Fix font cache collision for fonts with missing postscript name or bad TTF metadata #1384 #691

Author: liborm85

CHANGELOG.md

@@ -6,6 +6,7 @@
 - Update linebreak to 1.1
 - Add support for spot colors
 - Fix sets tab order to "Structure" when a document is tagged
+- Fix font cache collision for fonts with missing postscript name or bad TTF metadata
 - Fix measuring text when OpenType features are passed in to .text()
 
 ### [v0.15.2] - 2024-12-15

lib/mixins/fonts.js

@@ -1,5 +1,10 @@
 import PDFFontFactory from '../font_factory';
 
+const isEqualFont = (font1, font2) => {
+  // compare font name table
+  return (JSON.stringify(font1.font._tables?.name?.records) === JSON.stringify(font2.font._tables?.name?.records))
+}
+
 export default {
   initFonts(defaultFont = 'Helvetica') {
     // Lookup table for embedded fonts
@@ -52,7 +57,7 @@ export default {
 
     // check for existing font familes with the same name already in the PDF
     // useful if the font was passed as a buffer
-    if ((font = this._fontFamilies[this._font.name])) {
+    if ((font = this._fontFamilies[this._font.name]) && isEqualFont(this._font, font)) {
       this._font = font;
       return this;
     }