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blitter.h

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00001 /*
00002 Copyright (c) 2002 Xavier Trochu
00003 
00004 This software is provided 'as-is', without any express or implied warranty. In no event
00005 will the authors be held liable for any damages arising from the use of this software.
00006 
00007 Permission is granted to anyone to use this software for any purpose, including commercial
00008 applications, and to alter it and redistribute it freely, subject to the following
00009 restrictions:
00010 
00011 1. The origin of this software must not be misrepresented; you must not claim that you
00012    wrote the original software. If you use this software in a product, an acknowledgment
00013    in the product documentation would be appreciated but is not required.
00014 
00015 2. Altered source versions must be plainly marked as such, and must not be misrepresented 
00016    as being the original software.
00017 
00018 3. This notice may not be removed or altered from any source distribution.
00019 */
00020 #ifndef __BLITTER_H_
00021 #define __BLITTER_H_
00022 
00023 #ifdef HAVE_CONFIG_H
00024 #include "config.h"
00025 #endif
00026 
00027 #ifdef DEBUG
00028 # ifndef NO_DEBUG_CLIPPER
00029 #  define DEBUG_CLIPPER
00030 # endif
00031 #else
00032 # ifdef DEBUG_CLIPPER
00033 #  error DEBUG_CLIPPER defined without DEBUG
00034 # endif
00035 #endif
00036 
00037 #include <exception>
00038 #include "rect.h"
00039 
00040 class chunck;
00046 class blitter {
00047 private:
00048     char * _ptr;    
00049     char * _offset; 
00050     point _clip;        
00051     rect _src;      
00052     point _cur;         
00053     bool _outside;  
00054 #ifdef DEBUG_CLIPPER
00055     int _clipped;
00056     int _clipped_block;
00057 #endif
00058 public:
00065     blitter(char * buffer, const point & dstsize, const rect & src) throw();
00066     virtual ~blitter();
00067     void blit(char *, unsigned int) throw(std::exception); 
00068     void blit(chunck &, unsigned int) throw(std::exception); 
00069     void put(char) throw(std::exception); 
00070     void put(char, unsigned int) throw(std::exception); 
00071     void advance(int = 1, int = 0) throw(); 
00072     void advance_block(int = 1, int = 0) throw(); 
00073     void put_block(unsigned int) throw(std::exception); 
00074     void put_block(chunck &) throw(std::exception); 
00075     void put_block(unsigned char *) throw(std::exception); 
00076     void put_block(unsigned int, unsigned int, unsigned int, unsigned int) throw(std::exception); 
00077     void block_copy(int); 
00078 };
00079 
00080 #endif

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