diff options
Diffstat (limited to 'macosx/plugins/DFInput/SDL/src/joystick/SDL_joystick.c')
| -rw-r--r-- | macosx/plugins/DFInput/SDL/src/joystick/SDL_joystick.c | 503 |
1 files changed, 503 insertions, 0 deletions
diff --git a/macosx/plugins/DFInput/SDL/src/joystick/SDL_joystick.c b/macosx/plugins/DFInput/SDL/src/joystick/SDL_joystick.c new file mode 100644 index 0000000..189b811 --- /dev/null +++ b/macosx/plugins/DFInput/SDL/src/joystick/SDL_joystick.c @@ -0,0 +1,503 @@ +/* + SDL - Simple DirectMedia Layer + Copyright (C) 1997-2010 Sam Lantinga + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, write to the Free Software + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + + Sam Lantinga + slouken@libsdl.org +*/ +#include "SDL_config.h" + +/* This is the joystick API for Simple DirectMedia Layer */ +#include "SDL.h" +#include "SDL_sysjoystick.h" +#include "SDL_joystick_c.h" + +/* This is used for Quake III Arena */ +#define SDL_Lock_EventThread() +#define SDL_Unlock_EventThread() + +Uint8 SDL_numjoysticks = 0; +SDL_Joystick **SDL_joysticks = NULL; +static SDL_Joystick *default_joystick = NULL; + +int +SDL_JoystickInit(void) +{ + int arraylen; + int status; + + SDL_numjoysticks = 0; + status = SDL_SYS_JoystickInit(); + if (status >= 0) { + arraylen = (status + 1) * sizeof(*SDL_joysticks); + SDL_joysticks = (SDL_Joystick **) SDL_malloc(arraylen); + if (SDL_joysticks == NULL) { + SDL_numjoysticks = 0; + } else { + SDL_memset(SDL_joysticks, 0, arraylen); + SDL_numjoysticks = status; + } + status = 0; + } + default_joystick = NULL; + return (status); +} + +/* + * Count the number of joysticks attached to the system + */ +int +SDL_NumJoysticks(void) +{ + return SDL_numjoysticks; +} + +/* + * Get the implementation dependent name of a joystick + */ +const char * +SDL_JoystickName(int device_index) +{ + if ((device_index < 0) || (device_index >= SDL_numjoysticks)) { + SDL_SetError("There are %d joysticks available", SDL_numjoysticks); + return (NULL); + } + return (SDL_SYS_JoystickName(device_index)); +} + +/* + * Open a joystick for use - the index passed as an argument refers to + * the N'th joystick on the system. This index is the value which will + * identify this joystick in future joystick events. + * + * This function returns a joystick identifier, or NULL if an error occurred. + */ +SDL_Joystick * +SDL_JoystickOpen(int device_index) +{ + int i; + SDL_Joystick *joystick; + + if ((device_index < 0) || (device_index >= SDL_numjoysticks)) { + SDL_SetError("There are %d joysticks available", SDL_numjoysticks); + return (NULL); + } + + /* If the joystick is already open, return it */ + for (i = 0; SDL_joysticks[i]; ++i) { + if (device_index == SDL_joysticks[i]->index) { + joystick = SDL_joysticks[i]; + ++joystick->ref_count; + return (joystick); + } + } + + /* Create and initialize the joystick */ + joystick = (SDL_Joystick *) SDL_malloc((sizeof *joystick)); + if (joystick == NULL) { + SDL_OutOfMemory(); + return NULL; + } + + SDL_memset(joystick, 0, (sizeof *joystick)); + joystick->index = device_index; + if (SDL_SYS_JoystickOpen(joystick) < 0) { + SDL_free(joystick); + return NULL; + } + if (joystick->naxes > 0) { + joystick->axes = (Sint16 *) SDL_malloc + (joystick->naxes * sizeof(Sint16)); + } + if (joystick->nhats > 0) { + joystick->hats = (Uint8 *) SDL_malloc + (joystick->nhats * sizeof(Uint8)); + } + if (joystick->nballs > 0) { + joystick->balls = (struct balldelta *) SDL_malloc + (joystick->nballs * sizeof(*joystick->balls)); + } + if (joystick->nbuttons > 0) { + joystick->buttons = (Uint8 *) SDL_malloc + (joystick->nbuttons * sizeof(Uint8)); + } + if (((joystick->naxes > 0) && !joystick->axes) + || ((joystick->nhats > 0) && !joystick->hats) + || ((joystick->nballs > 0) && !joystick->balls) + || ((joystick->nbuttons > 0) && !joystick->buttons)) { + SDL_OutOfMemory(); + SDL_JoystickClose(joystick); + return NULL; + } + if (joystick->axes) { + SDL_memset(joystick->axes, 0, joystick->naxes * sizeof(Sint16)); + } + if (joystick->hats) { + SDL_memset(joystick->hats, 0, joystick->nhats * sizeof(Uint8)); + } + if (joystick->balls) { + SDL_memset(joystick->balls, 0, + joystick->nballs * sizeof(*joystick->balls)); + } + if (joystick->buttons) { + SDL_memset(joystick->buttons, 0, joystick->nbuttons * sizeof(Uint8)); + } + + /* Add joystick to list */ + ++joystick->ref_count; + SDL_Lock_EventThread(); + for (i = 0; SDL_joysticks[i]; ++i) + /* Skip to next joystick */ ; + SDL_joysticks[i] = joystick; + SDL_Unlock_EventThread(); + + return (joystick); +} + +/* + * Returns 1 if the joystick has been opened, or 0 if it has not. + */ +int +SDL_JoystickOpened(int device_index) +{ + int i, opened; + + opened = 0; + for (i = 0; SDL_joysticks[i]; ++i) { + if (SDL_joysticks[i]->index == (Uint8) device_index) { + opened = 1; + break; + } + } + return (opened); +} + + +/* + * Checks to make sure the joystick is valid. + */ +int +SDL_PrivateJoystickValid(SDL_Joystick ** joystick) +{ + int valid; + + if (*joystick == NULL) { + *joystick = default_joystick; + } + if (*joystick == NULL) { + SDL_SetError("Joystick hasn't been opened yet"); + valid = 0; + } else { + valid = 1; + } + return valid; +} + +/* + * Get the device index of an opened joystick. + */ +int +SDL_JoystickIndex(SDL_Joystick * joystick) +{ + if (!SDL_PrivateJoystickValid(&joystick)) { + return (-1); + } + return (joystick->index); +} + +/* + * Get the number of multi-dimensional axis controls on a joystick + */ +int +SDL_JoystickNumAxes(SDL_Joystick * joystick) +{ + if (!SDL_PrivateJoystickValid(&joystick)) { + return (-1); + } + return (joystick->naxes); +} + +/* + * Get the number of hats on a joystick + */ +int +SDL_JoystickNumHats(SDL_Joystick * joystick) +{ + if (!SDL_PrivateJoystickValid(&joystick)) { + return (-1); + } + return (joystick->nhats); +} + +/* + * Get the number of trackballs on a joystick + */ +int +SDL_JoystickNumBalls(SDL_Joystick * joystick) +{ + if (!SDL_PrivateJoystickValid(&joystick)) { + return (-1); + } + return (joystick->nballs); +} + +/* + * Get the number of buttons on a joystick + */ +int +SDL_JoystickNumButtons(SDL_Joystick * joystick) +{ + if (!SDL_PrivateJoystickValid(&joystick)) { + return (-1); + } + return (joystick->nbuttons); +} + +/* + * Get the current state of an axis control on a joystick + */ +Sint16 +SDL_JoystickGetAxis(SDL_Joystick * joystick, int axis) +{ + Sint16 state; + + if (!SDL_PrivateJoystickValid(&joystick)) { + return (0); + } + if (axis < joystick->naxes) { + state = joystick->axes[axis]; + } else { + SDL_SetError("Joystick only has %d axes", joystick->naxes); + state = 0; + } + return (state); +} + +/* + * Get the current state of a hat on a joystick + */ +Uint8 +SDL_JoystickGetHat(SDL_Joystick * joystick, int hat) +{ + Uint8 state; + + if (!SDL_PrivateJoystickValid(&joystick)) { + return (0); + } + if (hat < joystick->nhats) { + state = joystick->hats[hat]; + } else { + SDL_SetError("Joystick only has %d hats", joystick->nhats); + state = 0; + } + return (state); +} + +/* + * Get the ball axis change since the last poll + */ +int +SDL_JoystickGetBall(SDL_Joystick * joystick, int ball, int *dx, int *dy) +{ + int retval; + + if (!SDL_PrivateJoystickValid(&joystick)) { + return (-1); + } + + retval = 0; + if (ball < joystick->nballs) { + if (dx) { + *dx = joystick->balls[ball].dx; + } + if (dy) { + *dy = joystick->balls[ball].dy; + } + joystick->balls[ball].dx = 0; + joystick->balls[ball].dy = 0; + } else { + SDL_SetError("Joystick only has %d balls", joystick->nballs); + retval = -1; + } + return (retval); +} + +/* + * Get the current state of a button on a joystick + */ +Uint8 +SDL_JoystickGetButton(SDL_Joystick * joystick, int button) +{ + Uint8 state; + + if (!SDL_PrivateJoystickValid(&joystick)) { + return (0); + } + if (button < joystick->nbuttons) { + state = joystick->buttons[button]; + } else { + SDL_SetError("Joystick only has %d buttons", joystick->nbuttons); + state = 0; + } + return (state); +} + +/* + * Close a joystick previously opened with SDL_JoystickOpen() + */ +void +SDL_JoystickClose(SDL_Joystick * joystick) +{ + int i; + + if (!SDL_PrivateJoystickValid(&joystick)) { + return; + } + + /* First decrement ref count */ + if (--joystick->ref_count > 0) { + return; + } + + /* Lock the event queue - prevent joystick polling */ + SDL_Lock_EventThread(); + + if (joystick == default_joystick) { + default_joystick = NULL; + } + SDL_SYS_JoystickClose(joystick); + + /* Remove joystick from list */ + for (i = 0; SDL_joysticks[i]; ++i) { + if (joystick == SDL_joysticks[i]) { + SDL_memmove(&SDL_joysticks[i], &SDL_joysticks[i + 1], + (SDL_numjoysticks - i) * sizeof(joystick)); + break; + } + } + + /* Let the event thread keep running */ + SDL_Unlock_EventThread(); + + /* Free the data associated with this joystick */ + if (joystick->axes) { + SDL_free(joystick->axes); + } + if (joystick->hats) { + SDL_free(joystick->hats); + } + if (joystick->balls) { + SDL_free(joystick->balls); + } + if (joystick->buttons) { + SDL_free(joystick->buttons); + } + SDL_free(joystick); +} + +void +SDL_JoystickQuit(void) +{ + /* Stop the event polling */ + SDL_Lock_EventThread(); + SDL_numjoysticks = 0; + SDL_Unlock_EventThread(); + + /* Quit the joystick setup */ + SDL_SYS_JoystickQuit(); + if (SDL_joysticks) { + SDL_free(SDL_joysticks); + SDL_joysticks = NULL; + } +} + + +/* These are global for SDL_sysjoystick.c and SDL_events.c */ + +int +SDL_PrivateJoystickAxis(SDL_Joystick * joystick, Uint8 axis, Sint16 value) +{ + int posted; + + /* Update internal joystick state */ + joystick->axes[axis] = value; + + /* Post the event, if desired */ + posted = 0; + + return (posted); +} + +int +SDL_PrivateJoystickHat(SDL_Joystick * joystick, Uint8 hat, Uint8 value) +{ + int posted; + + /* Update internal joystick state */ + joystick->hats[hat] = value; + + /* Post the event, if desired */ + posted = 0; + + return (posted); +} + +int +SDL_PrivateJoystickBall(SDL_Joystick * joystick, Uint8 ball, + Sint16 xrel, Sint16 yrel) +{ + int posted; + + /* Update internal mouse state */ + joystick->balls[ball].dx += xrel; + joystick->balls[ball].dy += yrel; + + /* Post the event, if desired */ + posted = 0; + + return (posted); +} + +int +SDL_PrivateJoystickButton(SDL_Joystick * joystick, Uint8 button, Uint8 state) +{ + int posted; + + /* Update internal joystick state */ + joystick->buttons[button] = state; + + /* Post the event, if desired */ + posted = 0; + + return (posted); +} + +void +SDL_JoystickUpdate(void) +{ + int i; + + for (i = 0; SDL_joysticks[i]; ++i) { + SDL_SYS_JoystickUpdate(SDL_joysticks[i]); + } +} + +int +SDL_JoystickEventState(int state) +{ + return SDL_IGNORE; +} |