The two structures we will be sorting are defined by the following C code:

$//$A struct with $28-$bit values, one unsigned and one signed

typedef struct $\{$

uint$8\_$t x;

int$8\_$t y;

$\}$tuple;

$//$A struct with $4$ unsigned $8-$bit values representing an additive color

typedef struct $\{$

uint$8\_$t r;

uint$8\_$t g;

uint$8\_$t b;

uint$8\_$t a;

$\}$pixe