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Support listing available video modes for a monitor (#896)

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* Support listing available video modes for a monitor

* Use derivative for Windows `MonitorHandle`

* Update FEATURES.md

* Fix multiline if statement

* Add documentation for `VideoMode` type
This commit is contained in:
Aleksi Juvani 2019-06-12 21:07:25 +03:00 • committed by Osspial
parent 2b89ddec15
commit 47b5dfa034
13 changed files with 254 additions and 23 deletions
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32
src/platform_impl/linux/x11/util/randr.rs
View file

@ -1,6 +1,7 @@
use std::{env, slice};
use std::str::FromStr;
use monitor::VideoMode;
use dpi::validate_hidpi_factor;
use super::*;
@ -101,7 +102,7 @@ impl XConnection {
&self,
resources: *mut ffi::XRRScreenResources,
repr: &MonitorRepr,
) -> Option<(String, f64)> {
) -> Option<(String, f64, Vec<VideoMode>)> {
let output_info = (self.xrandr.XRRGetOutputInfo)(
self.display,
resources,
@ -114,6 +115,33 @@ impl XConnection {
let _ = self.check_errors(); // discard `BadRROutput` error
return None;
}
let screen = (self.xlib.XDefaultScreen)(self.display);
let bit_depth = (self.xlib.XDefaultDepth)(self.display, screen);
let output_modes =
slice::from_raw_parts((*output_info).modes, (*output_info).nmode as usize);
let resource_modes = slice::from_raw_parts((*resources).modes, (*resources).nmode as usize);
let modes = resource_modes
.iter()
// XRROutputInfo contains an array of mode ids that correspond to
// modes in the array in XRRScreenResources
.filter(|x| output_modes.iter().any(|id| x.id == *id))
.map(|x| {
let refresh_rate = if x.dotClock > 0 && x.hTotal > 0 && x.vTotal > 0 {
x.dotClock as u64 * 1000 / (x.hTotal as u64 * x.vTotal as u64)
} else {
0
};
VideoMode {
dimensions: (x.width, x.height),
refresh_rate: (refresh_rate as f32 / 1000.0).round() as u16,
bit_depth: bit_depth as u16,
}
});
let name_slice = slice::from_raw_parts(
(*output_info).name as *mut u8,
(*output_info).nameLen as usize,
@ -129,6 +157,6 @@ impl XConnection {
};
(self.xrandr.XRRFreeOutputInfo)(output_info);
Some((name, hidpi_factor))
Some((name, hidpi_factor, modes.collect()))
}
}