SDL/test/testgamecontroller.c

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/*
2022-01-03 10:40:00 -07:00
Copyright (C) 1997-2022 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.
*/
/* Simple program to test the SDL game controller routines */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "SDL.h"
#include "testutils.h"
#ifdef __EMSCRIPTEN__
#include <emscripten/emscripten.h>
#endif
#ifndef SDL_JOYSTICK_DISABLED
#define SCREEN_WIDTH 512
2016-10-13 05:01:25 -06:00
#define SCREEN_HEIGHT 320
#define BUTTON_SIZE 50
#define AXIS_SIZE 50
/* This is indexed by SDL_GameControllerButton. */
static const struct { int x; int y; } button_positions[] = {
{387, 167}, /* SDL_CONTROLLER_BUTTON_A */
{431, 132}, /* SDL_CONTROLLER_BUTTON_B */
{342, 132}, /* SDL_CONTROLLER_BUTTON_X */
{389, 101}, /* SDL_CONTROLLER_BUTTON_Y */
{174, 132}, /* SDL_CONTROLLER_BUTTON_BACK */
{232, 128}, /* SDL_CONTROLLER_BUTTON_GUIDE */
{289, 132}, /* SDL_CONTROLLER_BUTTON_START */
{75, 154}, /* SDL_CONTROLLER_BUTTON_LEFTSTICK */
{305, 230}, /* SDL_CONTROLLER_BUTTON_RIGHTSTICK */
{77, 40}, /* SDL_CONTROLLER_BUTTON_LEFTSHOULDER */
{396, 36}, /* SDL_CONTROLLER_BUTTON_RIGHTSHOULDER */
{154, 188}, /* SDL_CONTROLLER_BUTTON_DPAD_UP */
{154, 249}, /* SDL_CONTROLLER_BUTTON_DPAD_DOWN */
{116, 217}, /* SDL_CONTROLLER_BUTTON_DPAD_LEFT */
{186, 217}, /* SDL_CONTROLLER_BUTTON_DPAD_RIGHT */
{232, 174}, /* SDL_CONTROLLER_BUTTON_MISC1 */
{132, 135}, /* SDL_CONTROLLER_BUTTON_PADDLE1 */
{330, 135}, /* SDL_CONTROLLER_BUTTON_PADDLE2 */
{132, 175}, /* SDL_CONTROLLER_BUTTON_PADDLE3 */
{330, 175}, /* SDL_CONTROLLER_BUTTON_PADDLE4 */
{0, 0}, /* SDL_CONTROLLER_BUTTON_TOUCHPAD */
};
SDL_COMPILE_TIME_ASSERT(button_positions, SDL_arraysize(button_positions) == SDL_CONTROLLER_BUTTON_MAX);
/* This is indexed by SDL_GameControllerAxis. */
static const struct { int x; int y; double angle; } axis_positions[] = {
{74, 153, 270.0}, /* LEFTX */
{74, 153, 0.0}, /* LEFTY */
{306, 231, 270.0}, /* RIGHTX */
{306, 231, 0.0}, /* RIGHTY */
{91, -20, 0.0}, /* TRIGGERLEFT */
{375, -20, 0.0}, /* TRIGGERRIGHT */
};
SDL_COMPILE_TIME_ASSERT(axis_positions, SDL_arraysize(axis_positions) == SDL_CONTROLLER_AXIS_MAX);
/* This is indexed by SDL_JoystickPowerLevel + 1. */
static const char* power_level_strings[] = {
"unknown", /* SDL_JOYSTICK_POWER_UNKNOWN */
"empty", /* SDL_JOYSTICK_POWER_EMPTY */
"low", /* SDL_JOYSTICK_POWER_LOW */
"medium", /* SDL_JOYSTICK_POWER_MEDIUM */
"full", /* SDL_JOYSTICK_POWER_FULL */
"wired", /* SDL_JOYSTICK_POWER_WIRED */
};
SDL_COMPILE_TIME_ASSERT(power_level_strings, SDL_arraysize(power_level_strings) == SDL_JOYSTICK_POWER_MAX + 1);
static SDL_Window *window = NULL;
static SDL_Renderer *screen = NULL;
static SDL_bool retval = SDL_FALSE;
static SDL_bool done = SDL_FALSE;
static SDL_bool set_LED = SDL_FALSE;
static int trigger_effect = 0;
static SDL_Texture *background_front, *background_back, *button_texture, *axis_texture;
static SDL_GameController *gamecontroller;
static SDL_GameController **gamecontrollers;
static int num_controllers = 0;
static SDL_Joystick *virtual_joystick = NULL;
static SDL_GameControllerAxis virtual_axis_active = SDL_CONTROLLER_AXIS_INVALID;
static int virtual_axis_start_x;
static int virtual_axis_start_y;
static SDL_GameControllerButton virtual_button_active = SDL_CONTROLLER_BUTTON_INVALID;
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) + (name ? SDL_strlen(name) : 0) + (serial ? 3 + SDL_strlen(serial) : 0) + 1;
char *title = (char *)SDL_malloc(titlelen);
retval = SDL_FALSE;
done = SDL_FALSE;
if (title) {
SDL_strlcpy(title, basetitle, titlelen);
if (name) {
SDL_strlcat(title, name, titlelen);
}
