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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 "COM_ConstantOperation.h"
#include "BLI_math.h"
namespace blender::compositor {
RotateOperation::RotateOperation()
{
this->addInputSocket(DataType::Color);
this->addInputSocket(DataType::Value);
this->addOutputSocket(DataType::Color);
this->set_canvas_input_index(0);
this->m_imageSocket = nullptr;
this->m_degreeSocket = nullptr;
this->m_doDegree2RadConversion = false;
this->m_isDegreeSet = false;
sampler_ = PixelSampler::Nearest;
}
void RotateOperation::get_area_rotation_bounds(const rcti &area,
const float center_x,
const float center_y,
const float sine,
const float cosine,
rcti &r_bounds)
{
const float dxmin = area.xmin - center_x;
const float dymin = area.ymin - center_y;
const float dxmax = area.xmax - center_x;
const float dymax = area.ymax - center_y;
const float x1 = center_x + (cosine * dxmin + sine * dymin);
const float x2 = center_x + (cosine * dxmax + sine * dymin);
const float x3 = center_x + (cosine * dxmin + sine * dymax);
const float x4 = center_x + (cosine * dxmax + sine * dymax);
const float y1 = center_y + (-sine * dxmin + cosine * dymin);
const float y2 = center_y + (-sine * dxmax + cosine * dymin);
const float y3 = center_y + (-sine * dxmin + cosine * dymax);
const float y4 = center_y + (-sine * dxmax + 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)));
r_bounds.xmin = floor(minx);
r_bounds.xmax = ceil(maxx);
r_bounds.ymin = floor(miny);
r_bounds.ymax = ceil(maxy);
}
void RotateOperation::init_data()
{
this->m_centerX = (getWidth() - 1) / 2.0;
this->m_centerY = (getHeight() - 1) / 2.0;
}
void RotateOperation::initExecution()
{
this->m_imageSocket = this->getInputSocketReader(0);
this->m_degreeSocket = this->getInputSocketReader(1);
}
void RotateOperation::deinitExecution()
{
this->m_imageSocket = nullptr;
this->m_degreeSocket = nullptr;
}
inline void RotateOperation::ensureDegree()
{
if (!this->m_isDegreeSet) {
float degree[4];
switch (execution_model_) {
case eExecutionModel::Tiled:
this->m_degreeSocket->readSampled(degree, 0, 0, PixelSampler::Nearest);
break;
case eExecutionModel::FullFrame:
NodeOperation *degree_op = getInputOperation(1);
const bool is_constant_degree = degree_op->get_flags().is_constant_operation;
degree[0] = is_constant_degree ?
static_cast<ConstantOperation *>(degree_op)->get_constant_elem()[0] :
0.0f;
break;
}
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);
}
void RotateOperation::get_area_of_interest(const int input_idx,
const rcti &output_area,
rcti &r_input_area)
{
if (input_idx == 1) {
/* Degrees input is always used as constant. */
r_input_area = COM_CONSTANT_INPUT_AREA_OF_INTEREST;
return;
}
ensureDegree();
get_area_rotation_bounds(output_area, m_centerX, m_centerY, m_sine, m_cosine, r_input_area);
expand_area_for_sampler(r_input_area, sampler_);
}
void RotateOperation::update_memory_buffer_partial(MemoryBuffer *output,
const rcti &area,
Span<MemoryBuffer *> inputs)
{
ensureDegree();
const MemoryBuffer *input_img = inputs[0];
for (BuffersIterator<float> it = output->iterate_with({}, area); !it.is_end(); ++it) {
float x = it.x;
float y = it.y;
rotate_coords(x, y, m_centerX, m_centerY, m_sine, m_cosine);
input_img->read_elem_sampled(x, y, sampler_, it.out);
}
}
} // namespace blender::compositor
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