class_name ImageTools

static func draw_circle(image: Image, center: Vector2i, length: int, color: Color = Color.WHITE):
    for x in range(image.get_width()):
        for y in range(image.get_height()):
            var center_distance = Vector2i(x, y).distance_to(center)

            if (center_distance <= length):
                image.set_pixel(x, y, color)
            

static func draw_gradient(image: Image, center: Vector2i, length: int, color: Color = Color.WHITE, inverse := false):
    for x in range(image.get_width()):
        for y in range(image.get_height()):
            var original_pixel_color = image.get_pixel(x, y)
            var center_distance = Vector2i(x, y).distance_to(center)

            if (center_distance == 0):
                if not inverse:
                    image.set_pixel(x, y, original_pixel_color.blend(color))
            else:
                var color_to_add = Color(color, 1 / (center_distance / length)) if not inverse else Color(color, center_distance / length)
                image.set_pixel(
                    x,
                    y,
                    original_pixel_color.blend(color_to_add)
                )

static func flatten(image: Image, threshold := 0.5):
    for x in range(image.get_width()):
        for y in range(image.get_height()):
            var original_pixel_color = image.get_pixel(x, y)

            if original_pixel_color.r > threshold:
                image.set_pixel(
                    x,
                    y,
                    Color.WHITE
                )
            else:
                image.set_pixel(
                    x,
                    y,
                    Color.BLACK
                )

static func copy(from: Image, to : Image):
    for x in range(from.get_width()):
        for y in range(from.get_height()):
            to.set_pixel(x, y, from.get_pixel(x, y))