Open and test all connected controllers

This commit is contained in:
Sam Lantinga 2020-11-27 18:57:38 -08:00
parent 1c865c460b
commit 012471e959

View File

@ -68,6 +68,141 @@ SDL_bool done = SDL_FALSE;
SDL_bool set_LED = SDL_FALSE;
SDL_Texture *background_front, *background_back, *button, *axis;
SDL_GameController *gamecontroller;
SDL_GameController **gamecontrollers;
int num_controllers = 0;
static void UpdateWindowTitle()
{
if (!window) {
return;
}
if (gamecontroller) {
const char *name = SDL_GameControllerName(gamecontroller);
const char *serial = SDL_GameControllerGetSerial(gamecontroller);
const char *basetitle = "Game Controller Test: ";
const size_t titlelen = SDL_strlen(basetitle) + SDL_strlen(name) + (serial ? 3 + SDL_strlen(serial) : 0) + 1;
char *title = (char *)SDL_malloc(titlelen);
retval = SDL_FALSE;
done = SDL_FALSE;
if (title) {
SDL_snprintf(title, titlelen, "%s%s", basetitle, name);
if (serial) {
SDL_strlcat(title, " (", titlelen);
SDL_strlcat(title, serial, titlelen);
SDL_strlcat(title, ")", titlelen);
}
SDL_SetWindowTitle(window, title);
SDL_free(title);
}
} else {
SDL_SetWindowTitle(window, "Waiting for controller...");
}
}
static int FindController(SDL_JoystickID controller_id)
{
int i;
for (i = 0; i < num_controllers; ++i) {
if (controller_id == SDL_JoystickInstanceID(SDL_GameControllerGetJoystick(gamecontrollers[i]))) {
return i;
}
}
return -1;
}
static void AddController(int device_index, SDL_bool verbose)
{
SDL_JoystickID controller_id = SDL_JoystickGetDeviceInstanceID(device_index);
SDL_GameController *controller;
SDL_GameController **controllers;
controller_id = SDL_JoystickGetDeviceInstanceID(device_index);
if (controller_id < 0) {
SDL_Log("Couldn't get controller ID: %s\n", SDL_GetError());
return;
}
if (FindController(controller_id) >= 0) {
/* We already have this controller */
return;
}
controller = SDL_GameControllerOpen(device_index);
if (!controller) {
SDL_Log("Couldn't open controller: %s\n", SDL_GetError());
return;
}
controllers = (SDL_GameController **)SDL_realloc(gamecontrollers, (num_controllers + 1) * sizeof(*controllers));
if (!controllers) {
SDL_GameControllerClose(controller);
return;
}
controllers[num_controllers++] = controller;
gamecontrollers = controllers;
gamecontroller = controller;
if (verbose) {
const char *name = SDL_GameControllerName(gamecontroller);
SDL_Log("Opened game controller %s\n", name);
}
if (SDL_GameControllerHasSensor(gamecontroller, SDL_SENSOR_ACCEL)) {
if (verbose) {
SDL_Log("Enabling accelerometer\n");
}
SDL_GameControllerSetSensorEnabled(gamecontroller, SDL_SENSOR_ACCEL, SDL_TRUE);
}
if (SDL_GameControllerHasSensor(gamecontroller, SDL_SENSOR_GYRO)) {
if (verbose) {
SDL_Log("Enabling gyro\n");
}
SDL_GameControllerSetSensorEnabled(gamecontroller, SDL_SENSOR_GYRO, SDL_TRUE);
}
UpdateWindowTitle();
}
static void SetController(SDL_JoystickID controller)
{
int i = FindController(controller);
if (i < 0) {
return;
}
if (gamecontroller != gamecontrollers[i]) {
gamecontroller = gamecontrollers[i];
UpdateWindowTitle();
}
}
static void DelController(SDL_JoystickID controller)
{
int i = FindController(controller);
if (i < 0) {
return;
}
--num_controllers;
if (i < num_controllers) {
SDL_memcpy(&gamecontrollers[i], &gamecontrollers[i+1], (num_controllers - i) * sizeof(*gamecontrollers));
}
if (num_controllers > 0) {
gamecontroller = gamecontrollers[0];
} else {
gamecontroller = NULL;
}
UpdateWindowTitle();
}
static SDL_Texture *
LoadTexture(SDL_Renderer *renderer, const char *file, SDL_bool transparent)
@ -97,52 +232,6 @@ LoadTexture(SDL_Renderer *renderer, const char *file, SDL_bool transparent)
return texture;
}
static void
InitGameController()
{
const char *name = SDL_GameControllerName(gamecontroller);
SDL_Log("Opened game controller %s\n", name);
if (SDL_GameControllerHasSensor(gamecontroller, SDL_SENSOR_ACCEL)) {
SDL_Log("Enabling accelerometer\n");
SDL_GameControllerSetSensorEnabled(gamecontroller, SDL_SENSOR_ACCEL, SDL_TRUE);
}
if (SDL_GameControllerHasSensor(gamecontroller, SDL_SENSOR_GYRO)) {
SDL_Log("Enabling gyro\n");
SDL_GameControllerSetSensorEnabled(gamecontroller, SDL_SENSOR_GYRO, SDL_TRUE);
}
}
static void
UpdateWindowTitle()
{
if (gamecontroller) {
const char *name = SDL_GameControllerName(gamecontroller);
