You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
tdegraphics/kolourpaint/pixmapfx/kpfloodfill.cpp

363 lines
9.7 KiB

/*
Copyright (c) 2003,2004,2005 Clarence Dang <dang@kde.org>
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#define DEBUG_KP_FLOOD_FILL 0
#include <kpfloodfill.h>
#include <tqapplication.h>
#include <tqbitmap.h>
#include <tqpainter.h>
#include <tqpixmap.h>
#include <kdebug.h>
#include <kpdefs.h>
#include <kppixmapfx.h>
#include <kptool.h>
kpFloodFill::kpFloodFill (TQPixmap *pixmap, int x, int y,
const kpColor &color, int processedColorSimilarity)
: m_pixmapPtr (pixmap), m_x (x), m_y (y),
m_color (color), m_processedColorSimilarity (processedColorSimilarity),
m_initState (0)
{
}
kpFloodFill::~kpFloodFill ()
{
}
// private
int kpFloodFill::fillLinesListSize (const TQValueList <kpFloodFill::FillLine> &fillLines) const
{
return (fillLines.size () * kpFloodFill::FillLine::size ());
}
// public
int kpFloodFill::size () const
{
int fillLinesCacheSize = 0;
for (TQValueVector < TQValueList <kpFloodFill::FillLine > >::const_iterator it = m_fillLinesCache.begin ();
it != m_fillLinesCache.end ();
it++)
{
fillLinesCacheSize += fillLinesListSize (*it);
}
return fillLinesListSize (m_fillLines) +
kpPixmapFX::imageSize (m_image) +
fillLinesCacheSize;
}
TQRect kpFloodFill::boundingRect () const
{
return m_boundingRect;
}
bool kpFloodFill::fill ()
{
if (m_initState < 2 && !prepare ())
{
kdError () << "kpFloodFill:fill() could not prepare()!" << endl;
return false;
}
// not trying to do a NOP fill
if (m_boundingRect.isValid ())
{
TQApplication::setOverrideCursor (TQt::waitCursor);
TQPainter painter, maskPainter;
TQBitmap maskBitmap;
if (m_pixmapPtr->mask () || m_color.isTransparent ())
{
maskBitmap = kpPixmapFX::getNonNullMask (*m_pixmapPtr);
maskPainter.begin (&maskBitmap);
maskPainter.setPen (m_color.maskColor ());
}
if (m_color.isOpaque ())
{
painter.begin (m_pixmapPtr);
painter.setPen (m_color.toTQColor ());
}
const TQValueList <FillLine>::ConstIterator fillLinesEnd = m_fillLines.end ();
for (TQValueList <FillLine>::ConstIterator it = m_fillLines.begin ();
it != fillLinesEnd;
it++)
{
TQPoint p1 = TQPoint ((*it).m_x1, (*it).m_y);
TQPoint p2 = TQPoint ((*it).m_x2, (*it).m_y);
if (painter.isActive ())
painter.drawLine (p1, p2);
if (maskPainter.isActive ())
maskPainter.drawLine (p1, p2);
}
if (painter.isActive ())
painter.end ();
if (maskPainter.isActive ())
maskPainter.end ();
if (!maskBitmap.isNull ())
m_pixmapPtr->setMask (maskBitmap);
TQApplication::restoreOverrideCursor ();
}
else
{
#if DEBUG_KP_FLOOD_FILL && 1
kdDebug () << "kpFloodFill::fill() performing NOP fill" << endl;
#endif
}
return true;
}
bool kpFloodFill::prepareColorToChange ()
{
#if DEBUG_KP_FLOOD_FILL && 1
kdDebug () << "kpFloodFill::prepareColorToChange" << endl;
#endif
m_colorToChange = kpPixmapFX::getColorAtPixel (*m_pixmapPtr, TQPoint (m_x, m_y));
if (m_colorToChange.isOpaque ())
{
#if DEBUG_KP_FLOOD_FILL && 1
kdDebug () << "\tcolorToChange: r=" << m_colorToChange.red ()
<< ", b=" << m_colorToChange.blue ()
<< ", g=" << m_colorToChange.green ()
<< endl;
#endif
}
else
{
#if DEBUG_KP_FLOOD_FILL && 1
kdDebug () << "\tcolorToChange: transparent" << endl;
#endif
}
m_initState = 1;
return true;
}
// Derived from the zSprite2 Graphics Engine
bool kpFloodFill::prepare ()
{
#if DEBUG_KP_FLOOD_FILL && 1
kdDebug () << "kpFloodFill::prepare()" << endl;
#endif
m_boundingRect = TQRect ();
if (m_initState < 1 && !prepareColorToChange ())
{
kdError () << "kpFloodFill:prepare() could not prepareColorToChange()!" << endl;
return false;
}
#if DEBUG_KP_FLOOD_FILL && 1
kdDebug () << "\tperforming NOP check" << endl;
#endif
// get the color we need to replace
if (m_processedColorSimilarity == 0 && m_color == m_colorToChange)
{
// need to do absolutely nothing (this is a significant optimisation
// for people who randomly click a lot over already-filled areas)
m_initState = 2; // sync with all "return true"'s
return true;
}
#if DEBUG_KP_FLOOD_FILL && 1
kdDebug () << "\tconverting to image" << endl;
#endif
// is this the only way to read pixels?
