flutter_opengl 0.0.2

Flutter OpenGL plugin

example/lib/main.dart

import 'package:flutter/material.dart';

import 'package:opengl/opengl.dart';

void main() => runApp(MyApp());

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => new _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String notes;
  final controller = Opengl();
  final _width = 300.0;
  final _height = 300.0;

  @override
  initState() {
    super.initState();

    notes="";
    initializeNDKController();
  }

  @override
  void dispose() {
    stopNDKController();
    super.dispose();
  }


  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Flutter OpenGL test'),
        ),
        body: Center(
          child: Column(
            children: <Widget>[
              SizedBox(height: 8.0,),
              Text("https://github.com/alnitak/flutter_opengl"),
              SizedBox(height: 6.0,),
              Container(
                width: _width,
                height: _height,
                child: controller.isInitialized
                    ? Texture(textureId: controller.textureId)
                    : Container(),
              ),
              _buildControls(),
            ],
          ),
        ),
      ),
    );
  }

  Widget _buildControls() {
    return
        Column(
          children: <Widget>[
            Padding(
              padding: const EdgeInsets.only(top: 16.0),
              child: Text(notes),
            ),
            Row(
              mainAxisAlignment: MainAxisAlignment.center,
              children: <Widget>[
                RaisedButton(
                  child: Text("stop"),
                  color: Colors.red,
                  textColor: Colors.white,
                  onPressed: () {
                    stopNDKController();
                  },
                ),
                SizedBox(width: 20),
                RaisedButton(
                  child: Text("re-create"),
                  color: Colors.green,
                  textColor: Colors.white,
                  onPressed: () {
                    initializeNDKController();
                  },
                ),
              ],
            ),
            Row(
              mainAxisAlignment: MainAxisAlignment.center,
              children: <Widget>[
                RaisedButton(
                  child: Text("OpenGL ES 1\nfunc 1"),
                  onPressed: () {
                    setNDKRenderFuncController(0);
                    notes = "";
                    setState(() {});
                  },
                ),
                SizedBox(width: 6),
                RaisedButton(
                  child: Text("OpenGL ES 2\nshader 1"),
                  onPressed: () {
                    setNDKRenderFuncController(1);
                    notes = "COMPUTATIONAL INTENSIVE\nhttps://www.shadertoy.com/view/3l23Rh";
                    setState(() {});
                  },
                ),
              ],
            ),
            Row(
              mainAxisAlignment: MainAxisAlignment.center,
              children: <Widget>[
                RaisedButton(
                  child: Text("OpenGL ES 2\ntexture shader 2"),
                  onPressed: () {
                    setNDKRenderFuncController(2);
                    notes = "https://www.shadertoy.com/view/llj3Dz";
                    setState(() {});
                  },
                ),
                SizedBox(width: 6),
                RaisedButton(
                  child: Text("OpenGL ES 2\nshader 3"),
                  onPressed: () {
                    setNDKRenderFuncController(3);
                    notes = "https://www.shadertoy.com/view/ttlGDf";
                    setState(() {});
                  },
                ),
              ],
            ),
          ],
        );
  }


  initializeNDKController() async {
    await controller.initializeNDK(0, _width, _height);
    setState(() {});
  }

  stopNDKController() async {
    await controller.stopNDK();
    setState(() {});
  }

  setNDKRenderFuncController(int func) async {
    await controller.stopNDK();
    await controller.initializeNDK(func, _width, _height);
    setState(() {});
  }
}