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 const char *GetSensorName(SDL_SensorType sensor)
{
switch (sensor) {
case SDL_SENSOR_ACCEL:
return "accelerometer";
case SDL_SENSOR_GYRO:
return "gyro";
case SDL_SENSOR_ACCEL_L:
return "accelerometer (L)";
case SDL_SENSOR_GYRO_L:
return "gyro (L)";
case SDL_SENSOR_ACCEL_R:
return "accelerometer (R)";
case SDL_SENSOR_GYRO_R:
return "gyro (R)";
default:
return "UNKNOWN";
}
}
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;
Uint16 firmware_version;
SDL_SensorType sensors[] = {
SDL_SENSOR_ACCEL,
SDL_SENSOR_GYRO,
SDL_SENSOR_ACCEL_L,
SDL_SENSOR_GYRO_L,
SDL_SENSOR_ACCEL_R,
SDL_SENSOR_GYRO_R
};
unsigned int i;
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;
trigger_effect = 0;
if (verbose) {
const char *name = SDL_GameControllerName(gamecontroller);
const char *path = SDL_GameControllerPath(gamecontroller);
SDL_Log("Opened game controller %s%s%s\n", name, path ? ", " : "", path ? path : "");
}
firmware_version = SDL_GameControllerGetFirmwareVersion(gamecontroller);
if (firmware_version) {
if (verbose) {
SDL_Log("Firmware version: 0x%x (%d)\n", firmware_version, firmware_version);
}
}
for (i = 0; i < SDL_arraysize(sensors); ++i) {
SDL_SensorType sensor = sensors[i];
if (SDL_GameControllerHasSensor(gamecontroller, sensor)) {
if (verbose) {
SDL_Log("Enabling %s at %.2f Hz\n", GetSensorName(sensor), SDL_GameControllerGetSensorDataRate(gamecontroller, sensor));
}
SDL_GameControllerSetSensorEnabled(gamecontroller, sensor, SDL_TRUE);
}
}
if (SDL_GameControllerHasRumble(gamecontroller)) {
SDL_Log("Rumble supported");
}
if (SDL_GameControllerHasRumbleTriggers(gamecontroller)) {
SDL_Log("Trigger rumble supported");
}
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;
}
SDL_GameControllerClose(gamecontrollers[i]);
--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 Uint16 ConvertAxisToRumble(Sint16 axisval)
{
/* Only start rumbling if the axis is past the halfway point */
const Sint16 half_axis = (Sint16)SDL_ceil(SDL_JOYSTICK_AXIS_MAX / 2.0f);
if (axisval > half_axis) {
return (Uint16)(axisval - half_axis) * 4;
} else {
return 0;
}
}
/* PS5 trigger effect documentation:
https://controllers.fandom.com/wiki/Sony_DualSense#FFB_Trigger_Modes
*/
typedef struct
{
Uint8 ucEnableBits1; /* 0 */
Uint8 ucEnableBits2; /* 1 */
Uint8 ucRumbleRight; /* 2 */
Uint8 ucRumbleLeft; /* 3 */
Uint8 ucHeadphoneVolume; /* 4 */
Uint8 ucSpeakerVolume; /* 5 */
Uint8 ucMicrophoneVolume; /* 6 */
Uint8 ucAudioEnableBits; /* 7 */
Uint8 ucMicLightMode; /* 8 */
Uint8 ucAudioMuteBits; /* 9 */
Uint8 rgucRightTriggerEffect[11]; /* 10 */
Uint8 rgucLeftTriggerEffect[11]; /* 21 */
Uint8 rgucUnknown1[6]; /* 32 */
Uint8 ucLedFlags; /* 38 */
Uint8 rgucUnknown2[2]; /* 39 */
Uint8 ucLedAnim; /* 41 */
Uint8 ucLedBrightness; /* 42 */
Uint8 ucPadLights; /* 43 */
Uint8 ucLedRed; /* 44 */
Uint8 ucLedGreen; /* 45 */
Uint8 ucLedBlue; /* 46 */
} DS5EffectsState_t;
static void CyclePS5TriggerEffect()
{
DS5EffectsState_t state;
Uint8 effects[3][11] =
{
/* Clear trigger effect */
{ 0x05, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
/* Constant resistance across entire trigger pull */
{ 0x01, 0, 110, 0, 0, 0, 0, 0, 0, 0, 0 },
/* Resistance and vibration when trigger is pulled */
{ 0x06, 15, 63, 128, 0, 0, 0, 0, 0, 0, 0 },
};
trigger_effect = (trigger_effect + 1) % SDL_arraysize(effects);
SDL_zero(state);
state.ucEnableBits1 |= (0x04 | 0x08); /* Modify right and left trigger effect respectively */
SDL_memcpy(state.rgucRightTriggerEffect, effects[trigger_effect], sizeof(effects[trigger_effect]));
SDL_memcpy(state.rgucLeftTriggerEffect, effects[trigger_effect], sizeof(effects[trigger_effect]));
