#version 450

/* built in:
in uvec3 gl_NumWorkGroups;
in uvec3 gl_WorkGroupID;
in uvec3 gl_LocalInvocationID;
in uvec3 gl_GlobalInvocationID;
in uint  gl_LocalInvocationIndex;
*/
layout(local_size_x_id = 0, local_size_y = 1, local_size_z = 1) in;
layout(constant_id = 1) const uint SAMPLE_MULTIPLIER = 1;

// Push constant
layout(push_constant) uniform PushStruct
{
    uint size;
}
p;

layout(binding = 0) buffer inoutBufer { uint data[]; };
layout(binding = 1) buffer offsetBufer { uint offsets[]; };

void main()
{
    uint tid      = gl_LocalInvocationID.x;
    uint group_id = gl_WorkGroupID.x;

    uint gid0 = group_id * 256 + 2 * tid;
    uint gid1 = group_id * 256 + 2 * tid + 1;

    uint offset = offsets[group_id - 1];
    data[gid0] += offset;
    data[gid1] += offset;
}