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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_MovieDistortionOperation.h"
#include "BKE_movieclip.h"
namespace blender::compositor {
MovieDistortionOperation::MovieDistortionOperation(bool distortion)
{
this->addInputSocket(DataType::Color);
this->addOutputSocket(DataType::Color);
this->set_canvas_input_index(0);
m_inputOperation = nullptr;
m_movieClip = nullptr;
m_apply = distortion;
}
void MovieDistortionOperation::init_data()
{
if (m_movieClip) {
MovieTracking *tracking = &m_movieClip->tracking;
MovieClipUser clipUser = {0};
int calibration_width, calibration_height;
BKE_movieclip_user_set_frame(&clipUser, m_framenumber);
BKE_movieclip_get_size(m_movieClip, &clipUser, &calibration_width, &calibration_height);
float delta[2];
rcti full_frame;
full_frame.xmin = full_frame.ymin = 0;
full_frame.xmax = this->getWidth();
full_frame.ymax = this->getHeight();
BKE_tracking_max_distortion_delta_across_bound(
tracking, this->getWidth(), this->getHeight(), &full_frame, !m_apply, delta);
/* 5 is just in case we didn't hit real max of distortion in
* BKE_tracking_max_undistortion_delta_across_bound
*/
m_margin[0] = delta[0] + 5;
m_margin[1] = delta[1] + 5;
m_calibration_width = calibration_width;
m_calibration_height = calibration_height;
m_pixel_aspect = tracking->camera.pixel_aspect;
}
else {
m_margin[0] = m_margin[1] = 0;
}
}
void MovieDistortionOperation::initExecution()
{
m_inputOperation = this->getInputSocketReader(0);
if (m_movieClip) {
MovieTracking *tracking = &m_movieClip->tracking;
m_distortion = BKE_tracking_distortion_new(
tracking, m_calibration_width, m_calibration_height);
}
else {
m_distortion = nullptr;
}
}
void MovieDistortionOperation::deinitExecution()
{
m_inputOperation = nullptr;
m_movieClip = nullptr;
if (m_distortion != nullptr) {
BKE_tracking_distortion_free(m_distortion);
}
}
void MovieDistortionOperation::executePixelSampled(float output[4],
float x,
float y,
PixelSampler /*sampler*/)
{
if (m_distortion != nullptr) {
/* float overscan = 0.0f; */
const float pixel_aspect = m_pixel_aspect;
const float w = (float)this->getWidth() /* / (1 + overscan) */;
const float h = (float)this->getHeight() /* / (1 + overscan) */;
const float aspx = w / (float)m_calibration_width;
const float aspy = h / (float)m_calibration_height;
float in[2];
float out[2];
in[0] = (x /* - 0.5 * overscan * w */) / aspx;
in[1] = (y /* - 0.5 * overscan * h */) / aspy / pixel_aspect;
if (m_apply) {
BKE_tracking_distortion_undistort_v2(m_distortion, in, out);
}
else {
BKE_tracking_distortion_distort_v2(m_distortion, in, out);
}
float u = out[0] * aspx /* + 0.5 * overscan * w */,
v = (out[1] * aspy /* + 0.5 * overscan * h */) * pixel_aspect;
m_inputOperation->readSampled(output, u, v, PixelSampler::Bilinear);
}
else {
m_inputOperation->readSampled(output, x, y, PixelSampler::Bilinear);
}
}
bool MovieDistortionOperation::determineDependingAreaOfInterest(rcti *input,
ReadBufferOperation *readOperation,
rcti *output)
{
rcti newInput;
newInput.xmin = input->xmin - m_margin[0];
newInput.ymin = input->ymin - m_margin[1];
newInput.xmax = input->xmax + m_margin[0];
newInput.ymax = input->ymax + m_margin[1];
return NodeOperation::determineDependingAreaOfInterest(&newInput, readOperation, output);
}
void MovieDistortionOperation::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 - m_margin[0];
r_input_area.ymin = output_area.ymin - m_margin[1];
r_input_area.xmax = output_area.xmax + m_margin[0];
r_input_area.ymax = output_area.ymax + m_margin[1];
}
void MovieDistortionOperation::update_memory_buffer_partial(MemoryBuffer *output,
const rcti &area,
Span<MemoryBuffer *> inputs)
{
const MemoryBuffer *input_img = inputs[0];
if (m_distortion == nullptr) {
output->copy_from(input_img, area);
return;
}
/* `float overscan = 0.0f;` */
const float pixel_aspect = m_pixel_aspect;
const float w = (float)this->getWidth() /* `/ (1 + overscan)` */;
const float h = (float)this->getHeight() /* `/ (1 + overscan)` */;
const float aspx = w / (float)m_calibration_width;
const float aspy = h / (float)m_calibration_height;
float xy[2];
float distorted_xy[2];
for (BuffersIterator<float> it = output->iterate_with({}, area); !it.is_end(); ++it) {
xy[0] = (it.x /* `- 0.5 * overscan * w` */) / aspx;
xy[1] = (it.y /* `- 0.5 * overscan * h` */) / aspy / pixel_aspect;
if (m_apply) {
BKE_tracking_distortion_undistort_v2(m_distortion, xy, distorted_xy);
}
else {
BKE_tracking_distortion_distort_v2(m_distortion, xy, distorted_xy);
}
const float u = distorted_xy[0] * aspx /* `+ 0.5 * overscan * w` */;
const float v = (distorted_xy[1] * aspy /* `+ 0.5 * overscan * h` */) * pixel_aspect;
input_img->read_elem_bilinear(u, v, it.out);
}
}
} // namespace blender::compositor
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