Release Notes 1.47.0

Changelog

Version 1.47.0

Released 07 Nov 2023

Feature	Implemented `ResizeObserver` API
Enhancement	Image-rendering support for border images
Enhancement	Added support for copy and paste in the Elements tab of the Inspector
Enhancement	HTML preloading now ignores query parameters from URLs when storing and serving HTML files from the cache
Enhancement	Added support for the new `rgb()` functional notation syntax
Enhancement	The maximum number of initiators for Recalculate Styles/Layout events defaults to 0 now. That's because getting the initiators can skew the Inspector performance profiling results. Clients can set the maximum count manually by using the JavaScript `engine.setInspectorInitatorsUpperBound(count)` function.
Enhancement	Added partial support for keyframe rules to the `CSSStyleSheet.insertRule()` API
Enhancement	The Player uses the system `OpenAL.framework` on Mac OS
Enhancement	Added documentation how mouse related behavior works when the mouse is idle
Enhancement Unity	Add `IVirtualAllocator` implementation for Sony PlayStation
Enhancement Unity	Add `IVirtualAllocator` implementation for Microsoft Windows and Xbox
Enhancement Unity	Add `IVirtualAllocator` implementation for Nintendo Switch
Enhancement Unity	Added support for binary messages in WebSocket implementation
Enhancement Unreal Engine	Removed legacy code for controlling `OnAssetSaved` callbacks for atlases
Enhancement Unreal Engine	Added `IVirtualAllocator` implementation for Microsoft Windows and Xbox
Enhancement Unreal Engine	Added `IVirtualAllocator` implementation for Sony PlayStation 5
Enhancement Unreal Engine	Added `IVirtualAllocator` implementation for Nintendo Switch
Fix	Fixed broken surface partitioning in evaluation builds
Fix	Fixed accumulating memory caused by `requestAnimationFrame` callbacks
Fix	Fixed assert when trying to draw background image on 0 background size
Fix	Fixed assert for SVG properties passed to `style.setProperty`
Fix	Fixed parser errors due to HTML tags in CSS comments
Fix	Fixed infinite recursion when specifying default font family as one of the generic font family keywords
Fix	Fixed `OnUserImageDropped` being called after rendering resources are freed
Fix Unity	Fixed crash when domain reloading is disabled in Unity
Fix Unity	Fixed crash on Xbox when the project quality is set to 'Very Low'''
Fix Unity	Fixed horizontal scroll touch gestures
Fix Unity	Fixed losing focus on input fields on platforms with virtual keyboards
Fix Unity	Ensure the proper disposal of the Library params object
Fix Unreal Engine	Added low level guard to prevent hitting a potential assert when loading Atlas textures

What’s new

Rendering

Refined luminance calculation

The relative luminance function for color blending is now based on the BT.709 standard, which is used in Firefox and Chrome. Elements in with opacity now look more similar to Chrome and Firefox.

Migration guide

Pointer Compression on Sony PlayStation 5

Starting with this release, Gameface uses V8 Pointer Compression on Sony PlayStation 5. This feature provides up to 40% memory savings for the JavaScript heap and requires initializing Gameface library with an instance of the IVirtualAllocator. A sample implementation is provided in Modules/Allocators.

Adjusting luminance calculation in CohColorMixingPS

The relative luminance function in CohColorMixingPS.hlsl has been updated to match the one used in Chrome/Firefox. The current W3C recommendation cites the BT.601 formula and has no mention of the formula, however, the BT.709 formula is used in Chromium for filtering (see RenderSurfaceFilters::BuildImageFilter and GetGrayscaleMatrix). If you would like to retain the old behavior and stay compliant to W3C, uncomment #define LUM_BT601.

Before:

...
float Lum(float3 color)
{
  return 0.3 * color.r + 0.59 * color.g + 0.11 * color.b;
}
...

After:

...
float Lum(float3 color)
{
  return 0.2126f * color.r + 0.7152f * color.g + 0.0722f * color.b;
}
...