controllermap.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "SDL.h"

Include dependency graph for controllermap.c:

Go to the source code of this file.

Data Structures
struct	SDL_GameControllerExtendedBind
struct	AxisState

Macros
#define	SCREEN_WIDTH   512
#define	SCREEN_HEIGHT   320
#define	MARKER_BUTTON   1
#define	MARKER_AXIS   2
#define	BINDING_COUNT   (SDL_CONTROLLER_BUTTON_MAX + SDL_CONTROLLER_BINDING_AXIS_MAX)

Enumerations

enum

{   SDL_CONTROLLER_BINDING_AXIS_LEFTX_NEGATIVE,   SDL_CONTROLLER_BINDING_AXIS_LEFTX_POSITIVE,   SDL_CONTROLLER_BINDING_AXIS_LEFTY_NEGATIVE,   SDL_CONTROLLER_BINDING_AXIS_LEFTY_POSITIVE,   SDL_CONTROLLER_BINDING_AXIS_RIGHTX_NEGATIVE,   SDL_CONTROLLER_BINDING_AXIS_RIGHTX_POSITIVE,   SDL_CONTROLLER_BINDING_AXIS_RIGHTY_NEGATIVE,   SDL_CONTROLLER_BINDING_AXIS_RIGHTY_POSITIVE,   SDL_CONTROLLER_BINDING_AXIS_TRIGGERLEFT,   SDL_CONTROLLER_BINDING_AXIS_TRIGGERRIGHT,   SDL_CONTROLLER_BINDING_AXIS_MAX }

Functions
SDL_Texture *	LoadTexture (SDL_Renderer *renderer, const char *file, SDL_bool transparent)
static int	StandardizeAxisValue (int nValue)
static void	SetCurrentBinding (int iBinding)
static SDL_bool	BBindingContainsBinding (const SDL_GameControllerExtendedBind *pBindingA, const SDL_GameControllerExtendedBind *pBindingB)
static void	ConfigureBinding (const SDL_GameControllerExtendedBind *pBinding)
static SDL_bool	BMergeAxisBindings (int iIndex)
static void	WatchJoystick (SDL_Joystick *joystick)
int	main (int argc, char *argv[])

Variables
struct {
int   x
int   y
double   angle
int   marker
}	s_arrBindingDisplay [BINDING_COUNT]
static int	s_arrBindingOrder [BINDING_COUNT]
static SDL_GameControllerExtendedBind	s_arrBindings [BINDING_COUNT]
static int	s_nNumAxes
static AxisState *	s_arrAxisState
static int	s_iCurrentBinding
static Uint32	s_unPendingAdvanceTime
static SDL_bool	s_bBindingComplete

Macro Definition Documentation

#define BINDING_COUNT   (SDL_CONTROLLER_BUTTON_MAX + SDL_CONTROLLER_BINDING_AXIS_MAX)

Definition at line 50 of file controllermap.c.

Referenced by SetCurrentBinding().

#define MARKER_AXIS   2

Definition at line 33 of file controllermap.c.

Referenced by WatchJoystick().

#define MARKER_BUTTON   1

Definition at line 32 of file controllermap.c.

Referenced by WatchJoystick().

#define SCREEN_HEIGHT   320

Definition at line 29 of file controllermap.c.

Referenced by WatchJoystick().

#define SCREEN_WIDTH   512

Definition at line 28 of file controllermap.c.

Referenced by WatchJoystick().

Enumeration Type Documentation

anonymous enum

Enumerator:

SDL_CONTROLLER_BINDING_AXIS_LEFTX_NEGATIVE
SDL_CONTROLLER_BINDING_AXIS_LEFTX_POSITIVE
SDL_CONTROLLER_BINDING_AXIS_LEFTY_NEGATIVE
SDL_CONTROLLER_BINDING_AXIS_LEFTY_POSITIVE
SDL_CONTROLLER_BINDING_AXIS_RIGHTX_NEGATIVE
SDL_CONTROLLER_BINDING_AXIS_RIGHTX_POSITIVE
SDL_CONTROLLER_BINDING_AXIS_RIGHTY_NEGATIVE
SDL_CONTROLLER_BINDING_AXIS_RIGHTY_POSITIVE
SDL_CONTROLLER_BINDING_AXIS_TRIGGERLEFT
SDL_CONTROLLER_BINDING_AXIS_TRIGGERRIGHT
SDL_CONTROLLER_BINDING_AXIS_MAX

Definition at line 35 of file controllermap.c.

{
    SDL_CONTROLLER_BINDING_AXIS_LEFTX_NEGATIVE,
    SDL_CONTROLLER_BINDING_AXIS_LEFTX_POSITIVE,
    SDL_CONTROLLER_BINDING_AXIS_LEFTY_NEGATIVE,
    SDL_CONTROLLER_BINDING_AXIS_LEFTY_POSITIVE,
    SDL_CONTROLLER_BINDING_AXIS_RIGHTX_NEGATIVE,
    SDL_CONTROLLER_BINDING_AXIS_RIGHTX_POSITIVE,
    SDL_CONTROLLER_BINDING_AXIS_RIGHTY_NEGATIVE,
    SDL_CONTROLLER_BINDING_AXIS_RIGHTY_POSITIVE,
    SDL_CONTROLLER_BINDING_AXIS_TRIGGERLEFT,
    SDL_CONTROLLER_BINDING_AXIS_TRIGGERRIGHT,
    SDL_CONTROLLER_BINDING_AXIS_MAX,
};

Function Documentation

static SDL_bool BBindingContainsBinding ( const SDL_GameControllerExtendedBind *  pBindingA, const SDL_GameControllerExtendedBind *  pBindingB  )

static

Definition at line 227 of file controllermap.c.

