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/* ScummVM - Scumm Interpreter
* Copyright (C) 2001/2002 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*
*/
#ifndef __BLITTER_H_
#define __BLITTER_H_
#include "config.h"
#ifdef DEBUG
# ifndef NO_DEBUG_CLIPPER
# define DEBUG_CLIPPER
# endif
#else
# ifdef DEBUG_CLIPPER
# error DEBUG_CLIPPER defined without DEBUG
# endif
#endif
#include "rect.h"
class Chunck;
/*! @brief class for handling blitting on a frame buffer
This class allows to perform secure blitting to a frame buffer in several ways.
This means that clipping is performed, so that only the part that you want to modify can be modified.
*/
class Blitter {
private:
char * _ptr; //!< This is the pointer to the start of the frame buffer
char * _offset; //!< This is the current pointer in the frame buffer
Point _clip; //!< This is the size of the frame buffer (width/height)
Rect _src; //!< This is the size and position of the destination rectangle
Point _cur; //!< This is the current position in the destination rectangle
bool _outside; //!< flag that is set to \c true when the blitter reach the end of the destination rectangle
#ifdef DEBUG_CLIPPER
int _clipped;
int _clippedBlock;
#endif
public:
/*! @brief constructor
@param buffer the frame buffer to blit to
@param dstsize the size of the frame buffer
@param src the rectangle to blit to
*/
Blitter(char * buffer, const Point & dstsize, const Rect & src);
virtual ~Blitter();
void blit(char *, unsigned int); //!< This method allows to blit directly some data from a buffer
void blit(Chunck &, unsigned int); //!< This method allows to blit directly some data from a chunck
void put(char); //!< This method allows to blit one byte
void put(char, unsigned int); //!< This method allows to blit one byte several times
void advance(int = 1, int = 0); //!< This method allows to advance the current position in the blitter
void advanceBlock(int = 1, int = 0); //!< This method allows to advance the current position in the blitter in terms of blocks
void putBlock(unsigned int); //!< This method allows to blit one block from an int value repeated 4 time
void putBlock(Chunck &); //!< This method allows to blit one block directly read from a chunck
void putBlock(unsigned char *); //!< This method allows to blit one block directly from a buffer
void putBlock(unsigned int, unsigned int, unsigned int, unsigned int); //!< This method allows to blit one block from a 4 int value
void blockCopy(int); //!< This method allows to copy one block from another separated by the given offset
};
#endif
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