/*
** decallib.h
**
**---------------------------------------------------------------------------
** Copyright 1998-2005 Randy Heit
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
**
** 1. Redistributions of source code must retain the above copyright
**    notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
**    notice, this list of conditions and the following disclaimer in the
**    documentation and/or other materials provided with the distribution.
** 3. The name of the author may not be used to endorse or promote products
**    derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**---------------------------------------------------------------------------
**
*/

#ifndef __DECALLIB_H__
#define __DECALLIB_H__

#include <string.h>

#include "doomtype.h"
#include "tarray.h"

class AActor;
class FDecal;
struct FDecalAnimator;
struct TypeInfo;

class FDecalBase
{
	friend class FDecalLib;
public:
	virtual const FDecal *GetDecal () const;
	
protected:
	FDecalBase ();
	virtual ~FDecalBase ();

	FDecalBase *Left, *Right;
	char *Name;
	BYTE SpawnID;
	TArray<const TypeInfo *> Users;	// Which actors generate this decal
};

class FDecal : public FDecalBase
{
	friend class FDecalLib;
public:
	FDecal () : Translation (0) {}

	void ApplyToActor (AActor *actor) const;
	const FDecal *GetDecal () const;

	DWORD ShadeColor;
	WORD Translation;
	BYTE ScaleX, ScaleY;
	BYTE RenderStyle;
	WORD PicNum;
	WORD RenderFlags;
	WORD Alpha;				// same as (actor->alpha >> 1)
	const FDecalAnimator *Animator;
	const FDecalBase *LowerDecal;

	enum { DECAL_RandomFlipX = 0x100, DECAL_RandomFlipY = 0x200 };
};

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

	void Clear ();
	void ReadDecals ();		// SC_Open() should have just been called
	void ReadAllDecals ();

	const FDecal *GetDecalByNum (byte num) const;
	const FDecal *GetDecalByName (const char *name) const;

private:
	struct FTranslation;

	static void DelTree (FDecalBase *root);
	static FDecalBase *ScanTreeForNum (const BYTE num, FDecalBase *root);
	static FDecalBase *ScanTreeForName (const char *name, FDecalBase *root);
	FTranslation *GenerateTranslation (DWORD start, DWORD end);
	void AddDecal (const char *name, byte num, const FDecal &decal);
	void AddDecal (FDecalBase *decal);
	FDecalAnimator *FindAnimator (const char *name);

	BYTE GetDecalID ();
	void ParseDecal ();
	void ParseDecalGroup ();
	void ParseGenerator ();
	void ParseFader ();
	void ParseStretcher ();
	void ParseSlider ();
	void ParseCombiner ();
	void ParseColorchanger ();

	FDecalBase *Root;
	FTranslation *Translations;
};

extern FDecalLib DecalLibrary;

#endif //__DECALLIB_H__