src/haptic/SDL_haptic.c
author Sam Lantinga <slouken@libsdl.org>
Sat, 02 Jan 2016 10:10:34 -0800
changeset 9998 f67cf37e9cd4
parent 9740 55e88e3bc7cc
child 10609 d702ecbd8ba7
permissions -rw-r--r--
Updated copyright to 2016
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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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#include "SDL_syshaptic.h"
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#include "SDL_haptic_c.h"
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#include "../joystick/SDL_joystick_c.h" /* For SDL_PrivateJoystickValid */
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#include "SDL_assert.h"
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SDL_Haptic *SDL_haptics = NULL;
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/*
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 * Initializes the Haptic devices.
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 */
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int
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SDL_HapticInit(void)
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{
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    int status;
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    status = SDL_SYS_HapticInit();
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    if (status >= 0) {
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        status = 0;
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    }
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    return status;
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}
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/*
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 * Checks to see if the haptic device is valid
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 */
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static int
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ValidHaptic(SDL_Haptic * haptic)
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{
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    int valid;
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    SDL_Haptic *hapticlist;
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    valid = 0;
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    if (haptic != NULL) {
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        hapticlist = SDL_haptics;
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        while ( hapticlist )
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        {
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            if (hapticlist == haptic) {
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                valid = 1;
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                break;
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            }
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            hapticlist = hapticlist->next;
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        }
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    }
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    /* Create the error here. */
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    if (valid == 0) {
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        SDL_SetError("Haptic: Invalid haptic device identifier");
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    }
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    return valid;
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}
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/*
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 * Returns the number of available devices.
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 */
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int
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SDL_NumHaptics(void)
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{
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    return SDL_SYS_NumHaptics();
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}
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/*
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 * Gets the name of a Haptic device by index.
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 */
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const char *
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SDL_HapticName(int device_index)
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{
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    if ((device_index < 0) || (device_index >= SDL_NumHaptics())) {
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        SDL_SetError("Haptic: There are %d haptic devices available",
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                     SDL_NumHaptics());
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        return NULL;
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    }
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    return SDL_SYS_HapticName(device_index);
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}
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/*
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 * Opens a Haptic device.
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 */
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SDL_Haptic *
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SDL_HapticOpen(int device_index)
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{
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    SDL_Haptic *haptic;
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    SDL_Haptic *hapticlist;
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    if ((device_index < 0) || (device_index >= SDL_NumHaptics())) {
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        SDL_SetError("Haptic: There are %d haptic devices available",
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                     SDL_NumHaptics());
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        return NULL;
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    }
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    hapticlist = SDL_haptics;
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    /* If the haptic is already open, return it
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    * TODO: Should we create haptic instance IDs like the Joystick API?
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    */
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    while ( hapticlist )
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    {
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        if (device_index == hapticlist->index) {
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            haptic = hapticlist;
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            ++haptic->ref_count;
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            return haptic;
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        }
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        hapticlist = hapticlist->next;
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    }
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    /* Create the haptic device */
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    haptic = (SDL_Haptic *) SDL_malloc((sizeof *haptic));
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    if (haptic == NULL) {
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        SDL_OutOfMemory();
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        return NULL;
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    }
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    /* Initialize the haptic device */
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    SDL_memset(haptic, 0, (sizeof *haptic));
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    haptic->rumble_id = -1;
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    haptic->index = device_index;
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    if (SDL_SYS_HapticOpen(haptic) < 0) {
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        SDL_free(haptic);
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        return NULL;
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    }
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    /* Add haptic to list */
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    ++haptic->ref_count;
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    /* Link the haptic in the list */
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    haptic->next = SDL_haptics;
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    SDL_haptics = haptic;
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    /* Disable autocenter and set gain to max. */
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    if (haptic->supported & SDL_HAPTIC_GAIN)
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        SDL_HapticSetGain(haptic, 100);
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    if (haptic->supported & SDL_HAPTIC_AUTOCENTER)
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        SDL_HapticSetAutocenter(haptic, 0);
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    return haptic;
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}
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/*
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 * Returns 1 if the device has been opened.
