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84 lines
3.2 KiB
C++
84 lines
3.2 KiB
C++
/* ScummVM - Scumm int32erpreter
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* Copyright (C) 2001/2002 The ScummVM project
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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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* 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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* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* $Header$
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*
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*/
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#ifndef BLITTER_H
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#define BLITTER_H
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#include "config.h"
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#ifdef DEBUG
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# ifndef NO_DEBUG_CLIPPER
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# define DEBUG_CLIPPER
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# endif
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#else
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# ifdef DEBUG_CLIPPER
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# error DEBUG_CLIPPER defined without DEBUG
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# endif
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#endif
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#include "common/rect.h"
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using ScummVM::Point;
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using ScummVM::Rect;
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class Chunk;
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/*! @brief class for handling blitting on a frame buffer
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This class allows to perform secure blitting to a frame buffer in several ways.
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This means that clipping is performed, so that only the part that you want to modify can be modified.
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*/
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class Blitter {
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private:
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byte * _ptr; //!< This is the pointer to the start of the frame buffer
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byte * _offset; //!< This is the current pointer in the frame buffer
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Point _clip; //!< This is the size of the frame buffer (width/height)
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Rect _src; //!< This is the size and position of the destination rectangle
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Point _cur; //!< This is the current position in the destination rectangle
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bool _outside; //!< flag that is set to \c true when the blitter reach the end of the destination rectangle
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#ifdef DEBUG_CLIPPER
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int32 _clipped;
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int32 _clippedBlock;
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#endif
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public:
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/*! @brief constructor
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@param buffer the frame buffer to blit to
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@param dstsize the size of the frame buffer
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@param src the rectangle to blit to
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*/
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Blitter(byte * buffer, const Point & dstsize, const Rect & src);
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virtual ~Blitter();
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void blit(byte *, uint32); //!< This method allows to blit directly some data from a buffer
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void blit(Chunk &, uint32); //!< This method allows to blit directly some data from a Chunk
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void put(byte); //!< This method allows to blit one byte
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void put(byte, uint32); //!< This method allows to blit one byte several times
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void advance(int32 = 1, int32 = 0); //!< This method allows to advance the current position in the blitter
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void advanceBlock(int32 = 1, int32 = 0); //!< This method allows to advance the current position in the blitter in terms of blocks
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void putBlock(uint32); //!< This method allows to blit one block from an int32 value repeated 4 time
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void putBlock(Chunk &); //!< This method allows to blit one block directly read from a Chunk
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void putBlock(byte *); //!< This method allows to blit one block directly from a buffer
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void putBlock(uint32, uint32, uint32, uint32); //!< This method allows to blit one block from a 4 int32 value
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void blockCopy(int32); //!< This method allows to copy one block from another separated by the given offset
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byte * getPtr() { return _ptr; }
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};
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#endif
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