https://github.com/forthtemple/openworld_gl

https://github.com/forthtemple/openworld_gl

Last synced: 9 days ago
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• Host: GitHub
• URL: https://github.com/forthtemple/openworld_gl
• Owner: forthtemple
• Created: 2024-10-17T06:33:03.000Z (4 months ago)
• Default Branch: main
• Last Pushed: 2024-11-28T07:07:56.000Z (2 months ago)
• Last Synced: 2025-01-29T04:42:22.530Z (10 days ago)
• Language: C
• Size: 2.42 MB
• Stars: 1
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# OPENWORLD GL

This is the flutter_gl package updated to work with the latest version of gradle.  It is used to work with the https://github.com/forthtemple/openworlddart/ package. This version also includes Linux compatibility

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

Support iOS, Android, Web, macOS, Windows, Linux

## OpenGL API

the api is similar to WebGL

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

### import

```

import 'package:openworld_gl/openworld_gl.dart';

```

### Usage

```

int width = 200;

int height = 200;

num dpr = 1.0;

flutterGlPlugin = OpenworldGlPlugin();

Map _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 openworld_gl/openworld_gl/example

flutter run

```

## share opengl context with openworld_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

![screen0](https://user-images.githubusercontent.com/1768228/118112805-15a0b300-b418-11eb-81c0-c693cfca95aa.png)

![screen1](https://user-images.githubusercontent.com/1768228/118112813-176a7680-b418-11eb-8ff9-877b941048e1.png)

## Issues

File any issues, bugs, or feature requests.

## Contributing

Pull request please!