3b1b-manim/manimlib/utils/images.py

import numpy as np
from PIL import Image
from typing import Iterable

from manimlib.utils.file_ops import find_file
from manimlib.utils.directories import get_raster_image_dir
from manimlib.utils.directories import get_vector_image_dir


def get_full_raster_image_path(image_file_name: str) -> str:
    return find_file(
        image_file_name,
        directories=[get_raster_image_dir()],
        extensions=[".jpg", ".jpeg", ".png", ".gif", ""]
    )


def get_full_vector_image_path(image_file_name: str) -> str:
    return find_file(
        image_file_name,
        directories=[get_vector_image_dir()],
        extensions=[".svg", ".xdv", ""],
    )


def drag_pixels(frames: Iterable) -> list:
    curr = frames[0]
    new_frames = []
    for frame in frames:
        curr += (curr == 0) * np.array(frame)
        new_frames.append(np.array(curr))
    return new_frames


def invert_image(image: Iterable) -> Image:
    arr = np.array(image)
    arr = (255 * np.ones(arr.shape)).astype(arr.dtype) - arr
    return Image.fromarray(arr)