SDL v1.2 >> C/C++

Polygon

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參考資訊：
1. sdl
2. gfx

函數

int polygonColor(SDL_Surface * dst, Sint16 * vx, Sint16 * vy, int n, Uint32 color);
int polygonRGBA(SDL_Surface * dst, Sint16 * vx, Sint16 * vy, int n, Uint8 r, Uint8 g, Uint8 b, Uint8 a);

int aapolygonColor(SDL_Surface * dst, Sint16 * vx, Sint16 * vy, int n, Uint32 color);
int aapolygonRGBA(SDL_Surface * dst, Sint16 * vx, Sint16 * vy, int n, Uint8 r, Uint8 g, Uint8 b, Uint8 a);

int filledPolygonColor(SDL_Surface * dst, Sint16 * vx, Sint16 * vy, int n, int color);
int filledPolygonRGBA(SDL_Surface * dst, Sint16 * vx, Sint16 * vy, int n, 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(int argc, char **argv)
{
    Sint16 vx0[] = {100, 150, 125,  75,  50};
    Sint16 vy0[] = {10,   25,  50,  50,  25};
    Sint16 vx1[] = {100, 150, 125,  75,  50};
    Sint16 vy1[] = {60,   75, 100, 100,  75};
    Sint16 vx2[] = {100, 150, 125,  75,  50};
    Sint16 vy2[] = {110, 125, 150, 150, 125};
    SDL_Surface *screen = NULL;

    SDL_Init(SDL_INIT_VIDEO);
    screen = SDL_SetVideoMode(320, 240, 16, SDL_HWSURFACE);
    polygonRGBA(screen, vx0, vy0, 5, 0xff, 0x00, 0x00, 0xff);
    aapolygonRGBA(screen, vx1, vy1, 5, 0x00, 0xff, 0x00, 0xff);
    filledPolygonRGBA(screen, vx2, vy2, 5, 0xff, 0xff, 0x00, 0xff);
    SDL_Flip(screen);
    SDL_Delay(3000);

    SDL_Quit();
    return 0;
}

編譯、執行

$ gcc main.c -o main -lSDL -lSDL_gfx -I/usr/include/SDL
$ ./main

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