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/*
* 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"
namespace blender::compositor {
ConvertDepthToRadiusOperation::ConvertDepthToRadiusOperation()
{
this->addInputSocket(DataType::Value);
this->addOutputSocket(DataType::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;
}
} // namespace blender::compositor
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