326 lines
9.8 KiB
C
Executable file
326 lines
9.8 KiB
C
Executable file
/*
|
|
Copyright (C) 1997-2020 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 joystick routines */
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "SDL.h"
|
|
|
|
#ifdef __EMSCRIPTEN__
|
|
#include <emscripten/emscripten.h>
|
|
#endif
|
|
|
|
#ifndef SDL_JOYSTICK_DISABLED
|
|
|
|
#ifdef __IPHONEOS__
|
|
#define SCREEN_WIDTH 320
|
|
#define SCREEN_HEIGHT 480
|
|
#else
|
|
#define SCREEN_WIDTH 640
|
|
#define SCREEN_HEIGHT 480
|
|
#endif
|
|
|
|
static SDL_Window *window = NULL;
|
|
static SDL_Renderer *screen = NULL;
|
|
static SDL_Joystick *joystick = NULL;
|
|
static SDL_bool done = SDL_FALSE;
|
|
|
|
static void
|
|
PrintJoystick(SDL_Joystick *joystick)
|
|
{
|
|
const char *type;
|
|
char guid[64];
|
|
|
|
SDL_assert(SDL_JoystickFromInstanceID(SDL_JoystickInstanceID(joystick)) == joystick);
|
|
SDL_JoystickGetGUIDString(SDL_JoystickGetGUID(joystick), guid, sizeof (guid));
|
|
switch (SDL_JoystickGetType(joystick)) {
|
|
case SDL_JOYSTICK_TYPE_GAMECONTROLLER:
|
|
type = "Game Controller";
|
|
break;
|
|
case SDL_JOYSTICK_TYPE_WHEEL:
|
|
type = "Wheel";
|
|
break;
|
|
case SDL_JOYSTICK_TYPE_ARCADE_STICK:
|
|
type = "Arcade Stick";
|
|
break;
|
|
case SDL_JOYSTICK_TYPE_FLIGHT_STICK:
|
|
type = "Flight Stick";
|
|
break;
|
|
case SDL_JOYSTICK_TYPE_DANCE_PAD:
|
|
type = "Dance Pad";
|
|
break;
|
|
case SDL_JOYSTICK_TYPE_GUITAR:
|
|
type = "Guitar";
|
|
break;
|
|
case SDL_JOYSTICK_TYPE_DRUM_KIT:
|
|
type = "Drum Kit";
|
|
break;
|
|
case SDL_JOYSTICK_TYPE_ARCADE_PAD:
|
|
type = "Arcade Pad";
|
|
break;
|
|
case SDL_JOYSTICK_TYPE_THROTTLE:
|
|
type = "Throttle";
|
|
break;
|
|
default:
|
|
type = "Unknown";
|
|
break;
|
|
}
|
|
SDL_Log("Joystick\n");
|
|
SDL_Log(" name: %s\n", SDL_JoystickName(joystick));
|
|
SDL_Log(" type: %s\n", type);
|
|
SDL_Log(" axes: %d\n", SDL_JoystickNumAxes(joystick));
|
|
SDL_Log(" balls: %d\n", SDL_JoystickNumBalls(joystick));
|
|
SDL_Log(" hats: %d\n", SDL_JoystickNumHats(joystick));
|
|
SDL_Log(" buttons: %d\n", SDL_JoystickNumButtons(joystick));
|
|
SDL_Log("instance id: %d\n", SDL_JoystickInstanceID(joystick));
|
|
SDL_Log(" guid: %s\n", guid);
|
|
SDL_Log(" VID/PID: 0x%.4x/0x%.4x\n", SDL_JoystickGetVendor(joystick), SDL_JoystickGetProduct(joystick));
|
|
}
|
|
|
|
static void
|
|
DrawRect(SDL_Renderer *r, const int x, const int y, const int w, const int h)
|
|
{
|
|
const SDL_Rect area = { x, y, w, h };
|
|
SDL_RenderFillRect(r, &area);
|
|
}
|
|
|
|
void
|
|
loop(void *arg)
|
|
{
|
|
SDL_Event event;
|
|
int i;
|
|
|
|
/* blank screen, set up for drawing this frame. */
|
|
