746
    }
gabomdq@8042
   747
    
gabomdq@8042
   748
    buf[db_size] = '\0';
gabomdq@8042
   749
    line = buf;
gabomdq@8042
   750
    
gabomdq@8042
   751
    while (line < buf + db_size) {
slouken@8772
   752
        line_end = SDL_strchr(line, '\n');
gabomdq@8042
   753
        if (line_end != NULL) {
gabomdq@8042
   754
            *line_end = '\0';
slouken@8772
   755
        } else {
gabomdq@8042
   756
            line_end = buf + db_size;
gabomdq@8042
   757
        }
gabomdq@8042
   758
        
gabomdq@8042
   759
        /* Extract and verify the platform */
gabomdq@8042
   760
        tmp = SDL_strstr(line, SDL_CONTROLLER_PLATFORM_FIELD);
slouken@8772
   761
        if (tmp != NULL) {
gabomdq@8042
   762
            tmp += SDL_strlen(SDL_CONTROLLER_PLATFORM_FIELD);
gabomdq@8042
   763
            comma = SDL_strchr(tmp, ',');
gabomdq@8042
   764
            if (comma != NULL) {
gabomdq@8042
   765
                platform_len = comma - tmp + 1;
gabomdq@8042
   766
                if (platform_len + 1 < SDL_arraysize(line_platform)) {
gabomdq@8042
   767
                    SDL_strlcpy(line_platform, tmp, platform_len);
slouken@8772
   768
                    if (SDL_strncasecmp(line_platform, platform, platform_len) == 0 &&
slouken@8772
   769
                        SDL_GameControllerAddMapping(line) > 0) {
gabomdq@8042
   770
                        controllers++;
gabomdq@8042
   771
                    }
gabomdq@8042
   772
                }
gabomdq@8042
   773
            }
gabomdq@8042
   774
        }
gabomdq@8042
   775
        
gabomdq@8042
   776
        line = line_end + 1;
gabomdq@8042
   777
    }
gabomdq@8042
   778
gabomdq@8042
   779
    SDL_free(buf);
gabomdq@8042
   780
    return controllers;
gabomdq@8042
   781
}
gabomdq@8042
   782
gabomdq@8042
   783
/*
gabomdq@8042
   784
 * Add or update an entry into the Mappings Database
gabomdq@8042
   785
 */
gabomdq@8042
   786
int
slouken@8772
   787
SDL_GameControllerAddMapping(const char *mappingString)
slouken@8582
   788
{
slouken@8582
   789
    char *pchGUID;
slouken@8582
   790
    SDL_JoystickGUID jGUID;
slouken@8582
   791
    SDL_bool is_xinput_mapping = SDL_FALSE;
icculus@9278
   792
    SDL_bool is_emscripten_mapping = SDL_FALSE;
slouken@9956
   793
    SDL_bool existing = SDL_FALSE;
slouken@9956
   794
    ControllerMapping_t *pControllerMapping;
slouken@8582
   795
philipp@9198
   796
    if (!mappingString) {
philipp@9198
   797
        return SDL_InvalidParamError("mappingString");
philipp@9198
   798
    }
philipp@9198
   799
slouken@8772
   800
    pchGUID = SDL_PrivateGetControllerGUIDFromMappingString(mappingString);
slouken@8582
   801
    if (!pchGUID) {
philipp@8081
   802
        return SDL_SetError("Couldn't parse GUID from %s", mappingString);
slouken@8582
   803
    }
slouken@8772
   804
    if (!SDL_strcasecmp(pchGUID, "xinput")) {
slouken@8582
   805
        is_xinput_mapping = SDL_TRUE;
slouken@8582
   806
    }
icculus@9278
   807
    if (!SDL_strcasecmp(pchGUID, "emscripten")) {
icculus@9278
   808
        is_emscripten_mapping = SDL_TRUE;
icculus@9278
   809
    }
slouken@8582
   810
    jGUID = SDL_JoystickGetGUIDFromString(pchGUID);
slouken@8582
   811
    SDL_free(pchGUID);
slouken@8582
   812
slouken@9956
   813
    pControllerMapping = SDL_PrivateAddMappingForGUID(jGUID, mappingString, &existing);
slouken@9956
   814
    if (!pControllerMapping) {
slouken@9956
   815
        return -1;
slouken@8053
   816
    }
slouken@8582
   817
slouken@9956
   818
    if (existing) {
slouken@8582
   819
        return 0;
slouken@8582
   820
    } else {
slouken@8772
   821
        if (is_xinput_mapping) {
slouken@8582
   822
            s_pXInputMapping = pControllerMapping;
slouken@8582
   823
        }
icculus@9278
   824
        if (is_emscripten_mapping) {
icculus@9278
   825
            s_pEmscriptenMapping = pControllerMapping;
icculus@9278
