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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2011 Blender Foundation. */
#include "COM_FlipOperation.h"
namespace blender::compositor {
FlipOperation::FlipOperation()
{
this->add_input_socket(DataType::Color, ResizeMode::None);
this->add_output_socket(DataType::Color);
this->set_canvas_input_index(0);
input_operation_ = nullptr;
flip_x_ = true;
flip_y_ = false;
}
void FlipOperation::init_execution()
{
input_operation_ = this->get_input_socket_reader(0);
}
void FlipOperation::deinit_execution()
{
input_operation_ = nullptr;
}
void FlipOperation::execute_pixel_sampled(float output[4], float x, float y, PixelSampler sampler)
{
float nx = flip_x_ ? (int(this->get_width()) - 1) - x : x;
float ny = flip_y_ ? (int(this->get_height()) - 1) - y : y;
input_operation_->read_sampled(output, nx, ny, sampler);
}
bool FlipOperation::determine_depending_area_of_interest(rcti *input,
ReadBufferOperation *read_operation,
rcti *output)
{
rcti new_input;
if (flip_x_) {
const int w = int(this->get_width()) - 1;
new_input.xmax = (w - input->xmin) + 1;
new_input.xmin = (w - input->xmax) - 1;
}
else {
new_input.xmin = input->xmin;
new_input.xmax = input->xmax;
}
if (flip_y_) {
const int h = int(this->get_height()) - 1;
new_input.ymax = (h - input->ymin) + 1;
new_input.ymin = (h - input->ymax) - 1;
}
else {
new_input.ymin = input->ymin;
new_input.ymax = input->ymax;
}
return NodeOperation::determine_depending_area_of_interest(&new_input, read_operation, output);
}
void FlipOperation::determine_canvas(const rcti &preferred_area, rcti &r_area)
{
NodeOperation::determine_canvas(preferred_area, r_area);
if (execution_model_ == eExecutionModel::FullFrame) {
rcti input_area = r_area;
if (flip_x_) {
const int width = BLI_rcti_size_x(&input_area) - 1;
r_area.xmax = (width - input_area.xmin) + 1;
r_area.xmin = (width - input_area.xmax) + 1;
}
if (flip_y_) {
const int height = BLI_rcti_size_y(&input_area) - 1;
r_area.ymax = (height - input_area.ymin) + 1;
r_area.ymin = (height - input_area.ymax) + 1;
}
}
}
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 (flip_x_) {
const int w = int(this->get_width()) - 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 (flip_y_) {
const int h = int(this->get_height()) - 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];
const int input_offset_x = input_img->get_rect().xmin;
const int input_offset_y = input_img->get_rect().ymin;
for (BuffersIterator<float> it = output->iterate_with({}, area); !it.is_end(); ++it) {
const int nx = flip_x_ ? (int(this->get_width()) - 1) - it.x : it.x;
const int ny = flip_y_ ? (int(this->get_height()) - 1) - it.y : it.y;
input_img->read_elem(input_offset_x + nx, input_offset_y + ny, it.out);
}
}
} // namespace blender::compositor
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