fromHexString static method
Convert the color as a string in the format '#FF0F00', '#FFFF0F00', '#FF0'
or '#FFF0' (with or without a leading '#', case insensitive) to the
corresponding color value and store it in result
. The first group is
treated as the alpha channel if a value
with four groups is passed.
Implementation
static void fromHexString(String value, Vector4 result) {
final fullMatch = _hexStringFullRegex.matchAsPrefix(value);
if (fullMatch != null) {
if (fullMatch[4] == null) {
final r = int.parse(fullMatch[1]!, radix: 16);
final g = int.parse(fullMatch[2]!, radix: 16);
final b = int.parse(fullMatch[3]!, radix: 16);
fromRgba(r, g, b, 255, result);
return;
} else {
final a = int.parse(fullMatch[1]!, radix: 16);
final r = int.parse(fullMatch[2]!, radix: 16);
final g = int.parse(fullMatch[3]!, radix: 16);
final b = int.parse(fullMatch[4]!, radix: 16);
fromRgba(r, g, b, a, result);
return;
}
}
final smallMatch = _hexStringSmallRegex.matchAsPrefix(value);
if (smallMatch != null) {
if (smallMatch[4] == null) {
final r = int.parse(smallMatch[1]! + smallMatch[1]!, radix: 16);
final g = int.parse(smallMatch[2]! + smallMatch[2]!, radix: 16);
final b = int.parse(smallMatch[3]! + smallMatch[3]!, radix: 16);
fromRgba(r, g, b, 255, result);
return;
} else {
final a = int.parse(smallMatch[1]! + smallMatch[1]!, radix: 16);
final r = int.parse(smallMatch[2]! + smallMatch[2]!, radix: 16);
final g = int.parse(smallMatch[3]! + smallMatch[3]!, radix: 16);
final b = int.parse(smallMatch[4]! + smallMatch[4]!, radix: 16);
fromRgba(r, g, b, a, result);
return;
}
}
throw FormatException('Could not parse hex color $value');
}