   826
        }
slouken@8582
   827
        return 1;
slouken@8582
   828
    }
slouken@8582
   829
}
slouken@8582
   830
slouken@8582
   831
/*
slouken@8582
   832
 * Get the mapping string for this GUID
slouken@8582
   833
 */
slouken@8582
   834
char *
slouken@8772
   835
SDL_GameControllerMappingForGUID(SDL_JoystickGUID guid)
slouken@8582
   836
{
slouken@8582
   837
    char *pMappingString = NULL;
slouken@8582
   838
    ControllerMapping_t *mapping = SDL_PrivateGetControllerMappingForGUID(&guid);
slouken@8582
   839
    if (mapping) {
slouken@8582
   840
        char pchGUID[33];
slouken@8582
   841
        size_t needed;
slouken@8582
   842
        SDL_JoystickGetGUIDString(guid, pchGUID, sizeof(pchGUID));
slouken@8582
   843
        /* allocate enough memory for GUID + ',' + name + ',' + mapping + \0 */
slouken@8582
   844
        needed = SDL_strlen(pchGUID) + 1 + SDL_strlen(mapping->name) + 1 + SDL_strlen(mapping->mapping) + 1;
slouken@8772
   845
        pMappingString = SDL_malloc(needed);
philipp@9197
   846
        if (!pMappingString) {
philipp@9197
   847
            SDL_OutOfMemory();
philipp@9197
   848
            return NULL;
philipp@9197
   849
        }
slouken@8772
   850
        SDL_snprintf(pMappingString, needed, "%s,%s,%s", pchGUID, mapping->name, mapping->mapping);
slouken@8582
   851
    }
slouken@8582
   852
    return pMappingString;
slouken@8582
   853
}
slouken@8582
   854
slouken@8582
   855
/*
slouken@8582
   856
 * Get the mapping string for this device
slouken@8582
   857
 */
slouken@8582
   858
char *
slouken@8772
   859
SDL_GameControllerMapping(SDL_GameController * gamecontroller)
slouken@8582
   860
{
philipp@9196
   861
    if (!gamecontroller) {
philipp@9196
   862
        return NULL;
philipp@9196
   863
    }
philipp@9196
   864
slouken@8772
   865
    return SDL_GameControllerMappingForGUID(gamecontroller->mapping.guid);
slouken@8582
   866
}
slouken@8582
   867
slouken@8582
   868
static void
slouken@8582
   869
SDL_GameControllerLoadHints()
slouken@8582
   870
{
slouken@8582
   871
    const char *hint = SDL_GetHint(SDL_HINT_GAMECONTROLLERCONFIG);
slouken@8772
   872
    if (hint && hint[0]) {
slouken@8772
   873
        size_t nchHints = SDL_strlen(hint);
slouken@8772
   874
        char *pUserMappings = SDL_malloc(nchHints + 1);
slouken@8582
   875
        char *pTempMappings = pUserMappings;
slouken@8772
   876
        SDL_memcpy(pUserMappings, hint, nchHints);
slouken@8267
   877
        pUserMappings[nchHints] = '\0';
slouken@8772
   878
        while (pUserMappings) {
slouken@8582
   879
            char *pchNewLine = NULL;
slouken@8582
   880
slouken@8772
   881
            pchNewLine = SDL_strchr(pUserMappings, '\n');
slouken@8772
   882
            if (pchNewLine)
slouken@8582
   883
                *pchNewLine = '\0';
slouken@8582
   884
slouken@8772
   885
            SDL_GameControllerAddMapping(pUserMappings);
slouken@8582
   886
slouken@8772
   887
            if (pchNewLine) {
slouken@8582
   888
                pUserMappings = pchNewLine + 1;
slouken@8772
   889
            } else {
slouken@8582
   890
                pUserMappings = NULL;
slouken@8772
   891
            }
slouken@8582
   892
        }
slouken@8582
   893
        SDL_free(pTempMappings);
slouken@8582
   894
    }
slouken@8582
   895
}
slouken@8582
   896
slouken@8582
   897
/*
slouken@8582
   898
 * Initialize the game controller system, mostly load our DB of controller config mappings
slouken@8582
   899
 */
slouken@8582
   900
int
slouken@8582
   901
SDL_GameControllerInit(void)
slouken@8582
   902
{
slouken@8582
   903
    int i = 0;
slouken@8582
   904
    const char *pMappingString = NULL;
slouken@8582
   905
    pMappingString = s_ControllerMappings[i];
slouken@8772
   906
    while (pMappingString) {
slouken@8772
   907
        SDL_GameControllerAddMapping(pMappingString);
slouken@8582
   908
slouken@8582