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 */
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int
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SDL_HapticOpened(int device_index)
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{
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    int opened;
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    SDL_Haptic *hapticlist;
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    /* Make sure it's valid. */
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    if ((device_index < 0) || (device_index >= SDL_NumHaptics())) {
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        SDL_SetError("Haptic: There are %d haptic devices available",
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                     SDL_NumHaptics());
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        return 0;
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    }
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    opened = 0;
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    hapticlist = SDL_haptics;
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    /* TODO Should this use an instance ID? */
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    while ( hapticlist )
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    {
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        if (hapticlist->index == (Uint8) device_index) {
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            opened = 1;
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            break;
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        }
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        hapticlist = hapticlist->next;
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    }
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    return opened;
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}
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/*
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 * Returns the index to a haptic device.
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 */
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int
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SDL_HapticIndex(SDL_Haptic * haptic)
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{
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    if (!ValidHaptic(haptic)) {
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        return -1;
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    }
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    return haptic->index;
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}
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/*
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 * Returns SDL_TRUE if mouse is haptic, SDL_FALSE if it isn't.
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 */
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int
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SDL_MouseIsHaptic(void)
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{
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    if (SDL_SYS_HapticMouse() < 0)
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        return SDL_FALSE;
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    return SDL_TRUE;
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}
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/*
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 * Returns the haptic device if mouse is haptic or NULL elsewise.
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 */
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SDL_Haptic *
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SDL_HapticOpenFromMouse(void)
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{
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    int device_index;
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    device_index = SDL_SYS_HapticMouse();
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    if (device_index < 0) {
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        SDL_SetError("Haptic: Mouse isn't a haptic device.");
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        return NULL;
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    }
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    return SDL_HapticOpen(device_index);
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}
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/*
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 * Returns SDL_TRUE if joystick has haptic features.
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 */
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int
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SDL_JoystickIsHaptic(SDL_Joystick * joystick)
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{
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    int ret;
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    /* Must be a valid joystick */
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    if (!SDL_PrivateJoystickValid(joystick)) {
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        return -1;
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    }
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    ret = SDL_SYS_JoystickIsHaptic(joystick);
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    if (ret > 0)
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        return SDL_TRUE;
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    else if (ret == 0)
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        return SDL_FALSE;
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    else
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        return -1;
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}
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/*
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 * Opens a haptic device from a joystick.
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 */
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SDL_Haptic *
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SDL_HapticOpenFromJoystick(SDL_Joystick * joystick)
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{
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    SDL_Haptic *haptic;
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    SDL_Haptic *hapticlist;
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    /* Make sure there is room. */
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    if (SDL_NumHaptics() <= 0) {
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        SDL_SetError("Haptic: There are %d haptic devices available",
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                     SDL_NumHaptics());
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        return NULL;
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    }
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    /* Must be a valid joystick */
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    if (!SDL_PrivateJoystickValid(joystick)) {
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        SDL_SetError("Haptic: Joystick isn't valid.");
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        return NULL;
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    }
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    /* Joystick must be haptic */
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    if (SDL_SYS_JoystickIsHaptic(joystick) <= 0) {
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        SDL_SetError("Haptic: Joystick isn't a haptic device.");
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        return NULL;
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    }
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    hapticlist = SDL_haptics;
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    /* Check to see if joystick's haptic is already open */
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    while ( hapticlist )
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    {
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        if (SDL_SYS_JoystickSameHaptic(hapticlist, joystick)) {
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            haptic = hapticlist;
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            ++haptic->ref_count;
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            return haptic;
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        }
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        hapticlist = hapticlist->next;
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    }
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    /* Create the haptic device */
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    haptic = (SDL_Haptic *) SDL_malloc((sizeof *haptic));
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    if (haptic == NULL) {
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        SDL_OutOfMemory();
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        return NULL;
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    }
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    /* Initialize the haptic device */
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    SDL_memset(haptic, 0, sizeof(SDL_Haptic));
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    haptic->rumble_id = -1;
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    if (SDL_SYS_HapticOpenFromJoystick(haptic, joystick) < 0) {
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        SDL_free(haptic);
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        return NULL;
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    }
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    /* Add haptic to list */
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    ++haptic->ref_count;
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    /* Link the haptic in the list */
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    haptic->next = SDL_haptics;
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    SDL_haptics = haptic;
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    return haptic;
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}
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/*
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 * Closes a SDL_Haptic device.
