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17 lines
550 B
17 lines
550 B
4 years ago
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import 'dart:typed_data';
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import 'dart:ui';
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import 'package:flutter/material.dart';
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Color getColorByPixel(ByteData byteData, Size size, Offset pixel) {
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//rawRgba
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assert(byteData.lengthInBytes == size.width * size.height * 4);
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assert(pixel.dx < size.width && pixel.dy < size.height);
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int index = ((pixel.dy * size.width + pixel.dx) * 4).toInt();
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int r = byteData.getUint8(index);
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int g = byteData.getUint8(index + 1);
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int b = byteData.getUint8(index + 2);
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int a = byteData.getUint8(index + 3);
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return Color.fromARGB(a, r, g, b);
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}
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