Merge pull request #3750 from brendandahl/cidfonttype0c

Proper glyph selection for CIDFontType0C fonts.

src/core/fonts.js

@@ -5529,18 +5529,22 @@ var CFFFont = (function CFFFontClosure() {
       var unassignedUnicodeItems = [];
       var inverseEncoding = [];
       var gidStart = 0;
-      // Even though the CFF font may not actually be a CID font is could have
-      // CID information in the font descriptor.
-      if (this.properties.cidSystemInfo) {
-        // According to section 9.7.4.2 if the font is actually a CID font then
-        // we should use the charset to map CIDs to GIDs. If it is not actually
-        // a CID font then CIDs can be mapped directly to GIDs.
+      // According to section 9.7.4.2 CIDFontType0C glyph selection should be
+      // handled differently.
+      if (this.properties.subtype === 'CIDFontType0C') {
         if (this.cff.isCIDFont) {
+          // If the font is actually a CID font then we should use the charset
+          // to map CIDs to GIDs.
           inverseEncoding = charsets;
         } else {
-          for (var i = 0, ii = charsets.length; i < charsets.length; i++) {
+          // If it is NOT actually a CID font then CIDs should be mapped
+          // directly to GIDs.
+          inverseEncoding = [];
+          for (var i = 0, ii = cff.charStrings.count; i < ii; i++) {
             inverseEncoding.push(i);
           }
+          // Use the identity map for charsets as well.
+          charsets = inverseEncoding;
         }
       } else {
         for (var charcode in encoding) {

test/test_manifest.json

@@ -1162,6 +1162,13 @@
       "type": "eq",
       "about": "A CIDFontType0 font with a CFF font that isn't actually CID."
     },
+    {  "id": "bug921409",
+      "file": "pdfs/bug921409.pdf",
+      "md5": "920e88dde0f5436ebe0df0281e1c30ca",
+      "rounds": 1,
+      "type": "eq",
+      "about": "A CIDFontType0 font that actually has a Type1C font file."
+    },
     {  "id": "noembed-identity-2",
       "file": "pdfs/noembed-identity-2.pdf",
       "md5": "13b7d9ab9579d45c10bc8d499d087f21",