src/joystick/SDL_gamecontroller.c
author Sam Lantinga <slouken@libsdl.org>
Fri, 26 Aug 2016 12:18:08 -0700
changeset 10226 cb13d22b7f09
parent 10225 3134026517cb
child 10423 c5b42350ccbb
permissions -rw-r--r--
Added SDL_PrivateJoystickAdded() and SDL_PrivateJoystickRemoved()
Updated the removal code to iterate over all joystick add messages instead of just the first one.
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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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#define k_nMaxReverseEntries 20
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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) break;
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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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                                /* Shift it to be 0 - 32767. */
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                                value = value / 2 + 16384;
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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) break;
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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",
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    "dpleft",
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    "dpright",
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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_GameControllerButton SDL_GameControllerGetButtonFromString(const char *pchString)
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{
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    int entry;
slouken@8772
   351
    if (!pchString || !pchString[0])
slouken@8582
   352
        return SDL_CONTROLLER_BUTTON_INVALID;
slouken@8582
   353
slouken@8772
   354
    for (entry = 0; map_StringForControllerButton[entry]; ++entry) {
slouken@8772
   355
        if (SDL_strcasecmp(pchString, map_StringForControllerButton[entry]) == 0)
slouken@8772
   356
            return entry;
slouken@8582
   357
    }
slouken@8582
   358
    return SDL_CONTROLLER_BUTTON_INVALID;
slouken@8582
   359
}
slouken@8582
   360
slouken@8582
   361
/*
slouken@8582
   362
 * convert an enum to its string equivalent
slouken@8582
   363
 */
slouken@8772
   364
const char* SDL_GameControllerGetStringForButton(SDL_GameControllerButton axis)
slouken@8582
   365
{
slouken@8772
   366
    if (axis > SDL_CONTROLLER_BUTTON_INVALID && axis < SDL_CONTROLLER_BUTTON_MAX) {
slouken@8582
   367
        return map_StringForControllerButton[axis];
slouken@8582
   368
    }
slouken@8582
   369
    return NULL;
slouken@8582
   370
}
slouken@8582
   371
slouken@8582
   372
/*
slouken@8582
   373
 * given a controller button name and a joystick name update our mapping structure with it
slouken@8582
   374
 */
slouken@8772
   375
void SDL_PrivateGameControllerParseButton(const char *szGameButton, const char *szJoystickButton, struct _SDL_ControllerMapping *pMapping)
slouken@8582
   376
{
slouken@8582
   377
    int iSDLButton = 0;
slouken@8582
   378
    SDL_GameControllerButton button;
slouken@8582
   379
    SDL_GameControllerAxis axis;
slouken@8772
   380
    button = SDL_GameControllerGetButtonFromString(szGameButton);
slouken@8772
   381
    axis = SDL_GameControllerGetAxisFromString(szGameButton);
slouken@8772
   382
    iSDLButton = SDL_atoi(&szJoystickButton[1]);
slouken@8582
   383
slouken@8772
   384
    if (szJoystickButton[0] == 'a') {
slouken@8772
   385
        if (iSDLButton >= k_nMaxReverseEntries) {
slouken@8772
   386
            SDL_SetError("Axis index too large: %d", iSDLButton);
slouken@8582
   387
            return;
slouken@8582
   388
        }
slouken@8772
   389
        if (axis != SDL_CONTROLLER_AXIS_INVALID) {
slouken@8582
   390
            pMapping->axes[ axis ] = iSDLButton;
slouken@8582
   391
            pMapping->raxes[ iSDLButton ] = axis;
slouken@8772
   392
        } else if (button != SDL_CONTROLLER_BUTTON_INVALID) {
slouken@8582
   393
            pMapping->axesasbutton[ button ] = iSDLButton;
slouken@8582
   394
            pMapping->raxesasbutton[ iSDLButton ] = button;
slouken@8772
   395
        } else {
slouken@8772
   396
            SDL_assert(!"How did we get here?");
slouken@8582
   397
        }
slouken@8582
   398
slouken@8772
   399
    } else if (szJoystickButton[0] == 'b') {
slouken@8772
   400
        if (iSDLButton >= k_nMaxReverseEntries) {
slouken@8772
   401
            SDL_SetError("Button index too large: %d", iSDLButton);
slouken@8582
   402
            return;
slouken@8582
   403
        }
slouken@8772
   404
        if (button != SDL_CONTROLLER_BUTTON_INVALID) {
slouken@8582
   405
            pMapping->buttons[ button ] = iSDLButton;
slouken@8582
   406
            pMapping->rbuttons[ iSDLButton ] = button;
slouken@8772
   407
        } else if (axis != SDL_CONTROLLER_AXIS_INVALID) {
slouken@8582
   408
            pMapping->buttonasaxis[ axis ] = iSDLButton;
slouken@8582
   409
            pMapping->rbuttonasaxis[ iSDLButton ] = axis;
slouken@8772
   410
        } else {
slouken@8772
   411
            SDL_assert(!"How did we get here?");
slouken@8582
   412
        }
slouken@8772
   413
    } else if (szJoystickButton[0] == 'h') {
slouken@8772
   414
        int hat = SDL_atoi(&szJoystickButton[1]);
slouken@8772
   415
        int mask = SDL_atoi(&szJoystickButton[3]);
slouken@8582
   416
        if (hat >= 4) {
slouken@8772
   417
            SDL_SetError("Hat index too large: %d", iSDLButton);
slouken@8582
   418
        }
slouken@8582
   419
slouken@8772
   420
        if (button != SDL_CONTROLLER_BUTTON_INVALID) {
slouken@8582
   421
            int ridx;
slouken@8582
   422
            pMapping->hatasbutton[ button ].hat = hat;
slouken@8582
   423
            pMapping->hatasbutton[ button ].mask = mask;
slouken@8582
   424
            ridx = (hat << 4) | mask;
slouken@8582
   425
            pMapping->rhatasbutton[ ridx ] = button;
slouken@8772
   426
        } else if (axis != SDL_CONTROLLER_AXIS_INVALID) {
slouken@8772
   427
            SDL_assert(!"Support hat as axis");
slouken@8772
   428
        } else {
slouken@8772
   429
            SDL_assert(!"How did we get here?");
slouken@8582
   430
        }
slouken@8582
   431
    }
slouken@8582
   432
}
slouken@8582
   433
slouken@8582
   434
slouken@8582
   435
/*
slouken@8582
   436
