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Ultralight— lightweight, pure-GPU, HTML UI engine for desktop apps and games.

Website | Join our Slack! | Browse API | Quick Start / Documentation | Follow on Twitter About Ultralight is a lightweight, cross-platform, pure-GPU, HTML rendering engine for desktop apps and games. It supports most modern
Information
Category: C/C++ / Miscellaneous
Watchers: 82
Star: 3.8k
Fork: 174
Last update: May 18, 2022
Resource links
https://github.com/ultralight-ux/ultralight

Website | Join our Slack! | Browse API | Quick Start / Documentation | Follow on Twitter

⚠️ This is a preview for v1.2!: Please bear with us as we update documentation and samples for the new release. A porting guide will be up soon. Visit our Slack for more info.

About

Ultralight is a lightweight, cross-platform, pure-GPU, HTML rendering engine for desktop apps and games. It supports most modern HTML5 and JavaScript features while still remaining small in binary size and memory usage.

API is currently available for C and C++, with bindings for more languages in development.

Base Memory Usage

Ultralight Electron
Windows 9 MB 72 MB
macOS 17 MB 97 MB
Linux 15 MB 136 MB

Base Distributable Size

Ultralight Electron
Windows 30 MB 147 MB
macOS 43 MB 163 MB
Linux 49 MB 179 MB

Comparison with Chromium

Ultralight Chromium
Renderer Proprietary (GPU) Skia (CPU) / GPU Compositor
Layout Engine WebCore (from WebKit) Blink
JavaScript Engine JavaScriptCore V8
IPC None (Single Process) Yes (Multi Process)

Architecture

Ultralight is a new port of WebKit combined with a new 2D GPU renderer intended specifically for embedding in apps and games.

Virtual GPU Renderer

The renderer emits virtual GPU commands that are translated into native GPU commands of the target platform at runtime. This approach makes it easy to embed Ultralight in games as well.

Low-Level Platform API

Ultralight grants developers the ability to override low-level system calls for deeper integration with applications. We currently provide APIs to customize File System and Font Loading but will soon be expanding this to Clipboard, Memory Allocation, Network Requests, and more.

Cross-Platform AppCore Runtime

AppCore is an optional, cross-platform desktop app runtime built on top of Ultralight that handles window creation, native event loops, native graphics drivers (D3D11, D3D12, Metal, OpenGL), and more.

You can use it to build desktop HTML apps in a manner similar to Electron. It's currently under active development and only supports single-window apps at this writing. A number of planned features (app icons, automatic packager, borderless windows with custom draggable titlebars, etc) are missing but on the way.

Usage Within Games

Ultralight is designed to integrate well into existing game engines. In this case you would just use the low-level Ultralight API (not AppCore) and implement the GPUDriver interface for your target platform (we recommend using the drivers and shader code in the AppCore repo as a base).

Licensing

Free License

Ultralight is free for non-commercial use and free for commercial use by companies with less than $100K gross annual revenue. For more info see LICENSE.txt

Commercial Licensing and Support

We offer commercial licensing, priority support, and source code. To learn more, please visit our website.

Getting the Latest SDK

You can get the latest SDK for each platform via the following links:

Getting Pre-Built Binaries for a Specific Commit

Pre-built binares are uploaded to the following S3 buckets every commit:

Click any of the links for an XML listing of available files.

Useful Links

Link URL
Join our Slack! https://chat.ultralig.ht
Browse API Headers https://github.com/ultralight-ux/Ultralight-API/
Docs / Getting Started https://docs.ultralig.ht
Follow Us on Twitter https://twitter.com/ultralight_ux
209 Open More issues
Closed

GPUDriverGL Does not work with GLFW.

Hello, I asked about this on Slack. And there seems to be a problem either with my code or with the GL driver code.

I am trying to render the view to the screen using render_target().texture_id. No texture is being displayed.

