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#include "display.hpp"
#include <format>
#include <numeric>
#include <string>
namespace Misc
{
std::string getResolutionText(int x, int y)
{
int gcd = std::gcd(x, y);
if (gcd == 0)
return std::string();
int xaspect = x / gcd;
int yaspect = y / gcd;
// It is unclear how to handle 90-degree screen rotation properly.
// So far only swap aspects, apply custom formatting logic and then swap back.
// As result, 1920 x 1200 is displayed as "1200 x 1920 (10:16)"
bool flipped = false;
if (yaspect > xaspect)
{
flipped = true;
std::swap(xaspect, yaspect);
}
// 683:384 (used in 1366 x 768) is usually referred as 16:9
if (xaspect == 683 && yaspect == 384)
{
xaspect = 16;
yaspect = 9;
}
// 85:48 (used in 1360 x 768) is usually referred as 16:9
else if (xaspect == 85 && yaspect == 48)
{
xaspect = 16;
yaspect = 9;
}
// 49:36 (used in 1176 x 864) is usually referred as 4:3
else if (xaspect == 49 && yaspect == 36)
{
xaspect = 4;
yaspect = 3;
}
// 39:29 (used in 624 x 484) is usually referred as 4:3
else if (xaspect == 39 && yaspect == 29)
{
xaspect = 4;
yaspect = 3;
}
// 8:5 (used in 1440 x 900) is usually referred as 16:10
else if (xaspect == 8 && yaspect == 5)
{
xaspect = 16;
yaspect = 10;
}
// 5:3 (used in 1280 x 768) is usually referred as 15:9
else if (xaspect == 5 && yaspect == 3)
{
xaspect = 15;
yaspect = 9;
}
else
{
// everything between 21:9 and 22:9
// is usually referred as 21:9
float ratio = static_cast<float>(xaspect) / yaspect;
if (ratio >= 21 / 9.f && ratio < 22 / 9.f)
{
xaspect = 21;
yaspect = 9;
}
}
if (flipped)
std::swap(xaspect, yaspect);
return std::format("{} × {} ({}:{})", x, y, xaspect, yaspect);
}
}
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