References SDL_GameControllerExtendedBind::axis, SDL_GameControllerExtendedBind::bindType, SDL_GameControllerExtendedBind::committed, SDL_CONTROLLER_BINDTYPE_AXIS, SDL_FALSE, SDL_max, SDL_memcmp, SDL_min, and SDL_GameControllerExtendedBind::value.

Referenced by ConfigureBinding().

{
    if (pBindingA->bindType != pBindingB->bindType)
    {
        return SDL_FALSE;
    }
    switch (pBindingA->bindType)
    {
    case SDL_CONTROLLER_BINDTYPE_AXIS:
        if (pBindingA->value.axis.axis != pBindingB->value.axis.axis) {
            return SDL_FALSE;
        }
        if (!pBindingA->committed) {
            return SDL_FALSE;
        }
        {
            int minA = SDL_min(pBindingA->value.axis.axis_min, pBindingA->value.axis.axis_max);
            int maxA = SDL_max(pBindingA->value.axis.axis_min, pBindingA->value.axis.axis_max);
            int minB = SDL_min(pBindingB->value.axis.axis_min, pBindingB->value.axis.axis_max);
            int maxB = SDL_max(pBindingB->value.axis.axis_min, pBindingB->value.axis.axis_max);
            return (minA <= minB && maxA >= maxB);
        }
        /* Not reached */
    default:
        return SDL_memcmp(pBindingA, pBindingB, sizeof(*pBindingA)) == 0;
    }
}

static SDL_bool BMergeAxisBindings ( int  iIndex )

static

Definition at line 336 of file controllermap.c.

References SDL_GameControllerExtendedBind::axis, SDL_GameControllerExtendedBind::bindType, SDL_CONTROLLER_BINDTYPE_AXIS, SDL_CONTROLLER_BINDTYPE_NONE, SDL_FALSE, SDL_TRUE, and SDL_GameControllerExtendedBind::value.

Referenced by WatchJoystick().

{
    SDL_GameControllerExtendedBind *pBindingA = &s_arrBindings[iIndex];
    SDL_GameControllerExtendedBind *pBindingB = &s_arrBindings[iIndex+1];
    if (pBindingA->bindType == SDL_CONTROLLER_BINDTYPE_AXIS &&
        pBindingB->bindType == SDL_CONTROLLER_BINDTYPE_AXIS &&
        pBindingA->value.axis.axis == pBindingB->value.axis.axis) {
        if (pBindingA->value.axis.axis_min == pBindingB->value.axis.axis_min) {
            pBindingA->value.axis.axis_min = pBindingA->value.axis.axis_max;
            pBindingA->value.axis.axis_max = pBindingB->value.axis.axis_max;
            pBindingB->bindType = SDL_CONTROLLER_BINDTYPE_NONE;
            return SDL_TRUE;
        }
    }
    return SDL_FALSE;
}

static void ConfigureBinding ( const SDL_GameControllerExtendedBind *  pBinding )

static

Definition at line 256 of file controllermap.c.

References SDL_GameControllerExtendedBind::axis, BBindingContainsBinding(), SDL_GameControllerExtendedBind::bindType, SDL_GameControllerExtendedBind::button, SDL_GameControllerExtendedBind::committed, SDL_GameControllerExtendedBind::hat, s_arrBindingOrder, s_iCurrentBinding, s_unPendingAdvanceTime, SDL_arraysize, SDL_CONTROLLER_BINDTYPE_AXIS, SDL_CONTROLLER_BINDTYPE_BUTTON, SDL_CONTROLLER_BINDTYPE_HAT, SDL_CONTROLLER_BINDTYPE_NONE, SDL_CONTROLLER_BUTTON_A, SDL_CONTROLLER_BUTTON_B, SDL_CONTROLLER_BUTTON_DPAD_DOWN, SDL_CONTROLLER_BUTTON_DPAD_LEFT, SDL_CONTROLLER_BUTTON_DPAD_RIGHT, SDL_CONTROLLER_BUTTON_DPAD_UP, SDL_CONTROLLER_BUTTON_MAX, SDL_GetTicks(), SDL_Log, SetCurrentBinding(), and SDL_GameControllerExtendedBind::value.

Referenced by WatchJoystick().

{
    SDL_GameControllerExtendedBind *pCurrent;
    int iIndex;
    int iCurrentElement = s_arrBindingOrder[s_iCurrentBinding];

    /* Do we already have this binding? */
    for (iIndex = 0; iIndex < SDL_arraysize(s_arrBindings); ++iIndex) {
        pCurrent = &s_arrBindings[iIndex];
        if (BBindingContainsBinding(pCurrent, pBinding)) {
            if (iIndex == SDL_CONTROLLER_BUTTON_A && iCurrentElement != SDL_CONTROLLER_BUTTON_B) {
                /* Skip to the next binding */
                SetCurrentBinding(s_iCurrentBinding + 1);
                return;
            }

            if (iIndex == SDL_CONTROLLER_BUTTON_B) {
                /* Go back to the previous binding */
                SetCurrentBinding(s_iCurrentBinding - 1);
                return;
            }

