Test/spv.ext.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_EXT_mesh_shader : enable
  11
  12 layout(local_size_x = 32, local_size_y=1, local_size_z=1) 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     uvec3 numWorkGrous = gl_NumWorkGroups;
  25     uint vertexCount = MAX_VER; // vertexCount <= max_vertices
  26     uint primitiveCount = MAX_PRIM; // primitiveCount <= max_primtives
  27     SetMeshOutputsEXT(vertexCount, primitiveCount);
  28
  29     gl_MeshVerticesEXT[iid].gl_Position = vec4(1.0);
  30     gl_MeshVerticesEXT[iid].gl_PointSize = 2.0;
  31     gl_MeshVerticesEXT[iid].gl_ClipDistance[3] = 3.0;
  32     gl_MeshVerticesEXT[iid].gl_CullDistance[2] = 4.0;
  33
  34     BARRIER();
  35
  36     gl_MeshVerticesEXT[iid+1].gl_Position = gl_MeshVerticesEXT[iid].gl_Position;
  37     gl_MeshVerticesEXT[iid+1].gl_PointSize = gl_MeshVerticesEXT[iid].gl_PointSize;
  38     gl_MeshVerticesEXT[iid+1].gl_ClipDistance[3] = gl_MeshVerticesEXT[iid].gl_ClipDistance[3];
  39     gl_MeshVerticesEXT[iid+1].gl_CullDistance[2] = gl_MeshVerticesEXT[iid].gl_CullDistance[2];
  40
  41     BARRIER();
  42
  43     gl_MeshPrimitivesEXT[iid].gl_PrimitiveID = 6;
  44     gl_MeshPrimitivesEXT[iid].gl_Layer = 7;
  45     gl_MeshPrimitivesEXT[iid].gl_ViewportIndex = 8;
  46     gl_MeshPrimitivesEXT[iid].gl_CullPrimitiveEXT = false;
  47
  48     BARRIER();
  49
  50     gl_MeshPrimitivesEXT[iid+1].gl_PrimitiveID = gl_MeshPrimitivesEXT[iid].gl_PrimitiveID;
  51     gl_MeshPrimitivesEXT[iid+1].gl_Layer = gl_MeshPrimitivesEXT[iid].gl_Layer;
  52     gl_MeshPrimitivesEXT[iid+1].gl_ViewportIndex = gl_MeshPrimitivesEXT[iid].gl_ViewportIndex;
  53     gl_MeshPrimitivesEXT[iid+1].gl_CullPrimitiveEXT = gl_MeshPrimitivesEXT[iid].gl_CullPrimitiveEXT;
  54
  55     BARRIER();
  56
  57     // check bound limits
  58     gl_PrimitiveTriangleIndicesEXT[0] = uvec3(257); // should truncate 257 -> 1, range is between [0, vertexCount-1]
  59     gl_PrimitiveTriangleIndicesEXT[primitiveCount - 1] = uvec3(2); // array size is primitiveCount*3 for triangle
  60     gl_PrimitiveTriangleIndicesEXT[gid] = gl_PrimitiveTriangleIndicesEXT[gid-1];
  61
  62     BARRIER();
  63 }
  64
  65 // test use of builtins enabled by other extensions
  66 #extension GL_ARB_shader_draw_parameters : enable
  67 #extension GL_EXT_multiview : enable
  68
  69 void testAdditionalBuiltins()
  70 {
  71     int id = gl_DrawIDARB; // GL_ARB_shader_draw_parameters
  72     int viewIdx = gl_ViewIndex; // GL_EXT_multiview
  73
  74 }