JSAR Alpha Changelog

The alpha version of JSAR is the first version of the project.

v0.8.2

Fixes

• Fix the commandbuffer responses dispatching in client-side graphics

v0.8.1

Improvements

• Optimize rendering pipeline to support offscreen rendering correctly.
• Speed up the graphics initialization of each content process.

Fixes

• Correct the FCP timing for actual writing to the color buffer in the shared render target.

v0.8.0

New Features & Improvements

Rendering Enhancements

• Renderer Pipeline Overhaul
  • Replaced single onFrame tick with discrete render passes for finer-grained control over each rendering stage
  • Introduced UnityRenderPassEvent and dispatches per-pass events in OnUnityRenderEvent
  • Added new lifecycle methods (onBeforeRendering, onOpaquesRenderPass, onTransparentsRenderPass, onAfterRendering) in TrEmbedder and TrConstellation
  • Refactored renderer interfaces and updated OpenGL example to utilize new pass methods
• Context Management
  • Introduced new ContextGLHost/ContextGLApp classes to replace legacy context storage
  • Added iterateContentRenderers API for enhanced renderer iteration
  • Implemented framebuffer attachment helpers with improved debug output including stencil state

Inspector & Debugging

• Monitoring Capabilities:
  • Extended inspector with new /json/statistics endpoint for better runtime monitoring
  • Enhanced debug output with stencil buffer state information

DOM Updates

• Content Manipulation
  • Added support for setting textContent property
  • Enhanced DOM element manipulation capabilities

XML Processing

• Parser Improvements
  • Added support for parsing script/style tags as plain character data.
  • Improved XML parsing reliability for web content

Developer Experience

• Tracing & Diagnostics:
  • Added trace support for generate-document capability in threepio
  • Enhanced debugging and development workflow

HTML & CSS Features

• HTML Element Enhancements:
  • Added support for rendering <canvas> elements via Web Canvas API
• CSS Features:
  • Added support for absolute and fixed positioning.
  • Added support for unit in transform property.

Fixes & Optimizations

Bug Fixes

• Connection Management: Fixed invalid connection handling from forked child processes in hived
• Build System: Resolved lint errors in the build process
• Stencil Buffer: Addressed stencil buffer issues through renderer refactoring (#92)

Maintenance

• Dependencies: Upgraded jsar-dom version for improved compatibility
• Animations: Updated animation system components

v0.7.2

New Features & Improvements

Rendering Enhancements

• WebGL Improvements:
  • Optimized WebGL texture handling with anisotropic filtering.
  • Improved support for the EXT_texture_filter_anisotropic extension.
  • Enhanced WebGL context attributes for better XR compatibility.

DOM Updates

• Event Handling:
  • Added new event constructor types including MouseEvent, PointerEvent, and XRSessionEvent.
  • Enhanced EventTarget to provide detailed event type mappings and dispatching.
• Document Features:
  • Introduced Document.timeline for animation timelines.
  • Enhanced Document.appendStyleSheet() to manage styles dynamically.

HTML Enhancements

• Image Element:
  • Improved <img> element to handle onload and onerror events asynchronously.
  • Optimized image decoding with fallback mechanisms for error handling.
• Web Content Updates:
  • Added support for logical dimensions (logicalWidth and logicalHeight) for web content rendering.
  • Improved device pixel ratio handling in WebContent.

Fixes & Optimizations

Performance Optimizations

• Rendering Pipeline:
  • Optimized text and element rendering by marking dirty nodes and reducing unnecessary updates.
  • Improved layout computation efficiency for dynamic content.
• Event Dispatch:
  • Fixed hit testing for mouse events to handle mouseleave and mouseout scenarios properly.

Bug Fixes

• Fixed issues with CSSStyleDeclaration caching to ensure seamless style updates.
• Resolved memory leaks in image decoding processes.
• Addressed rendering bugs for logical dimensions in WebContent.
• Fixed service memory leaks in destroying content processes.
• Added maximum size for the image and texture at client-side and server-side to prevent out of memory issues.
• Fixed the resource caching issues, now the caching follows the standard HTTP caching rules.

v0.7.1

​​New Features & Improvements​​

​​Layout System Overhaul​​

• ​​Refactored layout system​​ to align with the standard ​​CSS Box Model​​.
  • Added ​​scrolling and overflow support​.
  • Introduced ​​CSS Grid Layout​​ support.