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 */
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void
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SDL_HapticClose(SDL_Haptic * haptic)
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{
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    int i;
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    SDL_Haptic *hapticlist;
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    SDL_Haptic *hapticlistprev;
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    /* Must be valid */
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    if (!ValidHaptic(haptic)) {
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        return;
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    }
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   345
    /* Check if it's still in use */
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    if (--haptic->ref_count > 0) {
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        return;
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   348
    }
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   349
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   350
    /* Close it, properly removing effects if needed */
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    for (i = 0; i < haptic->neffects; i++) {
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        if (haptic->effects[i].hweffect != NULL) {
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            SDL_HapticDestroyEffect(haptic, i);
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   354
        }
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   355
    }
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   356
    SDL_SYS_HapticClose(haptic);
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   358
    /* Remove from the list */
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    hapticlist = SDL_haptics;
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    hapticlistprev = NULL;
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    while ( hapticlist )
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   362
    {
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        if (haptic == hapticlist)
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   364
        {
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            if ( hapticlistprev )
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   366
            {
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   367
                /* unlink this entry */
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   368
                hapticlistprev->next = hapticlist->next;
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   369
            }
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   370
            else
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   371
            {
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                SDL_haptics = haptic->next;
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   373
            }
urkle@8170
   374
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   375
            break;
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   376
        }
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   377
        hapticlistprev = hapticlist;
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        hapticlist = hapticlist->next;
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   379
    }
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slouken@2713
   381
    /* Free */
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    SDL_free(haptic);
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}
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   384
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   385
/*
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 * Cleans up after the subsystem.
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 */
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   388
void
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   389
SDL_HapticQuit(void)
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   390
{
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   391
    SDL_SYS_HapticQuit();
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   392
    SDL_assert(SDL_haptics == NULL);
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   393
    SDL_haptics = NULL;
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   394
}
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   395
slouken@2713
   396
/*
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   397
 * Returns the number of effects a haptic device has.
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   398
 */
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   399
int
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   400
SDL_HapticNumEffects(SDL_Haptic * haptic)
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   401
{
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   402
    if (!ValidHaptic(haptic)) {
slouken@2713
   403
        return -1;
slouken@2713
   404
    }
slouken@2713
   405
slouken@2713
   406
    return haptic->neffects;
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   407
}
slouken@2713
   408
slouken@2713
   409
slouken@2713
   410
/*
slouken@2713
   411
 * Returns the number of effects a haptic device can play.
slouken@2713
   412
 */
slouken@2713
   413
int
slouken@2713
   414
SDL_HapticNumEffectsPlaying(SDL_Haptic * haptic)
slouken@2713
   415
{
slouken@2713
   416
    if (!ValidHaptic(haptic)) {
slouken@2713
   417
        return -1;
slouken@2713
   418
    }
slouken@2713
   419
slouken@2713
   420
    return haptic->nplaying;
slouken@2713
   421
}
slouken@2713
   422
slouken@2713
   423
slouken@2713
   424
/*
slouken@2713
   425
 * Returns supported effects by the device.
slouken@2713
   426
 */
slouken@2713
   427
unsigned int
slouken@2713
   428
SDL_HapticQuery(SDL_Haptic * haptic)
slouken@2713
   429
{
slouken@2713
   430
    if (!ValidHaptic(haptic)) {
philipp@7131
   431
        return 0; /* same as if no effects were supported */
slouken@2713
   432
    }
slouken@2713
   433
slouken@2713
   434
    return haptic->supported;
slouken@2713
   435
}
slouken@2713
   436
slouken@2713
   437
slouken@2713
   438
/*
slouken@2713
   439
 * Returns the number of axis on the device.
slouken@2713
   440
 */
slouken@2713
   441
int
slouken@2713
   442
SDL_HapticNumAxes(SDL_Haptic * haptic)
slouken@2713
   443
{
slouken@2713
   444
    if (!ValidHaptic(haptic)) {
slouken@2713
   445
        return -1;
slouken@2713
   446
    }
slouken@2713
   447
slouken@2713
   448
    return haptic->naxes;
slouken@2713
   449
}
slouken@2713
   450
slouken@2713
   451
/*
slouken@2713
   452
 * Checks to see if the device can support the effect.
