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add lifecycle listeners

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This commit is contained in:
Nick Fisher
2023-09-01 12:49:54 +08:00
parent b3a305b4b3
commit b739976c24
3 changed files with 106 additions and 48 deletions
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27
ios/Classes/SwiftPolyvoxFilamentPlugin.swift
View File

@@ -187,6 +187,24 @@ public class SwiftPolyvoxFilamentPlugin: NSObject, FlutterPlugin, FlutterTexture
createPixelBuffer(width:Int(args[0]), height:Int(args[1]))
createDisplayLink()
result(self.flutterTextureId)
case "destroyTexture":
if(viewer != nil) {
result(FlutterError(code: "INVALID_ARGUMENTS", message: "Destroy the viewer before destroying the texture", details: nil))
} else {
if(self.flutterTextureId != nil) {
self.registry.unregisterTexture(self.flutterTextureId!)
}
self.flutterTextureId = nil
self.pixelBuffer = nil
}
case "destroyViewer":
if(viewer != nil) {
destroy_swap_chain(viewer)
delete_filament_viewer(viewer)
viewer = nil
}
result(true)
case "resize":
if(viewer == nil) {
print("Error: cannot resize before a viewer has been created")
@@ -203,6 +221,11 @@ public class SwiftPolyvoxFilamentPlugin: NSObject, FlutterPlugin, FlutterTexture
print("Resized to \(args[0])x\(args[1])")
result(self.flutterTextureId);
case "createFilamentViewer":
if(viewer != nil) {
destroy_swap_chain(viewer)
delete_filament_viewer(viewer)
viewer = nil
}
let callback = make_resource_loader(loadResource, freeResource, Unmanaged.passUnretained(self).toOpaque())
let args = call.arguments as! [Any]
let width = args[0] as! Int64
@@ -212,10 +235,6 @@ public class SwiftPolyvoxFilamentPlugin: NSObject, FlutterPlugin, FlutterTexture
create_swap_chain(viewer, pixelBufferTextureId, UInt32(width), UInt32(height))
update_viewport_and_camera_projection(viewer, Int32(args[0] as! Int64), Int32(args[1] as! Int64), 1.0)
result(unsafeBitCast(viewer, to:Int64.self))
case "deleteFilamentViewer":
delete_filament_viewer(viewer)
viewer = nil
result(true)
case "getAssetManager":
let assetManager = get_asset_manager(viewer)
result(unsafeBitCast(assetManager, to:Int64.self))

42
lib/filament_controller.dart
View File

@@ -23,11 +23,8 @@ class FilamentController {
final _textureIdController = StreamController<int?>.broadcast();
Stream<int?> get textureId => _textureIdController.stream;
final _onInitRequestedController = StreamController.broadcast();
Stream get onInitializationRequested => _onInitRequestedController.stream;
final _initialized = Completer();
Future get initialized => _initialized.future;
// final _viewerAvailableController = StreamController<bool>.broadcast();
// Stream<bool> get viewerAvailable => _viewerAvailableController.stream;
late AssetManager _assetManager;
@@ -45,9 +42,24 @@ class FilamentController {
};
}
final _initialSize = Completer<List<int>>();
void setInitialSize(int width, int height) {
_initialSize.complete([width, height]);
}
///
/// The process for initializing the Filament layer is as follows:
/// 1) Create a FilamentController
/// 2) Insert a FilamentWidget into the rendering tree
/// 3) Initially, this widget will only contain an empty Container. After the first frame is rendered, the widget itself will automatically call [setInitialSize] with the width/height from its constraints
/// 4) Call [initialize], which will create a texture/viewer and notify the FilamentWidget that the texture is available
/// 5) The FilamentWidget will replace the empty Container with the Texture widget.
///
Future initialize() async {
_onInitRequestedController.add(true);
return _initialized.future;
var initialSize = await _initialSize.future;
var initialWidth = initialSize[0];
var initialHeight = initialSize[1];
await createViewer(initialWidth, initialHeight);
}
Future setRendering(bool render) async {
@@ -66,6 +78,17 @@ class FilamentController {
_pixelRatio = ratio;
}
Future destroyViewer() async {
await _channel.invokeMethod("destroyViewer");
}
Future destroyTexture() async {
await _channel.invokeMethod("destroyTexture");
_textureId = null;
_assetManager = 0;
_textureIdController.add(null);
}
Future createViewer(int width, int height) async {
size = ui.Size(width * _pixelRatio, height * _pixelRatio);
_textureId =
@@ -90,7 +113,6 @@ class FilamentController {
await _channel.invokeMethod("updateViewportAndCameraProjection",
[size.width.toInt(), size.height.toInt(), 1.0]);
_initialized.complete(true);
_assetManager = await _channel.invokeMethod("getAssetManager");
_textureIdController.add(_textureId);
}
@@ -438,7 +460,7 @@ class FilamentController {
.invokeMethod("setRotation", [_assetManager, asset, rads, x, y, z]);
}
void hide(FilamentEntity asset, String meshName) async {
Future hide(FilamentEntity asset, String meshName) async {
if (await _channel
.invokeMethod("hideMesh", [_assetManager, asset, meshName]) !=
1) {
@@ -446,7 +468,7 @@ class FilamentController {
}
}
void reveal(FilamentEntity asset, String meshName) async {
Future reveal(FilamentEntity asset, String meshName) async {
if (await _channel
.invokeMethod("revealMesh", [_assetManager, asset, meshName]) !=
1) {

