/*
    ===============
     Filled Circle
    ===============

*/

#include <SDL/SDL.h>
#include <SDL/SDL_image.h>
#include <math.h>
#include <iostream>
using namespace std;

SDL_Surface *Screen = SDL_SetVideoMode(640,480,32,SDL_SWSURFACE);

 SDL_Surface* PixelSurface = SDL_CreateRGBSurface(SDL_HWSURFACE, 640, 480,
  Screen->format->BitsPerPixel,
  Screen->format->Rmask,
  Screen->format->Gmask,
  Screen->format->Bmask,
  Screen->format->Amask
    );

void inline SDL_Draw()
{
    int
    mouse_x = 0,
    mouse_y = 0,
    centerx = 100,
    centery = 100,
    radius = 50;

    int x, y,
    color = 0x00ff00;

    float
    two_pi = 360.283f,
    angle_inc = 1.0f/radius;

    for(float angle = 0.0f; angle<=two_pi; angle+=angle_inc)
    {
        unsigned int *ptr = static_cast <unsigned int *> (PixelSurface->pixels);

        x = centerx+radius*cos(angle);

        y = centery+radius*sin(angle);

        //set the centerx and y to the radius and = it color

        int offset = y * (PixelSurface->pitch/sizeof(unsigned int));

        ptr[offset + x] = color;
        ptr[centerx * radius] = color;

    }

    SDL_BlitSurface(PixelSurface,NULL,Screen,NULL);
}

int main(int argc, char *Argv[])
{
    bool
    done = false;

    SDL_Event event;

    SDL_WM_SetCaption("Test","Test");

    while(!done)
    {
        SDL_Draw();

        while(SDL_PollEvent(&event))
        {

            switch(event.type)
            {
                case SDL_QUIT:
                return 0;
                break;
            }
        }

        SDL_Flip(Screen);
        SDL_FillRect(PixelSurface,NULL,0x000000);
    }
    return 0;
}