0bb6bbda22
There's no need to do so, since these are not stage-out structs being returned, but regular structures being written to a buffer. This also neatly avoids issues writing to composite (e.g. arrayed) per-patch outputs from a tessellation control shader.
43 lines
1.6 KiB
GLSL
43 lines
1.6 KiB
GLSL
#include <metal_stdlib>
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#include <simd/simd.h>
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using namespace metal;
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struct main0_out
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{
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float3 vVertex;
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};
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struct main0_patchOut
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{
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float3 vPatch[2];
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};
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struct main0_in
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{
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float3 vInput [[attribute(0)]];
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};
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kernel void main0(main0_in in [[stage_in]], uint gl_InvocationID [[thread_index_in_threadgroup]], uint gl_PrimitiveID [[threadgroup_position_in_grid]], device main0_out* spvOut [[buffer(28)]], device uint* spvIndirectParams [[buffer(29)]], device main0_patchOut* spvPatchOut [[buffer(27)]], device MTLQuadTessellationFactorsHalf* spvTessLevel [[buffer(26)]], threadgroup main0_in* gl_in [[threadgroup(0)]])
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{
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device main0_out* gl_out = &spvOut[gl_PrimitiveID * 4];
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device main0_patchOut& patchOut = spvPatchOut[gl_PrimitiveID];
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if (gl_InvocationID < spvIndirectParams[0])
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gl_in[gl_InvocationID] = in;
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threadgroup_barrier(mem_flags::mem_threadgroup);
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gl_out[gl_InvocationID].vVertex = gl_in[gl_InvocationID].vInput + gl_in[gl_InvocationID ^ 1].vInput;
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threadgroup_barrier(mem_flags::mem_device);
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if (gl_InvocationID == 0)
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{
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patchOut.vPatch[0] = float3(10.0);
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patchOut.vPatch[1] = float3(20.0);
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spvTessLevel[gl_PrimitiveID].edgeTessellationFactor[0] = half(1.0);
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spvTessLevel[gl_PrimitiveID].edgeTessellationFactor[1] = half(2.0);
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spvTessLevel[gl_PrimitiveID].edgeTessellationFactor[2] = half(3.0);
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spvTessLevel[gl_PrimitiveID].edgeTessellationFactor[3] = half(4.0);
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spvTessLevel[gl_PrimitiveID].insideTessellationFactor[0] = half(1.0);
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spvTessLevel[gl_PrimitiveID].insideTessellationFactor[1] = half(2.0);
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}
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}
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