blur static method
Implementation
static String blur(int radius, int sigma) {
if (radius < 1) {
throw ArgumentError('Radius must be greater than zero.');
}
if (radius > 150) {
throw ArgumentError('Radius must be lower or equal than 150.');
}
if (sigma < 0) {
throw ArgumentError('Sigma must be greater than zero.');
}
return '$_filterBlur($radius,$sigma)';
}