/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#ifndef __FREESTYLE_STROKE_RENDERER_H__
#define __FREESTYLE_STROKE_RENDERER_H__

/** \file blender/freestyle/intern/stroke/StrokeRenderer.h
 *  \ingroup freestyle
 *  \brief Classes to render a stroke with OpenGL
 *  \author Fredo Durand
 *  \date 09/09/2002
 */

#include <map>
#include <string.h>
#include <algorithm>
#include <utility>
#include <vector>

#include "Stroke.h"
#include "StrokeRep.h"

#include "../system/FreestyleConfig.h"

#ifdef WITH_CXX_GUARDEDALLOC
#include "MEM_guardedalloc.h"
#endif

namespace Freestyle {

/**********************************/
/*                                */
/*                                */
/*         TextureManager         */
/*                                */
/*                                */
/**********************************/


/*! Class to load textures */
class TextureManager
{
public:
	TextureManager ();
	virtual ~TextureManager ();

	static TextureManager *getInstance()
	{
		return _pInstance;
	}

	void load();
	unsigned getBrushTextureIndex(string name, Stroke::MediumType iType = Stroke::OPAQUE_MEDIUM);

	inline bool hasLoaded() const
	{
		return _hasLoadedTextures;
	}

	inline unsigned int getDefaultTextureId() const
	{
		return _defaultTextureId;
	}

	struct Options
	{
		static void setPatternsPath(const string& path);
		static string getPatternsPath();

		static void setBrushesPath(const string& path);
		static string getBrushesPath();
	};

protected:
	virtual void loadStandardBrushes() = 0;
	virtual unsigned loadBrush(string fileName, Stroke::MediumType = Stroke::OPAQUE_MEDIUM) = 0;

	typedef std::pair<string, Stroke::MediumType> BrushTexture;
	struct cmpBrushTexture
	{
		bool operator()(const BrushTexture& bt1, const BrushTexture& bt2) const
		{
			int r = strcmp(bt1.first.c_str(), bt2.first.c_str());
			if (r != 0)
				return (r < 0);
			else
				return (bt1.second < bt2.second);
		}
	};
	typedef std::map<BrushTexture, unsigned, cmpBrushTexture> brushesMap;

	static TextureManager *_pInstance;
	bool _hasLoadedTextures;
	brushesMap _brushesMap;
	static string _patterns_path;
	static string _brushes_path;
	unsigned int _defaultTextureId;
	
#ifdef WITH_CXX_GUARDEDALLOC
	MEM_CXX_CLASS_ALLOC_FUNCS("Freestyle:TextureManager")
#endif
};


/**********************************/
/*                                */
/*                                */
/*         StrokeRenderer         */
/*                                */
/*                                */
/**********************************/

/*! Class to render a stroke. Creates a triangle strip and stores it strip is lazily created at the first rendering */
class StrokeRenderer
{
public:
	StrokeRenderer();
	virtual ~StrokeRenderer();

	/*! Renders a stroke rep */
	virtual void RenderStrokeRep(StrokeRep *iStrokeRep) const = 0;
	virtual void RenderStrokeRepBasic(StrokeRep *iStrokeRep) const = 0;

	// initializes the texture manager
	// lazy, checks if it has already been done
	static bool loadTextures();

	//static unsigned int getTextureIndex(unsigned int index);
	static TextureManager *_textureManager;

#ifdef WITH_CXX_GUARDEDALLOC
	MEM_CXX_CLASS_ALLOC_FUNCS("Freestyle:StrokeRenderer")
#endif
};

} /* namespace Freestyle */

#endif // __FREESTYLE_STROKE_RENDERER_H__
