1 files changed, 95 insertions, 0 deletions
diff --git a/chalk/plugins/filters/colors/kis_color_to_alpha.cpp b/chalk/plugins/filters/colors/kis_color_to_alpha.cpp
new file mode 100644
index 000000000..26f428448
--- /dev/null
+++ b/chalk/plugins/filters/colors/kis_color_to_alpha.cpp
@@ -0,0 +1,95 @@
+/*
+ * This file is part of Chalk
+ *
+ * Copyright (c) 2006 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_color_to_alpha.h"
+
+#include <tqcheckbox.h>
+#include <tqspinbox.h>
+
+#include <kcolorbutton.h>
+
+#include <kis_iterators_pixel.h>
+
+#include "wdgcolortoalphabase.h"
+#include "kis_wdg_color_to_alpha.h"
+
+KisFilterColorToAlpha::KisFilterColorToAlpha() : KisFilter(id(), "colors", i18n("&Color to Alpha..."))
+{
+}
+
+KisFilterConfigWidget * KisFilterColorToAlpha::createConfigurationWidget(TQWidget* parent, KisPaintDeviceSP )
+{
+    return new KisWdgColorToAlpha(this, parent, "configuration of color to alpha");
+}
+
+KisFilterConfiguration* KisFilterColorToAlpha::configuration(TQWidget* w)
+{
+    KisWdgColorToAlpha * wCTA = dynamic_cast<KisWdgColorToAlpha*>(w);
+    KisFilterConfiguration* config = new KisFilterConfiguration("colortoalpha", 1);
+    if(wCTA)
+    {
+        config->setProperty("targetcolor", wCTA->widget()->colorTarget->color() );
+        config->setProperty("threshold", wCTA->widget()->intThreshold->value());
+    }
+    return config;
+}
+
+void KisFilterColorToAlpha::process(KisPaintDeviceSP src, KisPaintDeviceSP dst, KisFilterConfiguration* config, const TQRect& rect)
+{
+    Q_ASSERT(src != 0);
+    Q_ASSERT(dst != 0);
+    
+    if(config == 0) config = new KisFilterConfiguration("colortoalpha", 1);
+    
+    TQVariant value;
+    TQColor cTA = (config->getProperty("targetcolor", value)) ? value.toColor() : TQColor(255,255,255);
+    int threshold = (config->getProperty("threshold", value)) ? value.toInt() : 0;
+    
+    KisRectIteratorPixel dstIt = dst->createRectIterator(rect.x(), rect.y(), rect.width(), rect.height(), true );
+    KisRectIteratorPixel srcIt = src->createRectIterator(rect.x(), rect.y(), rect.width(), rect.height(), false);
+
+    int pixelsProcessed = 0;
+    setProgressTotalSteps(rect.width() * rect.height());
+
+    KisColorSpace * cs = src->colorSpace();
+    TQ_INT32 pixelsize = cs->pixelSize();
+    
+    TQ_UINT8* color = new TQ_UINT8[pixelsize];
+    cs->fromTQColor(cTA, color);
+    
+    while( ! srcIt.isDone() )
+    {
+        if(srcIt.isSelected())
+        {
+            TQ_UINT8 d = cs->difference(color, srcIt.oldRawData());
+            if( d >= threshold )
+            {
+                    cs->setAlpha(dstIt.rawData(), 255, 1);
+            } else {
+                cs->setAlpha(dstIt.rawData(), (255 * d ) / threshold, 1 );
+            }
+        }
+        setProgress(++pixelsProcessed);
+        ++srcIt;
+        ++dstIt;
+    }
+    delete[] color;
+    setProgressDone(); // Must be called even if you don't really support progression
+}