Helmut Januschka hjanuschka

JXL Decoder for Chromium using jxl-rs

This is the Chromium/Blink JXL image decoder implementation using the pure-Rust jxl-rs library.

Architecture

┌─────────────────────────────────────────────────────────────┐
│                    Blink ImageDecoder                       │
│ (jxl_image_decoder.cc/h) │

JXL Decoder: Simplified Wrapper Using jxl-rs Native Output

Overview

Based on changes to jxl-rs that add:

FFI-friendly API integrated directly into JxlDecoderInner
DecoderState enum for runtime state tracking
Direct RGBA buffer output with JxlPixelFormat (U8, U16, F16, F32)
Streaming input with process_with_input() and decode_frame()
Helper methods on JxlBasicInfo (has_alpha(), animation_timing())

How to Fix BrowserJS Abort Issue - V8 Termination Needs Yield Points

Summary

Good news: CL 7110745 is working correctly (all 31 bots passed). The issue is that V8's TerminateExecution() can only interrupt JavaScript at yield points, and the current sitegeist wrapper doesn't create them.

The Problem

When you call chrome.userScripts.terminate(), it invokes v8::Isolate::TerminateExecution(). However, this only works when JavaScript yields control back to the event loop.

Tested with: Xcode 15.4 (SDK 14.5)

Apply

cd /path/to/chromium/src
git apply 1.patch
autoninja -C out/Default chrome

chrome.userScripts.execute() with Cancellation Support

New API Overview

The chrome.userScripts.execute() now supports script cancellation through execution IDs:

1. Execute with optional executionId (handle pattern)

const results = await chrome.userScripts.execute({
 js: [{ code: wrapperCode }],

Setup testing environment

ClassicPress

bin/install-cp-tests.sh  DBNAME DBUSER DBPASS DBIP:DBPORT master false

master == the version

	# Chromium Coredump Fix - Corrupted Sync Data

	## Symptom
	Chromium crashes immediately on launch with SIGTRAP coredump.

	## Cause
	Corrupted `Sync Data/LevelDB` database in the Chromium profile.

	## Fix
	```bash

	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<title>Orca Accessibility Test - Named Forms as Landmarks</title>
	<style>
	body { font-family: sans-serif; max-width: 800px; margin: 40px auto; padding: 20px; }
	section, form, nav, aside { border: 1px solid #ccc; padding: 15px; margin: 15px 0; }
	h1, h2, h3 { color: #333; }
	label { display: block; margin: 10px 0 5px; }

	#include "skia.h"

	#include <stdexcept>
	#include <wrl/client.h>
	#include <dwrite.h>


	Skia::Skia() {
	mgr = SkFontMgr_New_DirectWrite(); // Platform-specific for Windows
	}


	# BLACKFIRE.io setup
	RUN version=$(php -r "echo PHP_MAJOR_VERSION.PHP_MINOR_VERSION;") \
	&& wget -O /tmp/blackfire-probe.tar.gz https://blackfire.io/api/v1/releases/probe/php/linux/amd64/$version \
	&& tar zxpf /tmp/blackfire-probe.tar.gz -C /tmp \
	&& mv /tmp/blackfire-*.so $(php -r "echo ini_get('extension_dir');")/blackfire.so \
	&& printf "extension=blackfire.so\nblackfire.agent_socket=tcp://blackfire:8707\n" > $PHP_INI_DIR/conf.d/blackfire.ini