1 files changed, 115 insertions, 0 deletions
diff --git a/source/blender/compositor/operations/COM_ConvertDepthToRadiusOperation.cc b/source/blender/compositor/operations/COM_ConvertDepthToRadiusOperation.cc
new file mode 100644
index 00000000000..abf423cc48a
--- /dev/null
+++ b/source/blender/compositor/operations/COM_ConvertDepthToRadiusOperation.cc
@@ -0,0 +1,115 @@
+/*
+ * 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_ConvertDepthToRadiusOperation.h"
+#include "BKE_camera.h"
+#include "BLI_math.h"
+#include "DNA_camera_types.h"
+
+ConvertDepthToRadiusOperation::ConvertDepthToRadiusOperation()
+{
+  this->addInputSocket(COM_DT_VALUE);
+  this->addOutputSocket(COM_DT_VALUE);
+  this->m_inputOperation = nullptr;
+  this->m_fStop = 128.0f;
+  this->m_cameraObject = nullptr;
+  this->m_maxRadius = 32.0f;
+  this->m_blurPostOperation = nullptr;
+}
+
+float ConvertDepthToRadiusOperation::determineFocalDistance()
+{
+  if (this->m_cameraObject && this->m_cameraObject->type == OB_CAMERA) {
+    Camera *camera = (Camera *)this->m_cameraObject->data;
+    this->m_cam_lens = camera->lens;
+    return BKE_camera_object_dof_distance(this->m_cameraObject);
+  }
+
+  return 10.0f;
+}
+
+void ConvertDepthToRadiusOperation::initExecution()
+{
+  float cam_sensor = DEFAULT_SENSOR_WIDTH;
+  Camera *camera = nullptr;
+
+  if (this->m_cameraObject && this->m_cameraObject->type == OB_CAMERA) {
+    camera = (Camera *)this->m_cameraObject->data;
+    cam_sensor = BKE_camera_sensor_size(camera->sensor_fit, camera->sensor_x, camera->sensor_y);
+  }
+
+  this->m_inputOperation = this->getInputSocketReader(0);
+  float focalDistance = determineFocalDistance();
+  if (focalDistance == 0.0f) {
+    focalDistance = 1e10f; /* if the dof is 0.0 then set it to be far away */
+  }
+  this->m_inverseFocalDistance = 1.0f / focalDistance;
+  this->m_aspect = (this->getWidth() > this->getHeight()) ?
+                       (this->getHeight() / (float)this->getWidth()) :
+                       (this->getWidth() / (float)this->getHeight());
+  this->m_aperture = 0.5f * (this->m_cam_lens / (this->m_aspect * cam_sensor)) / this->m_fStop;
+  const float minsz = MIN2(getWidth(), getHeight());
+  this->m_dof_sp = minsz /
+                   ((cam_sensor / 2.0f) /
+                    this->m_cam_lens);  // <- == aspect * MIN2(img->x, img->y) / tan(0.5f * fov);
+
+  if (this->m_blurPostOperation) {
+    m_blurPostOperation->setSigma(MIN2(m_aperture * 128.0f, this->m_maxRadius));
+  }
+}
+
+void ConvertDepthToRadiusOperation::executePixelSampled(float output[4],
+                                                        float x,
+                                                        float y,
+                                                        PixelSampler sampler)
+{
+  float inputValue[4];
+  float z;
+  float radius;
+  this->m_inputOperation->readSampled(inputValue, x, y, sampler);
+  z = inputValue[0];
+  if (z != 0.0f) {
+    float iZ = (1.0f / z);
+
+    /* bug T6656 part 2b, do not re-scale. */
+#if 0
+    bcrad = 0.5f * fabs(aperture * (dof_sp * (cam_invfdist - iZ) - 1.0f));
+    // scale crad back to original maximum and blend
+    crad->rect[px] = bcrad + wts->rect[px] * (scf * crad->rect[px] - bcrad);
+#endif
+    radius = 0.5f * fabsf(this->m_aperture *
+                          (this->m_dof_sp * (this->m_inverseFocalDistance - iZ) - 1.0f));
+    /* 'bug' T6615, limit minimum radius to 1 pixel,
+     * not really a solution, but somewhat mitigates the problem. */
+    if (radius < 0.0f) {
+      radius = 0.0f;
+    }
+    if (radius > this->m_maxRadius) {
+      radius = this->m_maxRadius;
+    }
+    output[0] = radius;
+  }
+  else {
+    output[0] = 0.0f;
+  }
+}
+
+void ConvertDepthToRadiusOperation::deinitExecution()
+{
+  this->m_inputOperation = nullptr;
+}