31 lines
1.1 KiB
Dart
31 lines
1.1 KiB
Dart
// Copyright 2014 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'dart:ui' as ui show Codec;
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import 'package:flutter/foundation.dart';
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import 'package:flutter/painting.dart';
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/// An image provider implementation for testing that is using a [ui.Codec]
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/// that it was given at construction time (typically the job of real image
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/// providers is to resolve some data and instantiate a [ui.Codec] from it).
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class FakeImageProvider extends ImageProvider<FakeImageProvider> {
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const FakeImageProvider(this._codec, {this.scale = 1.0});
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final ui.Codec _codec;
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/// The scale to place in the [ImageInfo] object of the image.
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final double scale;
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@override
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Future<FakeImageProvider> obtainKey(ImageConfiguration configuration) {
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return SynchronousFuture<FakeImageProvider>(this);
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}
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@override
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ImageStreamCompleter loadImage(FakeImageProvider key, ImageDecoderCallback decode) {
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assert(key == this);
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return MultiFrameImageStreamCompleter(codec: SynchronousFuture<ui.Codec>(_codec), scale: scale);
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}
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}
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