| /* |
| Simple DirectMedia Layer |
| Copyright (C) 1997-2014 Sam Lantinga <[email protected]> |
| |
| This software is provided 'as-is', without any express or implied |
| warranty. In no event will the authors be held liable for any damages |
| arising from the use of this software. |
| |
| Permission is granted to anyone to use this software for any purpose, |
| including commercial applications, and to alter it and redistribute it |
| freely, subject to the following restrictions: |
| |
| 1. The origin of this software must not be misrepresented; you must not |
| claim that you wrote the original software. If you use this software |
| in a product, an acknowledgment in the product documentation would be |
| appreciated but is not required. |
| 2. Altered source versions must be plainly marked as such, and must not be |
| misrepresented as being the original software. |
| 3. This notice may not be removed or altered from any source distribution. |
| */ |
| #include "../../SDL_internal.h" |
| |
| #ifdef SDL_JOYSTICK_HAIKU |
| |
| /* This is the Haiku implementation of the SDL joystick API */ |
| |
| #include <os/support/String.h> |
| #include <os/device/Joystick.h> |
| |
| extern "C" |
| { |
| |
| #include "SDL_joystick.h" |
| #include "../SDL_sysjoystick.h" |
| #include "../SDL_joystick_c.h" |
| |
| |
| /* The maximum number of joysticks we'll detect */ |
| #define MAX_JOYSTICKS 16 |
| |
| /* A list of available joysticks */ |
| static char *SDL_joyport[MAX_JOYSTICKS]; |
| static char *SDL_joyname[MAX_JOYSTICKS]; |
| |
| /* The private structure used to keep track of a joystick */ |
| struct joystick_hwdata |
| { |
| BJoystick *stick; |
| uint8 *new_hats; |
| int16 *new_axes; |
| }; |
| |
| static int SDL_SYS_numjoysticks = 0; |
| |
| /* Function to scan the system for joysticks. |
| * This function should set SDL_numjoysticks to the number of available |
| * joysticks. Joystick 0 should be the system default joystick. |
| * It should return 0, or -1 on an unrecoverable fatal error. |
| */ |
| int SDL_SYS_JoystickInit(void) |
| { |
| BJoystick joystick; |
| int i; |
| int32 nports; |
| char name[B_OS_NAME_LENGTH]; |
| |
| /* Search for attached joysticks */ |
| nports = joystick.CountDevices(); |
| SDL_SYS_numjoysticks = 0; |
| SDL_memset(SDL_joyport, 0, (sizeof SDL_joyport)); |
| SDL_memset(SDL_joyname, 0, (sizeof SDL_joyname)); |
| for (i = 0; (SDL_SYS_numjoysticks < MAX_JOYSTICKS) && (i < nports); ++i) |
| { |
| if (joystick.GetDeviceName(i, name) == B_OK) { |
| if (joystick.Open(name) != B_ERROR) { |
| BString stick_name; |
| joystick.GetControllerName(&stick_name); |
| SDL_joyport[SDL_SYS_numjoysticks] = strdup(name); |
| SDL_joyname[SDL_SYS_numjoysticks] = strdup(stick_name.String()); |
| SDL_SYS_numjoysticks++; |
| joystick.Close(); |
| } |
| } |
| } |
| return (SDL_SYS_numjoysticks); |
| } |
| |
| int SDL_SYS_NumJoysticks() |
| { |
| return SDL_SYS_numjoysticks; |
| } |
| |
| void SDL_SYS_JoystickDetect() |
| { |
| } |
| |
| SDL_bool SDL_SYS_JoystickNeedsPolling() |
| { |
| return SDL_FALSE; |
| } |
| |
| /* Function to get the device-dependent name of a joystick */ |
| const char *SDL_SYS_JoystickNameForDeviceIndex(int device_index) |
| { |
| return SDL_joyname[device_index]; |
| } |
| |
| /* Function to perform the mapping from device index to the instance id for this index */ |
| SDL_JoystickID SDL_SYS_GetInstanceIdOfDeviceIndex(int device_index) |
| { |
| return device_index; |
| } |
| |
| /* Function to open a joystick for use. |
| The joystick to open is specified by the index field of the joystick. |
| This should fill the nbuttons and naxes fields of the joystick structure. |
| It returns 0, or -1 if there is an error. |
| */ |
| int SDL_SYS_JoystickOpen(SDL_Joystick * joystick, int device_index) |
| { |
| BJoystick *stick; |
| |
| /* Create the joystick data structure */ |
| joystick->instance_id = device_index; |
| joystick->hwdata = (struct joystick_hwdata *) |
| SDL_malloc(sizeof(*joystick->hwdata)); |
| if (joystick->hwdata == NULL) { |
| return SDL_OutOfMemory(); |
| } |
| SDL_memset(joystick->hwdata, 0, sizeof(*joystick->hwdata)); |
| stick = new BJoystick; |
| joystick->hwdata->stick = stick; |
| |
| /* Open the requested joystick for use */ |
