1 files changed, 86 insertions, 0 deletions
diff --git a/source/blender/compositor/operations/COM_DistanceMatteOperation.cpp b/source/blender/compositor/operations/COM_DistanceMatteOperation.cpp
new file mode 100644
index 00000000000..bef470ca9de
--- /dev/null
+++ b/source/blender/compositor/operations/COM_DistanceMatteOperation.cpp
@@ -0,0 +1,86 @@
+/*
+ * Copyright 2011, 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:
+ *		Dalai Felinto
+ */
+
+#include "COM_DistanceMatteOperation.h"
+#include "BLI_math.h"
+
+DistanceMatteOperation::DistanceMatteOperation(): NodeOperation() {
+	addInputSocket(COM_DT_COLOR);
+	addInputSocket(COM_DT_COLOR);
+	addOutputSocket(COM_DT_VALUE);
+
+	inputImageProgram = NULL;
+	inputKeyProgram = NULL;
+}
+
+void DistanceMatteOperation::initExecution() {
+	this->inputImageProgram = this->getInputSocketReader(0);
+	this->inputKeyProgram = this->getInputSocketReader(1);
+}
+
+void DistanceMatteOperation::deinitExecution() {
+	this->inputImageProgram= NULL;
+	this->inputKeyProgram= NULL;
+}
+
+void DistanceMatteOperation::executePixel(float* outputValue, float x, float y, PixelSampler sampler, MemoryBuffer *inputBuffers[]) {
+	float inKey[4];
+	float inImage[4];
+
+	const float tolerence=this->settings->t1;
+	const float falloff=this->settings->t2;
+
+	float distance;
+	float alpha;
+
+	this->inputKeyProgram->read(inKey, x, y, sampler, inputBuffers);
+	this->inputImageProgram->read(inImage, x, y, sampler, inputBuffers);
+	
+	distance = sqrt(pow((inKey[0]-inImage[0]),2)+
+		pow((inKey[1]-inImage[1]),2)+
+		pow((inKey[2]-inImage[2]),2));
+
+	/* store matte(alpha) value in [0] to go with
+	 * COM_SetAlphaOperation and the Value output
+	 */
+ 
+	/*make 100% transparent */
+	if(distance < tolerence) {
+		outputValue[0]=0.f;
+	}
+	/*in the falloff region, make partially transparent */
+	else if(distance < falloff+tolerence){
+		distance=distance-tolerence;
+		alpha=distance/falloff;
+		/*only change if more transparent than before */
+		if(alpha < inImage[3]) {
+			outputValue[0]=alpha;
+		}
+		else { /* leave as before */
+			outputValue[0]=inImage[3];
+		}
+	}
+	else {
+	/* leave as before */
+		outputValue[0]=inImage[3];
+	}
+}
+