Make main game content use interface font instead of 8x8 font

If a custom level doesn't specify a font, it should be the 8x8 font.
But the main game can't specify a font, it's just the interface font
because that's for the language that the game is in.

desktop_version/src/Font.cpp

@@ -70,8 +70,9 @@ static FontContainer fonts_custom = {};
 
 static uint8_t font_idx_8x8 = 0;
 
-static bool font_idx_custom_is_custom = false;
-static uint8_t font_idx_custom = 0;
+static bool font_level_is_interface = false;
+static bool font_idx_level_is_custom = false;
+static uint8_t font_idx_level = 0;
 
 static void codepoint_split(
     const uint32_t codepoint,
@@ -404,31 +405,40 @@ uint8_t get_font_idx_8x8(void)
     return font_idx_8x8;
 }
 
-void set_custom_font(const char* name)
+void set_level_font(const char* name)
 {
-    /* Apply the choice for a certain level-specific font. */
+    /* Apply the choice for a certain level-specific font.
+     * This function is for custom levels. */
+    font_level_is_interface = false;
 
-    if (find_font_by_name(&fonts_custom, name, &font_idx_custom))
+    if (find_font_by_name(&fonts_custom, name, &font_idx_level))
     {
-        font_idx_custom_is_custom = true;
+        font_idx_level_is_custom = true;
     }
     else
     {
-        font_idx_custom_is_custom = false;
-        if (!find_font_by_name(&fonts_main, name, &font_idx_custom))
+        font_idx_level_is_custom = false;
+        if (!find_font_by_name(&fonts_main, name, &font_idx_level))
         {
             if (SDL_strcmp(name, "font") != 0)
             {
-                set_custom_font("font");
+                set_level_font("font");
             }
             else
             {
-                font_idx_custom = font_idx_8x8;
+                font_idx_level = font_idx_8x8;
             }
         }
     }
 }
 
+void set_level_font_interface(void)
+{
+    /* Set the level font equal to the interface font.
+     * This function is for the main game. */
+    font_level_is_interface = true;
+}
+
 static void load_font_filename(bool is_custom, const char* filename)
 {
     // Load font.png, and everything that matches *.fontmeta (but not font.fontmeta)
@@ -467,6 +477,7 @@ void load_main(void)
         load_font_filename(false, item);
     }
     FILESYSTEM_freeEnumerate(&handle);
+    font_idx_level = font_idx_8x8;
 }
 
 void load_custom(const char* name)
@@ -481,7 +492,7 @@ void load_custom(const char* name)
     }
     FILESYSTEM_freeEnumerate(&handle);
 
-    set_custom_font(name);
+    set_level_font(name);
 }
 
 void unload_font(Font* f)
@@ -559,17 +570,21 @@ static Font* fontsel_to_font(int sel)
 
     switch (sel)
     {
-    case 0:
-        return container_get(&fonts_main, loc::get_langmeta()->font_idx);
     case 1:
-        if (font_idx_custom_is_custom)
+        if (!font_level_is_interface)
         {
-            return container_get(&fonts_custom, font_idx_custom);
+            if (font_idx_level_is_custom)
+            {
+                return container_get(&fonts_custom, font_idx_level);
             }
             else
             {
-            return container_get(&fonts_main, font_idx_custom);
+                return container_get(&fonts_main, font_idx_level);
             }
+        }
+        SDL_FALLTHROUGH;
+    case 0:
+        return container_get(&fonts_main, loc::get_langmeta()->font_idx);
     case 2:
         return container_get(&fonts_main, font_idx_8x8);
     }

desktop_version/src/Font.h

@@ -64,7 +64,8 @@ bool find_main_font_by_name(const char* name, uint8_t* idx);
 const char* get_main_font_name(uint8_t idx);
 uint8_t get_font_idx_8x8(void);
 
-void set_custom_font(const char* name);
+void set_level_font(const char* name);
+void set_level_font_interface(void);
 void load_main(void);
 void load_custom(const char* name);
 void unload_custom(void);

desktop_version/src/Game.cpp

@@ -7186,7 +7186,7 @@ void Game::returntoeditor(void)
     ed.roomnamehide = 0;
 
     // Might've been changed in a script
-    font::set_custom_font(cl.level_font_name.c_str());
+    font::set_level_font(cl.level_font_name.c_str());
 
     DEFER_CALLBACK(resetbg);
     music.fadeout();

desktop_version/src/Script.cpp

@@ -2429,11 +2429,11 @@ void scriptclass::run(void)
 #ifndef NO_CUSTOM_LEVELS
                 if (words[1] == "")
                 {
-                    font::set_custom_font(cl.level_font_name.c_str());
+                    font::set_level_font(cl.level_font_name.c_str());
                 }
                 else
                 {
-                    font::set_custom_font(words[1].c_str());
+                    font::set_level_font(words[1].c_str());
                 }
 #endif
             }
@@ -2592,6 +2592,17 @@ void scriptclass::startgamemode(const enum StartMode mode)
         game.gamestate = GAMEMODE;
     }
 
+    switch (mode)
+    {
+    case Start_EDITOR:
+    case Start_EDITORPLAYTESTING:
+    case Start_CUSTOM:
+    case Start_CUSTOM_QUICKSAVE:
+        break;
+    default:
+        font::set_level_font_interface();
+    }
+
     game.jumpheld = true;
 
     switch (mode)