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[flutter] Upgraded to Flutter 3.16.0, fixes #2420
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,120 @@ | ||
| // MIT License | ||
| // | ||
| // Copyright (c) 2021 Yrom Wang | ||
| // | ||
| // Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| // of this software and associated documentation files (the "Software"), to deal | ||
| // in the Software without restriction, including without limitation the rights | ||
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| // copies of the Software, and to permit persons to whom the Software is | ||
| // furnished to do so, subject to the following conditions: | ||
| // | ||
| // The above copyright notice and this permission notice shall be included in all | ||
| // copies or substantial portions of the Software. | ||
| // | ||
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| // SOFTWARE. | ||
| import 'dart:typed_data'; | ||
| import 'dart:ui' as ui; | ||
|
|
||
| import 'package:flutter/foundation.dart'; | ||
| import 'package:flutter/painting.dart'; | ||
| import 'package:crypto/crypto.dart'; | ||
|
|
||
| /// Decodes the given [image] (raw image pixel data) as an image ('dart:ui') | ||
| class RawImageProvider extends ImageProvider<_RawImageKey> { | ||
| final RawImageData image; | ||
| final double? scale; | ||
| final int? targetWidth; | ||
| final int? targetHeight; | ||
| RawImageProvider( | ||
| this.image, { | ||
| this.scale = 1.0, | ||
| this.targetWidth, | ||
| this.targetHeight, | ||
| }); | ||
|
|
||
| @override | ||
| ImageStreamCompleter loadImage(_RawImageKey key, ImageDecoderCallback decode) { | ||
| return MultiFrameImageStreamCompleter( | ||
| codec: _loadAsync(key), | ||
| scale: scale ?? 1.0, | ||
| debugLabel: 'RawImageProvider(${describeIdentity(key)})', | ||
| ); | ||
| } | ||
|
|
||
| @override | ||
| Future<_RawImageKey> obtainKey(ImageConfiguration configuration) { | ||
| return SynchronousFuture(image._obtainKey()); | ||
| } | ||
|
|
||
| /// see [ui.decodeImageFromPixels] | ||
| Future<ui.Codec> _loadAsync(_RawImageKey key) async { | ||
| assert(key == image._obtainKey()); | ||
| // rgba8888 pixels | ||
| var buffer = await ui.ImmutableBuffer.fromUint8List(image.pixels); | ||
|
|
||
| final descriptor = ui.ImageDescriptor.raw( | ||
| buffer, | ||
| width: image.width, | ||
| height: image.height, | ||
| pixelFormat: image.pixelFormat, | ||
| ); | ||
| assert(() { | ||
| debugPrint('ImageDescriptor: ${descriptor.width}x${descriptor.height}'); | ||
| return true; | ||
| }()); | ||
| return descriptor.instantiateCodec( | ||
| targetWidth: targetWidth, targetHeight: targetHeight); | ||
| } | ||
| } | ||
|
|
||
| class _RawImageKey { | ||
| final int w; | ||
| final int h; | ||
| final int format; | ||
| final Digest dataHash; | ||
| _RawImageKey(this.w, this.h, this.format, this.dataHash); | ||
|
|
||
| @override | ||
| bool operator ==(Object other) { | ||
| if (identical(this, other)) return true; | ||
|
|
||
| return other is _RawImageKey && | ||
| other.w == w && | ||
| other.h == h && | ||
| other.format == format && | ||
| other.dataHash == dataHash; | ||
| } | ||
|
|
||
| @override | ||
| int get hashCode { | ||
| return hashValues(w, h, format, dataHash.hashCode); | ||
| } | ||
| } | ||
|
|
||
| /// Raw pixels data of an image | ||
| class RawImageData { | ||
| final Uint8List pixels; | ||
| final int width; | ||
| final int height; | ||
| final ui.PixelFormat pixelFormat; | ||
|
|
||
| RawImageData( | ||
| this.pixels, | ||
| this.width, | ||
| this.height, { | ||
| this.pixelFormat = ui.PixelFormat.rgba8888, | ||
| }); | ||
|
|
||
| _RawImageKey? _key; | ||
| _RawImageKey _obtainKey() { | ||
| return _key ??= | ||
| _RawImageKey(width, height, pixelFormat.index, md5.convert(pixels)); | ||
| } | ||
| } |
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