rpolygon.h

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/*
    Copyright 2005-2010 Intel Corporation.  All Rights Reserved.

    This file is part of Threading Building Blocks.

    Threading Building Blocks is free software; you can redistribute it
    and/or modify it under the terms of the GNU General Public License
    version 2 as published by the Free Software Foundation.

    Threading Building Blocks 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 Threading Building Blocks; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    As a special exception, you may use this file as part of a free software
    library without restriction.  Specifically, if other files instantiate
    templates or use macros or inline functions from this file, or you compile
    this file and link it with other files to produce an executable, this
    file does not by itself cause the resulting executable to be covered by
    the GNU General Public License.  This exception does not however
    invalidate any other reasons why the executable file might be covered by
    the GNU General Public License.
*/

// rpolygon.h
//
#ifndef _RPOLYGON_H_
#define _RPOLYGON_H_
#include <vector>
#include <iostream>
#include "pover_video.h"

#include "tbb/scalable_allocator.h"

using namespace std;

using namespace tbb;

class RPolygon;
typedef scalable_allocator<RPolygon> RPolygon_allocator;
DEFINE RPolygon_allocator rAlloc;

enum MallocBehavior {
    UseMalloc,
    UseScalableAllocator
};

DEFINE MallocBehavior gMBehavior INIT(UseScalableAllocator);

class RPolygon {
public:
    RPolygon() {m_XMin = m_YMin = m_XMax = m_YMax = 0;
        m_r = m_g = m_b = 0;
    }
    RPolygon(int xMin, int yMin, int xMax, int yMax, int r=-1, int g=-1, int b=-1) : m_XMin(xMin), m_YMin(yMin), m_XMax(xMax), m_YMax(yMax) {
        if( r >= 0) {
            m_r=(colorcomp_t)r; m_g=(colorcomp_t)g; m_b=(colorcomp_t)b;
                        if(gDoDraw) drawPoly();
        }
    }

    static RPolygon *alloc_RPolygon(int xMin, int yMin, int xMax, int yMax, int r=-1, int g=-1, int b=-1) {
        switch(gMBehavior) {
            case UseScalableAllocator: {
                RPolygon *my_p = rAlloc.allocate(1);
                my_p->set_nodraw(xMin,yMin,xMax,yMax);
                my_p->setColor(r,g,b);
                if( r >= 0 && gDoDraw) {
                    my_p->drawPoly();
                }
                return my_p;
            }
            case UseMalloc: {
                RPolygon *my_p = new RPolygon(xMin,yMin,xMax,yMax,r,g,b);
                return my_p;
            }
        }
        return NULL;
    }

    static void free_RPolygon(RPolygon *p) { 
        switch(gMBehavior) {
            case UseScalableAllocator: {
                rAlloc.deallocate(p, 1);
                break;
            }
            case UseMalloc: {
                delete p;
                break;
            }
        }
    }

    void set_nodraw(int xMin, int yMin, int xMax, int yMax) {m_XMin=xMin; m_YMin=yMin; m_XMax=xMax; m_YMax=yMax;}

    RPolygon &intersect(RPolygon &otherPoly);
    void set(int xMin, int yMin, int xMax, int yMax) {
         set_nodraw(xMin,yMin,xMax,yMax);
         if(gDoDraw) {
            drawPoly();
         }
    }
    void get(int *xMin, int *yMin, int *xMax, int *yMax) const {*xMin=m_XMin;*yMin=m_YMin;*xMax=m_XMax;*yMax=m_YMax;}
    void setColor(colorcomp_t newr, colorcomp_t newg, colorcomp_t newb) {m_r = newr; m_g=newg; m_b=newb;}
    void getColor(int *myr, int *myg, int *myb) {*myr=m_r; *myg=m_g; *myb=m_b;}
    color_t myColor() {return gVideo->get_color(m_r, m_g, m_b);}
    void drawPoly() {
        if(gVideo->running) {
            if(g_next_frame()) {    // Shouldn't call next_frame each time
                drawing_area ldrawing(
                    gDrawXOffset+m_XMin*gPolyXBoxSize,         //x
                    gDrawYOffset+m_YMin*gPolyYBoxSize,         //y
                    (m_XMax-m_XMin+1)*gPolyXBoxSize,           //sizex
                    (m_YMax-m_YMin+1)*gPolyYBoxSize);          //sizey
                for(int y=0; y<ldrawing.size_y; y++) {
                    ldrawing.set_pos(0,y);
                    color_t my_color = myColor();
                    for(int x=0;x < ldrawing.size_x; x++) {
                         ldrawing.put_pixel(my_color);
                    }
                }
            }
        }
    }
    int  area() {return ((m_XMax-m_XMin+1)*(m_YMax-m_YMin+1));}
    void print(int i) { cout << "RPolygon " << i << " (" << m_XMin << ", " << m_YMin << ")-(" << m_XMax << ", " << m_YMax << ") " << endl; fflush(stdout);}
private:
    int m_XMin;
    int m_YMin;
    int m_XMax;
    int m_YMax;
    colorcomp_t m_r;
    colorcomp_t m_g;
    colorcomp_t m_b;
};

extern ostream& operator<<(ostream& s, const RPolygon &p);

class RPolygon_flagged {
    RPolygon *myPoly;
    bool is_duplicate;
public:
    RPolygon_flagged() {myPoly = NULL; is_duplicate = false;}
    bool isDuplicate() {return is_duplicate;}
    void setDuplicate(bool newValue) {is_duplicate = newValue;}
    RPolygon *p() {return myPoly;}
    void setp(RPolygon *newp) {myPoly = newp;}
};

typedef class vector<RPolygon *> Polygon_map_t;
typedef class vector<RPolygon_flagged> Flagged_map_t; // we'll make shallow copies

inline bool PolygonsOverlap(RPolygon *p1, RPolygon *p2, int &xl, int &yl, int &xh, int &yh) {
    int xl1, yl1, xh1, yh1, xl2, yl2, xh2, yh2;
#if _DEBUG
     rt_sleep(1);   // slow down the process so we can see it.
#endif
    p1->get(&xl1, &yl1, &xh1, &yh1);
    p2->get(&xl2, &yl2, &xh2, &yh2);
    if(xl1 > xh2) return false;
    if(xh1 < xl2) return false;
    if(yl1 > yh2) return false;
    if(yh1 < yl2) return false;
    xl = (xl1 < xl2) ? xl2 : xl1;
    xh = (xh1 < xh2) ? xh1 : xh2;
    yl = (yl1 < yl2) ? yl2 : yl1;
    yh = (yh1 < yh2) ? yh1 : yh2;
    return true;
}

#endif // _RPOLYGON_H_