ZFX + Developia

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warning X3557: Loop only executes for 0 iteration(s), forcing loop to unroll
error X3511: Unable to unroll loop, loop does not appear to terminate in a timely manner (1024 iterations)
error X3511: Forced to unroll loop, but unrolling failed.

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const int2 boxSize = (1, 1);

float4 
psBoxBlur(const vsInOut psIn) : COLOR
{
    int x = -boxSize.x;
    int y = -boxSize.y;
    float invTexSizeX = 1 / displayRes.x;
    float invTexSizeY = 1 / displayRes.y;
    
    float4 sum = 0;
    for(; x <= boxSize.x; x++)
    {
        for(; y <= boxSize.y; y++)
        {
            float2 boxUv = psIn.uv0 + float2(x * invTexSizeX, y * invTexSizeY);
            sum += tex2D(sourceSampler, boxUv);
        }
    }
    sum /= (boxSize.x * 2 + 1) * (boxSize.y * 2 + 1);
    return sum;
} 

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......
for(x = -boxSize.x; x <= boxSize.x; x++)
......

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static const int2 boxSize = (1, 1);