SDL_GameControllerSendEffect(gamecontroller, &state, sizeof(state));
}
static SDL_bool ShowingFront()
{
SDL_bool showing_front = SDL_TRUE;
int i;
if (gamecontroller) {
/* Show the back of the controller if the paddles are being held */
for (i = SDL_CONTROLLER_BUTTON_PADDLE1; i <= SDL_CONTROLLER_BUTTON_PADDLE4; ++i) {
if (SDL_GameControllerGetButton(gamecontroller, (SDL_GameControllerButton)i) == SDL_PRESSED) {
showing_front = SDL_FALSE;
break;
}
}
}
if ((SDL_GetModState() & KMOD_SHIFT) != 0) {
showing_front = SDL_FALSE;
}
return showing_front;
}
static void SDLCALL VirtualControllerSetPlayerIndex(void *userdata, int player_index)
{
SDL_Log("Virtual Controller: player index set to %d\n", player_index);
}
static int SDLCALL VirtualControllerRumble(void *userdata, Uint16 low_frequency_rumble, Uint16 high_frequency_rumble)
{
SDL_Log("Virtual Controller: rumble set to %d/%d\n", low_frequency_rumble, high_frequency_rumble);
return 0;
}
static int SDLCALL VirtualControllerRumbleTriggers(void *userdata, Uint16 left_rumble, Uint16 right_rumble)
{
SDL_Log("Virtual Controller: trigger rumble set to %d/%d\n", left_rumble, right_rumble);
return 0;
}
static int SDLCALL VirtualControllerSetLED(void *userdata, Uint8 red, Uint8 green, Uint8 blue)
{
SDL_Log("Virtual Controller: LED set to RGB %d,%d,%d\n", red, green, blue);
return 0;
}
static void OpenVirtualController()
{
SDL_VirtualJoystickDesc desc;
int virtual_index;
SDL_zero(desc);
desc.version = SDL_VIRTUAL_JOYSTICK_DESC_VERSION;
desc.type = SDL_JOYSTICK_TYPE_GAMECONTROLLER;
desc.naxes = SDL_CONTROLLER_AXIS_MAX;
desc.nbuttons = SDL_CONTROLLER_BUTTON_MAX;
desc.SetPlayerIndex = VirtualControllerSetPlayerIndex;
desc.Rumble = VirtualControllerRumble;
desc.RumbleTriggers = VirtualControllerRumbleTriggers;
desc.SetLED = VirtualControllerSetLED;
virtual_index = SDL_JoystickAttachVirtualEx(&desc);
if (virtual_index < 0) {
SDL_Log("Couldn't open virtual device: %s\n", SDL_GetError());
} else {
virtual_joystick = SDL_JoystickOpen(virtual_index);
if (!virtual_joystick) {
SDL_Log("Couldn't open virtual device: %s\n", SDL_GetError());
}
}
}
static void CloseVirtualController()
{
int i;
for (i = SDL_NumJoysticks(); i--; ) {
if (SDL_JoystickIsVirtual(i)) {
SDL_JoystickDetachVirtual(i);
}
}
if (virtual_joystick) {
SDL_JoystickClose(virtual_joystick);
virtual_joystick = NULL;
}
}
static SDL_GameControllerButton FindButtonAtPosition(int x, int y)
{
SDL_Point point;
int i;
SDL_bool showing_front = ShowingFront();
point.x = x;
point.y = y;
for (i = 0; i < SDL_CONTROLLER_BUTTON_TOUCHPAD; ++i) {
SDL_bool on_front = (i < SDL_CONTROLLER_BUTTON_PADDLE1 || i > SDL_CONTROLLER_BUTTON_PADDLE4);
if (on_front == showing_front) {
SDL_Rect rect;
rect.x = button_positions[i].x;
rect.y = button_positions[i].y;
rect.w = BUTTON_SIZE;
rect.h = BUTTON_SIZE;
if (SDL_PointInRect(&point, &rect)) {
return (SDL_GameControllerButton)i;
}
}
}
return SDL_CONTROLLER_BUTTON_INVALID;
}
static SDL_GameControllerAxis FindAxisAtPosition(int x, int y)
{
SDL_Point point;
int i;
SDL_bool showing_front = ShowingFront();
point.x = x;
point.y = y;
for (i = 0; i < SDL_CONTROLLER_AXIS_MAX; ++i) {
if (showing_front) {
SDL_Rect rect;
rect.x = axis_positions[i].x;
rect.y = axis_positions[i].y;
rect.w = AXIS_SIZE;
rect.h = AXIS_SIZE;
if (SDL_PointInRect(&point, &rect)) {
return (SDL_GameControllerAxis)i;
}
}
}
return SDL_CONTROLLER_AXIS_INVALID;
}
static void VirtualControllerMouseMotion(int x, int y)
{
if (virtual_button_active != SDL_CONTROLLER_BUTTON_INVALID) {
if (virtual_axis_active != SDL_CONTROLLER_AXIS_INVALID) {
const int MOVING_DISTANCE = 2;
if (SDL_abs(x - virtual_axis_start_x) >= MOVING_DISTANCE ||
