1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/image/test/mochitest/imgutils.js Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,127 @@
1.4 +/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +// Helper file for shared image functionality
1.6 +//
1.7 +// Note that this is use by tests elsewhere in the source tree. When in doubt,
1.8 +// check mxr before removing or changing functionality.
1.9 +
1.10 +// Helper function to clear the image cache of content images
1.11 +function clearImageCache()
1.12 +{
1.13 + var tools = SpecialPowers.Cc["@mozilla.org/image/tools;1"]
1.14 + .getService(SpecialPowers.Ci.imgITools);
1.15 + var imageCache = tools.getImgCacheForDocument(window.document);
1.16 + imageCache.clearCache(false); // true=chrome, false=content
1.17 +}
1.18 +
1.19 +// Helper function to determine if the frame is decoded for a given image id
1.20 +function isFrameDecoded(id)
1.21 +{
1.22 + return (getImageStatus(id) &
1.23 + SpecialPowers.Ci.imgIRequest.STATUS_FRAME_COMPLETE)
1.24 + ? true : false;
1.25 +}
1.26 +
1.27 +// Helper function to determine if the image is loaded for a given image id
1.28 +function isImageLoaded(id)
1.29 +{
1.30 + return (getImageStatus(id) &
1.31 + SpecialPowers.Ci.imgIRequest.STATUS_LOAD_COMPLETE)
1.32 + ? true : false;
1.33 +}
1.34 +
1.35 +// Helper function to get the status flags of an image
1.36 +function getImageStatus(id)
1.37 +{
1.38 + // Get the image
1.39 + var img = SpecialPowers.wrap(document.getElementById(id));
1.40 +
1.41 + // QI the image to nsImageLoadingContent
1.42 + img.QueryInterface(SpecialPowers.Ci.nsIImageLoadingContent);
1.43 +
1.44 + // Get the request
1.45 + var request = img.getRequest(SpecialPowers.Ci
1.46 + .nsIImageLoadingContent
1.47 + .CURRENT_REQUEST);
1.48 +
1.49 + // Return the status
1.50 + return request.imageStatus;
1.51 +}
1.52 +
1.53 +// Forces a synchronous decode of an image by drawing it to a canvas. Only
1.54 +// really meaningful if the image is fully loaded first
1.55 +function forceDecode(id)
1.56 +{
1.57 + // Get the image
1.58 + var img = document.getElementById(id);
1.59 +
1.60 + // Make a new canvas
1.61 + var canvas = document.createElement("canvas");
1.62 +
1.63 + // Draw the image to the canvas. This forces a synchronous decode
1.64 + var ctx = canvas.getContext("2d");
1.65 + ctx.drawImage(img, 0, 0);
1.66 +}
1.67 +
1.68 +
1.69 +// Functions to facilitate getting/setting various image-related prefs
1.70 +//
1.71 +// If you change a pref in a mochitest, Don't forget to reset it to its
1.72 +// original value!
1.73 +//
1.74 +// Null indicates no pref set
1.75 +
1.76 +const DISCARD_ENABLED_PREF = {name: "discardable", branch: "image.mem.", type: "bool"};
1.77 +const DECODEONDRAW_ENABLED_PREF = {name: "decodeondraw", branch: "image.mem.", type: "bool"};
1.78 +const DISCARD_TIMEOUT_PREF = {name: "min_discard_timeout_ms", branch: "image.mem.", type: "int"};
1.79 +
1.80 +function setImagePref(pref, val)
1.81 +{
1.82 + var prefService = SpecialPowers.Cc["@mozilla.org/preferences-service;1"]
1.83 + .getService(SpecialPowers.Ci.nsIPrefService);
1.84 + var branch = prefService.getBranch(pref.branch);
1.85 + if (val != null) {
1.86 + switch(pref.type) {
1.87 + case "bool":
1.88 + branch.setBoolPref(pref.name, val);
1.89 + break;
1.90 + case "int":
1.91 + branch.setIntPref(pref.name, val);
1.92 + break;
1.93 + default:
1.94 + throw new Error("Unknown pref type");
1.95 + }
1.96 + }
1.97 + else if (branch.prefHasUserValue(pref.name))
1.98 + branch.clearUserPref(pref.name);
1.99 +}
1.100 +
1.101 +function getImagePref(pref)
1.102 +{
1.103 + var prefService = SpecialPowers.Cc["@mozilla.org/preferences-service;1"]
1.104 + .getService(SpecialPowers.Ci.nsIPrefService);
1.105 + var branch = prefService.getBranch(pref.branch);
1.106 + if (branch.prefHasUserValue(pref.name)) {
1.107 + switch (pref.type) {
1.108 + case "bool":
1.109 + return branch.getBoolPref(pref.name);
1.110 + case "int":
1.111 + return branch.getIntPref(pref.name);
1.112 + default:
1.113 + throw new Error("Unknown pref type");
1.114 + }
1.115 + }
1.116 + else
1.117 + return null;
1.118 +}
1.119 +
1.120 +// JS implementation of imgIScriptedNotificationObserver with stubs for all of its methods.
1.121 +function ImageDecoderObserverStub()
1.122 +{
1.123 + this.sizeAvailable = function sizeAvailable(aRequest) {}
1.124 + this.frameComplete = function frameComplete(aRequest) {}
1.125 + this.decodeComplete = function decodeComplete(aRequest) {}
1.126 + this.loadComplete = function loadComplete(aRequest) {}
1.127 + this.frameUpdate = function frameUpdate(aRequest) {}
1.128 + this.discard = function discard(aRequest) {}
1.129 + this.isAnimated = function isAnimated(aRequest) {}
1.130 +}
