void boundaryFill(int px,int py,int boundaryColor)
{
int x=px;
int y=py;
if(getpixel(x,y)!=boundaryColor && x>=0 && y>=0 && x<=getmaxx() && y<=getmaxy())
{
putpixel(x,y,boundaryColor);
boundaryFill(x+1,y,boundaryColor);
boundaryFill(x,y+1,boundaryColor);
boundaryFill(x-1,y,boundaryColor);
boundaryFill(x,y-1,boundaryColor);
}
}
int main(void)
{
/* request auto detection */
int gdriver = DETECT, gmode, errorcode;
int xmax, ymax;
/* initialize graphics and local variables */
initgraph(&gdriver, &gmode, "C:\\Turboc3\\BGI");
/* read result of initialization */
errorcode = graphresult();
/* an error occurred */
if (errorcode != grOk)
{
printf("Graphics error: %s\n", grapherrormsg(errorcode));
printf("Press any key to halt:");
getch();
exit(1);
}
setcolor(getmaxcolor());
//xmax = getmaxx();
// ymax = getmaxy();
line(50,50,100,50);
line(100,50,100,100);
line(100,100,50,100);
line(50,50,50,100);
//printf("%d",getpixel(70,70));
boundaryFill(70,70,getmaxcolor());
getch();
closegraph();
return 0;
}
void boundaryFill(int x, int y, int bc, int fc) // 4-connected (8-connected not possible)
{
int color = getpixel(x,y);
if((color!=bc)&&(color!=fc))
{
putpixel(x,y,fc);
//delay(1);
boundaryFill(x+1,y,bc,fc); // right
boundaryFill(x,y+1,bc,fc); // top
boundaryFill(x-1,y,bc,fc); // left
boundaryFill(x,y-1,bc,fc); // bottom
}
else
return;
}
