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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 2012, Blender Foundation.
*/
#include "COM_KeyingBlurOperation.h"
namespace blender::compositor {
KeyingBlurOperation::KeyingBlurOperation()
{
this->addInputSocket(DataType::Value);
this->addOutputSocket(DataType::Value);
size_ = 0;
axis_ = BLUR_AXIS_X;
this->flags.complex = true;
}
void *KeyingBlurOperation::initializeTileData(rcti *rect)
{
void *buffer = getInputOperation(0)->initializeTileData(rect);
return buffer;
}
void KeyingBlurOperation::executePixel(float output[4], int x, int y, void *data)
{
MemoryBuffer *inputBuffer = (MemoryBuffer *)data;
const int bufferWidth = inputBuffer->getWidth();
float *buffer = inputBuffer->getBuffer();
int count = 0;
float average = 0.0f;
if (axis_ == 0) {
const int start = MAX2(0, x - size_ + 1), end = MIN2(bufferWidth, x + size_);
for (int cx = start; cx < end; cx++) {
int bufferIndex = (y * bufferWidth + cx);
average += buffer[bufferIndex];
count++;
}
}
else {
const int start = MAX2(0, y - size_ + 1), end = MIN2(inputBuffer->getHeight(), y + size_);
for (int cy = start; cy < end; cy++) {
int bufferIndex = (cy * bufferWidth + x);
average += buffer[bufferIndex];
count++;
}
}
average /= (float)count;
output[0] = average;
}
bool KeyingBlurOperation::determineDependingAreaOfInterest(rcti *input,
ReadBufferOperation *readOperation,
rcti *output)
{
rcti newInput;
if (axis_ == BLUR_AXIS_X) {
newInput.xmin = input->xmin - size_;
newInput.ymin = input->ymin;
newInput.xmax = input->xmax + size_;
newInput.ymax = input->ymax;
}
else {
newInput.xmin = input->xmin;
newInput.ymin = input->ymin - size_;
newInput.xmax = input->xmax;
newInput.ymax = input->ymax + size_;
}
return NodeOperation::determineDependingAreaOfInterest(&newInput, readOperation, output);
}
void KeyingBlurOperation::get_area_of_interest(const int UNUSED(input_idx),
const rcti &output_area,
rcti &r_input_area)
{
switch (axis_) {
case BLUR_AXIS_X:
r_input_area.xmin = output_area.xmin - size_;
r_input_area.ymin = output_area.ymin;
r_input_area.xmax = output_area.xmax + size_;
r_input_area.ymax = output_area.ymax;
break;
case BLUR_AXIS_Y:
r_input_area.xmin = output_area.xmin;
r_input_area.ymin = output_area.ymin - size_;
r_input_area.xmax = output_area.xmax;
r_input_area.ymax = output_area.ymax + size_;
break;
default:
BLI_assert_msg(0, "Unknown axis");
break;
}
}
void KeyingBlurOperation::update_memory_buffer_partial(MemoryBuffer *output,
const rcti &area,
Span<MemoryBuffer *> inputs)
{
const MemoryBuffer *input = inputs[0];
BuffersIterator<float> it = output->iterate_with(inputs, area);
int coord_max;
int elem_stride;
std::function<int()> get_current_coord;
switch (axis_) {
case BLUR_AXIS_X:
get_current_coord = [&] { return it.x; };
coord_max = this->getWidth();
elem_stride = input->elem_stride;
break;
case BLUR_AXIS_Y:
get_current_coord = [&] { return it.y; };
coord_max = this->getHeight();
elem_stride = input->row_stride;
break;
}
for (; !it.is_end(); ++it) {
const int coord = get_current_coord();
const int start_coord = MAX2(0, coord - size_ + 1);
const int end_coord = MIN2(coord_max, coord + size_);
const int count = end_coord - start_coord;
float sum = 0.0f;
const float *start = it.in(0) + (start_coord - coord) * elem_stride;
const float *end = start + count * elem_stride;
for (const float *elem = start; elem < end; elem += elem_stride) {
sum += *elem;
}
*it.out = sum / count;
}
}
} // namespace blender::compositor
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