7a395e2e7f
The last good commit wasf57e4c5b98. After this one more fix was committed, this one is preserved as well:67bd678887.
80 lines
2.4 KiB
C++
80 lines
2.4 KiB
C++
/* SPDX-FileCopyrightText: 2012 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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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->add_input_socket(DataType::Value);
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this->add_output_socket(DataType::Value);
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cached_instance_ = nullptr;
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flags_.can_be_constant = true;
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}
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void NormalizeOperation::deinit_execution()
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{
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delete cached_instance_;
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cached_instance_ = nullptr;
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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::get_area_of_interest(const int /*input_idx*/,
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const rcti & /*output_area*/,
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rcti &r_input_area)
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{
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r_input_area = get_input_operation(0)->get_canvas();
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}
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void NormalizeOperation::update_memory_buffer_started(MemoryBuffer * /*output*/,
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const rcti & /*area*/,
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Span<MemoryBuffer *> inputs)
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{
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if (cached_instance_ == nullptr) {
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MemoryBuffer *input = inputs[0];
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/* Using generic two floats struct to store `x: min`, `y: multiply`. */
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NodeTwoFloats *minmult = new NodeTwoFloats();
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float minv = 1.0f + BLENDER_ZMAX;
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float maxv = -1.0f - BLENDER_ZMAX;
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for (const float *elem : input->as_range()) {
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const float value = *elem;
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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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}
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minmult->x = minv;
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/* The case of a 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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cached_instance_ = minmult;
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}
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}
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void NormalizeOperation::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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NodeTwoFloats *minmult = cached_instance_;
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for (BuffersIterator<float> it = output->iterate_with(inputs, area); !it.is_end(); ++it) {
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const float input_value = *it.in(0);
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*it.out = (input_value - minmult->x) * minmult->y;
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/* Clamp infinities. */
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CLAMP(*it.out, 0.0f, 1.0f);
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}
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}
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} // namespace blender::compositor
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