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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_ProjectorLensDistortionOperation.h"
#include "BLI_math.h"
#include "BLI_utildefines.h"
namespace blender::compositor {
ProjectorLensDistortionOperation::ProjectorLensDistortionOperation()
{
this->addInputSocket(DataType::Color);
this->addInputSocket(DataType::Value);
this->addOutputSocket(DataType::Color);
this->flags.complex = true;
this->m_inputProgram = nullptr;
this->m_dispersionAvailable = false;
this->m_dispersion = 0.0f;
}
void ProjectorLensDistortionOperation::initExecution()
{
this->initMutex();
this->m_inputProgram = this->getInputSocketReader(0);
}
void *ProjectorLensDistortionOperation::initializeTileData(rcti * /*rect*/)
{
updateDispersion();
void *buffer = this->m_inputProgram->initializeTileData(nullptr);
return buffer;
}
void ProjectorLensDistortionOperation::executePixel(float output[4], int x, int y, void *data)
{
float inputValue[4];
const float height = this->getHeight();
const float width = this->getWidth();
const float v = (y + 0.5f) / height;
const float u = (x + 0.5f) / width;
MemoryBuffer *inputBuffer = (MemoryBuffer *)data;
inputBuffer->readBilinear(inputValue, (u * width + this->m_kr2) - 0.5f, v * height - 0.5f);
output[0] = inputValue[0];
inputBuffer->read(inputValue, x, y);
output[1] = inputValue[1];
inputBuffer->readBilinear(inputValue, (u * width - this->m_kr2) - 0.5f, v * height - 0.5f);
output[2] = inputValue[2];
output[3] = 1.0f;
}
void ProjectorLensDistortionOperation::deinitExecution()
{
this->deinitMutex();
this->m_inputProgram = nullptr;
}
bool ProjectorLensDistortionOperation::determineDependingAreaOfInterest(
rcti *input, ReadBufferOperation *readOperation, rcti *output)
{
rcti newInput;
if (this->m_dispersionAvailable) {
newInput.ymax = input->ymax;
newInput.ymin = input->ymin;
newInput.xmin = input->xmin - this->m_kr2 - 2;
newInput.xmax = input->xmax + this->m_kr2 + 2;
}
else {
rcti dispInput;
BLI_rcti_init(&dispInput, 0, 5, 0, 5);
if (this->getInputOperation(1)->determineDependingAreaOfInterest(
&dispInput, readOperation, output)) {
return true;
}
newInput.xmin = input->xmin - 7; /* (0.25f * 20 * 1) + 2 == worse case dispersion */
newInput.ymin = input->ymin;
newInput.ymax = input->ymax;
newInput.xmax = input->xmax + 7; /* (0.25f * 20 * 1) + 2 == worse case dispersion */
}
if (this->getInputOperation(0)->determineDependingAreaOfInterest(
&newInput, readOperation, output)) {
return true;
}
return false;
}
void ProjectorLensDistortionOperation::updateDispersion()
{
if (this->m_dispersionAvailable) {
return;
}
this->lockMutex();
if (!this->m_dispersionAvailable) {
float result[4];
this->getInputSocketReader(1)->readSampled(result, 1, 1, PixelSampler::Nearest);
this->m_dispersion = result[0];
this->m_kr = 0.25f * max_ff(min_ff(this->m_dispersion, 1.0f), 0.0f);
this->m_kr2 = this->m_kr * 20;
this->m_dispersionAvailable = true;
}
this->unlockMutex();
}
} // namespace blender::compositor
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