   909
        i++;
slouken@8582
   910
        pMappingString = s_ControllerMappings[i];
slouken@8582
   911
    }
slouken@8582
   912
slouken@8582
   913
    /* load in any user supplied config */
slouken@8582
   914
    SDL_GameControllerLoadHints();
slouken@8582
   915
slouken@8582
   916
    /* watch for joy events and fire controller ones if needed */
slouken@8772
   917
    SDL_AddEventWatch(SDL_GameControllerEventWatcher, NULL);
slouken@8582
   918
slouken@8067
   919
    /* Send added events for controllers currently attached */
slouken@8067
   920
    for (i = 0; i < SDL_NumJoysticks(); ++i) {
slouken@8067
   921
        if (SDL_IsGameController(i)) {
slouken@8067
   922
            SDL_Event deviceevent;
slouken@8067
   923
            deviceevent.type = SDL_CONTROLLERDEVICEADDED;
slouken@8067
   924
            deviceevent.cdevice.which = i;
slouken@8067
   925
            SDL_PushEvent(&deviceevent);
slouken@8067
   926
        }
slouken@8067
   927
    }
slouken@8067
   928
slouken@8582
   929
    return (0);
slouken@8582
   930
}
slouken@8582
   931
slouken@8582
   932
slouken@8582
   933
/*
slouken@8582
   934
 * Get the implementation dependent name of a controller
slouken@8582
   935
 */
slouken@8582
   936
const char *
slouken@8582
   937
SDL_GameControllerNameForIndex(int device_index)
slouken@8582
   938
{
slouken@8582
   939
    ControllerMapping_t *pSupportedController =  SDL_PrivateGetControllerMapping(device_index);
slouken@8772
   940
    if (pSupportedController) {
slouken@8582
   941
        return pSupportedController->name;
slouken@8582
   942
    }
slouken@8582
   943
    return NULL;
slouken@8582
   944
}
slouken@8582
   945
slouken@8582
   946
slouken@8582
   947
/*
slouken@8582
   948
 * Return 1 if the joystick at this device index is a supported controller
slouken@8582
   949
 */
slouken@8582
   950
SDL_bool
slouken@8582
   951
SDL_IsGameController(int device_index)
slouken@8582
   952
{
slouken@8582
   953
    ControllerMapping_t *pSupportedController =  SDL_PrivateGetControllerMapping(device_index);
slouken@8772
   954
    if (pSupportedController) {
slouken@8582
   955
        return SDL_TRUE;
slouken@8582
   956
    }
slouken@8582
   957
slouken@8582
   958
    return SDL_FALSE;
slouken@8582
   959
}
slouken@8582
   960
slouken@8582
   961
/*
slouken@8582
   962
 * Open a controller for use - the index passed as an argument refers to
slouken@8582
   963
 * the N'th controller on the system.  This index is the value which will
slouken@8582
   964
 * identify this controller in future controller events.
slouken@8582
   965
 *
slouken@8582
   966
 * This function returns a controller identifier, or NULL if an error occurred.
slouken@8582
   967
 */
slouken@8582
   968
SDL_GameController *
slouken@8582
   969
SDL_GameControllerOpen(int device_index)
slouken@8582
   970
{
slouken@8582
   971
    SDL_GameController *gamecontroller;
slouken@8582
   972
    SDL_GameController *gamecontrollerlist;
slouken@8582
   973
    ControllerMapping_t *pSupportedController = NULL;
slouken@8582
   974
slouken@8582
   975
    if ((device_index < 0) || (device_index >= SDL_NumJoysticks())) {
slouken@8582
   976
        SDL_SetError("There are %d joysticks available", SDL_NumJoysticks());
slouken@8582
   977
        return (NULL);
slouken@8582
   978
    }
slouken@8582
   979
slouken@8582
   980
    gamecontrollerlist = SDL_gamecontrollers;
slouken@8582
   981
    /* If the controller is already open, return it */
slouken@8772
   982
    while (gamecontrollerlist) {
slouken@8772
   983
        if (SDL_SYS_GetInstanceIdOfDeviceIndex(device_index) == gamecontrollerlist->joystick->instance_id) {
slouken@8582
   984
                gamecontroller = gamecontrollerlist;
slouken@8582
   985
                ++gamecontroller->ref_count;
slouken@8582
   986
                return (gamecontroller);
slouken@8582
   987
        }
slouken@8582
   988
