common: add fallback device/surface types
This commit is contained in:
Victor Brekenfeld
parent
35943fc56a
commit
df951b5de7
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@ -0,0 +1,347 @@
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//!
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//! Types to make fallback device initialization easier
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//!
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#[cfg(all(feature = "backend_drm_atomic", feature = "backend_drm_legacy"))]
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use crate::backend::drm::{atomic::AtomicDrmDevice, legacy::LegacyDrmDevice};
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use crate::backend::drm::{common::Error, Device, DeviceHandler, RawDevice, RawSurface, Surface};
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use crate::backend::egl::Error as EGLError;
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#[cfg(feature = "use_system_lib")]
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use crate::backend::egl::{display::EGLBufferReader, EGLGraphicsBackend};
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#[cfg(feature = "renderer_gl")]
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use crate::backend::graphics::gl::GLGraphicsBackend;
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#[cfg(feature = "renderer_gl")]
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use crate::backend::graphics::PixelFormat;
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use crate::backend::graphics::{CursorBackend, SwapBuffersError};
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use crate::backend::session::{AsSessionObserver, SessionObserver};
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use drm::{
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control::{connector, crtc, encoder, framebuffer, plane, Device as ControlDevice, Mode, ResourceHandles},
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Device as BasicDevice, SystemError as DrmError,
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};
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#[cfg(feature = "renderer_gl")]
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use nix::libc::c_void;
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use nix::libc::dev_t;
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use std::os::unix::io::{AsRawFd, RawFd};
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#[cfg(feature = "use_system_lib")]
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use wayland_server::Display;
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/// [`Device`](::backend::drm::Device) Wrapper to assist fallback
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/// in case initialization of the preferred device type fails.
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pub enum FallbackDevice<D1: Device + 'static, D2: Device + 'static> {
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/// Variant for successful initialization of the preferred device
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Preference(D1),
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/// Variant for the fallback device
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Fallback(D2),
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}
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struct FallbackDeviceHandlerD1<E, C, S1, S2, D1, D2>(
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Box<dyn DeviceHandler<Device = FallbackDevice<D1, D2>> + 'static>,
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)
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where
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E: std::error::Error + Send + 'static,
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C: IntoIterator<Item = connector::Handle> + 'static,
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S1: Surface<Error = E, Connectors = C> + 'static,
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S2: Surface<Error = E, Connectors = C> + 'static,
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D1: Device<Surface = S1> + 'static,
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D2: Device<Surface = S2> + 'static;
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impl<E, C, S1, S2, D1, D2> DeviceHandler for FallbackDeviceHandlerD1<E, C, S1, S2, D1, D2>
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where
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E: std::error::Error + Send + 'static,
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C: IntoIterator<Item = connector::Handle> + 'static,
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S1: Surface<Error = E, Connectors = C> + 'static,
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S2: Surface<Error = E, Connectors = C> + 'static,
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D1: Device<Surface = S1> + 'static,
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D2: Device<Surface = S2> + 'static,
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{
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type Device = D1;
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fn vblank(&mut self, crtc: crtc::Handle) {
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self.0.vblank(crtc)
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}
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fn error(&mut self, error: E) {
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self.0.error(error);
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}
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}
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struct FallbackDeviceHandlerD2<E, C, S1, S2, D1, D2>(
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Box<dyn DeviceHandler<Device = FallbackDevice<D1, D2>> + 'static>,
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)
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where
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E: std::error::Error + Send + 'static,
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C: IntoIterator<Item = connector::Handle> + 'static,
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S1: Surface<Error = E, Connectors = C> + 'static,
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S2: Surface<Error = E, Connectors = C> + 'static,
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D1: Device<Surface = S1> + 'static,
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D2: Device<Surface = S2> + 'static;
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impl<E, C, S1, S2, D1, D2> DeviceHandler for FallbackDeviceHandlerD2<E, C, S1, S2, D1, D2>
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where
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E: std::error::Error + Send + 'static,
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C: IntoIterator<Item = connector::Handle> + 'static,
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S1: Surface<Error = E, Connectors = C> + 'static,
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S2: Surface<Error = E, Connectors = C> + 'static,
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D1: Device<Surface = S1> + 'static,
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D2: Device<Surface = S2> + 'static,
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{
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type Device = D2;
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fn vblank(&mut self, crtc: crtc::Handle) {
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self.0.vblank(crtc)
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}
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fn error(&mut self, error: E) {
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self.0.error(error);
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}
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}
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/// [`SessionObserver`](::backend::session::SessionObserver) Wrapper to assist fallback
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/// in case initialization of the preferred device type fails.
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pub enum FallbackDeviceObserver<O1: SessionObserver + 'static, O2: SessionObserver + 'static> {
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/// Variant for successful initialization of the preferred device
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Preference(O1),
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/// Variant for the fallback device
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Fallback(O2),
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}
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impl<O1, O2, D1, D2> AsSessionObserver<FallbackDeviceObserver<O1, O2>> for FallbackDevice<D1, D2>
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where
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O1: SessionObserver + 'static,
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O2: SessionObserver + 'static,
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D1: Device + AsSessionObserver<O1> + 'static,
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D2: Device + AsSessionObserver<O2> + 'static,
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{
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fn observer(&mut self) -> FallbackDeviceObserver<O1, O2> {
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match self {
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FallbackDevice::Preference(dev) => FallbackDeviceObserver::Preference(dev.observer()),
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FallbackDevice::Fallback(dev) => FallbackDeviceObserver::Fallback(dev.observer()),
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}
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}
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}
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impl<O1: SessionObserver + 'static, O2: SessionObserver + 'static> SessionObserver
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for FallbackDeviceObserver<O1, O2>
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{
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fn pause(&mut self, device: Option<(u32, u32)>) {
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match self {
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FallbackDeviceObserver::Preference(dev) => dev.pause(device),
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FallbackDeviceObserver::Fallback(dev) => dev.pause(device),
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}
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}
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fn activate(&mut self, device: Option<(u32, u32, Option<RawFd>)>) {
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match self {
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FallbackDeviceObserver::Preference(dev) => dev.activate(device),
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FallbackDeviceObserver::Fallback(dev) => dev.activate(device),
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}
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}
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}
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/// [`Surface`](::backend::drm::Surface) Wrapper to assist fallback
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/// in case initialization of the preferred device type fails.
