libpag: A C++ repository from joegana

Introduction

libpag is a real-time rendering library for PAG (Portable Animated Graphics) files that renders both vector-based and raster-based animations across most platforms, such as iOS, Android, macOS, Windows, Linux, and Web.

PAG is an open-source file format for recording animations. PAG files can be created and exported from Adobe After Effects with the PAGExporter plugin and previewed in the PAGViewer app, which you can get from pag.art, and both of them are available on both macOS and Windows.

PAG is now being used by 40+ Tencent apps, such as WeChat, Mobile QQ, Honor of Kings Mobile Game, Tencent Video, QQ Music, and so on, reaching hundreds of millions of users.

Advantages

Highly efficient file format

Benefiting from the highly efficient binary format design, PAG files can be decoded 10x faster than JSON files but also are about 50% smaller in file size when exporting the same animations. Designers can also ship beautiful animations with bitmaps or audiovisual media integrated into a single file easily without other attachments.

All AE features supported

While other solutions may only support exporting limited vector-based AE features, PAG supports exporting all AE animations into a single file by combining vector-based exporting with raster-based exporting techniques. Therefore, third-party plugin effects in AE can be exported as well.

Measurable performance

PAG provides a monitoring panel in PAGViewer that shows normalized performance data for PAG files, which helps designers to examine and optimize performance easily without developers. Along with dozens of automatic optimization techniques from the PAGExporter plugin, animations with cool visual effects and excellent performance now can be created more effectively.

Runtime editable animations

With the flexible editing APIs from PAG SDK, developers can easily change the layer structure of a single PAG file, mix multiple PAG files into one composition, or replace texts and images with all pre-designed animation effects applied at runtime. It reduces tons of coding work for product features like video templates.

System Requirements

iOS 9.0 or later
Android 4.4 or later
macOS 10.13 or later
Windows 7.0 or later
Chrome 69.0 or later (Web)
Safari 11.3 or later (Web)

Getting Started

We currently only publish precompiled libraries for iOS, Android, and Web. You can build libraries of other platforms from the source code. The latest releases can be downloaded from here.

iOS Integration

You can use the framework downloaded from the release page, or add libpag to your project by CocoaPods: Add the pod to your Podfile:

pod 'libpag'

And then run:

pod install

After installing the cocoapod into your project import libpag with

#import <libpag/xxx.h>

Android Integration

You can use the aar downloaded from the release page, or add libpag to your project by Maven:

Edit the build.gradle file in the root of your project, add mavenCentral() to repositories:

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.1'
    }
}

Add libpag to app/build.gradle (4.0.5.10 should be replaced with the latest release version):

dependencies {
    implementation 'com.tencent.tav:libpag:4.0.5.10'
}

Add the following rule to your proguard rules to avoid the wrong obfuscation.

  -keep class org.libpag.** {*;}
  -keep class androidx.exifinterface.** {*;}

Finally, run gradle sync and then build the project.

Web Integration

Simply copy the following code into an HTML file and open it in your browser:

<canvas class="canvas" id="pag"></canvas>
<script src="https://unpkg.com/libpag@latest/lib/libpag.min.js"></script>
<script>
  window.libpag.PAGInit().then((PAG) => {
    const url = 'https://pag.art/file/like.pag';
    fetch(url)
      .then((response) => response.blob())
      .then(async (blob) => {
        const file = new window.File([blob], url.replace(/(.*\/)*([^.]+)/i, '$2'));
        // Do Something.
      });
  });
</script>

More information：Web SDK Guide

Example

Check out the following projects to learn how to use the APIs of libpag:

Documentation

You can find other docs on pag.art

Development

We recommend using CLion IDE on the macOS platform for development.

Branch Management

The main branch is our active developing branch which contains the latest features and bugfixes.
The branches under release/ are our stable milestone branches which are fully tested. We will periodically cut a release/{version} branch from the main branch. After one release/{version} branch is cut, only high priority fixes are checked into it.

Note: This repository only contains the latest code since PAG 4.0. To use the legacy PAG 3.0 versions, you can download the precompiled libraries from here.

Build Prerequisites

Xcode 11.0+
GCC 7.0+
CMake 3.10.2+
Visual Studio 2019
NDK 19.2.5345600 （Please use this exact version of NDK, other versions may fail.)

Dependency Management

libpag uses depsync tool to manage third-party dependencies.

For macOS platform：

Just simply run the script in the root of libpag project:

./sync_deps.sh

This script will automatically install necessary tools and synchronize all third-party repositories.

For other platforms：

First, make sure you have installed the latest version of node.js (You may need to restart your computer after this step). And then run the following command to install depsync tool:

npm install -g depsync

And then run depsync in the root directory of libpag project.

depsync

Git account and password may be required during synchronizing. Please make sure you have enabled the git-credential-store so that CMakeList.txt can trigger synchronizing automatically next time.

Build

After the synchronization, you can open the project with CLion and build the pag library.

For macOS platform：

There are no extra configurations of CLion required.

For Windows platform：

Please follow the following steps to configure the CLion environment correctly:

Make sure you have installed at least the [Desktop development with C++] and [Universal Windows Platform development] components for VS2019.
Open the File->Setting panel, and go to Build, Execution, Deployment->ToolChains, then set the toolchain of CLion to Visual Studio with amd64 (Recommended) or x86 architecture.

Note: If anything goes wrong during cmake building, please update the cmake commandline tool to the latest version and try again.

Support Us

If you find libpag is helpful, please give us a Star. We sincerely appreciate your support :)

License

libpag is licensed under the Apache Version 2.0 License

Privacy Policy

Please comply with the personal information processing rules of PAG SDK while using libpag SDK

Contribution

If you have any ideas or suggestions to improve libpag, welcome to submit an issue / pull request. Before making a pull request or issue, please make sure to read Contributing Guide.

joegana/libpag