m_image = kpPixmapFX::convertToImage (*m_pixmapPtr);
if (m_image.isNull ())
{
kdError () << "kpFloodFill::prepare() could not convert to TQImage" << endl;
return false;
}
#if DEBUG_KP_FLOOD_FILL && 1
kdDebug () << "\tcreating fillLinesCache" << endl;
#endif
// ready cache
m_fillLinesCache.resize (m_pixmapPtr->height ());
#if DEBUG_KP_FLOOD_FILL && 1
kdDebug () << "\tcreating fill lines" << endl;
#endif
// draw initial line
addLine (m_y, findMinX (m_y, m_x), findMaxX (m_y, m_x));
for (TQValueList <FillLine>::ConstIterator it = m_fillLines.begin ();
it != m_fillLines.end ();
it++)
{
#if DEBUG_KP_FLOOD_FILL && 0
kdDebug () << "Expanding from y=" << (*it).m_y
<< " x1=" << (*it).m_x1
<< " x2=" << (*it).m_x2
<< endl;
#endif
// make more lines above and below current line
findAndAddLines (*it, -1);
findAndAddLines (*it, +1);
}
#if DEBUG_KP_FLOOD_FILL && 1
kdDebug () << "\tfinalising memory usage" << endl;
#endif
// finalize memory usage
m_image.reset ();
m_fillLinesCache.clear ();
m_initState = 2; // sync with all "return true"'s
return true;
}
void kpFloodFill::addLine (int y, int x1, int x2)
{
#if DEBUG_KP_FLOOD_FILL && 0
kdDebug () << "kpFillCommand::fillAddLine (" << y << "," << x1 << "," << x2 << ")" << endl;
#endif
m_fillLines.append (FillLine (y, x1, x2));
m_fillLinesCache [y].append (FillLine (y /* OPT */, x1, x2));
m_boundingRect = m_boundingRect.unite (TQRect (TQPoint (x1, y), TQPoint (x2, y)));
}
kpColor kpFloodFill::pixelColor (int x, int y, bool *beenHere) const
{
if (beenHere)
*beenHere = false;
if (y >= (int) m_fillLinesCache.count ())
{
kdError () << "kpFloodFill::pixelColor("
<< x << ","
<< y << ") y out of range=" << m_pixmapPtr->height () << endl;
return kpColor::invalid;
}
const TQValueList <FillLine>::ConstIterator theEnd = m_fillLinesCache [y].end ();
for (TQValueList <FillLine>::ConstIterator it = m_fillLinesCache [y].begin ();
it != theEnd;
it++)
{
if (x >= (*it).m_x1 && x <= (*it).m_x2)
{
if (beenHere)
*beenHere = true;
return m_color;
}
}
return kpPixmapFX::getColorAtPixel (m_image, TQPoint (x, y));
}
bool kpFloodFill::shouldGoTo (int x, int y) const
{
bool beenThere;
const kpColor col = pixelColor (x, y, &beenThere);
return (!beenThere && col.isSimilarTo (m_colorToChange, m_processedColorSimilarity));
}
void kpFloodFill::findAndAddLines (const FillLine &fillLine, int dy)
{
// out of bounds?
if (fillLine.m_y + dy < 0 || fillLine.m_y + dy >= m_pixmapPtr->height ())
return;
for (int xnow = fillLine.m_x1; xnow <= fillLine.m_x2; xnow++)
{
// At current position, right colour?
if (shouldGoTo (xnow, fillLine.m_y + dy))
{
// Find minimum and maximum x values
int minxnow = findMinX (fillLine.m_y + dy, xnow);
int maxxnow = findMaxX (fillLine.m_y + dy, xnow);
// Draw line
addLine (fillLine.m_y + dy, minxnow, maxxnow);
// Move x pointer
xnow = maxxnow;
}
}
}
// finds the minimum x value at a certain line to be filled
int kpFloodFill::findMinX (int y, int x) const
{
for (;;)
{
if (x < 0)
return 0;
if (shouldGoTo (x, y))
x--;
else
return x + 1;
}
}
// finds the maximum x value at a certain line to be filled
int kpFloodFill::findMaxX (int y, int x) const
{
for (;;)
{
if (x > m_pixmapPtr->width () - 1)
return m_pixmapPtr->width () - 1;
if (shouldGoTo (x, y))
x++;
else
return x - 1;
}
}