File indexing completed on 2024-12-22 04:31:08

 /*************************************************************************
  * Copyright (C) 2014 by Hugo Pereira Da Costa <hugo.pereira@free.fr>    *
  *                                                                       *
  * This program is free software; you can redistribute it and/or modify  *
  * it under the terms of the GNU General Public License as published by  *
  * the Free Software Foundation; either version 2 of the License, or     *
  * (at your option) any later version.                                   *
  *                                                                       *
  * This program 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 this program; if not, write to the                         *
  * Free Software Foundation, Inc.,                                       *
  * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA .        *
  *************************************************************************/
 
 #include "tileset.h"
 
 #include <QPainter>
 
 //___________________________________________________________
 inline bool bits(TileSet::Tiles flags, TileSet::Tiles testFlags)
 { return (flags & testFlags) == testFlags; }
 
 //______________________________________________________________________________________
 inline qreal devicePixelRatio( const QPixmap& pixmap )
 {
     return pixmap.devicePixelRatio();
 }
 
 //______________________________________________________________________________________
 inline void setDevicePixelRatio( QPixmap& pixmap, qreal value )
 {
     return pixmap.setDevicePixelRatio( value );
 }
 
 //______________________________________________________________
 void TileSet::initPixmap( PixmapList& pixmaps, const QPixmap &source, int width, int height, const QRect &rect)
 {
     QSize size( width, height );
     if( !( size.isValid() && rect.isValid() ) )
     {
         pixmaps.append( QPixmap() );
 
     } else if( size != rect.size() ) {
 
         const qreal dpiRatio( devicePixelRatio( source ) );
         const QRect scaledRect( rect.topLeft()*dpiRatio, rect.size()*dpiRatio );
         const QSize scaledSize( size*dpiRatio );
         const QPixmap tile( source.copy(scaledRect) );
         QPixmap pixmap( scaledSize );
 
         pixmap.fill(Qt::transparent);
         QPainter painter(&pixmap);
         painter.drawTiledPixmap(0, 0, scaledSize.width(), scaledSize.height(), tile);
         setDevicePixelRatio( pixmap, dpiRatio );
         pixmaps.append( pixmap );
 
     } else {
 
         const qreal dpiRatio( devicePixelRatio( source ) );
         const QRect scaledRect( rect.topLeft()*dpiRatio, rect.size()*dpiRatio );
         QPixmap pixmap( source.copy( scaledRect ) );
         setDevicePixelRatio( pixmap, dpiRatio );
         pixmaps.append( pixmap );
 
     }
 
 }
 
 //______________________________________________________________
 TileSet::TileSet():
     _w1(0),
     _h1(0),
     _w3(0),
     _h3(0)
 { _pixmaps.reserve(9); }
 
 //______________________________________________________________
 TileSet::TileSet(const QPixmap &source, int w1, int h1, int w2, int h2 ):
     _w1(w1),
     _h1(h1),
     _w3(0),
     _h3(0)
 {
     _pixmaps.reserve(9);
     if( source.isNull() ) return;
 
     _w3 = source.width()/devicePixelRatio( source ) - (w1 + w2);
     _h3 = source.height()/devicePixelRatio( source ) - (h1 + h2);
     int w = w2;
     int h = h2;
 
     // initialise pixmap array
     initPixmap( _pixmaps, source, _w1, _h1, QRect(0, 0, _w1, _h1) );
     initPixmap( _pixmaps, source, w, _h1, QRect(_w1, 0, w2, _h1) );
     initPixmap( _pixmaps, source, _w3, _h1, QRect(_w1+w2, 0, _w3, _h1) );
     initPixmap( _pixmaps, source, _w1, h, QRect(0, _h1, _w1, h2) );
     initPixmap( _pixmaps, source, w, h, QRect(_w1, _h1, w2, h2) );
     initPixmap( _pixmaps, source, _w3, h, QRect(_w1+w2, _h1, _w3, h2) );
     initPixmap( _pixmaps, source, _w1, _h3, QRect(0, _h1+h2, _w1, _h3) );
     initPixmap( _pixmaps, source, w, _h3, QRect(_w1, _h1+h2, w2, _h3) );
     initPixmap( _pixmaps, source, _w3, _h3, QRect(_w1+w2, _h1+h2, _w3, _h3) );
 }
 
 //___________________________________________________________
 void TileSet::render(const QRect &constRect, QPainter *painter, Tiles tiles) const
 {
 
     const bool oldHint( painter->testRenderHint( QPainter::SmoothPixmapTransform ) );
     painter->setRenderHint( QPainter::SmoothPixmapTransform, true );
 
