//http://dsqiu.iteye.com/blog/1689130
//Recursive 4-way floodfill, crashes if recursion stack is full
void floodFill4(int x, int y, int newColor, int oldColor)
{
if(x >= 0 && x < w && y >= 0 && y < h && screenBuffer[x][y] == oldColor && screenBuffer[x][y] != newColor)
{
screenBuffer[x][y] = newColor; //set color before starting recursion
floodFill4(x + 1, y, newColor, oldColor);
floodFill4(x - 1, y, newColor, oldColor);
floodFill4(x, y + 1, newColor, oldColor);
floodFill4(x, y - 1, newColor, oldColor);
}
}
void floodFill4 (int x, int y, int fillColor, int interiorColor)
{
int color;
/* Set current color to fillColor, then perform following operations. */
getPixel (x, y, color);
if (color = interiorColor)
{
setPixel (x, y); // Set color of pixel to fillColor.
floodFill4 (x + 1, y, fillColor, interiorColor);
floodFill4 (x - 1, y, fillColor, interiorColor);
floodFill4 (x, y + 1, fillColor, interiorColor);
floodFill4 (x, y - 1, fillColor, interiorColor)
}
void QGLDessin::floodFill4(int x, int y, QImage* image, QPainter* painter)
{
int w = image->width();
int h = image->height();
QRgb currentColor = image->pixel(x, y);
QRgb bgrColor = qRgb(0, 0, 0);
QRgb newColor = qRgb(255, 255, 255);
if(x >= 0 && x < w && y >= 0 && y < h && currentColor == bgrColor && currentColor != newColor)
{
painter->drawPoint(x, y);
draw_pixel(x, y);
floodFill4(x + 1, y, image, painter);
floodFill4(x - 1, y, image, painter);
floodFill4(x, y + 1, image, painter);
floodFill4(x, y - 1, image, painter);
}
}
void QGLDessin::Coloriage()
{
QPixmap qPix(ui->widget->grab());
QImage* image = new QImage(qPix.toImage());
// image->save("image.png");
// QImage double_image = this->grabFramebuffer();
// double_image.save("_image.png");
// QImage image = double_image.scaled(this->width(), this->height(), Qt::IgnoreAspectRatio);
QPainter* painter = new QPainter(image);
painter->setPen(Qt::white);
if(coloriageMode == DessinMode::sfr)
floodFill4(mouse_x, mouse_y, image, painter);
else if(coloriageMode == DessinMode::sfd)
floodFill4Stack(mouse_x, mouse_y, image, painter);
this->update();
delete painter;
}