1 files changed, 126 insertions, 0 deletions
diff --git a/source/blender/compositor/operations/COM_NormalizeOperation.cc b/source/blender/compositor/operations/COM_NormalizeOperation.cc
new file mode 100644
index 00000000000..a8448685332
--- /dev/null
+++ b/source/blender/compositor/operations/COM_NormalizeOperation.cc
@@ -0,0 +1,126 @@
+/*
+ * 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 2012, Blender Foundation.
+ */
+
+#include "COM_NormalizeOperation.h"
+
+NormalizeOperation::NormalizeOperation()
+{
+  this->addInputSocket(COM_DT_VALUE);
+  this->addOutputSocket(COM_DT_VALUE);
+  this->m_imageReader = nullptr;
+  this->m_cachedInstance = nullptr;
+  this->setComplex(true);
+}
+void NormalizeOperation::initExecution()
+{
+  this->m_imageReader = this->getInputSocketReader(0);
+  NodeOperation::initMutex();
+}
+
+void NormalizeOperation::executePixel(float output[4], int x, int y, void *data)
+{
+  /* using generic two floats struct to store x: min  y: mult */
+  NodeTwoFloats *minmult = (NodeTwoFloats *)data;
+
+  this->m_imageReader->read(output, x, y, nullptr);
+
+  output[0] = (output[0] - minmult->x) * minmult->y;
+
+  /* clamp infinities */
+  if (output[0] > 1.0f) {
+    output[0] = 1.0f;
+  }
+  else if (output[0] < 0.0f) {
+    output[0] = 0.0f;
+  }
+}
+
+void NormalizeOperation::deinitExecution()
+{
+  this->m_imageReader = nullptr;
+  delete this->m_cachedInstance;
+  NodeOperation::deinitMutex();
+}
+
+bool NormalizeOperation::determineDependingAreaOfInterest(rcti * /*input*/,
+                                                          ReadBufferOperation *readOperation,
+                                                          rcti *output)
+{
+  rcti imageInput;
+  if (this->m_cachedInstance) {
+    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;
+}
+
+/* The code below assumes all data is inside range +- this, and that input buffer is single channel
+ */
+#define BLENDER_ZMAX 10000.0f
+
+void *NormalizeOperation::initializeTileData(rcti *rect)
+{
+  lockMutex();
+  if (this->m_cachedInstance == nullptr) {
+    MemoryBuffer *tile = (MemoryBuffer *)this->m_imageReader->initializeTileData(rect);
+    /* using generic two floats struct to store x: min  y: mult */
+    NodeTwoFloats *minmult = new NodeTwoFloats();
+
+    float *buffer = tile->getBuffer();
+    int p = tile->getWidth() * tile->getHeight();
+    float *bc = buffer;
+
+    float minv = 1.0f + BLENDER_ZMAX;
+    float maxv = -1.0f - BLENDER_ZMAX;
+
+    float value;
+    while (p--) {
+      value = bc[0];
+      if ((value > maxv) && (value <= BLENDER_ZMAX)) {
+        maxv = value;
+      }
+      if ((value < minv) && (value >= -BLENDER_ZMAX)) {
+        minv = value;
+      }
+      bc++;
+    }
+
+    minmult->x = minv;
+    /* The rare case of flat buffer  would cause a divide by 0 */
+    minmult->y = ((maxv != minv) ? 1.0f / (maxv - minv) : 0.0f);
+
+    this->m_cachedInstance = minmult;
+  }
+
+  unlockMutex();
+  return this->m_cachedInstance;
+}
+
+void NormalizeOperation::deinitializeTileData(rcti * /*rect*/, void * /*data*/)
+{
+  /* pass */
+}