rgba.py 文件源码

def fromhwb(self, h, w, b):
        """Convert to RGB from HWB."""

        # Normalize white and black
        # w + b <= 1.0
        if w + b > 1.0:
            norm_factor = 1.0 / (w + b)
            w *= norm_factor
            b *= norm_factor

        # Convert to HSV and then to RGB
        s = 1.0 - (w / (1.0 - b))
        v = 1.0 - b
        r, g, b = hsv_to_rgb(h, s, v)
        self.r = round_int(r * 255.0) & 0xFF
        self.g = round_int(g * 255.0) & 0xFF
        self.b = round_int(b * 255.0) & 0xFF