From 17560801e4b1071897d5e87c1fac53443b209596 Mon Sep 17 00:00:00 2001
From: Ketmar Dark <ketmar@ketmar.no-ip.org>
Date: Thu, 21 Sep 2017 15:21:43 +0300
Subject: [PATCH] don't load unused textures

---
 src/game/g_map.pas | 70 +++++++++++++++++++++++++++++++---------------
 1 file changed, 47 insertions(+), 23 deletions(-)

diff --git a/src/game/g_map.pas b/src/game/g_map.pas
index 46db3fa..b1174c8 100644
--- a/src/game/g_map.pas
+++ b/src/game/g_map.pas
@@ -1621,7 +1621,7 @@ var
   PanelID: DWORD;
   AddTextures: TAddTextureArray;
   TriggersTable: array of TTRec;
-  FileName, mapResName, s, TexName: String;
+  FileName, mapResName, TexName, s: AnsiString;
   Data: Pointer;
   Len: Integer;
   ok, isAnim: Boolean;
@@ -1634,6 +1634,7 @@ var
   //moveActive: Boolean;
   pan: TPanel;
   mapOk: Boolean = false;
+  usedTextures: THashStrInt = nil; // key: mapTextureList
 begin
   mapGrid.Free();
   mapGrid := nil;
@@ -1747,31 +1748,53 @@ begin
       e_WriteLog('  Loading textures:', TMsgType.Notify);
       g_Game_SetLoadingText(_lc[I_LOAD_TEXTURES], mapTextureList.count-1, False);
 
-      cnt := -1;
-      for rec in mapTextureList do
-      begin
-        Inc(cnt);
-        s := rec.Resource;
-        {$IF DEFINED(D2F_DEBUG_TXLOAD)}
-        e_WriteLog(Format('    Loading texture #%d: %s', [cnt, s]), TMsgType.Notify);
-        {$ENDIF}
-        //if g_Map_IsSpecialTexture(s) then e_WriteLog('      SPECIAL!', MSG_NOTIFY);
-        if rec.Anim then
-        begin
-          // Àíèìèðîâàííàÿ òåêñòóðà
-          ntn := CreateAnimTexture(rec.Resource, FileName, True);
-          if (ntn < 0) then g_SimpleError(Format(_lc[I_GAME_ERROR_TEXTURE_ANIM], [s]));
-        end
-        else
+      // find used textures
+      usedTextures := hashNewStrInt();
+      try
+        if (panels <> nil) and (panels.count > 0) then
         begin
-          // Îáû÷íàÿ òåêñòóðà
-          ntn := CreateTexture(rec.Resource, FileName, True);
-          if (ntn < 0) then g_SimpleError(Format(_lc[I_GAME_ERROR_TEXTURE_SIMPLE], [s]));
+          for rec in panels do
+          begin
+            texrec := rec.TextureRec;
+            if (texrec <> nil) then usedTextures.put(toLowerCase1251(texrec.Resource), 42);
+          end;
         end;
-        if (ntn < 0) then ntn := CreateNullTexture(rec.Resource);
 
-        rec.tagInt := ntn; // remember texture number
-        g_Game_StepLoading();
+        cnt := -1;
+        for rec in mapTextureList do
+        begin
+          Inc(cnt);
+          if not usedTextures.has(toLowerCase1251(rec.Resource)) then
+          begin
+            rec.tagInt := -1; // just in case
+            e_LogWritefln('    Unused texture #%d: %s', [cnt, rec.Resource]);
+          end
+          else
+          begin
+            {$IF DEFINED(D2F_DEBUG_TXLOAD)}
+            e_LogWritefln('    Loading texture #%d: %s', [cnt, rec.Resource]);
+            {$ENDIF}
+            //if g_Map_IsSpecialTexture(s) then e_WriteLog('      SPECIAL!', MSG_NOTIFY);
+            if rec.Anim then
+            begin
+              // Àíèìèðîâàííàÿ òåêñòóðà
+              ntn := CreateAnimTexture(rec.Resource, FileName, True);
+              if (ntn < 0) then g_SimpleError(Format(_lc[I_GAME_ERROR_TEXTURE_ANIM], [rec.Resource]));
+            end
+            else
+            begin
+              // Îáû÷íàÿ òåêñòóðà
+              ntn := CreateTexture(rec.Resource, FileName, True);
+              if (ntn < 0) then g_SimpleError(Format(_lc[I_GAME_ERROR_TEXTURE_SIMPLE], [rec.Resource]));
+            end;
+            if (ntn < 0) then ntn := CreateNullTexture(rec.Resource);
+
+            rec.tagInt := ntn; // remember texture number
+          end;
+          g_Game_StepLoading();
+        end;
+      finally
+        usedTextures.Free();
       end;
 
       // set panel tagInt to texture index
@@ -1785,6 +1808,7 @@ begin
       end;
     end;
 
+
     // Çàãðóçêà òðèããåðîâ
     gTriggerClientID := 0;
     e_WriteLog('  Loading triggers...', TMsgType.Notify);
-- 
2.29.2