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https://github.com/portapack-mayhem/mayhem-firmware.git
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Synray
245a36459f
* Fix BLE RX RSSI and Channel scale * Properly reset gradient index 0 * Use move constructor in MenuView::add_item * Avoid erasing during iteration * Fix gradient rounding. Extend to end of table * Add comment to add_item
103 lines
2.8 KiB
C++
103 lines
2.8 KiB
C++
/*
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* Copyright (C) 2025 Belousov Oleg
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*
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* This file is part of PortaPack.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#include "gradient.hpp"
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#include "convert.hpp"
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#include "file_reader.hpp"
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namespace fs = std::filesystem;
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const std::filesystem::path default_gradient_file = u"waterfall.txt";
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Gradient::Gradient() {
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step(0, 0, 0, 0);
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}
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void Gradient::set_default() {
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step(0, 0, 0, 0);
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step(86, 0, 0, 255);
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step(171, 0, 255, 0);
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step(255, 255, 0, 0);
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}
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bool Gradient::load_file(const std::filesystem::path& file_path) {
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File gradient_file;
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auto error = gradient_file.open(file_path.string());
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if (error)
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return false;
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// make sure the table starts at 0
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step(0, 0, 0, 0);
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auto reader = FileLineReader(gradient_file);
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for (const auto& line : reader) {
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if (line.length() == 0 || line[0] == '#')
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continue; // Empty or comment line.
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auto cols = split_string(line, ',');
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if (cols.size() == 4) {
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int16_t index, r, g, b;
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if (!parse_int(cols[0], index) || index < 0 || index > 255)
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continue;
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if (!parse_int(cols[1], r) || r < 0 || r > 255)
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continue;
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if (!parse_int(cols[2], g) || g < 0 || g > 255)
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continue;
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if (!parse_int(cols[3], b) || b < 0 || b > 255)
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continue;
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step(index, r, g, b);
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}
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}
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// extend the gradient from the current index to the end of the table
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step(255, prev_r, prev_g, prev_b);
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return true;
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}
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void Gradient::step(int16_t index, int16_t r, int16_t g, int16_t b) {
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// prevent division by 0 if index == prev_index
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int16_t range = index - prev_index;
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if (range == 0) range = 1;
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for (int16_t i = prev_index; i <= index; i++) {
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int16_t t = i - prev_index;
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int16_t new_r = prev_r + (t * (r - prev_r) + range / 2) / range;
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int16_t new_g = prev_g + (t * (g - prev_g) + range / 2) / range;
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int16_t new_b = prev_b + (t * (b - prev_b) + range / 2) / range;
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if (i <= 255) lut[i] = ui::Color(new_r, new_g, new_b);
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}
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prev_index = index;
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prev_r = r;
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prev_g = g;
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prev_b = b;
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}
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