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/* 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.
*
*/
/*
* This code is based on Labyrinth of Time code with assistance of
*
* Copyright (c) 1993 Terra Nova Development
* Copyright (c) 2004 The Wyrmkeep Entertainment Co.
*
*/
#ifndef LAB_UTILS_H
#define LAB_UTILS_H
namespace Lab {
class Utils {
private:
LabEngine *_vm;
uint16 _dataBytesPerRow;
/**
* Undiffs a piece of memory based on the header size.
*/
template<typename T>
void unDiff(T *dest, Common::File *sourceFile);
/**
* Undiffs a piece of memory when header size is a byte, and copy/skip size
* is a byte or a word or a double word.
*/
template<typename T>
void verticalUnDiff(T *dest, Common::File *sourceFile, uint16 bytesPerRow);
public:
Utils(LabEngine *vm);
Common::RandomSource _rnd;
/**
* Scales the x co-ordinates to that of the new display. In the room parser
* file, co-ordinates are set up on a 360x336 display.
*/
uint16 scaleX(uint16 x);
/**
* Scales the y co-ordinates to that of the new display. In the room parser
* file, co-ordinates are set up on a 368x336 display.
*/
uint16 scaleY(uint16 y);
Common::Rect rectScale(int16 x1, int16 y1, int16 x2, int16 y2);
/**
* Scales the VGA x coords to SVGA if necessary; otherwise, returns VGA coords.
*/
int16 vgaScaleX(int16 x);
/**
* Scales the VGA y coords to SVGA if necessary; otherwise, returns VGA coords.
*/
int16 vgaScaleY(int16 y);
Common::Rect vgaRectScale(int16 x1, int16 y1, int16 x2, int16 y2);
uint16 svgaCord(uint16 cord);
uint16 mapScaleX(uint16 x);
uint16 mapScaleY(uint16 y);
Common::Rect mapRectScale(int16 x1, int16 y1, int16 x2, int16 y2);
/**
* Converts SVGA coords to VGA if necessary, otherwise returns VGA coords.
*/
Common::Point vgaUnscale(Common::Point pos);
/**
* Does the undiffing between the bitmaps.
*/
void unDiff(byte *newBuf, byte *oldBuf, Common::File *sourceFile, uint16 bytesPerRow, bool isVertical);
void runLengthDecode(byte *dest, Common::File *sourceFile);
void verticalRunLengthDecode(byte *dest, Common::File *sourceFile, uint16 bytesPerRow);
void setBytesPerRow(int num);
uint16 getRandom(uint16 max);
};
} // End of namespace Lab
#endif // LAB_UTILS_H
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