Release Notes 1.53.0

What’s new

Rendering

GPU tessellator

An experimental GPU tessellation algorithm has been added to Renoir. You can enable it using the --use-fill-atlas-tessellation developer option. Fill paths are pre-processed in an atlas (on the GPU), which is later used to draw the final composited texture. The control points of cubic curves are uploaded to a vertex shader, where these are rasterized. This generally improves performance at the cost of more VRAM usage. The algorithm is used only on shapes that fit in a 1024x1024 texture. Larger shapes will be handled by the previous CPU-based solution.

Migration guide

Migrating to 1.53

Experimental GPU tessellation algorithm

If you rely on a custom backend and you would like to use the --use-fill-atlas-tessellation option, your custom backend has to support the following:

Shader type ST_FillPathAtlas
Pixel shader type PST_FillPathAtlas
Vertex type VT_FillPathAtlas
Renderer capability SupportsSingleChannelMSAATextures

Two new shaders have been added for the GPU tessellation: CohFillPathAtlasVS.hlsl and CohNullPS.hlsl. Cubic curves are rasterized in the vertex shader CohFillPathAtlasVS.hlsl (refer to the comment in the file for implementation details). Since the results are stored in a stencil buffer, The pixel shader CohNullPS.hlsl is a placeholder and has no effect on the final result. PST_FillPathAtlas needs to be handled by ST_StandardTexture (see the if (shaderType == 30) branch in CohShadeGeometry.ihlsl). The vertex type VT_FillPathAtlas must have the following layout (The structure is already defined in PipelineState.h):

struct FillPathAtlasVertex
{
  float4 Points01;
  float4 Points23;
  float2 FanPoint;
  float2 ResolveLevelAndIndex;
  unsigned CBData;
};

The renderer capability SupportsSingleChannelMSAATextures indicates whether the backend supports MSAA on single channel textures. If set to false, RGBA8 textures will be allocated instead of R8.

Changelog

Version 1.53.0

Released 15 May 2024

API	Added `mipsCount` member to `IAsyncResourceResponse` to mark how much mips a preloaded texture has
API	Altered `GPUMemoryInfo` structure to make it more compact
API	Added the `TextureObject` in `IUserResourcesListener` callbacks
Feature	Added support for tessellating SVGs on the GPU
Enhancement	Added support for HTML preloading for `XmlHttpRequests` and `innerHTML`
Enhancement	Added documentation for the `View::MouseLeave` API
Enhancement	Added support for the `'loadedmetadata'` event to html media elements
Enhancement Unity	Updated quick start documentation with examples of how to add a view to the scene
Enhancement Unity	Added a step by step guide for localization
Enhancement	Added API to retrieve GPU memory usage information
Enhancement Unity	Improved input handling for `CohtmlView` rendered inside a `UI Canvas`
Enhancement	Added support in desktop renderers (DirectX 11, DirectX12, OpenGL, Vulkan) for preloading mipmap textures
Enhancement Unity	The Unity package uses the Sony PlayStation 5 SDK 8.0
Enhancement Unity	The Unity package uses the Sony PlayStation 4 SDK 11.0
Enhancement	Added documentation for the canvas API support
Enhancement	Added origin information to warnings and errors when it is available
Fix Unity	Fixed setting the HTTP response headers from `UnityWebRequest`
Fix Unreal Engine	Fixed plugin loading issue on Linux due to a missing renoir library dependency
Fix Unity	Fixed crash on Xbox in HDRP mode due to synchronization issue
Fix	Fixed ascent and descent for preloaded fonts
Fix	Fixed a crash when using the API for custom media features on different threads
Fix	Fixed setting the prototype on custom elements getting upgraded when their class is defined
Fix	Fixed `getAnimations` to return only active animations
Fix	Fixed `classList` property to return the same object when available and avoid generating garbage
Fix Unity	Fixed a crash on exit in Unity3D editor when a WebSocket connection is still active
Fix	Fixed wrongly transitioned properties for discrete animations
Fix	Fixed `getAnimations` returning animations per property instead of per animation name
Fix	Fixed a crash when using SVG as background-image on an element with transform
Fix	Fixed transitions with negative delay incorrectly firing transition events
Fix	Fixed a crash if a texture for drawing is missing
Fix	Fixed rendering of textures in samples with OpenGL when filtering is set to `FilterLinear`
Fix	Fixed drawing of simple inline SVGs in `cohinline` paragraphs
Fix	Fixed image resources not getting unloaded after reducing the background images count
Fix	Fixed artifacts when using `border-image` with SVG
Fix	Fixed a leak when using transitions which could have caused crashes after garbage collection
Fix	Fixed a wrongly triggered debug assert when detaching elements with pending images
Fix	Fixed a crash when using `elementsFromPoint` over pseudo elements