/* Copyright (C) 2009 Wildfire Games.
 * This file is part of 0 A.D.
 *
 * 0 A.D. 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.
 *
 * 0 A.D. 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 0 A.D.  If not, see <http://www.gnu.org/licenses/>.
 */

/*
 * RenderModifier for player color rendering, to be used with e.g.
 * FixedFunctionModelRenderer
 */

#ifndef INCLUDED_PLAYERRENDERER
#define INCLUDED_PLAYERRENDERER

#include "RenderModifiers.h"


/**
 * Class FastPlayerColorRender: Render models fully textured and lit
 * plus player color in a single pass using multi-texturing (at least 3 TMUs
 * required).
 */
class FastPlayerColorRender : public RenderModifier
{
public:
	FastPlayerColorRender();
	~FastPlayerColorRender();

	// Implementation
	int BeginPass(int pass);
	bool EndPass(int pass);
	void PrepareTexture(int pass, CTexturePtr& texture);
	void PrepareModel(int pass, CModel* model);

	/**
	 * IsAvailable: Determines whether this RenderModifier can be used
	 * given the OpenGL implementation specific limits.
	 *
	 * @note Do not attempt to construct a FastPlayerColorRender object
	 * when IsAvailable returns false.
	 *
	 * @return true if the OpenGL implementation can support this
	 * RenderModifier.
	 */
	static bool IsAvailable();
};


/**
 * Class SlowPlayerColorRender: Render models fully textured and lit
 * plus player color using multi-pass.
 *
 * It has the same visual result as FastPlayerColorRender (except for
 * potential precision issues due to the multi-passing).
 */
class SlowPlayerColorRender : public RenderModifier
{
public:
	SlowPlayerColorRender();
	~SlowPlayerColorRender();

	// Implementation
	int BeginPass(int pass);
	bool EndPass(int pass);
	void PrepareTexture(int pass, CTexturePtr& texture);
	void PrepareModel(int pass, CModel* model);
};


/**
 * Render all models using their player color without lighting.
 */
class SolidPlayerColorRender : public RenderModifier
{
public:
	SolidPlayerColorRender();
	~SolidPlayerColorRender();

	// Implementation
	int BeginPass(int pass);
	bool EndPass(int pass);
	void PrepareTexture(int pass, CTexturePtr& texture);
	void PrepareModel(int pass, CModel* model);
};


#endif