* Add PatchManager - Allows you to patch terrain.png and items.png on the fly.

This can be used for modding, since you don't need to share copyrighted Mojang assets alongside your texture patches.

source/client/renderer/PatchManager.hpp

@@ -0,0 +1,80 @@
+#pragma once
+
+#include <string>
+#include <vector>
+#include <sstream>
+
+class AppPlatform;
+
+enum ePatchType
+{
+	TYPE_NONE,
+	TYPE_TERRAIN,
+	TYPE_ITEMS,
+	TYPE_FEATURE,
+};
+
+enum ePatchOption
+{
+	PO_NONE,
+	PO_GRASS_TINT,
+};
+
+struct PatchData
+{
+	ePatchType m_type;
+	ePatchOption m_option;
+	int m_destX, m_destY;
+	std::string m_filename;
+	bool m_bEnable;
+
+	PatchData(ePatchType type, int x, int y, const std::string& fn)
+	{
+		_init();
+		m_type = type;
+		m_destX = x * 16;
+		m_destY = y * 16;
+		m_filename = fn;
+	}
+
+	PatchData(ePatchType type, ePatchOption opt, bool enable)
+	{
+		_init();
+		m_type = type;
+		m_option = opt;
+		m_bEnable = enable;
+	}
+
+	void _init()
+	{
+		m_type = TYPE_NONE;
+		m_option = PO_NONE;
+		m_destX = m_destY = 0;
+		m_bEnable = false;
+	}
+};
+
+class PatchManager
+{
+public:
+	PatchManager();
+
+	void LoadPatchData(const std::string& patchData);
+
+	void PatchTextures(AppPlatform*, ePatchType);
+
+	// Features
+	bool IsGrassTinted();
+	int  GetMetalSideYOffset();
+
+private:
+	void ReadBool(std::istream& is, bool& b);
+	void ReadInt(std::istream& is, int& b);
+
+private:
+	bool m_bGrassTinted;
+	int m_nMetalSideYOffset;
+	std::vector<PatchData> m_patchData;
+};
+
+PatchManager* GetPatchManager();