SDL_abs(y - virtual_axis_start_y) >= MOVING_DISTANCE) {
SDL_JoystickSetVirtualButton(virtual_joystick, virtual_button_active, SDL_RELEASED);
virtual_button_active = SDL_CONTROLLER_BUTTON_INVALID;
}
}
}
if (virtual_axis_active != SDL_CONTROLLER_AXIS_INVALID) {
if (virtual_axis_active == SDL_CONTROLLER_AXIS_TRIGGERLEFT ||
virtual_axis_active == SDL_CONTROLLER_AXIS_TRIGGERRIGHT) {
int range = (SDL_JOYSTICK_AXIS_MAX - SDL_JOYSTICK_AXIS_MIN);
float distance = SDL_clamp(((float)y - virtual_axis_start_y) / AXIS_SIZE, 0.0f, 1.0f);
Sint16 value = (Sint16)(SDL_JOYSTICK_AXIS_MIN + (distance * range));
SDL_JoystickSetVirtualAxis(virtual_joystick, virtual_axis_active, value);
} else {
float distanceX = SDL_clamp(((float)x - virtual_axis_start_x) / AXIS_SIZE, -1.0f, 1.0f);
float distanceY = SDL_clamp(((float)y - virtual_axis_start_y) / AXIS_SIZE, -1.0f, 1.0f);
Sint16 valueX, valueY;
if (distanceX >= 0) {
valueX = (Sint16)(distanceX * SDL_JOYSTICK_AXIS_MAX);
} else {
valueX = (Sint16)(distanceX * -SDL_JOYSTICK_AXIS_MIN);
}
if (distanceY >= 0) {
valueY = (Sint16)(distanceY * SDL_JOYSTICK_AXIS_MAX);
} else {
valueY = (Sint16)(distanceY * -SDL_JOYSTICK_AXIS_MIN);
}
SDL_JoystickSetVirtualAxis(virtual_joystick, virtual_axis_active, valueX);
SDL_JoystickSetVirtualAxis(virtual_joystick, virtual_axis_active+1, valueY);
}
}
}
static void VirtualControllerMouseDown(int x, int y)
{
SDL_GameControllerButton button;
SDL_GameControllerAxis axis;
button = FindButtonAtPosition(x, y);
if (button != SDL_CONTROLLER_BUTTON_INVALID) {
virtual_button_active = button;
SDL_JoystickSetVirtualButton(virtual_joystick, virtual_button_active, SDL_PRESSED);
}
axis = FindAxisAtPosition(x, y);
if (axis != SDL_CONTROLLER_AXIS_INVALID) {
virtual_axis_active = axis;
virtual_axis_start_x = x;
virtual_axis_start_y = y;
}
}
static void VirtualControllerMouseUp(int x, int y)
{
if (virtual_button_active != SDL_CONTROLLER_BUTTON_INVALID) {
SDL_JoystickSetVirtualButton(virtual_joystick, virtual_button_active, SDL_RELEASED);
virtual_button_active = SDL_CONTROLLER_BUTTON_INVALID;
}
if (virtual_axis_active != SDL_CONTROLLER_AXIS_INVALID) {
if (virtual_axis_active == SDL_CONTROLLER_AXIS_TRIGGERLEFT ||
virtual_axis_active == SDL_CONTROLLER_AXIS_TRIGGERRIGHT) {
SDL_JoystickSetVirtualAxis(virtual_joystick, virtual_axis_active, SDL_JOYSTICK_AXIS_MIN);
} else {
SDL_JoystickSetVirtualAxis(virtual_joystick, virtual_axis_active, 0);
SDL_JoystickSetVirtualAxis(virtual_joystick, virtual_axis_active+1, 0);
}
virtual_axis_active = SDL_CONTROLLER_AXIS_INVALID;
}
}
void
loop(void *arg)
{
SDL_Event event;
int i;
SDL_bool showing_front;
/* Update to get the current event state */
SDL_PumpEvents();
/* Process all currently pending events */
while (SDL_PeepEvents(&event, 1, SDL_GETEVENT, SDL_FIRSTEVENT, SDL_LASTEVENT) == 1) {
switch (event.type) {
case SDL_CONTROLLERDEVICEADDED:
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);
DelController(event.cdevice.which);
break;
case SDL_CONTROLLERTOUCHPADDOWN:
case SDL_CONTROLLERTOUCHPADMOTION:
case SDL_CONTROLLERTOUCHPADUP:
SDL_Log("Controller %" SDL_PRIs32 " touchpad %" SDL_PRIs32 " finger %" SDL_PRIs32 " %s %.2f, %.2f, %.2f\n",
event.ctouchpad.which,
event.ctouchpad.touchpad,
event.ctouchpad.finger,
(event.type == SDL_CONTROLLERTOUCHPADDOWN ? "pressed at" : (event.type == SDL_CONTROLLERTOUCHPADUP ? "released at" : "moved to")),
event.ctouchpad.x,
event.ctouchpad.y,
event.ctouchpad.pressure);
break;
#define VERBOSE_SENSORS
#ifdef VERBOSE_SENSORS
case SDL_CONTROLLERSENSORUPDATE:
SDL_Log("Controller %" SDL_PRIs32 " sensor %s: %.2f, %.2f, %.2f (%" SDL_PRIu64 ")\n",
event.csensor.which,
