diff options
Diffstat (limited to 'intern/ghost/intern/GHOST_WindowX11.cpp')
| -rw-r--r-- | intern/ghost/intern/GHOST_WindowX11.cpp | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/intern/ghost/intern/GHOST_WindowX11.cpp b/intern/ghost/intern/GHOST_WindowX11.cpp index 47fbe1256b1..2019f58251f 100644 --- a/intern/ghost/intern/GHOST_WindowX11.cpp +++ b/intern/ghost/intern/GHOST_WindowX11.cpp @@ -56,6 +56,9 @@ # include <X11/extensions/XInput2.h> #endif +//For DPI value +#include <X11/Xresource.h> + #if defined(__sun__) || defined(__sun) || defined(__sparc) || defined(__sparc__) || defined(_AIX) # include <strings.h> #endif @@ -68,6 +71,7 @@ #include <algorithm> #include <string> +#include <math.h> /* For obscure full screen mode stuff * lifted verbatim from blut. */ @@ -1672,3 +1676,44 @@ endFullScreen() const return GHOST_kSuccess; } + +GHOST_TUns16 +GHOST_WindowX11:: +getDPIHint() +{ + /* Try to read DPI setting set using xrdb */ + char* resMan = XResourceManagerString(m_display); + if (resMan) { + XrmDatabase xrdb = XrmGetStringDatabase(resMan); + if (xrdb) { + char* type = NULL; + XrmValue val; + + int success = XrmGetResource(xrdb, "Xft.dpi", "Xft.Dpi", &type, &val); + if (success && type) { + if (strcmp(type, "String") == 0) { + return atoi((char*)val.addr); + } + } + } + } + + /* Fallback to calculating DPI using X reported DPI, set using xrandr --dpi */ + XWindowAttributes attr; + if (!XGetWindowAttributes(m_display, m_window, &attr)) { + /* Failed to get window attributes, return X11 default DPI */ + return 96; + } + + Screen* screen = attr.screen; + int pixelWidth = WidthOfScreen(screen); + int pixelHeight = HeightOfScreen(screen); + int mmWidth = WidthMMOfScreen(screen); + int mmHeight = HeightMMOfScreen(screen); + + double pixelDiagonal = sqrt((pixelWidth * pixelWidth) + (pixelHeight * pixelHeight)); + double mmDiagonal = sqrt((mmWidth * mmWidth) + (mmHeight * mmHeight)); + float inchDiagonal = mmDiagonal * 0.039f; + int dpi = pixelDiagonal / inchDiagonal; + return dpi; +} |