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painter.h

00001 /*
00002   libwftk - Worldforge Toolkit - a widget library
00003   Copyright (C) 2002 Malcolm Walker <malcolm@worldforge.org>
00004   Based on code copyright  (C) 1999-2002  Karsten Laux
00005 
00006   This library is free software; you can redistribute it and/or
00007   modify it under the terms of the GNU Lesser General Public
00008   License as published by the Free Software Foundation; either
00009   version 2.1 of the License, or (at your option) any later version.
00010   
00011   This library is distributed in the hope that it will be useful,
00012   but WITHOUT ANY WARRANTY; without even the implied warranty of
00013   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014   Lesser General Public License for more details.
00015   
00016   You should have received a copy of the GNU Lesser General Public
00017   License along with this library; if not, write to the
00018   Free Software Foundation, Inc., 59 Temple Place - Suite 330,
00019   Boston, MA  02111-1307, SA.
00020 */
00021 // written by Karsten Laux, June 1999  
00022 
00023 #ifndef _PAINTER_H_
00024 #define _PAINTER_H_
00025 
00026 #include <wftk/surface.h>
00027 
00028 namespace wftk {
00029 
00031 class Painter
00032 {
00033  public:
00035   Painter(Surface* surf = 0);
00036 
00037   bool empty() const {return !surface_ || surface_->empty();}
00038 
00040   enum Mode {OP_REPLACE , OP_AND , OP_OR , OP_XOR };
00041 
00043   void setColor(const Color& col) { color_ = col; };
00045   void setFilling(bool flag) { fill_ = flag;};
00047   void setMode(Mode mode) { mode_ = mode;};
00048 
00050   void setSurface(Surface* surf) {surface_ = surf;}
00051 
00057   void setPixel(const Point& pt, const Color& col)
00058     {if(surface_) surface_->setPixel(pt, col);}
00059     
00064   Color getPixel (const Point& pt)
00065     {return surface_ ? surface_->getPixel(pt) : Color();}
00066 
00072   void hLine(const Point& p1, const Point& p2);
00073     
00079   void vLine(const Point& p1, const Point& p2);
00080     
00089   void line(const Point& p1, const Point& p2);
00090     
00097   void hLine(const Point& p1, const Point& p2, const Color& col);
00098     
00105   void vLine(const Point& p1, const Point& p2, const Color& col);
00106   
00116   void line(const Point& p1, const Point& p2, const Color& col);
00117 
00124   void circle(const Point& c, unsigned int r, unsigned int t=1);
00125     
00133   void ellipse(const Point& c, unsigned int rx, 
00134            unsigned int ry, unsigned int t=1);
00135     
00141   void box(const Point& p1, const Point& p2);
00142     
00149   void trigon(const Point& p1, const Point& p2, const Point& p3);
00150 
00158   void trigon(const Point& p1, const Point& p2, const Point& p3, const Color& c);
00159 
00171   void shadedTrigon(const Point& d1, const Point& d2, const Point& d3,
00172             const Color& c1, const Color& c2, const Color& c3);
00173     
00184   void texturedTrigon(const Point& d1, const Point& d2, const Point& d3,
00185               const Point& s1, const Point& s2, const Point& s3, Surface* texture);
00186   
00187  private:
00189   void  ellipseFill(const Point& c, unsigned int rx, unsigned int ry);
00191   void writePixel(Uint32, Uint32);
00192 
00194   Surface* surface_;
00196   Color color_;
00198   bool fill_;
00200   Mode mode_;
00201 
00202 };
00203 
00204 
00205 }
00206 
00207 
00208 
00209 #endif 

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