decodeDecorationImage static method

DecorationImage? decodeDecorationImage(dynamic value, { bool validate = true, })

Decodes the given value to an DecorationImage. This expects the given value to follow the structure below:

{
  "alignment": <Alignment>,
  "centerSlice": <Rect>,
  "filterQuality": <FilterQuality>,
  "fit": <BoxFit>,
  "image": <ImageProvider>,
  "invertColors": <bool>,
  "isAntiAlias": <bool>,
  "matchTextDirection": <bool>,
  "opacity": <double>,
  "repeat": <ImageRepeat>,
  "scale": <double>
}

See also:

• decodeAlignment
• decodeBoxFit
• decodeFilterQuality
• decodeImageProvider
• decodeImageRepeat
• decodeRect

Implementation

static DecorationImage? decodeDecorationImage(
  dynamic value, {
  bool validate = true,
}) {
  DecorationImage? result;

  if (value is DecorationImage) {
    result = value;
  } else if (value != null) {
    assert(SchemaValidator.validate(
      schemaId: '$_baseSchemaUrl/decoration_image',
      value: value,
      validate: validate,
    ));
    result = DecorationImage(
      alignment: decodeAlignment(
            value['alignment'],
            validate: false,
          ) ??
          Alignment.center,
      centerSlice: decodeRect(
        value['centerSlice'],
        validate: false,
      ),
      // @unencodable
      // colorFilter
      // @unencodable
      // onError
      fit: decodeBoxFit(
        value['fit'],
        validate: false,
      ),
      filterQuality: decodeFilterQuality(
            value['filterQuality'],
            validate: false,
          ) ??
          FilterQuality.low,
      image: decodeImageProvider(
        value['image'],
        validate: false,
      )!,
      invertColors: JsonClass.parseBool(value['invertColors']),
      isAntiAlias: JsonClass.parseBool(value['isAntiAlias']),
      matchTextDirection: JsonClass.parseBool(value['matchTextDirection']),
      opacity: JsonClass.parseDouble(value['opacity']) ?? 1.0,
      repeat: decodeImageRepeat(
            value['repeat'],
            validate: false,
          ) ??
          ImageRepeat.noRepeat,
      scale: JsonClass.parseDouble(value['scale'], 1.0)!,
    );
  }

  return result;
}