dispersia / flutter_gl

cross-platform call OpenGL API by Dart through dart:ffi. Provides OpenGL with Texture Widget on Flutter.

Flutter GL

cross-platform call OpenGL API by Dart through dart:ffi. Provides OpenGL with Texture Widget on Flutter.

Support iOS, Android, Web, macOS, Windows

Linux TODO

Used by three_dart

OpenGL API

the api is similar to WebGL

only support draw to FBO. then share the FBO texture to Native side.

import

import 'package:flutter_gl/flutter_gl.dart';

Usage

int width = 200;
int height = 200;
num dpr = 1.0;

flutterGlPlugin = FlutterGlPlugin();

Map<String, dynamic> _options = {
    "width": width, 
    "height": height, 
    "dpr": dpr,
    "antialias": true,
    "alpha": false
};    
await flutterGlPlugin.initialize(options: _options);

// on web this need called after web canvas dom was added to document
await flutterGlPlugin.prepareContext();

// you can get gl by
gl = flutterGlPlugin.gl;

// then you can call OpenGL ES API by gl like
gl.clearColor(0.0, 0.0, 0.0, 1.0);
gl.clear(gl.COLOR_BUFFER_BIT);

// use this method to notify Flutter update Texture Widget
// sourceTextue is a texture which bind to FBO framebuffer
flutterGlPlugin.updateTexture(sourceTexture);

why use NativeArray replace Dart List

Dart List convert to ffi pointer need memeory copy.

Run Examples

Clone or download this repo

cd flutter_gl/flutter_gl/example

flutter run

share opengl context with flutter_gl

Android

when init the plugin, save share opengl context with ThreeEgl,

ThreeEgl.setContext("shareContext", shareEglEnv.eglContext);

so you can get it use ThreeEgl lib, then create yourself opengl context share with "shareContext"

shareContext = ThreeEgl.getContext("shareContext");

iOS

for iOS the key is 3 ...

eAGLShareContext = ThreeEgl.getContext(key: 3);

Web

no need ? just webgl

Windows

not support get share context now

Android

check the example project copy the example/android/app/libs/aars/threeegl.aar to your app android project same path

change minSdkVersion 24

Screenshot

Issues

File any issues, bugs, or feature requests.

Contributing

Pull request please!