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diff --git a/src/layers.hpp b/src/layers.hpp
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+/*
+ * Copyright (C) 2017 Mentor Graphics Development (Deutschland) GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef TMCAGLWM_LAYERS_H
+#define TMCAGLWM_LAYERS_H
+
+#include <json.hpp>
+
+#include <regex>
+#include <set>
+#include <string>
+
+#include "layout.hpp"
+#include "result.hpp"
+#include "wayland.hpp"
+
+namespace wm {
+
+struct split_layout {
+   std::string name;
+   std::string main_match;
+   std::string sub_match;
+};
+
+struct layer {
+   using json = nlohmann::json;
+
+   // A more or less descriptive name?
+   std::string name = "";
+   // The actual layer ID
+   int layer_id = -1;
+   // The rectangular region surfaces are allowed to draw on
+   // this layer, note however, width and hieght of the rect
+   // can be negative, in which case they specify that
+   // the actual value is computed using MAX + 1 - w
+   // That is; allow us to specify dimensions dependent on
+   // e.g. screen dimension, w/o knowing the actual screen size.
+   genivi::rect rect;
+   // Specify a role prefix for surfaces that should be
+   // put on this layer.
+   std::string role;
+   // XXX perhaps a zorder is needed here?
+   std::vector<struct split_layout> layouts;
+   // XXX need to change the way we store these things...
+   mutable struct LayoutState state;
+
+   explicit layer(nlohmann::json const &j);
+
+   json to_json() const;
+};
+
+struct layer_map {
+   using json = nlohmann::json;
+
+   using storage_type = std::map<int, struct layer>;
+   using layers_type = std::vector<uint32_t>;
+   using role_to_layer_map = std::vector<std::pair<std::string, int>>;
+   using addsurf_layer_map = std::map<int, int>;
+
+   // XXX: we also will need a layer_id to layer map, perhaps
+   // make this the primary map, and the surface_id->layer a
+   // secondary map.
+
+   storage_type mapping;  // map surface_id to layer
+   layers_type layers;    // the actual layer IDs we have
+   int main_surface;
+   std::string main_surface_name;
+   role_to_layer_map roles;
+   addsurf_layer_map surfaces;  // additional surfaces on layers
+
+   optional<int> get_layer_id(int surface_id);
+   optional<int> get_layer_id(std::string const &role);
+   optional<struct LayoutState*> get_layout_state(int surface_id) {
+      int layer_id = *this->get_layer_id(surface_id);
+      auto i = this->mapping.find(layer_id);
+      return i == this->mapping.end()
+                ? nullopt
+                : optional<struct LayoutState *>(&i->second.state);
+   }
+   optional<struct layer> get_layer(int layer_id) {
+      auto i = this->mapping.find(layer_id);
+      return i == this->mapping.end() ? nullopt
+                                      : optional<struct layer>(i->second);
+   }
+
+   layers_type::size_type get_layers_count() const {
+      return this->layers.size();
+   }
+
+   void add_surface(int surface_id, int layer_id) {
+      this->surfaces[surface_id] = layer_id;
+   }
+
+   void remove_surface(int surface_id) {
+      this->surfaces.erase(surface_id);
+   }
+
+   json to_json() const;
+};
+
+struct result<struct layer_map> to_layer_map(nlohmann::json const &j);
+
+}  // namespace wm
+
+#endif  // TMCAGLWM_LAYERS_H