| /* |
| Simple DirectMedia Layer |
| Copyright (C) 1997-2017 Sam Lantinga <slouken@libsdl.org> |
| |
| 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" |
| |
| /* This is the game controller API for Simple DirectMedia Layer */ |
| |
| #include "SDL_events.h" |
| #include "SDL_assert.h" |
| #include "SDL_sysjoystick.h" |
| #include "SDL_joystick_c.h" |
| #include "SDL_hints.h" |
| #include "SDL_gamecontrollerdb.h" |
| |
| #if !SDL_EVENTS_DISABLED |
| #include "../events/SDL_events_c.h" |
| #endif |
| |
| #if defined(__ANDROID__) |
| #include "SDL_system.h" |
| #endif |
| |
| |
| #define SDL_CONTROLLER_PLATFORM_FIELD "platform:" |
| |
| /* a list of currently opened game controllers */ |
| static SDL_GameController *SDL_gamecontrollers = NULL; |
| |
| typedef struct |
| { |
| SDL_GameControllerBindType inputType; |
| union |
| { |
| int button; |
| |
| struct { |
| int axis; |
| int axis_min; |
| int axis_max; |
| } axis; |
| |
| struct { |
| int hat; |
| int hat_mask; |
| } hat; |
| |
| } input; |
| |
| SDL_GameControllerBindType outputType; |
| union |
| { |
| SDL_GameControllerButton button; |
| |
| struct { |
| SDL_GameControllerAxis axis; |
| int axis_min; |
| int axis_max; |
| } axis; |
| |
| } output; |
| |
| } SDL_ExtendedGameControllerBind; |
| |
| /* our hard coded list of mapping support */ |
| typedef enum |
| { |
| SDL_CONTROLLER_MAPPING_PRIORITY_DEFAULT, |
| SDL_CONTROLLER_MAPPING_PRIORITY_API, |
| SDL_CONTROLLER_MAPPING_PRIORITY_USER, |
| } SDL_ControllerMappingPriority; |
| |
| typedef struct _ControllerMapping_t |
| { |
| SDL_JoystickGUID guid; |
| char *name; |
| char *mapping; |
| SDL_ControllerMappingPriority priority; |
| struct _ControllerMapping_t *next; |
| } ControllerMapping_t; |
| |
| static SDL_JoystickGUID s_zeroGUID; |
| static ControllerMapping_t *s_pSupportedControllers = NULL; |
| static ControllerMapping_t *s_pXInputMapping = NULL; |
| static ControllerMapping_t *s_pEmscriptenMapping = NULL; |
| |
| /* The SDL game controller structure */ |
| struct _SDL_GameController |
| { |
| SDL_Joystick *joystick; /* underlying joystick device */ |
| int ref_count; |
| |
| SDL_JoystickGUID guid; |
| const char *name; |
| int num_bindings; |
| SDL_ExtendedGameControllerBind *bindings; |
| SDL_ExtendedGameControllerBind **last_match_axis; |
| Uint8 *last_hat_mask; |
| |
| struct _SDL_GameController *next; /* pointer to next game controller we have allocated */ |
| }; |
| |
| |
| typedef struct |
| { |
| int num_entries; |
| int max_entries; |
| Uint32 *entries; |
| } SDL_vidpid_list; |
| |
| static SDL_vidpid_list SDL_allowed_controllers; |
| static SDL_vidpid_list SDL_ignored_controllers; |
| |
| static void |
| SDL_LoadVIDPIDListFromHint(const char *hint, SDL_vidpid_list *list) |
| { |
| Uint32 entry; |
| char *spot; |
| char *file = NULL; |
| |
| list->num_entries = 0; |
| |
| if (hint && *hint == '@') { |
| spot = file = (char *)SDL_LoadFile(hint+1, NULL); |
| } else { |
| spot = (char *)hint; |
| } |
| |
| if (!spot) { |
| return; |
| } |
| |
| while ((spot = SDL_strstr(spot, "0x")) != NULL) { |
| entry = (Uint16)SDL_strtol(spot, &spot, 0); |
| entry <<= 16; |
| spot = SDL_strstr(spot, "0x"); |
| if (!spot) { |
| break; |
| } |
| entry |= (Uint16)SDL_strtol(spot, &spot, 0); |
| |
| if (list->num_entries == list->max_entries) { |
| int max_entries = list->max_entries + 16; |
| Uint32 *entries = (Uint32 *)SDL_realloc(list->entries, max_entries*sizeof(*list->entries)); |
| if (entries == NULL) { |
| /* Out of memory, go with what we have already */ |
| break; |
| } |
| list->entries = entries; |
| list->max_entries = max_entries; |
| } |
| list->entries[list->num_entries++] = entry; |
| } |
| |
| if (file) { |
| SDL_free(file); |
| } |
| } |
| |
| static void SDLCALL |
| SDL_GameControllerIgnoreDevicesChanged(void *userdata, const char *name, const char *oldValue, const char *hint) |
| { |
| SDL_LoadVIDPIDListFromHint(hint, &SDL_ignored_controllers); |
| } |
| |
| static void SDLCALL |
| SDL_GameControllerIgnoreDevicesExceptChanged(void *userdata, const char *name, const char *oldValue, const char *hint) |
| { |
| SDL_LoadVIDPIDListFromHint(hint, &SDL_allowed_controllers); |
| } |
| |
| static int SDL_PrivateGameControllerAxis(SDL_GameController * gamecontroller, SDL_GameControllerAxis axis, Sint16 value); |
| static int SDL_PrivateGameControllerButton(SDL_GameController * gamecontroller, SDL_GameControllerButton button, Uint8 state); |
| |
| /* |
| * If there is an existing add event in the queue, it needs to be modified |
| * to have the right value for which, because the number of controllers in |
| * the system is now one less. |
| */ |
| static void UpdateEventsForDeviceRemoval() |
| { |
| int i, num_events; |
| SDL_Event *events; |
| |
| num_events = SDL_PeepEvents(NULL, 0, SDL_PEEKEVENT, SDL_CONTROLLERDEVICEADDED, SDL_CONTROLLERDEVICEADDED); |
| if (num_events <= 0) { |
| return; |
| } |
| |
| events = SDL_stack_alloc(SDL_Event, num_events); |
| if (!events) { |
| return; |
| } |
| |
| num_events = SDL_PeepEvents(events, num_events, SDL_GETEVENT, SDL_CONTROLLERDEVICEADDED, SDL_CONTROLLERDEVICEADDED); |
| for (i = 0; i < num_events; ++i) { |
| --events[i].cdevice.which; |
| } |
| SDL_PeepEvents(events, num_events, SDL_ADDEVENT, 0, 0); |
| |
| SDL_stack_free(events); |
| } |
| |
| static SDL_bool HasSameOutput(SDL_ExtendedGameControllerBind *a, SDL_ExtendedGameControllerBind *b) |
| { |
| if (a->outputType != b->outputType) { |
| return SDL_FALSE; |
| } |
| |
| if (a->outputType == SDL_CONTROLLER_BINDTYPE_AXIS) { |
| return (a->output.axis.axis == b->output.axis.axis); |
| } else { |
| return (a->output.button == b->output.button); |
| } |
| } |
| |
| static void ResetOutput(SDL_GameController *gamecontroller, SDL_ExtendedGameControllerBind *bind) |
| { |
| if (bind->outputType == SDL_CONTROLLER_BINDTYPE_AXIS) { |
| SDL_PrivateGameControllerAxis(gamecontroller, bind->output.axis.axis, 0); |
| } else { |
| SDL_PrivateGameControllerButton(gamecontroller, bind->output.button, SDL_RELEASED); |
| } |
| } |
| |
| static void HandleJoystickAxis(SDL_GameController *gamecontroller, int axis, int value) |
| { |
| int i; |
| SDL_ExtendedGameControllerBind *last_match = gamecontroller->last_match_axis[axis]; |
| SDL_ExtendedGameControllerBind *match = NULL; |
| |
| for (i = 0; i < gamecontroller->num_bindings; ++i) { |
| SDL_ExtendedGameControllerBind *binding = &gamecontroller->bindings[i]; |
| if (binding->inputType == SDL_CONTROLLER_BINDTYPE_AXIS && |
| axis == binding->input.axis.axis) { |
| if (binding->input.axis.axis_min < binding->input.axis.axis_max) { |
| if (value >= binding->input.axis.axis_min && |
| value <= binding->input.axis.axis_max) { |
| match = binding; |
| break; |
| } |
| } else { |
| if (value >= binding->input.axis.axis_max && |
| value <= binding->input.axis.axis_min) { |
| match = binding; |
| break; |
| } |
| } |
| } |
| } |
| |
| if (last_match && (!match || !HasSameOutput(last_match, match))) { |
| /* Clear the last input that this axis generated */ |
