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GLSL: Emit inline invariant position for mesh shaders.
Work around missing feature from GLSL. Normally we can emit a global invariant gl_Position; and call it a day, but it does not work for mesh shaders it seems. Declaring invariance inside an explicit IO block works fine on the other hand ...
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49 changes: 49 additions & 0 deletions
49
reference/shaders-no-opt/asm/mesh/invariant-position-dx-style.vk.nocompat.spv14.asm.mesh.vk
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#version 450 | ||
#extension GL_EXT_mesh_shader : require | ||
layout(local_size_x = 2, local_size_y = 3, local_size_z = 4) in; | ||
layout(max_vertices = 24, max_primitives = 8, triangles) out; | ||
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out gl_MeshPerVertexEXT | ||
{ | ||
invariant vec4 gl_Position; | ||
} gl_MeshVerticesEXT[]; | ||
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struct _12 | ||
{ | ||
float _m0; | ||
}; | ||
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layout(location = 1) out vec4 B[24]; | ||
layout(location = 3) perprimitiveEXT out vec4 C[8]; | ||
shared float _32[64]; | ||
taskPayloadSharedEXT _12 _38; | ||
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void main() | ||
{ | ||
_32[gl_LocalInvocationIndex] = float(gl_LocalInvocationIndex); | ||
barrier(); | ||
SetMeshOutputsEXT(24u, 8u); | ||
gl_MeshVerticesEXT[gl_LocalInvocationIndex].gl_Position.x = _32[gl_LocalInvocationIndex]; | ||
gl_MeshVerticesEXT[gl_LocalInvocationIndex].gl_Position.y = _32[gl_LocalInvocationIndex]; | ||
gl_MeshVerticesEXT[gl_LocalInvocationIndex].gl_Position.z = _32[gl_LocalInvocationIndex]; | ||
gl_MeshVerticesEXT[gl_LocalInvocationIndex].gl_Position.w = _32[gl_LocalInvocationIndex]; | ||
float _59 = _38._m0 + _32[gl_LocalInvocationIndex ^ 1u]; | ||
B[gl_LocalInvocationIndex].x = _59; | ||
B[gl_LocalInvocationIndex].y = _59; | ||
B[gl_LocalInvocationIndex].z = _59; | ||
B[gl_LocalInvocationIndex].w = _59; | ||
if (gl_LocalInvocationIndex < 8u) | ||
{ | ||
uint _65 = gl_LocalInvocationIndex * 3u; | ||
gl_PrimitiveTriangleIndicesEXT[gl_LocalInvocationIndex] = uvec3(_65, _65 + 1u, _65 + 2u); | ||
gl_MeshPrimitivesEXT[gl_LocalInvocationIndex].gl_CullPrimitiveEXT = (gl_LocalInvocationIndex & 1u) != 0u; | ||
gl_MeshPrimitivesEXT[gl_LocalInvocationIndex].gl_PrimitiveID = int(gl_LocalInvocationIndex); | ||
gl_MeshPrimitivesEXT[gl_LocalInvocationIndex].gl_Layer = int(gl_LocalInvocationIndex); | ||
uint _78 = gl_LocalInvocationIndex ^ 2u; | ||
C[gl_LocalInvocationIndex].x = _32[_78]; | ||
C[gl_LocalInvocationIndex].y = _32[_78]; | ||
C[gl_LocalInvocationIndex].z = _32[_78]; | ||
C[gl_LocalInvocationIndex].w = _32[_78]; | ||
} | ||
} | ||
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19 changes: 19 additions & 0 deletions
