1 files changed, 56 insertions, 0 deletions
diff --git a/source/blender/compositor/operations/COM_GammaOperation.cpp b/source/blender/compositor/operations/COM_GammaOperation.cpp
new file mode 100644
index 00000000000..eaa56c2f31a
--- /dev/null
+++ b/source/blender/compositor/operations/COM_GammaOperation.cpp
@@ -0,0 +1,56 @@
+/*
+ * 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_GammaOperation.h"
+#include "BLI_math.h"
+
+GammaOperation::GammaOperation(): NodeOperation() {
+	this->addInputSocket(COM_DT_COLOR);
+	this->addInputSocket(COM_DT_VALUE);
+	this->addOutputSocket(COM_DT_COLOR);
+	this->inputProgram = NULL;
+	this->inputGammaProgram = NULL;
+}
+void GammaOperation::initExecution() {
+	this->inputProgram = this->getInputSocketReader(0);
+	this->inputGammaProgram = this->getInputSocketReader(1);
+}
+
+void GammaOperation::executePixel(float* color, float x, float y, PixelSampler sampler, MemoryBuffer *inputBuffers[]) {
+	float inputValue[4];
+	float inputGamma[4];
+	
+	this->inputProgram->read(inputValue, x, y, sampler, inputBuffers);
+	this->inputGammaProgram->read(inputGamma, x, y, sampler, inputBuffers);
+	const float gamma = inputGamma[0];
+	/* check for negative to avoid nan's */
+	color[0] = inputValue[0]>0.0f?pow(inputValue[0], gamma):inputValue[0];
+	color[1] = inputValue[1]>0.0f?pow(inputValue[1], gamma):inputValue[1];
+	color[2] = inputValue[2]>0.0f?pow(inputValue[2], gamma):inputValue[2];
+	
+	color[3] = inputValue[3];
+}
+
+void GammaOperation::deinitExecution() {
+	this->inputProgram = NULL;
+	this->inputGammaProgram = NULL;
+}