Campbell Barton
c434782e3a
Use a shorter/simpler license convention, stops the header taking so much space. Follow the SPDX license specification: https://spdx.org/licenses - C/C++/objc/objc++ - Python - Shell Scripts - CMake, GNUmakefile While most of the source tree has been included - `./extern/` was left out. - `./intern/cycles` & `./intern/atomic` are also excluded because they use different header conventions. doc/license/SPDX-license-identifiers.txt has been added to list SPDX all used identifiers. See P2788 for the script that automated these edits. Reviewed By: brecht, mont29, sergey Ref D14069
143 lines
3.5 KiB
C++
143 lines
3.5 KiB
C++
/* SPDX-License-Identifier: GPL-2.0-or-later
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* Copyright 2012 Blender Foundation. */
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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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input_image_program_ = nullptr;
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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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input_image_program_ = this->get_input_socket_reader(0);
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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::deinit_execution()
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{
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input_image_program_ = nullptr;
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}
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void ChannelMatteOperation::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_color[4];
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float alpha;
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const float limit_max = limit_max_;
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const float limit_min = limit_min_;
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const float limit_range = limit_range_;
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input_image_program_->read_sampled(in_color, x, y, sampler);
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/* matte operation */
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alpha = in_color[ids_[0]] - MAX2(in_color[ids_[1]], in_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 = in_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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output[0] = MIN2(alpha, in_color[3]);
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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]] - MAX2(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 = MIN2(alpha, color[3]);
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}
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}
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} // namespace blender::compositor
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