def resize(self, img: WandImage, mult: float) -> WandImage:
# No need to waste our resources for resizing by the same exact multiplier (1:1)
if mult == 1.0:
return img
# Or even invalid multiplier (raise exception instead)
elif mult <= 0:
raise ValueError("Image resize multiplier must not be less than 0!")
# Resize the image using the multiplier
new_width = round(img.width * mult)
new_height = round(img.height * mult)
img.adaptive_resize(new_width, new_height)
# Then crop the image so it's centered
crop_left = round((self.max_width - img.width) / 2)
if crop_left < 0:
crop_left = 0
crop_right = crop_left + self.max_width
if crop_right > img.width:
crop_right = img.width
img.crop(crop_left, 0, crop_right, self.max_height)
return img
