SDL: test/testgamecontroller.c@9406b7dd2f2d

     1 /*

     2   Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>

     4   This software is provided 'as-is', without any express or implied

     5   warranty.  In no event will the authors be held liable for any damages

     6   arising from the use of this software.

     8   Permission is granted to anyone to use this software for any purpose,

     9   including commercial applications, and to alter it and redistribute it

    10   freely.

    11 */

    13 /* Simple program to test the SDL game controller routines */

    15 #include <stdio.h>

    16 #include <stdlib.h>

    17 #include <string.h>

    19 #include "SDL.h"

    21 #ifndef SDL_JOYSTICK_DISABLED

    23 #ifdef __IPHONEOS__

    24 #define SCREEN_WIDTH    320

    25 #define SCREEN_HEIGHT    480

    26 #else

    27 #define SCREEN_WIDTH    640

    28 #define SCREEN_HEIGHT    480

    29 #endif

    31 #define MAX_NUM_AXES 6

    32 #define MAX_NUM_HATS 2

    34 static SDL_bool s_ForceQuit = SDL_FALSE;

    36 static void

    37 DrawRect(SDL_Renderer *r, const int x, const int y, const int w, const int h)

    38 {

    39     const SDL_Rect area = { x, y, w, h };

    40     SDL_RenderFillRect(r, &area);

    41 }

    43 static const char *

    44 ControllerAxisName(const SDL_GameControllerAxis axis)

    45 {

    46     switch (axis)

    47     {

    48         #define AXIS_CASE(ax) case SDL_CONTROLLER_AXIS_##ax: return #ax

    49         AXIS_CASE(INVALID);

    50         AXIS_CASE(LEFTX);

    51         AXIS_CASE(LEFTY);

    52         AXIS_CASE(RIGHTX);

    53         AXIS_CASE(RIGHTY);

    54         AXIS_CASE(TRIGGERLEFT);

    55         AXIS_CASE(TRIGGERRIGHT);

    56         #undef AXIS_CASE

    57         default: return "???";

    58     }

    59 }

    61 static const char *

    62 ControllerButtonName(const SDL_GameControllerButton button)

    63 {

    64     switch (button)

    65     {

    66         #define BUTTON_CASE(btn) case SDL_CONTROLLER_BUTTON_##btn: return #btn

    67         BUTTON_CASE(INVALID);

    68         BUTTON_CASE(A);

    69         BUTTON_CASE(B);

    70         BUTTON_CASE(X);

    71         BUTTON_CASE(Y);

    72         BUTTON_CASE(BACK);

    73         BUTTON_CASE(GUIDE);

    74         BUTTON_CASE(START);

    75         BUTTON_CASE(LEFTSTICK);

    76         BUTTON_CASE(RIGHTSTICK);

    77         BUTTON_CASE(LEFTSHOULDER);

    78         BUTTON_CASE(RIGHTSHOULDER);

    79         BUTTON_CASE(DPAD_UP);

    80         BUTTON_CASE(DPAD_DOWN);

    81         BUTTON_CASE(DPAD_LEFT);

    82         BUTTON_CASE(DPAD_RIGHT);

    83         #undef BUTTON_CASE

    84         default: return "???";

    85     }

    86 }

    88 void

    89 WatchGameController(SDL_GameController * gamecontroller)

    90 {

    91     const char *name = SDL_GameControllerName(gamecontroller);

    92     const char *basetitle = "Game Controller Test: ";

    93     const size_t titlelen = SDL_strlen(basetitle) + SDL_strlen(name) + 1;

    94     char *title = (char *)SDL_malloc(titlelen);

    95     SDL_Window *window = NULL;

    96     SDL_Renderer *screen = NULL;

    97     int done = 0;

    98     SDL_Event event;

    99     int i;

   101     if (title) {

   102         SDL_snprintf(title, titlelen, "%s%s", basetitle, name);

   103     }

   105     /* Create a window to display controller axis position */

   106     window = SDL_CreateWindow(title, SDL_WINDOWPOS_CENTERED,

   107                               SDL_WINDOWPOS_CENTERED, SCREEN_WIDTH,

   108                               SCREEN_HEIGHT, 0);

   109     if (window == NULL) {

   110         SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create window: %s\n", SDL_GetError());

   111         return;

   112     }

   114     screen = SDL_CreateRenderer(window, -1, 0);

   115     if (screen == NULL) {

   116         SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create renderer: %s\n", SDL_GetError());

   117         SDL_DestroyWindow(window);

   118         return;

   119     }

   121     SDL_SetRenderDrawColor(screen, 0x00, 0x00, 0x00, SDL_ALPHA_OPAQUE);

   122     SDL_RenderClear(screen);

   123     SDL_RenderPresent(screen);

   124     SDL_RaiseWindow(window);

   126     /* Print info about the controller we are watching */

   127     SDL_Log("Watching controller %s\n",  name ? name : "Unknown Controller");

   129     /* Loop, getting controller events! */

   130     while (!done) {

   131         /* blank screen, set up for drawing this frame. */

   132         SDL_SetRenderDrawColor(screen, 0x00, 0x00, 0x00, SDL_ALPHA_OPAQUE);

   133         SDL_RenderClear(screen);

   135         while (SDL_PollEvent(&event)) {

   136             switch (event.type) {

   137             case SDL_CONTROLLERAXISMOTION:

   138                 SDL_Log("Controller %d axis %d ('%s') value: %d\n",

   139                        event.caxis.which,

   140                        event.caxis.axis,

   141                        ControllerAxisName((SDL_GameControllerAxis)event.caxis.axis),

   142                        event.caxis.value);

   143                 break;

   144             case SDL_CONTROLLERBUTTONDOWN:

