std::compression::qoi
OpDiff
bitstruct OpDiff : char
{
char tag : 6..7;
char diff_red : 4..5;
char diff_green : 2..3;
char diff_blue : 0..1;
}bitstruct OpDiff : char
{
char tag : 6..7;
char diff_red : 4..5;
char diff_green : 2..3;
char diff_blue : 0..1;
}