122 lines
3.4 KiB
C++
122 lines
3.4 KiB
C++
/* SPDX-FileCopyrightText: 2011 Blender Foundation
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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#include "COM_DistanceRGBMatteOperation.h"
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namespace blender::compositor {
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DistanceRGBMatteOperation::DistanceRGBMatteOperation()
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{
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this->add_input_socket(DataType::Color);
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this->add_input_socket(DataType::Color);
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this->add_output_socket(DataType::Value);
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input_image_program_ = nullptr;
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input_key_program_ = nullptr;
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flags_.can_be_constant = true;
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}
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void DistanceRGBMatteOperation::init_execution()
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{
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input_image_program_ = this->get_input_socket_reader(0);
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input_key_program_ = this->get_input_socket_reader(1);
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}
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void DistanceRGBMatteOperation::deinit_execution()
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{
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input_image_program_ = nullptr;
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input_key_program_ = nullptr;
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}
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float DistanceRGBMatteOperation::calculate_distance(const float key[4], const float image[4])
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{
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return len_v3v3(key, image);
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}
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void DistanceRGBMatteOperation::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 in_key[4];
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float in_image[4];
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const float tolerance = settings_->t1;
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const float falloff = settings_->t2;
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float distance;
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float alpha;
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input_key_program_->read_sampled(in_key, x, y, sampler);
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input_image_program_->read_sampled(in_image, x, y, sampler);
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distance = this->calculate_distance(in_key, in_image);
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/* Store matte(alpha) value in [0] to go with
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* COM_SetAlphaMultiplyOperation and the Value output.
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*/
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/* Make 100% transparent. */
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if (distance < tolerance) {
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output[0] = 0.0f;
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}
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/* In the falloff region, make partially transparent. */
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else if (distance < falloff + tolerance) {
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distance = distance - tolerance;
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alpha = distance / falloff;
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/* Only change if more transparent than before. */
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if (alpha < in_image[3]) {
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output[0] = alpha;
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}
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else { /* leave as before */
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output[0] = in_image[3];
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}
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}
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else {
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/* leave as before */
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output[0] = in_image[3];
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}
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}
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void DistanceRGBMatteOperation::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 *in_image = it.in(0);
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const float *in_key = it.in(1);
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float distance = this->calculate_distance(in_key, in_image);
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const float tolerance = settings_->t1;
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const float falloff = settings_->t2;
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/* Store matte(alpha) value in [0] to go with
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* COM_SetAlphaMultiplyOperation and the Value output.
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*/
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/* Make 100% transparent. */
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if (distance < tolerance) {
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it.out[0] = 0.0f;
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}
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/* In the falloff region, make partially transparent. */
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else if (distance < falloff + tolerance) {
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distance = distance - tolerance;
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const float alpha = distance / falloff;
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/* Only change if more transparent than before. */
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if (alpha < in_image[3]) {
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it.out[0] = alpha;
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}
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else { /* Leave as before. */
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it.out[0] = in_image[3];
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}
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}
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else {
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/* Leave as before. */
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it.out[0] = in_image[3];
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}
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}
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}
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} // namespace blender::compositor
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