124 lines
3.9 KiB
C++
124 lines
3.9 KiB
C++
/*
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* Copyright 2013, Blender Foundation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Contributor:
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* Sergey Sharybin
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*/
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#include "COM_PlaneTrackWarpImageOperation.h"
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#include "COM_ReadBufferOperation.h"
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#include "MEM_guardedalloc.h"
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#include "BLI_listbase.h"
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#include "BLI_math.h"
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#include "BLI_math_color.h"
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extern "C" {
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# include "BLI_jitter.h"
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# include "BKE_movieclip.h"
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# include "BKE_node.h"
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# include "BKE_tracking.h"
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}
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BLI_INLINE void warpCoord(float x, float y, float matrix[3][3], float uv[2], float deriv[2][2])
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{
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float vec[3] = {x, y, 1.0f};
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mul_m3_v3(matrix, vec);
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uv[0] = vec[0] / vec[2];
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uv[1] = vec[1] / vec[2];
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deriv[0][0] = (matrix[0][0] - matrix[0][2] * uv[0]) / vec[2];
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deriv[1][0] = (matrix[0][1] - matrix[0][2] * uv[1]) / vec[2];
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deriv[0][1] = (matrix[1][0] - matrix[1][2] * uv[0]) / vec[2];
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deriv[1][1] = (matrix[1][1] - matrix[1][2] * uv[1]) / vec[2];
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}
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PlaneTrackWarpImageOperation::PlaneTrackWarpImageOperation() : PlaneTrackCommonOperation()
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{
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this->addInputSocket(COM_DT_COLOR, COM_SC_NO_RESIZE);
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this->addOutputSocket(COM_DT_COLOR);
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this->m_pixelReader = NULL;
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this->setComplex(true);
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}
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void PlaneTrackWarpImageOperation::initExecution()
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{
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PlaneTrackCommonOperation::initExecution();
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this->m_pixelReader = this->getInputSocketReader(0);
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const int width = this->m_pixelReader->getWidth();
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const int height = this->m_pixelReader->getHeight();
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float frame_corners[4][2] = {{0.0f, 0.0f},
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{(float) width, 0.0f},
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{(float) width, (float) height},
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{0.0f, (float) height}};
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BKE_tracking_homography_between_two_quads(this->m_frameSpaceCorners,
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frame_corners,
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this->m_perspectiveMatrix);
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}
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void PlaneTrackWarpImageOperation::deinitExecution()
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{
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this->m_pixelReader = NULL;
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}
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void PlaneTrackWarpImageOperation::executePixelSampled(float output[4], float x, float y, PixelSampler sampler)
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{
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float xy[2] = {x, y};
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float uv[2];
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float deriv[2][2];
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pixelTransform(xy, uv, deriv);
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m_pixelReader->readFiltered(output, uv[0], uv[1], deriv[0], deriv[1], COM_PS_BILINEAR);
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}
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void PlaneTrackWarpImageOperation::pixelTransform(const float xy[2], float r_uv[2], float r_deriv[2][2])
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{
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warpCoord(xy[0], xy[1], m_perspectiveMatrix, r_uv, r_deriv);
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}
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bool PlaneTrackWarpImageOperation::determineDependingAreaOfInterest(rcti *input, ReadBufferOperation *readOperation, rcti *output)
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{
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float UVs[4][2];
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float deriv[2][2];
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/* TODO(sergey): figure out proper way to do this. */
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warpCoord(input->xmin - 2, input->ymin - 2, this->m_perspectiveMatrix, UVs[0], deriv);
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warpCoord(input->xmax + 2, input->ymin - 2, this->m_perspectiveMatrix, UVs[1], deriv);
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warpCoord(input->xmax + 2, input->ymax + 2, this->m_perspectiveMatrix, UVs[2], deriv);
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warpCoord(input->xmin - 2, input->ymax + 2, this->m_perspectiveMatrix, UVs[3], deriv);
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float min[2], max[2];
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INIT_MINMAX2(min, max);
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for (int i = 0; i < 4; i++) {
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minmax_v2v2_v2(min, max, UVs[i]);
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}
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rcti newInput;
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newInput.xmin = min[0] - 1;
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newInput.ymin = min[1] - 1;
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newInput.xmax = max[0] + 1;
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newInput.ymax = max[1] + 1;
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return NodeOperation::determineDependingAreaOfInterest(&newInput, readOperation, output);
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}
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