| ResetOutput(gamecontroller, last_match); |
| } |
| |
| if (match) { |
| if (match->outputType == SDL_CONTROLLER_BINDTYPE_AXIS) { |
| if (match->input.axis.axis_min != match->output.axis.axis_min || match->input.axis.axis_max != match->output.axis.axis_max) { |
| float normalized_value = (float)(value - match->input.axis.axis_min) / (match->input.axis.axis_max - match->input.axis.axis_min); |
| value = match->output.axis.axis_min + (int)(normalized_value * (match->output.axis.axis_max - match->output.axis.axis_min)); |
| } |
| SDL_PrivateGameControllerAxis(gamecontroller, match->output.axis.axis, (Sint16)value); |
| } else { |
| Uint8 state; |
| int threshold = match->input.axis.axis_min + (match->input.axis.axis_max - match->input.axis.axis_min) / 2; |
| if (match->input.axis.axis_max < match->input.axis.axis_min) { |
| state = (value <= threshold) ? SDL_PRESSED : SDL_RELEASED; |
| } else { |
| state = (value >= threshold) ? SDL_PRESSED : SDL_RELEASED; |
| } |
| SDL_PrivateGameControllerButton(gamecontroller, match->output.button, state); |
| } |
| } |
| gamecontroller->last_match_axis[axis] = match; |
| } |
| |
| static void HandleJoystickButton(SDL_GameController *gamecontroller, int button, Uint8 state) |
| { |
| int i; |
| |
| for (i = 0; i < gamecontroller->num_bindings; ++i) { |
| SDL_ExtendedGameControllerBind *binding = &gamecontroller->bindings[i]; |
| if (binding->inputType == SDL_CONTROLLER_BINDTYPE_BUTTON && |
| button == binding->input.button) { |
| if (binding->outputType == SDL_CONTROLLER_BINDTYPE_AXIS) { |
| int value = state ? binding->output.axis.axis_max : binding->output.axis.axis_min; |
| SDL_PrivateGameControllerAxis(gamecontroller, binding->output.axis.axis, (Sint16)value); |
| } else { |
| SDL_PrivateGameControllerButton(gamecontroller, binding->output.button, state); |
| } |
| break; |
| } |
| } |
| } |
| |
| static void HandleJoystickHat(SDL_GameController *gamecontroller, int hat, Uint8 value) |
| { |
| int i; |
| Uint8 last_mask = gamecontroller->last_hat_mask[hat]; |
| Uint8 changed_mask = (last_mask ^ value); |
| |
| for (i = 0; i < gamecontroller->num_bindings; ++i) { |
| SDL_ExtendedGameControllerBind *binding = &gamecontroller->bindings[i]; |
| if (binding->inputType == SDL_CONTROLLER_BINDTYPE_HAT && hat == binding->input.hat.hat) { |
| if ((changed_mask & binding->input.hat.hat_mask) != 0) { |
| if (value & binding->input.hat.hat_mask) { |
| if (binding->outputType == SDL_CONTROLLER_BINDTYPE_AXIS) { |
| SDL_PrivateGameControllerAxis(gamecontroller, binding->output.axis.axis, (Sint16)binding->output.axis.axis_max); |
| } else { |
| SDL_PrivateGameControllerButton(gamecontroller, binding->output.button, SDL_PRESSED); |
| } |
| } else { |
| ResetOutput(gamecontroller, binding); |
| } |
| } |
| } |
| } |
| gamecontroller->last_hat_mask[hat] = value; |
| } |
| |
| /* |
| * Event filter to fire controller events from joystick ones |
| */ |
| static int SDLCALL SDL_GameControllerEventWatcher(void *userdata, SDL_Event * event) |
| { |
| switch(event->type) { |
| case SDL_JOYAXISMOTION: |
| { |
| SDL_GameController *controllerlist = SDL_gamecontrollers; |
| while (controllerlist) { |
| if (controllerlist->joystick->instance_id == event->jaxis.which) { |
| HandleJoystickAxis(controllerlist, event->jaxis.axis, event->jaxis.value); |
| break; |
| } |
| controllerlist = controllerlist->next; |
| } |
| } |
| break; |
| case SDL_JOYBUTTONDOWN: |
| case SDL_JOYBUTTONUP: |
| { |
| SDL_GameController *controllerlist = SDL_gamecontrollers; |
| while (controllerlist) { |
| if (controllerlist->joystick->instance_id == event->jbutton.which) { |
| HandleJoystickButton(controllerlist, event->jbutton.button, event->jbutton.state); |
| break; |
| } |
| controllerlist = controllerlist->next; |
| } |
| } |
| break; |
| case SDL_JOYHATMOTION: |
| { |
| SDL_GameController *controllerlist = SDL_gamecontrollers; |
| while (controllerlist) { |
| if (controllerlist->joystick->instance_id == event->jhat.which) { |
| HandleJoystickHat(controllerlist, event->jhat.hat, event->jhat.value); |
| break; |
| } |
| controllerlist = controllerlist->next; |
| } |
| } |
| break; |
| case SDL_JOYDEVICEADDED: |
| { |
| if (SDL_IsGameController(event->jdevice.which)) { |
| SDL_Event deviceevent; |
| deviceevent.type = SDL_CONTROLLERDEVICEADDED; |
| deviceevent.cdevice.which = event->jdevice.which; |
| SDL_PushEvent(&deviceevent); |
| } |
| } |
| break; |
| case SDL_JOYDEVICEREMOVED: |
| { |
| SDL_GameController *controllerlist = SDL_gamecontrollers; |
| while (controllerlist) { |
| if (controllerlist->joystick->instance_id == event->jdevice.which) { |
| SDL_Event deviceevent; |
| |
| deviceevent.type = SDL_CONTROLLERDEVICEREMOVED; |
| deviceevent.cdevice.which = event->jdevice.which; |
| SDL_PushEvent(&deviceevent); |
| |
| UpdateEventsForDeviceRemoval(); |
| break; |
| } |
| controllerlist = controllerlist->next; |
| } |
| } |
| break; |
| default: |
| break; |
| } |
| |
| return 1; |
| } |
| |
| /* |
| * Helper function to scan the mappings database for a controller with the specified GUID |
| */ |
| static ControllerMapping_t *SDL_PrivateGetControllerMappingForGUID(SDL_JoystickGUID *guid) |
| { |
| ControllerMapping_t *pSupportedController = s_pSupportedControllers; |
| while (pSupportedController) { |
| if (SDL_memcmp(guid, &pSupportedController->guid, sizeof(*guid)) == 0) { |
| return pSupportedController; |
| } |
| pSupportedController = pSupportedController->next; |
| } |
| return NULL; |
| } |
| |
| static const char* map_StringForControllerAxis[] = { |
| "leftx", |
| "lefty", |
| "rightx", |
| "righty", |
| "lefttrigger", |
| "righttrigger", |
| NULL |
| }; |
| |
| /* |
| * convert a string to its enum equivalent |
| */ |
| SDL_GameControllerAxis SDL_GameControllerGetAxisFromString(const char *pchString) |
| { |
| int entry; |
| |
| if (pchString && (*pchString == '+' || *pchString == '-')) { |
| ++pchString; |
| } |
| |
| if (!pchString || !pchString[0]) { |
| return SDL_CONTROLLER_AXIS_INVALID; |
| } |
| |
| for (entry = 0; map_StringForControllerAxis[entry]; ++entry) { |
| if (!SDL_strcasecmp(pchString, map_StringForControllerAxis[entry])) |
| return (SDL_GameControllerAxis) entry; |
| } |
| return SDL_CONTROLLER_AXIS_INVALID; |
| } |
| |
| /* |
| * convert an enum to its string equivalent |
| */ |
| const char* SDL_GameControllerGetStringForAxis(SDL_GameControllerAxis axis) |
| { |
| if (axis > SDL_CONTROLLER_AXIS_INVALID && axis < SDL_CONTROLLER_AXIS_MAX) { |
| return map_StringForControllerAxis[axis]; |
| } |
| return NULL; |
| } |
| |
| static const char* map_StringForControllerButton[] = { |
| "a", |
| "b", |
| "x", |
| "y", |
| "back", |
| "guide", |
| "start", |
| "leftstick", |
| "rightstick", |
| "leftshoulder", |
| "rightshoulder", |
| "dpup", |
| "dpdown", |
| "dpleft", |
| "dpright", |
| NULL |
| }; |
| |
| /* |
| * convert a string to its enum equivalent |
| */ |
| SDL_GameControllerButton SDL_GameControllerGetButtonFromString(const char *pchString) |
| { |
| int entry; |
| if (!pchString || !pchString[0]) |
