/*
* Function: floodFillRecursion()
* --------------------
* Helper function that does the actual recursion for floodFill
*
* Preconditions: None
*
* @param: A buffered image object that tells us where and what was clicked
* x,y position clicked
* color selected to change to
* @return: The number of pixels actually changed.
*/
int floodFillRecursion(GBufferedImage& image, int x, int y, int colorClicked, int color,int& numChangedPixels) {
if(image.getRGB(x,y)==colorClicked){
image.setRGB(x,y,color);
numChangedPixels++;
} else {
return numChangedPixels;
}
if(image.inBounds(x-1,y)){
floodFillRecursion(image,x-1,y,colorClicked,color,numChangedPixels);
}
if(image.inBounds(x+1,y)){
floodFillRecursion(image,x+1,y,colorClicked,color,numChangedPixels);
}
if(image.inBounds(x,y-1)){
floodFillRecursion(image,x,y-1,colorClicked,color,numChangedPixels);
}
if(image.inBounds(x,y+1)){
floodFillRecursion(image,x,y+1,colorClicked,color,numChangedPixels);
}
return numChangedPixels;
}
/*
* Function: floodFill();
* --------------------
* Function that fills clicked color with selected color
*
* Preconditions: None
*
* @param: A buffered image object that tells us where and what was clicked
* x,y position clicked
* color selected to change to
* @return: returns the numebr of pixels changed
*/
int floodFill(GBufferedImage& image, int x, int y, int color) {
int colorClicked = image.getRGB(x,y);
int numChangedPixels = 0;
// First check to make sure that we don't do anything if the color picked is also
// The color selected. If it is same return 0
if(colorClicked==color){
return 0;
}
// Doubly make sure that the place clicked is inBounds
if(image.inBounds(x,y)){
return floodFillRecursion(image,x,y,colorClicked,color,numChangedPixels);
} else {
try
{
throw 0003;
}
catch (int e)
{
cout << "An exception occurred (x||y out of bounds). Exception Nr. " << e << '\n';
}
}
return 0;
}