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

Circle

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參考資訊：
1. libctru doc
2. 3ds-examples

說明：

API
int circleColor(SDL_Surface *dst, Sint16 x, Sint16 y, Sint16 r, Uint32 color)
int circleRGBA(SDL_Surface *dst, Sint16 x, Sint16 y, Sint16 rad, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
int aacircleColor(SDL_Surface *dst, Sint16 x, Sint16 y, Sint16 r, Uint32 color)
int aacircleRGBA(SDL_Surface *dst, Sint16 x, Sint16 y, Sint16 rad, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
int filledCircleColor(SDL_Surface *dst, Sint16 x, Sint16 y, Sint16 r, Uint32 color)
int filledCircleRGBA(SDL_Surface *dst, Sint16 x, Sint16 y, Sint16 rad, Uint8 r, Uint8 g, Uint8 b, Uint8 a)

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);
    circleRGBA(screen, 50, 100, 20, 0xff, 0x00, 0x00, 0xff);
    aacircleRGBA(screen, 100, 100, 20, 0x00, 0xff, 0x00, 0xff);
    filledCircleRGBA(screen, 150, 100, 20, 0x00, 0x00, 0xff, 0xff);
    SDL_Flip(screen);
    SDL_Delay(3000);

    SDL_Quit();
    return 0;
}

完成

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