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/*
* This file is part of Chalk
*
* Copyright (c) 2005 Michael Thaler <michael.thaler@physik.tu-muenchen.de>
*
* ported from Gimp, Copyright (C) 1997 Eiichi Takamori <taka@ma1.seikyou.ne.jp>
* original pixelize.c for GIMP 0.54 by Tracy Scott
*
* 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 <stdlib.h>
#include <vector>
#include <tqpoint.h>
#include <tqspinbox.h>
#include <tdelocale.h>
#include <kiconloader.h>
#include <kinstance.h>
#include <tdemessagebox.h>
#include <kstandarddirs.h>
#include <tdetempfile.h>
#include <kdebug.h>
#include <kgenericfactory.h>
#include <knuminput.h>
#include <kis_doc.h>
#include <kis_image.h>
#include <kis_iterators_pixel.h>
#include <kis_layer.h>
#include <kis_filter_registry.h>
#include <kis_global.h>
#include <kis_types.h>
#include <kis_progress_display_interface.h>
#include "kis_multi_bool_filter_widget.h"
#include "kis_sobel_filter.h"
#define MIN(a,b) (((a)<(b))?(a):(b))
void KisSobelFilterConfiguration::fromXML(const TQString & s)
{
KisFilterConfiguration::fromXML(s);
m_doHorizontally = getBool( "doHorizontally" );
m_doVertically = getBool( "doVertically" );
m_keepSign = getBool( "makeOpaque" );
}
TQString KisSobelFilterConfiguration::toString()
{
m_properties.clear();
setProperty("doHorizontally", m_doHorizontally);
setProperty("doVertically", m_doVertically);
setProperty("keepSign", m_keepSign);
setProperty("makeOpaque", m_makeOpaque);
return KisFilterConfiguration::toString();
}
KisSobelFilter::KisSobelFilter() : KisFilter(id(), "edge", i18n("&Sobel..."))
{
}
void KisSobelFilter::process(KisPaintDeviceSP src, KisPaintDeviceSP dst, KisFilterConfiguration* configuration, const TQRect& rect)
{
//read the filter configuration values from the KisFilterConfiguration object
bool doHorizontally = ((KisSobelFilterConfiguration*)configuration)->doHorizontally();
bool doVertically = ((KisSobelFilterConfiguration*)configuration)->doVertically();
bool keepSign = ((KisSobelFilterConfiguration*)configuration)->keepSign();
bool makeOpaque = ((KisSobelFilterConfiguration*)configuration)->makeOpaque();
//pixelize(src, dst, x, y, width, height, pixelWidth, pixelHeight);
sobel(rect, src, dst, doHorizontally, doVertically, keepSign, makeOpaque);
}
void KisSobelFilter::prepareRow (KisPaintDeviceSP src, TQ_UINT8* data, TQ_UINT32 x, TQ_UINT32 y, TQ_UINT32 w, TQ_UINT32 h)
{
if (y > h -1) y = h -1;
TQ_UINT32 pixelSize = src->pixelSize();
src->readBytes( data, x, y, w, 1 );
for (TQ_UINT32 b = 0; b < pixelSize; b++) {
int offset = pixelSize - b;
data[-offset] = data[b];
data[w * pixelSize + b] = data[(w - 1) * pixelSize + b];
}
}
#define RMS(a, b) (sqrt ((a) * (a) + (b) * (b)))
#define ROUND(x) ((int) ((x) + 0.5))
void KisSobelFilter::sobel(const TQRect & rc, KisPaintDeviceSP src, KisPaintDeviceSP dst, bool doHorizontal, bool doVertical, bool keepSign, bool makeOpaque)
{
TQRect rect = rc; //src->exactBounds();
TQ_UINT32 x = rect.x();
TQ_UINT32 y = rect.y();
TQ_UINT32 width = rect.width();
TQ_UINT32 height = rect.height();
TQ_UINT32 pixelSize = src->pixelSize();
