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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_KeyingClipOperation.h"
namespace blender::compositor {
KeyingClipOperation::KeyingClipOperation()
{
this->add_input_socket(DataType::Value);
this->add_output_socket(DataType::Value);
kernel_radius_ = 3;
kernel_tolerance_ = 0.1f;
clip_black_ = 0.0f;
clip_white_ = 1.0f;
is_edge_matte_ = false;
this->flags.complex = true;
}
void *KeyingClipOperation::initialize_tile_data(rcti *rect)
{
void *buffer = get_input_operation(0)->initialize_tile_data(rect);
return buffer;
}
void KeyingClipOperation::execute_pixel(float output[4], int x, int y, void *data)
{
const int delta = kernel_radius_;
const float tolerance = kernel_tolerance_;
MemoryBuffer *input_buffer = (MemoryBuffer *)data;
float *buffer = input_buffer->get_buffer();
int buffer_width = input_buffer->get_width();
int buffer_height = input_buffer->get_height();
float value = buffer[(y * buffer_width + x)];
bool ok = false;
int start_x = max_ff(0, x - delta + 1), start_y = max_ff(0, y - delta + 1),
end_x = min_ff(x + delta - 1, buffer_width - 1),
end_y = min_ff(y + delta - 1, buffer_height - 1);
int count = 0, total_count = (end_x - start_x + 1) * (end_y - start_y + 1) - 1;
int threshold_count = ceil((float)total_count * 0.9f);
if (delta == 0) {
ok = true;
}
for (int cx = start_x; ok == false && cx <= end_x; cx++) {
for (int cy = start_y; ok == false && cy <= end_y; cy++) {
if (UNLIKELY(cx == x && cy == y)) {
continue;
}
int buffer_index = (cy * buffer_width + cx);
float current_value = buffer[buffer_index];
if (fabsf(current_value - value) < tolerance) {
count++;
if (count >= threshold_count) {
ok = true;
}
}
}
}
if (is_edge_matte_) {
if (ok) {
output[0] = 0.0f;
}
else {
output[0] = 1.0f;
}
}
else {
output[0] = value;
if (ok) {
if (output[0] < clip_black_) {
output[0] = 0.0f;
}
else if (output[0] >= clip_white_) {
output[0] = 1.0f;
}
else {
output[0] = (output[0] - clip_black_) / (clip_white_ - clip_black_);
}
}
}
}
bool KeyingClipOperation::determine_depending_area_of_interest(rcti *input,
ReadBufferOperation *read_operation,
rcti *output)
{
rcti new_input;
new_input.xmin = input->xmin - kernel_radius_;
new_input.ymin = input->ymin - kernel_radius_;
new_input.xmax = input->xmax + kernel_radius_;
new_input.ymax = input->ymax + kernel_radius_;
return NodeOperation::determine_depending_area_of_interest(&new_input, read_operation, output);
}
void KeyingClipOperation::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);
r_input_area.xmin = output_area.xmin - kernel_radius_;
r_input_area.xmax = output_area.xmax + kernel_radius_;
r_input_area.ymin = output_area.ymin - kernel_radius_;
r_input_area.ymax = output_area.ymax + kernel_radius_;
}
void KeyingClipOperation::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);
const int delta = kernel_radius_;
const float tolerance = kernel_tolerance_;
const int width = this->get_width();
const int height = this->get_height();
const int row_stride = input->row_stride;
const int elem_stride = input->elem_stride;
for (; !it.is_end(); ++it) {
const int x = it.x;
const int y = it.y;
const int start_x = MAX2(0, x - delta + 1);
const int start_y = MAX2(0, y - delta + 1);
const int end_x = MIN2(x + delta, width);
const int end_y = MIN2(y + delta, height);
const int x_len = end_x - start_x;
const int y_len = end_y - start_y;
const int total_count = x_len * y_len - 1;
const int threshold_count = ceil((float)total_count * 0.9f);
bool ok = false;
if (delta == 0) {
ok = true;
}
const float *main_elem = it.in(0);
const float value = *main_elem;
const float *row = input->get_elem(start_x, start_y);
const float *end_row = row + y_len * row_stride;
int count = 0;
for (; ok == false && row < end_row; row += row_stride) {
const float *end_elem = row + x_len * elem_stride;
for (const float *elem = row; ok == false && elem < end_elem; elem += elem_stride) {
if (UNLIKELY(elem == main_elem)) {
continue;
}
const float current_value = *elem;
if (fabsf(current_value - value) < tolerance) {
count++;
if (count >= threshold_count) {
ok = true;
}
}
}
}
if (is_edge_matte_) {
*it.out = ok ? 0.0f : 1.0f;
}
else {
if (!ok) {
*it.out = value;
}
else if (value < clip_black_) {
*it.out = 0.0f;
}
else if (value >= clip_white_) {
*it.out = 1.0f;
}
else {
*it.out = (value - clip_black_) / (clip_white_ - clip_black_);
}
}
}
}
} // namespace blender::compositor
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