1 files changed, 103 insertions, 0 deletions
diff --git a/source/blender/compositor/operations/COM_MapRangeOperation.cc b/source/blender/compositor/operations/COM_MapRangeOperation.cc
new file mode 100644
index 00000000000..95b3c27ac2f
--- /dev/null
+++ b/source/blender/compositor/operations/COM_MapRangeOperation.cc
@@ -0,0 +1,103 @@
+/*
+ * 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_MapRangeOperation.h"
+
+MapRangeOperation::MapRangeOperation()
+{
+  this->addInputSocket(COM_DT_VALUE);
+  this->addInputSocket(COM_DT_VALUE);
+  this->addInputSocket(COM_DT_VALUE);
+  this->addInputSocket(COM_DT_VALUE);
+  this->addInputSocket(COM_DT_VALUE);
+  this->addOutputSocket(COM_DT_VALUE);
+  this->m_inputOperation = nullptr;
+  this->m_useClamp = false;
+}
+
+void MapRangeOperation::initExecution()
+{
+  this->m_inputOperation = this->getInputSocketReader(0);
+  this->m_sourceMinOperation = this->getInputSocketReader(1);
+  this->m_sourceMaxOperation = this->getInputSocketReader(2);
+  this->m_destMinOperation = this->getInputSocketReader(3);
+  this->m_destMaxOperation = this->getInputSocketReader(4);
+}
+
+/* The code below assumes all data is inside range +- this, and that input buffer is single channel
+ */
+#define BLENDER_ZMAX 10000.0f
+
+void MapRangeOperation::executePixelSampled(float output[4],
+                                            float x,
+                                            float y,
+                                            PixelSampler sampler)
+{
+  float inputs[8]; /* includes the 5 inputs + 3 pads */
+  float value;
+  float source_min, source_max;
+  float dest_min, dest_max;
+
+  this->m_inputOperation->readSampled(inputs, x, y, sampler);
+  this->m_sourceMinOperation->readSampled(inputs + 1, x, y, sampler);
+  this->m_sourceMaxOperation->readSampled(inputs + 2, x, y, sampler);
+  this->m_destMinOperation->readSampled(inputs + 3, x, y, sampler);
+  this->m_destMaxOperation->readSampled(inputs + 4, x, y, sampler);
+
+  value = inputs[0];
+  source_min = inputs[1];
+  source_max = inputs[2];
+  dest_min = inputs[3];
+  dest_max = inputs[4];
+
+  if (fabsf(source_max - source_min) < 1e-6f) {
+    output[0] = 0.0f;
+    return;
+  }
+
+  if (value >= -BLENDER_ZMAX && value <= BLENDER_ZMAX) {
+    value = (value - source_min) / (source_max - source_min);
+    value = dest_min + value * (dest_max - dest_min);
+  }
+  else if (value > BLENDER_ZMAX) {
+    value = dest_max;
+  }
+  else {
+    value = dest_min;
+  }
+
+  if (this->m_useClamp) {
+    if (dest_max > dest_min) {
+      CLAMP(value, dest_min, dest_max);
+    }
+    else {
+      CLAMP(value, dest_max, dest_min);
+    }
+  }
+
+  output[0] = value;
+}
+
+void MapRangeOperation::deinitExecution()
+{
+  this->m_inputOperation = nullptr;
+  this->m_sourceMinOperation = nullptr;
+  this->m_sourceMaxOperation = nullptr;
+  this->m_destMinOperation = nullptr;
+  this->m_destMaxOperation = nullptr;
+}