slouken@2713
   453
 */
slouken@2713
   454
int
slouken@2713
   455
SDL_HapticEffectSupported(SDL_Haptic * haptic, SDL_HapticEffect * effect)
slouken@2713
   456
{
slouken@2713
   457
    if (!ValidHaptic(haptic)) {
slouken@2713
   458
        return -1;
slouken@2713
   459
    }
slouken@2713
   460
slouken@2713
   461
    if ((haptic->supported & effect->type) != 0)
slouken@2713
   462
        return SDL_TRUE;
slouken@2713
   463
    return SDL_FALSE;
slouken@2713
   464
}
slouken@2713
   465
slouken@2713
   466
/*
slouken@2713
   467
 * Creates a new haptic effect.
slouken@2713
   468
 */
slouken@2713
   469
int
slouken@2713
   470
SDL_HapticNewEffect(SDL_Haptic * haptic, SDL_HapticEffect * effect)
slouken@2713
   471
{
slouken@2713
   472
    int i;
slouken@2713
   473
slouken@2713
   474
    /* Check for device validity. */
slouken@2713
   475
    if (!ValidHaptic(haptic)) {
slouken@2713
   476
        return -1;
slouken@2713
   477
    }
slouken@2713
   478
slouken@2713
   479
    /* Check to see if effect is supported */
slouken@2713
   480
    if (SDL_HapticEffectSupported(haptic, effect) == SDL_FALSE) {
icculus@7037
   481
        return SDL_SetError("Haptic: Effect not supported by haptic device.");
slouken@2713
   482
    }
slouken@2713
   483
slouken@2713
   484
    /* See if there's a free slot */
slouken@2713
   485
    for (i = 0; i < haptic->neffects; i++) {
slouken@2713
   486
        if (haptic->effects[i].hweffect == NULL) {
slouken@2713
   487
slouken@2713
   488
            /* Now let the backend create the real effect */
slouken@2713
   489
            if (SDL_SYS_HapticNewEffect(haptic, &haptic->effects[i], effect)
slouken@2713
   490
                != 0) {
slouken@2713
   491
                return -1;      /* Backend failed to create effect */
slouken@2713
   492
            }
slouken@2713
   493
slouken@2713
   494
            SDL_memcpy(&haptic->effects[i].effect, effect,
slouken@2713
   495
                       sizeof(SDL_HapticEffect));
slouken@2713
   496
            return i;
slouken@2713
   497
        }
slouken@2713
   498
    }
slouken@2713
   499
icculus@7037
   500
    return SDL_SetError("Haptic: Device has no free space left.");
slouken@2713
   501
}
slouken@2713
   502
slouken@2713
   503
/*
slouken@2713
   504
 * Checks to see if an effect is valid.
slouken@2713
   505
 */
slouken@2713
   506
static int
slouken@2713
   507
ValidEffect(SDL_Haptic * haptic, int effect)
slouken@2713
   508
{
slouken@2713
   509
    if ((effect < 0) || (effect >= haptic->neffects)) {
slouken@2713
   510
        SDL_SetError("Haptic: Invalid effect identifier.");
slouken@2713
   511
        return 0;
slouken@2713
   512
    }
slouken@2713
   513
    return 1;
slouken@2713
   514
}
slouken@2713
   515
slouken@2713
   516
/*
slouken@2713
   517
 * Updates an effect.
slouken@2713
   518
 */
slouken@2713
   519
int
slouken@2713
   520
SDL_HapticUpdateEffect(SDL_Haptic * haptic, int effect,
slouken@2713
   521
                       SDL_HapticEffect * data)
slouken@2713
   522
{
slouken@2713
   523
    if (!ValidHaptic(haptic) || !ValidEffect(haptic, effect)) {
slouken@2713
   524
        return -1;
slouken@2713
   525
    }
slouken@2713
   526
slouken@2713
   527
    /* Can't change type dynamically. */
slouken@2713
   528
    if (data->type != haptic->effects[effect].effect.type) {
icculus@7037
   529
        return SDL_SetError("Haptic: Updating effect type is illegal.");
slouken@2713
   530
    }
slouken@2713
   531
slouken@2713
   532
    /* Updates the effect */
slouken@2713
   533
    if (SDL_SYS_HapticUpdateEffect(haptic, &haptic->effects[effect], data) <
slouken@2713
   534
        0) {
slouken@2713
   535
        return -1;
slouken@2713
   536
    }
slouken@2713
   537
slouken@2713
   538
    SDL_memcpy(&haptic->effects[effect].effect, data,
slouken@2713
   539
               sizeof(SDL_HapticEffect));
icculus@7536
   540
    return 0;
slouken@2713
   541
}
slouken@2713
   542
slouken@2713
   543
slouken@2713
   544
/*
slouken@2713
   545
 * Runs the haptic effect on the device.
