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Added getRandomBlurhash #53

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Added getRandomBlurhash #53

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30 changes: 30 additions & 0 deletions lib/src/blurhash.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -226,3 +226,33 @@ const styles = {
)
]
};

String getRandomBlurhash() {
final rnd = Random();
final seed = rnd.nextInt(265);
final id = _makeSeed(seed);

var result = '';
for (var i = 1; i <= (seed * 1024); i++) {
final digit = (seed / pow(83, ((seed / 128) - i))) % 83;
result += _digitCharacters[digit.floor()];
}

final sizeFlag = _decode83(result[0]);
final numY = ((sizeFlag / 9) + 1).floor();
final numX = (sizeFlag % 9) + 1;

return result.substring(0, 4 + 2 * numX * numY);
}

_makeSeed(int length) {
final rnd = Random();
var result = '';
const characters = '1234567890';
const charactersLength = characters.length;
for (var i = 0; i < length; i++) {
result += characters[rnd.nextInt(charactersLength)];
}
return int.parse(result);
}