fix(ios): report width/height of Blob as pixels, not points

iphone/TitaniumKit/TitaniumKit/Sources/API/TiBlob.m

@@ -68,7 +68,7 @@ - (NSUInteger)width
 {
   [self ensureImageLoaded];
   if (image != nil) {
-    return image.size.width;
+    return image.size.width * image.scale;
   }
   return 0;
 }
@@ -78,7 +78,7 @@ - (NSUInteger)height
 {
   [self ensureImageLoaded];
   if (image != nil) {
-    return image.size.height;
+    return image.size.height * image.scale;
   }
   return 0;
 }
@@ -88,7 +88,7 @@ - (NSUInteger)size
 {
   [self ensureImageLoaded];
   if (image != nil) {
-    return image.size.width * image.size.height;
+    return image.size.width * image.size.height * image.scale * image.scale;
   }
   switch (type) {
   case TiBlobTypeData: {

tests/Resources/ti.blob.addontest.js

@@ -0,0 +1,57 @@
+/*
+ * Appcelerator Titanium Mobile
+ * Copyright (c) 2011-Present by Appcelerator, Inc. All Rights Reserved.
+ * Licensed under the terms of the Apache Public License
+ * Please see the LICENSE included with this distribution for details.
+ */
+/* eslint-env mocha */
+/* eslint no-unused-expressions: "off" */
+'use strict';
+const should = require('./utilities/assertions');
+
+describe('Titnaium.Blob', function () {
+	this.slow(2000);
+	this.timeout(5000);
+
+	let win;
+	afterEach(done => { // fires after every test in sub-suites too...
+		if (win && !win.closed) {
+			win.addEventListener('close', function listener () {
+				win.removeEventListener('close', listener);
+				win = null;
+				done();
+			});
+			win.close();
+		} else {
+			win = null;
+			done();
+		}
+	});
+
+	// iOS had a bug where it reported Blob width/height as pts, but Android reported px
+	// And worse - numbers not divisble by the device scale (2, 3, etc) we could not reliably reproduce the *real* pixel size
+	// i.e. a 10 x 10 pixel image/view on a 3x device woudl report width/height of 3 and scale of 3, so just multiplying those we'd get 9
+	// when the real image was actually 10px.
+	// However, natively we *can* properly generate true pixel size because image would report scale like 3.33 that we coudl multiply by before returning
+	it('image dimensions should be reported in pixels', finish => {
+		win = Ti.UI.createWindow();
+		const view = Ti.UI.createView({
+			backgroundColor: 'green',
+			width: '11px',
+			height: '13px'
+		});
+		win.add(view);
+		win.addEventListener('postlayout', function postlayout() {
+			win.removeEventListener('postlayout', postlayout); // only run once
+			try {
+				const blob = view.toImage();
+				should(blob.width).equal(11);
+				should(blob.height).equal(13);
+			} catch (e) {
+				return finish(e);
+			}
+			finish();
+		});
+		win.open();
+	});
+});