/* ScummVM - Scumm Interpreter
 * Copyright (C) 2004 Ivan Dubrov
 * Copyright (C) 2004-2006 The ScummVM project
 *
 * 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.
 *
 * $URL$
 * $Id$
 *
 */
#ifndef GOB_DRAW_H
#define GOB_DRAW_H

#include "gob/video.h"
#include "gob/global.h"

namespace Gob {

#define RENDERFLAG_NOINVALIDATE	1
#define RENDERFLAG_CAPTUREPUSH	2
#define RENDERFLAG_CAPTUREPOP	8
#define RENDERFLAG_USEDELTAS 	0x10

class Draw {
public:
	struct FontToSprite {
		int8 sprite;
		int8 base;
		int8 width;
		int8 height;
		FontToSprite() : sprite(0), base(0), width(0), height() {}
	};

	int16 _fontIndex;
	int16 _spriteLeft;
	int16 _spriteTop;
	int16 _spriteRight;
	int16 _spriteBottom;
	int16 _destSpriteX;
	int16 _destSpriteY;
	int16 _backColor;
	int16 _frontColor;
	char _letterToPrint;
	FontToSprite _fontToSprite[4];
	int16 _destSurface;
	int16 _sourceSurface;
	int16 _renderFlags;
	int16 _backDeltaX;
	int16 _backDeltaY;
	Video::FontDesc *_fonts[8];
	char *_textToPrint;
	int16 _transparency;
	Video::SurfaceDesc *_spritesArray[50];

	int16 _invalidatedCount;
	int16 _invalidatedTops[30];
	int16 _invalidatedLefts[30];
	int16 _invalidatedRights[30];
	int16 _invalidatedBottoms[30];

	int8 _noInvalidated;
//	int8 doFullFlip; // Never used?!?
	int8 _paletteCleared;

	int16 _cursorIndex;
	int16 _transparentCursor;
	uint32 _cursorTimeKey;

	Video::SurfaceDesc *_backSurface;
	Video::SurfaceDesc *_frontSurface;

	int16 _unusedPalette1[18];
	int16 _unusedPalette2[16];
	Video::Color _vgaPalette[256];
	Video::Color _vgaSmallPalette[16];

	// 0 (00b): No cursor
	// 1 (01b): Cursor would be on _backSurface
	// 2 (10b): Cursor would be on _frontSurface
	// 3 (11b): Cursor would be on _backSurface and _frontSurface
	uint8 _showCursor;

	int16 _cursorX;
	int16 _cursorY;
	int16 _cursorWidth;
	int16 _cursorHeight;

	int16 _cursorXDeltaVar;
	int16 _cursorYDeltaVar;

	Video::SurfaceDesc *_cursorSprites;
	Video::SurfaceDesc *_cursorSpritesBack;
	Video::SurfaceDesc *_scummvmCursor;

	int16 _cursorAnim;
	int8 _cursorAnimLow[40];
	int8 _cursorAnimHigh[40];
	int8 _cursorAnimDelays[40];
	int8 _applyPal;

	int16 _palLoadData1[4];
	int16 _palLoadData2[4];
		
	int16 _word_2E8E2;
	int16 _word_2FC9C;
	int16 _word_2FC9E;
	int16 _word_2E51F;
	Video::SurfaceDesc *_off_2E51B;
	Video::SurfaceDesc *_off_2E517;

	void invalidateRect(int16 left, int16 top, int16 right, int16 bottom);
	void blitInvalidated(void);
	void setPalette(void);
	void clearPalette(void);

	void freeSprite(int16 index);
	void adjustCoords(char adjust, int16 *coord1, int16 *coord2);
	void drawString(char *str, int16 x, int16 y, int16 color1, int16 color2,
		int16 transp, Video::SurfaceDesc *dest, Video::FontDesc *font);
	void printTextCentered(int16 arg_0, int16 left, int16 top, int16 right,
			int16 bottom, char *str, int16 fontIndex, int16 color);
	int32 getSpriteRectSize(int16 index);
	void initSpriteSurf(int16 index, int16 vidMode, int16 width, int16 height, int16 flags);

	virtual void initBigSprite(int16 index, int16 width, int16 height, int16 flags) = 0;
	virtual void printText(void) = 0;
	virtual void spriteOperation(int16 operation) = 0;
	virtual void blitCursor(void) = 0;
	virtual void animateCursor(int16 cursor) = 0;
	virtual void initScreen(void) = 0;
	virtual void closeScreen(void) = 0;

	Draw(GobEngine *vm);
	virtual ~Draw() {};

protected:
	GobEngine *_vm;
};

class Draw_v1 : public Draw {
public:
	virtual void initBigSprite(int16 index, int16 width, int16 height, int16 flags) {
		_vm->_draw->_spritesArray[index] =
				_vm->_video->initSurfDesc(_vm->_global->_videoMode, width, height, flags);
	}
	virtual void printText(void);
	virtual void spriteOperation(int16 operation);
	virtual void blitCursor(void);
	virtual void animateCursor(int16 cursor);
	virtual void initScreen(void);
	virtual void closeScreen(void);

	Draw_v1(GobEngine *vm);
	virtual ~Draw_v1() {};
};

class Draw_v2 : public Draw_v1 {
public:
	virtual void initBigSprite(int16 index, int16 width, int16 height, int16 flags) {
		// This would init big surfaces in pieces, to avoid breaking page bounds.
		// This isn't necessary anymore, so we don't do it.
		initSpriteSurf(index, _vm->_global->_videoMode, width, height, flags);
		_vm->_video->clearSurf(_spritesArray[index]);
	}
	virtual void printText(void);
	virtual void spriteOperation(int16 operation);
	virtual void blitCursor(void);
	virtual void animateCursor(int16 cursor);
	virtual void initScreen(void);
	virtual void closeScreen(void);

	Draw_v2(GobEngine *vm);
	virtual ~Draw_v2() {};
};

// Draw operations

#define DRAW_BLITSURF	0
#define DRAW_PUTPIXEL	1
#define DRAW_FILLRECT	2
#define DRAW_DRAWLINE	3
#define DRAW_INVALIDATE	4
#define DRAW_LOADSPRITE	5
#define DRAW_PRINTTEXT	6
#define DRAW_DRAWBAR 7
#define DRAW_CLEARRECT	8
#define DRAW_FILLRECTABS 9
#define DRAW_DRAWLETTER	10

}				// End of namespace Gob

#endif	/* __DRAW_H */