        gamecontrollerlist = gamecontrollerlist->next;
slouken@8582
   989
    }
slouken@8582
   990
slouken@8582
   991
    /* Find a controller mapping */
slouken@8582
   992
    pSupportedController =  SDL_PrivateGetControllerMapping(device_index);
slouken@8772
   993
    if (!pSupportedController) {
slouken@8772
   994
        SDL_SetError("Couldn't find mapping for device (%d)", device_index);
slouken@8582
   995
        return (NULL);
slouken@8582
   996
    }
slouken@8582
   997
slouken@8582
   998
    /* Create and initialize the joystick */
slouken@8582
   999
    gamecontroller = (SDL_GameController *) SDL_malloc((sizeof *gamecontroller));
slouken@8582
  1000
    if (gamecontroller == NULL) {
slouken@8582
  1001
        SDL_OutOfMemory();
slouken@8582
  1002
        return NULL;
slouken@8582
  1003
    }
slouken@8582
  1004
slouken@8582
  1005
    SDL_memset(gamecontroller, 0, (sizeof *gamecontroller));
slouken@8582
  1006
    gamecontroller->joystick = SDL_JoystickOpen(device_index);
slouken@8772
  1007
    if (!gamecontroller->joystick) {
slouken@8582
  1008
        SDL_free(gamecontroller);
slouken@8582
  1009
        return NULL;
slouken@8582
  1010
    }
slouken@8582
  1011
slouken@8772
  1012
    SDL_PrivateLoadButtonMapping(&gamecontroller->mapping, pSupportedController->guid, pSupportedController->name, pSupportedController->mapping);
slouken@8582
  1013
slouken@10476
  1014
    /* The triggers are mapped from -32768 to 32767, where -32768 is the 'unpressed' value */
slouken@10476
  1015
    {
slouken@10476
  1016
        int leftTriggerMapping = gamecontroller->mapping.axes[SDL_CONTROLLER_AXIS_TRIGGERLEFT];
slouken@10476
  1017
        int rightTriggerMapping = gamecontroller->mapping.axes[SDL_CONTROLLER_AXIS_TRIGGERRIGHT];
slouken@10476
  1018
        if (leftTriggerMapping >= 0) {
slouken@10477
  1019
            gamecontroller->joystick->axes[leftTriggerMapping] =
slouken@10477
  1020
            gamecontroller->joystick->axes_zero[leftTriggerMapping] = (Sint16)-32768;
slouken@10476
  1021
        }
slouken@10476
  1022
        if (rightTriggerMapping >= 0) {
slouken@10477
  1023
            gamecontroller->joystick->axes[rightTriggerMapping] =
slouken@10477
  1024
            gamecontroller->joystick->axes_zero[rightTriggerMapping] = (Sint16)-32768;
slouken@10476
  1025
        }
slouken@10476
  1026
    }
slouken@10476
  1027
slouken@8582
  1028
    /* Add joystick to list */
slouken@8582
  1029
    ++gamecontroller->ref_count;
slouken@8582
  1030
    /* Link the joystick in the list */
slouken@8582
  1031
    gamecontroller->next = SDL_gamecontrollers;
slouken@8582
  1032
    SDL_gamecontrollers = gamecontroller;
slouken@8582
  1033
slouken@8772
  1034
    SDL_SYS_JoystickUpdate(gamecontroller->joystick);
slouken@8582
  1035
slouken@8582
  1036
    return (gamecontroller);
slouken@8582
  1037
}
slouken@8582
  1038
slouken@8582
  1039
/*
slouken@8582
  1040
 * Manually pump for controller updates.
slouken@8582
  1041
 */
slouken@8582
  1042
void
slouken@8582
  1043
SDL_GameControllerUpdate(void)
slouken@8582
  1044
{
slouken@8582
  1045
    /* Just for API completeness; the joystick API does all the work. */
slouken@8582
  1046
    SDL_JoystickUpdate();
slouken@8582
  1047
}
slouken@8582
  1048
slouken@8582
  1049
slouken@8582
  1050
/*
slouken@8582
  1051
 * Get the current state of an axis control on a controller
slouken@8582
  1052
 */
slouken@8582
  1053
Sint16
slouken@8582
  1054
SDL_GameControllerGetAxis(SDL_GameController * gamecontroller, SDL_GameControllerAxis axis)
slouken@8582
  1055
{
slouken@8772
  1056
    if (!gamecontroller)
slouken@8582
  1057
        return 0;
slouken@8582
  1058
slouken@8772
  1059
    if (gamecontroller->mapping.axes[axis] >= 0) {
slouken@8772
  1060
        Sint16 value = (SDL_JoystickGetAxis(gamecontroller->joystick, gamecontroller->mapping.axes[axis]));
slouken@8772
  1061