            /* Already have this binding, ignore it */
            return;
        }
    }

#ifdef DEBUG_CONTROLLERMAP
    switch ( pBinding->bindType )
    {
    case SDL_CONTROLLER_BINDTYPE_NONE:
            break;
    case SDL_CONTROLLER_BINDTYPE_BUTTON:
            SDL_Log("Configuring button binding for button %d\n", pBinding->value.button);
            break;
    case SDL_CONTROLLER_BINDTYPE_AXIS:
            SDL_Log("Configuring axis binding for axis %d %d/%d committed = %s\n", pBinding->value.axis.axis, pBinding->value.axis.axis_min, pBinding->value.axis.axis_max, pBinding->committed ? "true" : "false");
            break;
    case SDL_CONTROLLER_BINDTYPE_HAT:
            SDL_Log("Configuring hat binding for hat %d %d\n", pBinding->value.hat.hat, pBinding->value.hat.hat_mask);
            break;
    }
#endif /* DEBUG_CONTROLLERMAP */

    /* Should the new binding override the existing one? */
    pCurrent = &s_arrBindings[iCurrentElement];
    if (pCurrent->bindType != SDL_CONTROLLER_BINDTYPE_NONE) {
        SDL_bool bNativeDPad, bCurrentDPad;
        SDL_bool bNativeAxis, bCurrentAxis;
        
        bNativeDPad = (iCurrentElement == SDL_CONTROLLER_BUTTON_DPAD_UP ||
                       iCurrentElement == SDL_CONTROLLER_BUTTON_DPAD_DOWN ||
                       iCurrentElement == SDL_CONTROLLER_BUTTON_DPAD_LEFT ||
                       iCurrentElement == SDL_CONTROLLER_BUTTON_DPAD_RIGHT);
        bCurrentDPad = (pCurrent->bindType == SDL_CONTROLLER_BINDTYPE_HAT);
        if (bNativeDPad && bCurrentDPad) {
            /* We already have a binding of the type we want, ignore the new one */
            return;
        }

        bNativeAxis = (iCurrentElement >= SDL_CONTROLLER_BUTTON_MAX);
        bCurrentAxis = (pCurrent->bindType == SDL_CONTROLLER_BINDTYPE_AXIS);
        if (bNativeAxis == bCurrentAxis &&
            (pBinding->bindType != SDL_CONTROLLER_BINDTYPE_AXIS ||
             pBinding->value.axis.axis != pCurrent->value.axis.axis)) {
            /* We already have a binding of the type we want, ignore the new one */
            return;
        }
    }

    *pCurrent = *pBinding;

    if (pBinding->committed) {
        s_unPendingAdvanceTime = SDL_GetTicks();
    } else {
        s_unPendingAdvanceTime = 0;
    }
}

SDL_Texture* LoadTexture	(	SDL_Renderer *	renderer,
		const char *	file,
		SDL_bool	transparent
	)

Definition at line 155 of file controllermap.c.

References SDL_Surface::format, NULL, SDL_PixelFormat::palette, SDL_Surface::pixels, SDL_CreateTextureFromSurface, SDL_FreeSurface, SDL_GetError, SDL_LoadBMP, SDL_LOG_CATEGORY_APPLICATION, SDL_LogError, SDL_SetColorKey, and SDL_TRUE.

Referenced by main(), WatchGameController(), and WatchJoystick().

{
    SDL_Surface *temp;
    SDL_Texture *texture;

    /* Load the sprite image */
    temp = SDL_LoadBMP(file);
    if (temp == NULL) {
        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't load %s: %s", file, SDL_GetError());
        return NULL;
    }

    /* Set transparent pixel as the pixel at (0,0) */
    if (transparent) {
        if (temp->format->palette) {
            SDL_SetColorKey(temp, SDL_TRUE, *(Uint8 *) temp->pixels);
        }
    }

    /* Create textures from the image */
    texture = SDL_CreateTextureFromSurface(renderer, temp);
    if (!texture) {
        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create texture: %s\n", SDL_GetError());
        SDL_FreeSurface(temp);
        return NULL;
    }
    SDL_FreeSurface(temp);

    /* We're ready to roll. :) */
    return texture;
}

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

Definition at line 704 of file controllermap.c.

References device, i, main, NULL, SDL_GetError, SDL_Init, SDL_INIT_JOYSTICK, SDL_INIT_VIDEO, SDL_JoystickClose, SDL_JoystickGetGUID, SDL_JoystickGetGUIDString, SDL_JoystickGetProduct, SDL_JoystickGetVendor, SDL_JoystickInstanceID, SDL_JoystickNameForIndex, SDL_JoystickNumAxes, SDL_JoystickNumBalls, SDL_JoystickNumButtons, SDL_JoystickNumHats, SDL_JoystickOpen, SDL_Log, SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO, SDL_LogError, SDL_LogSetPriority, SDL_NumJoysticks, SDL_QuitSubSystem, and WatchJoystick().

{
    const char *name;
    int i;
    SDL_Joystick *joystick;

    /* 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);
    }

    /* Print information about the joysticks */
    SDL_Log("There are %d joysticks attached\n", SDL_NumJoysticks());
    for (i = 0; i < SDL_NumJoysticks(); ++i) {
        name = SDL_JoystickNameForIndex(i);
        SDL_Log("Joystick %d: %s\n", i, name ? name : "Unknown Joystick");
        joystick = SDL_JoystickOpen(i);
        if (joystick == NULL) {
            SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_JoystickOpen(%d) failed: %s\n", i,
                    SDL_GetError());
        } else {
            char guid[64];
            SDL_JoystickGetGUIDString(SDL_JoystickGetGUID(joystick),
                                      guid, sizeof (guid));
            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));
            SDL_JoystickClose(joystick);
        }
    }

#ifdef __ANDROID__
    if (SDL_NumJoysticks() > 0) {
#else
    if (argv[1]) {
#endif
        int device;
#ifdef __ANDROID__
        device = 0;
#else
        device = atoi(argv[1]);
#endif
        joystick = SDL_JoystickOpen(device);
        if (joystick == NULL) {
            SDL_Log("Couldn't open joystick %d: %s\n", device, SDL_GetError());
        } else {
            WatchJoystick(joystick);
            SDL_JoystickClose(joystick);
        }
    }
    else {
        SDL_Log("\n\nUsage: ./controllermap number\nFor example: ./controllermap 0\nOr: ./controllermap 0 >> gamecontrollerdb.txt");
    }
    SDL_QuitSubSystem(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK);

    return 0;
}

static void SetCurrentBinding ( int  iBinding )

static

Definition at line 200 of file controllermap.c.