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reference/shaders-no-opt/mesh/invariant-position-mesh.spv14.nocompat.vk.mesh.vk
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#version 450 | ||
#extension GL_EXT_mesh_shader : require | ||
layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in; | ||
layout(max_vertices = 3, max_primitives = 1, triangles) out; | ||
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out gl_MeshPerVertexEXT | ||
{ | ||
invariant vec4 gl_Position; | ||
} gl_MeshVerticesEXT[]; | ||
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void main() | ||
{ | ||
SetMeshOutputsEXT(3u, 1u); | ||
gl_MeshVerticesEXT[0].gl_Position = vec4(1.0); | ||
gl_MeshVerticesEXT[1].gl_Position = vec4(1.0); | ||
gl_MeshVerticesEXT[2].gl_Position = vec4(1.0); | ||
gl_PrimitiveTriangleIndicesEXT[0] = uvec3(0u, 1u, 2u); | ||
} | ||
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151 changes: 151 additions & 0 deletions
151
shaders-no-opt/asm/mesh/invariant-position-dx-style.vk.nocompat.spv14.asm.mesh
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; SPIR-V | ||
; Version: 1.4 | ||
; Generator: Unknown(30017); 21022 | ||
; Bound: 89 | ||
; Schema: 0 | ||
OpCapability Shader | ||
OpCapability Geometry | ||
OpCapability ShaderViewportIndexLayerEXT | ||
OpCapability MeshShadingEXT | ||
OpExtension "SPV_EXT_mesh_shader" | ||
OpExtension "SPV_EXT_shader_viewport_index_layer" | ||
OpMemoryModel Logical GLSL450 | ||
OpEntryPoint MeshEXT %main "main" %SV_Position %B %SV_CullPrimitive %SV_RenderTargetArrayIndex %SV_PrimitiveID %C %indices %32 %gl_LocalInvocationIndex %38 | ||
OpExecutionMode %main OutputVertices 24 | ||
OpExecutionMode %main OutputPrimitivesNV 8 | ||
OpExecutionMode %main OutputTrianglesNV | ||
OpExecutionMode %main LocalSize 2 3 4 | ||
OpName %main "main" | ||
OpName %SV_Position "SV_Position" | ||
OpName %B "B" | ||
OpName %SV_CullPrimitive "SV_CullPrimitive" | ||
OpName %SV_RenderTargetArrayIndex "SV_RenderTargetArrayIndex" | ||
OpName %SV_PrimitiveID "SV_PrimitiveID" | ||
OpName %C "C" | ||
OpName %indices "indices" | ||
OpName %_ "" | ||
OpDecorate %SV_Position BuiltIn Position | ||
OpDecorate %SV_Position Invariant | ||
OpDecorate %B Location 1 | ||
OpDecorate %SV_CullPrimitive BuiltIn CullPrimitiveEXT | ||
OpDecorate %SV_CullPrimitive PerPrimitiveNV | ||
OpDecorate %SV_RenderTargetArrayIndex BuiltIn Layer | ||
OpDecorate %SV_RenderTargetArrayIndex PerPrimitiveNV | ||
OpDecorate %SV_PrimitiveID BuiltIn PrimitiveId | ||
OpDecorate %SV_PrimitiveID PerPrimitiveNV | ||
OpDecorate %C Location 3 | ||
OpDecorate %C PerPrimitiveNV | ||
OpDecorate %indices BuiltIn PrimitiveTriangleIndicesEXT | ||
OpDecorate %gl_LocalInvocationIndex BuiltIn LocalInvocationIndex | ||
%void = OpTypeVoid | ||
%2 = OpTypeFunction %void | ||
%float = OpTypeFloat 32 | ||
%v4float = OpTypeVector %float 4 | ||
%uint = OpTypeInt 32 0 | ||
