131 lines
3.6 KiB
C++
131 lines
3.6 KiB
C++
/*
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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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* Copyright 2012, Blender Foundation.
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*/
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#include "COM_NormalizeOperation.h"
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namespace blender::compositor {
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NormalizeOperation::NormalizeOperation()
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{
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this->addInputSocket(DataType::Value);
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this->addOutputSocket(DataType::Value);
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this->m_imageReader = nullptr;
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this->m_cachedInstance = nullptr;
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this->flags.complex = true;
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}
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void NormalizeOperation::initExecution()
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{
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this->m_imageReader = this->getInputSocketReader(0);
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NodeOperation::initMutex();
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}
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void NormalizeOperation::executePixel(float output[4], int x, int y, void *data)
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{
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/* using generic two floats struct to store x: min y: mult */
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NodeTwoFloats *minmult = (NodeTwoFloats *)data;
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this->m_imageReader->read(output, x, y, nullptr);
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output[0] = (output[0] - minmult->x) * minmult->y;
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/* clamp infinities */
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if (output[0] > 1.0f) {
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output[0] = 1.0f;
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}
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else if (output[0] < 0.0f) {
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output[0] = 0.0f;
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}
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}
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void NormalizeOperation::deinitExecution()
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{
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this->m_imageReader = nullptr;
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delete this->m_cachedInstance;
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NodeOperation::deinitMutex();
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}
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bool NormalizeOperation::determineDependingAreaOfInterest(rcti * /*input*/,
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ReadBufferOperation *readOperation,
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rcti *output)
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{
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rcti imageInput;
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if (this->m_cachedInstance) {
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return false;
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}
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NodeOperation *operation = getInputOperation(0);
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imageInput.xmax = operation->getWidth();
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imageInput.xmin = 0;
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imageInput.ymax = operation->getHeight();
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imageInput.ymin = 0;
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if (operation->determineDependingAreaOfInterest(&imageInput, readOperation, output)) {
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return true;
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}
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return false;
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}
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/* The code below assumes all data is inside range +- this, and that input buffer is single channel
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*/
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#define BLENDER_ZMAX 10000.0f
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void *NormalizeOperation::initializeTileData(rcti *rect)
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{
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lockMutex();
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if (this->m_cachedInstance == nullptr) {
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MemoryBuffer *tile = (MemoryBuffer *)this->m_imageReader->initializeTileData(rect);
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/* using generic two floats struct to store x: min y: mult */
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NodeTwoFloats *minmult = new NodeTwoFloats();
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float *buffer = tile->getBuffer();
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int p = tile->getWidth() * tile->getHeight();
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float *bc = buffer;
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float minv = 1.0f + BLENDER_ZMAX;
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float maxv = -1.0f - BLENDER_ZMAX;
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float value;
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while (p--) {
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value = bc[0];
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if ((value > maxv) && (value <= BLENDER_ZMAX)) {
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maxv = value;
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}
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if ((value < minv) && (value >= -BLENDER_ZMAX)) {
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minv = value;
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}
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bc++;
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}
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minmult->x = minv;
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/* The rare case of flat buffer would cause a divide by 0 */
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minmult->y = ((maxv != minv) ? 1.0f / (maxv - minv) : 0.0f);
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this->m_cachedInstance = minmult;
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}
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unlockMutex();
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return this->m_cachedInstance;
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}
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void NormalizeOperation::deinitializeTileData(rcti * /*rect*/, void * /*data*/)
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{
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/* pass */
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}
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} // namespace blender::compositor
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