References BINDING_COUNT, AxisState::m_nFarthestValue, AxisState::m_nStartingValue, s_arrBindingOrder, s_bBindingComplete, s_iCurrentBinding, s_nNumAxes, s_unPendingAdvanceTime, SDL_TRUE, and SDL_zerop.

Referenced by ConfigureBinding(), and WatchJoystick().

{
    int iIndex;
    SDL_GameControllerExtendedBind *pBinding;

    if (iBinding < 0) {
        return;
    }

    if (iBinding == BINDING_COUNT) {
        s_bBindingComplete = SDL_TRUE;
        return;
    }

    s_iCurrentBinding = iBinding;

    pBinding = &s_arrBindings[s_arrBindingOrder[s_iCurrentBinding]];
    SDL_zerop(pBinding);

    for (iIndex = 0; iIndex < s_nNumAxes; ++iIndex) {
        s_arrAxisState[iIndex].m_nFarthestValue = s_arrAxisState[iIndex].m_nStartingValue;
    }

    s_unPendingAdvanceTime = 0;
}

static int StandardizeAxisValue ( int  nValue )

static

Definition at line 188 of file controllermap.c.

References SDL_JOYSTICK_AXIS_MAX, and SDL_JOYSTICK_AXIS_MIN.

Referenced by WatchJoystick().

{
    if (nValue > SDL_JOYSTICK_AXIS_MAX/2) {
        return SDL_JOYSTICK_AXIS_MAX;
    } else if (nValue < SDL_JOYSTICK_AXIS_MIN/2) {
        return SDL_JOYSTICK_AXIS_MIN;
    } else {
        return 0;
    }
}

static void WatchJoystick ( SDL_Joystick *  joystick )

static

Definition at line 354 of file controllermap.c.

References axis, SDL_GameControllerExtendedBind::axis, SDL_JoyAxisEvent::axis, background, SDL_GameControllerExtendedBind::bindType, BMergeAxisBindings(), button, SDL_GameControllerExtendedBind::button, SDL_JoyButtonEvent::button, SDL_GameControllerExtendedBind::committed, ConfigureBinding(), done, SDL_Rect::h, SDL_GameControllerExtendedBind::hat, SDL_JoyHatEvent::hat, SDL_Event::jaxis, SDL_Event::jbutton, SDL_Event::jhat, SDL_Event::key, SDL_KeyboardEvent::keysym, LoadTexture(), AxisState::m_bMoving, AxisState::m_nFarthestValue, AxisState::m_nStartingValue, MARKER_AXIS, MARKER_BUTTON, NULL, s_arrBindingDisplay, s_arrBindingOrder, s_bBindingComplete, s_iCurrentBinding, s_nNumAxes, s_unPendingAdvanceTime, screen, SCREEN_HEIGHT, SCREEN_WIDTH, SDL_abs, SDL_ALPHA_OPAQUE, SDL_arraysize, SDL_assert, SDL_calloc, SDL_CONTROLLER_AXIS_LEFTX, SDL_CONTROLLER_AXIS_LEFTY, SDL_CONTROLLER_AXIS_RIGHTX, SDL_CONTROLLER_AXIS_RIGHTY, SDL_CONTROLLER_AXIS_TRIGGERLEFT, SDL_CONTROLLER_AXIS_TRIGGERRIGHT, SDL_CONTROLLER_BINDING_AXIS_LEFTX_NEGATIVE, SDL_CONTROLLER_BINDING_AXIS_LEFTX_POSITIVE, SDL_CONTROLLER_BINDING_AXIS_LEFTY_NEGATIVE, SDL_CONTROLLER_BINDING_AXIS_LEFTY_POSITIVE, SDL_CONTROLLER_BINDING_AXIS_RIGHTX_NEGATIVE, SDL_CONTROLLER_BINDING_AXIS_RIGHTX_POSITIVE, SDL_CONTROLLER_BINDING_AXIS_RIGHTY_NEGATIVE, SDL_CONTROLLER_BINDING_AXIS_RIGHTY_POSITIVE, SDL_CONTROLLER_BINDING_AXIS_TRIGGERLEFT, SDL_CONTROLLER_BINDING_AXIS_TRIGGERRIGHT, SDL_CONTROLLER_BINDTYPE_AXIS, SDL_CONTROLLER_BINDTYPE_BUTTON, SDL_CONTROLLER_BINDTYPE_HAT, SDL_CONTROLLER_BINDTYPE_NONE, SDL_CONTROLLER_BUTTON_MAX, SDL_CreateRenderer, SDL_CreateWindow, SDL_Delay, SDL_DestroyRenderer, SDL_DestroyWindow, SDL_FALSE, SDL_FINGERDOWN, SDL_FLIP_NONE, SDL_free, SDL_GameControllerGetStringForAxis, SDL_GameControllerGetStringForButton, SDL_GetError, SDL_GetPlatform, SDL_GetTicks(), SDL_HAT_CENTERED, SDL_isspace, SDL_JOYAXISMOTION, SDL_JOYBALLMOTION, SDL_JOYBUTTONDOWN, SDL_JOYDEVICEREMOVED, SDL_JOYHATMOTION, SDL_JOYSTICK_AXIS_MAX, SDL_JOYSTICK_AXIS_MIN, SDL_JoystickGetAxisInitialState, SDL_JoystickGetGUID, SDL_JoystickGetGUIDString, SDL_JoystickInstanceID, SDL_JoystickName, SDL_JoystickNumAxes, SDL_JoystickNumBalls, SDL_JoystickNumButtons, SDL_JoystickNumHats, SDL_KEYDOWN, SDL_Log, SDL_LOG_CATEGORY_APPLICATION, SDL_LogError, SDL_memmove, SDL_MOUSEBUTTONDOWN, SDL_PollEvent, SDL_QueryTexture, SDL_QUIT, SDL_RaiseWindow, SDL_RenderClear, SDL_RenderCopy, SDL_RenderCopyEx, SDL_RenderPresent, SDL_RenderSetLogicalSize, SDL_SetRenderDrawColor, SDL_SetTextureAlphaMod, SDL_SetTextureColorMod, SDL_snprintf, SDL_strchr, SDL_strlcat, SDL_strlcpy, SDL_strlen, SDL_TRUE, SDL_WINDOWPOS_CENTERED, SDL_zero, SDLK_AC_BACK, SDLK_BACKSPACE, SDLK_ESCAPE, SDLK_SPACE, SetCurrentBinding(), StandardizeAxisValue(), SDL_Keysym::sym, SDL_Event::type, SDL_GameControllerExtendedBind::value, SDL_JoyHatEvent::value, SDL_Rect::w, SDL_JoyAxisEvent::which, SDL_JoyHatEvent::which, SDL_JoyButtonEvent::which, SDL_Rect::x, and SDL_Rect::y.

