Fuzzy-match the fontName, for TrueType Collection fonts, where the "name"-table is wrong (issue 13193)

The fontName, as defined in the PDF document, cannot be found in *any* of the "name"-tables in the TrueType Collection font. To work-around that, this patch adds a *fallback* code-path to allow using an approximately matching fontName rather than outright failing.

src/core/fonts.js

@@ -1554,6 +1554,8 @@ var Font = (function FontClosure() {
 
       function readTrueTypeCollectionData(ttc, fontName) {
         const { numFonts, offsetTable } = readTrueTypeCollectionHeader(ttc);
+        const fontNameParts = fontName.split("+");
+        let fallbackData;
 
         for (let i = 0; i < numFonts; i++) {
           ttc.pos = (ttc.start || 0) + offsetTable[i];
@@ -1569,16 +1571,42 @@ var Font = (function FontClosure() {
 
           for (let j = 0, jj = nameTable.length; j < jj; j++) {
             for (let k = 0, kk = nameTable[j].length; k < kk; k++) {
-              const nameEntry = nameTable[j][k];
+              const nameEntry =
-              if (nameEntry && nameEntry.replace(/\s/g, "") === fontName) {
+                nameTable[j][k] && nameTable[j][k].replace(/\s/g, "");
+              if (!nameEntry) {
+                continue;
+              }
+              if (nameEntry === fontName) {
                 return {
                   header: potentialHeader,
                   tables: potentialTables,
                 };
               }
+              if (fontNameParts.length < 2) {
+                continue;
+              }
+              for (const part of fontNameParts) {
+                if (nameEntry === part) {
+                  fallbackData = {
+                    name: part,
+                    header: potentialHeader,
+                    tables: potentialTables,
+                  };
+                }
               }
             }
           }
+        }
+        if (fallbackData) {
+          warn(
+            `TrueType Collection does not contain "${fontName}" font, ` +
+              `falling back to "${fallbackData.name}" font instead.`
+          );
+          return {
+            header: fallbackData.header,
+            tables: fallbackData.tables,
+          };
+        }
         throw new FormatError(
           `TrueType Collection does not contain "${fontName}" font.`
         );

test/pdfs/.gitignore

@@ -385,6 +385,7 @@
 !issue9278.pdf
 !annotation-text-without-popup.pdf
 !annotation-underline.pdf
+!issue13193.pdf
 !annotation-underline-without-appearance.pdf
 !issue269_2.pdf
 !annotation-strikeout.pdf

test/test_manifest.json

@@ -3095,6 +3095,12 @@
        "link": true,
        "type": "eq"
     },
+    {  "id": "issue13193",
+       "file": "pdfs/issue13193.pdf",
+       "md5": "38cf058f58b7dc5dc54e1602580936a7",
+       "rounds": 1,
+       "type": "eq"
+    },
     {  "id": "issue1655",
        "file": "pdfs/issue1655r.pdf",
        "md5": "569f48449ba57c15c4f9ade151a651c5",