QCefView

QCefView

[!NOTE]
QCefView is now licensed under LGPL-3.0 to enhance openness while providing stronger safeguards against patent claims. This change ensures clearer protection for contributors and downstream users regarding patent rights and redistribution.

Introduction

QCefView is a Qt-based QWidget that encapsulates CEF (Chromium Embedded Framework). With QCefView, you can build your application UI using modern frontend development techniques, boosting project efficiency while keeping UI and business logic decoupled. Most importantly, QCefView enables seamless CEF integration within Qt applications.

Discord Server: QCefView

Build Status

• OSR = Offscreen Rendering Mode
• NCW = Native Child Window Mode

Feature Status

| Platform | NCW CEF All Versions | OSR - Software Rendering CEF All Versions | OSR - Hardware Rendering

CEF 125+ | |---|:---:|:---:|:---:| |Windows | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: (DirectX 11) | |MacOS | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: (Metal) | |Linux | :heavy_check_mark: | :heavy_check_mark: | :x: WIP (OpenGL) |

WIP (Work In Progress): Features under development, no guaranteed release date.

Quick Start

Clone the Project

git clone https://github.com/CefView/QCefView.git

The dependency on CefViewCore has been converted to CMake FetchContent, meaning submodules are no longer required. Refer to: cmake/CefViewCoreConfig.cmake for more details.

Documentation

Find the latest documentation here:

• Documentation

These resources will help you quickly understand and integrate QCefView into your projects.

OSR Mode & Hardware Acceleration

QCefView supports CEF offscreen rendering mode (OSR), which is enabled by default. To disable OSR mode, set setWindowlessRenderingEnabled to false in the configuration:

QCefConfig config;

// OSR (Windowless Rendering) is enabled by default
// Set to false to disable OSR mode
config.setWindowlessRenderingEnabled(false);

Enabling Hardware Acceleration (CEF 125+)

Starting from CEF 125+, GPU resource sharing is generally available. QCefView now supports hardware acceleration for OSR mode. To enable it:

QCefSetting setting;

// Enable hardware renderer (only applicable in OSR mode)
setting.setHardwareAcceleration(true);

// Set frame rate limit
setting.setWindowlessFrameRate(240);

// Create the QCefView widget
auto qCefViewWidget = new QCefView("https://www.testufo.com/", &setting);

Windows Benchmark

QCefViewTest-Windows-Software-Rendering-FPS1000-Limit

• Average FPS: 200
• Average CPU: 10%

QCefViewTest-Windows-Hardware-Rendering-FPS1000-Limit

• Average FPS: 900
• Average CPU: 1%

macOS Benchmark

QCefViewTest-macOS-Software-Rendering-FPS1000-Limit

• Average FPS: 750
• Average CPU: 100% (Total 1000%)

QCefViewTest-macOS-Hardware-Rendering-FPS1000-Limit

• Average FPS: 930
• Average CPU: 60% (Total 1000%)

Contributing

We welcome contributions and suggestions! To maintain consistency, please ensure your code adheres to the style defined in .clang-format.

How You Can Contribute

• Solve an issue (e.g., answer a question in the Issues section or Gitter chat)
• Fix a bug or report one
• Improve documentation (even fixing typos helps!)

If you're interested in becoming a QCefView maintainer (e.g., merging PRs, triaging issues), please contact me via email: sheentianshen#gmail.com. I'm happy to help set the right permissions for you.

Let's build a better QCefView together!