Added wxImage::FloodFill file
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@14901 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
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Julian Smart
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src/common/imagfill.cpp
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267
src/common/imagfill.cpp
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/////////////////////////////////////////////////////////////////////////////
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// Name: imagfill.cpp
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// Purpose: FloodFill for wxImage
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// Author:
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// RCS-ID: $Id$
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// Copyright:
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifdef __GNUG__
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#endif
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// For compilers that support precompilation, includes "wx.h".
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#include "wx/wxprec.h"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#include "wx/defs.h"
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#if wxUSE_IMAGE
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#include "wx/image.h"
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// DoFloodFill
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// Fills with the colour extracted from fillBrush, starting at x,y until either
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// a color different from the start pixel is reached (wxFLOOD_SURFACE)
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// or fill color is reached (wxFLOOD_BORDER)
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bool wxImage::MatchPixel(int x, int y, int w, int h, const wxColour & c)
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{
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if ((x<0)||(x>=w)||(y<0)||(y>=h)) return false;
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unsigned char r = GetRed(x,y);
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unsigned char g = GetGreen(x,y);
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unsigned char b = GetBlue(x,y);
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return c.Red() == r && c.Green() == g && c.Blue() == b ;
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}
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bool wxImage::MatchBoundaryPixel(int x, int y, int w, int h, const wxColour & fill, const wxColour & bound)
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{
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if ((x<0)||(x>=w)||(y<0)||(y>=h)) return TRUE;
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unsigned char r = GetRed(x,y);
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unsigned char g = GetGreen(x,y);
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unsigned char b = GetBlue(x,y);
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if ( fill.Red() == r && fill.Green() == g && fill.Blue() == b ) return TRUE;
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if ( bound.Red() == r && bound.Green() == g && bound.Blue() == b ) return TRUE;
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return FALSE ;
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}
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void wxImage::DoFloodFill (wxCoord x, wxCoord y, const wxBrush & fillBrush,
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const wxColour& testColour, int style /*=wxFLOOD_SURFACE */,
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int LogicalFunction /*= wxCOPY, currently unused */)
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{
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/* A diamond flood-fill using a circular queue system.
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Each pixel surrounding the current pixel is added to
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the queue if it meets the criteria, then is retrieved in
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its turn. Code originally based on http://www.drawit.co.nz/Developers.htm */
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int width = GetWidth();
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int height = GetHeight();
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//Draw using a pen made from the current brush colour
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//Potentially allows us to use patterned flood fills in future code
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wxColour fillColour = fillBrush.GetColour();
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unsigned char r = fillColour.Red();
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unsigned char g = fillColour.Green();
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unsigned char b = fillColour.Blue();
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//initial test :
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if (style == wxFLOOD_SURFACE)
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{
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//if wxFLOOD_SURFACE, if fill colour is same as required, we don't do anything
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if ( GetRed(x,y) != r
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|| GetGreen(x,y) != g
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|| GetBlue (x,y) != b )
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{
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//prepare memory for queue
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//queue save, start, read
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size_t *qs, *qst, *qr;
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//queue size (physical)
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long qSz= height * width * 2;
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qst = new size_t [qSz];
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//temporary x and y locations
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int xt, yt;
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for (int i=0; i < qSz; i++)
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qst[i] = 0;
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// start queue
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qs=qr=qst;
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*qs=xt=x;
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qs++;
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*qs=yt=y;
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qs++;
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SetRGB(xt,yt,r,g,b);
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//Main queue loop
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while(qr!=qs)
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{
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//Add new members to queue
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//Above current pixel
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if(MatchPixel(xt,yt-1,width,height,testColour))
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{
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*qs=xt;
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qs++;
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*qs=yt-1;
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qs++;
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SetRGB(xt,yt-1,r,g,b);
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//Loop back to beginning of queue
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if(qs>=(qst+qSz)) qs=qst;
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}
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//Below current pixel
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if(MatchPixel(xt,yt+1,width,height,testColour))
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{
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*qs=xt;
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qs++;
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*qs=yt+1;
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qs++;
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SetRGB(xt,yt+1,r,g,b);
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if(qs>=(qst+qSz)) qs=qst;
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}
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//Left of current pixel
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if(MatchPixel(xt-1,yt,width,height,testColour))
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{
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*qs=xt-1;
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qs++;
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*qs=yt;
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qs++;
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SetRGB(xt-1,yt,r,g,b);
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if(qs>=(qst+qSz)) qs=qst;
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}
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//Right of current pixel
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if(MatchPixel(xt+1,yt,width,height,testColour))
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{
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*qs=xt+1;
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qs++;
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*qs=yt;
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qs++;
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SetRGB(xt+1,yt,r,g,b);
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if(qs>=(qst+qSz)) qs=qst;
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}
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//Retrieve current queue member
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qr+=2;
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//Loop back to the beginning
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if(qr>=(qst+qSz)) qr=qst;
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xt=*qr;
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yt=*(qr+1);
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//Go Back to beginning of loop
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}
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delete [] qst ;
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}
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}
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else
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{
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//style is wxFLOOD_BORDER
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// fill up to testColor border - if already testColour don't do anything
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if ( GetRed(x,y) != testColour.Red()
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|| GetGreen(x,y) != testColour.Green()
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|| GetBlue(x,y) != testColour.Blue() )
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{
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//prepare memory for queue
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//queue save, start, read
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size_t *qs, *qst, *qr;
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//queue size (physical)
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long qSz= height * width * 2;
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qst = new size_t [qSz];
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//temporary x and y locations
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int xt, yt;
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for (int i=0; i < qSz; i++)
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qst[i] = 0;
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// start queue
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qs=qr=qst;
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*qs=xt=x;
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qs++;
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*qs=yt=y;
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qs++;
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SetRGB(xt,yt,r,g,b);
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//Main queue loop
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while(qr!=qs)
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{
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//Add new members to queue
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//Above current pixel
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if(!MatchBoundaryPixel(xt,yt-1,width,height,fillColour,testColour))
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{
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*qs=xt;
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qs++;
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*qs=yt-1;
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qs++;
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SetRGB(xt,yt-1,r,g,b);
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//Loop back to beginning of queue
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if(qs>=(qst+qSz)) qs=qst;
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}
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//Below current pixel
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if(!MatchBoundaryPixel(xt,yt+1,width,height,fillColour,testColour))
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{
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*qs=xt;
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qs++;
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*qs=yt+1;
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qs++;
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SetRGB(xt,yt+1,r,g,b);
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if(qs>=(qst+qSz)) qs=qst;
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}
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//Left of current pixel
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if(!MatchBoundaryPixel(xt-1,yt,width,height,fillColour,testColour))
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{
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*qs=xt-1;
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qs++;
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*qs=yt;
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qs++;
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SetRGB(xt-1,yt,r,g,b);
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if(qs>=(qst+qSz)) qs=qst;
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}
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//Right of current pixel
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if(!MatchBoundaryPixel(xt+1,yt,width,height,fillColour,testColour))
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{
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*qs=xt+1;
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qs++;
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*qs=yt;
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qs++;
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SetRGB(xt+1,yt,r,g,b);
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if(qs>=(qst+qSz)) qs=qst;
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}
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//Retrieve current queue member
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qr+=2;
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//Loop back to the beginning
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if(qr>=(qst+qSz)) qr=qst;
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xt=*qr;
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yt=*(qr+1);
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//Go Back to beginning of loop
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}
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delete [] qst ;
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}
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}
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//all done,
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}
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#endif // wxUSE_IMAGE
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