85
lib/filament_widget.dart
View File

@@ -4,6 +4,8 @@ import 'dart:math';
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter/scheduler.dart';
import 'dart:async';
import 'filament_controller.dart';
@@ -56,38 +58,58 @@ class FilamentWidget extends StatefulWidget {
}
class _FilamentWidgetState extends State<FilamentWidget> {
StreamSubscription? _initializationListener;
StreamSubscription? _textureIdListener;
int? _textureId;
bool _resizing = false;
bool _hasViewer = false;
late final AppLifecycleListener _listener;
AppLifecycleState? _lastState;
void _handleStateChange(AppLifecycleState state) async {
switch (state) {
case AppLifecycleState.detached:
print("Detached");
await widget.controller.destroyViewer();
await widget.controller.destroyTexture();
break;
case AppLifecycleState.hidden:
print("Hidden");
_textureId = null;
await widget.controller.destroyViewer();
await widget.controller.destroyTexture();
break;
case AppLifecycleState.inactive:
print("Inactive");
break;
case AppLifecycleState.paused:
print("Paused");
break;
case AppLifecycleState.resumed:
print("Resumed");
if (_textureId == null) {
var size = ((context.findRenderObject()) as RenderBox).size;
print("Size after resuming : $size");
await widget.controller
.createViewer(size.width.toInt(), size.height.toInt());
}
break;
}
_lastState = state;
}
@override
void initState() {
_initializationListener =
widget.controller.onInitializationRequested.listen((_) {
WidgetsBinding.instance.addPostFrameCallback((timeStamp) async {
var size = ((context.findRenderObject()) as RenderBox).size;
print(
"Requesting creation of Filament back-end texture/viewer for viewport size $size");
await widget.controller
.createViewer(size.width.toInt(), size.height.toInt());
setState(() {
_hasViewer = true;
});
_listener = AppLifecycleListener(
onStateChange: _handleStateChange,
);
_initializationListener!.cancel();
_initializationListener = null;
WidgetsBinding.instance.addPostFrameCallback((timeStamp) {
var size = ((context.findRenderObject()) as RenderBox).size;
widget.controller.resize(size.width.toInt(), size.height.toInt());
print("RESIZED IN POST FRAME CALLBACK TO $size");
});
setState(() {});
});
WidgetsBinding.instance.addPostFrameCallback((timeStamp) async {
var size = ((context.findRenderObject()) as RenderBox).size;
widget.controller.setInitialSize(size.width.toInt(), size.height.toInt());
});
_textureIdListener = widget.controller.textureId.listen((int? textureId) {
print("Set texture ID to $textureId");
setState(() {
_textureId = textureId;
});
@@ -98,15 +120,14 @@ class _FilamentWidgetState extends State<FilamentWidget> {
@override
void dispose() {
_initializationListener?.cancel();
_textureIdListener?.cancel();
_listener.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
return LayoutBuilder(builder: ((context, constraints) {
print("constraints $constraints");
if (_textureId == null) {
return Container(color: Colors.transparent);
}
@@ -121,10 +142,6 @@ class _FilamentWidgetState extends State<FilamentWidget> {
width: constraints.maxWidth,
child: ResizeObserver(
onResized: (Size oldSize, Size newSize) async {
if (!_hasViewer) {
return;
}
print("RESIZE OBSERVER $newSize");
WidgetsBinding.instance.addPostFrameCallback((_) async {
setState(() {
_resizing = true;
@@ -139,15 +156,15 @@ class _FilamentWidgetState extends State<FilamentWidget> {
});
});
},
child: Platform.isLinux
? _resizing
? Container()
: Transform(
child: _resizing
? Container()
: Platform.isLinux
? Transform(
alignment: Alignment.center,
transform: Matrix4.rotationX(
pi), // TODO - this rotation is due to OpenGL texture coordinate working in a different space from Flutter, can we move this to the C++ side somewhere?
child: texture)
: texture));
: texture));
}));
}
}