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/*
* Copyright 2011, Blender Foundation.
*
* 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.
*
* Contributor:
* Jeroen Bakker
* Monique Dewanchand
*/
#include "COM_BokehImageOperation.h"
#include "BLI_math.h"
BokehImageOperation::BokehImageOperation() : NodeOperation()
{
this->addOutputSocket(COM_DT_COLOR);
this->m_deleteData = false;
}
void BokehImageOperation::initExecution()
{
this->m_center[0] = getWidth() / 2;
this->m_center[1] = getHeight() / 2;
this->m_inverseRounding = 1.0f - this->m_data->rounding;
this->m_circularDistance = getWidth() / 2;
this->m_flapRad = (float)(M_PI * 2) / this->m_data->flaps;
this->m_flapRadAdd = this->m_data->angle;
while (this->m_flapRadAdd < 0.0f) {
this->m_flapRadAdd += (float)(M_PI * 2.0);
}
while (this->m_flapRadAdd > (float)M_PI) {
this->m_flapRadAdd -= (float)(M_PI * 2.0);
}
}
void BokehImageOperation::detemineStartPointOfFlap(float r[2], int flapNumber, float distance)
{
r[0] = sinf(this->m_flapRad * flapNumber + this->m_flapRadAdd) * distance + this->m_center[0];
r[1] = cosf(this->m_flapRad * flapNumber + this->m_flapRadAdd) * distance + this->m_center[1];
}
float BokehImageOperation::isInsideBokeh(float distance, float x, float y)
{
float insideBokeh = 0.0f;
const float deltaX = x - this->m_center[0];
const float deltaY = y - this->m_center[1];
float closestPoint[2];
float lineP1[2];
float lineP2[2];
float point[2];
point[0] = x;
point[1] = y;
const float distanceToCenter = len_v2v2(point, this->m_center);
const float bearing = (atan2f(deltaX, deltaY) + (float)(M_PI * 2.0));
int flapNumber = (int)((bearing - this->m_flapRadAdd) / this->m_flapRad);
detemineStartPointOfFlap(lineP1, flapNumber, distance);
detemineStartPointOfFlap(lineP2, flapNumber + 1, distance);
closest_to_line_v2(closestPoint, point, lineP1, lineP2);
const float distanceLineToCenter = len_v2v2(this->m_center, closestPoint);
const float distanceRoundingToCenter = this->m_inverseRounding * distanceLineToCenter + this->m_data->rounding * distance;
const float catadioptricDistanceToCenter = distanceRoundingToCenter * this->m_data->catadioptric;
if (distanceRoundingToCenter >= distanceToCenter && catadioptricDistanceToCenter <= distanceToCenter) {
if (distanceRoundingToCenter - distanceToCenter < 1.0f) {
insideBokeh = (distanceRoundingToCenter - distanceToCenter);
}
else if (this->m_data->catadioptric != 0.0f && distanceToCenter - catadioptricDistanceToCenter < 1.0f) {
insideBokeh = (distanceToCenter - catadioptricDistanceToCenter);
}
else {
insideBokeh = 1.0f;
}
}
return insideBokeh;
}
void BokehImageOperation::executePixelSampled(float output[4], float x, float y, PixelSampler /*sampler*/)
{
float shift = this->m_data->lensshift;
float shift2 = shift / 2.0f;
float distance = this->m_circularDistance;
float insideBokehMax = isInsideBokeh(distance, x, y);
float insideBokehMed = isInsideBokeh(distance - fabsf(shift2 * distance), x, y);
float insideBokehMin = isInsideBokeh(distance - fabsf(shift * distance), x, y);
if (shift < 0) {
output[0] = insideBokehMax;
output[1] = insideBokehMed;
output[2] = insideBokehMin;
}
else {
output[0] = insideBokehMin;
output[1] = insideBokehMed;
output[2] = insideBokehMax;
}
output[3] = (insideBokehMax + insideBokehMed + insideBokehMin) / 3.0f;
}
void BokehImageOperation::deinitExecution()
{
if (this->m_deleteData) {
if (this->m_data) {
delete this->m_data;
this->m_data = NULL;
}
}
}
void BokehImageOperation::determineResolution(unsigned int resolution[2], unsigned int /*preferredResolution*/[2])
{
resolution[0] = COM_BLUR_BOKEH_PIXELS;
resolution[1] = COM_BLUR_BOKEH_PIXELS;
}
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