1 files changed, 122 insertions, 0 deletions
diff --git a/source/blender/compositor/operations/COM_CalculateMeanOperation.cpp b/source/blender/compositor/operations/COM_CalculateMeanOperation.cpp
new file mode 100644
index 00000000000..062e7fc69fe
--- /dev/null
+++ b/source/blender/compositor/operations/COM_CalculateMeanOperation.cpp
@@ -0,0 +1,122 @@
+/*
+ * 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_CalculateMeanOperation.h"
+#include "BLI_math.h"
+#include "BLI_utildefines.h"
+
+
+
+CalculateMeanOperation::CalculateMeanOperation(): NodeOperation() {
+	this->addInputSocket(COM_DT_COLOR, COM_SC_NO_RESIZE);
+	this->addOutputSocket(COM_DT_VALUE);
+	this->imageReader = NULL;
+	this->iscalculated = false;
+	this->setting = 1;
+	this->setComplex(true);
+}
+void CalculateMeanOperation::initExecution() {
+	this->imageReader = this->getInputSocketReader(0);
+	this->iscalculated = false;
+	NodeOperation::initMutex();
+}
+
+void CalculateMeanOperation::executePixel(float* color, int x, int y, MemoryBuffer *inputBuffers[], void * data) {
+	color[0] = this->result;
+}
+
+void CalculateMeanOperation::deinitExecution() {
+	this->imageReader = NULL;
+	NodeOperation::deinitMutex();
+}
+
+bool CalculateMeanOperation::determineDependingAreaOfInterest(rcti *input, ReadBufferOperation *readOperation, rcti *output) {
+	rcti imageInput;
+	if (iscalculated) {
+		return false;
+	}
+	NodeOperation* operation = getInputOperation(0);
+	imageInput.xmax = operation->getWidth();
+	imageInput.xmin = 0;
+	imageInput.ymax = operation->getHeight();
+	imageInput.ymin = 0;
+	if (operation->determineDependingAreaOfInterest(&imageInput, readOperation, output) ) {
+		return true;
+	}
+	return false;
+}
+
+void* CalculateMeanOperation::initializeTileData(rcti *rect, MemoryBuffer **memoryBuffers) {
+	BLI_mutex_lock(getMutex());
+	if (!this->iscalculated) {
+		MemoryBuffer* tile = (MemoryBuffer*)imageReader->initializeTileData(rect, memoryBuffers);
+		calculateMean(tile);
+		this->iscalculated = true;
+	}
+	BLI_mutex_unlock(getMutex());
+	return NULL;
+}
+
+void CalculateMeanOperation::calculateMean(MemoryBuffer * tile) {
+	this->result = 0.0f;
+	float* buffer = tile->getBuffer();
+	int size = tile->getWidth()*tile->getHeight();
+	int pixels = 0;
+	float sum;
+	for (int i = 0, offset = 0 ; i < size ; i ++, offset +=4) {
+		if (buffer[offset+3] > 0) {
+			pixels ++;
+	
+			switch(this->setting)
+			{
+			case 1:
+				{
+					sum += buffer[offset]*0.35f + buffer[offset+1]*0.45f + buffer[offset+2]*0.2f;
+					break;
+				}
+			case 2:
+				{
+				sum+= buffer[offset];
+					break;
+				}
+			case 3:
+				{
+				sum+= buffer[offset+1];
+					break;
+				}
+			case 4:
+				{
+				sum+= buffer[offset+2];
+					break;
+				}
+			case 5:
+				{
+					float yuv[3];
+					rgb_to_yuv(buffer[offset], buffer[offset+1], buffer[offset+2], &yuv[0], &yuv[1], &yuv[2]);
+					sum+=yuv[0];
+					break;
+				}
+			}
+		}
+	}
+	this->result = sum / pixels;
+}