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

Top、Bottom Screen

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

說明：
SDL_TOPSCR：解析度400x240
SDL_DUALSCR：解析度320x480
SDL_BOTTOMSCR：解析度320x240
SDL_DUALSCR + SDL_FULLSCREEN：解析度320x480(上屏會從320x240拉伸到400x240)

main.c

#include <stdio.h>
#include <stdlib.h>
#include <SDL.h>
  
int main(void)
{
    SDL_Rect rt={0};
    SDL_Surface *screen = NULL;
 
    SDL_Init(SDL_INIT_VIDEO);
    screen = SDL_SetVideoMode(320, 240, 16, SDL_HWSURFACE | SDL_BOTTOMSCR);
 
    SDL_FillRect(screen, &screen->clip_rect, SDL_MapRGB(screen->format, 0xff, 0x00, 0x00));
 
    rt.x = 50;
    rt.y = 50;
    rt.w = 30;
    rt.h = 30;
    SDL_FillRect(screen, &rt, SDL_MapRGB(screen->format, 0x00, 0xff, 0x00));
 
    rt.x = 100;
    rt.y = 100;
    rt.w = 50;
    rt.h = 100;
    SDL_FillRect(screen, &rt, SDL_MapRGB(screen->format, 0x00, 0x00, 0xff));
 
    SDL_Flip(screen);
    SDL_Delay(3000);
    SDL_Quit();
    return 0;
}

完成

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