Here's my code:


#include <OpenGL/GPUDriverGL.h>//AppCore's GL Driver
#include <Ultralight/Ultralight.h>
#include <AppCore/AppCore.h>
#include <GLFW/glfw3.h>

using namespace ultralight;

int main() {
	GLFWwindow* window;
	
	if (!glfwInit())
		return -1;

	window = glfwCreateWindow(600, 600, "View", NULL, NULL);

	if (!window)
	{
		glfwTerminate();
		return -1;
	}
	
	glfwMakeContextCurrent(window);
	glewInit();
	glEnable(GL_TEXTURE_2D);
	Config config;
	config.face_winding = kFaceWinding_CounterClockwise; // CW in D3D, CCW in OGL
	config.device_scale_hint = 1.0;               // Set DPI to monitor DPI scale
	config.font_family_standard = "Segoe UI";     // Default font family
	GPUDriver* driver = new GPUDriverGL(1);
	Platform& platform = Platform::instance();
	platform.set_config(config);
	platform.set_gpu_driver(driver);
	
	auto UIRenderer = Renderer::Create();
	auto UIView = UIRenderer->CreateView(600, 600, true);
	UIView->LoadHTML("<h1>test</h1>");
	glClearColor(0, 0, 1, 1);
	
	while (!glfwWindowShouldClose(window))
	{	
		glClear(GL_COLOR_BUFFER_BIT);
		UIRenderer->Update();
		
		UIRenderer->Render();
		
		if (driver->HasCommandsPending()) {
			driver->DrawCommandList();
			driver->BindTexture(0,UIView->render_target().texture_id);
			glBegin(GL_QUADS);
			glTexCoord2f(0.0, 1.0);
			glVertex3f(-1.0f, -1.0f, 0.0f);
			glTexCoord2f(0.0, 0.0);
			glVertex3f(-1.0f, 1.0f, 0.0f);
			glTexCoord2f(1.0, 0.0);
			glVertex3f(1.0f, 1.0f, 0.0f);
			glTexCoord2f(1.0, 1.0);
			glVertex3f(1.0f, -1.0f, 0.0f);
			glEnd();
			glfwSwapBuffers(window);	
		}
		glfwPollEvents();
	}
	glfwTerminate();
	return 0;
}

I see the clear color only (blue).

Is there anything wrong on my side ?

opened Jun 23, 2019 by tomerze 13
Closed

Mac OS/CMake: Duplicate rule when using Ninja

Summarize the Issue By default, I use the Ninja generator (since it is faster due to parallelization and because I have the CPU to run this properly) and did so when I wanted to build this project.

Steps to Reproduce

[email protected] ~/W/Git $ git clone --recursive https://github.com/ultralight-ux/ultralight.git
Klone nach 'ultralight' ...
remote: Enumerating objects: 176, done.
remote: Counting objects: 100% (176/176), done.
remote: Compressing objects: 100% (126/126), done.
remote: Total 1949 (delta 72), reused 117 (delta 44), pack-reused 1773
Empfange Objekte: 100% (1949/1949), 170.98 MiB | 4.59 MiB/s, Fertig.
Löse Unterschiede auf: 100% (909/909), Fertig.
Checke Dateien aus: 100% (344/344), Fertig.
[email protected] ~/W/Git $ cd ultralight/
[email protected] ~/W/G/ultralight $ mkdir out
[email protected] ~/W/G/ultralight $ cd out
[email protected] ~/W/G/u/out $ cmake -G Ninja ..
-- The C compiler identification is AppleClang 10.0.0.10001145
-- The CXX compiler identification is AppleClang 10.0.0.10001145
-- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc
-- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++
-- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Configuring done
-- Generating done
-- Build files have been written to: /Users/Ingwie/Work/Git/ultralight/out
[email protected] ~/W/G/u/out $ ninja
ninja: error: build.ninja:466: multiple rules generate ../samples/Info.plist.in [-w dupbuild=err]

Platform Info:

  • OS:
ProductName:	Mac OS X
ProductVersion:	10.14.3
BuildVersion:	18D109
  • SDK Version
$ git rev-parse HEAD
91298b7c0670f253a9a587e69cee1edb2cb920c1
bug 
opened Mar 19, 2019 by IngwiePhoenix 12
Closed

Add support for <select> dropdowns and other native chrome.

