Add a scope info logger for DoSetViewportPosition calls

src/scope_info.cpp

@@ -16,6 +16,8 @@
 #include "station_base.h"
 #include "waypoint_base.h"
 #include "map_func.h"
+#include "window_func.h"
+#include "window_gui.h"
 #include "table/strings.h"
 
 #include "safeguards.h"
@@ -133,3 +135,9 @@ const char *scope_dumper::TileInfo(TileIndex tile)
 	DumpTileInfo(this->buffer, lastof(this->buffer), tile);
 	return this->buffer;
 }
+
+const char *scope_dumper::WindowInfo(const Window *w)
+{
+	DumpWindowInfo(this->buffer, lastof(this->buffer), w);
+	return this->buffer;
+}

src/scope_info.h

@@ -17,6 +17,7 @@
 
 struct Vehicle;
 struct BaseStation;
+struct Window;
 
 #ifdef USE_SCOPE_INFO
 
@@ -71,6 +72,7 @@ struct scope_dumper {
 	const char *VehicleInfo(const Vehicle *v);
 	const char *StationInfo(const BaseStation *st);
 	const char *TileInfo(TileIndex tile);
+	const char *WindowInfo(const Window *w);
 
 private:
 	char buffer[512];

src/viewport.cpp

@@ -106,6 +106,7 @@
 #include "core/container_func.hpp"
 #include "tunnelbridge_map.h"
 #include "video/video_driver.hpp"
+#include "scope_info.h"
 
 #include <map>
 #include <vector>
@@ -665,6 +666,7 @@ static void SetViewportPosition(Window *w, int x, int y, bool force_update_overl
 		if (i >= 0) height -= i;
 
 		if (height > 0 && (_vp_move_offs.x != 0 || _vp_move_offs.y != 0)) {
+			SCOPE_INFO_FMT([&], "DoSetViewportPosition: %d, %d, %d, %d, %d, %d, %s", left, top, width, height, _vp_move_offs.x, _vp_move_offs.y, scope_dumper().WindowInfo(w));
 			DoSetViewportPosition((Window *) w->z_front, left, top, width, height);
 			ClearViewPortCache(w->viewport);
 		}