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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2012 Blender Foundation. */
#include "COM_MapRangeOperation.h"
namespace blender::compositor {
MapRangeOperation::MapRangeOperation()
{
this->add_input_socket(DataType::Value);
this->add_input_socket(DataType::Value);
this->add_input_socket(DataType::Value);
this->add_input_socket(DataType::Value);
this->add_input_socket(DataType::Value);
this->add_output_socket(DataType::Value);
input_operation_ = nullptr;
use_clamp_ = false;
flags_.can_be_constant = true;
}
void MapRangeOperation::init_execution()
{
input_operation_ = this->get_input_socket_reader(0);
source_min_operation_ = this->get_input_socket_reader(1);
source_max_operation_ = this->get_input_socket_reader(2);
dest_min_operation_ = this->get_input_socket_reader(3);
dest_max_operation_ = this->get_input_socket_reader(4);
}
/* The code below assumes all data is inside range +- this, and that input buffer is single channel
*/
#define BLENDER_ZMAX 10000.0f
void MapRangeOperation::execute_pixel_sampled(float output[4],
float x,
float y,
PixelSampler sampler)
{
float inputs[8]; /* includes the 5 inputs + 3 pads */
float value;
float source_min, source_max;
float dest_min, dest_max;
input_operation_->read_sampled(inputs, x, y, sampler);
source_min_operation_->read_sampled(inputs + 1, x, y, sampler);
source_max_operation_->read_sampled(inputs + 2, x, y, sampler);
dest_min_operation_->read_sampled(inputs + 3, x, y, sampler);
dest_max_operation_->read_sampled(inputs + 4, x, y, sampler);
value = inputs[0];
source_min = inputs[1];
source_max = inputs[2];
dest_min = inputs[3];
dest_max = inputs[4];
if (fabsf(source_max - source_min) < 1e-6f) {
output[0] = 0.0f;
return;
}
if (value >= -BLENDER_ZMAX && value <= BLENDER_ZMAX) {
value = (value - source_min) / (source_max - source_min);
value = dest_min + value * (dest_max - dest_min);
}
else if (value > BLENDER_ZMAX) {
value = dest_max;
}
else {
value = dest_min;
}
if (use_clamp_) {
if (dest_max > dest_min) {
CLAMP(value, dest_min, dest_max);
}
else {
CLAMP(value, dest_max, dest_min);
}
}
output[0] = value;
}
void MapRangeOperation::deinit_execution()
{
input_operation_ = nullptr;
source_min_operation_ = nullptr;
source_max_operation_ = nullptr;
dest_min_operation_ = nullptr;
dest_max_operation_ = nullptr;
}
void MapRangeOperation::update_memory_buffer_partial(MemoryBuffer *output,
const rcti &area,
Span<MemoryBuffer *> inputs)
{
for (BuffersIterator<float> it = output->iterate_with(inputs, area); !it.is_end(); ++it) {
const float source_min = *it.in(1);
const float source_max = *it.in(2);
if (fabsf(source_max - source_min) < 1e-6f) {
it.out[0] = 0.0f;
continue;
}
float value = *it.in(0);
const float dest_min = *it.in(3);
const float dest_max = *it.in(4);
if (value >= -BLENDER_ZMAX && value <= BLENDER_ZMAX) {
value = (value - source_min) / (source_max - source_min);
value = dest_min + value * (dest_max - dest_min);
}
else if (value > BLENDER_ZMAX) {
value = dest_max;
}
else {
value = dest_min;
}
if (use_clamp_) {
if (dest_max > dest_min) {
CLAMP(value, dest_min, dest_max);
}
else {
CLAMP(value, dest_max, dest_min);
}
}
it.out[0] = value;
}
}
} // namespace blender::compositor
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