// Unity built-in shader source. Copyright (c) 2016 Unity Technologies. MIT license (see license.txt)

#pragma kernel ReplaceTranslationTable

static const uint TGSize = 256;

RWByteAddressBuffer _output_buf : register(u0);
ByteAddressBuffer _input_map : register(t0);

cbuffer cbReplacementData
{
    uint numReplacements;
    uint pad0;
    uint pad1;
    uint pad2;
};

[numthreads(TGSize, 1, 1)]
void ReplaceTranslationTable(in uint3 GroupID : SV_GroupID, in uint3 GroupThreadID : SV_GroupThreadID)
{
    const uint pos = GroupID.x * TGSize + GroupThreadID.x;
    if (pos < numReplacements)
    {
        uint2 data = _input_map.Load2(pos * 2 * 4); //*2 ints per tuple, *4 bytes per int
        _output_buf.Store(data.x * 4, data.y);  //*4 bytes per int
    }
}