ImageProvider for raw RGBA pixels

app/lib/pixel_image_provider.dart

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+import 'dart:typed_data';
+import 'dart:ui';
+
+import 'package:flutter/foundation.dart';
+import 'package:flutter/rendering.dart';
+
+/// ImageProvider for raw RGBA pixels
+class PixelImage extends ImageProvider<PixelImage> {
+  PixelImage(
+    this.rgba,
+    this.width,
+    this.height, {
+    this.scale = 1.0,
+  });
+
+  @override
+  obtainKey(ImageConfiguration configuration) =>
+      SynchronousFuture<PixelImage>(this);
+
+  @override
+  load(PixelImage key, DecoderCallback decode) =>
+      OneFrameImageStreamCompleter(_createImageInfo());
+
+  Future<ImageInfo> _createImageInfo() async {
+    final codec = await ImageDescriptor.raw(
+      await ImmutableBuffer.fromUint8List(rgba),
+      width: width,
+      height: height,
+      pixelFormat: PixelFormat.rgba8888,
+    ).instantiateCodec();
+    final frame = await codec.getNextFrame();
+    return ImageInfo(image: frame.image, scale: scale);
+  }
+
+  final Uint8List rgba;
+  final int width;
+  final int height;
+
+  /// The scale to place in the [ImageInfo] object of the image.
+  final double scale;
+}