79 lines
3.2 KiB
C++
79 lines
3.2 KiB
C++
/* 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 Chunk;
|
|
/*! @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(Chunk &, unsigned int); //!< This method allows to blit directly some data from a Chunk
|
|
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(Chunk &); //!< This method allows to blit one block directly read from a Chunk
|
|
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
|