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/*
Copyright (C) 2023-2024 Selwin van Dijk
This file is part of signalbackup-tools.
signalbackup-tools is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
signalbackup-tools is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with signalbackup-tools. If not, see <https://www.gnu.org/licenses/>.
*/
#include "signalbackup.ih"
#include <cmath>
#if __cpp_lib_math_constants >= 201907L
#include <numbers>
#endif
std::pair<std::string, std::string> SignalBackup::getCustomColor(std::pair<std::shared_ptr<unsigned char []>, size_t> const &colordata) const
{
//std::cout << bepaald::bytesToHexString(colordata) << std::endl;
/*
message chatcolor/wallpaper {
message SingleColor {
int32 color = 1;
}
message LinearGradient {
float rotation = 1;
repeated int32 colors = 2;
repeated float positions = 3;
}
message File {
string uri = 1;
}
oneof wallpaper {
SingleColor singleColor = 1;
LinearGradient linearGradient = 2;
File file = 3; // ONLY IN WALLPAPER
}
float dimLevelInDarkTheme = 4; // ONLY IN WALLPAPER
}
*/
ProtoBufParser<
ProtoBufParser<protobuffer::optional::INT32>,
ProtoBufParser<protobuffer::optional::FLOAT, protobuffer::repeated::INT32, protobuffer::repeated::FLOAT>,
ProtoBufParser<protobuffer::optional::STRING>,
protobuffer::optional::FLOAT> color_proto(colordata);
std::pair<std::string, std::string> custom_colors;
if (color_proto.getField<1>().has_value() &&
color_proto.getField<1>().value().getField<1>().has_value())
{
uint32_t c = color_proto.getField<1>().value().getField<1>().value();
//std::cout << "Color value: " << c << std::endl;
//uint8_t a = (c >> (3 * 8)) & 0xFF);
uint8_t r = (c >> (2 * 8)) & 0xFF;
uint8_t g = (c >> (1 * 8)) & 0xFF;
uint8_t b = (c >> (0 * 8)) & 0xFF;
std::stringstream ss;
ss << std::hex << std::setw(2) << std::setfill('0') << static_cast<int>(r)
<< std::hex << std::setw(2) << std::setfill('0') << static_cast<int>(g)
<< std::hex << std::setw(2) << std::setfill('0') << static_cast<int>(b);
custom_colors.first = ss.str();
//std::cout << custom_colors.first << std::endl;
if (color_proto.getField<4>().has_value())
{
double dimfactor = 1 - color_proto.getField<4>().value();
// to HSV
double maxrgb = std::max(r, std::max(g, b));
double minrgb = std::min(r, std::min(g, b));
double v = maxrgb / 255;
double s = (maxrgb > 0) ? 1 - minrgb / maxrgb : 0;
#if __cpp_lib_math_constants >= 201907L
double h = std::acos((r - 0.5 * g - 0.5 * b) / std::sqrt(r * r + g * g + b * b - r * g - r * b - g * b)) * 180 / std::numbers::pi;
#else
double h = std::acos((r - 0.5 * g - 0.5 * b) / std::sqrt(r * r + g * g + b * b - r * g - r * b - g * b)) * 180 / 3.14159265;
#endif
if (b > g)
h = 360 - h;
// apply dimming
v *= dimfactor;
// back to rgb:
maxrgb = 255 * v;
minrgb = maxrgb * (1 - s);
double z = (maxrgb - minrgb) * (1 - std::abs(std::fmod((h / 60), 2) - 1));
std::stringstream ss2;
if (h < 60)
ss2 << std::hex << std::setfill('0') << std::setw(2) << std::lround(maxrgb) // r
<< std::hex << std::setfill('0') << std::setw(2) << std::lround(z + minrgb) // g
<< std::hex << std::setfill('0') << std::setw(2) << std::lround(minrgb); // b
else if (h < 120)
ss2 << std::hex << std::setfill('0') << std::setw(2) << std::lround(z + minrgb) // r
<< std::hex << std::setfill('0') << std::setw(2) << std::lround(maxrgb) // g
<< std::hex << std::setfill('0') << std::setw(2) << std::lround(minrgb); // b
else if (h < 180)
ss2 << std::hex << std::setfill('0') << std::setw(2) << std::lround(minrgb) // r
<< std::hex << std::setfill('0') << std::setw(2) << std::lround(maxrgb) // g
<< std::hex << std::setfill('0') << std::setw(2) << std::lround(z + minrgb); // b
else if (h < 240)
ss2 << std::hex << std::setfill('0') << std::setw(2) << std::lround(minrgb) // r
<< std::hex << std::setfill('0') << std::setw(2) << std::lround(z + minrgb) // g
<< std::hex << std::setfill('0') << std::setw(2) << std::lround(maxrgb); // b
else if (h < 300)
ss2 << std::hex << std::setfill('0') << std::setw(2) << std::lround(z + minrgb) // r
<< std::hex << std::setfill('0') << std::setw(2) << std::lround(minrgb) // g
<< std::hex << std::setfill('0') << std::setw(2) << std::lround(maxrgb); // b
else //if (h < 360)
ss2 << std::hex << std::setfill('0') << std::setw(2) << std::lround(maxrgb) // r
<< std::hex << std::setfill('0') << std::setw(2) << std::lround(minrgb) // g
<< std::hex << std::setfill('0') << std::setw(2) << std::lround(z + minrgb); // b
custom_colors.second = ss2.str();
//std::cout << custom_colors.second << std::endl;
}
}
return custom_colors;
}
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