/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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.
 *
 */

#ifndef AGI_PICTURE_H
#define AGI_PICTURE_H

namespace Agi {

#define _DEFAULT_WIDTH      160
#define _DEFAULT_HEIGHT     168

/**
 * AGI picture resource.
 */
struct AgiPicture {
	uint32 flen;            /**< size of raw data */
	uint8 *rdata;           /**< raw vector image data */

	void reset() {
		flen = 0;
		rdata = nullptr;
	}

	AgiPicture() { reset(); }
};

// AGI picture version
enum AgiPictureVersion {
	AGIPIC_C64,
	AGIPIC_V1,
	AGIPIC_V15,
	AGIPIC_V2,
	AGIPIC_256
};

enum AgiPictureFlags {
	kPicFNone      = (1 << 0),
	kPicFCircle    = (1 << 1),
	kPicFStep      = (1 << 2),
	kPicFf3Stop    = (1 << 3),
	kPicFf3Cont    = (1 << 4),
	kPicFTrollMode = (1 << 5)
};

class AgiBase;
class GfxMgr;

class PictureMgr {
	AgiBase *_vm;
	GfxMgr *_gfx;

public:
	PictureMgr(AgiBase *agi, GfxMgr *gfx);

	int16 getResourceNr() { return _resourceNr; };

private:
	void draw_xCorner(bool skipOtherCoords = false);
	void yCorner(bool skipOtherCoords = false);
	int plotPatternPoint(int x, int y, int bitpos);
	void plotBrush();

	byte getNextByte();
	byte getNextNibble();

public:
	void putVirtPixel(int x, int y);

	int decodePicture(int16 resourceNr, bool clearScreen, bool agi256 = false, int16 pic_width = _DEFAULT_WIDTH, int16 pic_height = _DEFAULT_HEIGHT);
	int decodePicture(byte *data, uint32 length, int clear, int pic_width = _DEFAULT_WIDTH, int pic_height = _DEFAULT_HEIGHT);
	int unloadPicture(int);
	void drawPicture();
private:
	void drawPictureC64();
	void drawPictureV1();
	void drawPictureV15();
	void drawPictureV2();
	void drawPictureAGI256();

	void draw_SetColor();
	void draw_SetPriority();
	void draw_SetNibbleColor();
	void draw_SetNibblePriority();

	void draw_Line(int16 x1, int16 y1, int16 x2, int16 y2);
	void draw_LineShort();
	void draw_LineAbsolute();

	int  draw_FillCheck(int16 x, int16 y);
	void draw_Fill(int16 x, int16 y);
	void draw_Fill();

public:
	void showPic(); // <-- for regular AGI games
	void showPic(int16 x, int16 y, int16 pic_width, int16 pic_height); // <-- for preAGI games
	void showPicWithTransition();
	uint8 *convertV3Pic(uint8 *src, uint32 len);

	void plotPattern(int x, int y);     // public because it's used directly by preagi

	void setPattern(uint8 code, uint8 num);

	void setPictureVersion(AgiPictureVersion version);
	void setPictureData(uint8 *data, int len = 4096);

	void setPictureFlags(int flags) { _flags = flags; }

	void clear();

	void setOffset(int offX, int offY) {
		_xOffset = offX;
		_yOffset = offY;
	}

	void setDimensions(int w, int h) {
		_width = w;
		_height = h;
	}

private:
	int16  _resourceNr;
	uint8 *_data;
	uint32 _dataSize;
	uint32 _dataOffset;
	bool   _dataOffsetNibble;

	uint8 _patCode;
	uint8 _patNum;
	uint8 _priOn;
	uint8 _scrOn;
	uint8 _scrColor;
	uint8 _priColor;

	uint8 _minCommand;

	AgiPictureVersion _pictureVersion;
	int16 _width, _height;
	int16 _xOffset, _yOffset;

	int _flags;
	int _currentStep;
};

} // End of namespace Agi

#endif /* AGI_PICTURE_H */