Referenced by main().

{
    SDL_Window *window = NULL;
    SDL_Renderer *screen = NULL;
    SDL_Texture *background, *button, *axis, *marker;
    const char *name = NULL;
    SDL_bool done = SDL_FALSE;
    SDL_Event event;
    SDL_Rect dst;
    Uint8 alpha=200, alpha_step = -1;
    Uint32 alpha_ticks = 0;
    SDL_JoystickID nJoystickID;
    int iIndex;

    /* Create a window to display joystick axis position */
    window = SDL_CreateWindow("Game Controller Map", 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;
    }

    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;
    }
    
    background = LoadTexture(screen, "controllermap.bmp", SDL_FALSE);
    button = LoadTexture(screen, "button.bmp", SDL_TRUE);
    axis = LoadTexture(screen, "axis.bmp", SDL_TRUE);
    SDL_RaiseWindow(window);

    /* scale for platforms that don't give you the window size you asked for. */
    SDL_RenderSetLogicalSize(screen, SCREEN_WIDTH, SCREEN_HEIGHT);

    /* Print info about the joystick we are watching */
    name = SDL_JoystickName(joystick);
    SDL_Log("Watching joystick %d: (%s)\n", SDL_JoystickInstanceID(joystick),
           name ? name : "Unknown Joystick");
    SDL_Log("Joystick has %d axes, %d hats, %d balls, and %d buttons\n",
           SDL_JoystickNumAxes(joystick), SDL_JoystickNumHats(joystick),
           SDL_JoystickNumBalls(joystick), SDL_JoystickNumButtons(joystick));
    
    SDL_Log("\n\n\
    ====================================================================================\n\
    Press the buttons on your controller when indicated\n\
    (Your controller may look different than the picture)\n\
    If you want to correct a mistake, press backspace or the back button on your device\n\
    To skip a button, press SPACE or click/touch the screen\n\
    To exit, press ESC\n\
    ====================================================================================\n");

    nJoystickID = SDL_JoystickInstanceID(joystick);

    s_nNumAxes = SDL_JoystickNumAxes(joystick);
    s_arrAxisState = (AxisState *)SDL_calloc(s_nNumAxes, sizeof(*s_arrAxisState));
    for (iIndex = 0; iIndex < s_nNumAxes; ++iIndex) {
        AxisState *pAxisState = &s_arrAxisState[iIndex];
        Sint16 nInitialValue;
        pAxisState->m_bMoving = SDL_JoystickGetAxisInitialState(joystick, iIndex, &nInitialValue);
        pAxisState->m_nStartingValue = nInitialValue;
        pAxisState->m_nFarthestValue = nInitialValue;
    }

    /* Loop, getting joystick events! */
    while (!done && !s_bBindingComplete) {
        int iElement = s_arrBindingOrder[s_iCurrentBinding];

        switch (s_arrBindingDisplay[iElement].marker) {
            case MARKER_AXIS:
                marker = axis;
                break;
            case MARKER_BUTTON:
                marker = button;
                break;
            default:
                break;
        }
        
        dst.x = s_arrBindingDisplay[iElement].x;
        dst.y = s_arrBindingDisplay[iElement].y;
        SDL_QueryTexture(marker, NULL, NULL, &dst.w, &dst.h);

        if (SDL_GetTicks() - alpha_ticks > 5) {
            alpha_ticks = SDL_GetTicks();
            alpha += alpha_step;
            if (alpha == 255) {
                alpha_step = -1;
            }
            if (alpha < 128) {
                alpha_step = 1;
            }
        }

