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add dpi function

This commit is contained in:
Adam D. Ruppe 2019-01-08 11:03:53 -05:00
parent 38c84d7fa2
commit baeadebbc4
1 changed files with 23 additions and 0 deletions
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23
simpledisplay.d
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@ -1158,6 +1158,27 @@ string sdpyWindowClass () {
return null;
}
/++
Returns the DPI of the default monitor. [0] is width, [1] is height (they are usually the same though). You may wish to round the numbers off.
+/
float[2] getDpi() {
float[2] dpi;
version(Windows) {
HDC screen = GetDC(null);
dpi[0] = GetDeviceCaps(screen, LOGPIXELSX);
dpi[1] = GetDeviceCaps(screen, LOGPIXELSY);
} else version(X11) {
auto display = XDisplayConnection.get;
auto screen = DefaultScreen(display);
// 25.4 millimeters in an inch...
dpi[0] = cast(float) DisplayWidth(display, screen) / DisplayWidthMM(display, screen) * 25.4;
dpi[1] = cast(float) DisplayHeight(display, screen) / DisplayHeightMM(display, screen) * 25.4;
}
return dpi;
}
TrueColorImage trueColorImageFromNativeHandle(NativeWindowHandle handle, int width, int height) {
throw new Exception("not implemented");
version(none) {
@ -11897,6 +11918,8 @@ struct Visual
int DefaultDepth(Display* dpy, int scr) { return ScreenOfDisplay(dpy, scr).root_depth; }
int DisplayWidth(Display* dpy, int scr) { return ScreenOfDisplay(dpy, scr).width; }
int DisplayHeight(Display* dpy, int scr) { return ScreenOfDisplay(dpy, scr).height; }
int DisplayWidthMM(Display* dpy, int scr) { return ScreenOfDisplay(dpy, scr).mwidth; }
int DisplayHeightMM(Display* dpy, int scr) { return ScreenOfDisplay(dpy, scr).mheight; }
auto DefaultColormap(Display* dpy, int scr) { return ScreenOfDisplay(dpy, scr).cmap; }
int ConnectionNumber(Display* dpy) { return dpy.fd; }