react-native-zoom-toolkit/lib/module/commons/utils/getCropRotatedSize.js

Smoothly zoom any image, video or component you want!

import { getAspectRatioSize } from '../../utils/getAspectRatioSize';
export const getCropRotatedSize = options => {
  'worklet';

  const {
    crop,
    angle,
    resolution
  } = options;
  const cropAspectRatio = crop.width / crop.height;
  let base = crop;
  const flipped = angle % Math.PI === 0;
  const aspectRatio = resolution.width / resolution.height;
  const inverseAspectRatio = resolution.height / resolution.width;
  base = getAspectRatioSize({
    aspectRatio: flipped ? aspectRatio : inverseAspectRatio,
    width: cropAspectRatio >= 1 ? undefined : crop.width,
    height: cropAspectRatio >= 1 ? crop.height : undefined
  });
  let sizeModifier = 1;
  if (base.height < crop.height) sizeModifier = crop.height / base.height;
  if (base.width < crop.width) sizeModifier = crop.width / base.width;
  base.width = base.width * sizeModifier;
  base.height = base.height * sizeModifier;
  const maxWidth = Math.abs(base.height * Math.sin(angle)) + Math.abs(base.width * Math.cos(angle));
  const maxHeight = Math.abs(base.height * Math.cos(angle)) + Math.abs(base.width * Math.sin(angle));
  return getAspectRatioSize({
    aspectRatio: aspectRatio,
    width: aspectRatio >= 1 ? undefined : maxWidth,
    height: aspectRatio >= 1 ? maxHeight : undefined
  });
};
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