From 5fe58846132147502f8a8def56c28425e8a30323 Mon Sep 17 00:00:00 2001
From: Jonathan G Rennison <j.g.rennison@gmail.com>
Date: Sat, 26 Dec 2020 10:54:01 +0000
Subject: [PATCH] Debug: Add experimental command to switch baseset

---
 src/console_cmds.cpp | 23 +++++++++++++++++++++++
 src/date.cpp         |  1 +
 src/gfx.cpp          |  2 ++
 src/openttd.cpp      | 29 +++++++++++++++++++++++------
 src/openttd.h        |  1 +
 5 files changed, 50 insertions(+), 6 deletions(-)

diff --git a/src/console_cmds.cpp b/src/console_cmds.cpp
index 4d1e9dc59f..a178d567fd 100644
--- a/src/console_cmds.cpp
+++ b/src/console_cmds.cpp
@@ -49,6 +49,7 @@
 #include "industry.h"
 #include "string_func_extra.h"
 #include "linkgraph/linkgraphjob.h"
+#include "base_media_base.h"
 #include <time.h>
 
 #include "safeguards.h"
@@ -2810,6 +2811,27 @@ DEF_CONSOLE_CMD(ConRailTypeMapColourCtl)
 	return true;
 }
 
+DEF_CONSOLE_CMD(ConSwitchBaseset)
+{
+	if (argc != 2) {
+		IConsoleHelp("Debug: Try to switch baseset and reload NewGRFs. Usage: 'switch_baseset <baseset-name>'");
+		return true;
+	}
+
+	for (int i = 0; i < BaseGraphics::GetNumSets(); i++) {
+		const GraphicsSet *basegfx = BaseGraphics::GetSet(i);
+		if (argv[1] == basegfx->name) {
+			extern std::string _switch_baseset;
+			_switch_baseset = basegfx->name;
+			_check_special_modes = true;
+			return true;
+		}
+	}
+
+	IConsolePrintF(CC_WARNING, "No such baseset: %s.", argv[1]);
+	return 1;
+}
+
 #ifdef _DEBUG
 /******************
  *  debug commands
@@ -3031,6 +3053,7 @@ void IConsoleStdLibRegister()
 	IConsoleCmdRegister("delete_company", ConDeleteCompany, ConHookNewGRFDeveloperTool, true);
 	IConsoleCmdRegister("road_type_flag_ctl", ConRoadTypeFlagCtl, ConHookNewGRFDeveloperTool, true);
 	IConsoleCmdRegister("rail_type_map_colour_ctl", ConRailTypeMapColourCtl, ConHookNewGRFDeveloperTool, true);
+	IConsoleCmdRegister("switch_baseset", ConSwitchBaseset, ConHookNewGRFDeveloperTool, true);
 
 	/* Bug workarounds */
 	IConsoleCmdRegister("jgrpp_bug_workaround_unblock_heliports", ConResetBlockedHeliports, ConHookNoNetwork, true);
diff --git a/src/date.cpp b/src/date.cpp
index 5ce208e67a..45c19ae6f9 100644
--- a/src/date.cpp
+++ b/src/date.cpp
@@ -245,6 +245,7 @@ static void OnNewMonth()
 {
 	if (_settings_client.gui.autosave != 0 && (_cur_date_ymd.month % _autosave_months[_settings_client.gui.autosave]) == 0) {
 		_do_autosave = true;
+		_check_special_modes = true;
 		SetWindowDirty(WC_STATUS_BAR, 0);
 	}
 
diff --git a/src/gfx.cpp b/src/gfx.cpp
index 9d506b7dbd..1b5af57cd9 100644
--- a/src/gfx.cpp
+++ b/src/gfx.cpp
@@ -47,11 +47,13 @@ bool _right_button_down;    ///< Is right mouse button pressed?
 bool _right_button_clicked; ///< Is right mouse button clicked?
 DrawPixelInfo _screen;
 bool _screen_disable_anim = false;   ///< Disable palette animation (important for 32bpp-anim blitter during giant screenshot)
+bool _check_special_modes;
 bool _exit_game;
 GameMode _game_mode;
 SwitchMode _switch_mode;  ///< The next mainloop command.
 PauseMode _pause_mode;
 Palette _cur_palette;
+std::string _switch_baseset;
 
 static byte _stringwidth_table[FS_END][224]; ///< Cache containing width of often used characters. @see GetCharacterWidth()
 DrawPixelInfo *_cur_dpi;
diff --git a/src/openttd.cpp b/src/openttd.cpp
index 5698e42c58..15d3ca188f 100644
--- a/src/openttd.cpp
+++ b/src/openttd.cpp
@@ -1889,6 +1889,28 @@ static void DoAutosave()
 	}
 }
 
+void GameLoopSpecial()
+{
+	/* autosave game? */
+	if (_do_autosave) {
+		DoAutosave();
+		_do_autosave = false;
+		SetWindowDirty(WC_STATUS_BAR, 0);
+	}
+
+	extern std::string _switch_baseset;
+	if (!_switch_baseset.empty()) {
+		if (BaseGraphics::GetUsedSet()->name != _switch_baseset) {
+			BaseGraphics::SetSet(_switch_baseset);
+
+			ReloadNewGRFData();
+		}
+		_switch_baseset.clear();
+	}
+
+	_check_special_modes = false;
+}
+
 void GameLoop()
 {
 	if (_game_mode == GM_BOOTSTRAP) {
@@ -1900,12 +1922,7 @@ void GameLoop()
 
 	ProcessAsyncSaveFinish();
 
-	/* autosave game? */
-	if (_do_autosave) {
-		DoAutosave();
-		_do_autosave = false;
-		SetWindowDirty(WC_STATUS_BAR, 0);
-	}
+	if (unlikely(_check_special_modes)) GameLoopSpecial();
 
 	/* switch game mode? */
 	if (_switch_mode != SM_NONE && !HasModalProgress()) {
diff --git a/src/openttd.h b/src/openttd.h
index 1a2dae1bff..ded4254b02 100644
--- a/src/openttd.h
+++ b/src/openttd.h
@@ -55,6 +55,7 @@ enum ExtraDisplayOptions {
 
 extern GameMode _game_mode;
 extern SwitchMode _switch_mode;
+extern bool _check_special_modes;
 extern bool _exit_game;
 
 /** Modes of pausing we've got */