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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2012 Blender Foundation. */
#include "COM_NormalizeOperation.h"
namespace blender::compositor {
NormalizeOperation::NormalizeOperation()
{
this->add_input_socket(DataType::Value);
this->add_output_socket(DataType::Value);
image_reader_ = nullptr;
cached_instance_ = nullptr;
flags_.complex = true;
flags_.can_be_constant = true;
}
void NormalizeOperation::init_execution()
{
image_reader_ = this->get_input_socket_reader(0);
NodeOperation::init_mutex();
}
void NormalizeOperation::execute_pixel(float output[4], int x, int y, void *data)
{
/* using generic two floats struct to store `x: min`, `y: multiply` */
NodeTwoFloats *minmult = (NodeTwoFloats *)data;
image_reader_->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::deinit_execution()
{
image_reader_ = nullptr;
delete cached_instance_;
cached_instance_ = nullptr;
NodeOperation::deinit_mutex();
}
bool NormalizeOperation::determine_depending_area_of_interest(rcti * /*input*/,
ReadBufferOperation *read_operation,
rcti *output)
{
rcti image_input;
if (cached_instance_) {
return false;
}
NodeOperation *operation = get_input_operation(0);
image_input.xmax = operation->get_width();
image_input.xmin = 0;
image_input.ymax = operation->get_height();
image_input.ymin = 0;
if (operation->determine_depending_area_of_interest(&image_input, read_operation, 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::initialize_tile_data(rcti *rect)
{
lock_mutex();
if (cached_instance_ == nullptr) {
MemoryBuffer *tile = (MemoryBuffer *)image_reader_->initialize_tile_data(rect);
/* using generic two floats struct to store `x: min`, `y: multiply`. */
NodeTwoFloats *minmult = new NodeTwoFloats();
float *buffer = tile->get_buffer();
int p = tile->get_width() * tile->get_height();
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);
cached_instance_ = minmult;
}
unlock_mutex();
return cached_instance_;
}
void NormalizeOperation::deinitialize_tile_data(rcti * /*rect*/, void * /*data*/)
{
/* pass */
}
void NormalizeOperation::get_area_of_interest(const int /*input_idx*/,
const rcti & /*output_area*/,
rcti &r_input_area)
{
r_input_area = get_input_operation(0)->get_canvas();
}
void NormalizeOperation::update_memory_buffer_started(MemoryBuffer * /*output*/,
const rcti & /*area*/,
Span<MemoryBuffer *> inputs)
{
if (cached_instance_ == 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);
cached_instance_ = minmult;
}
}
void NormalizeOperation::update_memory_buffer_partial(MemoryBuffer *output,
const rcti &area,
Span<MemoryBuffer *> inputs)
{
NodeTwoFloats *minmult = cached_instance_;
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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