[core] Added Map::latLngBoundsForCamera

include/mbgl/map/camera.hpp

@@ -36,6 +36,19 @@ struct CameraOptions {
     optional<double> pitch;
 };
 
+constexpr bool operator==(const CameraOptions& a, const CameraOptions& b) {
+    return a.center == b.center
+        && a.padding == b.padding
+        && a.anchor == b.anchor
+        && a.zoom == b.zoom
+        && a.angle == b.angle
+        && a.pitch == b.pitch;
+}
+
+constexpr bool operator!=(const CameraOptions& a, const CameraOptions& b) {
+    return !(a == b);
+}
+
 /** Various options for describing a transition between viewpoints with
     animation. All fields are optional; the default values depend on how this
     struct is used. */

include/mbgl/map/map.hpp

@@ -107,6 +107,7 @@ public:
     void setLatLngZoom(const LatLng&, double zoom, optional<EdgeInsets>, const AnimationOptions& = {});
     CameraOptions cameraForLatLngBounds(const LatLngBounds&, optional<EdgeInsets>) const;
     CameraOptions cameraForLatLngs(const std::vector<LatLng>&, optional<EdgeInsets>) const;
+    LatLngBounds latLngBoundsForCamera(const CameraOptions&) const;
     void resetZoom();
     void setMinZoom(const double minZoom);
     double getMinZoom() const;

include/mbgl/util/geo.hpp

@@ -218,4 +218,12 @@ public:
     ScreenCoordinate getCenter(uint16_t width, uint16_t height) const;
 };
 
+constexpr bool operator==(const EdgeInsets& a, const EdgeInsets& b) {
+    return a.top == b.top && a.left == b.left && a.bottom == b.bottom && a.right == b.right;
+}
+
+constexpr bool operator!=(const EdgeInsets& a, const EdgeInsets& b) {
+    return !(a == b);
+}
+
 } // namespace mbgl