[require]
shader model >= 5.0

[render target 0]
format r32 uint
size (640, 480)

[uav 1]
format r32 uint
size (640, 480)

[texture 0]
format r32g32b32a32 uint
size (1, 1)
0 0 0 0

[vertex shader]
float4 main(uint vid : SV_VertexID) : SV_Position
{
    uint pos = vid % 3;
    return float4(pos == 1 ? 3 : -1, pos == 2 ? 3 : -1, 0, 1);
}

[pixel shader]
RWTexture2D<uint4> uav : register(u1);

uint4 main(float4 pos : sv_position) : sv_target
{
    uav[pos.xy] = 0x55555555;
    return 0xaaaaaaaa;
}

% Initialise the UAV and RTV.
[test]
draw triangle list 3
probe all rui(0xaaaaaaaa)
probe uav 1 all rui(0x55555555)

[pixel shader todo]
RasterizerOrderedTexture2D<uint4> tex : register(u1);
Texture2D<uint4> spin : register(t0);

uint4 main(float4 pos : SV_Position, uint id : SV_PrimitiveID) : SV_Target
{
    int2 idx = int2(pos.xy);
    uint val = tex[idx].x;
    uint flag = 1 << (id & 31);
    uint expected = 0x55555555 ^ (flag - 1);
    /* Slow down the shader to increase the likelihood of overlap. */
    int2 bufidx = int2(0, 0);
    for (uint i = 0; i < 64; ++i)
    {
        uint4 extra = spin[bufidx];
        val |= extra;
        bufidx = extra.xy;
    }
    bool ok = val == expected;
    tex[idx] = ok ? val ^ flag : 0;
    return val;
}

[require]
shader model >= 5.0
rov

[test]
todo draw triangle list 93
probe all rui(0x6aaaaaaa)
probe uav 1 all rui(0x2aaaaaaa)