 * given a controller mapping string update our mapping object
slouken@8582
   437
 */
slouken@8582
   438
static void
slouken@8772
   439
SDL_PrivateGameControllerParseControllerConfigString(struct _SDL_ControllerMapping *pMapping, const char *pchString)
slouken@8582
   440
{
slouken@8582
   441
    char szGameButton[20];
slouken@8582
   442
    char szJoystickButton[20];
slouken@8582
   443
    SDL_bool bGameButton = SDL_TRUE;
slouken@8582
   444
    int i = 0;
slouken@8582
   445
    const char *pchPos = pchString;
slouken@8582
   446
slouken@8772
   447
    SDL_memset(szGameButton, 0x0, sizeof(szGameButton));
slouken@8772
   448
    SDL_memset(szJoystickButton, 0x0, sizeof(szJoystickButton));
slouken@8582
   449
slouken@8772
   450
    while (pchPos && *pchPos) {
slouken@8772
   451
        if (*pchPos == ':') {
slouken@8582
   452
            i = 0;
slouken@8582
   453
            bGameButton = SDL_FALSE;
slouken@8772
   454
        } else if (*pchPos == ' ') {
slouken@8582
   455
slouken@8772
   456
        } else if (*pchPos == ',') {
slouken@8582
   457
            i = 0;
slouken@8582
   458
            bGameButton = SDL_TRUE;
slouken@8772
   459
            SDL_PrivateGameControllerParseButton(szGameButton, szJoystickButton, pMapping);
slouken@8772
   460
            SDL_memset(szGameButton, 0x0, sizeof(szGameButton));
slouken@8772
   461
            SDL_memset(szJoystickButton, 0x0, sizeof(szJoystickButton));
slouken@8582
   462
slouken@8772
   463
        } else if (bGameButton) {
slouken@8772
   464
            if (i >= sizeof(szGameButton)) {
slouken@8772
   465
                SDL_SetError("Button name too large: %s", szGameButton);
slouken@8582
   466
                return;
slouken@8582
   467
            }
slouken@8582
   468
            szGameButton[i] = *pchPos;
slouken@8582
   469
            i++;
slouken@8772
   470
        } else {
slouken@8772
   471
            if (i >= sizeof(szJoystickButton)) {
slouken@8772
   472
                SDL_SetError("Joystick button name too large: %s", szJoystickButton);
slouken@8582
   473
                return;
slouken@8582
   474
            }
slouken@8582
   475
            szJoystickButton[i] = *pchPos;
slouken@8582
   476
            i++;
slouken@8582
   477
        }
slouken@8582
   478
        pchPos++;
slouken@8582
   479
    }
slouken@8582
   480
slouken@8772
   481
    SDL_PrivateGameControllerParseButton(szGameButton, szJoystickButton, pMapping);
slouken@8582
   482
slouken@8582
   483
}
slouken@8582
   484
slouken@8582
   485
/*
slouken@8582
   486
 * Make a new button mapping struct
slouken@8582
   487
 */
slouken@8772
   488
void SDL_PrivateLoadButtonMapping(struct _SDL_ControllerMapping *pMapping, SDL_JoystickGUID guid, const char *pchName, const char *pchMapping)
slouken@8582
   489
{
slouken@8582
   490
    int j;
slouken@8582
   491
slouken@8582
   492
    pMapping->guid = guid;
slouken@8582
   493
    pMapping->name = pchName;
slouken@8582
   494
slouken@8582
   495
    /* set all the button mappings to non defaults */
slouken@8772
   496
    for (j = 0; j < SDL_CONTROLLER_AXIS_MAX; j++) {
slouken@8582
   497
        pMapping->axes[j] = -1;
slouken@8582
   498
        pMapping->buttonasaxis[j] = -1;
slouken@8582
   499
    }
slouken@8772
   500
    for (j = 0; j < SDL_CONTROLLER_BUTTON_MAX; j++) {
slouken@8582
   501
        pMapping->buttons[j] = -1;
slouken@8582
   502
        pMapping->axesasbutton[j] = -1;
slouken@8582
   503
        pMapping->hatasbutton[j].hat = -1;
slouken@8582
   504
    }
slouken@8582
   505
slouken@8772
   506
    for (j = 0; j < k_nMaxReverseEntries; j++) {
slouken@8582
   507
        pMapping->raxes[j] = SDL_CONTROLLER_AXIS_INVALID;
slouken@8582
   508
        pMapping->rbuttonasaxis[j] = SDL_CONTROLLER_AXIS_INVALID;
slouken@8582
   509
        pMapping->rbuttons[j] = SDL_CONTROLLER_BUTTON_INVALID;
slouken@8582
   510
        pMapping->raxesasbutton[j] = SDL_CONTROLLER_BUTTON_INVALID;
slouken@8582
   511
    }
slouken@8582
   512
slouken@8772
   513
    for (j = 0; j < k_nMaxHatEntries; j++) {
slouken@8582
   514
        pMapping->rhatasbutton[j] = SDL_CONTROLLER_BUTTON_INVALID;
slouken@8582
   515
    }
slouken@8582
   516
slouken@8772
   517
    SDL_PrivateGameControllerParseControllerConfigString(pMapping, pchMapping);
slouken@8582
   518
}
slouken@8582
   519
slouken@8582
   520
slouken@8582
   521
/*
slouken@8582
   522
 * grab the guid string from a mapping string
slouken@8582
   523
 */
slouken@8772
   524
char *SDL_PrivateGetControllerGUIDFromMappingString(const char *pMapping)
slouken@8582
   525
{
slouken@8772
   526
    const char *pFirstComma = SDL_strchr(pMapping, ',');
slouken@8772
   527
    if (pFirstComma) {
slouken@8772
   528
        char *pchGUID = SDL_malloc(pFirstComma - pMapping + 1);
slouken@8772
   529
        if (!pchGUID) {
slouken@8582
   530
            SDL_OutOfMemory();
slouken@8582
   531
            return NULL;
slouken@8582
   532
        }
slouken@8772
   533
        SDL_memcpy(pchGUID, pMapping, pFirstComma - pMapping);
slouken@8582
   534
        pchGUID[ pFirstComma - pMapping ] = 0;
slouken@8582
   535
        return pchGUID;
slouken@8582
   536
    }
slouken@8582
   537
    return NULL;
slouken@8582
   538
}
slouken@8582
   539
slouken@8582
   540
slouken@8582
   541
/*
slouken@8582
   542
 * grab the name string from a mapping string
slouken@8582
   543
 */
slouken@8772
   544
char *SDL_PrivateGetControllerNameFromMappingString(const char *pMapping)
slouken@8582
   545
{
slouken@8582
   546
    const char *pFirstComma, *pSecondComma;
slouken@8582
   547
    char *pchName;
slouken@8582
   548
slouken@8772
   549
    pFirstComma = SDL_strchr(pMapping, ',');
slouken@8772
   550
    if (!pFirstComma)
slouken@8582
   551
        return NULL;
slouken@8582
   552
slouken@8772
   553
    pSecondComma = SDL_strchr(pFirstComma + 1, ',');
slouken@8772
   554
    if (!pSecondComma)
slouken@8582
   555
        return NULL;
slouken@8582
   556
slouken@8772
   557
    pchName = SDL_malloc(pSecondComma - pFirstComma);
slouken@8772
   558
    if (!pchName) {
slouken@8582
   559
        SDL_OutOfMemory();
slouken@8582
   560
        return NULL;
slouken@8582
   561
    }
slouken@8772
   562
    SDL_memcpy(pchName, pFirstComma + 1, pSecondComma - pFirstComma);
slouken@8582
   563
    pchName[ pSecondComma - pFirstComma - 1 ] = 0;
slouken@8582
   564
    return pchName;
slouken@8582
   565
}