| if (stick->Open(SDL_joyport[device_index]) == B_ERROR) { |
| SDL_SYS_JoystickClose(joystick); |
| return SDL_SetError("Unable to open joystick"); |
| } |
| |
| /* Set the joystick to calibrated mode */ |
| stick->EnableCalibration(); |
| |
| /* Get the number of buttons, hats, and axes on the joystick */ |
| joystick->nbuttons = stick->CountButtons(); |
| joystick->naxes = stick->CountAxes(); |
| joystick->nhats = stick->CountHats(); |
| |
| joystick->hwdata->new_axes = (int16 *) |
| SDL_malloc(joystick->naxes * sizeof(int16)); |
| joystick->hwdata->new_hats = (uint8 *) |
| SDL_malloc(joystick->nhats * sizeof(uint8)); |
| if (!joystick->hwdata->new_hats || !joystick->hwdata->new_axes) { |
| SDL_SYS_JoystickClose(joystick); |
| return SDL_OutOfMemory(); |
| } |
| |
| /* We're done! */ |
| return (0); |
| } |
| |
| /* Function to determine is this joystick is attached to the system right now */ |
| SDL_bool SDL_SYS_JoystickAttached(SDL_Joystick *joystick) |
| { |
| return SDL_TRUE; |
| } |
| |
| /* Function to update the state of a joystick - called as a device poll. |
| * This function shouldn't update the joystick structure directly, |
| * but instead should call SDL_PrivateJoystick*() to deliver events |
| * and update joystick device state. |
| */ |
| void SDL_SYS_JoystickUpdate(SDL_Joystick * joystick) |
| { |
| static const Uint8 hat_map[9] = { |
| SDL_HAT_CENTERED, |
| SDL_HAT_UP, |
| SDL_HAT_RIGHTUP, |
| SDL_HAT_RIGHT, |
| SDL_HAT_RIGHTDOWN, |
| SDL_HAT_DOWN, |
| SDL_HAT_LEFTDOWN, |
| SDL_HAT_LEFT, |
| SDL_HAT_LEFTUP |
| }; |
| const int JITTER = (32768 / 10); /* 10% jitter threshold (ok?) */ |
| |
| BJoystick *stick; |
| int i, change; |
| int16 *axes; |
| uint8 *hats; |
| uint32 buttons; |
| |
| /* Set up data pointers */ |
| stick = joystick->hwdata->stick; |
| axes = joystick->hwdata->new_axes; |
| hats = joystick->hwdata->new_hats; |
| |
| /* Get the new joystick state */ |
| stick->Update(); |
| stick->GetAxisValues(axes); |
| stick->GetHatValues(hats); |
| buttons = stick->ButtonValues(); |
| |
| /* Generate axis motion events */ |
| for (i = 0; i < joystick->naxes; ++i) { |
| change = ((int32) axes[i] - joystick->axes[i]); |
| if ((change > JITTER) || (change < -JITTER)) { |
| SDL_PrivateJoystickAxis(joystick, i, axes[i]); |
| } |
| } |
| |
| /* Generate hat change events */ |
| for (i = 0; i < joystick->nhats; ++i) { |
| if (hats[i] != joystick->hats[i]) { |
| SDL_PrivateJoystickHat(joystick, i, hat_map[hats[i]]); |
| } |
| } |
| |
| /* Generate button events */ |
| for (i = 0; i < joystick->nbuttons; ++i) { |
| if ((buttons & 0x01) != joystick->buttons[i]) { |
| SDL_PrivateJoystickButton(joystick, i, (buttons & 0x01)); |
| } |
| buttons >>= 1; |
| } |
| } |
| |
| /* Function to close a joystick after use */ |
| void SDL_SYS_JoystickClose(SDL_Joystick * joystick) |
| { |
| if (joystick->hwdata) { |
| joystick->hwdata->stick->Close(); |
| delete joystick->hwdata->stick; |
| SDL_free(joystick->hwdata->new_hats); |
| SDL_free(joystick->hwdata->new_axes); |
| SDL_free(joystick->hwdata); |
| joystick->hwdata = NULL; |
| } |
| } |
| |
| /* Function to perform any system-specific joystick related cleanup */ |
| void SDL_SYS_JoystickQuit(void) |
| { |
| int i; |
| |
| for (i = 0; SDL_joyport[i]; ++i) { |
| SDL_free(SDL_joyport[i]); |
| } |
| SDL_joyport[0] = NULL; |
| |
| for (i = 0; SDL_joyname[i]; ++i) { |
| SDL_free(SDL_joyname[i]); |
| } |
| SDL_joyname[0] = NULL; |
| } |
| |
| SDL_JoystickGUID SDL_SYS_JoystickGetDeviceGUID( int device_index ) |
| { |
| SDL_JoystickGUID guid; |
| /* the GUID is just the first 16 chars of the name for now */ |
| const char *name = SDL_SYS_JoystickNameForDeviceIndex( device_index ); |
| SDL_zero( guid ); |
| SDL_memcpy( &guid, name, SDL_min( sizeof(guid), SDL_strlen( name ) ) ); |
| return guid; |
| } |
| |
| SDL_JoystickGUID SDL_SYS_JoystickGetGUID(SDL_Joystick * joystick) |
| { |
| SDL_JoystickGUID guid; |
| /* the GUID is just the first 16 chars of the name for now */ |
| const char *name = joystick->name; |
| SDL_zero( guid ); |
| SDL_memcpy( &guid, name, SDL_min( sizeof(guid), SDL_strlen( name ) ) ); |
| return guid; |
| } |
| |
| }; // extern "C" |
| |
| #endif /* SDL_JOYSTICK_HAIKU */ |
| |
| /* vi: set ts=4 sw=4 expandtab: */ |