slouken@2713
   546
 */
slouken@2713
   547
int
slouken@2713
   548
SDL_HapticRunEffect(SDL_Haptic * haptic, int effect, Uint32 iterations)
slouken@2713
   549
{
slouken@2713
   550
    if (!ValidHaptic(haptic) || !ValidEffect(haptic, effect)) {
slouken@2713
   551
        return -1;
slouken@2713
   552
    }
slouken@2713
   553
slouken@2713
   554
    /* Run the effect */
slouken@2713
   555
    if (SDL_SYS_HapticRunEffect(haptic, &haptic->effects[effect], iterations)
slouken@2713
   556
        < 0) {
slouken@2713
   557
        return -1;
slouken@2713
   558
    }
slouken@2713
   559
slouken@2713
   560
    return 0;
slouken@2713
   561
}
slouken@2713
   562
slouken@2713
   563
/*
slouken@2713
   564
 * Stops the haptic effect on the device.
slouken@2713
   565
 */
slouken@2713
   566
int
slouken@2713
   567
SDL_HapticStopEffect(SDL_Haptic * haptic, int effect)
slouken@2713
   568
{
slouken@2713
   569
    if (!ValidHaptic(haptic) || !ValidEffect(haptic, effect)) {
slouken@2713
   570
        return -1;
slouken@2713
   571
    }
slouken@2713
   572
slouken@2713
   573
    /* Stop the effect */
slouken@2713
   574
    if (SDL_SYS_HapticStopEffect(haptic, &haptic->effects[effect]) < 0) {
slouken@2713
   575
        return -1;
slouken@2713
   576
    }
slouken@2713
   577
slouken@2713
   578
    return 0;
slouken@2713
   579
}
slouken@2713
   580
slouken@2713
   581
/*
slouken@2713
   582
 * Gets rid of a haptic effect.
slouken@2713
   583
 */
slouken@2713
   584
void
slouken@2713
   585
SDL_HapticDestroyEffect(SDL_Haptic * haptic, int effect)
slouken@2713
   586
{
slouken@2713
   587
    if (!ValidHaptic(haptic) || !ValidEffect(haptic, effect)) {
slouken@2713
   588
        return;
slouken@2713
   589
    }
slouken@2713
   590
slouken@2713
   591
    /* Not allocated */
slouken@2713
   592
    if (haptic->effects[effect].hweffect == NULL) {
slouken@2713
   593
        return;
slouken@2713
   594
    }
slouken@2713
   595
slouken@2713
   596
    SDL_SYS_HapticDestroyEffect(haptic, &haptic->effects[effect]);
slouken@2713
   597
}
slouken@2713
   598
slouken@2713
   599
/*
slouken@2713
   600
 * Gets the status of a haptic effect.
slouken@2713
   601
 */
slouken@2713
   602
int
slouken@2713
   603
SDL_HapticGetEffectStatus(SDL_Haptic * haptic, int effect)
slouken@2713
   604
{
slouken@2713
   605
    if (!ValidHaptic(haptic) || !ValidEffect(haptic, effect)) {
slouken@2713
   606
        return -1;
slouken@2713
   607
    }
slouken@2713
   608
slouken@2713
   609
    if ((haptic->supported & SDL_HAPTIC_STATUS) == 0) {
icculus@7037
   610
        return SDL_SetError("Haptic: Device does not support status queries.");
slouken@2713
   611
    }
slouken@2713
   612
slouken@2713
   613
    return SDL_SYS_HapticGetEffectStatus(haptic, &haptic->effects[effect]);
slouken@2713
   614
}
slouken@2713
   615
slouken@2713
   616
/*
slouken@2713
   617
 * Sets the global gain of the device.