const char *serial = SDL_GameControllerGetSerial(gamecontroller);
const char *basetitle = "Game Controller Test: ";
const size_t titlelen = SDL_strlen(basetitle) + SDL_strlen(name) + (serial ? 3 + SDL_strlen(serial) : 0) + 1;
char *title = (char *)SDL_malloc(titlelen);
retval = SDL_FALSE;
done = SDL_FALSE;
if (title) {
SDL_snprintf(title, titlelen, "%s%s", basetitle, name);
if (serial) {
SDL_strlcat(title, " (", titlelen);
SDL_strlcat(title, serial, titlelen);
SDL_strlcat(title, ")", titlelen);
}
SDL_SetWindowTitle(window, title);
SDL_free(title);
}
} else {
SDL_SetWindowTitle(window, "Waiting for controller...");
}
}
static Uint16 ConvertAxisToRumble(Sint16 axis)
{
/* Only start rumbling if the axis is past the halfway point */
@ -164,30 +253,13 @@ loop(void *arg)
while (SDL_PollEvent(&event)) {
switch (event.type) {
case SDL_CONTROLLERDEVICEADDED:
SDL_Log("Game controller device %d added.\n", (int) event.cdevice.which);
if (gamecontroller) {
SDL_GameControllerClose(gamecontroller);
}
gamecontroller = SDL_GameControllerOpen(event.cdevice.which);
if (gamecontroller) {
InitGameController();
} else {
SDL_Log("Couldn't open controller: %s\n", SDL_GetError());
}
UpdateWindowTitle();
SDL_Log("Game controller device %d added.\n", (int) SDL_JoystickGetDeviceInstanceID(event.cdevice.which));
AddController(event.cdevice.which, SDL_TRUE);
break;
case SDL_CONTROLLERDEVICEREMOVED:
SDL_Log("Game controller device %d removed.\n", (int) event.cdevice.which);
if (gamecontroller && event.cdevice.which == SDL_JoystickInstanceID(SDL_GameControllerGetJoystick(gamecontroller))) {
SDL_GameControllerClose(gamecontroller);
gamecontroller = SDL_GameControllerOpen(0);
if (gamecontroller) {
InitGameController();
}
UpdateWindowTitle();
}
DelController(event.cdevice.which);
break;
case SDL_CONTROLLERTOUCHPADDOWN:
@ -214,11 +286,17 @@ loop(void *arg)
break;
case SDL_CONTROLLERAXISMOTION:
if (event.caxis.value <= (-SDL_JOYSTICK_AXIS_MAX / 2) || event.caxis.value >= (SDL_JOYSTICK_AXIS_MAX / 2)) {
SetController(event.caxis.which);
}
SDL_Log("Controller axis %s changed to %d\n", SDL_GameControllerGetStringForAxis((SDL_GameControllerAxis)event.caxis.axis), event.caxis.value);
break;
case SDL_CONTROLLERBUTTONDOWN:
case SDL_CONTROLLERBUTTONUP:
if (event.type == SDL_CONTROLLERBUTTONDOWN) {
SetController(event.cbutton.which);
}
SDL_Log("Controller button %s %s\n", SDL_GameControllerGetStringForButton((SDL_GameControllerButton)event.cbutton.button), event.cbutton.state ? "pressed" : "released");
break;
@ -339,7 +417,8 @@ int
main(int argc, char *argv[])
{
int i;
int nController = 0;
int controller_count = 0;
int controller_index = 0;
char guid[64];
SDL_SetHint(SDL_HINT_ACCELEROMETER_AS_JOYSTICK, "0");
@ -377,8 +456,8 @@ main(int argc, char *argv[])
SDL_JoystickGetGUIDString(SDL_JoystickGetDeviceGUID(i),
guid, sizeof (guid));
if ( SDL_IsGameController(i) ) {
nController++;
if (SDL_IsGameController(i)) {
controller_count++;
name = SDL_GameControllerNameForIndex(i);
switch (SDL_GameControllerTypeForIndex(i)) {
case SDL_CONTROLLER_TYPE_XBOX360:
@ -403,6 +482,7 @@ main(int argc, char *argv[])
description = "Game Controller";
break;
}
AddController(i, SDL_FALSE);
} else {
name = SDL_JoystickNameForIndex(i);
description = "Joystick";
@ -411,7 +491,7 @@ main(int argc, char *argv[])
description, i, name ? name : "Unknown", guid,
SDL_JoystickGetDeviceVendor(i), SDL_JoystickGetDeviceProduct(i), SDL_JoystickGetDevicePlayerIndex(i));
}
SDL_Log("There are %d game controller(s) attached (%d joystick(s))\n", nController, SDL_NumJoysticks());
SDL_Log("There are %d game controller(s) attached (%d joystick(s))\n", controller_count, SDL_NumJoysticks());
/* Create a window to display controller state */
window = SDL_CreateWindow("Game Controller Test", SDL_WINDOWPOS_CENTERED,
@ -453,9 +533,13 @@ main(int argc, char *argv[])
/*SDL_RenderSetLogicalSize(screen, background->w, background->h);*/
if (argv[1] && *argv[1] != '-') {
gamecontroller = SDL_GameControllerOpen(SDL_atoi(argv[1]));
controller_index = SDL_atoi(argv[1]);
}
if (controller_index < num_controllers) {
gamecontroller = gamecontrollers[controller_index];
} else {
gamecontroller = NULL;
}
UpdateWindowTitle();
/* Loop, getting controller events! */