slouken@8582
   566
slouken@8582
   567
slouken@8582
   568
/*
slouken@8582
   569
 * grab the button mapping string from a mapping string
slouken@8582
   570
 */
slouken@8772
   571
char *SDL_PrivateGetControllerMappingFromMappingString(const char *pMapping)
slouken@8582
   572
{
slouken@8582
   573
    const char *pFirstComma, *pSecondComma;
slouken@8582
   574
slouken@8772
   575
    pFirstComma = SDL_strchr(pMapping, ',');
slouken@8772
   576
    if (!pFirstComma)
slouken@8582
   577
        return NULL;
slouken@8582
   578
slouken@8772
   579
    pSecondComma = SDL_strchr(pFirstComma + 1, ',');
slouken@8772
   580
    if (!pSecondComma)
slouken@8582
   581
        return NULL;
slouken@8582
   582
slouken@8582
   583
    return SDL_strdup(pSecondComma + 1); /* mapping is everything after the 3rd comma */
slouken@8582
   584
}
slouken@8582
   585
slouken@9956
   586
/*
slouken@9956
   587
 * Helper function to refresh a mapping
slouken@9956
   588
 */
slouken@8772
   589
void SDL_PrivateGameControllerRefreshMapping(ControllerMapping_t *pControllerMapping)
slouken@8582
   590
{
slouken@8582
   591
    SDL_GameController *gamecontrollerlist = SDL_gamecontrollers;
slouken@8772
   592
    while (gamecontrollerlist) {
slouken@8772
   593
        if (!SDL_memcmp(&gamecontrollerlist->mapping.guid, &pControllerMapping->guid, sizeof(pControllerMapping->guid))) {
slouken@8582
   594
            SDL_Event event;
slouken@8582
   595
            event.type = SDL_CONTROLLERDEVICEREMAPPED;
slouken@8582
   596
            event.cdevice.which = gamecontrollerlist->joystick->instance_id;
slouken@8582
   597
            SDL_PushEvent(&event);
slouken@8582
   598
slouken@8582
   599
            /* Not really threadsafe.  Should this lock access within SDL_GameControllerEventWatcher? */
slouken@8582
   600
            SDL_PrivateLoadButtonMapping(&gamecontrollerlist->mapping, pControllerMapping->guid, pControllerMapping->name, pControllerMapping->mapping);
slouken@8582
   601
        }
slouken@8582
   602
slouken@8582
   603
        gamecontrollerlist = gamecontrollerlist->next;
slouken@8582
   604
    }
slouken@8582
   605
}
slouken@8582
   606
slouken@8582
   607
/*
slouken@9956
   608
 * Helper function to add a mapping for a guid
slouken@9956
   609
 */
slouken@9956
   610
static ControllerMapping_t *
slouken@9956
   611
SDL_PrivateAddMappingForGUID(SDL_JoystickGUID jGUID, const char *mappingString, SDL_bool *existing)
slouken@9956
   612
{
slouken@9956
   613
    char *pchName;
slouken@9956
   614
    char *pchMapping;
slouken@9956
   615
    ControllerMapping_t *pControllerMapping;
slouken@9956
   616
slouken@9956
   617
    pchName = SDL_PrivateGetControllerNameFromMappingString(mappingString);
slouken@9956
   618
    if (!pchName) {
slouken@9956
   619
        SDL_SetError("Couldn't parse name from %s", mappingString);
slouken@9956
   620
        return NULL;
slouken@9956
   621
    }
slouken@9956
   622
slouken@9956
   623
    pchMapping = SDL_PrivateGetControllerMappingFromMappingString(mappingString);
slouken@9956
   624
    if (!pchMapping) {
slouken@9956
   625
        SDL_free(pchName);
slouken@9956
   626
        SDL_SetError("Couldn't parse %s", mappingString);
slouken@9956
   627
        return NULL;
slouken@9956
   628
    }
slouken@9956
   629
slouken@9956
   630
    pControllerMapping = SDL_PrivateGetControllerMappingForGUID(&jGUID);
slouken@9956
   631
    if (pControllerMapping) {
slouken@9956
   632
        /* Update existing mapping */
slouken@9956
   633
        SDL_free(pControllerMapping->name);
slouken@9956
   634
        pControllerMapping->name = pchName;
slouken@9956
   635
        SDL_free(pControllerMapping->mapping);
slouken@9956
   636
        pControllerMapping->mapping = pchMapping;
slouken@9956
   637
        /* refresh open controllers */
slouken@9956
   638
        SDL_PrivateGameControllerRefreshMapping(pControllerMapping);
slouken@9956
   639
        *existing = SDL_TRUE;
slouken@9956
   640
    } else {
slouken@9956
   641
        pControllerMapping = SDL_malloc(sizeof(*pControllerMapping));
slouken@9956
   642
        if (!pControllerMapping) {
slouken@9956
   643
            SDL_free(pchName);
slouken@9956
   644
            SDL_free(pchMapping);
slouken@9956
   645
            SDL_OutOfMemory();
slouken@9956
   646
            return NULL;
slouken@9956
   647
        }
slouken@9956
   648
        pControllerMapping->guid = jGUID;
slouken@9956
   649
        pControllerMapping->name = pchName;
slouken@9956
   650
        pControllerMapping->mapping = pchMapping;
slouken@9956
   651
        pControllerMapping->next = s_pSupportedControllers;
slouken@9956
   652
        s_pSupportedControllers = pControllerMapping;
slouken@9956
   653
        *existing = SDL_FALSE;
slouken@9956
   654
    }
slouken@9956
   655
    return pControllerMapping;
slouken@9956
   656
}
slouken@9956
   657
slouken@9956
   658
/*
slouken@9956
   659
 * Helper function to determine pre-calculated offset to certain joystick mappings
slouken@9956
   660
 */
slouken@9956
   661
ControllerMapping_t *SDL_PrivateGetControllerMapping(int device_index)
slouken@9956
   662
{
slouken@9956
   663
    SDL_JoystickGUID jGUID = SDL_JoystickGetDeviceGUID(device_index);
slouken@9956
   664
    ControllerMapping_t *mapping;
slouken@9956
   665
slouken@9956
   666
    mapping = SDL_PrivateGetControllerMappingForGUID(&jGUID);
slouken@9956
   667
#if SDL_JOYSTICK_XINPUT
slouken@9956
   668
    if (!mapping && SDL_SYS_IsXInputGamepad_DeviceIndex(device_index)) {
slouken@9956
   669
        mapping = s_pXInputMapping;
slouken@9956
   670
    }
slouken@9956
   671
#endif
slouken@9956
   672
#if defined(SDL_JOYSTICK_EMSCRIPTEN)
slouken@9956
   673
    if (!mapping && s_pEmscriptenMapping) {
slouken@9956
   674
        mapping = s_pEmscriptenMapping;
slouken@9956
   675
    }
slouken@9956
   676
#endif
slouken@9956
   677
#ifdef __LINUX__
slouken@9956
   678
    if (!mapping) {
slouken@9956
   679
        const char *name = SDL_JoystickNameForIndex(device_index);
slouken@9956
   680
        if (name) {
slouken@9956
   681
            if (SDL_strstr(name, "Xbox 360 Wireless Receiver")) {
slouken@9956
   682
                /* The Linux driver xpad.c maps the wireless dpad to buttons */
slouken@9956
   683
                SDL_bool existing;
slouken@9956
   684
                mapping = SDL_PrivateAddMappingForGUID(jGUID,
slouken@9956
   685