| return SDL_CONTROLLER_BUTTON_INVALID; |
| |
| for (entry = 0; map_StringForControllerButton[entry]; ++entry) { |
| if (SDL_strcasecmp(pchString, map_StringForControllerButton[entry]) == 0) |
| return (SDL_GameControllerButton) entry; |
| } |
| return SDL_CONTROLLER_BUTTON_INVALID; |
| } |
| |
| /* |
| * convert an enum to its string equivalent |
| */ |
| const char* SDL_GameControllerGetStringForButton(SDL_GameControllerButton axis) |
| { |
| if (axis > SDL_CONTROLLER_BUTTON_INVALID && axis < SDL_CONTROLLER_BUTTON_MAX) { |
| return map_StringForControllerButton[axis]; |
| } |
| return NULL; |
| } |
| |
| /* |
| * given a controller button name and a joystick name update our mapping structure with it |
| */ |
| static void SDL_PrivateGameControllerParseElement(SDL_GameController *gamecontroller, const char *szGameButton, const char *szJoystickButton) |
| { |
| SDL_ExtendedGameControllerBind bind; |
| SDL_GameControllerButton button; |
| SDL_GameControllerAxis axis; |
| SDL_bool invert_input = SDL_FALSE; |
| char half_axis_input = 0; |
| char half_axis_output = 0; |
| |
| if (*szGameButton == '+' || *szGameButton == '-') { |
| half_axis_output = *szGameButton++; |
| } |
| |
| axis = SDL_GameControllerGetAxisFromString(szGameButton); |
| button = SDL_GameControllerGetButtonFromString(szGameButton); |
| if (axis != SDL_CONTROLLER_AXIS_INVALID) { |
| bind.outputType = SDL_CONTROLLER_BINDTYPE_AXIS; |
| bind.output.axis.axis = axis; |
| if (axis == SDL_CONTROLLER_AXIS_TRIGGERLEFT || axis == SDL_CONTROLLER_AXIS_TRIGGERRIGHT) { |
| bind.output.axis.axis_min = 0; |
| bind.output.axis.axis_max = SDL_JOYSTICK_AXIS_MAX; |
| } else { |
| if (half_axis_output == '+') { |
| bind.output.axis.axis_min = 0; |
| bind.output.axis.axis_max = SDL_JOYSTICK_AXIS_MAX; |
| } else if (half_axis_output == '-') { |
| bind.output.axis.axis_min = 0; |
| bind.output.axis.axis_max = SDL_JOYSTICK_AXIS_MIN; |
| } else { |
| bind.output.axis.axis_min = SDL_JOYSTICK_AXIS_MIN; |
| bind.output.axis.axis_max = SDL_JOYSTICK_AXIS_MAX; |
| } |
| } |
| } else if (button != SDL_CONTROLLER_BUTTON_INVALID) { |
| bind.outputType = SDL_CONTROLLER_BINDTYPE_BUTTON; |
| bind.output.button = button; |
| } else { |
| SDL_SetError("Unexpected controller element %s", szGameButton); |
| return; |
| } |
| |
| if (*szJoystickButton == '+' || *szJoystickButton == '-') { |
| half_axis_input = *szJoystickButton++; |
| } |
| if (szJoystickButton[SDL_strlen(szJoystickButton) - 1] == '~') { |
| invert_input = SDL_TRUE; |
| } |
| |
| if (szJoystickButton[0] == 'a' && SDL_isdigit(szJoystickButton[1])) { |
| bind.inputType = SDL_CONTROLLER_BINDTYPE_AXIS; |
| bind.input.axis.axis = SDL_atoi(&szJoystickButton[1]); |
| if (half_axis_input == '+') { |
| bind.input.axis.axis_min = 0; |
| bind.input.axis.axis_max = SDL_JOYSTICK_AXIS_MAX; |
| } else if (half_axis_input == '-') { |
| bind.input.axis.axis_min = 0; |
| bind.input.axis.axis_max = SDL_JOYSTICK_AXIS_MIN; |
| } else { |
| bind.input.axis.axis_min = SDL_JOYSTICK_AXIS_MIN; |
| bind.input.axis.axis_max = SDL_JOYSTICK_AXIS_MAX; |
| } |
| if (invert_input) { |
| int tmp = bind.input.axis.axis_min; |
| bind.input.axis.axis_min = bind.input.axis.axis_max; |
| bind.input.axis.axis_max = tmp; |
| } |
| } else if (szJoystickButton[0] == 'b' && SDL_isdigit(szJoystickButton[1])) { |
| bind.inputType = SDL_CONTROLLER_BINDTYPE_BUTTON; |
| bind.input.button = SDL_atoi(&szJoystickButton[1]); |
| } else if (szJoystickButton[0] == 'h' && SDL_isdigit(szJoystickButton[1]) && |
| szJoystickButton[2] == '.' && SDL_isdigit(szJoystickButton[3])) { |
| int hat = SDL_atoi(&szJoystickButton[1]); |
| int mask = SDL_atoi(&szJoystickButton[3]); |
| bind.inputType = SDL_CONTROLLER_BINDTYPE_HAT; |
| bind.input.hat.hat = hat; |
| bind.input.hat.hat_mask = mask; |
| } else { |
| SDL_SetError("Unexpected joystick element: %s", szJoystickButton); |
| return; |
| } |
| |
| ++gamecontroller->num_bindings; |
| gamecontroller->bindings = (SDL_ExtendedGameControllerBind *)SDL_realloc(gamecontroller->bindings, gamecontroller->num_bindings * sizeof(*gamecontroller->bindings)); |
| if (!gamecontroller->bindings) { |
| gamecontroller->num_bindings = 0; |
| SDL_OutOfMemory(); |
| return; |
| } |
| gamecontroller->bindings[gamecontroller->num_bindings - 1] = bind; |
| } |
| |
| |
| /* |
| * given a controller mapping string update our mapping object |
| */ |
| static void |
| SDL_PrivateGameControllerParseControllerConfigString(SDL_GameController *gamecontroller, const char *pchString) |
| { |
| char szGameButton[20]; |
| char szJoystickButton[20]; |
| SDL_bool bGameButton = SDL_TRUE; |
| int i = 0; |
| const char *pchPos = pchString; |
| |
| SDL_zero(szGameButton); |
| SDL_zero(szJoystickButton); |
| |
| while (pchPos && *pchPos) { |
| if (*pchPos == ':') { |
| i = 0; |
| bGameButton = SDL_FALSE; |
| } else if (*pchPos == ' ') { |
| |
| } else if (*pchPos == ',') { |
| i = 0; |
| bGameButton = SDL_TRUE; |
| SDL_PrivateGameControllerParseElement(gamecontroller, szGameButton, szJoystickButton); |
| SDL_zero(szGameButton); |
| SDL_zero(szJoystickButton); |
| |
| } else if (bGameButton) { |
| if (i >= sizeof(szGameButton)) { |
| SDL_SetError("Button name too large: %s", szGameButton); |
| return; |
| } |
| szGameButton[i] = *pchPos; |
| i++; |
| } else { |
| if (i >= sizeof(szJoystickButton)) { |
| SDL_SetError("Joystick button name too large: %s", szJoystickButton); |
| return; |
| } |
| szJoystickButton[i] = *pchPos; |
| i++; |
| } |
| pchPos++; |
| } |
| |
| SDL_PrivateGameControllerParseElement(gamecontroller, szGameButton, szJoystickButton); |
| |
| } |
| |
| /* |
| * Make a new button mapping struct |
| */ |
| static void SDL_PrivateLoadButtonMapping(SDL_GameController *gamecontroller, SDL_JoystickGUID guid, const char *pchName, const char *pchMapping) |
| { |
| int i; |
| |
| gamecontroller->guid = guid; |
| gamecontroller->name = pchName; |
| gamecontroller->num_bindings = 0; |
| SDL_memset(gamecontroller->last_match_axis, 0, gamecontroller->joystick->naxes * sizeof(*gamecontroller->last_match_axis)); |
| |
| SDL_PrivateGameControllerParseControllerConfigString(gamecontroller, pchMapping); |
| |
| /* Set the zero point for triggers */ |
| for (i = 0; i < gamecontroller->num_bindings; ++i) { |
| SDL_ExtendedGameControllerBind *binding = &gamecontroller->bindings[i]; |
| if (binding->inputType == SDL_CONTROLLER_BINDTYPE_AXIS && |
| binding->outputType == SDL_CONTROLLER_BINDTYPE_AXIS && |
| (binding->output.axis.axis == SDL_CONTROLLER_AXIS_TRIGGERLEFT || |
| binding->output.axis.axis == SDL_CONTROLLER_AXIS_TRIGGERRIGHT)) { |
| if (binding->input.axis.axis < gamecontroller->joystick->naxes) { |
| gamecontroller->joystick->axes[binding->input.axis.axis].value = |
| gamecontroller->joystick->axes[binding->input.axis.axis].zero = (Sint16)binding->input.axis.axis_min; |
| } |
| } |
| } |
| } |
| |
| |
| /* |
| * grab the guid string from a mapping string |
| */ |
| static char *SDL_PrivateGetControllerGUIDFromMappingString(const char *pMapping) |
| { |
| const char *pFirstComma = SDL_strchr(pMapping, ','); |