SDL_SetRenderDrawColor(screen, 0x0, 0x0, 0x0, SDL_ALPHA_OPAQUE);
|
|
SDL_RenderClear(screen);
|
|
|
|
while (SDL_PollEvent(&event)) {
|
|
switch (event.type) {
|
|
|
|
case SDL_JOYDEVICEADDED:
|
|
SDL_Log("Joystick device %d added.\n", (int) event.jdevice.which);
|
|
if (!joystick) {
|
|
joystick = SDL_JoystickOpen(event.jdevice.which);
|
|
if (joystick) {
|
|
PrintJoystick(joystick);
|
|
} else {
|
|
SDL_Log("Couldn't open joystick: %s\n", SDL_GetError());
|
|
}
|
|
}
|
|
break;
|
|
|
|
case SDL_JOYDEVICEREMOVED:
|
|
SDL_Log("Joystick device %d removed.\n", (int) event.jdevice.which);
|
|
if (event.jdevice.which == SDL_JoystickInstanceID(joystick)) {
|
|
SDL_JoystickClose(joystick);
|
|
joystick = SDL_JoystickOpen(0);
|
|
}
|
|
break;
|
|
|
|
case SDL_JOYAXISMOTION:
|
|
SDL_Log("Joystick %d axis %d value: %d\n",
|
|
event.jaxis.which,
|
|
event.jaxis.axis, event.jaxis.value);
|
|
break;
|
|
case SDL_JOYHATMOTION:
|
|
SDL_Log("Joystick %d hat %d value:",
|
|
event.jhat.which, event.jhat.hat);
|
|
if (event.jhat.value == SDL_HAT_CENTERED)
|
|
SDL_Log(" centered");
|
|
if (event.jhat.value & SDL_HAT_UP)
|
|
SDL_Log(" up");
|
|
if (event.jhat.value & SDL_HAT_RIGHT)
|
|
SDL_Log(" right");
|
|
if (event.jhat.value & SDL_HAT_DOWN)
|
|
SDL_Log(" down");
|
|
if (event.jhat.value & SDL_HAT_LEFT)
|
|
SDL_Log(" left");
|
|
SDL_Log("\n");
|
|
break;
|
|
case SDL_JOYBALLMOTION:
|
|
SDL_Log("Joystick %d ball %d delta: (%d,%d)\n",
|
|
event.jball.which,
|
|
event.jball.ball, event.jball.xrel, event.jball.yrel);
|
|
break;
|
|
case SDL_JOYBUTTONDOWN:
|
|
SDL_Log("Joystick %d button %d down\n",
|
|
event.jbutton.which, event.jbutton.button);
|
|
/* First button triggers a 0.5 second full strength rumble */
|
|
if (event.jbutton.button == 0) {
|
|
SDL_JoystickRumble(joystick, 0xFFFF, 0xFFFF, 500);
|
|
}
|
|
break;
|
|
case SDL_JOYBUTTONUP:
|
|
SDL_Log("Joystick %d button %d up\n",
|
|
event.jbutton.which, event.jbutton.button);
|
|
break;
|
|
case SDL_KEYDOWN:
|
|
/* Press the L key to lag for 3 seconds, to see what happens
|
|
when SDL doesn't service the event loop quickly. */
|
|
if (event.key.keysym.sym == SDLK_l) {
|
|
SDL_Log("Lagging for 3 seconds...\n");
|
|
SDL_Delay(3000);
|
|
break;
|
|
}
|
|
|
|
if ((event.key.keysym.sym != SDLK_ESCAPE) &&
|
|
(event.key.keysym.sym != SDLK_AC_BACK)) {
|
|
break;
|
|
}
|
|
/* Fall through to signal quit */
|
|
case SDL_FINGERDOWN:
|
|
case SDL_MOUSEBUTTONDOWN:
|
|
case SDL_QUIT:
|
|
done = SDL_TRUE;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (joystick) {
|
|
|
|
/* Update visual joystick state */
|
|
SDL_SetRenderDrawColor(screen, 0x00, 0xFF, 0x00, SDL_ALPHA_OPAQUE);
|
|
