#version 450

#define MAX_VER  81
#define MAX_PRIM 32

#define BARRIER() \
    memoryBarrierShared(); \
    barrier();

#extension GL_NV_mesh_shader : enable

layout(local_size_x = 32) in;

layout(max_vertices=MAX_VER) out;
layout(max_primitives=MAX_PRIM) out;
layout(triangles) out;

// test use of shared memory in mesh shaders:

writeonly uniform image2D uni_image;
uniform block0 {
    uint    uni_value;
};

shared vec4 mem[10];

void main()
{
    uint iid = gl_LocalInvocationID.x;
    uint gid = gl_WorkGroupID.x;

    for (uint i = 0; i < 10; ++i) {
        mem[i] = vec4(i+uni_value);
    }
    imageStore(uni_image, ivec2(iid), mem[gid]);
    imageStore(uni_image, ivec2(iid), mem[gid+1]);

    BARRIER();
}