| if (pFirstComma) { |
| char *pchGUID = SDL_malloc(pFirstComma - pMapping + 1); |
| if (!pchGUID) { |
| SDL_OutOfMemory(); |
| return NULL; |
| } |
| SDL_memcpy(pchGUID, pMapping, pFirstComma - pMapping); |
| pchGUID[pFirstComma - pMapping] = '\0'; |
| |
| /* Convert old style GUIDs to the new style in 2.0.5 */ |
| #if __WIN32__ |
| if (SDL_strlen(pchGUID) == 32 && |
| SDL_memcmp(&pchGUID[20], "504944564944", 12) == 0) { |
| SDL_memcpy(&pchGUID[20], "000000000000", 12); |
| SDL_memcpy(&pchGUID[16], &pchGUID[4], 4); |
| SDL_memcpy(&pchGUID[8], &pchGUID[0], 4); |
| SDL_memcpy(&pchGUID[0], "03000000", 8); |
| } |
| #elif __MACOSX__ |
| if (SDL_strlen(pchGUID) == 32 && |
| SDL_memcmp(&pchGUID[4], "000000000000", 12) == 0 && |
| SDL_memcmp(&pchGUID[20], "000000000000", 12) == 0) { |
| SDL_memcpy(&pchGUID[20], "000000000000", 12); |
| SDL_memcpy(&pchGUID[8], &pchGUID[0], 4); |
| SDL_memcpy(&pchGUID[0], "03000000", 8); |
| } |
| #endif |
| return pchGUID; |
| } |
| return NULL; |
| } |
| |
| |
| /* |
| * grab the name string from a mapping string |
| */ |
| static char *SDL_PrivateGetControllerNameFromMappingString(const char *pMapping) |
| { |
| const char *pFirstComma, *pSecondComma; |
| char *pchName; |
| |
| pFirstComma = SDL_strchr(pMapping, ','); |
| if (!pFirstComma) |
| return NULL; |
| |
| pSecondComma = SDL_strchr(pFirstComma + 1, ','); |
| if (!pSecondComma) |
| return NULL; |
| |
| pchName = SDL_malloc(pSecondComma - pFirstComma); |
| if (!pchName) { |
| SDL_OutOfMemory(); |
| return NULL; |
| } |
| SDL_memcpy(pchName, pFirstComma + 1, pSecondComma - pFirstComma); |
| pchName[pSecondComma - pFirstComma - 1] = 0; |
| return pchName; |
| } |
| |
| |
| /* |
| * grab the button mapping string from a mapping string |
| */ |
| static char *SDL_PrivateGetControllerMappingFromMappingString(const char *pMapping) |
| { |
| const char *pFirstComma, *pSecondComma; |
| |
| pFirstComma = SDL_strchr(pMapping, ','); |
| if (!pFirstComma) |
| return NULL; |
| |
| pSecondComma = SDL_strchr(pFirstComma + 1, ','); |
| if (!pSecondComma) |
| return NULL; |
| |
| return SDL_strdup(pSecondComma + 1); /* mapping is everything after the 3rd comma */ |
| } |
| |
| /* |
| * Helper function to refresh a mapping |
| */ |
| static void SDL_PrivateGameControllerRefreshMapping(ControllerMapping_t *pControllerMapping) |
| { |
| SDL_GameController *gamecontrollerlist = SDL_gamecontrollers; |
| while (gamecontrollerlist) { |
| if (!SDL_memcmp(&gamecontrollerlist->guid, &pControllerMapping->guid, sizeof(pControllerMapping->guid))) { |
| SDL_Event event; |
| event.type = SDL_CONTROLLERDEVICEREMAPPED; |
| event.cdevice.which = gamecontrollerlist->joystick->instance_id; |
| SDL_PushEvent(&event); |
| |
| /* Not really threadsafe. Should this lock access within SDL_GameControllerEventWatcher? */ |
| SDL_PrivateLoadButtonMapping(gamecontrollerlist, pControllerMapping->guid, pControllerMapping->name, pControllerMapping->mapping); |
| } |
| |
| gamecontrollerlist = gamecontrollerlist->next; |
| } |
| } |
| |
| /* |
| * Helper function to add a mapping for a guid |
| */ |
| static ControllerMapping_t * |
| SDL_PrivateAddMappingForGUID(SDL_JoystickGUID jGUID, const char *mappingString, SDL_bool *existing, SDL_ControllerMappingPriority priority) |
| { |
| char *pchName; |
| char *pchMapping; |
| ControllerMapping_t *pControllerMapping; |
| |
| pchName = SDL_PrivateGetControllerNameFromMappingString(mappingString); |
| if (!pchName) { |
| SDL_SetError("Couldn't parse name from %s", mappingString); |
| return NULL; |
| } |
| |
| pchMapping = SDL_PrivateGetControllerMappingFromMappingString(mappingString); |
| if (!pchMapping) { |
| SDL_free(pchName); |
| SDL_SetError("Couldn't parse %s", mappingString); |
| return NULL; |
| } |
| |
| pControllerMapping = SDL_PrivateGetControllerMappingForGUID(&jGUID); |
| if (pControllerMapping) { |
| /* Only overwrite the mapping if the priority is the same or higher. */ |
| if (pControllerMapping->priority <= priority) { |
| /* Update existing mapping */ |
| SDL_free(pControllerMapping->name); |
| pControllerMapping->name = pchName; |
| SDL_free(pControllerMapping->mapping); |
| pControllerMapping->mapping = pchMapping; |
| pControllerMapping->priority = priority; |
| /* refresh open controllers */ |
| SDL_PrivateGameControllerRefreshMapping(pControllerMapping); |
| } else { |
| SDL_free(pchName); |
| SDL_free(pchMapping); |
| } |
| *existing = SDL_TRUE; |
| } else { |
| pControllerMapping = SDL_malloc(sizeof(*pControllerMapping)); |
| if (!pControllerMapping) { |
| SDL_free(pchName); |
| SDL_free(pchMapping); |
| SDL_OutOfMemory(); |
| return NULL; |
| } |
| pControllerMapping->guid = jGUID; |
| pControllerMapping->name = pchName; |
| pControllerMapping->mapping = pchMapping; |
| pControllerMapping->next = NULL; |
| pControllerMapping->priority = priority; |
| |
| if (s_pSupportedControllers) { |
| /* Add the mapping to the end of the list */ |
| ControllerMapping_t *pCurrMapping, *pPrevMapping; |
| |
| for ( pPrevMapping = s_pSupportedControllers, pCurrMapping = pPrevMapping->next; |
| pCurrMapping; |
| pPrevMapping = pCurrMapping, pCurrMapping = pCurrMapping->next ) { |
| continue; |
| } |
| pPrevMapping->next = pControllerMapping; |
| } else { |
| s_pSupportedControllers = pControllerMapping; |
| } |
| *existing = SDL_FALSE; |
| } |
| return pControllerMapping; |
| } |
| |
| /* |
| * Helper function to determine pre-calculated offset to certain joystick mappings |
| */ |
| static ControllerMapping_t *SDL_PrivateGetControllerMappingForNameAndGUID(const char *name, SDL_JoystickGUID guid) |
| { |
| ControllerMapping_t *mapping; |
| |
| mapping = SDL_PrivateGetControllerMappingForGUID(&guid); |
| #if defined(SDL_JOYSTICK_EMSCRIPTEN) |
| if (!mapping && s_pEmscriptenMapping) { |
| mapping = s_pEmscriptenMapping; |
| } |
| #else |
| (void) s_pEmscriptenMapping; /* pacify ARMCC */ |
| #endif |
| #ifdef __LINUX__ |
| if (!mapping && name) { |
| if (SDL_strstr(name, "Xbox 360 Wireless Receiver")) { |
| /* The Linux driver xpad.c maps the wireless dpad to buttons */ |
| SDL_bool existing; |
| mapping = SDL_PrivateAddMappingForGUID(guid, |
| "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,", |
| &existing, SDL_CONTROLLER_MAPPING_PRIORITY_DEFAULT); |
| } |
| } |
| #endif /* __LINUX__ */ |
| |
| if (!mapping && name) { |
| if (SDL_strstr(name, "Xbox") || SDL_strstr(name, "X-Box") || SDL_strstr(name, "XBOX")) { |
| mapping = s_pXInputMapping; |
| } |
| } |
| return mapping; |
| } |
| |
| static ControllerMapping_t *SDL_PrivateGetControllerMapping(int device_index) |
| { |
| const char *name = SDL_JoystickNameForIndex(device_index); |
| SDL_JoystickGUID guid = SDL_JoystickGetDeviceGUID(device_index); |
| ControllerMapping_t *mapping = SDL_PrivateGetControllerMappingForNameAndGUID(name, guid); |
| #if SDL_JOYSTICK_XINPUT |
| if (!mapping && SDL_SYS_IsXInputGamepad_DeviceIndex(device_index)) { |
| mapping = s_pXInputMapping; |
| } |
| #endif |
| return mapping; |
| } |
| |
| /* |
| * Add or update an entry into the Mappings Database |
