@shopify/react-native-skia/lib/module/external/reanimated/useAnimatedImageValue.js

High-performance React Native Graphics using Skia

import { useEffect } from "react";
import { useAnimatedImage } from "../../skia/core/AnimatedImage";
import Rea from "./ReanimatedProxy";
const DEFAULT_FRAME_DURATION = 60;
export const useAnimatedImageValue = (source, paused) => {
  const defaultPaused = Rea.useSharedValue(false);
  const isPaused = paused !== null && paused !== void 0 ? paused : defaultPaused;
  const currentFrame = Rea.useSharedValue(null);
  const lastTimestamp = Rea.useSharedValue(-1);
  const animatedImage = useAnimatedImage(source, err => {
    console.error(err);
    throw new Error(`Could not load animated image - got '${err.message}'`);
  }, false);
  const frameDuration = (animatedImage === null || animatedImage === void 0 ? void 0 : animatedImage.currentFrameDuration()) || DEFAULT_FRAME_DURATION;
  Rea.useFrameCallback(frameInfo => {
    if (!animatedImage) {
      currentFrame.value = null;
      return;
    }
    if (isPaused.value && lastTimestamp.value !== -1) {
      return;
    }
    const {
      timestamp
    } = frameInfo;
    const elapsed = timestamp - lastTimestamp.value;

    // Check if it's time to switch frames based on GIF frame duration
    if (elapsed < frameDuration) {
      return;
    }

    // Update the current frame
    animatedImage.decodeNextFrame();
    if (currentFrame.value) {
      currentFrame.value.dispose();
    }
    currentFrame.value = animatedImage.getCurrentFrame();

    // Update the last timestamp
    lastTimestamp.value = timestamp;
  });
  useEffect(() => {
    return () => {
      animatedImage === null || animatedImage === void 0 || animatedImage.dispose();
    };
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, []);
  return currentFrame;
};
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