| #version 450 |
| #extension GL_EXT_mesh_shader : enable |
| #extension GL_NV_compute_shader_derivatives : require |
| |
| layout(local_size_x = 4) in; |
| layout(derivative_group_linearNV) in; |
| |
| layout(max_vertices = 3) out; |
| layout(max_primitives = 1) out; |
| layout(triangles) out; |
| |
| layout(binding = 0) uniform sampler2D tex; |
| layout(binding = 1, std430) buffer Output { |
| vec2 lod; |
| } outData; |
| |
| void main() |
| { |
| uint iid = gl_LocalInvocationIndex; |
| float localDx = dFdx(float(iid)); |
| vec2 localLod = textureQueryLod(tex, vec2(0.5f)); |
| |
| if (iid == 0u) { |
| SetMeshOutputsEXT(3u, 1u); |
| outData.lod = localLod; |
| gl_PrimitiveTriangleIndicesEXT[0] = uvec3(0u, 1u, 2u); |
| } |
| |
| if (iid < 3u) |
| gl_MeshVerticesEXT[iid].gl_Position = vec4(localDx + localLod.x); |
| } |