Native dropdowns currently crash, should expose these for handling by user in a modal callback.

Also other native chrome is not rendering correctly yet (radio buttons / checkboxes), should add a default CSS theme override for these elements.

bug 
opened Dec 20, 2018 by adamjs 11
Closed

UTF8 string length inconsistency

String8:

size_t​ ​sizeBytes​() ​const​ { ​return​ length_ * ​sizeof​(​char​); }

UTF8 can use up to 4 bytes per character.

This code is right for Ansi encoding, but not for UTF8.

opened Mar 4, 2022 by SupinePandora43 9
Closed

MinGW/GCC support?

Hello Ultralight team.

Thanks for your great and important work!

I'm wondering, are there any plans to support MinGW (aka GCC for Windows)? The overall compilation looks good but linking doesn't. There are no .a libraries for Windows provided and the linker complains about unresolved symbols.

Thanks, Arlen.

opened Aug 11, 2019 by Ptomaine 9
Closed

Browser: Google search results don't look good...at all.

Summarize the Issue After opening Google and entering a search query (which already caused a couple of fragments to be displayed which look like the page was partially being highlighted), the search results shown after hitting the search button look completely scrambled.

Steps to Reproduce image

Platform Info:

  • OS:
ProductName:	Mac OS X
ProductVersion:	10.14.3
BuildVersion:	18D109
  • SDK Version [e.g. 0.8, 0.9]
$ git rev-parse HEAD
9ea26b3bc2566662a4a01c6220d3fabfdc0a1dbf

In addition...

$ ./samples/Browser/Browser.app/Contents/MacOS/Browser
TODO: Image::loadPlatformResource missingImage
bug 
opened Mar 19, 2019 by IngwiePhoenix 9
Open

Help with Getting Started Tutorial

Greetings, I would like to try this wonderful project and I have found an error that although simple I have not been able to solve and I would like to know if someone can help me. Below I leave the error that throws me.

My system is ArchLinux x86_64 GNU/Linux

[ 72%] Built target UltralightSDK [ 81%] Linking CXX executable MyApp /usr/bin/ld: warning: libpcre.so.3, needed by /home/smarte/testing/ultralight-quick-start/build/SDK/bin/libglib-2.0.so.0, not found (try using -rpath or -rpath-link) /usr/bin/ld: /home/smarte/testing/ultralight-quick-start/build/SDK/bin/libglib-2.0.so.0: undefined reference to pcre_exec' /usr/bin/ld: /home/smarte/testing/ultralight-quick-start/build/SDK/bin/libglib-2.0.so.0: undefined reference topcre_study' /usr/bin/ld: /home/smarte/testing/ultralight-quick-start/build/SDK/bin/libglib-2.0.so.0: undefined reference to pcre_dfa_exec' /usr/bin/ld: /home/smarte/testing/ultralight-quick-start/build/SDK/bin/libglib-2.0.so.0: undefined reference topcre_fullinfo' /usr/bin/ld: /home/smarte/testing/ultralight-quick-start/build/SDK/bin/libglib-2.0.so.0: undefined reference to pcre_get_stringnumber' /usr/bin/ld: /home/smarte/testing/ultralight-quick-start/build/SDK/bin/libglib-2.0.so.0: undefined reference topcre_free' /usr/bin/ld: /home/smarte/testing/ultralight-quick-start/build/SDK/bin/libglib-2.0.so.0: undefined reference to pcre_config' /usr/bin/ld: /home/smarte/testing/ultralight-quick-start/build/SDK/bin/libglib-2.0.so.0: undefined reference topcre_compile2' /usr/bin/ld: /home/smarte/testing/ultralight-quick-start/build/SDK/bin/libglib-2.0.so.0: undefined reference to `pcre_get_stringtable_entries' collect2: error: ld returned 1 exit status make[2]: *** [CMakeFiles/MyApp.dir/build.make:113: MyApp] Error 1 make[1]: *** [CMakeFiles/Makefile2:111: CMakeFiles/MyApp.dir/all] Error 2 make: *** [Makefile:91: all] Error 2