        switch (axis) {
slouken@8582
  1062
            case SDL_CONTROLLER_AXIS_TRIGGERLEFT:
slouken@8582
  1063
            case SDL_CONTROLLER_AXIS_TRIGGERRIGHT:
slouken@10476
  1064
                /* Shift it to be 0 - 32767 */
slouken@8582
  1065
                value = value / 2 + 16384;
slouken@8582
  1066
            default:
slouken@8582
  1067
                break;
slouken@8582
  1068
        }
slouken@8582
  1069
        return value;
slouken@8772
  1070
    } else if (gamecontroller->mapping.buttonasaxis[axis] >= 0) {
slouken@8582
  1071
        Uint8 value;
slouken@8772
  1072
        value = SDL_JoystickGetButton(gamecontroller->joystick, gamecontroller->mapping.buttonasaxis[axis]);
slouken@8772
  1073
        if (value > 0)
slouken@8582
  1074
            return 32767;
slouken@8582
  1075
        return 0;
slouken@8582
  1076
    }
slouken@8582
  1077
    return 0;
slouken@8582
  1078
}
slouken@8582
  1079
slouken@8582
  1080
slouken@8582
  1081
/*
slouken@8582
  1082
 * Get the current state of a button on a controller
slouken@8582
  1083
 */
slouken@8582
  1084
Uint8
slouken@8582
  1085
SDL_GameControllerGetButton(SDL_GameController * gamecontroller, SDL_GameControllerButton button)
slouken@8582
  1086
{
slouken@8772
  1087
    if (!gamecontroller)
slouken@8582
  1088
        return 0;
slouken@8582
  1089
slouken@8772
  1090
    if (gamecontroller->mapping.buttons[button] >= 0) {
slouken@8772
  1091
        return (SDL_JoystickGetButton(gamecontroller->joystick, gamecontroller->mapping.buttons[button]));
slouken@8772
  1092
    } else if (gamecontroller->mapping.axesasbutton[button] >= 0) {
slouken@8582
  1093
        Sint16 value;
slouken@8772
  1094
        value = SDL_JoystickGetAxis(gamecontroller->joystick, gamecontroller->mapping.axesasbutton[button]);
slouken@8772
  1095
        if (ABS(value) > 32768/2)
slouken@8582
  1096
            return 1;
slouken@8582
  1097
        return 0;
slouken@8772
  1098
    } else if (gamecontroller->mapping.hatasbutton[button].hat >= 0) {
slouken@8582
  1099
        Uint8 value;
slouken@8772
  1100
        value = SDL_JoystickGetHat(gamecontroller->joystick, gamecontroller->mapping.hatasbutton[button].hat);
slouken@8582
  1101
slouken@8772
  1102
        if (value & gamecontroller->mapping.hatasbutton[button].mask)
slouken@8582
  1103
            return 1;
slouken@8582
  1104
        return 0;
slouken@8582
  1105
    }
slouken@8582
  1106
slouken@8582
  1107
    return 0;
slouken@8582
  1108
}
slouken@8582
  1109
slouken@10595
  1110
const char *
slouken@10595
  1111
SDL_GameControllerName(SDL_GameController * gamecontroller)
slouken@10595
  1112
{
slouken@10595
  1113
    if (!gamecontroller)
slouken@10595
  1114
        return NULL;
slouken@10595
  1115
slouken@10595
  1116
    return gamecontroller->mapping.name;
slouken@10595
  1117
}
slouken@10595
  1118
slouken@10595
  1119
Uint16
slouken@10595
  1120
SDL_GameControllerGetVendor(SDL_GameController * gamecontroller)
slouken@10595
  1121
{
slouken@10595
  1122
    return SDL_JoystickGetVendor(SDL_GameControllerGetJoystick(gamecontroller));
slouken@10595
  1123
}
slouken@10595
  1124
slouken@10595
  1125
Uint16
slouken@10595
  1126
SDL_GameControllerGetProduct(SDL_GameController * gamecontroller)
slouken@10595
  1127
{
slouken@10595
  1128
    return SDL_JoystickGetProduct(SDL_GameControllerGetJoystick(gamecontroller));
slouken@10595
  1129
}
slouken@10595
  1130
slouken@10595
  1131
Uint16
slouken@10595
  1132
SDL_GameControllerGetProductVersion(SDL_GameController * gamecontroller)
slouken@10595
  1133
{
slouken@10595
  1134
    return SDL_JoystickGetProductVersion(SDL_GameControllerGetJoystick(gamecontroller));
slouken@10595
  1135
}
slouken@10595
  1136
slouken@8582
  1137
/*
slouken@8582
  1138
 * Return if the joystick in question is currently attached to the system,
slouken@8582
  1139
 *  \return 0 if not plugged in, 1 if still present.
