decodeColorFilter static method

ColorFilter? decodeColorFilter(dynamic value, { bool validate = true, })

Decodes a dynamic value into a ColorFilter. The schema this requires depends on the type.

Type: matrix

{
  matrix: "<List<double>"
}

Type: mode

{
  blendMode: "<BlendMode>",
  color: "<Color>"
}

Neither type of linearToSrgbGamma or srgbToLinearGamma requires any additional properties.

Implementation

static ColorFilter? decodeColorFilter(
  dynamic value, {
  bool validate = true,
}) {
  ColorFilter? result;

  if (value is ColorFilter) {
    result = value;
  } else if (value != null) {
    assert(SchemaValidator.validate(
      schemaId: '$_baseSchemaUrl/color_filter',
      value: value,
      validate: validate,
    ));

    final type = value['type']?.toString();

    switch (type) {
      case 'linearToSrgbGamma':
        result = const ColorFilter.linearToSrgbGamma();
        break;

      case 'matrix':
        result = ColorFilter.matrix(
          JsonClass.maybeParseDoubleList(value['matrix'])!,
        );
        break;

      case 'mode':
        result = ColorFilter.mode(
          decodeColor(value['color'])!,
          decodeBlendMode(value['blendMode']) ?? BlendMode.srcIn,
        );
        break;

      case 'srgbToLinearGamma':
        result = const ColorFilter.srgbToLinearGamma();
        break;

      default:
        throw Exception('Unknown ColorFilter type: [$type]');
    }
  }

  return result;
}