"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
   686
                              &existing);
slouken@9956
   687
            }
slouken@9956
   688
        }
slouken@9956
   689
    }
slouken@9956
   690
#endif /* __LINUX__ */
slouken@9956
   691
slouken@9956
   692
    if (!mapping) {
slouken@9956
   693
        const char *name = SDL_JoystickNameForIndex(device_index);
slouken@9956
   694
        if (name) {
slouken@9956
   695
            if (SDL_strstr(name, "Xbox") || SDL_strstr(name, "X-Box")) {
slouken@9956
   696
                mapping = s_pXInputMapping;
slouken@9956
   697
            }
slouken@9956
   698
        }
slouken@9956
   699
    }
slouken@9956
   700
    return mapping;
slouken@9956
   701
}
slouken@9956
   702
slouken@9956
   703
/*
slouken@8582
   704
 * Add or update an entry into the Mappings Database
slouken@8582
   705
 */
slouken@8582
   706
int
slouken@8772
   707
SDL_GameControllerAddMappingsFromRW(SDL_RWops * rw, int freerw)
gabomdq@8042
   708
{
gabomdq@8042
   709
    const char *platform = SDL_GetPlatform();
gabomdq@8042
   710
    int controllers = 0;
gabomdq@8042
   711
    char *buf, *line, *line_end, *tmp, *comma, line_platform[64];
gabomdq@8042
   712
    size_t db_size, platform_len;
gabomdq@8042
   713
    
gabomdq@8042
   714
    if (rw == NULL) {
gabomdq@8046
   715
        return SDL_SetError("Invalid RWops");
gabomdq@8042
   716
    }
slouken@8052
   717
    db_size = (size_t)SDL_RWsize(rw);
gabomdq@8042
   718
    
slouken@8052
   719
    buf = (char *)SDL_malloc(db_size + 1);
gabomdq@8042
   720
    if (buf == NULL) {
gabomdq@8046
   721
        if (freerw) {
gabomdq@8046
   722
            SDL_RWclose(rw);
gabomdq@8046
   723
        }
philipp@9194
   724
        return SDL_SetError("Could not allocate space to read DB into memory");
gabomdq@8042
   725
    }
gabomdq@8042
   726
    
gabomdq@8042
   727
    if (SDL_RWread(rw, buf, db_size, 1) != 1) {
gabomdq@8046
   728
        if (freerw) {
gabomdq@8046
   729
            SDL_RWclose(rw);
gabomdq@8046
   730
        }
gabomdq@8042
   731
        SDL_free(buf);
gabomdq@8042
   732
        return SDL_SetError("Could not read DB");
gabomdq@8042
   733
    }
gabomdq@8046
   734
    
gabomdq@8046
   735
    if (freerw) {
gabomdq@8046
   736
        SDL_RWclose(rw);
gabomdq@8046
   737
    }
gabomdq@8042
   738
    
gabomdq@8042
   739
    buf[db_size] = '\0';
gabomdq@8042
   740
    line = buf;
gabomdq@8042
   741
    
gabomdq@8042
   742
    while (line < buf + db_size) {
slouken@8772
   743
        line_end = SDL_strchr(line, '\n');
gabomdq@8042
   744
        if (line_end != NULL) {
gabomdq@8042
   745
            *line_end = '\0';
slouken@8772
   746
        } else {
gabomdq@8042
   747
            line_end = buf + db_size;
gabomdq@8042
   748
        }
gabomdq@8042
   749
        
gabomdq@8042
   750
        /* Extract and verify the platform */
gabomdq@8042
   751
        tmp = SDL_strstr(line, SDL_CONTROLLER_PLATFORM_FIELD);
slouken@8772
   752
        if (tmp != NULL) {
gabomdq@8042
   753
            tmp += SDL_strlen(SDL_CONTROLLER_PLATFORM_FIELD);
gabomdq@8042
   754
            comma = SDL_strchr(tmp, ',');
gabomdq@8042
   755
            if (comma != NULL) {
gabomdq@8042
   756
                platform_len = comma - tmp + 1;
gabomdq@8042
   757
                if (platform_len + 1 < SDL_arraysize(line_platform)) {
gabomdq@8042
   758
                    SDL_strlcpy(line_platform, tmp, platform_len);
slouken@8772
   759
                    if (SDL_strncasecmp(line_platform, platform, platform_len) == 0 &&
slouken@8772
   760
                        SDL_GameControllerAddMapping(line) > 0) {
gabomdq@8042
   761
                        controllers++;
gabomdq@8042
   762
                    }
gabomdq@8042
   763
                }
gabomdq@8042
   764
            }
gabomdq@8042
   765
        }
gabomdq@8042
   766
        
gabomdq@8042
   767
        line = line_end + 1;
gabomdq@8042
   768
    }
gabomdq@8042
   769
gabomdq@8042
   770
    SDL_free(buf);
gabomdq@8042
   771
    return controllers;
gabomdq@8042
   772
}
gabomdq@8042
   773
gabomdq@8042
   774
/*
gabomdq@8042
   775
 * Add or update an entry into the Mappings Database
gabomdq@8042
   776
 */
gabomdq@8042
   777
int
slouken@8772
   778
SDL_GameControllerAddMapping(const char *mappingString)
slouken@8582
   779
{
slouken@8582
   780
    char *pchGUID;
slouken@8582
   781
    SDL_JoystickGUID jGUID;
slouken@8582
   782
    SDL_bool is_xinput_mapping = SDL_FALSE;
icculus@9278
   783
    SDL_bool is_emscripten_mapping = SDL_FALSE;
slouken@9956
   784
    SDL_bool existing = SDL_FALSE;
slouken@9956
   785
    ControllerMapping_t *pControllerMapping;
slouken@8582
   786
philipp@9198
   787
    if (!mappingString) {
philipp@9198
   788
        return SDL_InvalidParamError("mappingString");
philipp@9198
   789
    }
philipp@9198
   790
slouken@8772
   791
    pchGUID = SDL_PrivateGetControllerGUIDFromMappingString(mappingString);
slouken@8582
   792
    if (!pchGUID) {
philipp@8081
   793
        return SDL_SetError("Couldn't parse GUID from %s", mappingString);
slouken@8582
   794
    }
slouken@8772
   795
    if (!SDL_strcasecmp(pchGUID, "xinput")) {
slouken@8582
   796
        is_xinput_mapping = SDL_TRUE;
slouken@8582
   797
    }
icculus@9278
   798
    if (!SDL_strcasecmp(pchGUID, "emscripten")) {
icculus@9278
   799
        is_emscripten_mapping = SDL_TRUE;
icculus@9278
   800
    }
slouken@8582
   801
    jGUID = SDL_JoystickGetGUIDFromString(pchGUID);
slouken@8582
   802
    SDL_free(pchGUID);
slouken@8582
   803
slouken@9956
   804
    pControllerMapping = SDL_PrivateAddMappingForGUID(jGUID, mappingString, &existing);
slouken@9956
   805
    if (!pControllerMapping) {
slouken@9956
   806
        return -1;
slouken@8053
   807
    }
slouken@8582
   808
slouken@9956
   809
    if (existing) {
slouken@8582
   810
        return 0;
slouken@8582
   811
    } else {
slouken@8772
   812
        if (is_xinput_mapping) {
slouken@8582
   813
            s_pXInputMapping = pControllerMapping;
slouken@8582
   814
        }
icculus@9278
   815
        if (is_emscripten_mapping) {
icculus@9278
   816
            s_pEmscriptenMapping = pControllerMapping;
icculus@9278
   817
        }
slouken@8582
   818
        return 1;
slouken@8582
   819
    }
slouken@8582
   820
}
slouken@8582
   821
slouken@8582
   822
/*
slouken@8582
   823
 * Get the mapping string for this GUID