%uint_24 = OpConstant %uint 24 | ||
%_arr_v4float_uint_24 = OpTypeArray %v4float %uint_24 | ||
%_ptr_Output__arr_v4float_uint_24 = OpTypePointer Output %_arr_v4float_uint_24 | ||
%SV_Position = OpVariable %_ptr_Output__arr_v4float_uint_24 Output | ||
%B = OpVariable %_ptr_Output__arr_v4float_uint_24 Output | ||
%bool = OpTypeBool | ||
%uint_8 = OpConstant %uint 8 | ||
%_arr_bool_uint_8 = OpTypeArray %bool %uint_8 | ||
%_ptr_Output__arr_bool_uint_8 = OpTypePointer Output %_arr_bool_uint_8 | ||
%SV_CullPrimitive = OpVariable %_ptr_Output__arr_bool_uint_8 Output | ||
%_arr_uint_uint_8 = OpTypeArray %uint %uint_8 | ||
%_ptr_Output__arr_uint_uint_8 = OpTypePointer Output %_arr_uint_uint_8 | ||
%SV_RenderTargetArrayIndex = OpVariable %_ptr_Output__arr_uint_uint_8 Output | ||
%SV_PrimitiveID = OpVariable %_ptr_Output__arr_uint_uint_8 Output | ||
%_arr_v4float_uint_8 = OpTypeArray %v4float %uint_8 | ||
%_ptr_Output__arr_v4float_uint_8 = OpTypePointer Output %_arr_v4float_uint_8 | ||
%C = OpVariable %_ptr_Output__arr_v4float_uint_8 Output | ||
%v3uint = OpTypeVector %uint 3 | ||
%_arr_v3uint_uint_8 = OpTypeArray %v3uint %uint_8 | ||
%_ptr_Output__arr_v3uint_uint_8 = OpTypePointer Output %_arr_v3uint_uint_8 | ||
%indices = OpVariable %_ptr_Output__arr_v3uint_uint_8 Output | ||
%uint_64 = OpConstant %uint 64 | ||
%_arr_float_uint_64 = OpTypeArray %float %uint_64 | ||
%_ptr_Workgroup__arr_float_uint_64 = OpTypePointer Workgroup %_arr_float_uint_64 | ||
%32 = OpVariable %_ptr_Workgroup__arr_float_uint_64 Workgroup | ||
%_ptr_Input_uint = OpTypePointer Input %uint | ||
%gl_LocalInvocationIndex = OpVariable %_ptr_Input_uint Input | ||
%_ = OpTypeStruct %float | ||
%_ptr_TaskPayloadWorkgroupEXT__ = OpTypePointer TaskPayloadWorkgroupEXT %_ | ||
%38 = OpVariable %_ptr_TaskPayloadWorkgroupEXT__ TaskPayloadWorkgroupEXT | ||
%_ptr_Workgroup_float = OpTypePointer Workgroup %float | ||
%uint_2 = OpConstant %uint 2 | ||
%uint_264 = OpConstant %uint 264 | ||
%_ptr_Output_float = OpTypePointer Output %float | ||
%uint_0 = OpConstant %uint 0 | ||
%uint_1 = OpConstant %uint 1 | ||
%uint_3 = OpConstant %uint 3 | ||
%_ptr_TaskPayloadWorkgroupEXT_float = OpTypePointer TaskPayloadWorkgroupEXT %float | ||
%_ptr_Output_v3uint = OpTypePointer Output %v3uint | ||
%_ptr_Output_bool = OpTypePointer Output %bool | ||
%_ptr_Output_uint = OpTypePointer Output %uint | ||
%main = OpFunction %void None %2 | ||
%4 = OpLabel | ||
OpBranch %85 | ||
%85 = OpLabel | ||
%35 = OpLoad %uint %gl_LocalInvocationIndex | ||
%39 = OpConvertUToF %float %35 | ||
%41 = OpAccessChain %_ptr_Workgroup_float %32 %35 | ||
OpStore %41 %39 | ||
OpControlBarrier %uint_2 %uint_2 %uint_264 | ||
OpSetMeshOutputsEXT %uint_24 %uint_8 | ||
%44 = OpLoad %float %41 | ||
%46 = OpAccessChain %_ptr_Output_float %SV_Position %35 %uint_0 | ||
OpStore %46 %44 | ||
%48 = OpAccessChain %_ptr_Output_float %SV_Position %35 %uint_1 | ||