     // check initialization
     if( _pixmaps.size() < 9 ) return;
 
     // copy source rect
     QRect rect( constRect );
 
     // get rect dimensions
     int x0, y0, w, h;
     rect.getRect(&x0, &y0, &w, &h);
 
     // calculate pixmaps widths
     int wLeft(0);
     int wRight(0);
     if( _w1+_w3 > 0 )
     {
         qreal wRatio( qreal( _w1 )/qreal( _w1 + _w3 ) );
         wLeft = (tiles&Right) ? qMin( _w1, int(w*wRatio) ):_w1;
         wRight = (tiles&Left) ? qMin( _w3, int(w*(1.0-wRatio)) ):_w3;
     }
 
     // calculate pixmap heights
     int hTop(0);
     int hBottom(0);
     if( _h1+_h3 > 0 )
     {
         qreal hRatio( qreal( _h1 )/qreal( _h1 + _h3 ) );
         hTop = (tiles&Bottom) ? qMin( _h1, int(h*hRatio) ):_h1;
         hBottom = (tiles&Top) ? qMin( _h3, int(h*(1.0-hRatio)) ):_h3;
     }
 
     // calculate corner locations
     w -= wLeft + wRight;
     h -= hTop + hBottom;
     const int x1 = x0 + wLeft;
     const int x2 = x1 + w;
     const int y1 = y0 + hTop;
     const int y2 = y1 + h;
 
     const int w2 = _pixmaps.at(7).width()/devicePixelRatio( _pixmaps.at(7) );
     const int h2 = _pixmaps.at(5).height()/devicePixelRatio( _pixmaps.at(5) );
 
     // corner
     if( bits( tiles, Top|Left) )  painter->drawPixmap(x0, y0, _pixmaps.at(0), 0, 0, wLeft*devicePixelRatio( _pixmaps.at(0) ), hTop*devicePixelRatio( _pixmaps.at(0) ));
     if( bits( tiles, Top|Right) ) painter->drawPixmap(x2, y0, _pixmaps.at(2), (_w3-wRight)*devicePixelRatio( _pixmaps.at(2) ), 0, wRight*devicePixelRatio( _pixmaps.at(2) ), hTop*devicePixelRatio( _pixmaps.at(2) ) );
     if( bits( tiles, Bottom|Left) )  painter->drawPixmap(x0, y2, _pixmaps.at(6), 0, (_h3-hBottom)*devicePixelRatio( _pixmaps.at(6) ), wLeft*devicePixelRatio( _pixmaps.at(6) ),  hBottom*devicePixelRatio( _pixmaps.at(6) ));
     if( bits( tiles, Bottom|Right) ) painter->drawPixmap(x2, y2, _pixmaps.at(8), (_w3-wRight)*devicePixelRatio( _pixmaps.at(8) ), (_h3-hBottom)*devicePixelRatio( _pixmaps.at(8) ), wRight*devicePixelRatio( _pixmaps.at(8) ), hBottom*devicePixelRatio( _pixmaps.at(8) ) );
 
     // top and bottom
     if( w > 0 )
     {
         if( tiles&Top ) painter->drawPixmap(x1, y0, w, hTop, _pixmaps.at(1), 0, 0, w2*devicePixelRatio( _pixmaps.at(1) ), hTop*devicePixelRatio( _pixmaps.at(1) ) );
         if( tiles&Bottom ) painter->drawPixmap(x1, y2, w, hBottom, _pixmaps.at(7), 0, (_h3-hBottom)*devicePixelRatio( _pixmaps.at(7) ), w2*devicePixelRatio( _pixmaps.at(7) ), hBottom*devicePixelRatio( _pixmaps.at(7) ) );
     }
 
     // left and right
     if( h > 0 )
     {
         if( tiles&Left ) painter->drawPixmap(x0, y1, wLeft, h, _pixmaps.at(3), 0, 0, wLeft*devicePixelRatio( _pixmaps.at(3) ), h2*devicePixelRatio( _pixmaps.at(3) ) );
         if( tiles&Right ) painter->drawPixmap(x2, y1, wRight, h, _pixmaps.at(5), (_w3-wRight)*devicePixelRatio( _pixmaps.at(5) ), 0, wRight*devicePixelRatio( _pixmaps.at(5) ), h2*devicePixelRatio( _pixmaps.at(5) ) );
     }
 
     // center
     if( (tiles&Center) && h > 0 && w > 0 ) painter->drawPixmap(x1, y1, w, h, _pixmaps.at(4));
 
     // restore
     painter->setRenderHint( QPainter::SmoothPixmapTransform, oldHint );
 
 }