e955c94ed3
Listing the "Blender Foundation" as copyright holder implied the Blender Foundation holds copyright to files which may include work from many developers. While keeping copyright on headers makes sense for isolated libraries, Blender's own code may be refactored or moved between files in a way that makes the per file copyright holders less meaningful. Copyright references to the "Blender Foundation" have been replaced with "Blender Authors", with the exception of `./extern/` since these this contains libraries which are more isolated, any changed to license headers there can be handled on a case-by-case basis. Some directories in `./intern/` have also been excluded: - `./intern/cycles/` it's own `AUTHORS` file is planned. - `./intern/opensubdiv/`. An "AUTHORS" file has been added, using the chromium projects authors file as a template. Design task: #110784 Ref !110783.
144 lines
3.5 KiB
C++
144 lines
3.5 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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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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