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62 lines
2.9 KiB
62 lines
2.9 KiB
#version 450 |
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/* Copyright (c) 2023, Holochip Corporation |
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* |
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* SPDX-License-Identifier: Apache-2.0 |
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* |
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* Licensed under the Apache License, Version 2.0 the "License"; |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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#extension GL_EXT_mesh_shader: require |
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#extension GL_GOOGLE_include_directive: require |
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#include "mesh_shader_culling/mesh_shader_shared.h" |
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layout(local_size_x = numMeshInvocationsX, local_size_y = numMeshInvocationsY, local_size_z = 1) in; |
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// we'll emit 4 vertices on 2 primitives per mesh shader invocation |
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layout(triangles, max_vertices = 4 * numMeshInvocationsX * numMeshInvocationsY, max_primitives = 2 * numMeshInvocationsX * numMeshInvocationsY) out; |
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taskPayloadSharedEXT SharedData sharedData; |
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// Example of a default output layout and location format: |
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layout (location=3) out vec3 outColor[]; |
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void main() |
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{ |
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if ( gl_LocalInvocationIndex == 0 ) |
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{ |
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// set the number of vertices and primitives to put out just once for the complete workgroup |
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SetMeshOutputsEXT( 4 * numMeshInvocationsX * numMeshInvocationsY, 2 * numMeshInvocationsX * numMeshInvocationsY); |
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} |
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// determine 4 vertices by combining some global position and offset, as well as some local offset and size |
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vec2 globalOffset = sharedData.offsets[gl_WorkGroupID.x]; |
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vec2 localSize = sharedData.size / gl_WorkGroupSize.xy; |
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vec2 localOffset = gl_LocalInvocationID.xy * localSize; |
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vec2 v0 = sharedData.position + globalOffset + localOffset; |
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vec2 v1 = v0 + vec2( localSize.x, 0.0f ); |
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vec2 v2 = v0 + localSize; |
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vec2 v3 = v0 + vec2( 0.0f, localSize.y ); |
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uint vertexBaseIndex = 4 * gl_LocalInvocationIndex; |
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gl_MeshVerticesEXT[vertexBaseIndex + 0].gl_Position = vec4( v0, 0.0f, 1.0f ); |
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gl_MeshVerticesEXT[vertexBaseIndex + 1].gl_Position = vec4( v1, 0.0f, 1.0f ); |
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gl_MeshVerticesEXT[vertexBaseIndex + 2].gl_Position = vec4( v2, 0.0f, 1.0f ); |
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gl_MeshVerticesEXT[vertexBaseIndex + 3].gl_Position = vec4( v3, 0.0f, 1.0f ); |
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uint primitiveBaseIndex = 2 * gl_LocalInvocationIndex; |
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gl_PrimitiveTriangleIndicesEXT[primitiveBaseIndex + 0] = uvec3( vertexBaseIndex + 0, vertexBaseIndex + 1, vertexBaseIndex + 2 ); |
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gl_PrimitiveTriangleIndicesEXT[primitiveBaseIndex + 1] = uvec3( vertexBaseIndex + 2, vertexBaseIndex + 3, vertexBaseIndex + 0 ); |
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outColor[vertexBaseIndex + 0] = vec3( 1.0f, 0.0f, 0.0f ); |
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outColor[vertexBaseIndex + 1] = vec3( 0.0f, 1.0f, 0.0f ); |
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outColor[vertexBaseIndex + 2] = vec3( 0.0f, 0.0f, 1.0f ); |
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outColor[vertexBaseIndex + 3] = vec3( 1.0f, 1.0f, 0.0f ); |
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}
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