slouken@8582
  1140
 */
slouken@8582
  1141
SDL_bool
slouken@8772
  1142
SDL_GameControllerGetAttached(SDL_GameController * gamecontroller)
slouken@8582
  1143
{
slouken@8772
  1144
    if (!gamecontroller)
slouken@8582
  1145
        return SDL_FALSE;
slouken@8582
  1146
slouken@8582
  1147
    return SDL_JoystickGetAttached(gamecontroller->joystick);
slouken@8582
  1148
}
slouken@8582
  1149
slouken@8582
  1150
/*
slouken@8582
  1151
 * Get the joystick for this controller
slouken@8582
  1152
 */
slouken@8582
  1153
SDL_Joystick *SDL_GameControllerGetJoystick(SDL_GameController * gamecontroller)
slouken@8582
  1154
{
slouken@8772
  1155
    if (!gamecontroller)
slouken@8582
  1156
        return NULL;
slouken@8582
  1157
slouken@8582
  1158
    return gamecontroller->joystick;
slouken@8582
  1159
}
slouken@8582
  1160
icculus@9916
  1161
icculus@9916
  1162
/*
icculus@9916
  1163
 * Find the SDL_GameController that owns this instance id
icculus@9916
  1164
 */
icculus@9916
  1165
SDL_GameController *
icculus@9916
  1166
SDL_GameControllerFromInstanceID(SDL_JoystickID joyid)
icculus@9916
  1167
{
icculus@9916
  1168
    SDL_GameController *gamecontroller = SDL_gamecontrollers;
icculus@9916
  1169
    while (gamecontroller) {
icculus@9916
  1170
        if (gamecontroller->joystick->instance_id == joyid) {
icculus@9916
  1171
            return gamecontroller;
icculus@9916
  1172
        }
icculus@9916
  1173
        gamecontroller = gamecontroller->next;
icculus@9916
  1174
    }
icculus@9916
  1175
icculus@9916
  1176
    return NULL;
icculus@9916
  1177
}
icculus@9916
  1178
icculus@9916
  1179
slouken@8582
  1180
/**
slouken@8582
  1181
 * Get the SDL joystick layer binding for this controller axis mapping
slouken@8582
  1182
 */
slouken@8582
  1183
SDL_GameControllerButtonBind SDL_GameControllerGetBindForAxis(SDL_GameController * gamecontroller, SDL_GameControllerAxis axis)
slouken@8582
  1184
{
slouken@8582
  1185
    SDL_GameControllerButtonBind bind;
slouken@8772
  1186
    SDL_memset(&bind, 0x0, sizeof(bind));
slouken@8582
  1187
slouken@8772
  1188
    if (!gamecontroller || axis == SDL_CONTROLLER_AXIS_INVALID)
slouken@8582
  1189
        return bind;
slouken@8582
  1190
slouken@8772
  1191
    if (gamecontroller->mapping.axes[axis] >= 0) {
slouken@8582
  1192
        bind.bindType = SDL_CONTROLLER_BINDTYPE_AXIS;
slouken@8582
  1193
        bind.value.button = gamecontroller->mapping.axes[axis];
slouken@8772
  1194
    } else if (gamecontroller->mapping.buttonasaxis[axis] >= 0) {
slouken@8582
  1195
        bind.bindType = SDL_CONTROLLER_BINDTYPE_BUTTON;
slouken@8582
  1196
        bind.value.button = gamecontroller->mapping.buttonasaxis[axis];
slouken@8582
  1197
    }
slouken@8582
  1198
slouken@8582
  1199
    return bind;
slouken@8582
  1200
}
slouken@8582
  1201
slouken@8582
  1202
slouken@8582
  1203
/**
slouken@8582
  1204
 * Get the SDL joystick layer binding for this controller button mapping
slouken@8582
  1205
 */
slouken@8582
  1206
SDL_GameControllerButtonBind SDL_GameControllerGetBindForButton(SDL_GameController * gamecontroller, SDL_GameControllerButton button)
slouken@8582
  1207
{
slouken@8582
  1208
    SDL_GameControllerButtonBind bind;
slouken@8772
  1209
    SDL_memset(&bind, 0x0, sizeof(bind));
slouken@8582
  1210
slouken@8772
  1211
    if (!gamecontroller || button == SDL_CONTROLLER_BUTTON_INVALID)
slouken@8582
  1212
        return bind;
slouken@8582
  1213
slouken@8772
  1214
    if (gamecontroller->mapping.buttons[button] >= 0) {
slouken@8582
  1215
        bind.bindType = SDL_CONTROLLER_BINDTYPE_BUTTON;
slouken@8582
  1216
        bind.value.button = gamecontroller->mapping.buttons[button];
slouken@8772
  1217
    } else if (gamecontroller->mapping.axesasbutton[button] >= 0) {
slouken@8582
  1218
        bind.bindType = SDL_CONTROLLER_BINDTYPE_AXIS;
slouken@8582
  1219
        bind.value.axis = gamecontroller->mapping.axesasbutton[button];
