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
102 lines
2.8 KiB
C++
102 lines
2.8 KiB
C++
/* SPDX-License-Identifier: GPL-2.0-or-later
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* Copyright 2011 Blender Foundation. */
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#include "COM_LuminanceMatteOperation.h"
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#include "IMB_colormanagement.h"
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namespace blender::compositor {
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LuminanceMatteOperation::LuminanceMatteOperation()
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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 LuminanceMatteOperation::init_execution()
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{
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input_image_program_ = this->get_input_socket_reader(0);
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}
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void LuminanceMatteOperation::deinit_execution()
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{
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input_image_program_ = nullptr;
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}
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void LuminanceMatteOperation::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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input_image_program_->read_sampled(in_color, x, y, sampler);
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const float high = settings_->t1;
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const float low = settings_->t2;
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const float luminance = IMB_colormanagement_get_luminance(in_color);
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float alpha;
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/* one line thread-friend algorithm:
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* output[0] = MIN2(input_value[3], MIN2(1.0f, MAX2(0.0f, ((luminance - low) / (high - low))));
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*/
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/* test range */
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if (luminance > high) {
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alpha = 1.0f;
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}
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else if (luminance < low) {
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alpha = 0.0f;
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}
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else { /* Blend. */
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alpha = (luminance - low) / (high - low);
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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] = min_ff(alpha, in_color[3]);
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}
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void LuminanceMatteOperation::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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const float luminance = IMB_colormanagement_get_luminance(color);
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/* One line thread-friend algorithm:
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* `it.out[0] = MIN2(color[3], MIN2(1.0f, MAX2(0.0f, ((luminance - low) / (high - low))));`
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*/
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/* Test range. */
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const float high = settings_->t1;
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const float low = settings_->t2;
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float alpha;
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if (luminance > high) {
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alpha = 1.0f;
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}
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else if (luminance < low) {
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alpha = 0.0f;
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}
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else { /* Blend. */
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alpha = (luminance - low) / (high - low);
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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[0] = MIN2(alpha, color[3]);
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}
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}
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} // namespace blender::compositor
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