test/testjoystick.c
author Sam Lantinga <slouken@libsdl.org>
Sun, 01 Jan 2017 18:33:28 -0800
changeset 10737 3406a0f8b041
parent 10707 28c1a3f9c88b
child 10867 a512396c9f3f
permissions -rw-r--r--
Updated copyright for 2017
slouken@5535
     1
/*
slouken@10737
     2
  Copyright (C) 1997-2017 Sam Lantinga <slouken@libsdl.org>
slouken@5535
     3
slouken@5535
     4
  This software is provided 'as-is', without any express or implied
slouken@5535
     5
  warranty.  In no event will the authors be held liable for any damages
slouken@5535
     6
  arising from the use of this software.
slouken@5535
     7
slouken@5535
     8
  Permission is granted to anyone to use this software for any purpose,
slouken@5535
     9
  including commercial applications, and to alter it and redistribute it
slouken@5535
    10
  freely.
slouken@5535
    11
*/
slouken@0
    12
slouken@0
    13
/* Simple program to test the SDL joystick routines */
slouken@0
    14
slouken@0
    15
#include <stdio.h>
slouken@0
    16
#include <stdlib.h>
slouken@0
    17
#include <string.h>
slouken@0
    18
slouken@0
    19
#include "SDL.h"
slouken@0
    20
icculus@9278
    21
#ifdef __EMSCRIPTEN__
icculus@9278
    22
#include <emscripten/emscripten.h>
icculus@9278
    23
#endif
icculus@9278
    24
aschiffler@6771
    25
#ifndef SDL_JOYSTICK_DISABLED
aschiffler@6771
    26
slouken@6690
    27
#ifdef __IPHONEOS__
slouken@7191
    28
#define SCREEN_WIDTH    320
slouken@7191
    29
#define SCREEN_HEIGHT   480
slouken@6690
    30
#else
slouken@7191
    31
#define SCREEN_WIDTH    640
slouken@7191
    32
#define SCREEN_HEIGHT   480
slouken@6690
    33
#endif
slouken@0
    34
icculus@9278
    35
SDL_Renderer *screen = NULL;
icculus@9278
    36
SDL_bool retval = SDL_FALSE;
icculus@9278
    37
SDL_bool done = SDL_FALSE;
aschiffler@6771
    38
icculus@6398
    39
static void
icculus@6398
    40
DrawRect(SDL_Renderer *r, const int x, const int y, const int w, const int h)
icculus@6398
    41
{
icculus@6398
    42
    const SDL_Rect area = { x, y, w, h };
icculus@6398
    43
    SDL_RenderFillRect(r, &area);
icculus@6398
    44
}
icculus@6398
    45
icculus@9278
    46
void
icculus@9278
    47
loop(void *arg)
slouken@0
    48
{
slouken@6690
    49
    SDL_Event event;
icculus@6398
    50
    int i;
icculus@9278
    51
    SDL_Joystick *joystick = (SDL_Joystick *)arg;
slouken@0
    52
slouken@6690
    53
        /* blank screen, set up for drawing this frame. */
icculus@9278
    54
    SDL_SetRenderDrawColor(screen, 0x0, 0x0, 0x0, SDL_ALPHA_OPAQUE);
slouken@6690
    55
        SDL_RenderClear(screen);
slouken@6690
    56
slouken@1895
    57
        while (SDL_PollEvent(&event)) {
slouken@1895
    58
            switch (event.type) {
icculus@9433
    59
icculus@9433
    60
            case SDL_JOYDEVICEREMOVED:
icculus@9433
    61
                SDL_Log("Joystick device %d removed.\n", (int) event.jdevice.which);
icculus@9433
    62
                SDL_Log("Our instance ID is %d\n", (int) SDL_JoystickInstanceID(joystick));
icculus@9433
    63
                break;
icculus@9433
    64
slouken@1895
    65
            case SDL_JOYAXISMOTION:
aschiffler@7639
    66
                SDL_Log("Joystick %d axis %d value: %d\n",
slouken@1895
    67
                       event.jaxis.which,
slouken@1895
    68
                       event.jaxis.axis, event.jaxis.value);
slouken@1895
    69
                break;
slouken@1895
    70
            case SDL_JOYHATMOTION:
aschiffler@7639
    71
                SDL_Log("Joystick %d hat %d value:",
slouken@1895
    72
                       event.jhat.which, event.jhat.hat);
slouken@1895
    73
                if (event.jhat.value == SDL_HAT_CENTERED)
aschiffler@7639
    74
                    SDL_Log(" centered");