| */ |
| int |
| SDL_GameControllerAddMappingsFromRW(SDL_RWops * rw, int freerw) |
| { |
| const char *platform = SDL_GetPlatform(); |
| int controllers = 0; |
| char *buf, *line, *line_end, *tmp, *comma, line_platform[64]; |
| size_t db_size, platform_len; |
| |
| if (rw == NULL) { |
| return SDL_SetError("Invalid RWops"); |
| } |
| db_size = (size_t)SDL_RWsize(rw); |
| |
| buf = (char *)SDL_malloc(db_size + 1); |
| if (buf == NULL) { |
| if (freerw) { |
| SDL_RWclose(rw); |
| } |
| return SDL_SetError("Could not allocate space to read DB into memory"); |
| } |
| |
| if (SDL_RWread(rw, buf, db_size, 1) != 1) { |
| if (freerw) { |
| SDL_RWclose(rw); |
| } |
| SDL_free(buf); |
| return SDL_SetError("Could not read DB"); |
| } |
| |
| if (freerw) { |
| SDL_RWclose(rw); |
| } |
| |
| buf[db_size] = '\0'; |
| line = buf; |
| |
| while (line < buf + db_size) { |
| line_end = SDL_strchr(line, '\n'); |
| if (line_end != NULL) { |
| *line_end = '\0'; |
| } else { |
| line_end = buf + db_size; |
| } |
| |
| /* Extract and verify the platform */ |
| tmp = SDL_strstr(line, SDL_CONTROLLER_PLATFORM_FIELD); |
| if (tmp != NULL) { |
| tmp += SDL_strlen(SDL_CONTROLLER_PLATFORM_FIELD); |
| comma = SDL_strchr(tmp, ','); |
| if (comma != NULL) { |
| platform_len = comma - tmp + 1; |
| if (platform_len + 1 < SDL_arraysize(line_platform)) { |
| SDL_strlcpy(line_platform, tmp, platform_len); |
| if (SDL_strncasecmp(line_platform, platform, platform_len) == 0 && |
| SDL_GameControllerAddMapping(line) > 0) { |
| controllers++; |
| } |
| } |
| } |
| } |
| |
| line = line_end + 1; |
| } |
| |
| SDL_free(buf); |
| return controllers; |
| } |
| |
| /* |
| * Add or update an entry into the Mappings Database with a priority |
| */ |
| static int |
| SDL_PrivateGameControllerAddMapping(const char *mappingString, SDL_ControllerMappingPriority priority) |
| { |
| char *pchGUID; |
| SDL_JoystickGUID jGUID; |
| SDL_bool is_xinput_mapping = SDL_FALSE; |
| SDL_bool is_emscripten_mapping = SDL_FALSE; |
| SDL_bool existing = SDL_FALSE; |
| ControllerMapping_t *pControllerMapping; |
| |
| if (!mappingString) { |
| return SDL_InvalidParamError("mappingString"); |
| } |
| |
| pchGUID = SDL_PrivateGetControllerGUIDFromMappingString(mappingString); |
| if (!pchGUID) { |
| return SDL_SetError("Couldn't parse GUID from %s", mappingString); |
| } |
| if (!SDL_strcasecmp(pchGUID, "xinput")) { |
| is_xinput_mapping = SDL_TRUE; |
| } |
| if (!SDL_strcasecmp(pchGUID, "emscripten")) { |
| is_emscripten_mapping = SDL_TRUE; |
| } |
| jGUID = SDL_JoystickGetGUIDFromString(pchGUID); |
| SDL_free(pchGUID); |
| |
| pControllerMapping = SDL_PrivateAddMappingForGUID(jGUID, mappingString, &existing, priority); |
| if (!pControllerMapping) { |
| return -1; |
| } |
| |
| if (existing) { |
| return 0; |
| } else { |
| if (is_xinput_mapping) { |
| s_pXInputMapping = pControllerMapping; |
| } |
| if (is_emscripten_mapping) { |
| s_pEmscriptenMapping = pControllerMapping; |
| } |
| return 1; |
| } |
| } |
| |
| /* |
| * Add or update an entry into the Mappings Database |
| */ |
| int |
| SDL_GameControllerAddMapping(const char *mappingString) |
| { |
| return SDL_PrivateGameControllerAddMapping(mappingString, SDL_CONTROLLER_MAPPING_PRIORITY_API); |
| } |
| |
| /* |
| * Get the number of mappings installed |
| */ |
| int |
| SDL_GameControllerNumMappings(void) |
| { |
| int num_mappings = 0; |
| ControllerMapping_t *mapping; |
| |
| for (mapping = s_pSupportedControllers; mapping; mapping = mapping->next) { |
| if (SDL_memcmp(&mapping->guid, &s_zeroGUID, sizeof(mapping->guid)) == 0) { |
| continue; |
| } |
| ++num_mappings; |
| } |
| return num_mappings; |
| } |
| |
| /* |
| * Get the mapping at a particular index. |
| */ |
| char * |
| SDL_GameControllerMappingForIndex(int mapping_index) |
| { |
| ControllerMapping_t *mapping; |
| |
| for (mapping = s_pSupportedControllers; mapping; mapping = mapping->next) { |
| if (SDL_memcmp(&mapping->guid, &s_zeroGUID, sizeof(mapping->guid)) == 0) { |
| continue; |
| } |
| if (mapping_index == 0) { |
| char *pMappingString; |
| char pchGUID[33]; |
| size_t needed; |
| |
| SDL_JoystickGetGUIDString(mapping->guid, pchGUID, sizeof(pchGUID)); |
| /* allocate enough memory for GUID + ',' + name + ',' + mapping + \0 */ |
| needed = SDL_strlen(pchGUID) + 1 + SDL_strlen(mapping->name) + 1 + SDL_strlen(mapping->mapping) + 1; |
| pMappingString = SDL_malloc(needed); |
| if (!pMappingString) { |
| SDL_OutOfMemory(); |
| return NULL; |
| } |
| SDL_snprintf(pMappingString, needed, "%s,%s,%s", pchGUID, mapping->name, mapping->mapping); |
| return pMappingString; |
| } |
| --mapping_index; |
| } |
| return NULL; |
| } |
| |
| /* |
| * Get the mapping string for this GUID |
| */ |
| char * |
| SDL_GameControllerMappingForGUID(SDL_JoystickGUID guid) |
| { |
| char *pMappingString = NULL; |
| ControllerMapping_t *mapping = SDL_PrivateGetControllerMappingForGUID(&guid); |
| if (mapping) { |
| char pchGUID[33]; |
| size_t needed; |
| SDL_JoystickGetGUIDString(guid, pchGUID, sizeof(pchGUID)); |
| /* allocate enough memory for GUID + ',' + name + ',' + mapping + \0 */ |
| needed = SDL_strlen(pchGUID) + 1 + SDL_strlen(mapping->name) + 1 + SDL_strlen(mapping->mapping) + 1; |
| pMappingString = SDL_malloc(needed); |
| if (!pMappingString) { |
| SDL_OutOfMemory(); |
| return NULL; |
| } |
| SDL_snprintf(pMappingString, needed, "%s,%s,%s", pchGUID, mapping->name, mapping->mapping); |
| } |
| return pMappingString; |
| } |
| |
| /* |
| * Get the mapping string for this device |
| */ |
| char * |
| SDL_GameControllerMapping(SDL_GameController * gamecontroller) |
| { |
| if (!gamecontroller) { |
| return NULL; |
| } |
| |
| return SDL_GameControllerMappingForGUID(gamecontroller->guid); |
| } |
| |
| static void |
| SDL_GameControllerLoadHints() |
| { |
| const char *hint = SDL_GetHint(SDL_HINT_GAMECONTROLLERCONFIG); |
| if (hint && hint[0]) { |
| size_t nchHints = SDL_strlen(hint); |
| char *pUserMappings = SDL_malloc(nchHints + 1); |
| char *pTempMappings = pUserMappings; |
| SDL_memcpy(pUserMappings, hint, nchHints); |
| pUserMappings[nchHints] = '\0'; |
| while (pUserMappings) { |
| char *pchNewLine = NULL; |
| |
| pchNewLine = SDL_strchr(pUserMappings, '\n'); |
| if (pchNewLine) |
| *pchNewLine = '\0'; |
| |
| SDL_PrivateGameControllerAddMapping(pUserMappings, SDL_CONTROLLER_MAPPING_PRIORITY_USER); |
| |
| if (pchNewLine) { |
| pUserMappings = pchNewLine + 1; |
| } else { |
| pUserMappings = NULL; |
| } |
| } |
| SDL_free(pTempMappings); |
| } |
| } |
| |
| /* |
| * Fill the given buffer with the expected controller mapping filepath. |
| * Usually this will just be CONTROLLER_MAPPING_FILE, but for Android, |
| * we want to get the internal storage path. |
| */ |
| static SDL_bool SDL_GetControllerMappingFilePath(char *path, size_t size) |
| { |
| #ifdef CONTROLLER_MAPPING_FILE |
| #define STRING(X) SDL_STRINGIFY_ARG(X) |
| return SDL_strlcpy(path, STRING(CONTROLLER_MAPPING_FILE), size) < size; |
| #elif defined(__ANDROID__) |
