掌機 - Nintendo 3DS - C/C++ - SDL v1.2 - Color Key

參考資訊：
https://libctru.devkitpro.org/index.html
https://github.com/devkitPro/3ds-examples

main.c

#include <stdio.h>
#include <stdlib.h>
#include <SDL.h>
 
int main(void)
{
    SDL_Surface *screen = NULL;

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

    SDL_Surface *bmp = SDL_LoadBMP("main.bmp");
    SDL_Surface *key = SDL_DisplayFormat(bmp);
    SDL_SetColorKey(key, SDL_SRCCOLORKEY, SDL_MapRGB(key->format, 0xff, 0xff, 0xff));

    SDL_BlitSurface(key, NULL, screen, NULL);
    SDL_Flip(screen);
    SDL_Delay(3000);

    SDL_FreeSurface(bmp);
    SDL_FreeSurface(key);
    SDL_Quit();
    return 0;
}

完成