slouken@1895
    75
                if (event.jhat.value & SDL_HAT_UP)
aschiffler@7639
    76
                    SDL_Log(" up");
slouken@1895
    77
                if (event.jhat.value & SDL_HAT_RIGHT)
aschiffler@7639
    78
                    SDL_Log(" right");
slouken@1895
    79
                if (event.jhat.value & SDL_HAT_DOWN)
aschiffler@7639
    80
                    SDL_Log(" down");
slouken@1895
    81
                if (event.jhat.value & SDL_HAT_LEFT)
aschiffler@7639
    82
                    SDL_Log(" left");
aschiffler@7639
    83
                SDL_Log("\n");
slouken@1895
    84
                break;
slouken@1895
    85
            case SDL_JOYBALLMOTION:
aschiffler@7639
    86
                SDL_Log("Joystick %d ball %d delta: (%d,%d)\n",
slouken@1895
    87
                       event.jball.which,
slouken@1895
    88
                       event.jball.ball, event.jball.xrel, event.jball.yrel);
slouken@1895
    89
                break;
slouken@1895
    90
            case SDL_JOYBUTTONDOWN:
aschiffler@7639
    91
                SDL_Log("Joystick %d button %d down\n",
slouken@1895
    92
                       event.jbutton.which, event.jbutton.button);
slouken@1895
    93
                break;
slouken@1895
    94
            case SDL_JOYBUTTONUP:
aschiffler@7639
    95
                SDL_Log("Joystick %d button %d up\n",
slouken@1895
    96
                       event.jbutton.which, event.jbutton.button);
slouken@1895
    97
                break;
slouken@1895
    98
            case SDL_KEYDOWN:
slouken@7017
    99
                if ((event.key.keysym.sym != SDLK_ESCAPE) &&
slouken@7017
   100
                    (event.key.keysym.sym != SDLK_AC_BACK)) {
slouken@1895
   101
                    break;
slouken@1895
   102
                }
slouken@1895
   103
                /* Fall through to signal quit */
slouken@7017
   104
            case SDL_FINGERDOWN:
slouken@7017
   105
            case SDL_MOUSEBUTTONDOWN:
slouken@1895
   106
            case SDL_QUIT:
icculus@6730
   107
                done = SDL_TRUE;
slouken@1895
   108
                break;
slouken@1895
   109
            default:
slouken@1895
   110
                break;
slouken@1895
   111
            }
slouken@1895
   112
        }
slouken@6690
   113
        /* Update visual joystick state */
slouken@6690
   114
        SDL_SetRenderDrawColor(screen, 0x00, 0xFF, 0x00, SDL_ALPHA_OPAQUE);
slouken@6690
   115
        for (i = 0; i < SDL_JoystickNumButtons(joystick); ++i) {
slouken@6690
   116
            if (SDL_JoystickGetButton(joystick, i) == SDL_PRESSED) {
slouken@7017
   117
                DrawRect(screen, (i%20) * 34, SCREEN_HEIGHT - 68 + (i/20) * 34, 32, 32);
slouken@6690
   118
            }
slouken@6690
   119
        }
slouken@6586
   120
slouken@6690
   121
        SDL_SetRenderDrawColor(screen, 0xFF, 0x00, 0x00, SDL_ALPHA_OPAQUE);
slouken@7017
   122
        for (i = 0; i < SDL_JoystickNumAxes(joystick); ++i) {
slouken@6690
   123
            /* Draw the X/Y axis */
slouken@6690
   124
            int x, y;
slouken@7017
   125
            x = (((int) SDL_JoystickGetAxis(joystick, i)) + 32768);
slouken@6690
   126
            x *= SCREEN_WIDTH;
slouken@6690
   127
            x /= 65535;
slouken@6690
   128
            if (x < 0) {
slouken@6690
   129
                x = 0;
slouken@6690
   130
            } else if (x > (SCREEN_WIDTH - 16)) {
slouken@6690
   131
                x = SCREEN_WIDTH - 16;
slouken@6690
   132
            }
slouken@7017
   133
            ++i;
slouken@7017
   134
            if (i < SDL_JoystickNumAxes(joystick)) {
slouken@7017
   135
                y = (((int) SDL_JoystickGetAxis(joystick, i)) + 32768);
slouken@7017
   136
            } else {
slouken@7017