New DOM APIs

• Node Manipulation
  • Node.previousSibling
  • Node.replaceChild()
  • Node.removeChild()
  • Node.cloneNode()
  • Node.nextSibling
  • Node.insertBefore()
• ​​Element Properties & Methods
  • Element.innerHTML (getter & setter)
  • Element.before() & Element.after()
• Element Events
  • click – Fired when the primary button is clicked.
  • mousedown – Fired when the primary button is pressed.
  • mouseup – Fired when the primary button is released.
  • mousemove – Fired when the mouse moves over the element.
  • mouseover – Fired when the mouse enters the element.
  • mouseout – Fired when the mouse leaves the element.
• ​​Document APIs
  • Document.querySelector() & Document.querySelectorAll().
  • Document.createTextNode().
  • Added DocumentFragment support.

​​HTML & CSS Enhancements​​

• ​​Dataset Support​​ – Added data-* attribute handling for HTML elements.
• ​​MutationObserver​​ – Now supports observing DOM tree changes.
• ​​New HTML Elements
  • <link> (HTMLLinkElement) – Supports loading external CSS via href.
  • <template> (HTMLTemplateElement)
  • ​​Semantic Elements:​​ <header>, <footer>, <main>, <section>.
• CSS Properties
  • text-transform – Supports uppercase, lowercase, and capitalize.

​​Performance Optimizations​​

• ​​ECS (Entity-Component-System):​​
  • Optimized queryEntities() with a ​​new caching system​​.
• Rendering
  • Improved efficiency by ​​skipping rendering of overflow images​​.

v0.7.0

• Supports the rendering for HTML elements with high performance, both elements rendering in the two draw calls.
• Supports update the elements in 3D via the CSS transform functions such as translate, rotate, and scale.
• Open as HTML document by default.
• Add inspector support to debug the rendering backend issues.

v0.6.0

• HTML is introduced as the main entry point to start an application.
  • Include the following elements (element rendering is not working yet):
    • <audio>
    • <body>
    • <canvas>
    • <div>
    • <head>
    • <html>
    • <img>
    • <meta>
    • <p>
    • <script>
    • <span>
    • <video>
  • Add scripting and module system support:
    • Scripting: JavaScript & TypeScript
    • ECMAScript Modules
  • Add Web Canvas API: HTMLCanvasElement and OffscreenCanvas.
  • Add location object to support parsing the request URL.
  • Add window.open(url) to open a new window (this depends on the embedder).
  • Add window.close() to close the current application.
  • Add document.head and document.body to access the head and body elements.
  • Add getElementById(id) to get an element by its ID.
  • Add getElementsByTagName(tagName) and getElementsByName(name) to get elements by tag name and name.
• WebGL:
  • Fix the extension OVR_multiview2 constant values.
  • Implement the WebGL method: gl.hint().
  • Implement the WebGL method: gl.lineWidth().
  • Implement the WebGL method: gl.texParameterf().
• Support running three.js projects in HTML.
• Support running Babylon.js projects in HTML.

v0.5.0

• Added ability to support Unity Universal RP.
• Added ability to support more stereo rendering modes: SinglePass, SinglePassInstanced, and SinglePassMultiview.
• Fixed the GLES state managment for stencil buffer and color mask.

v0.4.0

• Added the WebGL 1.0 APIs.
• Added the WebGL 2.0 APIs partially.
• Added the WebXR Device APIs:
  • Rendering: XRFrame, XRView, XRViewport, XRWebGLLayer
  • Input Sources: XRInputSource, XRInputSourceArray, XRInputSourceEvent
  • Spaces: XRSpace, XRReferenceSpace, XRViewSpace, XRLocalSpace, XRWorldSpace
• Added the basic input sources: gaze and hand.
• Added the audio implementation with the audio spatialization support.