GetSensorName((SDL_SensorType) event.csensor.sensor),
event.csensor.data[0],
event.csensor.data[1],
event.csensor.data[2],
event.csensor.timestamp_us);
break;
#endif /* VERBOSE_SENSORS */
#define VERBOSE_AXES
#ifdef VERBOSE_AXES
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 %" SDL_PRIs32 " axis %s changed to %d\n", event.caxis.which, SDL_GameControllerGetStringForAxis((SDL_GameControllerAxis) event.caxis.axis), event.caxis.value);
break;
#endif /* VERBOSE_AXES */
case SDL_CONTROLLERBUTTONDOWN:
case SDL_CONTROLLERBUTTONUP:
if (event.type == SDL_CONTROLLERBUTTONDOWN) {
SetController(event.cbutton.which);
}
SDL_Log("Controller %" SDL_PRIs32 " button %s %s\n", event.cbutton.which, SDL_GameControllerGetStringForButton((SDL_GameControllerButton) event.cbutton.button), event.cbutton.state ? "pressed" : "released");
/* Cycle PS5 trigger effects when the microphone button is pressed */
if (event.type == SDL_CONTROLLERBUTTONDOWN &&
event.cbutton.button == SDL_CONTROLLER_BUTTON_MISC1 &&
SDL_GameControllerGetType(gamecontroller) == SDL_CONTROLLER_TYPE_PS5) {
CyclePS5TriggerEffect();
}
break;
case SDL_JOYBATTERYUPDATED:
SDL_Log("Controller %" SDL_PRIs32 " battery state changed to %s\n", event.jbattery.which, power_level_strings[event.jbattery.level + 1]);
break;
case SDL_MOUSEBUTTONDOWN:
if (virtual_joystick) {
VirtualControllerMouseDown(event.button.x, event.button.y);
}
break;
case SDL_MOUSEBUTTONUP:
if (virtual_joystick) {
VirtualControllerMouseUp(event.button.x, event.button.y);
}
break;
case SDL_MOUSEMOTION:
if (virtual_joystick) {
VirtualControllerMouseMotion(event.motion.x, event.motion.y);
}
break;
case SDL_KEYDOWN:
if (event.key.keysym.sym >= SDLK_0 && event.key.keysym.sym <= SDLK_9) {
if (gamecontroller) {
int player_index = (event.key.keysym.sym - SDLK_0);
SDL_GameControllerSetPlayerIndex(gamecontroller, player_index);
}
break;
}
if (event.key.keysym.sym == SDLK_a) {
OpenVirtualController();
break;
}
if (event.key.keysym.sym == SDLK_d) {
CloseVirtualController();
break;
}
if (event.key.keysym.sym != SDLK_ESCAPE) {
break;
}
Add and use `SDL_FALLTHROUGH` for fallthroughs Case fallthrough warnings can be suppressed using the __fallthrough__ compiler attribute. Unfortunately, not all compilers have this attribute, or even have __has_attribute to check if they have the __fallthrough__ attribute. [[fallthrough]] is also available in C++17 and the next C2x, but not everyone uses C++17 or C2x. So define the SDL_FALLTHROUGH macro to deal with those problems - if we are using C++17 or C2x, it expands to [[fallthrough]]; else if the compiler has __has_attribute and has the __fallthrough__ attribute, then it expands to __attribute__((__fallthrough__)); else it expands to an empty statement, with a /* fallthrough */ comment (it's a do {} while (0) statement, because users of this macro need to use a semicolon, because [[fallthrough]] and __attribute__((__fallthrough__)) require a semicolon). Clang before Clang 10 and GCC before GCC 7 have problems with using __attribute__ as a sole statement and warn about a "declaration not declaring anything", so fall back to using the /* fallthrough */ comment if we are using those older compiler versions. Applications using SDL are also free to use this macro (because it is defined in begin_code.h). All existing /* fallthrough */ comments have been replaced with this macro. Some of them were unnecessary because they were the last case in a switch; using SDL_FALLTHROUGH in those cases would result in a compile error on compilers that support __fallthrough__, for having a __attribute__((__fallthrough__)) statement that didn't immediately precede a case label.