   137
                y = 32768;
slouken@7017
   138
            }
slouken@6690
   139
            y *= SCREEN_HEIGHT;
slouken@6690
   140
            y /= 65535;
slouken@6690
   141
            if (y < 0) {
slouken@6690
   142
                y = 0;
slouken@6690
   143
            } else if (y > (SCREEN_HEIGHT - 16)) {
slouken@6690
   144
                y = SCREEN_HEIGHT - 16;
slouken@1895
   145
            }
slouken@2765
   146
slouken@6690
   147
            DrawRect(screen, x, y, 16, 16);
slouken@6690
   148
        }
icculus@6397
   149
slouken@6690
   150
        SDL_SetRenderDrawColor(screen, 0x00, 0x00, 0xFF, SDL_ALPHA_OPAQUE);
slouken@6690
   151
        for (i = 0; i < SDL_JoystickNumHats(joystick); ++i) {
slouken@6690
   152
            /* Derive the new position */
slouken@6690
   153
            int x = SCREEN_WIDTH/2;
slouken@6690
   154
            int y = SCREEN_HEIGHT/2;
slouken@6690
   155
            const Uint8 hat_pos = SDL_JoystickGetHat(joystick, i);
slouken@6690
   156
slouken@6690
   157
            if (hat_pos & SDL_HAT_UP) {
slouken@6690
   158
                y = 0;
slouken@6690
   159
            } else if (hat_pos & SDL_HAT_DOWN) {
slouken@6690
   160
                y = SCREEN_HEIGHT-8;
icculus@6397
   161
            }
icculus@6397
   162
slouken@6690
   163
            if (hat_pos & SDL_HAT_LEFT) {
slouken@6690
   164
                x = 0;
slouken@6690
   165
            } else if (hat_pos & SDL_HAT_RIGHT) {
slouken@6690
   166
                x = SCREEN_WIDTH-8;
icculus@6397
   167
            }
icculus@6397
   168
slouken@6690
   169
            DrawRect(screen, x, y, 8, 8);
slouken@1895
   170
        }
slouken@6690
   171
slouken@6690
   172
        SDL_RenderPresent(screen);
icculus@6730
   173
icculus@6730
   174
        if (SDL_JoystickGetAttached( joystick ) == 0) {
icculus@6730
   175
            done = SDL_TRUE;
icculus@6730
   176
            retval = SDL_TRUE;  /* keep going, wait for reattach. */
icculus@6730
   177
        }
philipp@9607
   178
philipp@9607
   179
#ifdef __EMSCRIPTEN__
philipp@9607
   180
    if (done) {
philipp@9607
   181
        emscripten_cancel_main_loop();
philipp@9607
   182
    }
philipp@9607
   183
#endif
icculus@9278
   184
}
icculus@9278
   185
icculus@9278
   186
static SDL_bool
icculus@9278
   187
WatchJoystick(SDL_Joystick * joystick)
icculus@9278
   188
{
icculus@9278
   189
    SDL_Window *window = NULL;
icculus@9278
   190
    const char *name = NULL;
philipp@9340
   191
philipp@9340
   192
    retval = SDL_FALSE;
philipp@9338
   193
    done = SDL_FALSE;
icculus@9278
   194
icculus@9278
   195
    /* Create a window to display joystick axis position */
icculus@9278
   196
    window = SDL_CreateWindow("Joystick Test", SDL_WINDOWPOS_CENTERED,
icculus@9278
   197
                              SDL_WINDOWPOS_CENTERED, SCREEN_WIDTH,
icculus@9278
   198
                              SCREEN_HEIGHT, 0);
icculus@9278
   199
    if (window == NULL) {
icculus@9278
   200
        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create window: %s\n", SDL_GetError());
icculus@9278
   201
        return SDL_FALSE;
slouken@1895
   202
    }
slouken@6690
   203
icculus@9278
   204
    screen = SDL_CreateRenderer(window, -1, 0);
icculus@9278
   205
    if (screen == NULL) {
icculus@9278
   206
        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create renderer: %s\n", SDL_GetError());
icculus@9278
   207
        SDL_DestroyWindow(window);
icculus@9278
   208
        return SDL_FALSE;
icculus@9278
   209
    }
icculus@9278
   210
icculus@9278
   211
    SDL_SetRenderDrawColor(screen, 0x00, 0x00, 0x00, SDL_ALPHA_OPAQUE);
icculus@9278
   212
    SDL_RenderClear(screen);
icculus@9278
   213
    SDL_RenderPresent(screen);