slouken@2713
   618
 */
slouken@2713
   619
int
slouken@2713
   620
SDL_HapticSetGain(SDL_Haptic * haptic, int gain)
slouken@2713
   621
{
slouken@2713
   622
    const char *env;
slouken@2713
   623
    int real_gain, max_gain;
slouken@2713
   624
slouken@2713
   625
    if (!ValidHaptic(haptic)) {
slouken@2713
   626
        return -1;
slouken@2713
   627
    }
slouken@2713
   628
slouken@2713
   629
    if ((haptic->supported & SDL_HAPTIC_GAIN) == 0) {
icculus@7037
   630
        return SDL_SetError("Haptic: Device does not support setting gain.");
slouken@2713
   631
    }
slouken@2713
   632
slouken@2713
   633
    if ((gain < 0) || (gain > 100)) {
icculus@7037
   634
        return SDL_SetError("Haptic: Gain must be between 0 and 100.");
slouken@2713
   635
    }
slouken@2713
   636
slouken@2713
   637
    /* We use the envvar to get the maximum gain. */
slouken@2713
   638
    env = SDL_getenv("SDL_HAPTIC_GAIN_MAX");
slouken@2713
   639
    if (env != NULL) {
slouken@2713
   640
        max_gain = SDL_atoi(env);
slouken@2713
   641
slouken@2713
   642
        /* Check for sanity. */
slouken@2713
   643
        if (max_gain < 0)
slouken@2713
   644
            max_gain = 0;
slouken@2713
   645
        else if (max_gain > 100)
slouken@2713
   646
            max_gain = 100;
slouken@2713
   647
slouken@2713
   648
        /* We'll scale it linearly with SDL_HAPTIC_GAIN_MAX */
slouken@2713
   649
        real_gain = (gain * max_gain) / 100;
slouken@2713
   650
    } else {
slouken@2713
   651
        real_gain = gain;
slouken@2713
   652
    }
slouken@2713
   653
slouken@2713
   654
    if (SDL_SYS_HapticSetGain(haptic, real_gain) < 0) {
slouken@2713
   655
        return -1;
slouken@2713
   656
    }
slouken@2713
   657
slouken@2713
   658
    return 0;
slouken@2713
   659
}
slouken@2713
   660
slouken@2713
   661
/*
slouken@2713
   662
 * Makes the device autocenter, 0 disables.
slouken@2713
   663
 */
slouken@2713
   664
int
slouken@2713
   665
SDL_HapticSetAutocenter(SDL_Haptic * haptic, int autocenter)
slouken@2713
   666
{
slouken@2713
   667
    if (!ValidHaptic(haptic)) {
slouken@2713
   668
        return -1;
slouken@2713
   669
    }
slouken@2713
   670
slouken@2713
   671
    if ((haptic->supported & SDL_HAPTIC_AUTOCENTER) == 0) {
icculus@7037
   672
        return SDL_SetError("Haptic: Device does not support setting autocenter.");
slouken@2713
   673
    }
slouken@2713
   674
slouken@2713
   675
    if ((autocenter < 0) || (autocenter > 100)) {
icculus@7037
   676
        return SDL_SetError("Haptic: Autocenter must be between 0 and 100.");
slouken@2713
   677
    }
slouken@2713
   678
slouken@2713
   679
    if (SDL_SYS_HapticSetAutocenter(haptic, autocenter) < 0) {
slouken@2713
   680
        return -1;
slouken@2713
   681
    }
slouken@2713
   682
slouken@2713
   683
    return 0;
slouken@2713
   684
}
slouken@2713
   685
slouken@2713
   686
/*
slouken@2713
   687
 * Pauses the haptic device.
