1 files changed, 89 insertions, 0 deletions
diff --git a/source/blender/compositor/operations/COM_KeyingDespillOperation.cpp b/source/blender/compositor/operations/COM_KeyingDespillOperation.cpp
new file mode 100644
index 00000000000..04523384653
--- /dev/null
+++ b/source/blender/compositor/operations/COM_KeyingDespillOperation.cpp
@@ -0,0 +1,89 @@
+/*
+ * Copyright 2012, Blender Foundation.
+ *
+ * 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.
+ *
+ * Contributor:
+ *		Jeroen Bakker
+ *		Monique Dewanchand
+ *		Sergey Sharybin
+ */
+
+#include "COM_KeyingDespillOperation.h"
+
+#include "MEM_guardedalloc.h"
+
+#include "BLI_listbase.h"
+#include "BLI_math.h"
+
+static int get_pixel_primary_channel(float *pixel)
+{
+	float max_value = MAX3(pixel[0], pixel[1], pixel[2]);
+
+	if (max_value == pixel[0])
+		return 0;
+	else if (max_value == pixel[1])
+		return 1;
+
+	return 2;
+}
+
+KeyingDespillOperation::KeyingDespillOperation() : NodeOperation()
+{
+	this->addInputSocket(COM_DT_COLOR);
+	this->addInputSocket(COM_DT_COLOR);
+	this->addOutputSocket(COM_DT_COLOR);
+
+	this->despillFactor = 0.5f;
+
+	this->pixelReader = NULL;
+	this->screenReader = NULL;
+}
+
+void KeyingDespillOperation::initExecution()
+{
+	this->pixelReader = this->getInputSocketReader(0);
+	this->screenReader = this->getInputSocketReader(1);
+}
+
+void KeyingDespillOperation::deinitExecution()
+{
+	this->pixelReader = NULL;
+	this->screenReader = NULL;
+}
+
+void KeyingDespillOperation::executePixel(float *color, float x, float y, PixelSampler sampler, MemoryBuffer *inputBuffers[])
+{
+	float pixelColor[4];
+	float screenColor[4];
+
+	this->pixelReader->read(pixelColor, x, y, sampler, inputBuffers);
+	this->screenReader->read(screenColor, x, y, sampler, inputBuffers);
+
+	int screen_primary_channel = get_pixel_primary_channel(screenColor);
+	float average_value, amount;
+
+	average_value = (pixelColor[0] + pixelColor[1] + pixelColor[2] - pixelColor[screen_primary_channel]) / 2.0f;
+	amount = pixelColor[screen_primary_channel] - average_value;
+
+	color[0] = pixelColor[0];
+	color[1] = pixelColor[1];
+	color[2] = pixelColor[2];
+	color[3] = pixelColor[3];
+	
+	if (this->despillFactor * amount > 0) {
+		color[screen_primary_channel] = pixelColor[screen_primary_channel] - this->despillFactor * amount;
+	}
+}