        SDL_SetRenderDrawColor(screen, 0xFF, 0xFF, 0xFF, SDL_ALPHA_OPAQUE);
        SDL_RenderClear(screen);
        SDL_RenderCopy(screen, background, NULL, NULL);
        SDL_SetTextureAlphaMod(marker, alpha);
        SDL_SetTextureColorMod(marker, 10, 255, 21);
        SDL_RenderCopyEx(screen, marker, NULL, &dst, s_arrBindingDisplay[iElement].angle, NULL, SDL_FLIP_NONE);
        SDL_RenderPresent(screen);
            
        while (SDL_PollEvent(&event) > 0) {
            switch (event.type) {
            case SDL_JOYDEVICEREMOVED:
                if (event.jaxis.which == nJoystickID) {
                    done = SDL_TRUE;
                }
                break;
            case SDL_JOYAXISMOTION:
                if (event.jaxis.which == nJoystickID) {
                    AxisState *pAxisState = &s_arrAxisState[event.jaxis.axis];
                    int nValue = event.jaxis.value;
                    int nCurrentDistance, nFarthestDistance;
                    if (!pAxisState->m_bMoving) {
                        pAxisState->m_bMoving = SDL_TRUE;
                        pAxisState->m_nStartingValue = nValue;
                        pAxisState->m_nFarthestValue = nValue;
                    }
                    nCurrentDistance = SDL_abs(nValue - pAxisState->m_nStartingValue);
                    nFarthestDistance = SDL_abs(pAxisState->m_nFarthestValue - pAxisState->m_nStartingValue);
                    if (nCurrentDistance > nFarthestDistance) {
                        pAxisState->m_nFarthestValue = nValue;
                        nFarthestDistance = SDL_abs(pAxisState->m_nFarthestValue - pAxisState->m_nStartingValue);
                    }

#ifdef DEBUG_CONTROLLERMAP
                    SDL_Log("AXIS %d nValue %d nCurrentDistance %d nFarthestDistance %d\n", event.jaxis.axis, nValue, nCurrentDistance, nFarthestDistance);
#endif
                    if (nFarthestDistance >= 16000) {
                        /* If we've gone out far enough and started to come back, let's bind this axis */
                        SDL_bool bCommitBinding = (nCurrentDistance <= 10000) ? SDL_TRUE : SDL_FALSE;
                        SDL_GameControllerExtendedBind binding;
                        SDL_zero(binding);
                        binding.bindType = SDL_CONTROLLER_BINDTYPE_AXIS;
                        binding.value.axis.axis = event.jaxis.axis;
                        binding.value.axis.axis_min = StandardizeAxisValue(pAxisState->m_nStartingValue);
                        binding.value.axis.axis_max = StandardizeAxisValue(pAxisState->m_nFarthestValue);
                        binding.committed = bCommitBinding;
                        ConfigureBinding(&binding);
                    }
                }
                break;
            case SDL_JOYHATMOTION:
                if (event.jhat.which == nJoystickID) {
                    if (event.jhat.value != SDL_HAT_CENTERED) {
                        SDL_GameControllerExtendedBind binding;

#ifdef DEBUG_CONTROLLERMAP
                        SDL_Log("HAT %d %d\n", event.jhat.hat, event.jhat.value);
#endif
                        SDL_zero(binding);
                        binding.bindType = SDL_CONTROLLER_BINDTYPE_HAT;
                        binding.value.hat.hat = event.jhat.hat;
                        binding.value.hat.hat_mask = event.jhat.value;
                        binding.committed = SDL_TRUE;
                        ConfigureBinding(&binding);
                    }
                }
                break;
            case SDL_JOYBALLMOTION:
                break;
            case SDL_JOYBUTTONDOWN:
                if (event.jbutton.which == nJoystickID) {
                    SDL_GameControllerExtendedBind binding;

#ifdef DEBUG_CONTROLLERMAP
                    SDL_Log("BUTTON %d\n", event.jbutton.button);
#endif
                    SDL_zero(binding);
                    binding.bindType = SDL_CONTROLLER_BINDTYPE_BUTTON;
                    binding.value.button = event.jbutton.button;
                    binding.committed = SDL_TRUE;
                    ConfigureBinding(&binding);
                }
                break;
            case SDL_FINGERDOWN:
            case SDL_MOUSEBUTTONDOWN:
                /* Skip this step */
                SetCurrentBinding(s_iCurrentBinding + 1);
                break;
            case SDL_KEYDOWN:
                if (event.key.keysym.sym == SDLK_BACKSPACE || event.key.keysym.sym == SDLK_AC_BACK) {
                    SetCurrentBinding(s_iCurrentBinding - 1);
                    break;
                }
                if (event.key.keysym.sym == SDLK_SPACE) {
                    SetCurrentBinding(s_iCurrentBinding + 1);
                    break;
                }

                if ((event.key.keysym.sym != SDLK_ESCAPE)) {
                    break;
                }
                /* Fall through to signal quit */
            case SDL_QUIT:
                done = SDL_TRUE;
                break;
            default:
                break;
            }
        }

        SDL_Delay(15);

        /* Wait 100 ms for joystick events to stop coming in,
           in case a controller sends multiple events for a single control (e.g. axis and button for trigger)
        */
        if (s_unPendingAdvanceTime && SDL_GetTicks() - s_unPendingAdvanceTime >= 100) {
            SetCurrentBinding(s_iCurrentBinding + 1);
        }
    }

    if (s_bBindingComplete) {
        char mapping[1024];
        char trimmed_name[128];
        char *spot;
        int iIndex;
        char pszElement[12];

        SDL_strlcpy(trimmed_name, name, SDL_arraysize(trimmed_name));
        while (SDL_isspace(trimmed_name[0])) {
            SDL_memmove(&trimmed_name[0], &trimmed_name[1], SDL_strlen(trimmed_name));
        }
        while (trimmed_name[0] && SDL_isspace(trimmed_name[SDL_strlen(trimmed_name) - 1])) {
            trimmed_name[SDL_strlen(trimmed_name) - 1] = '\0';
        }
        while ((spot = SDL_strchr(trimmed_name, ',')) != NULL) {
            SDL_memmove(spot, spot + 1, SDL_strlen(spot));
        }

