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86 lines
2.8 KiB
86 lines
2.8 KiB
/**
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* \file canvas_imp.h
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*
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* \brief ein Prototyp einer Canvas Implementation
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*
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* Die Canvas Implementation dient Hauptsächlich dazu color,
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* light und fogtables passend zum canvas zur verfügung zu stellen.
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* Es werden auch Methoden bereit gestellt, über die man externe
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* Farbdefinitionen (z.B. für jeweils rot, grün und blau
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* Werte zwischen 0 und 255) in das von dem canvas benutzte Farbschema
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* zu convertieren.
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*
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* \author Georg Steffers <georg@steffers.org> [gs]
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*
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* \date 04.12.2003
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*
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* \version ..2002 [gs]: erste funktionierende Implementation
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* \version 22.12.2003 [gs]: <ul><li>
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* beginn der Dokumentation via doxygen
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* </li><li>
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* Light und Fogtables hinzugefügt
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* </li></ul>
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*/
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/*
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* Copyright (C)2003 Georg Steffers
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __canvas_imp_h__
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#define __canvas_imp_h__
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#define MAX_LIGHT_LEVELS 255
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#define NUM_LIGHT_LEVELS (MAX_LIGHT_LEVELS+1)
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#define MAX_FOG_LEVELS 255
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#define NUM_FOG_LEVELS (MAX_FOG_LEVELS + 1)
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class canvas;
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class rasterizer;
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class canvas_imp {
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friend class canvas;
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friend class rasterizer;
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protected:
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unsigned ext_max_red;
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unsigned ext_max_green;
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unsigned ext_max_blue;
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virtual void compute_light_table(void)=0;
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virtual void compute_fog_table(void)=0;
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public:
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virtual unsigned long ext_to_native(unsigned red,
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unsigned green,
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unsigned blue)=0;
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virtual ~canvas_imp() {};
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// virtual void light_to_native(unsigned char* pcolor,
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// int intensity)=0;
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// virtual void fog_to_native(unsigned char* pcolor,
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// int intensity)=0;
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virtual void set_color(unsigned long col) {};
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virtual void light_native(unsigned long* col, unsigned intense) = 0;
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unsigned char* p_screenbuf;
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char bytes_per_pixel;
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};
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#endif // __canvas_imp_h__
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