slouken@2713
   688
 */
slouken@2713
   689
int
slouken@2713
   690
SDL_HapticPause(SDL_Haptic * haptic)
slouken@2713
   691
{
slouken@2713
   692
    if (!ValidHaptic(haptic)) {
slouken@2713
   693
        return -1;
slouken@2713
   694
    }
slouken@2713
   695
slouken@2713
   696
    if ((haptic->supported & SDL_HAPTIC_PAUSE) == 0) {
icculus@7037
   697
        return SDL_SetError("Haptic: Device does not support setting pausing.");
slouken@2713
   698
    }
slouken@2713
   699
slouken@2713
   700
    return SDL_SYS_HapticPause(haptic);
slouken@2713
   701
}
slouken@2713
   702
slouken@2713
   703
/*
slouken@2713
   704
 * Unpauses the haptic device.
slouken@2713
   705
 */
slouken@2713
   706
int
slouken@2713
   707
SDL_HapticUnpause(SDL_Haptic * haptic)
slouken@2713
   708
{
slouken@2713
   709
    if (!ValidHaptic(haptic)) {
slouken@2713
   710
        return -1;
slouken@2713
   711
    }
slouken@2713
   712
slouken@2713
   713
    if ((haptic->supported & SDL_HAPTIC_PAUSE) == 0) {
slouken@2713
   714
        return 0;               /* Not going to be paused, so we pretend it's unpaused. */
slouken@2713
   715
    }
slouken@2713
   716
slouken@2713
   717
    return SDL_SYS_HapticUnpause(haptic);
slouken@2713
   718
}
slouken@2713
   719
slouken@2713
   720
/*
slouken@2713
   721
 * Stops all the currently playing effects.
slouken@2713
   722
 */
slouken@2713
   723
int
slouken@2713
   724
SDL_HapticStopAll(SDL_Haptic * haptic)
slouken@2713
   725
{
slouken@2713
   726
    if (!ValidHaptic(haptic)) {
slouken@2713
   727
        return -1;
slouken@2713
   728
    }
slouken@2713
   729
slouken@2713
   730
    return SDL_SYS_HapticStopAll(haptic);
slouken@2713
   731
}
slouken@5360
   732
slouken@5360
   733
/*
slouken@5360
   734
 * Checks to see if rumble is supported.
slouken@5360
   735
 */
slouken@5360
   736
int
slouken@5360
   737
SDL_HapticRumbleSupported(SDL_Haptic * haptic)
slouken@5360
   738
{
slouken@5360
   739
    if (!ValidHaptic(haptic)) {
slouken@5360
   740
        return -1;
slouken@5360
   741
    }
slouken@5360
   742
icculus@7621
   743
    /* Most things can use SINE, but XInput only has LEFTRIGHT. */
icculus@7621
   744
    return ((haptic->supported & (SDL_HAPTIC_SINE|SDL_HAPTIC_LEFTRIGHT)) != 0);
slouken@5360
   745
}
slouken@5360
   746
slouken@5360
   747
/*
slouken@5360
   748
 * Initializes the haptic device for simple rumble playback.
slouken@5360
   749
 */
slouken@5360
   750
int
slouken@5360
   751
SDL_HapticRumbleInit(SDL_Haptic * haptic)
slouken@5360
   752
{
icculus@7621
   753
    SDL_HapticEffect *efx = &haptic->rumble_effect;
icculus@7621
   754
slouken@5360
   755
    if (!ValidHaptic(haptic)) {
slouken@5360
   756
        return -1;
slouken@5360
   757
    }
slouken@5360
   758
slouken@5360
   759
    /* Already allocated. */
slouken@5360
   760
    if (haptic->rumble_id >= 0) {
slouken@5360
   761
        return 0;
slouken@5360
   762
    }
slouken@5360
   763
icculus@7621
   764
    SDL_zerop(efx);
icculus@7621
   765
    if (haptic->supported & SDL_HAPTIC_SINE) {
icculus@7621
   766
        efx->type = SDL_HAPTIC_SINE;
icculus@7621
   767
        efx->periodic.period = 1000;
icculus@7621
   768
        efx->periodic.magnitude = 0x4000;
icculus@7621
   769
        efx->periodic.length = 5000;
icculus@7621
   770
        efx->periodic.attack_length = 0;
icculus@7621
   771
        efx->periodic.fade_length = 0;
icculus@7621
   772
    } else if (haptic->supported & SDL_HAPTIC_LEFTRIGHT) {  /* XInput? */