| return SDL_snprintf(path, size, "%s/controller_map.txt", SDL_AndroidGetInternalStoragePath()) < size; |
| #else |
| return SDL_FALSE; |
| #endif |
| } |
| |
| /* |
| * Initialize the game controller system, mostly load our DB of controller config mappings |
| */ |
| int |
| SDL_GameControllerInitMappings(void) |
| { |
| char szControllerMapPath[1024]; |
| int i = 0; |
| const char *pMappingString = NULL; |
| pMappingString = s_ControllerMappings[i]; |
| while (pMappingString) { |
| SDL_PrivateGameControllerAddMapping(pMappingString, SDL_CONTROLLER_MAPPING_PRIORITY_DEFAULT); |
| |
| i++; |
| pMappingString = s_ControllerMappings[i]; |
| } |
| |
| if (SDL_GetControllerMappingFilePath(szControllerMapPath, sizeof(szControllerMapPath))) { |
| SDL_GameControllerAddMappingsFromFile(szControllerMapPath); |
| } |
| |
| /* load in any user supplied config */ |
| SDL_GameControllerLoadHints(); |
| |
| SDL_AddHintCallback(SDL_HINT_GAMECONTROLLER_IGNORE_DEVICES, |
| SDL_GameControllerIgnoreDevicesChanged, NULL); |
| SDL_AddHintCallback(SDL_HINT_GAMECONTROLLER_IGNORE_DEVICES_EXCEPT, |
| SDL_GameControllerIgnoreDevicesExceptChanged, NULL); |
| |
| return (0); |
| } |
| |
| int |
| SDL_GameControllerInit(void) |
| { |
| int i; |
| |
| /* watch for joy events and fire controller ones if needed */ |
| SDL_AddEventWatch(SDL_GameControllerEventWatcher, NULL); |
| |
| /* Send added events for controllers currently attached */ |
| for (i = 0; i < SDL_NumJoysticks(); ++i) { |
| if (SDL_IsGameController(i)) { |
| SDL_Event deviceevent; |
| deviceevent.type = SDL_CONTROLLERDEVICEADDED; |
| deviceevent.cdevice.which = i; |
| SDL_PushEvent(&deviceevent); |
| } |
| } |
| |
| return (0); |
| } |
| |
| |
| /* |
| * Get the implementation dependent name of a controller |
| */ |
| const char * |
| SDL_GameControllerNameForIndex(int device_index) |
| { |
| ControllerMapping_t *pSupportedController = SDL_PrivateGetControllerMapping(device_index); |
| if (pSupportedController) { |
| return pSupportedController->name; |
| } |
| return NULL; |
| } |
| |
| |
| /* |
| * Return 1 if the joystick with this name and GUID is a supported controller |
| */ |
| SDL_bool |
| SDL_IsGameControllerNameAndGUID(const char *name, SDL_JoystickGUID guid) |
| { |
| ControllerMapping_t *pSupportedController = SDL_PrivateGetControllerMappingForNameAndGUID(name, guid); |
| if (pSupportedController) { |
| return SDL_TRUE; |
| } |
| return SDL_FALSE; |
| } |
| |
| /* |
| * Return 1 if the joystick at this device index is a supported controller |
| */ |
| SDL_bool |
| SDL_IsGameController(int device_index) |
| { |
| ControllerMapping_t *pSupportedController = SDL_PrivateGetControllerMapping(device_index); |
| if (pSupportedController) { |
| return SDL_TRUE; |
| } |
| return SDL_FALSE; |
| } |
| |
| /* |
| * Return 1 if the game controller should be ignored by SDL |
| */ |
| SDL_bool SDL_ShouldIgnoreGameController(const char *name, SDL_JoystickGUID guid) |
| { |
| int i; |
| Uint16 vendor; |
| Uint16 product; |
| Uint32 vidpid; |
| |
| if (SDL_allowed_controllers.num_entries == 0 && |
| SDL_ignored_controllers.num_entries == 0) { |
| return SDL_FALSE; |
| } |
| |
| SDL_GetJoystickGUIDInfo(guid, &vendor, &product, NULL); |
| vidpid = MAKE_VIDPID(vendor, product); |
| |
| if (SDL_GetHintBoolean("SDL_GAMECONTROLLER_ALLOW_STEAM_VIRTUAL_GAMEPAD", SDL_FALSE)) { |
| /* We shouldn't ignore Steam's virtual gamepad since it's using the hints to filter out the real controllers so it can remap input for the virtual controller */ |
| SDL_bool bSteamVirtualGamepad = SDL_FALSE; |
| #if defined(__LINUX__) |
| bSteamVirtualGamepad = (vendor == 0x28DE && product == 0x11FF); |
| #elif defined(__MACOSX__) |
| bSteamVirtualGamepad = (SDL_strncmp(name, "GamePad-", 8) == 0); |
| #elif defined(__WIN32__) |
| /* We can't tell on Windows, but Steam will block others in input hooks */ |
| bSteamVirtualGamepad = SDL_TRUE; |
| #endif |
| if (bSteamVirtualGamepad) { |
| return SDL_FALSE; |
| } |
| } |
| |
| if (SDL_allowed_controllers.num_entries > 0) { |
| for (i = 0; i < SDL_allowed_controllers.num_entries; ++i) { |
| if (vidpid == SDL_allowed_controllers.entries[i]) { |
| return SDL_FALSE; |
| } |
| } |
| return SDL_TRUE; |
| } else { |
| for (i = 0; i < SDL_ignored_controllers.num_entries; ++i) { |
| if (vidpid == SDL_ignored_controllers.entries[i]) { |
| return SDL_TRUE; |
| } |
| } |
| return SDL_FALSE; |
| } |
| } |
| |
| /* |
| * Open a controller for use - the index passed as an argument refers to |
| * the N'th controller on the system. This index is the value which will |
| * identify this controller in future controller events. |
| * |
| * This function returns a controller identifier, or NULL if an error occurred. |
| */ |
| SDL_GameController * |
| SDL_GameControllerOpen(int device_index) |
| { |
| SDL_GameController *gamecontroller; |
| SDL_GameController *gamecontrollerlist; |
| ControllerMapping_t *pSupportedController = NULL; |
| |
| if ((device_index < 0) || (device_index >= SDL_NumJoysticks())) { |
| SDL_SetError("There are %d joysticks available", SDL_NumJoysticks()); |
| return (NULL); |
| } |
| |
| SDL_LockJoystickList(); |
| |
| gamecontrollerlist = SDL_gamecontrollers; |
| /* If the controller is already open, return it */ |
| while (gamecontrollerlist) { |
| if (SDL_SYS_GetInstanceIdOfDeviceIndex(device_index) == gamecontrollerlist->joystick->instance_id) { |
| gamecontroller = gamecontrollerlist; |
| ++gamecontroller->ref_count; |
| SDL_UnlockJoystickList(); |
| return (gamecontroller); |
| } |
| gamecontrollerlist = gamecontrollerlist->next; |
| } |
| |
| /* Find a controller mapping */ |
| pSupportedController = SDL_PrivateGetControllerMapping(device_index); |
| if (!pSupportedController) { |
| SDL_SetError("Couldn't find mapping for device (%d)", device_index); |
| SDL_UnlockJoystickList(); |
| return NULL; |
| } |
| |
| /* Create and initialize the controller */ |
| gamecontroller = (SDL_GameController *) SDL_calloc(1, sizeof(*gamecontroller)); |
| if (gamecontroller == NULL) { |
| SDL_OutOfMemory(); |
| SDL_UnlockJoystickList(); |
| return NULL; |
| } |
| |
| gamecontroller->joystick = SDL_JoystickOpen(device_index); |
| if (!gamecontroller->joystick) { |
| SDL_free(gamecontroller); |
| SDL_UnlockJoystickList(); |
| return NULL; |
| } |
| |
| if (gamecontroller->joystick->naxes) { |
| gamecontroller->last_match_axis = (SDL_ExtendedGameControllerBind **)SDL_calloc(gamecontroller->joystick->naxes, sizeof(*gamecontroller->last_match_axis)); |
| if (!gamecontroller->last_match_axis) { |
| SDL_OutOfMemory(); |
| SDL_JoystickClose(gamecontroller->joystick); |
| SDL_free(gamecontroller); |
| SDL_UnlockJoystickList(); |
| return NULL; |
| } |
| } |
| if (gamecontroller->joystick->nhats) { |
| gamecontroller->last_hat_mask = (Uint8 *)SDL_calloc(gamecontroller->joystick->nhats, sizeof(*gamecontroller->last_hat_mask)); |
| if (!gamecontroller->last_hat_mask) { |
| SDL_OutOfMemory(); |
| SDL_JoystickClose(gamecontroller->joystick); |
| SDL_free(gamecontroller->last_match_axis); |
| SDL_free(gamecontroller); |
