Add trapezoid delta to the padstack API definition

api/proto/board/board_types.proto

@@ -246,6 +246,10 @@ message PadStackLayer
 
   // Reserved for future use -- at the moment, zone connection settings are not per-layer
   ZoneConnectionSettings zone_settings = 9;
+
+  // The difference in side length between the short and long pads in a trapezoid.  Only one of x or y may be nonzero.
+  // Only used for PSS_TRAPEZOID
+  kiapi.common.types.Vector2 trapezoid_delta = 10;
 }
 
 enum SolderMaskMode

pcbnew/api/api_handler_pcb.cpp

@@ -433,6 +433,8 @@ HANDLER_RESULT<GetItemsResponse> API_HANDLER_PCB::handleGetItems( GetItems& aMsg
 
             if( inserted )
                 typesInserted.insert( PCB_SHAPE_T );
+
+            break;
         }
 
         default:

pcbnew/padstack.cpp

@@ -169,6 +169,9 @@ bool PADSTACK::unpackCopperLayer( const kiapi::board::types::PadStackLayer& aPro
     props.chamfered_rect_ratio = aProto.chamfer_ratio();
     props.round_rect_radius_ratio = aProto.corner_rounding_ratio();
 
+    if( Shape( layer ) == PAD_SHAPE::TRAPEZOID && aProto.has_trapezoid_delta() )
+        TrapezoidDeltaSize( layer ) = kiapi::common::UnpackVector2( aProto.trapezoid_delta() );
+
     if( aProto.chamfered_corners().top_left() )
         props.chamfered_rect_positions |= RECT_CHAMFER_TOP_LEFT;
 
@@ -384,6 +387,12 @@ void PADSTACK::packCopperLayer( PCB_LAYER_ID aLayer, kiapi::board::types::PadSta
     stackLayer->set_chamfer_ratio( CopperLayer( aLayer ).shape.chamfered_rect_ratio );
     stackLayer->set_corner_rounding_ratio( CopperLayer( aLayer ).shape.round_rect_radius_ratio );
 
+    if( Shape( aLayer ) == PAD_SHAPE::TRAPEZOID )
+    {
+        kiapi::common::PackVector2( *stackLayer->mutable_trapezoid_delta(),
+                                    TrapezoidDeltaSize( aLayer ) );
+    }
+
     google::protobuf::Any a;
 
     for( const std::shared_ptr<PCB_SHAPE>& shape : Primitives( aLayer ) )