2f060706a4
Include counts of some headers while making full blender build: - BLI_color.hh 1771 -> 1718 - BLI_math_color.h 1828 -> 1783 - BLI_math_vector.hh 496 -> 405 - BLI_index_mask.hh 1341 -> 1267 - BLI_task.hh 958 -> 903 - BLI_generic_virtual_array.hh 509 -> 435 - IMB_colormanagement.h 437 -> 130 - GPU_texture.h 806 -> 780 - FN_multi_function.hh 331 -> 257 Note: DNA_node_tree_interface_types.h needs color include only for the currently unused (but soon to be used) socket_color function. Future step is to figure out how to include DNA_node_tree_interface_types.h less. Pull Request: #111113
129 lines
3.6 KiB
C++
129 lines
3.6 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_BrightnessOperation.h"
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#include "BLI_math_color.h"
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namespace blender::compositor {
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BrightnessOperation::BrightnessOperation()
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{
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this->add_input_socket(DataType::Color);
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this->add_input_socket(DataType::Value);
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this->add_input_socket(DataType::Value);
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this->add_output_socket(DataType::Color);
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input_program_ = nullptr;
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use_premultiply_ = false;
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flags_.can_be_constant = true;
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}
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void BrightnessOperation::set_use_premultiply(bool use_premultiply)
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{
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use_premultiply_ = use_premultiply;
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}
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void BrightnessOperation::init_execution()
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{
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input_program_ = this->get_input_socket_reader(0);
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input_brightness_program_ = this->get_input_socket_reader(1);
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input_contrast_program_ = this->get_input_socket_reader(2);
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}
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void BrightnessOperation::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 input_value[4];
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float a, b;
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float input_brightness[4];
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float input_contrast[4];
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input_program_->read_sampled(input_value, x, y, sampler);
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input_brightness_program_->read_sampled(input_brightness, x, y, sampler);
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input_contrast_program_->read_sampled(input_contrast, x, y, sampler);
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float brightness = input_brightness[0];
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float contrast = input_contrast[0];
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brightness /= 100.0f;
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float delta = contrast / 200.0f;
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/*
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* The algorithm is by Werner D. Streidt
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* (http://visca.com/ffactory/archives/5-99/msg00021.html)
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* Extracted of OpenCV `demhist.c`.
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*/
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if (contrast > 0) {
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a = 1.0f - delta * 2.0f;
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a = 1.0f / max_ff(a, FLT_EPSILON);
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b = a * (brightness - delta);
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}
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else {
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delta *= -1;
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a = max_ff(1.0f - delta * 2.0f, 0.0f);
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b = a * brightness + delta;
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}
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if (use_premultiply_) {
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premul_to_straight_v4(input_value);
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}
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output[0] = a * input_value[0] + b;
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output[1] = a * input_value[1] + b;
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output[2] = a * input_value[2] + b;
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output[3] = input_value[3];
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if (use_premultiply_) {
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straight_to_premul_v4(output);
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}
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}
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void BrightnessOperation::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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float tmp_color[4];
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for (BuffersIterator<float> it = output->iterate_with(inputs, area); !it.is_end(); ++it) {
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const float *in_color = it.in(0);
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const float brightness = *it.in(1) / 100.0f;
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const float contrast = *it.in(2);
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float delta = contrast / 200.0f;
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/*
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* The algorithm is by Werner D. Streidt
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* (http://visca.com/ffactory/archives/5-99/msg00021.html)
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* Extracted of OpenCV `demhist.c`.
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*/
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float a, b;
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if (contrast > 0) {
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a = 1.0f - delta * 2.0f;
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a = 1.0f / max_ff(a, FLT_EPSILON);
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b = a * (brightness - delta);
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}
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else {
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delta *= -1;
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a = max_ff(1.0f - delta * 2.0f, 0.0f);
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b = a * brightness + delta;
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}
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const float *color;
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if (use_premultiply_) {
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premul_to_straight_v4_v4(tmp_color, in_color);
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color = tmp_color;
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}
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else {
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color = in_color;
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}
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it.out[0] = a * color[0] + b;
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it.out[1] = a * color[1] + b;
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it.out[2] = a * color[2] + b;
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it.out[3] = color[3];
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if (use_premultiply_) {
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straight_to_premul_v4(it.out);
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}
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}
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}
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void BrightnessOperation::deinit_execution()
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{
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input_program_ = nullptr;
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input_brightness_program_ = nullptr;
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input_contrast_program_ = nullptr;
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}
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} // namespace blender::compositor
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