1 files changed, 48 insertions, 0 deletions
diff --git a/source/blender/compositor/operations/COM_MixScreenOperation.cpp b/source/blender/compositor/operations/COM_MixScreenOperation.cpp
new file mode 100644
index 00000000000..25004ca7257
--- /dev/null
+++ b/source/blender/compositor/operations/COM_MixScreenOperation.cpp
@@ -0,0 +1,48 @@
+/*
+ * 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: 
+ *		Jeroen Bakker 
+ *		Monique Dewanchand
+ */
+
+#include "COM_MixScreenOperation.h"
+
+MixScreenOperation::MixScreenOperation(): MixBaseOperation() {
+}
+
+void MixScreenOperation::executePixel(float* outputValue, float x, float y, PixelSampler sampler, MemoryBuffer *inputBuffers[]) {
+	float inputColor1[4];
+	float inputColor2[4];
+	float valuev[4];
+
+	inputValueOperation->read(valuev, x, y, sampler, inputBuffers);
+	inputColor1Operation->read(&inputColor1[0], x, y, sampler, inputBuffers);
+	inputColor2Operation->read(&inputColor2[0], x, y, sampler, inputBuffers);
+
+	float value = valuev[0];
+	if (this->useValueAlphaMultiply()) {
+		value *= inputColor2[3];
+	}
+	float valuem= 1.0f-value;
+
+	outputValue[0] = 1.0f - (valuem + value*(1.0f-inputColor2[0])) *(1.0f-inputColor1[0]);
+	outputValue[1] = 1.0f - (valuem + value*(1.0f-inputColor2[1])) *(1.0f-inputColor1[1]);
+	outputValue[2] = 1.0f - (valuem + value*(1.0f-inputColor2[2])) *(1.0f-inputColor1[2]);
+	outputValue[3] = inputColor1[3];
+}
+