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Make Servo DPI aware on Windows

Browse source 
This implements system level DPI awareness for Windows. It has three
parts:

1. Add a application manifest which is copied alongside servo.exe during
build that declares our DPI awareness level. This is needed otherwise
DPI queries will return 96dpi and our application will be upscaled on
high DPI displays.

2. Rename hidpi_factor to avoid confusion with Glutin's hidpi_factor
which does something else.

3. Correctly convert windows sizes on window creation for
Windows. Unlike OS X, Windows uses device pixels for window creation.
This commit is contained in:
Jack Moffitt 2016-05-20 16:28:50 -06:00
parent b9650b5dd5
commit 568d454ca6
12 changed files with 111 additions and 46 deletions
Download patch file Download diff file Expand all files Collapse all files

14
components/compositing/compositor.rs
View file

@ -144,7 +144,7 @@ pub struct IOCompositor<Window: WindowMethods> {
page_zoom: ScaleFactor<ViewportPx, ScreenPx, f32>,
/// The device pixel ratio for this window.
hidpi_factor: ScaleFactor<ScreenPx, DevicePixel, f32>,
scale_factor: ScaleFactor<ScreenPx, DevicePixel, f32>,
channel_to_self: Box<CompositorProxy + Send>,
@ -405,7 +405,7 @@ impl<Window: WindowMethods> IOCompositor<Window> {
mem::ProfilerMsg::RegisterReporter(reporter_name(), reporter));
let window_size = window.framebuffer_size();
let hidpi_factor = window.hidpi_factor();
let scale_factor = window.scale_factor();
let composite_target = match opts::get().output_file {
Some(_) => CompositeTarget::PngFile,
None => CompositeTarget::Window
@ -434,7 +434,7 @@ impl<Window: WindowMethods> IOCompositor<Window> {
}),
window_size: window_size,
viewport: None,
hidpi_factor: hidpi_factor,
scale_factor: scale_factor,
channel_to_self: state.sender.clone_compositor_proxy(),
delayed_composition_timer: DelayedCompositionTimerProxy::new(state.sender),
composition_request: CompositionRequest::NoCompositingNecessary,
@ -1315,9 +1315,9 @@ impl<Window: WindowMethods> IOCompositor<Window> {
debug!("compositor resizing to {:?}", new_size.to_untyped());
// A size change could also mean a resolution change.
let new_hidpi_factor = self.window.hidpi_factor();
if self.hidpi_factor != new_hidpi_factor {
self.hidpi_factor = new_hidpi_factor;
let new_scale_factor = self.window.scale_factor();
if self.scale_factor != new_scale_factor {
self.scale_factor = new_scale_factor;
self.update_zoom_transform();
}
@ -1744,7 +1744,7 @@ impl<Window: WindowMethods> IOCompositor<Window> {
Some(device_pixels_per_px) => ScaleFactor::new(device_pixels_per_px),
None => match opts::get().output_file {
Some(_) => ScaleFactor::new(1.0),
None => self.hidpi_factor
None => self.scale_factor
}
}
}