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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_RotateOperation.h"
#include "BLI_math.h"
RotateOperation::RotateOperation()
{
this->addInputSocket(DataType::Color);
this->addInputSocket(DataType::Value);
this->addOutputSocket(DataType::Color);
this->setResolutionInputSocketIndex(0);
this->m_imageSocket = nullptr;
this->m_degreeSocket = nullptr;
this->m_doDegree2RadConversion = false;
this->m_isDegreeSet = false;
}
void RotateOperation::initExecution()
{
this->m_imageSocket = this->getInputSocketReader(0);
this->m_degreeSocket = this->getInputSocketReader(1);
this->m_centerX = (getWidth() - 1) / 2.0;
this->m_centerY = (getHeight() - 1) / 2.0;
}
void RotateOperation::deinitExecution()
{
this->m_imageSocket = nullptr;
this->m_degreeSocket = nullptr;
}
inline void RotateOperation::ensureDegree()
{
if (!this->m_isDegreeSet) {
float degree[4];
this->m_degreeSocket->readSampled(degree, 0, 0, PixelSampler::Nearest);
double rad;
if (this->m_doDegree2RadConversion) {
rad = DEG2RAD((double)degree[0]);
}
else {
rad = degree[0];
}
this->m_cosine = cos(rad);
this->m_sine = sin(rad);
this->m_isDegreeSet = true;
}
}
void RotateOperation::executePixelSampled(float output[4], float x, float y, PixelSampler sampler)
{
ensureDegree();
const float dy = y - this->m_centerY;
const float dx = x - this->m_centerX;
const float nx = this->m_centerX + (this->m_cosine * dx + this->m_sine * dy);
const float ny = this->m_centerY + (-this->m_sine * dx + this->m_cosine * dy);
this->m_imageSocket->readSampled(output, nx, ny, sampler);
}
bool RotateOperation::determineDependingAreaOfInterest(rcti *input,
ReadBufferOperation *readOperation,
rcti *output)
{
ensureDegree();
rcti newInput;
const float dxmin = input->xmin - this->m_centerX;
const float dymin = input->ymin - this->m_centerY;
const float dxmax = input->xmax - this->m_centerX;
const float dymax = input->ymax - this->m_centerY;
const float x1 = this->m_centerX + (this->m_cosine * dxmin + this->m_sine * dymin);
const float x2 = this->m_centerX + (this->m_cosine * dxmax + this->m_sine * dymin);
const float x3 = this->m_centerX + (this->m_cosine * dxmin + this->m_sine * dymax);
const float x4 = this->m_centerX + (this->m_cosine * dxmax + this->m_sine * dymax);
const float y1 = this->m_centerY + (-this->m_sine * dxmin + this->m_cosine * dymin);
const float y2 = this->m_centerY + (-this->m_sine * dxmax + this->m_cosine * dymin);
const float y3 = this->m_centerY + (-this->m_sine * dxmin + this->m_cosine * dymax);
const float y4 = this->m_centerY + (-this->m_sine * dxmax + this->m_cosine * dymax);
const float minx = MIN2(x1, MIN2(x2, MIN2(x3, x4)));
const float maxx = MAX2(x1, MAX2(x2, MAX2(x3, x4)));
const float miny = MIN2(y1, MIN2(y2, MIN2(y3, y4)));
const float maxy = MAX2(y1, MAX2(y2, MAX2(y3, y4)));
newInput.xmax = ceil(maxx) + 1;
newInput.xmin = floor(minx) - 1;
newInput.ymax = ceil(maxy) + 1;
newInput.ymin = floor(miny) - 1;
return NodeOperation::determineDependingAreaOfInterest(&newInput, readOperation, output);
}
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