Test/spv.meshShaderBuiltins.mesh

   1 #version 460
   2
   3 #define MAX_VER  81
   4 #define MAX_PRIM 32
   5
   6 #define BARRIER() \
   7     memoryBarrierShared(); \
   8     barrier();
   9
  10 #extension GL_NV_mesh_shader : enable
  11
  12 layout(local_size_x = 32) in;
  13
  14 layout(max_vertices=MAX_VER) out;
  15 layout(max_primitives=MAX_PRIM) out;
  16 layout(triangles) out;
  17
  18 // test use of builtins in mesh shaders:
  19
  20 void main()
  21 {
  22     uint iid = gl_LocalInvocationID.x;
  23     uint gid = gl_WorkGroupID.x;
  24
  25     gl_MeshVerticesNV[iid].gl_Position = vec4(1.0);
  26     gl_MeshVerticesNV[iid].gl_PointSize = 2.0;
  27     gl_MeshVerticesNV[iid].gl_ClipDistance[3] = 3.0;
  28     gl_MeshVerticesNV[iid].gl_CullDistance[2] = 4.0;
  29
  30     BARRIER();
  31
  32     gl_MeshVerticesNV[iid+1].gl_Position = gl_MeshVerticesNV[iid].gl_Position;
  33     gl_MeshVerticesNV[iid+1].gl_PointSize = gl_MeshVerticesNV[iid].gl_PointSize;
  34     gl_MeshVerticesNV[iid+1].gl_ClipDistance[3] = gl_MeshVerticesNV[iid].gl_ClipDistance[3];
  35     gl_MeshVerticesNV[iid+1].gl_CullDistance[2] = gl_MeshVerticesNV[iid].gl_CullDistance[2];
  36
  37     BARRIER();
  38
  39     gl_MeshPrimitivesNV[iid].gl_PrimitiveID = 6;
  40     gl_MeshPrimitivesNV[iid].gl_Layer = 7;
  41     gl_MeshPrimitivesNV[iid].gl_ViewportIndex = 8;
  42     gl_MeshPrimitivesNV[iid].gl_ViewportMask[0] = 9;
  43
  44     BARRIER();
  45
  46     gl_MeshPrimitivesNV[iid+1].gl_PrimitiveID = gl_MeshPrimitivesNV[iid].gl_PrimitiveID;
  47     gl_MeshPrimitivesNV[iid+1].gl_Layer = gl_MeshPrimitivesNV[iid].gl_Layer;
  48     gl_MeshPrimitivesNV[iid+1].gl_ViewportIndex = gl_MeshPrimitivesNV[iid].gl_ViewportIndex;
  49     gl_MeshPrimitivesNV[iid+1].gl_ViewportMask[0] = gl_MeshPrimitivesNV[iid].gl_ViewportMask[0];
  50
  51     BARRIER();
  52
  53     // check bound limits
  54     gl_PrimitiveIndicesNV[0] = 257; // should truncate 257 -> 1
  55     gl_PrimitiveIndicesNV[(MAX_PRIM * 3) - 1] = 2;
  56     gl_PrimitiveIndicesNV[gid] = gl_PrimitiveIndicesNV[gid-1];
  57
  58     // writes 4 indices at offset gl_DrawID
  59     writePackedPrimitiveIndices4x8NV(gl_DrawID, 0x01020304);
  60
  61     gl_PrimitiveCountNV = MAX_PRIM * 3;
  62
  63     BARRIER();
  64 }