2021-09-27 15:38:12 -06:00
SDL_FALLTHROUGH;
case SDL_QUIT:
done = SDL_TRUE;
break;
default:
break;
}
}
showing_front = ShowingFront();
/* blank screen, set up for drawing this frame. */
SDL_SetRenderDrawColor(screen, 0xFF, 0xFF, 0xFF, SDL_ALPHA_OPAQUE);
SDL_RenderClear(screen);
SDL_RenderCopy(screen, showing_front ? background_front : background_back, NULL, NULL);
if (gamecontroller) {
/* Update visual controller state */
for (i = 0; i < SDL_CONTROLLER_BUTTON_TOUCHPAD; ++i) {
if (SDL_GameControllerGetButton(gamecontroller, (SDL_GameControllerButton)i) == SDL_PRESSED) {
SDL_bool on_front = (i < SDL_CONTROLLER_BUTTON_PADDLE1 || i > SDL_CONTROLLER_BUTTON_PADDLE4);
if (on_front == showing_front) {
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SDL_Rect dst;
dst.x = button_positions[i].x;
dst.y = button_positions[i].y;
dst.w = BUTTON_SIZE;
dst.h = BUTTON_SIZE;
SDL_RenderCopyEx(screen, button_texture, NULL, &dst, 0, NULL, SDL_FLIP_NONE);
}
}
}
if (showing_front) {
for (i = 0; i < SDL_CONTROLLER_AXIS_MAX; ++i) {
const Sint16 deadzone = 8000; /* !!! FIXME: real deadzone */
const Sint16 value = SDL_GameControllerGetAxis(gamecontroller, (SDL_GameControllerAxis)(i));
if (value < -deadzone) {
const double angle = axis_positions[i].angle;
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SDL_Rect dst;
dst.x = axis_positions[i].x;
dst.y = axis_positions[i].y;
dst.w = AXIS_SIZE;
dst.h = AXIS_SIZE;
SDL_RenderCopyEx(screen, axis_texture, NULL, &dst, angle, NULL, SDL_FLIP_NONE);
} else if (value > deadzone) {
const double angle = axis_positions[i].angle + 180.0;
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SDL_Rect dst;
dst.x = axis_positions[i].x;
dst.y = axis_positions[i].y;
dst.w = AXIS_SIZE;
dst.h = AXIS_SIZE;
SDL_RenderCopyEx(screen, axis_texture, NULL, &dst, angle, NULL, SDL_FLIP_NONE);
}
}
}
/* Update LED based on left thumbstick position */
{
Sint16 x = SDL_GameControllerGetAxis(gamecontroller, SDL_CONTROLLER_AXIS_LEFTX);
Sint16 y = SDL_GameControllerGetAxis(gamecontroller, SDL_CONTROLLER_AXIS_LEFTY);
if (!set_LED) {
set_LED = (x < -8000 || x > 8000 || y > 8000);
}
if (set_LED) {
Uint8 r, g, b;
if (x < 0) {
r = (Uint8)(((int)(~x) * 255) / 32767);
b = 0;
} else {
r = 0;
b = (Uint8)(((int)(x) * 255) / 32767);
}
if (y > 0) {
g = (Uint8)(((int)(y) * 255) / 32767);
} else {
g = 0;
}
SDL_GameControllerSetLED(gamecontroller, r, g, b);
}
}
if (trigger_effect == 0) {
/* Update rumble based on trigger state */
{
Sint16 left = SDL_GameControllerGetAxis(gamecontroller, SDL_CONTROLLER_AXIS_TRIGGERLEFT);
Sint16 right = SDL_GameControllerGetAxis(gamecontroller, SDL_CONTROLLER_AXIS_TRIGGERRIGHT);
Uint16 low_frequency_rumble = ConvertAxisToRumble(left);
Uint16 high_frequency_rumble = ConvertAxisToRumble(right);
SDL_GameControllerRumble(gamecontroller, low_frequency_rumble, high_frequency_rumble, 250);
}
/* Update trigger rumble based on thumbstick state */
{
Sint16 left = SDL_GameControllerGetAxis(gamecontroller, SDL_CONTROLLER_AXIS_LEFTY);
Sint16 right = SDL_GameControllerGetAxis(gamecontroller, SDL_CONTROLLER_AXIS_RIGHTY);
Uint16 left_rumble = ConvertAxisToRumble(~left);
Uint16 right_rumble = ConvertAxisToRumble(~right);
SDL_GameControllerRumbleTriggers(gamecontroller, left_rumble, right_rumble, 250);
}
}
}
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SDL_Delay(16);
SDL_RenderPresent(screen);
#ifdef __EMSCRIPTEN__
if (done) {
emscripten_cancel_main_loop();
}
#endif
}
int
main(int argc, char *argv[])
{
int i;
int controller_count = 0;
int controller_index = 0;
char guid[64];
SDL_SetHint(SDL_HINT_ACCELEROMETER_AS_JOYSTICK, "0");
SDL_SetHint(SDL_HINT_JOYSTICK_HIDAPI_PS4_RUMBLE, "1");
SDL_SetHint(SDL_HINT_JOYSTICK_HIDAPI_PS5_RUMBLE, "1");
SDL_SetHint(SDL_HINT_JOYSTICK_ROG_CHAKRAM, "1");
SDL_SetHint(SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS, "1");
SDL_SetHint(SDL_HINT_LINUX_JOYSTICK_DEADZONES, "1");
/* Enable standard application logging */
SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
/* Initialize SDL (Note: video is required to start event loop) */
if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK | SDL_INIT_GAMECONTROLLER ) < 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
return 1;
}
SDL_GameControllerAddMappingsFromFile("gamecontrollerdb.txt");
/* Print information about the mappings */
if (argv[1] && SDL_strcmp(argv[1], "--mappings") == 0) {
SDL_Log("Supported mappings:\n");
