resources/sksl/shared/UniformMatrixResize.sksl

uniform float3x3 testMatrix3x3;
uniform half4 colorGreen, colorRed;

noinline float2x2 resizeMatrix() {
    return float2x2(testMatrix3x3);
}

half4 main(float2 coords) {
    return resizeMatrix() == float2x2(1, 2, 4, 5) ? colorGreen : colorRed;
}