icculus@7621
   773
        efx->type = SDL_HAPTIC_LEFTRIGHT;
icculus@7621
   774
        efx->leftright.length = 5000;
icculus@7621
   775
        efx->leftright.large_magnitude = 0x4000;
icculus@7621
   776
        efx->leftright.small_magnitude = 0x4000;
icculus@7621
   777
    } else {
icculus@7621
   778
        return SDL_SetError("Device doesn't support rumble");
icculus@7621
   779
    }
icculus@7621
   780
slouken@5360
   781
    haptic->rumble_id = SDL_HapticNewEffect(haptic, &haptic->rumble_effect);
slouken@5360
   782
    if (haptic->rumble_id >= 0) {
slouken@5360
   783
        return 0;
slouken@5360
   784
    }
slouken@5360
   785
    return -1;
slouken@5360
   786
}
slouken@5360
   787
slouken@5360
   788
/*
slouken@5360
   789
 * Runs simple rumble on a haptic device
slouken@5360
   790
 */
slouken@5360
   791
int
slouken@5360
   792
SDL_HapticRumblePlay(SDL_Haptic * haptic, float strength, Uint32 length)
slouken@5360
   793
{
icculus@7621
   794
    SDL_HapticEffect *efx;
icculus@7621
   795
    Sint16 magnitude;
slouken@5360
   796
slouken@5360
   797
    if (!ValidHaptic(haptic)) {
slouken@5360
   798
        return -1;
slouken@5360
   799
    }
slouken@5360
   800
slouken@5360
   801
    if (haptic->rumble_id < 0) {
icculus@7037
   802
        return SDL_SetError("Haptic: Rumble effect not initialized on haptic device");
slouken@5360
   803
    }
slouken@5360
   804
slouken@5360
   805
    /* Clamp strength. */
slouken@5360
   806
    if (strength > 1.0f) {
slouken@5360
   807
        strength = 1.0f;
icculus@7621
   808
    } else if (strength < 0.0f) {
slouken@5360
   809
        strength = 0.0f;
slouken@5360
   810
    }
icculus@7621
   811
    magnitude = (Sint16)(32767.0f*strength);
slouken@5360
   812
icculus@7621
   813
    efx = &haptic->rumble_effect;
icculus@7621
   814
    if (efx->type == SDL_HAPTIC_SINE) {
icculus@7621
   815
        efx->periodic.magnitude = magnitude;
icculus@7621
   816
        efx->periodic.length = length;
icculus@7621
   817
    } else if (efx->type == SDL_HAPTIC_LEFTRIGHT) {
icculus@7621
   818
        efx->leftright.small_magnitude = efx->leftright.large_magnitude = magnitude;
icculus@7621
   819
        efx->leftright.length = length;
icculus@7621
   820
    } else {
icculus@7621
   821
        SDL_assert(0 && "This should have been caught elsewhere");
icculus@7621
   822
    }
icculus@7621
   823
philipp@7531
   824
    if (SDL_HapticUpdateEffect(haptic, haptic->rumble_id, &haptic->rumble_effect) < 0) {
philipp@7531
   825
        return -1;
slouken@7524
   826
    }
slouken@5360
   827
slouken@5360
   828
    return SDL_HapticRunEffect(haptic, haptic->rumble_id, 1);
slouken@5360
   829
}
slouken@5360
   830
slouken@5360
   831
/*
slouken@5360
   832
 * Stops the simple rumble on a haptic device.
slouken@5360
   833
 */
slouken@5360
   834
int
slouken@5360
   835
SDL_HapticRumbleStop(SDL_Haptic * haptic)
slouken@5360
   836
{
slouken@5360
   837
    if (!ValidHaptic(haptic)) {
slouken@5360
   838
        return -1;
slouken@5360
   839
    }
slouken@5360
   840
slouken@5360
   841
    if (haptic->rumble_id < 0) {
icculus@7037
   842
        return SDL_SetError("Haptic: Rumble effect not initialized on haptic device");
slouken@5360
   843
    }
slouken@5360
   844
slouken@5360
   845
    return SDL_HapticStopEffect(haptic, haptic->rumble_id);
slouken@5360
   846
}
slouken@5360
   847
slouken@9740
   848
/* vi: set ts=4 sw=4 expandtab: */