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fix dpi calculation for Linux and multiple screens

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This commit is contained in:
nothingTVatYT
2021-10-18 00:38:08 +02:00
parent 7660ef59ff
commit 78eab24c68
1 changed files with 5 additions and 3 deletions
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8
Source/Engine/Platform/Linux/LinuxPlatform.cpp
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@@ -836,13 +836,15 @@ int X11ErrorHandler(X11::Display* display, X11::XErrorEvent* event)
int32 CalculateDpi()
{
Vector2 size = Platform::GetDesktopSize();
//Vector2 size = Platform::GetDesktopSize();
// in X11 a screen is not necessarily identical to a desktop
// so we need to stick to one type for pixel and physical size query
int screenIdx = 0;
int widthMM = X11_DisplayWidthMM(xDisplay, screenIdx);
int heightMM = X11_DisplayHeightMM(xDisplay, screenIdx);
double xdpi = (widthMM ? size.X / (double)widthMM * 25.4 : 0);
double ydpi = (heightMM ? size.Y / (double)heightMM * 25.4 : 0);
double xdpi = (widthMM ? X11_DisplayWidth(xDisplay, screenIdx) / (double)widthMM * 25.4 : 0);
double ydpi = (heightMM ? X11_DisplayHeight(xDisplay, screenIdx) / (double)heightMM * 25.4 : 0);
if (xdpi || ydpi)
return (int32)Math::Ceil((xdpi + ydpi) / (xdpi && ydpi ? 2 : 1));