1 files changed, 106 insertions, 0 deletions
diff --git a/krita/core/kis_autobrush_resource.cc b/krita/core/kis_autobrush_resource.cc
new file mode 100644
index 00000000..6e45c64a
--- /dev/null
+++ b/krita/core/kis_autobrush_resource.cc
@@ -0,0 +1,106 @@
+/*
+ *  Copyright (c) 2004 Cyrille Berger <cberger@cberger.net>
+ *
+ *  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 "kis_autobrush_resource.h"
+#include <kdebug.h>
+
+void KisAutobrushShape::createBrush( QImage* img)
+{
+    img->create(m_w, m_h, 32);
+    for(int j = 0; j < m_h; j++)
+    {
+        for(int i = 0; i < m_w; i++)
+        {
+            Q_INT8 v = valueAt(i,j);
+            img->setPixel( i, j, qRgb(v,v,v));
+        }
+    }
+}
+
+KisAutobrushCircleShape::KisAutobrushCircleShape(Q_INT32 w, Q_INT32 h, double fh, double fv)
+    : KisAutobrushShape( w, h, w / 2.0 - fh, h / 2.0 - fv),
+        m_xcentre ( w / 2.0 ),
+        m_ycentre ( h / 2.0 ),
+        m_xcoef ( 2.0 / w ),
+        m_ycoef ( 2.0 / h ),
+        m_xfadecoef ( (m_fh == 0) ? 1 : ( 1.0 / m_fh)),
+        m_yfadecoef ( (m_fv == 0) ? 1 : ( 1.0 / m_fv))
+{
+}
+Q_INT8 KisAutobrushCircleShape::valueAt(Q_INT32 x, Q_INT32 y)
+{
+    double xr = (x - m_xcentre) + 0.5;
+    double yr = (y - m_ycentre) + 0.5;
+    double n = norme( xr * m_xcoef, yr * m_ycoef);
+    if( n > 1 )
+    {
+        return 255;
+    }
+    else
+    {
+        double normeFade = norme( xr * m_xfadecoef, yr * m_yfadecoef );
+        if( normeFade > 1)
+        {
+            double xle, yle;
+            // xle stands for x-coordinate limit exterior
+            // yle stands for y-coordinate limit exterior
+            // we are computing the coordinate on the external ellipse in order to compute
+            // the fade value
+            if( xr == 0 )
+            {
+                xle = 0;
+                yle = yr > 0 ? 1/m_ycoef : -1/m_ycoef;
+            } else {
+                double c = yr / (double)xr;
+                xle = sqrt(1 / norme( m_xcoef, c * m_ycoef ));
+                xle = xr > 0 ? xle : -xle;
+                yle = xle * c;
+            }
+            // On the internal limit of the fade area, normeFade is equal to 1
+            double normeFadeLimitE = norme( xle * m_xfadecoef, yle * m_yfadecoef );
+            return (uchar)(255 * ( normeFade - 1 ) / ( normeFadeLimitE - 1 ));
+        } else {
+            return 0;
+        }
+    }
+}
+
+KisAutobrushRectShape::KisAutobrushRectShape(Q_INT32 w, Q_INT32 h, double fh, double fv)
+    : KisAutobrushShape( w, h, w / 2.0 - fh, h / 2.0 - fv),
+        m_xcentre ( w / 2.0 ),
+        m_ycentre ( h / 2.0 ),
+        m_c( fv/fh)
+{
+}
+Q_INT8 KisAutobrushRectShape::valueAt(Q_INT32 x, Q_INT32 y)
+{
+    double xr = QABS(x - m_xcentre);
+    double yr = QABS(y - m_ycentre);
+    if( xr > m_fh || yr > m_fv )
+    {
+        if( yr <= ((xr - m_fh) * m_c + m_fv )  )
+        {
+            return (uchar)(255 * (xr - m_fh) / (m_w - m_fh));
+        } else {
+            return (uchar)(255 * (yr - m_fv) / (m_w - m_fv));
+        }
+    }
+    else {
+        return 0;
+    }
+}