adjustContrast method
Implementation
void adjustContrast(num value) {
final v = min(max(value, -1), 1) + 1;
final o = 128 * (1 - v);
_concat([v, 0, 0, 0, 0, v, 0, 0, 0, 0, v, 0, 0, 0, 0, 1], [o, o, o, 0]);
}
void adjustContrast(num value) {
final v = min(max(value, -1), 1) + 1;
final o = 128 * (1 - v);
_concat([v, 0, 0, 0, 0, v, 0, 0, 0, 0, v, 0, 0, 0, 0, 1], [o, o, o, 0]);
}