        /* Initialize mapping with GUID and name */
        SDL_JoystickGetGUIDString(SDL_JoystickGetGUID(joystick), mapping, SDL_arraysize(mapping));
        SDL_strlcat(mapping, ",", SDL_arraysize(mapping));
        SDL_strlcat(mapping, trimmed_name, SDL_arraysize(mapping));
        SDL_strlcat(mapping, ",", SDL_arraysize(mapping));
        SDL_strlcat(mapping, "platform:", SDL_arraysize(mapping));
        SDL_strlcat(mapping, SDL_GetPlatform(), SDL_arraysize(mapping));
        SDL_strlcat(mapping, ",", SDL_arraysize(mapping));

        for (iIndex = 0; iIndex < SDL_arraysize(s_arrBindings); ++iIndex) {
            SDL_GameControllerExtendedBind *pBinding = &s_arrBindings[iIndex];
            if (pBinding->bindType == SDL_CONTROLLER_BINDTYPE_NONE) {
                continue;
            }

            if (iIndex < SDL_CONTROLLER_BUTTON_MAX) {
                SDL_GameControllerButton eButton = (SDL_GameControllerButton)iIndex;
                SDL_strlcat(mapping, SDL_GameControllerGetStringForButton(eButton), SDL_arraysize(mapping));
            } else {
                const char *pszAxisName;
                switch (iIndex - SDL_CONTROLLER_BUTTON_MAX) {
                case SDL_CONTROLLER_BINDING_AXIS_LEFTX_NEGATIVE:
                    if (!BMergeAxisBindings(iIndex)) {
                        SDL_strlcat(mapping, "-", SDL_arraysize(mapping));
                    }
                    pszAxisName = SDL_GameControllerGetStringForAxis(SDL_CONTROLLER_AXIS_LEFTX);
                    break;
                case SDL_CONTROLLER_BINDING_AXIS_LEFTX_POSITIVE:
                    SDL_strlcat(mapping, "+", SDL_arraysize(mapping));
                    pszAxisName = SDL_GameControllerGetStringForAxis(SDL_CONTROLLER_AXIS_LEFTX);
                    break;
                case SDL_CONTROLLER_BINDING_AXIS_LEFTY_NEGATIVE:
                    if (!BMergeAxisBindings(iIndex)) {
                        SDL_strlcat(mapping, "-", SDL_arraysize(mapping));
                    }
                    pszAxisName = SDL_GameControllerGetStringForAxis(SDL_CONTROLLER_AXIS_LEFTY);
                    break;
                case SDL_CONTROLLER_BINDING_AXIS_LEFTY_POSITIVE:
                    SDL_strlcat(mapping, "+", SDL_arraysize(mapping));
                    pszAxisName = SDL_GameControllerGetStringForAxis(SDL_CONTROLLER_AXIS_LEFTY);
                    break;
                case SDL_CONTROLLER_BINDING_AXIS_RIGHTX_NEGATIVE:
                    if (!BMergeAxisBindings(iIndex)) {
                        SDL_strlcat(mapping, "-", SDL_arraysize(mapping));
                    }
                    pszAxisName = SDL_GameControllerGetStringForAxis(SDL_CONTROLLER_AXIS_RIGHTX);
                    break;
                case SDL_CONTROLLER_BINDING_AXIS_RIGHTX_POSITIVE:
                    SDL_strlcat(mapping, "+", SDL_arraysize(mapping));
                    pszAxisName = SDL_GameControllerGetStringForAxis(SDL_CONTROLLER_AXIS_RIGHTX);
                    break;
                case SDL_CONTROLLER_BINDING_AXIS_RIGHTY_NEGATIVE:
                    if (!BMergeAxisBindings(iIndex)) {
                        SDL_strlcat(mapping, "-", SDL_arraysize(mapping));
                    }
                    pszAxisName = SDL_GameControllerGetStringForAxis(SDL_CONTROLLER_AXIS_RIGHTY);
                    break;
                case SDL_CONTROLLER_BINDING_AXIS_RIGHTY_POSITIVE:
                    SDL_strlcat(mapping, "+", SDL_arraysize(mapping));
                    pszAxisName = SDL_GameControllerGetStringForAxis(SDL_CONTROLLER_AXIS_RIGHTY);
                    break;
                case SDL_CONTROLLER_BINDING_AXIS_TRIGGERLEFT:
                    pszAxisName = SDL_GameControllerGetStringForAxis(SDL_CONTROLLER_AXIS_TRIGGERLEFT);
                    break;
                case SDL_CONTROLLER_BINDING_AXIS_TRIGGERRIGHT:
                    pszAxisName = SDL_GameControllerGetStringForAxis(SDL_CONTROLLER_AXIS_TRIGGERRIGHT);
                    break;
                }
                SDL_strlcat(mapping, pszAxisName, SDL_arraysize(mapping));
            }
            SDL_strlcat(mapping, ":", SDL_arraysize(mapping));

