/*
 *	Copyright (C) 2007-2009 Gabest
 *	http://www.gabest.org
 *
 *  This Program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2, or (at your option)
 *  any later version.
 *
 *  This Program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with GNU Make; see the file COPYING.  If not, write to
 *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA USA.
 *  http://www.gnu.org/copyleft/gpl.html
 *
 */

#pragma once

#include "Renderers/Common/GSRenderer.h"
#include "Renderers/Common/GSFastList.h"

class GSTextureCacheSW
{
public:
	class Texture
	{
	public:
		GSState* m_state;
		GSOffset* m_offset;
		GIFRegTEX0 m_TEX0;
		GIFRegTEXA m_TEXA;
		void* m_buff;
		uint32 m_tw;
		uint32 m_age;
		bool m_complete;
		bool m_repeating;
		std::vector<GSVector2i>* m_p2t;
		uint32 m_valid[MAX_PAGES];
		std::array<uint16, MAX_PAGES> m_erase_it;
		struct {uint32 bm[16]; const uint32* n;} m_pages;
		const uint32* RESTRICT m_sharedbits;

		// m_valid
		// fast mode: each uint32 bits map to the 32 blocks of that page
		// repeating mode: 1 bpp image of the texture tiles (8x8), also having 512 elements is just a coincidence (worst case: (1024*1024)/(8*8)/(sizeof(uint32)*8))

		Texture(GSState* state, uint32 tw0, const GIFRegTEX0& TEX0, const GIFRegTEXA& TEXA);
		virtual ~Texture();

		bool Update(const GSVector4i& r);
		bool Save(const std::string& fn, bool dds = false) const;
	};

protected:
	GSState* m_state;
	std::unordered_set<Texture*> m_textures;
	std::array<FastList<Texture*>, MAX_PAGES> m_map;

public:
	GSTextureCacheSW(GSState* state);
	virtual ~GSTextureCacheSW();

	Texture* Lookup(const GIFRegTEX0& TEX0, const GIFRegTEXA& TEXA, uint32 tw0 = 0);

	void InvalidatePages(const uint32* pages, uint32 psm);

	void RemoveAll();
	void IncAge();
};
