Fixed gasp support bugs per #738

Author: Balearica

src/opentype.mjs

@@ -310,8 +310,13 @@ function parseBuffer(buffer, opt={}) {
                 metaTableEntry = tableEntry;
                 break;
             case 'gasp':
-                table = uncompressTable(data, tableEntry);
-                font.tables.gasp = gasp.parse(table.data, table.offset);
+                try {
+                    table = uncompressTable(data, tableEntry);
+                    font.tables.gasp = gasp.parse(table.data, table.offset);
+                } catch (e) {
+                    console.warn('Failed to parse gasp table, skipping.');
+                    console.warn(e);
+                }
                 break;
             case 'SVG ':
                 table = uncompressTable(data, tableEntry);

src/tables/gasp.mjs

@@ -34,9 +34,9 @@ function makeGaspTable(gasp) {
         {name: 'numRanges', type: 'USHORT', value: gasp.numRanges},
     ]);
 
-    for (let i in gasp.numRanges) {
-        result.fields.push({name: 'rangeMaxPPEM', type: 'USHORT', value: gasp.numRanges[i].rangeMaxPPEM});
-        result.fields.push({name: 'rangeGaspBehavior', type: 'USHORT', value: gasp.numRanges[i].rangeGaspBehavior});
+    for (let i in gasp.gaspRanges) {
+        result.fields.push({name: 'rangeMaxPPEM', type: 'USHORT', value: gasp.gaspRanges[i].rangeMaxPPEM});
+        result.fields.push({name: 'rangeGaspBehavior', type: 'USHORT', value: gasp.gaspRanges[i].rangeGaspBehavior});
     }
 
     return result;