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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_FlipOperation.h"
namespace blender::compositor {
FlipOperation::FlipOperation()
{
this->addInputSocket(DataType::Color);
this->addOutputSocket(DataType::Color);
this->setResolutionInputSocketIndex(0);
this->m_inputOperation = nullptr;
this->m_flipX = true;
this->m_flipY = false;
}
void FlipOperation::initExecution()
{
this->m_inputOperation = this->getInputSocketReader(0);
}
void FlipOperation::deinitExecution()
{
this->m_inputOperation = nullptr;
}
void FlipOperation::executePixelSampled(float output[4], float x, float y, PixelSampler sampler)
{
float nx = this->m_flipX ? ((int)this->getWidth() - 1) - x : x;
float ny = this->m_flipY ? ((int)this->getHeight() - 1) - y : y;
this->m_inputOperation->readSampled(output, nx, ny, sampler);
}
bool FlipOperation::determineDependingAreaOfInterest(rcti *input,
ReadBufferOperation *readOperation,
rcti *output)
{
rcti newInput;
if (this->m_flipX) {
const int w = (int)this->getWidth() - 1;
newInput.xmax = (w - input->xmin) + 1;
newInput.xmin = (w - input->xmax) - 1;
}
else {
newInput.xmin = input->xmin;
newInput.xmax = input->xmax;
}
if (this->m_flipY) {
const int h = (int)this->getHeight() - 1;
newInput.ymax = (h - input->ymin) + 1;
newInput.ymin = (h - input->ymax) - 1;
}
else {
newInput.ymin = input->ymin;
newInput.ymax = input->ymax;
}
return NodeOperation::determineDependingAreaOfInterest(&newInput, readOperation, output);
}
void FlipOperation::get_area_of_interest(const int input_idx,
const rcti &output_area,
rcti &r_input_area)
{
BLI_assert(input_idx == 0);
UNUSED_VARS_NDEBUG(input_idx);
if (this->m_flipX) {
const int w = (int)this->getWidth() - 1;
r_input_area.xmax = (w - output_area.xmin) + 1;
r_input_area.xmin = (w - output_area.xmax) - 1;
}
else {
r_input_area.xmin = output_area.xmin;
r_input_area.xmax = output_area.xmax;
}
if (this->m_flipY) {
const int h = (int)this->getHeight() - 1;
r_input_area.ymax = (h - output_area.ymin) + 1;
r_input_area.ymin = (h - output_area.ymax) - 1;
}
else {
r_input_area.ymin = output_area.ymin;
r_input_area.ymax = output_area.ymax;
}
}
void FlipOperation::update_memory_buffer_partial(MemoryBuffer *output,
const rcti &area,
Span<MemoryBuffer *> inputs)
{
const MemoryBuffer *input_img = inputs[0];
for (BuffersIterator<float> it = output->iterate_with({}, area); !it.is_end(); ++it) {
const int nx = this->m_flipX ? ((int)this->getWidth() - 1) - it.x : it.x;
const int ny = this->m_flipY ? ((int)this->getHeight() - 1) - it.y : it.y;
input_img->read_elem(nx, ny, it.out);
}
}
} // namespace blender::compositor
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