1 files changed, 152 insertions, 0 deletions
diff --git a/source/blender/compositor/operations/COM_TonemapOperation.cc b/source/blender/compositor/operations/COM_TonemapOperation.cc
new file mode 100644
index 00000000000..4c1d285a69f
--- /dev/null
+++ b/source/blender/compositor/operations/COM_TonemapOperation.cc
@@ -0,0 +1,152 @@
+/*
+ * 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_TonemapOperation.h"
+#include "BLI_math.h"
+#include "BLI_utildefines.h"
+
+#include "IMB_colormanagement.h"
+
+TonemapOperation::TonemapOperation()
+{
+  this->addInputSocket(COM_DT_COLOR, COM_SC_NO_RESIZE);
+  this->addOutputSocket(COM_DT_COLOR);
+  this->m_imageReader = nullptr;
+  this->m_data = nullptr;
+  this->m_cachedInstance = nullptr;
+  this->setComplex(true);
+}
+void TonemapOperation::initExecution()
+{
+  this->m_imageReader = this->getInputSocketReader(0);
+  NodeOperation::initMutex();
+}
+
+void TonemapOperation::executePixel(float output[4], int x, int y, void *data)
+{
+  AvgLogLum *avg = (AvgLogLum *)data;
+
+  this->m_imageReader->read(output, x, y, nullptr);
+  mul_v3_fl(output, avg->al);
+  float dr = output[0] + this->m_data->offset;
+  float dg = output[1] + this->m_data->offset;
+  float db = output[2] + this->m_data->offset;
+  output[0] /= ((dr == 0.0f) ? 1.0f : dr);
+  output[1] /= ((dg == 0.0f) ? 1.0f : dg);
+  output[2] /= ((db == 0.0f) ? 1.0f : db);
+  const float igm = avg->igm;
+  if (igm != 0.0f) {
+    output[0] = powf(MAX2(output[0], 0.0f), igm);
+    output[1] = powf(MAX2(output[1], 0.0f), igm);
+    output[2] = powf(MAX2(output[2], 0.0f), igm);
+  }
+}
+void PhotoreceptorTonemapOperation::executePixel(float output[4], int x, int y, void *data)
+{
+  AvgLogLum *avg = (AvgLogLum *)data;
+  NodeTonemap *ntm = this->m_data;
+
+  const float f = expf(-this->m_data->f);
+  const float m = (ntm->m > 0.0f) ? ntm->m : (0.3f + 0.7f * powf(avg->auto_key, 1.4f));
+  const float ic = 1.0f - ntm->c, ia = 1.0f - ntm->a;
+
+  this->m_imageReader->read(output, x, y, nullptr);
+
+  const float L = IMB_colormanagement_get_luminance(output);
+  float I_l = output[0] + ic * (L - output[0]);
+  float I_g = avg->cav[0] + ic * (avg->lav - avg->cav[0]);
+  float I_a = I_l + ia * (I_g - I_l);
+  output[0] /= (output[0] + powf(f * I_a, m));
+  I_l = output[1] + ic * (L - output[1]);
+  I_g = avg->cav[1] + ic * (avg->lav - avg->cav[1]);
+  I_a = I_l + ia * (I_g - I_l);
+  output[1] /= (output[1] + powf(f * I_a, m));
+  I_l = output[2] + ic * (L - output[2]);
+  I_g = avg->cav[2] + ic * (avg->lav - avg->cav[2]);
+  I_a = I_l + ia * (I_g - I_l);
+  output[2] /= (output[2] + powf(f * I_a, m));
+}
+
+void TonemapOperation::deinitExecution()
+{
+  this->m_imageReader = nullptr;
+  delete this->m_cachedInstance;
+  NodeOperation::deinitMutex();
+}
+
+bool TonemapOperation::determineDependingAreaOfInterest(rcti * /*input*/,
+                                                        ReadBufferOperation *readOperation,
+                                                        rcti *output)
+{
+  rcti imageInput;
+
+  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 *TonemapOperation::initializeTileData(rcti *rect)
+{
+  lockMutex();
+  if (this->m_cachedInstance == nullptr) {
+    MemoryBuffer *tile = (MemoryBuffer *)this->m_imageReader->initializeTileData(rect);
+    AvgLogLum *data = new AvgLogLum();
+
+    float *buffer = tile->getBuffer();
+
+    float lsum = 0.0f;
+    int p = tile->getWidth() * tile->getHeight();
+    float *bc = buffer;
+    float avl, maxl = -1e10f, minl = 1e10f;
+    const float sc = 1.0f / p;
+    float Lav = 0.0f;
+    float cav[4] = {0.0f, 0.0f, 0.0f, 0.0f};
+    while (p--) {
+      float L = IMB_colormanagement_get_luminance(bc);
+      Lav += L;
+      add_v3_v3(cav, bc);
+      lsum += logf(MAX2(L, 0.0f) + 1e-5f);
+      maxl = (L > maxl) ? L : maxl;
+      minl = (L < minl) ? L : minl;
+      bc += 4;
+    }
+    data->lav = Lav * sc;
+    mul_v3_v3fl(data->cav, cav, sc);
+    maxl = log((double)maxl + 1e-5);
+    minl = log((double)minl + 1e-5);
+    avl = lsum * sc;
+    data->auto_key = (maxl > minl) ? ((maxl - avl) / (maxl - minl)) : 1.0f;
+    float al = exp((double)avl);
+    data->al = (al == 0.0f) ? 0.0f : (this->m_data->key / al);
+    data->igm = (this->m_data->gamma == 0.0f) ? 1 : (1.0f / this->m_data->gamma);
+    this->m_cachedInstance = data;
+  }
+  unlockMutex();
+  return this->m_cachedInstance;
+}
+
+void TonemapOperation::deinitializeTileData(rcti * /*rect*/, void * /*data*/)
+{
+  /* pass */
+}