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.
116 lines
3.3 KiB
C++
116 lines
3.3 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_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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