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LinuxKMS: Add support for synthetic display rotations (#4166)

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This patch adds support for the `SLINT_KMS_ROTATION` environment
variable, that instructs the Skia/FemtoVG renderers to rotate
the scene before rendering.
This commit is contained in:
Simon Hausmann 2023-12-18 17:49:05 +01:00 • committed by GitHub
parent b8ebc084b6
commit 3b51c8e30a
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GPG key ID: 4AEE18F83AFDEB23
11 changed files with 217 additions and 53 deletions
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18
internal/backends/linuxkms/calloop_backend.rs
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@ -78,7 +78,7 @@ pub struct Backend {
&'a crate::DeviceOpener,
) -> Result<
Box<dyn crate::fullscreenwindowadapter::FullscreenRenderer>,
i_slint_core::platform::PlatformError,
PlatformError,
>,
sel_clipboard: RefCell<Option<String>>,
clipboard: RefCell<Option<String>>,
@ -152,10 +152,7 @@ impl Backend {
impl i_slint_core::platform::Platform for Backend {
fn create_window_adapter(
&self,
) -> Result<
std::rc::Rc<dyn i_slint_core::window::WindowAdapter>,
i_slint_core::platform::PlatformError,
> {
) -> Result<std::rc::Rc<dyn i_slint_core::window::WindowAdapter>, PlatformError> {
#[cfg(feature = "libseat")]
let device_accessor = |device: &std::path::Path| -> Result<Arc<dyn AsFd>, PlatformError> {
let device = self
@ -189,8 +186,17 @@ impl i_slint_core::platform::Platform for Backend {
Ok(Arc::new(device))
};
// This could be per-screen, once we support multiple outputs
let rotation =
std::env::var("SLINT_KMS_ROTATION").map_or(Ok(Default::default()), |rot_str| {
rot_str
.as_str()
.try_into()
.map_err(|e| format!("Failed to parse SLINT_KMS_ROTATION: {e}"))
})?;
let renderer = (self.renderer_factory)(&device_accessor)?;
let adapter = FullscreenWindowAdapter::new(renderer)?;
let adapter = FullscreenWindowAdapter::new(renderer, rotation)?;
*self.window.borrow_mut() = Some(adapter.clone());