icculus@9278
   214
    SDL_RaiseWindow(window);
icculus@9278
   215
icculus@9278
   216
    /* Print info about the joystick we are watching */
icculus@9278
   217
    name = SDL_JoystickName(joystick);
icculus@9278
   218
    SDL_Log("Watching joystick %d: (%s)\n", SDL_JoystickInstanceID(joystick),
icculus@9278
   219
           name ? name : "Unknown Joystick");
icculus@9278
   220
    SDL_Log("Joystick has %d axes, %d hats, %d balls, and %d buttons\n",
icculus@9278
   221
           SDL_JoystickNumAxes(joystick), SDL_JoystickNumHats(joystick),
icculus@9278
   222
           SDL_JoystickNumBalls(joystick), SDL_JoystickNumButtons(joystick));
icculus@9278
   223
icculus@9278
   224
    /* Loop, getting joystick events! */
icculus@9278
   225
#ifdef __EMSCRIPTEN__
icculus@9278
   226
    emscripten_set_main_loop_arg(loop, joystick, 0, 1);
icculus@9278
   227
#else
icculus@9278
   228
    while (!done) {
icculus@9278
   229
        loop(joystick);
icculus@9278
   230
    }
icculus@9278
   231
#endif
icculus@9278
   232
slouken@6690
   233
    SDL_DestroyRenderer(screen);
philipp@9340
   234
    screen = NULL;
slouken@6690
   235
    SDL_DestroyWindow(window);
icculus@6730
   236
    return retval;
slouken@0
   237
}
slouken@0
   238
slouken@1895
   239
int
slouken@1895
   240
main(int argc, char *argv[])
slouken@0
   241
{
slouken@1895
   242
    const char *name;
slouken@6690
   243
    int i;
slouken@1895
   244
    SDL_Joystick *joystick;
slouken@0
   245
slime73@9876
   246
    SDL_SetHint(SDL_HINT_ACCELEROMETER_AS_JOYSTICK, "0");
slime73@9876
   247
aschiffler@7639
   248
    /* Enable standard application logging */
philipp@9922
   249
    SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
aschiffler@7639
   250
slouken@1895
   251
    /* Initialize SDL (Note: video is required to start event loop) */
slouken@6690
   252
    if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK) < 0) {
aschiffler@7639
   253
        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
slouken@1895
   254
        exit(1);
slouken@1895
   255
    }
slouken@0
   256
slouken@1895
   257
    /* Print information about the joysticks */
aschiffler@7639
   258
    SDL_Log("There are %d joysticks attached\n", SDL_NumJoysticks());
slouken@1895
   259
    for (i = 0; i < SDL_NumJoysticks(); ++i) {
slouken@6690
   260
        name = SDL_JoystickNameForIndex(i);
aschiffler@7639
   261
        SDL_Log("Joystick %d: %s\n", i, name ? name : "Unknown Joystick");
icculus@2200
   262
        joystick = SDL_JoystickOpen(i);
icculus@2200
   263
        if (joystick == NULL) {
aschiffler@7639
   264
            SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_JoystickOpen(%d) failed: %s\n", i,
slouken@2201
   265
                    SDL_GetError());
icculus@2200
   266
        } else {
icculus@6747
   267
            char guid[64];
icculus@9916
   268
            SDL_assert(SDL_JoystickFromInstanceID(SDL_JoystickInstanceID(joystick)) == joystick);
icculus@6747
   269
            SDL_JoystickGetGUIDString(SDL_JoystickGetGUID(joystick),
icculus@6747
   270
                                      guid, sizeof (guid));
aschiffler@7639
   271
            SDL_Log("       axes: %d\n", SDL_JoystickNumAxes(joystick));
aschiffler@7639
   272
            SDL_Log("      balls: %d\n", SDL_JoystickNumBalls(joystick));
aschiffler@7639
   273
            SDL_Log("       hats: %d\n", SDL_JoystickNumHats(joystick));
aschiffler@7639
   274
            SDL_Log("    buttons: %d\n", SDL_JoystickNumButtons(joystick));
aschiffler@7639
   275
            SDL_Log("instance id: %d\n", SDL_JoystickInstanceID(joystick));
aschiffler@7639
   276
            SDL_Log("       guid: %s\n", guid);
slouken@10597
   277