   145                 SDL_Log("Controller %d button %d ('%s') down\n",

   146                        event.cbutton.which, event.cbutton.button,

   147                        ControllerButtonName((SDL_GameControllerButton)event.cbutton.button));

   148                 break;

   149             case SDL_CONTROLLERBUTTONUP:

   150                 SDL_Log("Controller %d button %d ('%s') up\n",

   151                        event.cbutton.which, event.cbutton.button,

   152                        ControllerButtonName((SDL_GameControllerButton)event.cbutton.button));

   153                 break;

   154             case SDL_KEYDOWN:

   155                 if (event.key.keysym.sym != SDLK_ESCAPE) {

   156                     break;

   157                 }

   158                 /* Fall through to signal quit */

   159             case SDL_QUIT:

   160                 done = 1;

   161                 s_ForceQuit = SDL_TRUE;

   162                 break;

   163             default:

   164                 break;

   165             }

   166         }

   167         /* Update visual controller state */

   168         SDL_SetRenderDrawColor(screen, 0x00, 0xFF, 0x00, SDL_ALPHA_OPAQUE);

   169         for (i = 0; i <SDL_CONTROLLER_BUTTON_MAX; ++i) {

   170             if (SDL_GameControllerGetButton(gamecontroller, (SDL_GameControllerButton)i) == SDL_PRESSED) {

   171                 DrawRect(screen, i * 34, SCREEN_HEIGHT - 34, 32, 32);

   172             }

   173         }

   175         SDL_SetRenderDrawColor(screen, 0xFF, 0x00, 0x00, SDL_ALPHA_OPAQUE);

   176         for (i = 0; i < SDL_CONTROLLER_AXIS_MAX / 2; ++i) {

   177             /* Draw the X/Y axis */

   178             int x, y;

   179             x = (((int) SDL_GameControllerGetAxis(gamecontroller, (SDL_GameControllerAxis)(i * 2 + 0))) + 32768);

   180             x *= SCREEN_WIDTH;

   181             x /= 65535;

   182             if (x < 0) {

   183                 x = 0;

   184             } else if (x > (SCREEN_WIDTH - 16)) {

   185                 x = SCREEN_WIDTH - 16;

   186             }

   187             y = (((int) SDL_GameControllerGetAxis(gamecontroller, (SDL_GameControllerAxis)(i * 2 + 1))) + 32768);

   188             y *= SCREEN_HEIGHT;

   189             y /= 65535;

   190             if (y < 0) {

   191                 y = 0;

   192             } else if (y > (SCREEN_HEIGHT - 16)) {

   193                 y = SCREEN_HEIGHT - 16;

   194             }

   196             DrawRect(screen, x, y, 16, 16);

   197         }

   199         SDL_SetRenderDrawColor(screen, 0x00, 0x00, 0xFF, SDL_ALPHA_OPAQUE);

   201         SDL_RenderPresent(screen);

   203         if ( !done )

   204             done = SDL_GameControllerGetAttached( gamecontroller ) == 0;

   205     }

   207     SDL_DestroyRenderer(screen);

   208     SDL_DestroyWindow(window);

   209 }

   211 int

   212 main(int argc, char *argv[])

   213 {

   214     int i;

   215     int nController = 0;

   216     int retcode = 0;

   217     char guid[64];

   218     SDL_GameController *gamecontroller;

   220     /* Enable standard application logging */

   221 	SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);

   223     /* Initialize SDL (Note: video is required to start event loop) */

   224     if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK | SDL_INIT_GAMECONTROLLER ) < 0) {

   225         SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());

   226         return 1;

   227     }

   229     /* Print information about the controller */

   230     for (i = 0; i < SDL_NumJoysticks(); ++i) {

   231         const char *name;

   232         const char *description = "Joystick (not recognized as game controller)";

   234         SDL_JoystickGetGUIDString(SDL_JoystickGetDeviceGUID(i),

   235                                   guid, sizeof (guid));

   237         if ( SDL_IsGameController(i) )

   238         {

   239             nController++;

   240             name = SDL_GameControllerNameForIndex(i);

   241         } else {

   242             name = SDL_JoystickNameForIndex(i);

   243         }

   244         SDL_Log("%s %d: %s (guid %s)\n", description, i, name ? name : "Unknown", guid);

   245     }

   246     SDL_Log("There are %d game controller(s) attached (%d joystick(s))\n", nController, SDL_NumJoysticks());

   248     if (argv[1]) {

   249         int device = atoi(argv[1]);

   250         if (device >= SDL_NumJoysticks()) {

   251 			SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "%i is an invalid joystick index.\n", device);

   252             retcode = 1;

   253         } else {

   254             SDL_JoystickGetGUIDString(SDL_JoystickGetDeviceGUID(device),

   255                                       guid, sizeof (guid));

   256             SDL_Log("Attempting to open device %i, guid %s\n", device, guid);

   257             gamecontroller = SDL_GameControllerOpen(device);

   258             if (gamecontroller == NULL) {

   259                 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't open joystick %d: %s\n", device, SDL_GetError());

   260                 retcode = 1;

   261             } else {

   262                 WatchGameController(gamecontroller);

   263                 SDL_GameControllerClose(gamecontroller);

   264             }

   265         }

   266     }

   268     SDL_QuitSubSystem(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK | SDL_INIT_GAMECONTROLLER);

   270     return retcode;

   271 }

   273 #else

   275 int

   276 main(int argc, char *argv[])

   277 {

   278     SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL compiled without Joystick support.\n");

   279     exit(1);

   280 }

   282 #endif

author	Andreas Schiffler
	Wed, 14 Aug 2013 23:30:10 -0700
changeset 7639	9406b7dd2f2d
parent 7517	965d57022c01
child 7705	e70dc8b38f26
permissions	-rw-r--r--