#include "Include/PlatformDefines.hlsl"

#pragma kernel CSInstancedRenderingVisibilityKernelLOD0
#pragma kernel CSInstancedRenderingVisibilityKernelLOD1
#pragma kernel CSInstancedRenderingVisibilityKernelLOD2

RWStructuredBuffer<uint4> gpuiInstanceLODData; // lodNo - shadowLodNo - cfLodNo - cfLevel 
AppendStructuredBuffer<uint> gpuiTransformationMatrix_LOD0;
AppendStructuredBuffer<uint> gpuiTransformationMatrix_LOD1;
AppendStructuredBuffer<uint> gpuiTransformationMatrix_LOD2;

uniform uint bufferSize;
uniform uint lodShift;
uniform uint lodAppendIndex;

[numthreads(GPUI_THREADS, 1, 1)]
void CSInstancedRenderingVisibilityKernelLOD0(uint3 id : SV_DispatchThreadID)
{
    if (id.x >= bufferSize)
        return;

    uint lodNo = gpuiInstanceLODData[id.x][lodAppendIndex];
    
    if (lodNo == lodShift)
        gpuiTransformationMatrix_LOD0.Append(id.x);
}

[numthreads(GPUI_THREADS, 1, 1)]
void CSInstancedRenderingVisibilityKernelLOD1(uint3 id : SV_DispatchThreadID)
{
    if (id.x >= bufferSize)
        return;
    
    uint lodNo = gpuiInstanceLODData[id.x][lodAppendIndex];

    if (lodNo == lodShift)
        gpuiTransformationMatrix_LOD0.Append(id.x);
    else if (lodNo == lodShift + 1)
        gpuiTransformationMatrix_LOD1.Append(id.x);
}

[numthreads(GPUI_THREADS, 1, 1)]
void CSInstancedRenderingVisibilityKernelLOD2(uint3 id : SV_DispatchThreadID)
{
    if (id.x >= bufferSize)
        return;

    uint lodNo = gpuiInstanceLODData[id.x][lodAppendIndex];
    
    if (lodNo == lodShift)
        gpuiTransformationMatrix_LOD0.Append(id.x);
    else if (lodNo == lodShift + 1)
        gpuiTransformationMatrix_LOD1.Append(id.x);
    else if (lodNo == lodShift + 2)
        gpuiTransformationMatrix_LOD2.Append(id.x);
}