slouken@8772
  1220
    } else if (gamecontroller->mapping.hatasbutton[button].hat >= 0) {
slouken@8582
  1221
        bind.bindType = SDL_CONTROLLER_BINDTYPE_HAT;
slouken@8582
  1222
        bind.value.hat.hat = gamecontroller->mapping.hatasbutton[button].hat;
slouken@8582
  1223
        bind.value.hat.hat_mask = gamecontroller->mapping.hatasbutton[button].mask;
slouken@8582
  1224
    }
slouken@8582
  1225
slouken@8582
  1226
    return bind;
slouken@8582
  1227
}
slouken@8582
  1228
slouken@8582
  1229
slouken@8582
  1230
void
slouken@8582
  1231
SDL_GameControllerClose(SDL_GameController * gamecontroller)
slouken@8582
  1232
{
slouken@8582
  1233
    SDL_GameController *gamecontrollerlist, *gamecontrollerlistprev;
slouken@8582
  1234
slouken@8772
  1235
    if (!gamecontroller)
slouken@8582
  1236
        return;
slouken@8582
  1237
slouken@8582
  1238
    /* First decrement ref count */
slouken@8582
  1239
    if (--gamecontroller->ref_count > 0) {
slouken@8582
  1240
        return;
slouken@8582
  1241
    }
slouken@8582
  1242
slouken@8772
  1243
    SDL_JoystickClose(gamecontroller->joystick);
slouken@8582
  1244
slouken@8582
  1245
    gamecontrollerlist = SDL_gamecontrollers;
slouken@8582
  1246
    gamecontrollerlistprev = NULL;
slouken@8772
  1247
    while (gamecontrollerlist) {
slouken@8772
  1248
        if (gamecontroller == gamecontrollerlist) {
slouken@8772
  1249
            if (gamecontrollerlistprev) {
slouken@8582
  1250
                /* unlink this entry */
slouken@8582
  1251
                gamecontrollerlistprev->next = gamecontrollerlist->next;
slouken@8772
  1252
            } else {
slouken@8582
  1253
                SDL_gamecontrollers = gamecontroller->next;
slouken@8582
  1254
            }
slouken@8582
  1255
slouken@8582
  1256
            break;
slouken@8582
  1257
        }
slouken@8582
  1258
        gamecontrollerlistprev = gamecontrollerlist;
slouken@8582
  1259
        gamecontrollerlist = gamecontrollerlist->next;
slouken@8582
  1260
    }
slouken@8582
  1261
slouken@8582
  1262
    SDL_free(gamecontroller);
slouken@8582
  1263
}
slouken@8582
  1264
slouken@8582
  1265
slouken@8582
  1266
/*
slouken@8582
  1267
 * Quit the controller subsystem
slouken@8582
  1268
 */
slouken@8582
  1269
void
slouken@8582
  1270
SDL_GameControllerQuit(void)
slouken@8582
  1271
{
slouken@8582
  1272
    ControllerMapping_t *pControllerMap;
slouken@8772
  1273
    while (SDL_gamecontrollers) {
slouken@8582
  1274
        SDL_gamecontrollers->ref_count = 1;
slouken@8582
  1275
        SDL_GameControllerClose(SDL_gamecontrollers);
slouken@8582
  1276
    }
slouken@8582
  1277
slouken@8772
  1278
    while (s_pSupportedControllers) {
slouken@8582
  1279
        pControllerMap = s_pSupportedControllers;
slouken@8582
  1280
        s_pSupportedControllers = s_pSupportedControllers->next;
slouken@8772
  1281
        SDL_free(pControllerMap->name);
slouken@8772
  1282
        SDL_free(pControllerMap->mapping);
slouken@8772
  1283
        SDL_free(pControllerMap);
slouken@8582
  1284
    }
slouken@8582
  1285
slouken@8772
  1286
    SDL_DelEventWatch(SDL_GameControllerEventWatcher, NULL);
slouken@8582
  1287
slouken@8582
  1288
}
slouken@8582
  1289
slouken@8582
  1290
/*
slouken@8582
  1291
 * Event filter to transform joystick events into appropriate game controller ones
slouken@8582
  1292
 */
slouken@8582
  1293
int
slouken@8582
  1294
SDL_PrivateGameControllerAxis(SDL_GameController * gamecontroller, SDL_GameControllerAxis axis, Sint16 value)
slouken@8582
  1295
{
slouken@8582
  1296
    int posted;
slouken@8582
  1297
slouken@8582
  1298
    /* translate the event, if desired */
slouken@8582
  1299
    posted = 0;
slouken@8582
  1300
#if !SDL_EVENTS_DISABLED
slouken@8582
  1301
    if (SDL_GetEventState(SDL_CONTROLLERAXISMOTION) == SDL_ENABLE) {
slouken@8582
  1302
        SDL_Event event;
slouken@8582
  1303