OpStore %48 %44 | ||
%50 = OpAccessChain %_ptr_Output_float %SV_Position %35 %uint_2 | ||
OpStore %50 %44 | ||
%51 = OpAccessChain %_ptr_Output_float %SV_Position %35 %uint_3 | ||
OpStore %51 %44 | ||
%53 = OpBitwiseXor %uint %35 %uint_1 | ||
%54 = OpAccessChain %_ptr_Workgroup_float %32 %53 | ||
%55 = OpLoad %float %54 | ||
%57 = OpInBoundsAccessChain %_ptr_TaskPayloadWorkgroupEXT_float %38 %uint_0 | ||
%58 = OpLoad %float %57 | ||
%59 = OpFAdd %float %58 %55 | ||
%60 = OpAccessChain %_ptr_Output_float %B %35 %uint_0 | ||
OpStore %60 %59 | ||
%61 = OpAccessChain %_ptr_Output_float %B %35 %uint_1 | ||
OpStore %61 %59 | ||
%62 = OpAccessChain %_ptr_Output_float %B %35 %uint_2 | ||
OpStore %62 %59 | ||
%63 = OpAccessChain %_ptr_Output_float %B %35 %uint_3 | ||
OpStore %63 %59 | ||
%64 = OpULessThan %bool %35 %uint_8 | ||
OpSelectionMerge %87 None | ||
OpBranchConditional %64 %86 %87 | ||
%86 = OpLabel | ||
%65 = OpIMul %uint %35 %uint_3 | ||
%66 = OpIAdd %uint %65 %uint_1 | ||
%67 = OpIAdd %uint %65 %uint_2 | ||
%68 = OpCompositeConstruct %v3uint %65 %66 %67 | ||
%70 = OpAccessChain %_ptr_Output_v3uint %indices %35 | ||
OpStore %70 %68 | ||
%71 = OpBitwiseAnd %uint %35 %uint_1 | ||
%72 = OpINotEqual %bool %71 %uint_0 | ||
%74 = OpAccessChain %_ptr_Output_bool %SV_CullPrimitive %35 | ||
OpStore %74 %72 | ||
%76 = OpAccessChain %_ptr_Output_uint %SV_PrimitiveID %35 | ||
OpStore %76 %35 | ||
%77 = OpAccessChain %_ptr_Output_uint %SV_RenderTargetArrayIndex %35 | ||
OpStore %77 %35 | ||
%78 = OpBitwiseXor %uint %35 %uint_2 | ||
%79 = OpAccessChain %_ptr_Workgroup_float %32 %78 | ||
%80 = OpLoad %float %79 | ||
%81 = OpAccessChain %_ptr_Output_float %C %35 %uint_0 | ||
OpStore %81 %80 | ||
%82 = OpAccessChain %_ptr_Output_float %C %35 %uint_1 | ||
OpStore %82 %80 | ||
%83 = OpAccessChain %_ptr_Output_float %C %35 %uint_2 | ||
OpStore %83 %80 | ||
%84 = OpAccessChain %_ptr_Output_float %C %35 %uint_3 | ||
OpStore %84 %80 | ||
OpBranch %87 | ||
%87 = OpLabel | ||
OpReturn | ||
OpFunctionEnd |
18 changes: 18 additions & 0 deletions
18
shaders-no-opt/mesh/invariant-position-mesh.spv14.nocompat.vk.mesh
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,18 @@ | ||
#version 450 | ||
#extension GL_EXT_mesh_shader : require | ||
layout(max_vertices = 3, max_primitives = 1, triangles) out; | ||
layout(local_size_x = 1) in; | ||
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out gl_MeshPerVertexEXT | ||
{ | ||
invariant vec4 gl_Position; | ||
} gl_MeshVerticesEXT[3]; | ||
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void main() | ||
{ | ||
SetMeshOutputsEXT(3, 1); | ||
gl_MeshVerticesEXT[0].gl_Position = vec4(1.0); | ||
gl_MeshVerticesEXT[1].gl_Position = vec4(1.0); | ||
gl_MeshVerticesEXT[2].gl_Position = vec4(1.0); | ||
gl_PrimitiveTriangleIndicesEXT[0] = uvec3(0, 1, 2); | ||
} |
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