From b23983c0b854d7594ed5d0ea625393dc125616a7 Mon Sep 17 00:00:00 2001
From: AllyTally <alexiatilde@gmail.com>
Date: Thu, 30 Nov 2023 22:24:10 -0400
Subject: [PATCH] Fix BG tile bug from switching from pink SS

If you had a pink space station background, and switched to a different
tileset, some solid tiles would be placed instead. This commit fixes
that by transforming the room into the basic autotiling tiles before
changing the tileset itself. The reason why I chose this solution is
because it will help with a future change, being unhardcoding warp zone
backgrounds (which'll help with custom autotiling, if that becomes a
thing.)
---
 desktop_version/src/Editor.cpp | 42 ++++++++++++++++++++++++++++++++++
 desktop_version/src/Editor.h   |  2 ++
 2 files changed, 44 insertions(+)

diff --git a/desktop_version/src/Editor.cpp b/desktop_version/src/Editor.cpp
index d6ded494..55c70583 100644
--- a/desktop_version/src/Editor.cpp
+++ b/desktop_version/src/Editor.cpp
@@ -4017,8 +4017,48 @@ bool editorclass::lines_can_pass(int x, int y)
     return false;
 }
 
+void editorclass::make_autotiling_base(void)
+{
+    if (cl.getroomprop(levx, levy)->directmode == 1)
+    {
+        return;
+    }
+
+    for (int i = 0; i < SCREEN_WIDTH_TILES * SCREEN_HEIGHT_TILES; i++)
+    {
+        int tile_x = i % SCREEN_WIDTH_TILES;
+        int tile_y = i / SCREEN_WIDTH_TILES;
+        int tile = get_tile(tile_x, tile_y);
+
+        if (tile == 0)
+        {
+            continue;
+        }
+
+        TileTypes type = get_tile_type(tile_x, tile_y, false);
+
+        switch (type)
+        {
+        case TileType_NONSOLID:
+            if (type == TileType_NONSOLID || is_warp_zone_background(tile))
+            {
+                set_tile(tile_x, tile_y, 2);
+            }
+            break;
+        case TileType_SOLID:
+            set_tile(tile_x, tile_y, 1);
+            break;
+        case TileType_SPIKE:
+            set_tile(tile_x, tile_y, 6);
+            break;
+        }
+    }
+}
+
 void editorclass::switch_tileset(const bool reversed)
 {
+    make_autotiling_base();
+
     int tiles = cl.getroomprop(levx, levy)->tileset;
 
     if (reversed)
@@ -4052,6 +4092,8 @@ void editorclass::switch_tileset(const bool reversed)
 
 void editorclass::switch_tilecol(const bool reversed)
 {
+    make_autotiling_base();
+
     int tilecol = cl.getroomprop(levx, levy)->tilecol;
 
     if (reversed)
diff --git a/desktop_version/src/Editor.h b/desktop_version/src/Editor.h
index 149cb005..f0f879db 100644
--- a/desktop_version/src/Editor.h
+++ b/desktop_version/src/Editor.h
@@ -177,6 +177,8 @@ public:
 
     bool lines_can_pass(int x, int y);
 
+    void make_autotiling_base(void);
+
     int get_enemy_tile(int t);
 
     void switch_tileset(const bool reversed);