7a395e2e7f
The last good commit wasf57e4c5b98. After this one more fix was committed, this one is preserved as well:67bd678887.
63 lines
1.8 KiB
C++
63 lines
1.8 KiB
C++
/* SPDX-FileCopyrightText: 2011 Blender Authors
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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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flags_.can_be_constant = true;
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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::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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