1 files changed, 127 insertions, 0 deletions
diff --git a/source/blender/compositor/operations/COM_CalculateMeanOperation.cc b/source/blender/compositor/operations/COM_CalculateMeanOperation.cc
new file mode 100644
index 00000000000..9ccf9d7f1ef
--- /dev/null
+++ b/source/blender/compositor/operations/COM_CalculateMeanOperation.cc
@@ -0,0 +1,127 @@
+/*
+ * 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.
+ *
+ * Copyright 2011, Blender Foundation.
+ */
+
+#include "COM_CalculateMeanOperation.h"
+#include "BLI_math.h"
+#include "BLI_utildefines.h"
+
+#include "IMB_colormanagement.h"
+
+CalculateMeanOperation::CalculateMeanOperation()
+{
+  this->addInputSocket(COM_DT_COLOR, COM_SC_NO_RESIZE);
+  this->addOutputSocket(COM_DT_VALUE);
+  this->m_imageReader = nullptr;
+  this->m_iscalculated = false;
+  this->m_setting = 1;
+  this->setComplex(true);
+}
+void CalculateMeanOperation::initExecution()
+{
+  this->m_imageReader = this->getInputSocketReader(0);
+  this->m_iscalculated = false;
+  NodeOperation::initMutex();
+}
+
+void CalculateMeanOperation::executePixel(float output[4], int /*x*/, int /*y*/, void * /*data*/)
+{
+  output[0] = this->m_result;
+}
+
+void CalculateMeanOperation::deinitExecution()
+{
+  this->m_imageReader = nullptr;
+  NodeOperation::deinitMutex();
+}
+
+bool CalculateMeanOperation::determineDependingAreaOfInterest(rcti * /*input*/,
+                                                              ReadBufferOperation *readOperation,
+                                                              rcti *output)
+{
+  rcti imageInput;
+  if (this->m_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)
+{
+  lockMutex();
+  if (!this->m_iscalculated) {
+    MemoryBuffer *tile = (MemoryBuffer *)this->m_imageReader->initializeTileData(rect);
+    calculateMean(tile);
+    this->m_iscalculated = true;
+  }
+  unlockMutex();
+  return nullptr;
+}
+
+void CalculateMeanOperation::calculateMean(MemoryBuffer *tile)
+{
+  this->m_result = 0.0f;
+  float *buffer = tile->getBuffer();
+  int size = tile->getWidth() * tile->getHeight();
+  int pixels = 0;
+  float sum = 0.0f;
+  for (int i = 0, offset = 0; i < size; i++, offset += 4) {
+    if (buffer[offset + 3] > 0) {
+      pixels++;
+
+      switch (this->m_setting) {
+        case 1: {
+          sum += IMB_colormanagement_get_luminance(&buffer[offset]);
+          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],
+                     BLI_YUV_ITU_BT709);
+          sum += yuv[0];
+          break;
+        }
+      }
+    }
+  }
+  this->m_result = sum / pixels;
+}