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107 lines
3.4 KiB
107 lines
3.4 KiB
/*
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* Copyright (c) 2004 Cyrille Berger <cberger@cberger.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "kis_autobrush_resource.h"
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#include <kdebug.h>
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void KisAutobrushShape::createBrush( TQImage* img)
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{
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img->create(m_w, m_h, 32);
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for(int j = 0; j < m_h; j++)
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{
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for(int i = 0; i < m_w; i++)
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{
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TQ_INT8 v = valueAt(i,j);
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img->setPixel( i, j, tqRgb(v,v,v));
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}
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}
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}
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KisAutobrushCircleShape::KisAutobrushCircleShape(TQ_INT32 w, TQ_INT32 h, double fh, double fv)
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: KisAutobrushShape( w, h, w / 2.0 - fh, h / 2.0 - fv),
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m_xcentre ( w / 2.0 ),
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m_ycentre ( h / 2.0 ),
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m_xcoef ( 2.0 / w ),
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m_ycoef ( 2.0 / h ),
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m_xfadecoef ( (m_fh == 0) ? 1 : ( 1.0 / m_fh)),
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m_yfadecoef ( (m_fv == 0) ? 1 : ( 1.0 / m_fv))
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{
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}
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TQ_INT8 KisAutobrushCircleShape::valueAt(TQ_INT32 x, TQ_INT32 y)
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{
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double xr = (x - m_xcentre) + 0.5;
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double yr = (y - m_ycentre) + 0.5;
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double n = norme( xr * m_xcoef, yr * m_ycoef);
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if( n > 1 )
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{
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return 255;
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}
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else
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{
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double normeFade = norme( xr * m_xfadecoef, yr * m_yfadecoef );
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if( normeFade > 1)
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{
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double xle, yle;
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// xle stands for x-coordinate limit exterior
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// yle stands for y-coordinate limit exterior
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// we are computing the coordinate on the external ellipse in order to compute
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// the fade value
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if( xr == 0 )
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{
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xle = 0;
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yle = yr > 0 ? 1/m_ycoef : -1/m_ycoef;
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} else {
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double c = yr / (double)xr;
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xle = sqrt(1 / norme( m_xcoef, c * m_ycoef ));
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xle = xr > 0 ? xle : -xle;
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yle = xle * c;
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}
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// On the internal limit of the fade area, normeFade is equal to 1
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double normeFadeLimitE = norme( xle * m_xfadecoef, yle * m_yfadecoef );
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return (uchar)(255 * ( normeFade - 1 ) / ( normeFadeLimitE - 1 ));
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} else {
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return 0;
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}
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}
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}
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KisAutobrushRectShape::KisAutobrushRectShape(TQ_INT32 w, TQ_INT32 h, double fh, double fv)
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: KisAutobrushShape( w, h, w / 2.0 - fh, h / 2.0 - fv),
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m_xcentre ( w / 2.0 ),
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m_ycentre ( h / 2.0 ),
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m_c( fv/fh)
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{
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}
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TQ_INT8 KisAutobrushRectShape::valueAt(TQ_INT32 x, TQ_INT32 y)
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{
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double xr = TQABS(x - m_xcentre);
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double yr = TQABS(y - m_ycentre);
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if( xr > m_fh || yr > m_fv )
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{
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if( yr <= ((xr - m_fh) * m_c + m_fv ) )
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{
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return (uchar)(255 * (xr - m_fh) / (m_w - m_fh));
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} else {
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return (uchar)(255 * (yr - m_fv) / (m_w - m_fv));
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}
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}
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else {
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return 0;
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}
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}
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