1 files changed, 81 insertions, 0 deletions
diff --git a/source/blender/compositor/operations/COM_KeyingDespillOperation.cc b/source/blender/compositor/operations/COM_KeyingDespillOperation.cc
new file mode 100644
index 00000000000..f4d0d6c6a00
--- /dev/null
+++ b/source/blender/compositor/operations/COM_KeyingDespillOperation.cc
@@ -0,0 +1,81 @@
+/*
+ * 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_KeyingDespillOperation.h"
+
+#include "MEM_guardedalloc.h"
+
+#include "BLI_listbase.h"
+#include "BLI_math.h"
+
+KeyingDespillOperation::KeyingDespillOperation()
+{
+  this->addInputSocket(COM_DT_COLOR);
+  this->addInputSocket(COM_DT_COLOR);
+  this->addOutputSocket(COM_DT_COLOR);
+
+  this->m_despillFactor = 0.5f;
+  this->m_colorBalance = 0.5f;
+
+  this->m_pixelReader = nullptr;
+  this->m_screenReader = nullptr;
+}
+
+void KeyingDespillOperation::initExecution()
+{
+  this->m_pixelReader = this->getInputSocketReader(0);
+  this->m_screenReader = this->getInputSocketReader(1);
+}
+
+void KeyingDespillOperation::deinitExecution()
+{
+  this->m_pixelReader = nullptr;
+  this->m_screenReader = nullptr;
+}
+
+void KeyingDespillOperation::executePixelSampled(float output[4],
+                                                 float x,
+                                                 float y,
+                                                 PixelSampler sampler)
+{
+  float pixelColor[4];
+  float screenColor[4];
+
+  this->m_pixelReader->readSampled(pixelColor, x, y, sampler);
+  this->m_screenReader->readSampled(screenColor, x, y, sampler);
+
+  const int screen_primary_channel = max_axis_v3(screenColor);
+  const int other_1 = (screen_primary_channel + 1) % 3;
+  const int other_2 = (screen_primary_channel + 2) % 3;
+
+  const int min_channel = MIN2(other_1, other_2);
+  const int max_channel = MAX2(other_1, other_2);
+
+  float average_value, amount;
+
+  average_value = this->m_colorBalance * pixelColor[min_channel] +
+                  (1.0f - this->m_colorBalance) * pixelColor[max_channel];
+  amount = (pixelColor[screen_primary_channel] - average_value);
+
+  copy_v4_v4(output, pixelColor);
+
+  const float amount_despill = this->m_despillFactor * amount;
+  if (amount_despill > 0.0f) {
+    output[screen_primary_channel] = pixelColor[screen_primary_channel] - amount_despill;
+  }
+}