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Complete Picture.toImage futures with an exception if the image is null (flutter/engine#25058)

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This commit is contained in:
Jason Simmons 2021-03-18 10:56:01 -07:00 committed by GitHub
parent 17e51505e7
commit cda084e0a3
1 changed files with 7 additions and 3 deletions
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10
engine/src/flutter/lib/ui/painting.dart
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@ -4879,13 +4879,17 @@ class Picture extends NativeFieldWrapperClass2 {
if (width <= 0 || height <= 0)
throw Exception('Invalid image dimensions.');
return _futurize(
(_Callback<Image> callback) => _toImage(width, height, (_Image image) {
callback(Image._(image));
(_Callback<Image?> callback) => _toImage(width, height, (_Image? image) {
if (image == null) {
callback(null);
} else {
callback(Image._(image));
}
}),
);
}
String? _toImage(int width, int height, _Callback<_Image> callback) native 'Picture_toImage';
String? _toImage(int width, int height, _Callback<_Image?> callback) native 'Picture_toImage';
/// Release the resources used by this object. The object is no longer usable
/// after this method is called.