        event.type = SDL_CONTROLLERAXISMOTION;
slouken@8582
  1304
        event.caxis.which = gamecontroller->joystick->instance_id;
slouken@8582
  1305
        event.caxis.axis = axis;
slouken@8582
  1306
        event.caxis.value = value;
slouken@8582
  1307
        posted = SDL_PushEvent(&event) == 1;
slouken@8582
  1308
    }
slouken@8582
  1309
#endif /* !SDL_EVENTS_DISABLED */
slouken@8582
  1310
    return (posted);
slouken@8582
  1311
}
slouken@8582
  1312
slouken@8582
  1313
slouken@8582
  1314
/*
slouken@8582
  1315
 * Event filter to transform joystick events into appropriate game controller ones
slouken@8582
  1316
 */
slouken@8582
  1317
int
slouken@8582
  1318
SDL_PrivateGameControllerButton(SDL_GameController * gamecontroller, SDL_GameControllerButton button, Uint8 state)
slouken@8582
  1319
{
slouken@8582
  1320
    int posted;
slouken@8582
  1321
#if !SDL_EVENTS_DISABLED
slouken@8582
  1322
    SDL_Event event;
slouken@8582
  1323
slouken@8772
  1324
    if (button == SDL_CONTROLLER_BUTTON_INVALID)
slouken@8582
  1325
        return (0);
slouken@8582
  1326
slouken@8582
  1327
    switch (state) {
slouken@8582
  1328
    case SDL_PRESSED:
slouken@8582
  1329
        event.type = SDL_CONTROLLERBUTTONDOWN;
slouken@8582
  1330
        break;
slouken@8582
  1331
    case SDL_RELEASED:
slouken@8582
  1332
        event.type = SDL_CONTROLLERBUTTONUP;
slouken@8582
  1333
        break;
slouken@8582
  1334
    default:
slouken@8582
  1335
        /* Invalid state -- bail */
slouken@8582
  1336
        return (0);
slouken@8582
  1337
    }
slouken@8582
  1338
#endif /* !SDL_EVENTS_DISABLED */
slouken@8582
  1339
slouken@8582
  1340
    /* translate the event, if desired */
slouken@8582
  1341
    posted = 0;
slouken@8582
  1342
#if !SDL_EVENTS_DISABLED
slouken@8582
  1343
    if (SDL_GetEventState(event.type) == SDL_ENABLE) {
slouken@8582
  1344
        event.cbutton.which = gamecontroller->joystick->instance_id;
slouken@8582
  1345
        event.cbutton.button = button;
slouken@8582
  1346
        event.cbutton.state = state;
slouken@8582
  1347
        posted = SDL_PushEvent(&event) == 1;
slouken@8582
  1348
    }
slouken@8582
  1349
#endif /* !SDL_EVENTS_DISABLED */
slouken@8582
  1350
    return (posted);
slouken@8582
  1351
}
slouken@8582
  1352
slouken@8582
  1353
/*
slouken@8582
  1354
 * Turn off controller events
slouken@8582
  1355
 */
slouken@8582
  1356
int
slouken@8582
  1357
SDL_GameControllerEventState(int state)
slouken@8582
  1358
{
slouken@8582
  1359
#if SDL_EVENTS_DISABLED
slouken@8582
  1360
    return SDL_IGNORE;
slouken@8582
  1361
#else
slouken@8582
  1362
    const Uint32 event_list[] = {
slouken@8582
  1363
        SDL_CONTROLLERAXISMOTION, SDL_CONTROLLERBUTTONDOWN, SDL_CONTROLLERBUTTONUP,
slouken@8582
  1364
        SDL_CONTROLLERDEVICEADDED, SDL_CONTROLLERDEVICEREMOVED, SDL_CONTROLLERDEVICEREMAPPED,
slouken@8582
  1365
    };
slouken@8582
  1366
    unsigned int i;
slouken@8582
  1367
slouken@8582
  1368
    switch (state) {
slouken@8582
  1369
    case SDL_QUERY:
slouken@8582
  1370
        state = SDL_IGNORE;
slouken@8582
  1371
        for (i = 0; i < SDL_arraysize(event_list); ++i) {
slouken@8582
  1372
            state = SDL_EventState(event_list[i], SDL_QUERY);
slouken@8582
  1373
            if (state == SDL_ENABLE) {
slouken@8582
  1374
                break;
slouken@8582
  1375
            }
slouken@8582
  1376
        }
slouken@8582
  1377
        break;
slouken@8582
  1378
    default:
slouken@8582
  1379
        for (i = 0; i < SDL_arraysize(event_list); ++i) {
slouken@8582
  1380
            SDL_EventState(event_list[i], state);
slouken@8582
  1381
        }
slouken@8582
  1382
        break;
slouken@8582
  1383
    }
slouken@8582
  1384
    return (state);
slouken@8582
  1385
#endif /* SDL_EVENTS_DISABLED */
slouken@8582
  1386
}
slouken@8582
  1387
slouken@8582
  1388
/* vi: set ts=4 sw=4 expandtab: */