| SDL_UnlockJoystickList(); |
| return NULL; |
| } |
| } |
| |
| SDL_PrivateLoadButtonMapping(gamecontroller, pSupportedController->guid, pSupportedController->name, pSupportedController->mapping); |
| |
| /* Add the controller to list */ |
| ++gamecontroller->ref_count; |
| /* Link the controller in the list */ |
| gamecontroller->next = SDL_gamecontrollers; |
| SDL_gamecontrollers = gamecontroller; |
| |
| SDL_UnlockJoystickList(); |
| |
| return (gamecontroller); |
| } |
| |
| /* |
| * Manually pump for controller updates. |
| */ |
| void |
| SDL_GameControllerUpdate(void) |
| { |
| /* Just for API completeness; the joystick API does all the work. */ |
| SDL_JoystickUpdate(); |
| } |
| |
| /* |
| * Get the current state of an axis control on a controller |
| */ |
| Sint16 |
| SDL_GameControllerGetAxis(SDL_GameController * gamecontroller, SDL_GameControllerAxis axis) |
| { |
| int i; |
| |
| if (!gamecontroller) |
| return 0; |
| |
| for (i = 0; i < gamecontroller->num_bindings; ++i) { |
| SDL_ExtendedGameControllerBind *binding = &gamecontroller->bindings[i]; |
| if (binding->outputType == SDL_CONTROLLER_BINDTYPE_AXIS && binding->output.axis.axis == axis) { |
| int value = 0; |
| SDL_bool valid_input_range; |
| SDL_bool valid_output_range; |
| |
| if (binding->inputType == SDL_CONTROLLER_BINDTYPE_AXIS) { |
| value = SDL_JoystickGetAxis(gamecontroller->joystick, binding->input.axis.axis); |
| if (binding->input.axis.axis_min < binding->input.axis.axis_max) { |
| valid_input_range = (value >= binding->input.axis.axis_min && value <= binding->input.axis.axis_max); |
| } else { |
| valid_input_range = (value >= binding->input.axis.axis_max && value <= binding->input.axis.axis_min); |
| } |
| if (valid_input_range) { |
| if (binding->input.axis.axis_min != binding->output.axis.axis_min || binding->input.axis.axis_max != binding->output.axis.axis_max) { |
| float normalized_value = (float)(value - binding->input.axis.axis_min) / (binding->input.axis.axis_max - binding->input.axis.axis_min); |
| value = binding->output.axis.axis_min + (int)(normalized_value * (binding->output.axis.axis_max - binding->output.axis.axis_min)); |
| } |
| } |
| } else if (binding->inputType == SDL_CONTROLLER_BINDTYPE_BUTTON) { |
| value = SDL_JoystickGetButton(gamecontroller->joystick, binding->input.button); |
| if (value == SDL_PRESSED) { |
| value = binding->output.axis.axis_max; |
| } |
| } else if (binding->inputType == SDL_CONTROLLER_BINDTYPE_HAT) { |
| int hat_mask = SDL_JoystickGetHat(gamecontroller->joystick, binding->input.hat.hat); |
| if (hat_mask & binding->input.hat.hat_mask) { |
| value = binding->output.axis.axis_max; |
| } |
| } |
| |
| if (binding->output.axis.axis_min < binding->output.axis.axis_max) { |
| valid_output_range = (value >= binding->output.axis.axis_min && value <= binding->output.axis.axis_max); |
| } else { |
| valid_output_range = (value >= binding->output.axis.axis_max && value <= binding->output.axis.axis_min); |
| } |
| /* If the value is zero, there might be another binding that makes it non-zero */ |
| if (value != 0 && valid_output_range) { |
| return (Sint16)value; |
| } |
| } |
| } |
| return 0; |
| } |
| |
| /* |
| * Get the current state of a button on a controller |
| */ |
| Uint8 |
| SDL_GameControllerGetButton(SDL_GameController * gamecontroller, SDL_GameControllerButton button) |
| { |
| int i; |
| |
| if (!gamecontroller) |
| return 0; |
| |
| for (i = 0; i < gamecontroller->num_bindings; ++i) { |
| SDL_ExtendedGameControllerBind *binding = &gamecontroller->bindings[i]; |
| if (binding->outputType == SDL_CONTROLLER_BINDTYPE_BUTTON && binding->output.button == button) { |
| if (binding->inputType == SDL_CONTROLLER_BINDTYPE_AXIS) { |
| SDL_bool valid_input_range; |
| |
| int value = SDL_JoystickGetAxis(gamecontroller->joystick, binding->input.axis.axis); |
| int threshold = binding->input.axis.axis_min + (binding->input.axis.axis_max - binding->input.axis.axis_min) / 2; |
| if (binding->input.axis.axis_min < binding->input.axis.axis_max) { |
| valid_input_range = (value >= binding->input.axis.axis_min && value <= binding->input.axis.axis_max); |
| if (valid_input_range) { |
| return (value >= threshold) ? SDL_PRESSED : SDL_RELEASED; |
| } |
| } else { |
| valid_input_range = (value >= binding->input.axis.axis_max && value <= binding->input.axis.axis_min); |
| if (valid_input_range) { |
| return (value <= threshold) ? SDL_PRESSED : SDL_RELEASED; |
| } |
| } |
| } else if (binding->inputType == SDL_CONTROLLER_BINDTYPE_BUTTON) { |
| return SDL_JoystickGetButton(gamecontroller->joystick, binding->input.button); |
| } else if (binding->inputType == SDL_CONTROLLER_BINDTYPE_HAT) { |
| int hat_mask = SDL_JoystickGetHat(gamecontroller->joystick, binding->input.hat.hat); |
| return (hat_mask & binding->input.hat.hat_mask) ? SDL_PRESSED : SDL_RELEASED; |
| } |
| } |
| } |
| return SDL_RELEASED; |
| } |
| |
| const char * |
| SDL_GameControllerName(SDL_GameController * gamecontroller) |
| { |
| if (!gamecontroller) |
| return NULL; |
| |
| return gamecontroller->name; |
| } |
| |
| Uint16 |
| SDL_GameControllerGetVendor(SDL_GameController * gamecontroller) |
| { |
| return SDL_JoystickGetVendor(SDL_GameControllerGetJoystick(gamecontroller)); |
| } |
| |
| Uint16 |
| SDL_GameControllerGetProduct(SDL_GameController * gamecontroller) |
| { |
| return SDL_JoystickGetProduct(SDL_GameControllerGetJoystick(gamecontroller)); |
| } |
| |
| Uint16 |
| SDL_GameControllerGetProductVersion(SDL_GameController * gamecontroller) |
| { |
| return SDL_JoystickGetProductVersion(SDL_GameControllerGetJoystick(gamecontroller)); |
| } |
| |
| /* |
| * Return if the controller in question is currently attached to the system, |
| * \return 0 if not plugged in, 1 if still present. |
| */ |
| SDL_bool |
| SDL_GameControllerGetAttached(SDL_GameController * gamecontroller) |
| { |
| if (!gamecontroller) |
| return SDL_FALSE; |
| |
| return SDL_JoystickGetAttached(gamecontroller->joystick); |
| } |
| |
| /* |
| * Get the joystick for this controller |
| */ |
| SDL_Joystick *SDL_GameControllerGetJoystick(SDL_GameController * gamecontroller) |
| { |
| if (!gamecontroller) |
| return NULL; |
| |
| return gamecontroller->joystick; |
| } |
| |
| |
| /* |
| * Find the SDL_GameController that owns this instance id |
| */ |
| SDL_GameController * |
| SDL_GameControllerFromInstanceID(SDL_JoystickID joyid) |
| { |
| SDL_GameController *gamecontroller; |
| |
| SDL_LockJoystickList(); |
| gamecontroller = SDL_gamecontrollers; |
| while (gamecontroller) { |
| if (gamecontroller->joystick->instance_id == joyid) { |
| SDL_UnlockJoystickList(); |
| return gamecontroller; |
| } |
| gamecontroller = gamecontroller->next; |
| } |
| SDL_UnlockJoystickList(); |
| return NULL; |
| } |
| |
| |
| /* |
| * Get the SDL joystick layer binding for this controller axis mapping |
| */ |
| SDL_GameControllerButtonBind SDL_GameControllerGetBindForAxis(SDL_GameController * gamecontroller, SDL_GameControllerAxis axis) |
| { |
| int i; |
| SDL_GameControllerButtonBind bind; |