opened May 22, 2022 by SantosJMM 0
Open

Sample 8 - Web Browser

This sample cannot be executed correctly in windows

opened May 9, 2022 by AppCpp 1
Open

Use gio's mime type functions

Right now FileSystem exposes GetFileMimeType(const String& path) requiring a library users to implement it by themselves. It can cause platform differences between windows (registry), macos (kUTTagClassMIMEType) and linux (if-else).

Since ultralight bundles gio, is it possible to use it instead?

Like in: https://stackoverflow.com/a/21552150/9765252

opened Apr 25, 2022 by SupinePandora43 0
Open

How to enable HiDPI support

Hi there, I am trying to get a simple app running using Ultralight, but I can't get high DPI scaling to work. I'm using Wayland on Linux with a 4K monitor (3840 x 2160) and everything is tiny - I tried the example app and all the sample apps in this repository. Is this something that can be fixed by setting some environment variable or do I have to update the code? Thanks for any advice

opened Apr 21, 2022 by SapuSeven 0
Open

fixed typo

null

opened Apr 21, 2022 by Paul-Austria 0
Open

SVG stroke-dasharray property having no effect

Hello from Mutate! We thought of displaying ability cooldowns by using a pie chart that would fill up in relation to % time remaining.

To realize this we utilized SVG with stroke-dasharray, which looks fine in chrome:

piechart_chrome

<html>
<head>
<style>
	circle {
		fill: #655;
		stroke: yellowgreen;
		stroke-width: 50;
		stroke-dasharray: 60 158; /* 2π × 25 ≈ 158 */
	}
	svg {
		transform: rotate(-90deg);
		background: #655;
		border-radius: 50%;
	}
</style>
</head>
	<body>
		<div>
			<svg width="100" height="100">
				<circle r="25" cx="50" cy="50" />
			</svg>
		</div>
	</body>
</html>

But now in our engine using Ultralight, there is no visual representation of stroke-dasharray: Ultralight version: Latest nightly build available today (on 07/04/2022).

piechart_ultralight

Please start supporting stroke-dasharray!

Jens Mutate

opened Apr 7, 2022 by DancingHedgehog 0

Contents

    psychonautwiki ul - High Level Bindings to Ultralight SDK
    ImVexed GPU based Electron on a diet
    leereilly :video_game: A list of popular/awesome videos games, add-ons, maps, etc. hosted on GitHub. Any genre. Any platform. Any engine.
    maierfelix Lightweight GPU accelerated HTML GUI for native JavaScript
    smart-fun SmartGL is a Graphic Engine for creating Android Games and Apps. It is based on OpenGL and handles 2D Sprites and 3D Textured Objects.
    dawsbot Ultralight Ethereum utilities for JS and TS
    flamableconcrete A curated list of awesome board games, card games, and party games
    BlazingDB BlazingSQL is a lightweight, GPU accelerated, SQL engine for Python. Built on RAPIDS cuDF.
    antonmks GPU database engine
    pokerfaceSad GPU Mounter is a kubernetes plugin which enables add or remove GPU resources for running Pods
    grantjenks Free Python Games
    grantjenks Free Python Games
    mstellmacher A lightweight desktop-engine for jQuery
    deepmind A highly-customisable gridworld game engine with some batteries included. Make your own gridworld games to test reinforcement learning agents!
    Famous Famous Engine a free and open source JavaScript rendering engine.
    BuddiesOfBudgie Budgie Desktop is a feature-rich, modern desktop.
    godotengine Godot Engine – Multi-platform 2D and 3D game engine
    rreusser Pure GPU, instanced, screen-projected lines for regl
    yue Build cross-platform desktop apps with system webview and native GUI widgets.
    feross Workshop: Build cross-platform desktop apps with Electron
    devxoul Pure DI in Swift
    Share this repo

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