1 files changed, 54 insertions, 0 deletions
diff --git a/include/mbgl/map/view.hpp b/include/mbgl/map/view.hpp
new file mode 100644
index 0000000000..92d60d4d02
--- /dev/null
+++ b/include/mbgl/map/view.hpp
@@ -0,0 +1,54 @@
+#ifndef MBGL_MAP_VIEW
+#define MBGL_MAP_VIEW
+
+#include <mbgl/util/time.hpp>
+
+namespace mbgl {
+
+class Map;
+
+enum MapChange : uint8_t {
+    MapChangeRegionWillChange = 0,
+    MapChangeRegionWillChangeAnimated = 1,
+    MapChangeRegionDidChange = 2,
+    MapChangeRegionDidChangeAnimated = 3,
+    MapChangeWillStartLoadingMap = 4,
+    MapChangeDidFinishLoadingMap = 5,
+    MapChangeDidFailLoadingMap = 6,
+    MapChangeWillStartRenderingMap = 7,
+    MapChangeDidFinishRenderingMap = 8,
+    MapChangeDidFinishRenderingMapFullyRendered = 9
+};
+
+class View {
+public:
+    virtual void initialize(Map *map) {
+        this->map = map;
+    }
+
+    // Called from the render (=GL) thread. Signals that the context should
+    // swap the front and the back buffer.
+    virtual void swap() = 0;
+
+    // Called from the render thread. Makes the GL context active in the current
+    // thread. This is typically just called once at the beginning of the
+    // renderer setup since the render thread doesn't switch the contexts.
+    virtual void make_active() = 0;
+
+    // Returns the base framebuffer object, if any, and 0 if using the system
+    // provided framebuffer.
+    virtual unsigned int root_fbo() {
+        return 0;
+    }
+
+    // Notifies a watcher of map x/y/scale/rotation changes.
+    // Must only be called from the same thread that caused the change.
+    // Must not be called from the render thread.
+    virtual void notify_map_change(MapChange change, timestamp delay = 0) = 0;
+
+protected:
+    mbgl::Map *map = nullptr;
+};
+}
+
+#endif