/*
 * Copyright (C) 2009 Tugrul Galatali <tugrul@galatali.com>
 *
 * 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 of the License, 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef TEXMGR_H
#define TEXMGR_H

#include <string>
#include <pthread.h>
#include <dirent.h>
#include <stdlib.h>

#include "config.h"

class TexMgr
{
	public:
		TexMgr();
		~TexMgr();

		void setImageDir(const char *newDirName);
		void setTexSize(const unsigned int &w, const unsigned int &h) { tw = w; th = h; }
		void setGenTexSize(const unsigned int &w, const unsigned int &h) { gw = w; gh = h; }

		void start();
		void stop();

		bool getNext();
		unsigned int *getCurTex() const { return curTex; }
		unsigned int getCurW() const { return curW; }
		unsigned int getCurH() const { return curH; }
		unsigned int *getPrevTex() const { return prevTex; }
		unsigned int getPrevW() const { return prevW; }
		unsigned int getPrevH() const { return prevH; }

	private:
		int tw, th;
		unsigned int *prevTex;
		unsigned int prevW, prevH;
		unsigned int *curTex;
		unsigned int curW, curH;
		unsigned int *nextTex;
		unsigned int nextW, nextH;
		bool ready;

		std::string dirName;
		DIR *imageDir;

		pthread_t *imageThread;
		pthread_mutex_t *nextTexMutex;
		pthread_cond_t *nextTexCond;
		volatile bool exiting;

		unsigned int gw, gh;
#ifdef HAVE_RANDOM_R
		struct random_data randomState;
		char randomBuf[256];
#elif defined(HAVE_NRAND48)
		unsigned short int randomState[3];
#endif
		void genTex();

		void loadNextImageFromDisk();

		static void *imageThreadMain(void *vp);
};

#endif