slouken@8582
   824
 */
slouken@8582
   825
char *
slouken@8772
   826
SDL_GameControllerMappingForGUID(SDL_JoystickGUID guid)
slouken@8582
   827
{
slouken@8582
   828
    char *pMappingString = NULL;
slouken@8582
   829
    ControllerMapping_t *mapping = SDL_PrivateGetControllerMappingForGUID(&guid);
slouken@8582
   830
    if (mapping) {
slouken@8582
   831
        char pchGUID[33];
slouken@8582
   832
        size_t needed;
slouken@8582
   833
        SDL_JoystickGetGUIDString(guid, pchGUID, sizeof(pchGUID));
slouken@8582
   834
        /* allocate enough memory for GUID + ',' + name + ',' + mapping + \0 */
slouken@8582
   835
        needed = SDL_strlen(pchGUID) + 1 + SDL_strlen(mapping->name) + 1 + SDL_strlen(mapping->mapping) + 1;
slouken@8772
   836
        pMappingString = SDL_malloc(needed);
philipp@9197
   837
        if (!pMappingString) {
philipp@9197
   838
            SDL_OutOfMemory();
philipp@9197
   839
            return NULL;
philipp@9197
   840
        }
slouken@8772
   841
        SDL_snprintf(pMappingString, needed, "%s,%s,%s", pchGUID, mapping->name, mapping->mapping);
slouken@8582
   842
    }
slouken@8582
   843
    return pMappingString;
slouken@8582
   844
}
slouken@8582
   845
slouken@8582
   846
/*
slouken@8582
   847
 * Get the mapping string for this device
slouken@8582
   848
 */
slouken@8582
   849
char *
slouken@8772
   850
SDL_GameControllerMapping(SDL_GameController * gamecontroller)
slouken@8582
   851
{
philipp@9196
   852
    if (!gamecontroller) {
philipp@9196
   853
        return NULL;
philipp@9196
   854
    }
philipp@9196
   855
slouken@8772
   856
    return SDL_GameControllerMappingForGUID(gamecontroller->mapping.guid);
slouken@8582
   857
}
slouken@8582
   858
slouken@8582
   859
static void
slouken@8582
   860
SDL_GameControllerLoadHints()
slouken@8582
   861
{
slouken@8582
   862
    const char *hint = SDL_GetHint(SDL_HINT_GAMECONTROLLERCONFIG);
slouken@8772
   863
    if (hint && hint[0]) {
slouken@8772
   864
        size_t nchHints = SDL_strlen(hint);
slouken@8772
   865
        char *pUserMappings = SDL_malloc(nchHints + 1);
slouken@8582
   866
        char *pTempMappings = pUserMappings;
slouken@8772
   867
        SDL_memcpy(pUserMappings, hint, nchHints);
slouken@8267
   868
        pUserMappings[nchHints] = '\0';
slouken@8772
   869
        while (pUserMappings) {
slouken@8582
   870
            char *pchNewLine = NULL;
slouken@8582
   871
slouken@8772
   872
            pchNewLine = SDL_strchr(pUserMappings, '\n');
slouken@8772
   873
            if (pchNewLine)
slouken@8582
   874
                *pchNewLine = '\0';
slouken@8582
   875
slouken@8772
   876
            SDL_GameControllerAddMapping(pUserMappings);
slouken@8582
   877
slouken@8772
   878
            if (pchNewLine) {
slouken@8582
   879
                pUserMappings = pchNewLine + 1;
slouken@8772
   880
            } else {
slouken@8582
   881
                pUserMappings = NULL;
slouken@8772
   882
            }
slouken@8582
   883
        }
slouken@8582
   884
        SDL_free(pTempMappings);
slouken@8582
   885
    }
slouken@8582
   886
}
slouken@8582
   887
slouken@8582
   888
/*
slouken@8582
   889
 * Initialize the game controller system, mostly load our DB of controller config mappings
slouken@8582
   890
 */
slouken@8582
   891
int
slouken@8582
   892
SDL_GameControllerInit(void)
slouken@8582
   893
{
slouken@8582
   894
    int i = 0;
slouken@8582
   895
    const char *pMappingString = NULL;
slouken@8582
   896
    pMappingString = s_ControllerMappings[i];
slouken@8772
   897
    while (pMappingString) {
slouken@8772
   898
        SDL_GameControllerAddMapping(pMappingString);
slouken@8582
   899
slouken@8582
   900
        i++;
slouken@8582
   901
        pMappingString = s_ControllerMappings[i];
slouken@8582
   902
    }
slouken@8582
   903
slouken@8582
   904
    /* load in any user supplied config */
slouken@8582
   905
    SDL_GameControllerLoadHints();
slouken@8582
   906
slouken@8582
   907
    /* watch for joy events and fire controller ones if needed */
slouken@8772
   908
    SDL_AddEventWatch(SDL_GameControllerEventWatcher, NULL);
slouken@8582
   909
slouken@8067
   910
    /* Send added events for controllers currently attached */
slouken@8067
   911
    for (i = 0; i < SDL_NumJoysticks(); ++i) {
slouken@8067
   912
        if (SDL_IsGameController(i)) {
slouken@8067
   913
            SDL_Event deviceevent;
slouken@8067
   914
            deviceevent.type = SDL_CONTROLLERDEVICEADDED;
slouken@8067
   915
            deviceevent.cdevice.which = i;
slouken@8067
   916
            SDL_PushEvent(&deviceevent);
slouken@8067
   917
        }
slouken@8067
   918
    }
slouken@8067
   919
slouken@8582
   920
    return (0);
slouken@8582
   921
}
slouken@8582
   922
slouken@8582
   923
slouken@8582
   924
/*
slouken@8582
   925
 * Get the implementation dependent name of a controller
slouken@8582
   926
 */
slouken@8582
   927
const char *
slouken@8582
   928
SDL_GameControllerNameForIndex(int device_index)
slouken@8582
   929
{
slouken@8582
   930
    ControllerMapping_t *pSupportedController =  SDL_PrivateGetControllerMapping(device_index);
slouken@8772
   931
    if (pSupportedController) {
slouken@8582
   932
        return pSupportedController->name;
slouken@8582
   933
    }
slouken@8582
   934
    return NULL;
slouken@8582
   935
}
slouken@8582
   936
slouken@8582
   937
slouken@8582
   938
/*
slouken@8582
   939
 * Return 1 if the joystick at this device index is a supported controller
slouken@8582
   940
 */
slouken@8582
   941
SDL_bool
slouken@8582
   942
SDL_IsGameController(int device_index)
slouken@8582
   943
{
slouken@8582
   944
    ControllerMapping_t *pSupportedController =  SDL_PrivateGetControllerMapping(device_index);
slouken@8772
   945
    if (pSupportedController) {
slouken@8582
   946
        return SDL_TRUE;
slouken@8582
   947
    }
slouken@8582
   948
slouken@8582
   949
    return SDL_FALSE;
slouken@8582
   950
}
slouken@8582
   951
slouken@8582
   952
/*
slouken@8582
   953
 * Open a controller for use - the index passed as an argument refers to
slouken@8582
   954
 * the N'th controller on the system.  This index is the value which will
slouken@8582
   955
 * identify this controller in future controller events.
slouken@8582
   956
 *
slouken@8582
   957
 * This function returns a controller identifier, or NULL if an error occurred.