| SDL_zero(bind); |
| |
| if (!gamecontroller || axis == SDL_CONTROLLER_AXIS_INVALID) |
| return bind; |
| |
| for (i = 0; i < gamecontroller->num_bindings; ++i) { |
| SDL_ExtendedGameControllerBind *binding = &gamecontroller->bindings[i]; |
| if (binding->outputType == SDL_CONTROLLER_BINDTYPE_AXIS && binding->output.axis.axis == axis) { |
| bind.bindType = binding->inputType; |
| if (binding->inputType == SDL_CONTROLLER_BINDTYPE_AXIS) { |
| /* FIXME: There might be multiple axes bound now that we have axis ranges... */ |
| bind.value.axis = binding->input.axis.axis; |
| } else if (binding->inputType == SDL_CONTROLLER_BINDTYPE_BUTTON) { |
| bind.value.button = binding->input.button; |
| } else if (binding->inputType == SDL_CONTROLLER_BINDTYPE_HAT) { |
| bind.value.hat.hat = binding->input.hat.hat; |
| bind.value.hat.hat_mask = binding->input.hat.hat_mask; |
| } |
| break; |
| } |
| } |
| return bind; |
| } |
| |
| |
| /* |
| * Get the SDL joystick layer binding for this controller button mapping |
| */ |
| SDL_GameControllerButtonBind SDL_GameControllerGetBindForButton(SDL_GameController * gamecontroller, SDL_GameControllerButton button) |
| { |
| int i; |
| SDL_GameControllerButtonBind bind; |
| SDL_zero(bind); |
| |
| if (!gamecontroller || button == SDL_CONTROLLER_BUTTON_INVALID) |
| return bind; |
| |
| for (i = 0; i < gamecontroller->num_bindings; ++i) { |
| SDL_ExtendedGameControllerBind *binding = &gamecontroller->bindings[i]; |
| if (binding->outputType == SDL_CONTROLLER_BINDTYPE_BUTTON && binding->output.button == button) { |
| bind.bindType = binding->inputType; |
| if (binding->inputType == SDL_CONTROLLER_BINDTYPE_AXIS) { |
| bind.value.axis = binding->input.axis.axis; |
| } else if (binding->inputType == SDL_CONTROLLER_BINDTYPE_BUTTON) { |
| bind.value.button = binding->input.button; |
| } else if (binding->inputType == SDL_CONTROLLER_BINDTYPE_HAT) { |
| bind.value.hat.hat = binding->input.hat.hat; |
| bind.value.hat.hat_mask = binding->input.hat.hat_mask; |
| } |
| break; |
| } |
| } |
| return bind; |
| } |
| |
| |
| void |
| SDL_GameControllerClose(SDL_GameController * gamecontroller) |
| { |
| SDL_GameController *gamecontrollerlist, *gamecontrollerlistprev; |
| |
| if (!gamecontroller) |
| return; |
| |
| SDL_LockJoystickList(); |
| |
| /* First decrement ref count */ |
| if (--gamecontroller->ref_count > 0) { |
| SDL_UnlockJoystickList(); |
| return; |
| } |
| |
| SDL_JoystickClose(gamecontroller->joystick); |
| |
| gamecontrollerlist = SDL_gamecontrollers; |
| gamecontrollerlistprev = NULL; |
| while (gamecontrollerlist) { |
| if (gamecontroller == gamecontrollerlist) { |
| if (gamecontrollerlistprev) { |
| /* unlink this entry */ |
| gamecontrollerlistprev->next = gamecontrollerlist->next; |
| } else { |
| SDL_gamecontrollers = gamecontroller->next; |
| } |
| break; |
| } |
| gamecontrollerlistprev = gamecontrollerlist; |
| gamecontrollerlist = gamecontrollerlist->next; |
| } |
| |
| SDL_free(gamecontroller->bindings); |
| SDL_free(gamecontroller->last_match_axis); |
| SDL_free(gamecontroller->last_hat_mask); |
| SDL_free(gamecontroller); |
| |
| SDL_UnlockJoystickList(); |
| } |
| |
| |
| /* |
| * Quit the controller subsystem |
| */ |
| void |
| SDL_GameControllerQuit(void) |
| { |
| SDL_LockJoystickList(); |
| while (SDL_gamecontrollers) { |
| SDL_gamecontrollers->ref_count = 1; |
| SDL_GameControllerClose(SDL_gamecontrollers); |
| } |
| SDL_UnlockJoystickList(); |
| } |
| |
| void |
| SDL_GameControllerQuitMappings(void) |
| { |
| ControllerMapping_t *pControllerMap; |
| |
| while (s_pSupportedControllers) { |
| pControllerMap = s_pSupportedControllers; |
| s_pSupportedControllers = s_pSupportedControllers->next; |
| SDL_free(pControllerMap->name); |
| SDL_free(pControllerMap->mapping); |
| SDL_free(pControllerMap); |
| } |
| |
| SDL_DelEventWatch(SDL_GameControllerEventWatcher, NULL); |
| |
| SDL_DelHintCallback(SDL_HINT_GAMECONTROLLER_IGNORE_DEVICES, |
| SDL_GameControllerIgnoreDevicesChanged, NULL); |
| SDL_DelHintCallback(SDL_HINT_GAMECONTROLLER_IGNORE_DEVICES_EXCEPT, |
| SDL_GameControllerIgnoreDevicesExceptChanged, NULL); |
| |
| if (SDL_allowed_controllers.entries) { |
| SDL_free(SDL_allowed_controllers.entries); |
| SDL_zero(SDL_allowed_controllers); |
| } |
| if (SDL_ignored_controllers.entries) { |
| SDL_free(SDL_ignored_controllers.entries); |
| SDL_zero(SDL_ignored_controllers); |
| } |
| } |
| |
| /* |
| * Event filter to transform joystick events into appropriate game controller ones |
| */ |
| static int |
| SDL_PrivateGameControllerAxis(SDL_GameController * gamecontroller, SDL_GameControllerAxis axis, Sint16 value) |
| { |
| int posted; |
| |
| /* translate the event, if desired */ |
| posted = 0; |
| #if !SDL_EVENTS_DISABLED |
| if (SDL_GetEventState(SDL_CONTROLLERAXISMOTION) == SDL_ENABLE) { |
| SDL_Event event; |
| event.type = SDL_CONTROLLERAXISMOTION; |
| event.caxis.which = gamecontroller->joystick->instance_id; |
| event.caxis.axis = axis; |
| event.caxis.value = value; |
| posted = SDL_PushEvent(&event) == 1; |
| } |
| #endif /* !SDL_EVENTS_DISABLED */ |
| return (posted); |
| } |
| |
| |
| /* |
| * Event filter to transform joystick events into appropriate game controller ones |
| */ |
| static int |
| SDL_PrivateGameControllerButton(SDL_GameController * gamecontroller, SDL_GameControllerButton button, Uint8 state) |
| { |
| int posted; |
| #if !SDL_EVENTS_DISABLED |
| SDL_Event event; |
| |
| if (button == SDL_CONTROLLER_BUTTON_INVALID) |
| return (0); |
| |
| switch (state) { |
| case SDL_PRESSED: |
| event.type = SDL_CONTROLLERBUTTONDOWN; |
| break; |
| case SDL_RELEASED: |
| event.type = SDL_CONTROLLERBUTTONUP; |
| break; |
| default: |
| /* Invalid state -- bail */ |
| return (0); |
| } |
| #endif /* !SDL_EVENTS_DISABLED */ |
| |
| /* translate the event, if desired */ |
| posted = 0; |
| #if !SDL_EVENTS_DISABLED |
| if (SDL_GetEventState(event.type) == SDL_ENABLE) { |
| event.cbutton.which = gamecontroller->joystick->instance_id; |
| event.cbutton.button = button; |
| event.cbutton.state = state; |
| posted = SDL_PushEvent(&event) == 1; |
| } |
| #endif /* !SDL_EVENTS_DISABLED */ |
| return (posted); |
| } |
| |
| /* |
| * Turn off controller events |
| */ |
| int |
| SDL_GameControllerEventState(int state) |
| { |
| #if SDL_EVENTS_DISABLED |
| return SDL_IGNORE; |
| #else |
| const Uint32 event_list[] = { |
| SDL_CONTROLLERAXISMOTION, SDL_CONTROLLERBUTTONDOWN, SDL_CONTROLLERBUTTONUP, |
| SDL_CONTROLLERDEVICEADDED, SDL_CONTROLLERDEVICEREMOVED, SDL_CONTROLLERDEVICEREMAPPED, |
| }; |
| unsigned int i; |
| |
| switch (state) { |
| case SDL_QUERY: |
| state = SDL_IGNORE; |
| for (i = 0; i < SDL_arraysize(event_list); ++i) { |
| state = SDL_EventState(event_list[i], SDL_QUERY); |
| if (state == SDL_ENABLE) { |
| break; |
| } |
| } |
| break; |
| default: |
| for (i = 0; i < SDL_arraysize(event_list); ++i) { |
| SDL_EventState(event_list[i], state); |
| } |
| break; |
| } |
| return (state); |
| #endif /* SDL_EVENTS_DISABLED */ |
| } |
| |
| /* vi: set ts=4 sw=4 expandtab: */ |
