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Merge pull request #21544 from Snuffleupagus/extractFontProgram-lenIV

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Lookup "lenIV" inline in the `Type1Parser.prototype.extractFontProgram` method
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Tim van der Meij 2026-07-05 19:20:02 +02:00 committed by GitHub
commit f03e18f336
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1 changed files with 11 additions and 7 deletions
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18
src/core/type1_parser.js
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@ -565,7 +565,7 @@ class Type1Parser {
privateData, privateData,
}, },
}; };
let token, length, data, lenIV; let token, length, data;
// Some fonts (e.g. those embedded in issue18548.pdf) define a second // Some fonts (e.g. those embedded in issue18548.pdf) define a second
// `/Subrs` and `/CharStrings` block that the PostScript runtime selects // `/Subrs` and `/CharStrings` block that the PostScript runtime selects
// conditionally (e.g. high-resolution variants). Testing with other // conditionally (e.g. high-resolution variants). Testing with other
@ -603,8 +603,10 @@ class Type1Parser {
length = this.readInt(); length = this.readInt();
this.getToken(); // read in 'RD' or '-|' this.getToken(); // read in 'RD' or '-|'
data = length > 0 ? stream.getBytes(length) : new Uint8Array(0); data = length > 0 ? stream.getBytes(length) : new Uint8Array(0);
lenIV = privateData.get("lenIV"); const encoded = this.readCharStrings(
const encoded = this.readCharStrings(data, lenIV); data,
privateData.get("lenIV")
);
this.nextChar(); this.nextChar();
token = this.getToken(); // read in 'ND' or '|-' token = this.getToken(); // read in 'ND' or '|-'
if (token === "noaccess") { if (token === "noaccess") {
@ -632,8 +634,10 @@ class Type1Parser {
length = this.readInt(); length = this.readInt();
this.getToken(); // read in 'RD' or '-|' this.getToken(); // read in 'RD' or '-|'
data = length > 0 ? stream.getBytes(length) : new Uint8Array(0); data = length > 0 ? stream.getBytes(length) : new Uint8Array(0);
lenIV = privateData.get("lenIV"); const encoded = this.readCharStrings(
const encoded = this.readCharStrings(data, lenIV); data,
privateData.get("lenIV")
);
this.nextChar(); this.nextChar();
token = this.getToken(); // read in 'NP' or '|' token = this.getToken(); // read in 'NP' or '|'
if (token === "noaccess") { if (token === "noaccess") {
@ -650,9 +654,9 @@ class Type1Parser {
// *Blue* values may contain invalid data: disables reading of // *Blue* values may contain invalid data: disables reading of
// those values when hinting is disabled. // those values when hinting is disabled.
if ( if (
HINTING_ENABLED &&
blueArray.length > 0 && blueArray.length > 0 &&
blueArray.length % 2 === 0 && blueArray.length % 2 === 0
HINTING_ENABLED
) { ) {
privateData.set(token, blueArray); privateData.set(token, blueArray);
} }