slouken@8582
   958
 */
slouken@8582
   959
SDL_GameController *
slouken@8582
   960
SDL_GameControllerOpen(int device_index)
slouken@8582
   961
{
slouken@8582
   962
    SDL_GameController *gamecontroller;
slouken@8582
   963
    SDL_GameController *gamecontrollerlist;
slouken@8582
   964
    ControllerMapping_t *pSupportedController = NULL;
slouken@8582
   965
slouken@8582
   966
    if ((device_index < 0) || (device_index >= SDL_NumJoysticks())) {
slouken@8582
   967
        SDL_SetError("There are %d joysticks available", SDL_NumJoysticks());
slouken@8582
   968
        return (NULL);
slouken@8582
   969
    }
slouken@8582
   970
slouken@8582
   971
    gamecontrollerlist = SDL_gamecontrollers;
slouken@8582
   972
    /* If the controller is already open, return it */
slouken@8772
   973
    while (gamecontrollerlist) {
slouken@8772
   974
        if (SDL_SYS_GetInstanceIdOfDeviceIndex(device_index) == gamecontrollerlist->joystick->instance_id) {
slouken@8582
   975
                gamecontroller = gamecontrollerlist;
slouken@8582
   976
                ++gamecontroller->ref_count;
slouken@8582
   977
                return (gamecontroller);
slouken@8582
   978
        }
slouken@8582
   979
        gamecontrollerlist = gamecontrollerlist->next;
slouken@8582
   980
    }
slouken@8582
   981
slouken@8582
   982
    /* Find a controller mapping */
slouken@8582
   983
    pSupportedController =  SDL_PrivateGetControllerMapping(device_index);
slouken@8772
   984
    if (!pSupportedController) {
slouken@8772
   985
        SDL_SetError("Couldn't find mapping for device (%d)", device_index);
slouken@8582
   986
        return (NULL);
slouken@8582
   987
    }
slouken@8582
   988
slouken@8582
   989
    /* Create and initialize the joystick */
slouken@8582
   990
    gamecontroller = (SDL_GameController *) SDL_malloc((sizeof *gamecontroller));
slouken@8582
   991
    if (gamecontroller == NULL) {
slouken@8582
   992
        SDL_OutOfMemory();
slouken@8582
   993
        return NULL;
slouken@8582
   994
    }
slouken@8582
   995
slouken@8582
   996
    SDL_memset(gamecontroller, 0, (sizeof *gamecontroller));
slouken@8582
   997
    gamecontroller->joystick = SDL_JoystickOpen(device_index);
slouken@8772
   998
    if (!gamecontroller->joystick) {
slouken@8582
   999
        SDL_free(gamecontroller);
slouken@8582
  1000
        return NULL;
slouken@8582
  1001
    }
slouken@8582
  1002
slouken@8772
  1003
    SDL_PrivateLoadButtonMapping(&gamecontroller->mapping, pSupportedController->guid, pSupportedController->name, pSupportedController->mapping);
slouken@8582
  1004
slouken@8582
  1005
    /* Add joystick to list */
slouken@8582
  1006
    ++gamecontroller->ref_count;
slouken@8582
  1007
    /* Link the joystick in the list */
slouken@8582
  1008
    gamecontroller->next = SDL_gamecontrollers;
slouken@8582
  1009
    SDL_gamecontrollers = gamecontroller;
slouken@8582
  1010
slouken@8772
  1011
    SDL_SYS_JoystickUpdate(gamecontroller->joystick);
slouken@8582
  1012
slouken@8582
  1013
    return (gamecontroller);
slouken@8582
  1014
}
slouken@8582
  1015
slouken@8582
  1016
/*
slouken@8582
  1017
 * Manually pump for controller updates.
slouken@8582
  1018
 */
slouken@8582
  1019
void
slouken@8582
  1020
SDL_GameControllerUpdate(void)
slouken@8582
  1021
{
slouken@8582
  1022
    /* Just for API completeness; the joystick API does all the work. */
slouken@8582
  1023
    SDL_JoystickUpdate();
slouken@8582
  1024
}
slouken@8582
  1025
slouken@8582
  1026
slouken@8582
  1027
/*
slouken@8582
  1028
 * Get the current state of an axis control on a controller
slouken@8582
  1029
 */
slouken@8582
  1030
Sint16
slouken@8582
  1031
SDL_GameControllerGetAxis(SDL_GameController * gamecontroller, SDL_GameControllerAxis axis)
slouken@8582
  1032
{
slouken@8772
  1033
    if (!gamecontroller)
slouken@8582
  1034
        return 0;
slouken@8582
  1035
slouken@8772
  1036
    if (gamecontroller->mapping.axes[axis] >= 0) {
slouken@8772
  1037
        Sint16 value = (SDL_JoystickGetAxis(gamecontroller->joystick, gamecontroller->mapping.axes[axis]));
slouken@8772
  1038
        switch (axis) {
slouken@8582
  1039
            case SDL_CONTROLLER_AXIS_TRIGGERLEFT:
slouken@8582
  1040
            case SDL_CONTROLLER_AXIS_TRIGGERRIGHT:
slouken@8582
  1041
                /* Shift it to be 0 - 32767. */
slouken@8582
  1042
                value = value / 2 + 16384;
slouken@8582
  1043
            default:
slouken@8582
  1044
                break;
slouken@8582
  1045
        }
slouken@8582
  1046
        return value;
slouken@8772
  1047
    } else if (gamecontroller->mapping.buttonasaxis[axis] >= 0) {
slouken@8582
  1048
        Uint8 value;
slouken@8772
  1049
        value = SDL_JoystickGetButton(gamecontroller->joystick, gamecontroller->mapping.buttonasaxis[axis]);
slouken@8772
  1050
        if (value > 0)
slouken@8582
  1051
            return 32767;
slouken@8582
  1052
        return 0;
slouken@8582
  1053
    }
slouken@8582
  1054
    return 0;
slouken@8582
  1055
}
slouken@8582
  1056
slouken@8582
  1057
slouken@8582
  1058
/*
slouken@8582
  1059
 * Get the current state of a button on a controller
slouken@8582
  1060
 */
slouken@8582
  1061
Uint8
slouken@8582
  1062
SDL_GameControllerGetButton(SDL_GameController * gamecontroller, SDL_GameControllerButton button)
slouken@8582
  1063
{
slouken@8772
  1064
    if (!gamecontroller)
slouken@8582
  1065
        return 0;
slouken@8582
  1066
slouken@8772
  1067
    if (gamecontroller->mapping.buttons[button] >= 0) {
slouken@8772
  1068
        return (SDL_JoystickGetButton(gamecontroller->joystick, gamecontroller->mapping.buttons[button]));
slouken@8772
  1069
    } else if (gamecontroller->mapping.axesasbutton[button] >= 0) {
slouken@8582
  1070
        Sint16 value;
slouken@8772
  1071
        value = SDL_JoystickGetAxis(gamecontroller->joystick, gamecontroller->mapping.axesasbutton[button]);
slouken@8772
  1072
        if (ABS(value) > 32768/2)
slouken@8582
  1073
            return 1;
slouken@8582
  1074
        return 0;
slouken@8772
  1075
    } else if (gamecontroller->mapping.hatasbutton[button].hat >= 0) {
slouken@8582
  1076
        Uint8 value;
slouken@8772
  1077
        value = SDL_JoystickGetHat(gamecontroller->joystick, gamecontroller->mapping.hatasbutton[button].hat);
slouken@8582
  1078
slouken@8772
  1079
        if (value & gamecontroller->mapping.hatasbutton[button].mask)
slouken@8582
  1080
            return 1;
slouken@8582
  1081
        return 0;
slouken@8582
  1082
    }
slouken@8582
  1083
slouken@8582
  1084
    return 0;
slouken@8582
  1085
}
slouken@8582
  1086
slouken@8582
  1087
/*
slouken@8582
  1088
 * Return if the joystick in question is currently attached to the system,
slouken@8582
  1089
 *  \return 0 if not plugged in, 1 if still present.