            pszElement[0] = '\0';
            switch (pBinding->bindType) {
            case SDL_CONTROLLER_BINDTYPE_BUTTON:
                SDL_snprintf(pszElement, sizeof(pszElement), "b%d", pBinding->value.button);
                break;
            case SDL_CONTROLLER_BINDTYPE_AXIS:
                if (pBinding->value.axis.axis_min == 0 && pBinding->value.axis.axis_max == SDL_JOYSTICK_AXIS_MIN) {
                    /* The negative half axis */
                    SDL_snprintf(pszElement, sizeof(pszElement), "-a%d", pBinding->value.axis.axis);
                } else if (pBinding->value.axis.axis_min == 0 && pBinding->value.axis.axis_max == SDL_JOYSTICK_AXIS_MAX) {
                    /* The positive half axis */
                    SDL_snprintf(pszElement, sizeof(pszElement), "+a%d", pBinding->value.axis.axis);
                } else {
                    SDL_snprintf(pszElement, sizeof(pszElement), "a%d", pBinding->value.axis.axis);
                    if (pBinding->value.axis.axis_min > pBinding->value.axis.axis_max) {
                        /* Invert the axis */
                        SDL_strlcat(pszElement, "~", SDL_arraysize(pszElement));
                    }
                }
                break;
            case SDL_CONTROLLER_BINDTYPE_HAT:
                SDL_snprintf(pszElement, sizeof(pszElement), "h%d.%d", pBinding->value.hat.hat, pBinding->value.hat.hat_mask);
                break;
            default:
                SDL_assert(!"Unknown bind type");
                break;
            }
            SDL_strlcat(mapping, pszElement, SDL_arraysize(mapping));
            SDL_strlcat(mapping, ",", SDL_arraysize(mapping));
        }

        SDL_Log("Mapping:\n\n%s\n\n", mapping);
        /* Print to stdout as well so the user can cat the output somewhere */
        printf("%s\n", mapping);
    }

    SDL_free(s_arrAxisState);
    s_arrAxisState = NULL;
    
    SDL_DestroyRenderer(screen);
    SDL_DestroyWindow(window);
}

Variable Documentation

double angle

Definition at line 55 of file controllermap.c.

int marker

Definition at line 56 of file controllermap.c.

AxisState* s_arrAxisState

static

Definition at line 148 of file controllermap.c.

struct { ... } s_arrBindingDisplay[BINDING_COUNT]

Referenced by WatchJoystick().

int s_arrBindingOrder[BINDING_COUNT]

static

Initial value:

 {
    SDL_CONTROLLER_BUTTON_A,
    SDL_CONTROLLER_BUTTON_B,
    SDL_CONTROLLER_BUTTON_Y,
    SDL_CONTROLLER_BUTTON_X,
    SDL_CONTROLLER_BUTTON_MAX + SDL_CONTROLLER_BINDING_AXIS_LEFTX_NEGATIVE,
    SDL_CONTROLLER_BUTTON_MAX + SDL_CONTROLLER_BINDING_AXIS_LEFTX_POSITIVE,
    SDL_CONTROLLER_BUTTON_MAX + SDL_CONTROLLER_BINDING_AXIS_LEFTY_NEGATIVE,
    SDL_CONTROLLER_BUTTON_MAX + SDL_CONTROLLER_BINDING_AXIS_LEFTY_POSITIVE,
    SDL_CONTROLLER_BUTTON_LEFTSTICK,
    SDL_CONTROLLER_BUTTON_MAX + SDL_CONTROLLER_BINDING_AXIS_RIGHTX_NEGATIVE,
    SDL_CONTROLLER_BUTTON_MAX + SDL_CONTROLLER_BINDING_AXIS_RIGHTX_POSITIVE,
    SDL_CONTROLLER_BUTTON_MAX + SDL_CONTROLLER_BINDING_AXIS_RIGHTY_NEGATIVE,
    SDL_CONTROLLER_BUTTON_MAX + SDL_CONTROLLER_BINDING_AXIS_RIGHTY_POSITIVE,
    SDL_CONTROLLER_BUTTON_RIGHTSTICK,
    SDL_CONTROLLER_BUTTON_LEFTSHOULDER,
    SDL_CONTROLLER_BUTTON_MAX + SDL_CONTROLLER_BINDING_AXIS_TRIGGERLEFT,
    SDL_CONTROLLER_BUTTON_RIGHTSHOULDER,
    SDL_CONTROLLER_BUTTON_MAX + SDL_CONTROLLER_BINDING_AXIS_TRIGGERRIGHT,
    SDL_CONTROLLER_BUTTON_DPAD_UP,
    SDL_CONTROLLER_BUTTON_DPAD_RIGHT,
    SDL_CONTROLLER_BUTTON_DPAD_DOWN,
    SDL_CONTROLLER_BUTTON_DPAD_LEFT,
    SDL_CONTROLLER_BUTTON_BACK,
    SDL_CONTROLLER_BUTTON_GUIDE,
    SDL_CONTROLLER_BUTTON_START,
}

Definition at line 86 of file controllermap.c.

Referenced by ConfigureBinding(), SetCurrentBinding(), and WatchJoystick().

SDL_GameControllerExtendedBind s_arrBindings[BINDING_COUNT]

static

Definition at line 138 of file controllermap.c.

SDL_bool s_bBindingComplete

static

Definition at line 152 of file controllermap.c.

Referenced by SetCurrentBinding(), and WatchJoystick().

int s_iCurrentBinding

static

Definition at line 150 of file controllermap.c.

Referenced by ConfigureBinding(), SetCurrentBinding(), and WatchJoystick().

int s_nNumAxes

static

Definition at line 147 of file controllermap.c.

Referenced by SetCurrentBinding(), and WatchJoystick().

Uint32 s_unPendingAdvanceTime

static

Definition at line 151 of file controllermap.c.

Referenced by ConfigureBinding(), SetCurrentBinding(), and WatchJoystick().

int x

Definition at line 54 of file controllermap.c.

int y

Definition at line 54 of file controllermap.c.