Fixes function array support for radial/axial pattern

src/pattern.js

@@ -115,11 +115,29 @@ Shadings.RadialAxial = (function RadialAxialClosure() {
     this.extendEnd = extendEnd;
 
     var fnObj = dict.get('Function');
-    if (isArray(fnObj))
-      error('No support for array of functions');
-    if (!isPDFFunction(fnObj))
-      error('Invalid function');
-    var fn = PDFFunction.parse(xref, fnObj);
+    var fn;
+    if (isArray(fnObj)) {
+      var fnArray = [];
+      for (var j = 0, jj = fnObj.length; j < jj; j++) {
+        var obj = xref.fetchIfRef(fnObj[j]);
+        if (!isPDFFunction(obj)) {
+          error('Invalid function');
+        }
+        fnArray.push(PDFFunction.parse(xref, obj));
+      }
+      fn = function radialAxialColorFunction(arg) {
+        var out = [];
+        for (var i = 0, ii = fnArray.length; i < ii; i++) {
+          out.push(fnArray[i](arg)[0]);
+        }
+        return out;
+      };
+    } else {
+      if (!isPDFFunction(fnObj)) {
+        error('Invalid function');
+      }
+      fn = PDFFunction.parse(xref, fnObj);
+    }
 
     // 10 samples seems good enough for now, but probably won't work
     // if there are sharp color changes. Ideally, we would implement

test/pdfs/issue2006.pdf.link

@@ -0,0 +1 @@
+http://pages.sencha.com/rs/sencha/images/Sencha-WP-Dev-Mgrs-Guide-to-HTML5.pdf

test/test_manifest.json

@@ -713,6 +713,14 @@
       "link": true,
       "type": "eq"
     },
+    {  "id": "issue2006",
+      "file": "pdfs/issue2006.pdf",
+      "md5": "71ec73831ece9b508ad20efa6ff28642",
+      "rounds": 1,
+      "pageLimit": 1,
+      "link": true,
+      "type": "eq"
+    },
     {  "id": "issue1729",
       "file": "pdfs/issue1729.pdf",
       "md5": "29b0eddc3e1dcb23a44384037032d470",