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106 lines
3.0 KiB
C++
106 lines
3.0 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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/*
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* This code is based on Labyrinth of Time code with assistance of
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*
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* Copyright (c) 1993 Terra Nova Development
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* Copyright (c) 2004 The Wyrmkeep Entertainment Co.
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*
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*/
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#ifndef LAB_UTILS_H
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#define LAB_UTILS_H
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namespace Lab {
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class Utils {
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private:
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LabEngine *_vm;
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uint16 _dataBytesPerRow;
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/**
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* Undiffs a piece of memory based on the header size.
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*/
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template<typename T>
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void unDiff(T *dest, Common::File *sourceFile);
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/**
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* Undiffs a piece of memory when header size is a byte, and copy/skip size
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* is a byte or a word or a double word.
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*/
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template<typename T>
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void verticalUnDiff(T *dest, Common::File *sourceFile, uint16 bytesPerRow);
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public:
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Utils(LabEngine *vm);
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Common::RandomSource _rnd;
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/**
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* Scales the x co-ordinates to that of the new display. In the room parser
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* file, co-ordinates are set up on a 360x336 display.
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*/
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uint16 scaleX(uint16 x);
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/**
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* Scales the y co-ordinates to that of the new display. In the room parser
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* file, co-ordinates are set up on a 368x336 display.
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*/
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uint16 scaleY(uint16 y);
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Common::Rect rectScale(int16 x1, int16 y1, int16 x2, int16 y2);
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/**
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* Scales the VGA x coords to SVGA if necessary; otherwise, returns VGA coords.
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*/
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int16 vgaScaleX(int16 x);
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/**
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* Scales the VGA y coords to SVGA if necessary; otherwise, returns VGA coords.
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*/
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int16 vgaScaleY(int16 y);
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Common::Rect vgaRectScale(int16 x1, int16 y1, int16 x2, int16 y2);
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uint16 svgaCord(uint16 cord);
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uint16 mapScaleX(uint16 x);
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uint16 mapScaleY(uint16 y);
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Common::Rect mapRectScale(int16 x1, int16 y1, int16 x2, int16 y2);
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/**
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* Converts SVGA coords to VGA if necessary, otherwise returns VGA coords.
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*/
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Common::Point vgaUnscale(Common::Point pos);
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/**
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* Does the undiffing between the bitmaps.
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*/
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void unDiff(byte *newBuf, byte *oldBuf, Common::File *sourceFile, uint16 bytesPerRow, bool isVertical);
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void runLengthDecode(byte *dest, Common::File *sourceFile);
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void verticalRunLengthDecode(byte *dest, Common::File *sourceFile, uint16 bytesPerRow);
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void setBytesPerRow(int num);
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uint16 getRandom(uint16 max);
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};
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} // End of namespace Lab
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#endif // LAB_UTILS_H
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