for (i = 0; i < SDL_JoystickNumButtons(joystick); ++i) {
|
|
if (SDL_JoystickGetButton(joystick, i) == SDL_PRESSED) {
|
|
DrawRect(screen, (i%20) * 34, SCREEN_HEIGHT - 68 + (i/20) * 34, 32, 32);
|
|
}
|
|
}
|
|
|
|
SDL_SetRenderDrawColor(screen, 0xFF, 0x00, 0x00, SDL_ALPHA_OPAQUE);
|
|
for (i = 0; i < SDL_JoystickNumAxes(joystick); ++i) {
|
|
/* Draw the X/Y axis */
|
|
int x, y;
|
|
x = (((int) SDL_JoystickGetAxis(joystick, i)) + 32768);
|
|
x *= SCREEN_WIDTH;
|
|
x /= 65535;
|
|
if (x < 0) {
|
|
x = 0;
|
|
} else if (x > (SCREEN_WIDTH - 16)) {
|
|
x = SCREEN_WIDTH - 16;
|
|
}
|
|
++i;
|
|
if (i < SDL_JoystickNumAxes(joystick)) {
|
|
y = (((int) SDL_JoystickGetAxis(joystick, i)) + 32768);
|
|
} else {
|
|
y = 32768;
|
|
}
|
|
y *= SCREEN_HEIGHT;
|
|
y /= 65535;
|
|
if (y < 0) {
|
|
y = 0;
|
|
} else if (y > (SCREEN_HEIGHT - 16)) {
|
|
y = SCREEN_HEIGHT - 16;
|
|
}
|
|
|
|
DrawRect(screen, x, y, 16, 16);
|
|
}
|
|
|
|
SDL_SetRenderDrawColor(screen, 0x00, 0x00, 0xFF, SDL_ALPHA_OPAQUE);
|
|
for (i = 0; i < SDL_JoystickNumHats(joystick); ++i) {
|
|
/* Derive the new position */
|
|
int x = SCREEN_WIDTH/2;
|
|
int y = SCREEN_HEIGHT/2;
|
|
const Uint8 hat_pos = SDL_JoystickGetHat(joystick, i);
|
|
|
|
if (hat_pos & SDL_HAT_UP) {
|
|
y = 0;
|
|
} else if (hat_pos & SDL_HAT_DOWN) {
|
|
y = SCREEN_HEIGHT-8;
|
|
}
|
|
|
|
if (hat_pos & SDL_HAT_LEFT) {
|
|
x = 0;
|
|
} else if (hat_pos & SDL_HAT_RIGHT) {
|
|
x = SCREEN_WIDTH-8;
|
|
}
|
|
|
|
DrawRect(screen, x, y, 8, 8);
|
|
}
|
|
}
|
|
|
|
SDL_RenderPresent(screen);
|
|
|
|
#ifdef __EMSCRIPTEN__
|
|
if (done) {
|
|
emscripten_cancel_main_loop();
|
|
}
|
|
#endif
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
SDL_SetHint(SDL_HINT_ACCELEROMETER_AS_JOYSTICK, "0");
|
|
|
|
/* 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) < 0) {
|
|
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
|
|
exit(1);
|
|
}
|
|
|
|
/* Create a window to display joystick axis position */
|
|
window = SDL_CreateWindow("Joystick 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 SDL_FALSE;
|
|
}
|
|
|
|
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 SDL_FALSE;
|
|
}
|
|
|
|
SDL_SetRenderDrawColor(screen, 0x00, 0x00, 0x00, SDL_ALPHA_OPAQUE);
|
|
SDL_RenderClear(screen);
|
|
SDL_RenderPresent(screen);
|
|
|
|
/* Loop, getting joystick events! */
|
|
#ifdef __EMSCRIPTEN__
|
|
emscripten_set_main_loop_arg(loop, NULL, 0, 1);
|
|
#else
|
|
while (!done) {
|
|
loop(NULL);
|
|
}
|
|
#endif
|
|
|
|
SDL_DestroyRenderer(screen);
|
|
SDL_DestroyWindow(window);
|
|
|
|
SDL_QuitSubSystem(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK);
|
|
|
|
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: */
|