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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_DotproductOperation.h"
namespace blender::compositor {
DotproductOperation::DotproductOperation()
{
this->add_input_socket(DataType::Vector);
this->add_input_socket(DataType::Vector);
this->add_output_socket(DataType::Value);
this->set_canvas_input_index(0);
input1Operation_ = nullptr;
input2Operation_ = nullptr;
flags.can_be_constant = true;
}
void DotproductOperation::init_execution()
{
input1Operation_ = this->get_input_socket_reader(0);
input2Operation_ = this->get_input_socket_reader(1);
}
void DotproductOperation::deinit_execution()
{
input1Operation_ = nullptr;
input2Operation_ = nullptr;
}
/** \todo current implementation is the inverse of a dot-product. not 'logically' correct
*/
void DotproductOperation::execute_pixel_sampled(float output[4],
float x,
float y,
PixelSampler sampler)
{
float input1[4];
float input2[4];
input1Operation_->read_sampled(input1, x, y, sampler);
input2Operation_->read_sampled(input2, x, y, sampler);
output[0] = -(input1[0] * input2[0] + input1[1] * input2[1] + input1[2] * input2[2]);
}
void DotproductOperation::update_memory_buffer_partial(MemoryBuffer *output,
const rcti &area,
Span<MemoryBuffer *> inputs)
{
for (BuffersIterator<float> it = output->iterate_with(inputs, area); !it.is_end(); ++it) {
const float *input1 = it.in(0);
const float *input2 = it.in(1);
*it.out = -(input1[0] * input2[0] + input1[1] * input2[1] + input1[2] * input2[2]);
}
}
} // namespace blender::compositor
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