1layout(metal, spirv, wgsl, gl, binding = 0) uniform ubo { float f; }; // multiple backends 2layout(texture=0, sampler=0) uniform sampler2D s; // invalid (requires backend) 3 4/*%%* 5only one backend qualifier can be used 6layout qualifier 'texture' is not permitted here 7layout qualifier 'sampler' is not permitted here 8*%%*/ 9