slouken@8582
  1090
 */
slouken@8582
  1091
SDL_bool
slouken@8772
  1092
SDL_GameControllerGetAttached(SDL_GameController * gamecontroller)
slouken@8582
  1093
{
slouken@8772
  1094
    if (!gamecontroller)
slouken@8582
  1095
        return SDL_FALSE;
slouken@8582
  1096
slouken@8582
  1097
    return SDL_JoystickGetAttached(gamecontroller->joystick);
slouken@8582
  1098
}
slouken@8582
  1099
slouken@8582
  1100
slouken@8582
  1101
const char *
slouken@8582
  1102
SDL_GameControllerName(SDL_GameController * gamecontroller)
slouken@8582
  1103
{
slouken@8772
  1104
    if (!gamecontroller)
slouken@8582
  1105
        return NULL;
slouken@8582
  1106
slouken@8582
  1107
    return (gamecontroller->mapping.name);
slouken@8582
  1108
}
slouken@8582
  1109
slouken@8582
  1110
slouken@8582
  1111
/*
slouken@8582
  1112
 * Get the joystick for this controller
slouken@8582
  1113
 */
slouken@8582
  1114
SDL_Joystick *SDL_GameControllerGetJoystick(SDL_GameController * gamecontroller)
slouken@8582
  1115
{
slouken@8772
  1116
    if (!gamecontroller)
slouken@8582
  1117
        return NULL;
slouken@8582
  1118
slouken@8582
  1119
    return gamecontroller->joystick;
slouken@8582
  1120
}
slouken@8582
  1121
icculus@9916
  1122
icculus@9916
  1123
/*
icculus@9916
  1124
 * Find the SDL_GameController that owns this instance id
icculus@9916
  1125
 */
icculus@9916
  1126
SDL_GameController *
icculus@9916
  1127
SDL_GameControllerFromInstanceID(SDL_JoystickID joyid)
icculus@9916
  1128
{
icculus@9916
  1129
    SDL_GameController *gamecontroller = SDL_gamecontrollers;
icculus@9916
  1130
    while (gamecontroller) {
icculus@9916
  1131
        if (gamecontroller->joystick->instance_id == joyid) {
icculus@9916
  1132
            return gamecontroller;
icculus@9916
  1133
        }
icculus@9916
  1134
        gamecontroller = gamecontroller->next;
icculus@9916
  1135
    }
icculus@9916
  1136
icculus@9916
  1137
    return NULL;
icculus@9916
  1138
}
icculus@9916
  1139
icculus@9916
  1140
slouken@8582
  1141
/**
slouken@8582
  1142
 * Get the SDL joystick layer binding for this controller axis mapping
slouken@8582
  1143
 */
slouken@8582
  1144
SDL_GameControllerButtonBind SDL_GameControllerGetBindForAxis(SDL_GameController * gamecontroller, SDL_GameControllerAxis axis)
slouken@8582
  1145
{
slouken@8582
  1146
    SDL_GameControllerButtonBind bind;
slouken@8772
  1147
    SDL_memset(&bind, 0x0, sizeof(bind));
slouken@8582
  1148
slouken@8772
  1149
    if (!gamecontroller || axis == SDL_CONTROLLER_AXIS_INVALID)
slouken@8582
  1150
        return bind;
slouken@8582
  1151
slouken@8772
  1152
    if (gamecontroller->mapping.axes[axis] >= 0) {
slouken@8582
  1153
        bind.bindType = SDL_CONTROLLER_BINDTYPE_AXIS;
slouken@8582
  1154
        bind.value.button = gamecontroller->mapping.axes[axis];
slouken@8772
  1155
    } else if (gamecontroller->mapping.buttonasaxis[axis] >= 0) {
slouken@8582
  1156
        bind.bindType = SDL_CONTROLLER_BINDTYPE_BUTTON;
slouken@8582
  1157
        bind.value.button = gamecontroller->mapping.buttonasaxis[axis];
slouken@8582
  1158
    }
slouken@8582
  1159
slouken@8582
  1160
    return bind;
slouken@8582
  1161
}
slouken@8582
  1162
slouken@8582
  1163
slouken@8582
  1164
/**
slouken@8582
  1165
 * Get the SDL joystick layer binding for this controller button mapping
slouken@8582
  1166
 */
slouken@8582
  1167
SDL_GameControllerButtonBind SDL_GameControllerGetBindForButton(SDL_GameController * gamecontroller, SDL_GameControllerButton button)
slouken@8582
  1168
{
slouken@8582
  1169
    SDL_GameControllerButtonBind bind;
slouken@8772
  1170
    SDL_memset(&bind, 0x0, sizeof(bind));
slouken@8582
  1171
slouken@8772
  1172
    if (!gamecontroller || button == SDL_CONTROLLER_BUTTON_INVALID)
slouken@8582
  1173
        return bind;
slouken@8582
  1174
slouken@8772
  1175
    if (gamecontroller->mapping.buttons[button] >= 0) {
slouken@8582
  1176
        bind.bindType = SDL_CONTROLLER_BINDTYPE_BUTTON;
slouken@8582
  1177
        bind.value.button = gamecontroller->mapping.buttons[button];
slouken@8772
  1178
    } else if (gamecontroller->mapping.axesasbutton[button] >= 0) {
slouken@8582
  1179
        bind.bindType = SDL_CONTROLLER_BINDTYPE_AXIS;
slouken@8582
  1180
        bind.value.axis = gamecontroller->mapping.axesasbutton[button];
slouken@8772
  1181
    } else if (gamecontroller->mapping.hatasbutton[button].hat >= 0) {
slouken@8582
  1182
        bind.bindType = SDL_CONTROLLER_BINDTYPE_HAT;
slouken@8582
  1183
        bind.value.hat.hat = gamecontroller->mapping.hatasbutton[button].hat;
slouken@8582
  1184
        bind.value.hat.hat_mask = gamecontroller->mapping.hatasbutton[button].mask;
slouken@8582
  1185
    }
slouken@8582
  1186
slouken@8582
  1187
    return bind;
slouken@8582
  1188
}
slouken@8582
  1189
slouken@8582
  1190
slouken@8582
  1191
void
slouken@8582
  1192
SDL_GameControllerClose(SDL_GameController * gamecontroller)
slouken@8582
  1193
{
slouken@8582
  1194
    SDL_GameController *gamecontrollerlist, *gamecontrollerlistprev;
slouken@8582
  1195
slouken@8772
  1196
    if (!gamecontroller)
slouken@8582
  1197
        return;
slouken@8582
  1198
slouken@8582
  1199
    /* First decrement ref count */
slouken@8582
  1200
    if (--gamecontroller->ref_count > 0) {
slouken@8582
  1201
        return;
slouken@8582
  1202
    }
slouken@8582
  1203
slouken@8772
  1204
    SDL_JoystickClose(gamecontroller->joystick);
slouken@8582
  1205
slouken@8582
  1206
    gamecontrollerlist = SDL_gamecontrollers;
slouken@8582
  1207
    gamecontrollerlistprev = NULL;
slouken@8772
  1208
    while (gamecontrollerlist) {
slouken@8772
  1209
        if (gamecontroller == gamecontrollerlist) {
slouken@8772
  1210
            if (gamecontrollerlistprev) {
slouken@8582
  1211
                /* unlink this entry */
slouken@8582
  1212
                gamecontrollerlistprev->next = gamecontrollerlist->next;
slouken@8772
  1213
            } else {
slouken@8582
  1214
                SDL_gamecontrollers = gamecontroller->next;
slouken@8582
  1215
