| #version 460 |
| |
| #define MAX_VER 81 |
| #define MAX_PRIM 32 |
| |
| #define BARRIER() \ |
| memoryBarrierShared(); \ |
| barrier(); |
| |
| #extension GL_EXT_mesh_shader : enable |
| |
| layout(local_size_x = 32, local_size_y=1, local_size_z=1) in; |
| |
| layout(max_vertices=MAX_VER) out; |
| layout(max_primitives=MAX_PRIM) out; |
| layout(triangles) out; |
| |
| // test use of builtins in mesh shaders: |
| |
| void main() |
| { |
| uint iid = gl_LocalInvocationID.x; |
| uint gid = gl_WorkGroupID.x; |
| uvec3 numWorkGrous = gl_NumWorkGroups; |
| uint vertexCount = MAX_VER; // vertexCount <= max_vertices |
| uint primitiveCount = MAX_PRIM; // primitiveCount <= max_primtives |
| SetMeshOutputsEXT(vertexCount, primitiveCount); |
| |
| gl_MeshVerticesEXT[iid].gl_Position = vec4(1.0); |
| gl_MeshVerticesEXT[iid].gl_PointSize = 2.0; |
| gl_MeshVerticesEXT[iid].gl_ClipDistance[3] = 3.0; |
| gl_MeshVerticesEXT[iid].gl_CullDistance[2] = 4.0; |
| |
| BARRIER(); |
| |
| gl_MeshVerticesEXT[iid+1].gl_Position = gl_MeshVerticesEXT[iid].gl_Position; |
| gl_MeshVerticesEXT[iid+1].gl_PointSize = gl_MeshVerticesEXT[iid].gl_PointSize; |
| gl_MeshVerticesEXT[iid+1].gl_ClipDistance[3] = gl_MeshVerticesEXT[iid].gl_ClipDistance[3]; |
| gl_MeshVerticesEXT[iid+1].gl_CullDistance[2] = gl_MeshVerticesEXT[iid].gl_CullDistance[2]; |
| |
| BARRIER(); |
| |
| gl_MeshPrimitivesEXT[iid].gl_PrimitiveID = 6; |
| gl_MeshPrimitivesEXT[iid].gl_Layer = 7; |
| gl_MeshPrimitivesEXT[iid].gl_ViewportIndex = 8; |
| gl_MeshPrimitivesEXT[iid].gl_CullPrimitiveEXT = false; |
| |
| BARRIER(); |
| |
| gl_MeshPrimitivesEXT[iid+1].gl_PrimitiveID = gl_MeshPrimitivesEXT[iid].gl_PrimitiveID; |
| gl_MeshPrimitivesEXT[iid+1].gl_Layer = gl_MeshPrimitivesEXT[iid].gl_Layer; |
| gl_MeshPrimitivesEXT[iid+1].gl_ViewportIndex = gl_MeshPrimitivesEXT[iid].gl_ViewportIndex; |
| gl_MeshPrimitivesEXT[iid+1].gl_CullPrimitiveEXT = gl_MeshPrimitivesEXT[iid].gl_CullPrimitiveEXT; |
| |
| BARRIER(); |
| |
| // check bound limits |
| gl_PrimitiveTriangleIndicesEXT[0] = uvec3(257); // should truncate 257 -> 1, range is between [0, vertexCount-1] |
| gl_PrimitiveTriangleIndicesEXT[primitiveCount - 1] = uvec3(2); // array size is primitiveCount*3 for triangle |
| gl_PrimitiveTriangleIndicesEXT[gid] = gl_PrimitiveTriangleIndicesEXT[gid-1]; |
| |
| BARRIER(); |
| } |
| |
| // test use of builtins enabled by other extensions |
| #extension GL_ARB_shader_draw_parameters : enable |
| #extension GL_EXT_multiview : enable |
| |
| void testAdditionalBuiltins() |
| { |
| int id = gl_DrawIDARB; // GL_ARB_shader_draw_parameters |
| int viewIdx = gl_ViewIndex; // GL_EXT_multiview |
| |
| } |