Pixel[] selectedPixels;
void Crop_AbsoluteDimensions (int posX, int posY, int offsetX, int offsetY) {

    // current crop tool

}

void Crop_ToSelection () {
    Pixel pixelLeft = selectedPixels[0];
    for (int i = 0; i < selectedPixels.Length; i++) {
        if (selectedPixels[i].pos.x < pixelLeft.pos.x) {
            pixelLeft = selectedPixels[i];
        }
    }
    Pixel pixelRight = selectedPixels[0];
    for (int i = 0; i < selectedPixels.Length; i++) {
        if (selectedPixels[i].pos.x > pixelRight.pos.x) {
            pixelRight = selectedPixels[i];
        }
    }
    Pixel pixelUp = selectedPixels[0];
    for (int i = 0; i < selectedPixels.Length; i++) {
        if (selectedPixels[i].pos.y > pixelUp.pos.x) {
            pixelUp = selectedPixels[i];
        }
    }
    Pixel pixelDown = selectedPixels[0];
    for (int i = 0; i < selectedPixels.Length; i++) {
        if (selectedPixels[i].pos.y < pixelDown.pos.x) {
            pixelDown = selectedPixels[i];
        }
    }
    int posX = pixelLeft.pos.x;
    int posY = pixelDown.pos.y;
    int offsetX = pixelRight.pos.x - pixelLeft.pos.x;
    int offsetY = pixelUp.pos.y - pixelDown.pos.y;
    Crop_AbsoluteDimensions(posX,posY,offsetX,offsetY);
}