1 files changed, 0 insertions, 189 deletions
diff --git a/app/javascript/mastodon/utils/resize_image.js b/app/javascript/mastodon/utils/resize_image.js
deleted file mode 100644
index fb8c3c11e..000000000
--- a/app/javascript/mastodon/utils/resize_image.js
+++ /dev/null
@@ -1,189 +0,0 @@
-import EXIF from 'exif-js';
-
-const MAX_IMAGE_PIXELS = 2073600; // 1920x1080px
-
-const _browser_quirks = {};
-
-// Some browsers will automatically draw images respecting their EXIF orientation
-// while others won't, and the safest way to detect that is to examine how it
-// is done on a known image.
-// See https://github.com/w3c/csswg-drafts/issues/4666
-// and https://github.com/blueimp/JavaScript-Load-Image/commit/1e4df707821a0afcc11ea0720ee403b8759f3881
-const dropOrientationIfNeeded = (orientation) => new Promise(resolve => {
-  switch (_browser_quirks['image-orientation-automatic']) {
-  case true:
-    resolve(1);
-    break;
-  case false:
-    resolve(orientation);
-    break;
-  default:
-    // black 2x1 JPEG, with the following meta information set:
-    // - EXIF Orientation: 6 (Rotated 90° CCW)
-    const testImageURL =
-      'data:image/jpeg;base64,/9j/4QAiRXhpZgAATU0AKgAAAAgAAQESAAMAAAABAAYAAAA' +
-      'AAAD/2wCEAAEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBA' +
-      'QEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQE' +
-      'BAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAf/AABEIAAEAAgMBEQACEQEDEQH/x' +
-      'ABKAAEAAAAAAAAAAAAAAAAAAAALEAEAAAAAAAAAAAAAAAAAAAAAAQEAAAAAAAAAAAAAAAA' +
-      'AAAAAEQEAAAAAAAAAAAAAAAAAAAAA/9oADAMBAAIRAxEAPwA/8H//2Q==';
-    const img = new Image();
-    img.onload = () => {
-      const automatic = (img.width === 1 && img.height === 2);
-      _browser_quirks['image-orientation-automatic'] = automatic;
-      resolve(automatic ? 1 : orientation);
-    };
-    img.onerror = () => {
-      _browser_quirks['image-orientation-automatic'] = false;
-      resolve(orientation);
-    };
-    img.src = testImageURL;
-  }
-});
-
-// Some browsers don't allow reading from a canvas and instead return all-white
-// or randomized data. Use a pre-defined image to check if reading the canvas
-// works.
-const checkCanvasReliability = () => new Promise((resolve, reject) => {
-  switch(_browser_quirks['canvas-read-unreliable']) {
-  case true:
-    reject('Canvas reading unreliable');
-    break;
-  case false:
-    resolve();
-    break;
-  default:
-    // 2×2 GIF with white, red, green and blue pixels
-    const testImageURL =
-      'data:image/gif;base64,R0lGODdhAgACAKEDAAAA//8AAAD/AP///ywAAAAAAgACAAACA1wEBQA7';
-    const refData =
-      [255, 255, 255, 255,  255, 0, 0, 255,  0, 255, 0, 255,  0, 0, 255, 255];
-    const img = new Image();
-    img.onload = () => {
-      const canvas  = document.createElement('canvas');
-      const context = canvas.getContext('2d');
-      context.drawImage(img, 0, 0, 2, 2);
-      const imageData = context.getImageData(0, 0, 2, 2);
-      if (imageData.data.every((x, i) => refData[i] === x)) {
-        _browser_quirks['canvas-read-unreliable'] = false;
-        resolve();
-      } else {
-        _browser_quirks['canvas-read-unreliable'] = true;
-        reject('Canvas reading unreliable');
-      }
-    };
-    img.onerror = () => {
-      _browser_quirks['canvas-read-unreliable'] = true;
-      reject('Failed to load test image');
-    };
-    img.src = testImageURL;
-  }
-});
-
-const getImageUrl = inputFile => new Promise((resolve, reject) => {
-  if (window.URL && URL.createObjectURL) {
-    try {
-      resolve(URL.createObjectURL(inputFile));
-    } catch (error) {
-      reject(error);
-    }
-    return;
-  }
-
-  const reader = new FileReader();
-  reader.onerror = (...args) => reject(...args);
-  reader.onload  = ({ target }) => resolve(target.result);
-
-  reader.readAsDataURL(inputFile);
-});
-
-const loadImage = inputFile => new Promise((resolve, reject) => {
-  getImageUrl(inputFile).then(url => {
-    const img = new Image();
-
-    img.onerror = (...args) => reject(...args);
-    img.onload  = () => resolve(img);
-
-    img.src = url;
-  }).catch(reject);
-});
-
-const getOrientation = (img, type = 'image/png') => new Promise(resolve => {
-  if (!['image/jpeg', 'image/webp'].includes(type)) {
-    resolve(1);
-    return;
-  }
-
-  EXIF.getData(img, () => {
-    const orientation = EXIF.getTag(img, 'Orientation');
-    if (orientation !== 1) {
-      dropOrientationIfNeeded(orientation).then(resolve).catch(() => resolve(orientation));
-    } else {
-      resolve(orientation);
-    }
-  });
-});
-
-const processImage = (img, { width, height, orientation, type = 'image/png' }) => new Promise(resolve => {
-  const canvas  = document.createElement('canvas');
-
-  if (4 < orientation && orientation < 9) {
-    canvas.width  = height;
-    canvas.height = width;
-  } else {
-    canvas.width  = width;
-    canvas.height = height;
-  }
-
-  const context = canvas.getContext('2d');
-
-  switch (orientation) {
-  case 2: context.transform(-1, 0, 0, 1, width, 0); break;
-  case 3: context.transform(-1, 0, 0, -1, width, height); break;
-  case 4: context.transform(1, 0, 0, -1, 0, height); break;
-  case 5: context.transform(0, 1, 1, 0, 0, 0); break;
-  case 6: context.transform(0, 1, -1, 0, height, 0); break;
-  case 7: context.transform(0, -1, -1, 0, height, width); break;
-  case 8: context.transform(0, -1, 1, 0, 0, width); break;
-  }
-
-  context.drawImage(img, 0, 0, width, height);
-
-  canvas.toBlob(resolve, type);
-});
-
-const resizeImage = (img, type = 'image/png') => new Promise((resolve, reject) => {
-  const { width, height } = img;
-
-  const newWidth  = Math.round(Math.sqrt(MAX_IMAGE_PIXELS * (width / height)));
-  const newHeight = Math.round(Math.sqrt(MAX_IMAGE_PIXELS * (height / width)));
-
-  checkCanvasReliability()
-    .then(getOrientation(img, type))
-    .then(orientation => processImage(img, {
-      width: newWidth,
-      height: newHeight,
-      orientation,
-      type,
-    }))
-    .then(resolve)
-    .catch(reject);
-});
-
-export default inputFile => new Promise((resolve) => {
-  if (!inputFile.type.match(/image.*/) || inputFile.type === 'image/gif') {
-    resolve(inputFile);
-    return;
-  }
-
-  loadImage(inputFile).then(img => {
-    if (img.width * img.height < MAX_IMAGE_PIXELS) {
-      resolve(inputFile);
-      return;
-    }
-
-    resizeImage(img, inputFile.type)
-      .then(resolve)
-      .catch(() => resolve(inputFile));
-  }).catch(() => resolve(inputFile));
-});