Revert 274558 "Move some extensions renderer resources to extens..."

trunk/src/extensions/renderer/resources/image_util.js

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// This function takes an object |imageSpec| with the key |path| -
-// corresponding to the internet URL to be translated - and optionally
-// |width| and |height| which are the maximum dimensions to be used when
-// converting the image.
-function loadImageData(imageSpec, callbacks) {
-  var path = imageSpec.path;
-  var img = new Image();
-  if (typeof callbacks.onerror === 'function') {
-    img.onerror = function() {
-      callbacks.onerror({ problem: 'could_not_load', path: path });
-    };
-  }
-  img.onload = function() {
-    var canvas = document.createElement('canvas');
-
-    if (img.width <= 0 || img.height <= 0) {
-      callbacks.onerror({ problem: 'image_size_invalid', path: path});
-      return;
-    }
-
-    var scaleFactor = 1;
-    if (imageSpec.width && imageSpec.width < img.width)
-      scaleFactor = imageSpec.width / img.width;
-
-    if (imageSpec.height && imageSpec.height < img.height) {
-      var heightScale = imageSpec.height / img.height;
-      if (heightScale < scaleFactor)
-        scaleFactor = heightScale;
-    }
-
-    canvas.width = img.width * scaleFactor;
-    canvas.height = img.height * scaleFactor;
-
-    var canvas_context = canvas.getContext('2d');
-    canvas_context.clearRect(0, 0, canvas.width, canvas.height);
-    canvas_context.drawImage(img, 0, 0, canvas.width, canvas.height);
-    try {
-      var imageData = canvas_context.getImageData(
-          0, 0, canvas.width, canvas.height);
-      if (typeof callbacks.oncomplete === 'function') {
-        callbacks.oncomplete(
-            imageData.width, imageData.height, imageData.data.buffer);
-      }
-    } catch (e) {
-      if (typeof callbacks.onerror === 'function') {
-        callbacks.onerror({ problem: 'data_url_unavailable', path: path });
-      }
-    }
-  }
-  img.src = path;
-}
-
-function on_complete_index(index, err, loading, finished, callbacks) {
-  return function(width, height, imageData) {
-    delete loading[index];
-    finished[index] = { width: width, height: height, data: imageData };
-    if (err)
-      callbacks.onerror(index);
-    if ($Object.keys(loading).length == 0)
-      callbacks.oncomplete(finished);
-  }
-}
-
-function loadAllImages(imageSpecs, callbacks) {
-  var loading = {}, finished = [],
-      index, pathname;
-
-  for (var index = 0; index < imageSpecs.length; index++) {
-    loading[index] = imageSpecs[index];
-    loadImageData(imageSpecs[index], {
-      oncomplete: on_complete_index(index, false, loading, finished, callbacks),
-      onerror: on_complete_index(index, true, loading, finished, callbacks)
-    });
-  }
-}
-
-exports.loadImageData = loadImageData;
-exports.loadAllImages = loadAllImages;