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
115 lines
3.3 KiB
C++
115 lines
3.3 KiB
C++
/* SPDX-License-Identifier: GPL-2.0-or-later
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* Copyright 2011 Blender Foundation. */
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#include "COM_DifferenceMatteOperation.h"
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namespace blender::compositor {
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DifferenceMatteOperation::DifferenceMatteOperation()
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{
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add_input_socket(DataType::Color);
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add_input_socket(DataType::Color);
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add_output_socket(DataType::Value);
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input_image1_program_ = nullptr;
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input_image2_program_ = nullptr;
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flags_.can_be_constant = true;
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}
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void DifferenceMatteOperation::init_execution()
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{
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input_image1_program_ = this->get_input_socket_reader(0);
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input_image2_program_ = this->get_input_socket_reader(1);
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}
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void DifferenceMatteOperation::deinit_execution()
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{
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input_image1_program_ = nullptr;
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input_image2_program_ = nullptr;
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}
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void DifferenceMatteOperation::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_color1[4];
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float in_color2[4];
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const float tolerance = settings_->t1;
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const float falloff = settings_->t2;
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float difference;
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float alpha;
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input_image1_program_->read_sampled(in_color1, x, y, sampler);
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input_image2_program_->read_sampled(in_color2, x, y, sampler);
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difference = (fabsf(in_color2[0] - in_color1[0]) + fabsf(in_color2[1] - in_color1[1]) +
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fabsf(in_color2[2] - in_color1[2]));
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/* average together the distances */
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difference = difference / 3.0f;
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/* make 100% transparent */
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if (difference <= 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 (difference <= falloff + tolerance) {
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difference = difference - tolerance;
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alpha = difference / falloff;
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/* Only change if more transparent than before. */
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if (alpha < in_color1[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_color1[3];
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}
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}
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else {
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/* foreground object */
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output[0] = in_color1[3];
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}
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}
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void DifferenceMatteOperation::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 *color1 = it.in(0);
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const float *color2 = it.in(1);
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float difference = (fabsf(color2[0] - color1[0]) + fabsf(color2[1] - color1[1]) +
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fabsf(color2[2] - color1[2]));
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/* Average together the distances. */
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difference = difference / 3.0f;
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const float tolerance = settings_->t1;
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const float falloff = settings_->t2;
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/* Make 100% transparent. */
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if (difference <= 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 (difference <= falloff + tolerance) {
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difference = difference - tolerance;
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const float alpha = difference / falloff;
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/* Only change if more transparent than before. */
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if (alpha < color1[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] = color1[3];
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}
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}
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else {
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/* Foreground object. */
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it.out[0] = color1[3];
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}
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}
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}
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} // namespace blender::compositor
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