reference/shaders-msl/tesc/struct-output.multi-patch.tesc

#include <metal_stdlib>
#include <simd/simd.h>

using namespace metal;

struct te_data
{
    float a;
    float b;
    uint c;
};

struct main0_out
{
    float in_te_attr;
    te_data in_te_data0;
    te_data in_te_data1;
};

struct main0_in
{
    float3 in_tc_attr;
    ushort2 m_107;
};

kernel void main0(uint3 gl_GlobalInvocationID [[thread_position_in_grid]], device main0_out* spvOut [[buffer(28)]], constant uint* spvIndirectParams [[buffer(29)]], device MTLQuadTessellationFactorsHalf* spvTessLevel [[buffer(26)]], device main0_in* spvIn [[buffer(22)]])
{
    device main0_out* gl_out = &spvOut[gl_GlobalInvocationID.x - gl_GlobalInvocationID.x % 3];
    device main0_in* gl_in = &spvIn[min(gl_GlobalInvocationID.x / 3, spvIndirectParams[1] - 1) * spvIndirectParams[0]];
    uint gl_InvocationID = gl_GlobalInvocationID.x % 3;
    uint gl_PrimitiveID = min(gl_GlobalInvocationID.x / 3, spvIndirectParams[1] - 1);
    te_data d = te_data{ float(gl_InvocationID), float(gl_InvocationID + 1), uint(gl_InvocationID) };
    gl_out[gl_InvocationID].in_te_data0 = d;
    threadgroup_barrier(mem_flags::mem_device | mem_flags::mem_threadgroup);
    te_data e = gl_out[(gl_InvocationID + 1) % 3].in_te_data0;
    gl_out[gl_InvocationID].in_te_data1 = te_data{ d.a + e.a, d.b + e.b, d.c + e.c };
    gl_out[gl_InvocationID].in_te_attr = gl_in[gl_InvocationID].in_tc_attr.x;
    spvTessLevel[gl_PrimitiveID].insideTessellationFactor[0] = half(1.0);
    spvTessLevel[gl_PrimitiveID].insideTessellationFactor[1] = half(1.0);
    spvTessLevel[gl_PrimitiveID].edgeTessellationFactor[0] = half(1.0);
    spvTessLevel[gl_PrimitiveID].edgeTessellationFactor[1] = half(1.0);
    spvTessLevel[gl_PrimitiveID].edgeTessellationFactor[2] = half(1.0);
    spvTessLevel[gl_PrimitiveID].edgeTessellationFactor[3] = half(1.0);
}