draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_PERSPECTIVE, src);
vdecl[nr_decls].identity.usage = SVGA3D_DECLUSAGE_TEXCOORD;
vdecl[nr_decls].identity.type = SVGA3D_DECLTYPE_FLOAT4;
draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_PERSPECTIVE, src);
vdecl[nr_decls].identity.usage = SVGA3D_DECLUSAGE_TEXCOORD;
vdecl[nr_decls].identity.type = SVGA3D_DECLTYPE_FLOAT4;