Fix iOS 10.3 base64 image tainting canvas (Fix #1151)

src/Feature.js

@@ -25,6 +25,38 @@ const testRangeBounds = document => {
     return false;
 };
 
+// iOS 10.3 taints canvas with base64 images unless crossOrigin = 'anonymous'
+const testBase64 = (document: Document): Promise<boolean> => {
+    const img = new Image();
+    const canvas = document.createElement('canvas');
+    const ctx = canvas.getContext('2d');
+
+    return new Promise(resolve => {
+        // Single pixel base64 image renders fine on iOS 10.3???
+        // TODO add a smaller base64 image that still fails on iOS 10.3
+        img.src = "data:image/jpeg;base64,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";
+
+        const onload = () => {
+            try {
+                ctx.drawImage(img, 0, 0);
+                canvas.toDataURL();
+            } catch (e) {
+                return resolve(false);
+            }
+
+            return resolve(true);
+        };
+
+        img.onload = onload;
+
+        if (img.complete === true) {
+            setTimeout(() => {
+                onload();
+            }, 500);
+        }
+    });
+};
+
 const testSVG = document => {
     const img = new Image();
     const canvas = document.createElement('canvas');
@@ -54,6 +86,13 @@ const FEATURES = {
         const value = testSVG(document);
         Object.defineProperty(FEATURES, 'SUPPORT_SVG_DRAWING', {value});
         return value;
+    },
+    // $FlowFixMe - get/set properties not yet supported
+    get SUPPORT_BASE64_DRAWING() {
+        'use strict';
+        const value = testBase64(document);
+        Object.defineProperty(FEATURES, 'SUPPORT_BASE64_DRAWING', {value});
+        return value;
     }
 };
 

src/ImageLoader.js

@@ -59,9 +59,15 @@ export default class ImageLoader {
         if (__DEV__) {
             this.logger.log(`Added image ${key.substring(0, 256)}`);
         }
-        this.cache[key] = new Promise((resolve, reject) => {
+
+        const imageLoadHandler = (supportsDataImages: boolean): Promise<Image> => {
+            return new Promise((resolve, reject) => {
                 const img = new Image();
                 img.onload = () => resolve(img);
+                //ios safari 10.3 taints canvas with data urls unless crossOrigin is set to anonymous
+                if (!supportsDataImages) {
+                    img.crossOrigin = 'anonymous';
+                }
 
                 img.onerror = reject;
                 img.src = src;
@@ -72,6 +78,11 @@ export default class ImageLoader {
                     }, 500);
                 }
             });
+        };
+
+        this.cache[key] = isInlineImage(src)
+            ? FEATURES.SUPPORT_BASE64_DRAWING.then(imageLoadHandler)
+            : imageLoadHandler(true);
         return key;
     }
 
@@ -122,9 +133,9 @@ export class ImageStore {
 }
 
 const INLINE_SVG = /^data:image\/svg\+xml/i;
-const INLINE_IMG = /^data:image\/.*;base64,/i;
+const INLINE_BASE64 = /^data:image\/.*;base64,/i;
 
-const isInlineImage = (src: string): boolean => INLINE_IMG.test(src);
+const isInlineImage = (src: string): boolean => INLINE_BASE64.test(src);
 
 const isSVG = (src: string): boolean =>
     src.substr(-3).toLowerCase() === 'svg' || INLINE_SVG.test(src);

tests/reftests/images/svg/node.html

@@ -20,6 +20,9 @@
                   style="fill:#40aa54;fill-opacity:1;stroke:#20552a;stroke-width:7.99999952;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none"/>
         </g>
     </svg>
+    <svg xmlns="http://www.w3.org/2000/svg" width="88" height="60" viewBox="0 0 88 60"><text xmlns="http://www.w3.org/2000/svg" font-family="Verdana" font-weight="700" text-anchor="middle" x="46" y="18">ABCDE</text><text xmlns="http://www.w3.org/2000/svg" font-family="Verdana" font-weight="700" text-anchor="middle" x="44" y="16" fill="white">ABCDE</text></svg>
+
+    <svg xmlns="http://www.w3.org/2000/svg" width="88" height="60" viewBox="0 0 88 60"><text xmlns="http://www.w3.org/2000/svg" font-family="Verdana" font-size="12px" font-weight="700" text-anchor="middle"><tspan fill="black" x="46" y="18">ABC</tspan><tspan fill="white" x="44" y="16">ABC</tspan><tspan fill="black" x="46" y="35">123</tspan><tspan fill="white" x="44" y="33">123</tspan></text></svg>
 </div>
 </body>
 </html>

tests/testrunner.js

@@ -95,14 +95,18 @@ const assertPath = (result, expected, desc) => {
                         testContainer.src = url + '?selenium&run=false&reftest&' + Math.random();
                         if (hasHistoryApi) {
                             // Chrome does not resolve relative background urls correctly inside of a nested iframe
+                            try {
                                 history.replaceState(null, '', url);
+                            } catch (e) {}
                         }
 
                         document.body.appendChild(testContainer);
                     });
                     after(() => {
                         if (hasHistoryApi) {
+                            try {
                                 history.replaceState(null, '', testRunnerUrl);
+                            } catch (e) {}
                         }
                         document.body.removeChild(testContainer);
                     });