Nintendo 3DS >> C/C++ >> SDL v1.2

Joystick

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參考資訊：
1. libctru doc
2. 3ds-examples
3. SDL_sysjoystick

說明：

API
int SDL_NumJoysticks(void)
SDL_Joystick* SDL_JoystickOpen(int device_index)
int SDL_PollEvent(SDL_Event *event)
void SDL_JoystickClose(SDL_Joystick *joystick)

main.c

#include <stdio.h>
#include <stdlib.h>
#include <3ds.h>
#include <SDL.h>
#include <SDL_gfxPrimitives.h>

int main(void)
{
    char buf[255] = {0};
    SDL_Event event = {0};
    SDL_Joystick *joy = NULL;
    SDL_Surface *screen = NULL;

    SDL_Init(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK);
    screen = SDL_SetVideoMode(400, 240, 16, SDL_HWSURFACE);
    SDL_FillRect(screen, &screen->clip_rect, SDL_MapRGB(screen->format, 0x00, 0x00, 0x00));
    SDL_Flip(screen);

    int num = SDL_NumJoysticks();
    if (num > 0) {
        joy = SDL_JoystickOpen(0);
    }
    while (1) {
        if (SDL_PollEvent(&event)) {
            if (event.type == SDL_JOYAXISMOTION) {
                SDL_FillRect(screen, &screen->clip_rect, SDL_MapRGB(screen->format, 0x00, 0x00, 0x00));
                sprintf(buf, "axis: %d, value: %d", event.jaxis.axis, event.jaxis.value);
                stringRGBA(screen, 100, 100, buf, 0xff, 0xff, 0xff, 0xff);
                SDL_Flip(screen);
            }
            if ((event.type == SDL_JOYBUTTONDOWN) || (event.type == SDL_JOYBUTTONUP)) {
                SDL_FillRect(screen, &screen->clip_rect, SDL_MapRGB(screen->format, 0x00, 0x00, 0x00));
                sprintf(buf, "button: %d, state: %d", event.jbutton.button, event.jbutton.state);
                stringRGBA(screen, 100, 100, buf, 0xff, 0xff, 0xff, 0xff);
                SDL_Flip(screen);
            }
        }
        SDL_Delay(100);
    }

    if (joy) {
        SDL_JoystickClose(joy);
    }
    SDL_Quit();
    return 0;
}

P.S. 目前無法從SDL去取得DPad、Touch的輸入狀態

完成

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