Fixes reading Type1 FontBBox data for usWin values

src/core/fonts.js

@@ -5205,13 +5205,21 @@ var Type1Parser = (function Type1ParserClosure() {
 
               for (var j = 0; j < size; j++) {
                 var token = this.getToken();
-                if (token === 'dup') {
-                  var index = this.readInt();
-                  this.getToken(); // read in '/'
-                  var glyph = this.getToken();
-                  encoding[index] = glyph;
-                  this.getToken(); // read the in 'put'
+                // skipping till first dup or def (e.g. ignoring for statement)
+                while (token !== 'dup' && token !== 'def') {
+                  token = this.getToken();
+                  if (token === null) {
+                    return; // invalid header
+                  }
                 }
+                if (token === 'def') {
+                  break; // read all array data
+                }
+                var index = this.readInt();
+                this.getToken(); // read in '/'
+                var glyph = this.getToken();
+                encoding[index] = glyph;
+                this.getToken(); // read the in 'put'
               }
             }
             if (properties.overridableEncoding && encoding) {
@@ -5219,6 +5227,13 @@ var Type1Parser = (function Type1ParserClosure() {
               break;
             }
             break;
+          case 'FontBBox':
+            var fontBBox = this.readNumberArray();
+            // adjusting ascent/descent
+            properties.ascent = fontBBox[3];
+            properties.descent = fontBBox[1];
+            properties.ascentScaled = true;
+            break;
         }
       }
     }

test/pdfs/.gitignore

@@ -29,6 +29,7 @@
 !TAMReview.pdf
 !issue918.pdf
 !issue1905.pdf
+!issue2833.pdf
 !rotated.pdf
 !issue1249.pdf
 !smaskdim.pdf

test/test_manifest.json

@@ -33,6 +33,13 @@
        "type": "load",
        "about": "PDF with undefined stream length."
     },
+    {  "id": "issue2833",
+       "file": "pdfs/issue2833.pdf",
+       "md5": "7bc6e17c41586155c188d7408bcb9ab5",
+       "rounds": 1,
+       "lastPage": 1,
+       "type": "eq"
+    },
     {  "id": "issue2881",
        "file": "pdfs/issue2881.pdf",
        "md5": "ea6ade27d2cb146676d23dcd6605d5ee",