            SDL_Log("    VID/PID: 0x%.4x/0x%.4x\n", SDL_JoystickGetVendor(joystick), SDL_JoystickGetProduct(joystick));
icculus@2200
   278
            SDL_JoystickClose(joystick);
icculus@2200
   279
        }
slouken@1895
   280
    }
slouken@0
   281
slime73@9876
   282
#if defined(__ANDROID__) || defined(__IPHONEOS__)
slouken@7017
   283
    if (SDL_NumJoysticks() > 0) {
slouken@7017
   284
#else
slouken@6690
   285
    if (argv[1]) {
slouken@7017
   286
#endif
icculus@6731
   287
        SDL_bool reportederror = SDL_FALSE;
icculus@6730
   288
        SDL_bool keepGoing = SDL_TRUE;
icculus@6731
   289
        SDL_Event event;
philipp@8078
   290
        int device;
slime73@9876
   291
#if defined(__ANDROID__) || defined(__IPHONEOS__)
philipp@8078
   292
        device = 0;
slouken@7017
   293
#else
philipp@8078
   294
        device = atoi(argv[1]);
slouken@7017
   295
#endif
philipp@8078
   296
        joystick = SDL_JoystickOpen(device);
icculus@9916
   297
        if (joystick != NULL) {
icculus@9916
   298
            SDL_assert(SDL_JoystickFromInstanceID(SDL_JoystickInstanceID(joystick)) == joystick);
icculus@9916
   299
        }
philipp@8078
   300
icculus@6731
   301
        while ( keepGoing ) {
icculus@6731
   302
            if (joystick == NULL) {
icculus@6731
   303
                if ( !reportederror ) {
philipp@8078
   304
                    SDL_Log("Couldn't open joystick %d: %s\n", device, SDL_GetError());
icculus@6732
   305
                    keepGoing = SDL_FALSE;
icculus@6731
   306
                    reportederror = SDL_TRUE;
icculus@6731
   307
                }
icculus@6731
   308
            } else {
icculus@6731
   309
                reportederror = SDL_FALSE;
icculus@6731
   310
                keepGoing = WatchJoystick(joystick);
icculus@6731
   311
                SDL_JoystickClose(joystick);
icculus@6731
   312
            }
icculus@6731
   313
slouken@6736
   314
            joystick = NULL;
icculus@6730
   315
            if (keepGoing) {
aschiffler@7639
   316
                SDL_Log("Waiting for attach\n");
slouken@6736
   317
            }
slouken@6736
   318
            while (keepGoing) {
slouken@6736
   319
                SDL_WaitEvent(&event);
slouken@7017
   320
                if ((event.type == SDL_QUIT) || (event.type == SDL_FINGERDOWN)
slouken@7017
   321
                    || (event.type == SDL_MOUSEBUTTONDOWN)) {
slouken@6736
   322
                    keepGoing = SDL_FALSE;
slouken@6736
   323
                } else if (event.type == SDL_JOYDEVICEADDED) {
philipp@10707
   324
                    device = event.jdevice.which;
philipp@8078
   325
                    joystick = SDL_JoystickOpen(device);
icculus@9916
   326
                    if (joystick != NULL) {
icculus@9916
   327
                        SDL_assert(SDL_JoystickFromInstanceID(SDL_JoystickInstanceID(joystick)) == joystick);
icculus@9916
   328
                    }
slouken@6736
   329
                    break;
icculus@6731
   330
                }
icculus@6730
   331
            }
icculus@6731
   332
        }
icculus@6731
   333
    }
slouken@6690
   334
    SDL_QuitSubSystem(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK);
slouken@0
   335
philipp@8073
   336
    return 0;
slouken@0
   337
}
aschiffler@6771
   338
aschiffler@6771
   339
#else
aschiffler@6771
   340
aschiffler@6771
   341
int
aschiffler@6771
   342
main(int argc, char *argv[])
aschiffler@6771
   343
{
aschiffler@7639
   344
    SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL compiled without Joystick support.\n");
aschiffler@6771
   345
    exit(1);
aschiffler@6771
   346
}
aschiffler@6771
   347
aschiffler@6771
   348
#endif
slouken@10597
   349
slouken@10597
   350
/* vi: set ts=4 sw=4 expandtab: */