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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 2012, Blender Foundation.
*/
#include "COM_NormalizeOperation.h"
namespace blender::compositor {
NormalizeOperation::NormalizeOperation()
{
this->addInputSocket(DataType::Value);
this->addOutputSocket(DataType::Value);
this->m_imageReader = nullptr;
this->m_cachedInstance = nullptr;
this->flags.complex = true;
flags.can_be_constant = true;
}
void NormalizeOperation::initExecution()
{
this->m_imageReader = this->getInputSocketReader(0);
NodeOperation::initMutex();
}
void NormalizeOperation::executePixel(float output[4], int x, int y, void *data)
{
/* using generic two floats struct to store `x: min`, `y: multiply` */
NodeTwoFloats *minmult = (NodeTwoFloats *)data;
this->m_imageReader->read(output, x, y, nullptr);
output[0] = (output[0] - minmult->x) * minmult->y;
/* clamp infinities */
if (output[0] > 1.0f) {
output[0] = 1.0f;
}
else if (output[0] < 0.0f) {
output[0] = 0.0f;
}
}
void NormalizeOperation::deinitExecution()
{
this->m_imageReader = nullptr;
delete this->m_cachedInstance;
m_cachedInstance = nullptr;
NodeOperation::deinitMutex();
}
bool NormalizeOperation::determineDependingAreaOfInterest(rcti * /*input*/,
ReadBufferOperation *readOperation,
rcti *output)
{
rcti imageInput;
if (this->m_cachedInstance) {
return false;
}
NodeOperation *operation = getInputOperation(0);
imageInput.xmax = operation->getWidth();
imageInput.xmin = 0;
imageInput.ymax = operation->getHeight();
imageInput.ymin = 0;
if (operation->determineDependingAreaOfInterest(&imageInput, readOperation, output)) {
return true;
}
return false;
}
/* The code below assumes all data is inside range +- this, and that input buffer is single channel
*/
#define BLENDER_ZMAX 10000.0f
void *NormalizeOperation::initializeTileData(rcti *rect)
{
lockMutex();
if (this->m_cachedInstance == nullptr) {
MemoryBuffer *tile = (MemoryBuffer *)this->m_imageReader->initializeTileData(rect);
/* using generic two floats struct to store `x: min`, `y: multiply`. */
NodeTwoFloats *minmult = new NodeTwoFloats();
float *buffer = tile->getBuffer();
int p = tile->getWidth() * tile->getHeight();
float *bc = buffer;
float minv = 1.0f + BLENDER_ZMAX;
float maxv = -1.0f - BLENDER_ZMAX;
float value;
while (p--) {
value = bc[0];
if ((value > maxv) && (value <= BLENDER_ZMAX)) {
maxv = value;
}
if ((value < minv) && (value >= -BLENDER_ZMAX)) {
minv = value;
}
bc++;
}
minmult->x = minv;
/* The rare case of flat buffer would cause a divide by 0 */
minmult->y = ((maxv != minv) ? 1.0f / (maxv - minv) : 0.0f);
this->m_cachedInstance = minmult;
}
unlockMutex();
return this->m_cachedInstance;
}
void NormalizeOperation::deinitializeTileData(rcti * /*rect*/, void * /*data*/)
{
/* pass */
}
void NormalizeOperation::get_area_of_interest(const int UNUSED(input_idx),
const rcti &UNUSED(output_area),
rcti &r_input_area)
{
NodeOperation *input = get_input_operation(0);
r_input_area.xmin = 0;
r_input_area.xmax = input->getWidth();
r_input_area.ymin = 0;
r_input_area.ymax = input->getHeight();
}
void NormalizeOperation::update_memory_buffer_started(MemoryBuffer *UNUSED(output),
const rcti &UNUSED(area),
Span<MemoryBuffer *> inputs)
{
if (m_cachedInstance == nullptr) {
MemoryBuffer *input = inputs[0];
/* Using generic two floats struct to store `x: min`, `y: multiply`. */
NodeTwoFloats *minmult = new NodeTwoFloats();
float minv = 1.0f + BLENDER_ZMAX;
float maxv = -1.0f - BLENDER_ZMAX;
for (const float *elem : input->as_range()) {
const float value = *elem;
if ((value > maxv) && (value <= BLENDER_ZMAX)) {
maxv = value;
}
if ((value < minv) && (value >= -BLENDER_ZMAX)) {
minv = value;
}
}
minmult->x = minv;
/* The case of a flat buffer would cause a divide by 0. */
minmult->y = ((maxv != minv) ? 1.0f / (maxv - minv) : 0.0f);
m_cachedInstance = minmult;
}
}
void NormalizeOperation::update_memory_buffer_partial(MemoryBuffer *output,
const rcti &area,
Span<MemoryBuffer *> inputs)
{
NodeTwoFloats *minmult = m_cachedInstance;
for (BuffersIterator<float> it = output->iterate_with(inputs, area); !it.is_end(); ++it) {
const float input_value = *it.in(0);
*it.out = (input_value - minmult->x) * minmult->y;
/* Clamp infinities. */
CLAMP(*it.out, 0.0f, 1.0f);
}
}
} // namespace blender::compositor
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