for (i = 0; i < SDL_GameControllerNumMappings(); ++i) {
char *mapping = SDL_GameControllerMappingForIndex(i);
if (mapping) {
SDL_Log("\t%s\n", mapping);
SDL_free(mapping);
}
}
SDL_Log("\n");
}
/* Print information about the controller */
for (i = 0; i < SDL_NumJoysticks(); ++i) {
const char *name;
const char *path;
const char *description;
SDL_JoystickGetGUIDString(SDL_JoystickGetDeviceGUID(i),
guid, sizeof (guid));
if (SDL_IsGameController(i)) {
controller_count++;
name = SDL_GameControllerNameForIndex(i);
path = SDL_GameControllerPathForIndex(i);
switch (SDL_GameControllerTypeForIndex(i)) {
case SDL_CONTROLLER_TYPE_AMAZON_LUNA:
description = "Amazon Luna Controller";
break;
case SDL_CONTROLLER_TYPE_GOOGLE_STADIA:
description = "Google Stadia Controller";
break;
case SDL_CONTROLLER_TYPE_NINTENDO_SWITCH_JOYCON_LEFT:
case SDL_CONTROLLER_TYPE_NINTENDO_SWITCH_JOYCON_RIGHT:
case SDL_CONTROLLER_TYPE_NINTENDO_SWITCH_JOYCON_PAIR:
description = "Nintendo Switch Joy-Con";
break;
case SDL_CONTROLLER_TYPE_NINTENDO_SWITCH_PRO:
description = "Nintendo Switch Pro Controller";
break;
case SDL_CONTROLLER_TYPE_PS3:
description = "PS3 Controller";
break;
case SDL_CONTROLLER_TYPE_PS4:
description = "PS4 Controller";
break;
case SDL_CONTROLLER_TYPE_PS5:
description = "PS5 Controller";
break;
case SDL_CONTROLLER_TYPE_XBOX360:
description = "XBox 360 Controller";
break;
case SDL_CONTROLLER_TYPE_XBOXONE:
description = "XBox One Controller";
break;
Fixed bug 5028 - Virtual Joysticks (new joystick backend) David Ludwig I have created a new driver for SDL's Joystick and Game-Controller subsystem: a Virtual driver. This driver allows one to create a software-based joystick, which to SDL applications will look and react like a real joystick, but whose state can be set programmatically. A primary use case for this is to help enable developers to add touch-screen joysticks to their apps. The driver comes with a set of new, public APIs, with functions to attach and detach joysticks, set virtual-joystick state, and to determine if a joystick is a virtual-one. Use of virtual joysticks goes as such: 1. Attach one or more virtual joysticks by calling SDL_JoystickAttachVirtual. If successful, this returns the virtual-device's joystick-index. 2. Open the virtual joysticks (using indicies returned by SDL_JoystickAttachVirtual). 3. Call any of the SDL_JoystickSetVirtual* functions when joystick-state changes. Please note that virtual-joystick state will only get applied on the next call to SDL_JoystickUpdate, or when pumping or polling for SDL events (via SDL_PumpEvents or SDL_PollEvent). Here is a listing of the new, public APIs, at present and subject to change: ------------------------------------------------------------ /** * Attaches a new virtual joystick. * Returns the joystick's device index, or -1 if an error occurred. */ extern DECLSPEC int SDLCALL SDL_JoystickAttachVirtual(SDL_JoystickType type, int naxes, int nballs, int nbuttons, int nhats); /** * Detaches a virtual joystick * Returns 0 on success, or -1 if an error occurred. */ extern DECLSPEC int SDLCALL SDL_JoystickDetachVirtual(int device_index); /** * Indicates whether or not a virtual-joystick is at a given device index. */ extern DECLSPEC SDL_bool SDLCALL SDL_JoystickIsVirtual(int device_index); /** * Set values on an opened, virtual-joystick's controls. * Returns 0 on success, -1 on error. */ extern DECLSPEC int SDLCALL SDL_JoystickSetVirtualAxis(SDL_Joystick * joystick, int axis, Sint16 value); extern DECLSPEC int SDLCALL SDL_JoystickSetVirtualBall(SDL_Joystick * joystick, int ball, Sint16 xrel, Sint16 yrel); extern DECLSPEC int SDLCALL SDL_JoystickSetVirtualButton(SDL_Joystick * joystick, int button, Uint8 value); extern DECLSPEC int SDLCALL SDL_JoystickSetVirtualHat(SDL_Joystick * joystick, int hat, Uint8 value); ------------------------------------------------------------ Miscellaneous notes on the initial patch, which are also subject to change: 1. no test code is present in SDL, yet. This should, perhaps, change. Initial development was done with an ImGui-based app, which potentially is too thick for use in SDL-official. If tests are to be added, what kind of tests? Automated? Graphical? 