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Set DPI awareness for chromium_subp to "System Aware" #42

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Nov 13, 2023
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Set DPI awareness for chromium_subp to "System Aware" #42

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12 changes: 12 additions & 0 deletions native/chromium_subp/src/bin/chromium_subp.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,18 @@ use std::os::raw::c_int;
use std::ptr::null_mut;

fn main() {
// Disable High DPI per Monitor support.
// By default Chromium enables the "PerMonitorV2" strategy for high DPI awareness. However SWT does not yet support
// "PerMonitorV2", but only "System" DPI awareness. Mismatching DPI awareness between the render process (chromium)
// and the host process (swt/java) causes strange visual artifacts.
//
// Thus set "System" DPI awareness here, to override Chromiums default to match SWT.
unsafe {
winapi::um::winuser::SetProcessDpiAwarenessContext(
winapi::shared::windef::DPI_AWARENESS_CONTEXT_SYSTEM_AWARE,
);
}

let main_args = chromium::utils::prepare_args();
let mut app = app::App::new();
let exit_code: c_int =
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