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Add test for image readback (flutter/engine#37401)

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This commit is contained in:
Harry Terkelsen
2022-11-07 17:05:37 -08:00
committed by GitHub
parent 2dec5de8cf
commit 01d17d6af9
1 changed files with 45 additions and 0 deletions
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45
engine/src/flutter/lib/web_ui/test/canvaskit/image_golden_test.dart
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@@ -635,6 +635,51 @@ void _testForImageCodecs({required bool useBrowserImageDecoder}) {
codec.dispose();
});
test('decoded image can be read back from picture', () async {
final DomResponse imageResponse = await httpFetch('/test_images/mandrill_128.png');
final Uint8List imageData = (await imageResponse.arrayBuffer() as ByteBuffer).asUint8List();
final ui.Codec codec = await skiaInstantiateImageCodec(imageData);
final ui.FrameInfo frame = await codec.getNextFrame();
final CkImage image = frame.image as CkImage;
final CkImage snapshot;
{
final LayerSceneBuilder sb = LayerSceneBuilder();
sb.pushOffset(10, 10);
final CkPictureRecorder recorder = CkPictureRecorder();
final CkCanvas canvas = recorder.beginRecording(ui.Rect.largest);
canvas.drawRect(
const ui.Rect.fromLTRB(5, 5, 20, 20),
CkPaint(),
);
canvas.drawImage(image, ui.Offset.zero, CkPaint());
canvas.drawRect(
const ui.Rect.fromLTRB(90, 90, 105, 105),
CkPaint(),
);
sb.addPicture(ui.Offset.zero, recorder.endRecording());
sb.pop();
snapshot = await sb.build().toImage(150, 150) as CkImage;
}
{
final LayerSceneBuilder sb = LayerSceneBuilder();
final CkPictureRecorder recorder = CkPictureRecorder();
final CkCanvas canvas = recorder.beginRecording(ui.Rect.largest);
canvas.drawImage(snapshot, ui.Offset.zero, CkPaint());
sb.addPicture(ui.Offset.zero, recorder.endRecording());
CanvasKitRenderer.instance.rasterizer.draw(sb.build().layerTree);
await matchGoldenFile(
'canvaskit_read_back_decoded_image_$mode.png',
region: const ui.Rect.fromLTRB(0, 0, 150, 150),
);
}
image.dispose();
codec.dispose();
});
test('can detect JPEG from just magic number', () async {
expect(
detectContentType(