64-bit Only
Only 64-bit binaries (x86_64/amd64/arm64) are offered; upstream JavaScriptCore dropped 32-bit support.
App Development
Build standalone desktop apps with Ultralight.
Blending Modes
Custom blend mode for color-accurate results when dispatching DrawGeometry commands.
C API
Use Ultralight via its C API.
C++ API
Use Ultralight via its C++ API.
Custom Surface Implementation
Inherit from Surface and handle virtual functions to paint directly into your own memory.
Game Integration
Integrate Ultralight into games or game engines.
GPU-Accelerated Views
Enable ViewConfig::is_accelerated to use GPU rendering on views.
GPUDriver API
Subclass GPUDriver to handle texture creation, buffer management, and shader binding.
GPUDriver API
GPU rendering to a texture.
ImageSource API
Use the ImageSource API to display custom textures in web pages.
OpenGL PBO Support
Example shows painting into OpenGL PBOs for lower-latency texture uploads.
Samples
Provides sample projects to demonstrate the Ultralight API.
Shader Programs
Supports kShaderType_Fill and kShaderType_FillPath shaders for CSS transforms and drawing.
Surface API
CPU rendering to a pixel buffer.
Surface Registration
Define a SurfaceFactory to allow the library to create/destroy custom surfaces.
View Configuration
Configure views for rendering, including acceleration settings.
View Management
Manages Views, high-level rendering, input translation, resource policies, and event dispatch.
Windows/MSVC Linking
Instructions for linking Ultralight libraries in Visual Studio on Windows.