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/*
* Copyright 2013, Blender Foundation.
*
* 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.
*
* Contributor:
* Sergey Sharybin
*/
#include "COM_PlaneTrackWarpImageOperation.h"
#include "COM_ReadBufferOperation.h"
#include "MEM_guardedalloc.h"
#include "BLI_listbase.h"
#include "BLI_math.h"
#include "BLI_math_color.h"
extern "C" {
# include "BLI_jitter.h"
# include "BKE_movieclip.h"
# include "BKE_node.h"
# include "BKE_tracking.h"
}
BLI_INLINE void warpCoord(float x, float y, float matrix[3][3], float uv[2], float deriv[2][2])
{
float vec[3] = {x, y, 1.0f};
mul_m3_v3(matrix, vec);
uv[0] = vec[0] / vec[2];
uv[1] = vec[1] / vec[2];
deriv[0][0] = (matrix[0][0] - matrix[0][2] * uv[0]) / vec[2];
deriv[1][0] = (matrix[0][1] - matrix[0][2] * uv[1]) / vec[2];
deriv[0][1] = (matrix[1][0] - matrix[1][2] * uv[0]) / vec[2];
deriv[1][1] = (matrix[1][1] - matrix[1][2] * uv[1]) / vec[2];
}
PlaneTrackWarpImageOperation::PlaneTrackWarpImageOperation() : PlaneTrackCommonOperation()
{
this->addInputSocket(COM_DT_COLOR, COM_SC_NO_RESIZE);
this->addOutputSocket(COM_DT_COLOR);
this->m_pixelReader = NULL;
this->setComplex(true);
}
void PlaneTrackWarpImageOperation::initExecution()
{
PlaneTrackCommonOperation::initExecution();
this->m_pixelReader = this->getInputSocketReader(0);
const int width = this->m_pixelReader->getWidth();
const int height = this->m_pixelReader->getHeight();
float frame_corners[4][2] = {{0.0f, 0.0f},
{(float) width, 0.0f},
{(float) width, (float) height},
{0.0f, (float) height}};
BKE_tracking_homography_between_two_quads(this->m_frameSpaceCorners,
frame_corners,
this->m_perspectiveMatrix);
}
void PlaneTrackWarpImageOperation::deinitExecution()
{
this->m_pixelReader = NULL;
}
void PlaneTrackWarpImageOperation::executePixelSampled(float output[4], float x, float y, PixelSampler sampler)
{
float xy[2] = {x, y};
float uv[2];
float deriv[2][2];
pixelTransform(xy, uv, deriv);
m_pixelReader->readFiltered(output, uv[0], uv[1], deriv[0], deriv[1], COM_PS_BILINEAR);
}
void PlaneTrackWarpImageOperation::pixelTransform(const float xy[2], float r_uv[2], float r_deriv[2][2])
{
warpCoord(xy[0], xy[1], m_perspectiveMatrix, r_uv, r_deriv);
}
bool PlaneTrackWarpImageOperation::determineDependingAreaOfInterest(rcti *input, ReadBufferOperation *readOperation, rcti *output)
{
float UVs[4][2];
float deriv[2][2];
/* TODO(sergey): figure out proper way to do this. */
warpCoord(input->xmin - 2, input->ymin - 2, this->m_perspectiveMatrix, UVs[0], deriv);
warpCoord(input->xmax + 2, input->ymin - 2, this->m_perspectiveMatrix, UVs[1], deriv);
warpCoord(input->xmax + 2, input->ymax + 2, this->m_perspectiveMatrix, UVs[2], deriv);
warpCoord(input->xmin - 2, input->ymax + 2, this->m_perspectiveMatrix, UVs[3], deriv);
float min[2], max[2];
INIT_MINMAX2(min, max);
for (int i = 0; i < 4; i++) {
minmax_v2v2_v2(min, max, UVs[i]);
}
rcti newInput;
newInput.xmin = min[0] - 1;
newInput.ymin = min[1] - 1;
newInput.xmax = max[0] + 1;
newInput.ymax = max[1] + 1;
return NodeOperation::determineDependingAreaOfInterest(&newInput, readOperation, output);
}
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