            }
slouken@8582
  1216
slouken@8582
  1217
            break;
slouken@8582
  1218
        }
slouken@8582
  1219
        gamecontrollerlistprev = gamecontrollerlist;
slouken@8582
  1220
        gamecontrollerlist = gamecontrollerlist->next;
slouken@8582
  1221
    }
slouken@8582
  1222
slouken@8582
  1223
    SDL_free(gamecontroller);
slouken@8582
  1224
}
slouken@8582
  1225
slouken@8582
  1226
slouken@8582
  1227
/*
slouken@8582
  1228
 * Quit the controller subsystem
slouken@8582
  1229
 */
slouken@8582
  1230
void
slouken@8582
  1231
SDL_GameControllerQuit(void)
slouken@8582
  1232
{
slouken@8582
  1233
    ControllerMapping_t *pControllerMap;
slouken@8772
  1234
    while (SDL_gamecontrollers) {
slouken@8582
  1235
        SDL_gamecontrollers->ref_count = 1;
slouken@8582
  1236
        SDL_GameControllerClose(SDL_gamecontrollers);
slouken@8582
  1237
    }
slouken@8582
  1238
slouken@8772
  1239
    while (s_pSupportedControllers) {
slouken@8582
  1240
        pControllerMap = s_pSupportedControllers;
slouken@8582
  1241
        s_pSupportedControllers = s_pSupportedControllers->next;
slouken@8772
  1242
        SDL_free(pControllerMap->name);
slouken@8772
  1243
        SDL_free(pControllerMap->mapping);
slouken@8772
  1244
        SDL_free(pControllerMap);
slouken@8582
  1245
    }
slouken@8582
  1246
slouken@8772
  1247
    SDL_DelEventWatch(SDL_GameControllerEventWatcher, NULL);
slouken@8582
  1248
slouken@8582
  1249
}
slouken@8582
  1250
slouken@8582
  1251
/*
slouken@8582
  1252
 * Event filter to transform joystick events into appropriate game controller ones
slouken@8582
  1253
 */
slouken@8582
  1254
int
slouken@8582
  1255
SDL_PrivateGameControllerAxis(SDL_GameController * gamecontroller, SDL_GameControllerAxis axis, Sint16 value)
slouken@8582
  1256
{
slouken@8582
  1257
    int posted;
slouken@8582
  1258
slouken@8582
  1259
    /* translate the event, if desired */
slouken@8582
  1260
    posted = 0;
slouken@8582
  1261
#if !SDL_EVENTS_DISABLED
slouken@8582
  1262
    if (SDL_GetEventState(SDL_CONTROLLERAXISMOTION) == SDL_ENABLE) {
slouken@8582
  1263
        SDL_Event event;
slouken@8582
  1264
        event.type = SDL_CONTROLLERAXISMOTION;
slouken@8582
  1265
        event.caxis.which = gamecontroller->joystick->instance_id;
slouken@8582
  1266
        event.caxis.axis = axis;
slouken@8582
  1267
        event.caxis.value = value;
slouken@8582
  1268
        posted = SDL_PushEvent(&event) == 1;
slouken@8582
  1269
    }
slouken@8582
  1270
#endif /* !SDL_EVENTS_DISABLED */
slouken@8582
  1271
    return (posted);
slouken@8582
  1272
}
slouken@8582
  1273
slouken@8582
  1274
slouken@8582
  1275
/*
slouken@8582
  1276
 * Event filter to transform joystick events into appropriate game controller ones
slouken@8582
  1277
 */
slouken@8582
  1278
int
slouken@8582
  1279
SDL_PrivateGameControllerButton(SDL_GameController * gamecontroller, SDL_GameControllerButton button, Uint8 state)
slouken@8582
  1280
{
slouken@8582
  1281
    int posted;
slouken@8582
  1282
#if !SDL_EVENTS_DISABLED
slouken@8582
  1283
    SDL_Event event;
slouken@8582
  1284
slouken@8772
  1285
    if (button == SDL_CONTROLLER_BUTTON_INVALID)
slouken@8582
  1286
        return (0);
slouken@8582
  1287
slouken@8582
  1288
    switch (state) {
slouken@8582
  1289
    case SDL_PRESSED:
slouken@8582
  1290
        event.type = SDL_CONTROLLERBUTTONDOWN;
slouken@8582
  1291
        break;
slouken@8582
  1292
    case SDL_RELEASED:
slouken@8582
  1293
        event.type = SDL_CONTROLLERBUTTONUP;
slouken@8582
  1294
        break;
slouken@8582
  1295
    default:
slouken@8582
  1296
        /* Invalid state -- bail */
slouken@8582
  1297
        return (0);
slouken@8582
  1298
    }
slouken@8582
  1299
#endif /* !SDL_EVENTS_DISABLED */
slouken@8582
  1300
slouken@8582
  1301
    /* translate the event, if desired */
slouken@8582
  1302
    posted = 0;
slouken@8582
  1303
#if !SDL_EVENTS_DISABLED
slouken@8582
  1304
    if (SDL_GetEventState(event.type) == SDL_ENABLE) {
slouken@8582
  1305
        event.cbutton.which = gamecontroller->joystick->instance_id;
slouken@8582
  1306
        event.cbutton.button = button;
slouken@8582
  1307
        event.cbutton.state = state;
slouken@8582
  1308
        posted = SDL_PushEvent(&event) == 1;
slouken@8582
  1309
    }
slouken@8582
  1310
#endif /* !SDL_EVENTS_DISABLED */
slouken@8582
  1311
    return (posted);
slouken@8582
  1312
}
slouken@8582
  1313
slouken@8582
  1314
/*
slouken@8582
  1315
 * Turn off controller events
slouken@8582
  1316
 */
slouken@8582
  1317
int
slouken@8582
  1318
SDL_GameControllerEventState(int state)
slouken@8582
  1319
{
slouken@8582
  1320
#if SDL_EVENTS_DISABLED
slouken@8582
  1321
    return SDL_IGNORE;
slouken@8582
  1322
#else
slouken@8582
  1323
    const Uint32 event_list[] = {
slouken@8582
  1324
        SDL_CONTROLLERAXISMOTION, SDL_CONTROLLERBUTTONDOWN, SDL_CONTROLLERBUTTONUP,
slouken@8582
  1325
        SDL_CONTROLLERDEVICEADDED, SDL_CONTROLLERDEVICEREMOVED, SDL_CONTROLLERDEVICEREMAPPED,
slouken@8582
  1326
    };
slouken@8582
  1327
    unsigned int i;
slouken@8582
  1328
slouken@8582
  1329
    switch (state) {
slouken@8582
  1330
    case SDL_QUERY:
slouken@8582
  1331
        state = SDL_IGNORE;
slouken@8582
  1332
        for (i = 0; i < SDL_arraysize(event_list); ++i) {
slouken@8582
  1333
            state = SDL_EventState(event_list[i], SDL_QUERY);
slouken@8582
  1334
            if (state == SDL_ENABLE) {
slouken@8582
  1335
                break;
slouken@8582
  1336
            }
slouken@8582
  1337
        }
slouken@8582
  1338
        break;
slouken@8582
  1339
    default:
slouken@8582
  1340
        for (i = 0; i < SDL_arraysize(event_list); ++i) {
slouken@8582
  1341
            SDL_EventState(event_list[i], state);
slouken@8582
  1342
        }
slouken@8582
  1343
        break;
slouken@8582
  1344
    }
slouken@8582
  1345
    return (state);
slouken@8582
  1346
#endif /* SDL_EVENTS_DISABLED */
slouken@8582
  1347
}
slouken@8582
  1348
slouken@8582
  1349
/* vi: set ts=4 sw=4 expandtab: */