148 lines
4.3 KiB
C++
148 lines
4.3 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_MapRangeOperation.h"
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namespace blender::compositor {
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MapRangeOperation::MapRangeOperation()
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{
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this->add_input_socket(DataType::Value);
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this->add_input_socket(DataType::Value);
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this->add_input_socket(DataType::Value);
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this->add_input_socket(DataType::Value);
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this->add_input_socket(DataType::Value);
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this->add_output_socket(DataType::Value);
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input_operation_ = nullptr;
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use_clamp_ = false;
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flags_.can_be_constant = true;
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}
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void MapRangeOperation::init_execution()
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{
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input_operation_ = this->get_input_socket_reader(0);
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source_min_operation_ = this->get_input_socket_reader(1);
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source_max_operation_ = this->get_input_socket_reader(2);
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dest_min_operation_ = this->get_input_socket_reader(3);
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dest_max_operation_ = this->get_input_socket_reader(4);
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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 MapRangeOperation::execute_pixel_sampled(float output[4],
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float x,
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float y,
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PixelSampler sampler)
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{
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float inputs[8]; /* includes the 5 inputs + 3 pads */
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float value;
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float source_min, source_max;
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float dest_min, dest_max;
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input_operation_->read_sampled(inputs, x, y, sampler);
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source_min_operation_->read_sampled(inputs + 1, x, y, sampler);
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source_max_operation_->read_sampled(inputs + 2, x, y, sampler);
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dest_min_operation_->read_sampled(inputs + 3, x, y, sampler);
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dest_max_operation_->read_sampled(inputs + 4, x, y, sampler);
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value = inputs[0];
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source_min = inputs[1];
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source_max = inputs[2];
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dest_min = inputs[3];
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dest_max = inputs[4];
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if (fabsf(source_max - source_min) < 1e-6f) {
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output[0] = 0.0f;
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return;
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}
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if (value >= -BLENDER_ZMAX && value <= BLENDER_ZMAX) {
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value = (value - source_min) / (source_max - source_min);
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value = dest_min + value * (dest_max - dest_min);
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}
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else if (value > BLENDER_ZMAX) {
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value = dest_max;
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}
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else {
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value = dest_min;
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}
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if (use_clamp_) {
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if (dest_max > dest_min) {
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CLAMP(value, dest_min, dest_max);
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}
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else {
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CLAMP(value, dest_max, dest_min);
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}
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}
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output[0] = value;
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}
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void MapRangeOperation::deinit_execution()
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{
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input_operation_ = nullptr;
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source_min_operation_ = nullptr;
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source_max_operation_ = nullptr;
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dest_min_operation_ = nullptr;
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dest_max_operation_ = nullptr;
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}
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void MapRangeOperation::update_memory_buffer_partial(MemoryBuffer *output,
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const rcti &area,
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Span<MemoryBuffer *> inputs)
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{
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for (BuffersIterator<float> it = output->iterate_with(inputs, area); !it.is_end(); ++it) {
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const float source_min = *it.in(1);
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const float source_max = *it.in(2);
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if (fabsf(source_max - source_min) < 1e-6f) {
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it.out[0] = 0.0f;
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continue;
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}
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float value = *it.in(0);
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const float dest_min = *it.in(3);
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const float dest_max = *it.in(4);
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if (value >= -BLENDER_ZMAX && value <= BLENDER_ZMAX) {
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value = (value - source_min) / (source_max - source_min);
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value = dest_min + value * (dest_max - dest_min);
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}
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else if (value > BLENDER_ZMAX) {
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value = dest_max;
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}
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else {
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value = dest_min;
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}
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if (use_clamp_) {
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if (dest_max > dest_min) {
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CLAMP(value, dest_min, dest_max);
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}
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else {
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CLAMP(value, dest_max, dest_min);
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}
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}
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it.out[0] = value;
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}
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}
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} // namespace blender::compositor
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