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diff --git a/source/blender/compositor/operations/COM_MixOperation.h b/source/blender/compositor/operations/COM_MixOperation.h
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+/*
+ * 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
+ */
+
+#ifndef _COM_MixBaseOperation_h
+#define _COM_MixBaseOperation_h
+#include "COM_NodeOperation.h"
+
+
+/**
+ * All this programs converts an input color to an output value.
+ * it assumes we are in sRGB color space.
+ */
+
+class MixBaseOperation : public NodeOperation {
+protected:
+	/**
+	 * Prefetched reference to the inputProgram
+	 */
+	SocketReader *m_inputValueOperation;
+	SocketReader *m_inputColor1Operation;
+	SocketReader *m_inputColor2Operation;
+	bool m_valueAlphaMultiply;
+	bool m_useClamp;
+
+	inline void clampIfNeeded(float color[4])
+	{
+		if (m_useClamp) {
+			CLAMP(color[0], 0.0f, 1.0f);
+			CLAMP(color[1], 0.0f, 1.0f);
+			CLAMP(color[2], 0.0f, 1.0f);
+			CLAMP(color[3], 0.0f, 1.0f);
+		}
+	}
+	
+public:
+	/**
+	 * Default constructor
+	 */
+	MixBaseOperation();
+	
+	/**
+	 * the inner loop of this program
+	 */
+	void executePixel(float output[4], float x, float y, PixelSampler sampler);
+	
+	/**
+	 * Initialize the execution
+	 */
+	void initExecution();
+	
+	/**
+	 * Deinitialize the execution
+	 */
+	void deinitExecution();
+
+	void determineResolution(unsigned int resolution[2], unsigned int preferredResolution[2]);
+
+	
+	void setUseValueAlphaMultiply(const bool value) { this->m_valueAlphaMultiply = value; }
+	bool useValueAlphaMultiply() { return this->m_valueAlphaMultiply; }
+	void setUseClamp(bool value) { this->m_useClamp = value; }
+};
+
+class MixAddOperation : public MixBaseOperation {
+public:
+	MixAddOperation();
+	void executePixel(float output[4], float x, float y, PixelSampler sampler);
+};
+
+class MixBlendOperation : public MixBaseOperation {
+public:
+	MixBlendOperation();
+	void executePixel(float output[4], float x, float y, PixelSampler sampler);
+};
+
+class MixBurnOperation : public MixBaseOperation {
+public:
+	MixBurnOperation();
+	void executePixel(float output[4], float x, float y, PixelSampler sampler);
+};
+
+class MixColorOperation : public MixBaseOperation {
+public:
+	MixColorOperation();
+	void executePixel(float output[4], float x, float y, PixelSampler sampler);
+};
+
+class MixDarkenOperation : public MixBaseOperation {
+public:
+	MixDarkenOperation();
+	void executePixel(float output[4], float x, float y, PixelSampler sampler);
+};
+
+class MixDifferenceOperation : public MixBaseOperation {
+public:
+	MixDifferenceOperation();
+	void executePixel(float output[4], float x, float y, PixelSampler sampler);
+};
+
+class MixDivideOperation : public MixBaseOperation {
+public:
+	MixDivideOperation();
+	void executePixel(float output[4], float x, float y, PixelSampler sampler);
+};
+
+class MixDodgeOperation : public MixBaseOperation {
+public:
+	MixDodgeOperation();
+	void executePixel(float output[4], float x, float y, PixelSampler sampler);
+};
+
+class MixGlareOperation : public MixBaseOperation {
+public:
+	MixGlareOperation();
+	void executePixel(float output[4], float x, float y, PixelSampler sampler);
+};
+
+class MixHueOperation : public MixBaseOperation {
+public:
+	MixHueOperation();
+	void executePixel(float output[4], float x, float y, PixelSampler sampler);
+};
+
+class MixLightenOperation : public MixBaseOperation {
+public:
+	MixLightenOperation();
+	void executePixel(float output[4], float x, float y, PixelSampler sampler);
+};
+
+class MixLinearLightOperation : public MixBaseOperation {
+public:
+	MixLinearLightOperation();
+	void executePixel(float output[4], float x, float y, PixelSampler sampler);
+};
+
+class MixMultiplyOperation : public MixBaseOperation {
+public:
+	MixMultiplyOperation();
+	void executePixel(float output[4], float x, float y, PixelSampler sampler);
+};
+
+class MixOverlayOperation : public MixBaseOperation {
+public:
+	MixOverlayOperation();
+	void executePixel(float output[4], float x, float y, PixelSampler sampler);
+};
+
+class MixSaturationOperation : public MixBaseOperation {
+public:
+	MixSaturationOperation();
+	void executePixel(float output[4], float x, float y, PixelSampler sampler);
+};
+
+class MixScreenOperation : public MixBaseOperation {
+public:
+	MixScreenOperation();
+	void executePixel(float output[4], float x, float y, PixelSampler sampler);
+};
+
+class MixSoftLightOperation : public MixBaseOperation {
+public:
+	MixSoftLightOperation();
+	void executePixel(float output[4], float x, float y, PixelSampler sampler);
+};
+
+class MixSubtractOperation : public MixBaseOperation {
+public:
+	MixSubtractOperation();
+	void executePixel(float output[4], float x, float y, PixelSampler sampler);
+};
+
+class MixValueOperation : public MixBaseOperation {
+public:
+	MixValueOperation();
+	void executePixel(float output[4], float x, float y, PixelSampler sampler);
+};
+
+#endif