2. virtual game controllers can be created by calling SDL_JoystickAttachVirtual with a joystick-type of SDL_JOYSTICK_TYPE_GAME_CONTROLLER, with naxes (num axes) set to SDL_CONTROLLER_AXIS_MAX, and with nbuttons (num buttons) set to SDL_CONTROLLER_BUTTON_MAX. When updating their state, values of type SDL_GameControllerAxis or SDL_GameControllerButton can be casted to an int and used for the control-index (in calls to SDL_JoystickSetVirtual* functions). 3. virtual joysticks' guids are mostly all-zeros with the exception of the last two bytes, the first of which is a 'v', to indicate that the guid is a virtual one, and the second of which is a SDL_JoystickType that has been converted into a Uint8. 4. virtual joysticks are ONLY turned into virtual game-controllers if and when their joystick-type is set to SDL_JOYSTICK_TYPE_GAMECONTROLLER. This is controlled by having SDL's default list of game-controllers have a single entry for a virtual game controller (of guid, "00000000000000000000000000007601", which is subject to the guid-encoding described above). 5. regarding having to call SDL_JoystickUpdate, either directly or indirectly via SDL_PumpEvents or SDL_PollEvents, before new virtual-joystick state becomes active (as specified via SDL_JoystickSetVirtual* function-calls), this was done to match behavior found in SDL's other joystick drivers, almost all of which will only update SDL-state during SDL_JoystickUpdate. 6. the initial patch is based off of SDL 2.0.12 7. the virtual joystick subsystem is disabled by default. It should be possible to enable it by building with SDL_JOYSTICK_VIRTUAL=1 Questions, comments, suggestions, or bug reports very welcome!
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case SDL_CONTROLLER_TYPE_VIRTUAL:
description = "Virtual Game Controller";
break;
default:
description = "Game Controller";
break;
}
AddController(i, SDL_FALSE);
} else {
name = SDL_JoystickNameForIndex(i);
path = SDL_JoystickPathForIndex(i);
description = "Joystick";
}
SDL_Log("%s %d: %s%s%s (guid %s, VID 0x%.4x, PID 0x%.4x, player index = %d)\n",
description, i, name ? name : "Unknown", path ? ", " : "", path ? path : "", guid,
SDL_JoystickGetDeviceVendor(i), SDL_JoystickGetDeviceProduct(i), SDL_JoystickGetDevicePlayerIndex(i));
}
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,
SDL_WINDOWPOS_CENTERED, SCREEN_WIDTH,
SCREEN_HEIGHT, 0);
if (window == NULL) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create window: %s\n", SDL_GetError());
return 2;
}
screen = SDL_CreateRenderer(window, -1, 0);
if (screen == NULL) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create renderer: %s\n", SDL_GetError());
SDL_DestroyWindow(window);
return 2;
}
SDL_SetRenderDrawColor(screen, 0x00, 0x00, 0x00, SDL_ALPHA_OPAQUE);
SDL_RenderClear(screen);
SDL_RenderPresent(screen);
/* scale for platforms that don't give you the window size you asked for. */
SDL_RenderSetLogicalSize(screen, SCREEN_WIDTH, SCREEN_HEIGHT);
background_front = LoadTexture(screen, "controllermap.bmp", SDL_FALSE, NULL, NULL);
background_back = LoadTexture(screen, "controllermap_back.bmp", SDL_FALSE, NULL, NULL);
button_texture = LoadTexture(screen, "button.bmp", SDL_TRUE, NULL, NULL);
axis_texture = LoadTexture(screen, "axis.bmp", SDL_TRUE, NULL, NULL);
if (!background_front || !background_back || !button_texture || !axis_texture) {
SDL_DestroyRenderer(screen);
SDL_DestroyWindow(window);
return 2;
}
SDL_SetTextureColorMod(button_texture, 10, 255, 21);
SDL_SetTextureColorMod(axis_texture, 10, 255, 21);
/* !!! FIXME: */
/*SDL_RenderSetLogicalSize(screen, background->w, background->h);*/
for (i = 1; i < argc; ++i) {
if (SDL_strcmp(argv[i], "--virtual") == 0) {
OpenVirtualController();
}
if (argv[i] && *argv[i] != '-') {
controller_index = SDL_atoi(argv[i]);
break;
}
}
if (controller_index < num_controllers) {
gamecontroller = gamecontrollers[controller_index];
} else {
gamecontroller = NULL;
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}
UpdateWindowTitle();
/* Loop, getting controller events! */
#ifdef __EMSCRIPTEN__
emscripten_set_main_loop_arg(loop, NULL, 0, 1);
#else
while (!done) {
loop(NULL);
}
#endif
/* Reset trigger state */
if (trigger_effect != 0) {
trigger_effect = -1;
CyclePS5TriggerEffect();
}
CloseVirtualController();
SDL_DestroyRenderer(screen);
SDL_DestroyWindow(window);
SDL_QuitSubSystem(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK | SDL_INIT_GAMECONTROLLER);
return 0;
}
#else
int
main(int argc, char *argv[])
{
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL compiled without Joystick support.\n");
return 1;
}
#endif
/* vi: set ts=4 sw=4 expandtab: */