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

Hello, world!

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參考資訊：
1. libctru doc
2. 3ds-examples

說明：

API
int SDL_Init(Uint32 flags)
SDL_Surface *SDL_SetVideoMode(int width, int height, int bpp, Uint32 flags)
int stringRGBA(SDL_Surface *dst, Sint16 x, Sint16 y, const char *s, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
int SDL_Flip(SDL_Surface *screen)
void SDL_Delay(Uint32 ms)
void SDL_Quit(void)

main.c

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

    SDL_Init(SDL_INIT_VIDEO);
    screen = SDL_SetVideoMode(400, 240, 16, SDL_HWSURFACE);

    stringRGBA(screen, 100, 100, "hello, world!", 0xff, 0xff, 0xff, 0xff);
    SDL_Flip(screen);
    SDL_Delay(3000);

    SDL_Quit();
    return 0;
}

Makefile

include $(DEVKITARM)/3ds_rules

all:
	arm-none-eabi-gcc -mword-relocations -ffunction-sections -march=armv6k -mtune=mpcore -mfloat-abi=hard -mtp=soft -I/opt/devkitpro/libctru/include -I/opt/devkitpro/portlibs/3ds/include/ -I/opt/devkitpro/portlibs/3ds/include/opus/ -I/opt/devkitpro/portlibs/3ds/include/SDL -D__3DS__ -c main.c -o main.o 
	arm-none-eabi-gcc -specs=3dsx.specs -march=armv6k -mtune=mpcore -mfloat-abi=hard -mtp=soft main.o -L/opt/devkitpro/portlibs/3ds/lib -lopusfile -logg -lopus -L/opt/devkitpro/libctru/lib -lSDL_image -lSDL_mixer -lSDL_ttf -lSDL_gfx -lSDL -lfreetype -lbz2 -lpng -ljpeg -lz -lcitro2d -lcitro3d -lctru -lm -lstdc++ -o main.elf
	smdhtool --create "main" "devkitARM" "steward" /opt/devkitpro/libctru/default_icon.png main.smdh
	3dsxtool main.elf main.3dsx --smdh=main.smdh

clean:
	rm -rf main.o main.elf main.3dsx main.smdh

編譯、執行

$ sudo docker run --rm -it -v $(pwd):/source nds-env /bin/bash
root@c18881035cba:/source# make && exit
$ citra main.3dsx

完成

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