7a395e2e7f
The last good commit wasf57e4c5b98. After this one more fix was committed, this one is preserved as well:67bd678887.
97 lines
2.3 KiB
C++
97 lines
2.3 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_ChannelMatteOperation.h"
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namespace blender::compositor {
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ChannelMatteOperation::ChannelMatteOperation()
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{
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add_input_socket(DataType::Color);
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add_output_socket(DataType::Value);
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flags_.can_be_constant = true;
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}
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void ChannelMatteOperation::init_execution()
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{
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limit_range_ = limit_max_ - limit_min_;
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switch (limit_method_) {
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/* SINGLE */
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case 0: {
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/* 123 / RGB / HSV / YUV / YCC */
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const int matte_channel = matte_channel_ - 1;
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const int limit_channel = limit_channel_ - 1;
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ids_[0] = matte_channel;
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ids_[1] = limit_channel;
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ids_[2] = limit_channel;
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break;
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}
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/* MAX */
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case 1: {
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switch (matte_channel_) {
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case 1: {
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ids_[0] = 0;
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ids_[1] = 1;
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ids_[2] = 2;
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break;
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}
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case 2: {
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ids_[0] = 1;
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ids_[1] = 0;
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ids_[2] = 2;
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break;
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}
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case 3: {
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ids_[0] = 2;
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ids_[1] = 0;
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ids_[2] = 1;
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break;
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}
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default:
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break;
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}
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break;
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}
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default:
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break;
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}
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}
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void ChannelMatteOperation::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 *color = it.in(0);
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/* Matte operation. */
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float alpha = color[ids_[0]] - std::max(color[ids_[1]], color[ids_[2]]);
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/* Flip because 0.0 is transparent, not 1.0. */
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alpha = 1.0f - alpha;
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/* Test range. */
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if (alpha > limit_max_) {
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alpha = color[3]; /* Whatever it was prior. */
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}
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else if (alpha < limit_min_) {
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alpha = 0.0f;
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}
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else { /* Blend. */
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alpha = (alpha - limit_min_) / limit_range_;
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}
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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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/* Don't make something that was more transparent less transparent. */
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*it.out = std::min(alpha, color[3]);
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}
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}
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} // namespace blender::compositor
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