From 5f25fbb2e3f7502e3db9871b08e824657236e416 Mon Sep 17 00:00:00 2001
From: Christoph Oelckers <coelckers@users.noreply.github.com>
Date: Wed, 20 Feb 2019 00:22:00 +0100
Subject: [PATCH] - added support for localized texture replacements
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This reads the textures and builds the data tables, but doesn´t use the textures yet.
A bit more work is needed first.
---
 src/gamedata/textures/texturemanager.cpp | 69 +++++++++++++++++++++++-
 src/gamedata/textures/textures.h         |  3 ++
 2 files changed, 71 insertions(+), 1 deletion(-)

diff --git a/src/gamedata/textures/texturemanager.cpp b/src/gamedata/textures/texturemanager.cpp
index c26d36765..5562fe690 100644
--- a/src/gamedata/textures/texturemanager.cpp
+++ b/src/gamedata/textures/texturemanager.cpp
@@ -1012,12 +1012,79 @@ void FTextureManager::SortTexturesByType(int start, int end)
 	}
 }
 
+//==========================================================================
+//
+// FTextureManager :: AddLocalizedVariants
+//
+//==========================================================================
+
+void FTextureManager::AddLocalizedVariants()
+{
+	TArray<FolderEntry> content;
+	Wads.GetLumpsInFolder("localized/textures/", content, false);
+	for (auto &entry : content)
+	{
+		FString name = entry.name;
+		auto tokens = name.Split(".", FString::TOK_SKIPEMPTY);
+		if (tokens.Size() == 2)
+		{
+			auto ext = tokens[1];
+			// Do not interpret common extensions for images as language IDs.
+			if (ext.CompareNoCase("png") == 0 || ext.CompareNoCase("jpg") == 0 || ext.CompareNoCase("gfx") == 0 || ext.CompareNoCase("tga") == 0 || ext.CompareNoCase("lmp") == 0)
+			{
+				Printf("%s contains no language IDs and will be ignored\n", entry.name);
+				
+			}
+		}
+		else if (tokens.Size() >= 2)
+		{
+			FTextureID origTex = CheckForTexture(tokens[0], ETextureType::MiscPatch);
+			if (origTex.isValid())
+			{
+				FTextureID tex = CheckForTexture(entry.name, ETextureType::MiscPatch);
+				if (tex.isValid())
+				{
+					tokens[1].ToLower();
+					auto langids = tokens[1].Split("-", FString::TOK_SKIPEMPTY);
+					auto lang = langids.Last();
+					for (auto &lang : langids)
+					{
+						if (lang.Len() == 2 || lang.Len() == 3)
+						{
+							uint32_t langid = MAKE_ID(lang[0], lang[1], lang[2], 0);
+							uint64_t comboid = (uint64_t(langid) << 32) | tex.GetIndex();
+							LocalizedTextures.Insert(comboid, GetTexture(origTex));
+							Textures[origTex.GetIndex()].HasLocalization = true;
+						}
+						else
+						{
+							Printf("Invalid language ID in texture %s\n", entry.name);
+						}
+					}
+				}
+				else
+				{
+					Printf("%s is not a texture\n", entry.name);
+				}
+			}
+			else
+			{
+				Printf("Unknown texture %s for localized variant %s\n", tokens[0].GetChars(), entry.name);
+			}
+		}
+		else
+		{
+			Printf("%s contains no language IDs and will be ignored\n", entry.name);
+		}
+
+	}
+}
+
 //==========================================================================
 //
 // FTextureManager :: Init
 //
 //==========================================================================
-FTexture *GetBackdropTexture();
 FTexture *CreateShaderTexture(bool, bool);
 
 void FTextureManager::Init()
diff --git a/src/gamedata/textures/textures.h b/src/gamedata/textures/textures.h
index 8005be330..e2e2492f0 100644
--- a/src/gamedata/textures/textures.h
+++ b/src/gamedata/textures/textures.h
@@ -597,6 +597,7 @@ public:
 	void ParseTextureDef(int remapLump, FMultipatchTextureBuilder &build);
 	void SortTexturesByType(int start, int end);
 	bool AreTexturesCompatible (FTextureID picnum1, FTextureID picnum2);
+	void AddLocalizedVariants();
 
 	FTextureID CreateTexture (int lumpnum, ETextureType usetype=ETextureType::Any);	// Also calls AddTexture
 	FTextureID AddTexture (FTexture *texture);
@@ -662,9 +663,11 @@ private:
 	{
 		FTexture *Texture;
 		int HashNext;
+		bool HasLocalization;
 	};
 	enum { HASH_END = -1, HASH_SIZE = 1027 };
 	TArray<TextureHash> Textures;
+	TMap<uint64_t, FTexture*> LocalizedTextures;
 	TArray<int> Translation;
 	int HashFirst[HASH_SIZE];
 	FTextureID DefaultTexture;