setProgressTotalSteps( height );
setProgressStage(i18n("Applying sobel filter..."),0);
/* allocate row buffers */
TQ_UINT8* prevRow = new TQ_UINT8[ (width + 2) * pixelSize];
TQ_CHECK_PTR(prevRow);
TQ_UINT8* curRow = new TQ_UINT8[ (width + 2) * pixelSize];
TQ_CHECK_PTR(curRow);
TQ_UINT8* nextRow = new TQ_UINT8[ (width + 2) * pixelSize];
TQ_CHECK_PTR(nextRow);
TQ_UINT8* dest = new TQ_UINT8[ width * pixelSize];
TQ_CHECK_PTR(dest);
TQ_UINT8* pr = prevRow + pixelSize;
TQ_UINT8* cr = curRow + pixelSize;
TQ_UINT8* nr = nextRow + pixelSize;
prepareRow (src, pr, x, y - 1, width, height);
prepareRow (src, cr, x, y, width, height);
TQ_UINT32 counter =0;
TQ_UINT8* d;
TQ_UINT8* tmp;
TQ_INT32 gradient, horGradient, verGradient;
// loop through the rows, applying the sobel convolution
for (TQ_UINT32 row = 0; row < height; row++)
{
// prepare the next row
prepareRow (src, nr, x, row + 1, width, height);
d = dest;
for (TQ_UINT32 col = 0; col < width * pixelSize; col++)
{
int positive = col + pixelSize;
int negative = col - pixelSize;
horGradient = (doHorizontal ?
((pr[negative] + 2 * pr[col] + pr[positive]) -
(nr[negative] + 2 * nr[col] + nr[positive]))
: 0);
verGradient = (doVertical ?
((pr[negative] + 2 * cr[negative] + nr[negative]) -
(pr[positive] + 2 * cr[positive] + nr[positive]))
: 0);
gradient = (TQ_INT32)((doVertical && doHorizontal) ?
(ROUND (RMS (horGradient, verGradient)) / 5.66) // always >0
: (keepSign ? (127 + (ROUND ((horGradient + verGradient) / 8.0)))
: (ROUND (TQABS (horGradient + verGradient) / 4.0))));
*d++ = gradient;
if (gradient > 10) counter ++;
}
// shuffle the row pointers
tmp = pr;
pr = cr;
cr = nr;
nr = tmp;
//store the dest
dst->writeBytes(dest, x, row, width, 1);
if ( makeOpaque )
{
KisHLineIteratorPixel dstIt = dst->createHLineIterator(x, row, width, true);
while( ! dstIt.isDone() )
{
dstIt.rawData()[pixelSize-1]=255; //XXXX: is the alpha channel always 8 bit? Otherwise this is wrong!
++dstIt;
}
}
setProgress(row);
}
setProgressDone();
delete[] prevRow;
delete[] curRow;
delete[] nextRow;
delete[] dest;
}
KisFilterConfigWidget * KisSobelFilter::createConfigurationWidget(TQWidget* parent, KisPaintDeviceSP)
{
vKisBoolWidgetParam param;
param.push_back( KisBoolWidgetParam( true, i18n("Sobel horizontally"), "doHorizontally" ) );
param.push_back( KisBoolWidgetParam( true, i18n("Sobel vertically"), "doVertically" ) );
param.push_back( KisBoolWidgetParam( true, i18n("Keep sign of result"), "keepSign" ) );
param.push_back( KisBoolWidgetParam( true, i18n("Make image opaque"), "makeOpaque" ) );
return new KisMultiBoolFilterWidget(parent, id().id().ascii(), id().id().ascii(), param );
}
KisFilterConfiguration* KisSobelFilter::configuration(TQWidget* nwidget)
{
KisMultiBoolFilterWidget* widget = (KisMultiBoolFilterWidget*) nwidget;
if( widget == 0 )
{
return new KisSobelFilterConfiguration( true, true, true, true);
} else {
return new KisSobelFilterConfiguration( widget->valueAt( 0 ), widget->valueAt( 1 ), widget->valueAt( 2 ), widget->valueAt( 3 ) );
}
}
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