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pub enum FallbackSurface<S1: Surface, S2: Surface> {
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/// Variant for successful initialization of the preferred device
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Preference(S1),
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/// Variant for the fallback device
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Fallback(S2),
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}
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#[cfg(all(feature = "backend_drm_atomic", feature = "backend_drm_legacy"))]
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impl<A: AsRawFd + Clone + 'static> FallbackDevice<AtomicDrmDevice<A>, LegacyDrmDevice<A>> {
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/// Try to initialize an [`AtomicDrmDevice`](::backend::drm:;atomic::AtomicDrmDevice)
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/// and fall back to a [`LegacyDrmDevice`] if atomic-modesetting is not supported.
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pub fn new<L>(fd: A, logger: L) -> Result<Self, Error>
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where
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L: Into<Option<::slog::Logger>>,
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{
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let log = crate::slog_or_stdlog(logger).new(o!("smithay_module" => "backend_drm_fallback"));
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info!(log, "Trying to initialize AtomicDrmDevice");
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match AtomicDrmDevice::new(fd.clone(), log.clone()) {
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Ok(dev) => Ok(FallbackDevice::Preference(dev)),
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Err(err) => {
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error!(log, "Failed to initialize preferred AtomicDrmDevice: {}", err);
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info!(log, "Falling back to fallback LegacyyDrmDevice");
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Ok(FallbackDevice::Fallback(LegacyDrmDevice::new(fd, log)?))
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}
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}
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}
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}
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macro_rules! fallback_device_impl {
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($func_name:ident, $self:ty, $return:ty, $($arg_name:ident : $arg_ty:ty),*) => {
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fn $func_name(self: $self, $($arg_name : $arg_ty),*) -> $return {
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match self {
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FallbackDevice::Preference(dev) => dev.$func_name($($arg_name),*),
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FallbackDevice::Fallback(dev) => dev.$func_name($($arg_name),*),
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}
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}
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};
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($func_name:ident, $self:ty, $return:ty) => {
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fallback_device_impl!($func_name, $self, $return,);
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};
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($func_name:ident, $self:ty) => {
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fallback_device_impl!($func_name, $self, ());
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};
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}
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macro_rules! fallback_surface_impl {
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($func_name:ident, $self:ty, $return:ty, $($arg_name:ident : $arg_ty:ty),*) => {
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fn $func_name(self: $self, $($arg_name : $arg_ty),*) -> $return {
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match self {
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FallbackSurface::Preference(dev) => dev.$func_name($($arg_name),*),
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FallbackSurface::Fallback(dev) => dev.$func_name($($arg_name),*),
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}
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}
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};
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($func_name:ident, $self:ty, $return:ty) => {
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fallback_surface_impl!($func_name, $self, $return,);
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};
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($func_name:ident, $self:ty) => {
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fallback_surface_impl!($func_name, $self, ());
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};
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}
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impl<D1: Device, D2: Device> AsRawFd for FallbackDevice<D1, D2> {
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fallback_device_impl!(as_raw_fd, &Self, RawFd);
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}
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impl<D1: Device + BasicDevice, D2: Device + BasicDevice> BasicDevice for FallbackDevice<D1, D2> {}
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impl<D1: Device + ControlDevice, D2: Device + ControlDevice> ControlDevice for FallbackDevice<D1, D2> {}
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impl<E, C, S1, S2, D1, D2> Device for FallbackDevice<D1, D2>
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where
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// Connectors and Error need to match for both Surfaces
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E: std::error::Error + Send + 'static,
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C: IntoIterator<Item = connector::Handle> + 'static,
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S1: Surface<Error = E, Connectors = C> + 'static,
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S2: Surface<Error = E, Connectors = C> + 'static,
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D1: Device<Surface = S1> + 'static,
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D2: Device<Surface = S2> + 'static,
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{
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type Surface = FallbackSurface<S1, S2>;
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fallback_device_impl!(device_id, &Self, dev_t);
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fn set_handler(&mut self, handler: impl DeviceHandler<Device = Self> + 'static) {
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match self {
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FallbackDevice::Preference(dev) => dev.set_handler(FallbackDeviceHandlerD1(Box::new(handler))),
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FallbackDevice::Fallback(dev) => dev.set_handler(FallbackDeviceHandlerD2(Box::new(handler))),
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}
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}
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fallback_device_impl!(clear_handler, &mut Self);
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fn create_surface(&mut self, crtc: crtc::Handle) -> Result<Self::Surface, E> {
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match self {
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FallbackDevice::Preference(dev) => Ok(FallbackSurface::Preference(dev.create_surface(crtc)?)),
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FallbackDevice::Fallback(dev) => Ok(FallbackSurface::Fallback(dev.create_surface(crtc)?)),
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}
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}
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fallback_device_impl!(process_events, &mut Self);
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fallback_device_impl!(resource_handles, &Self, Result<ResourceHandles, E>);
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fallback_device_impl!(get_connector_info, &Self, Result<connector::Info, DrmError>, conn: connector::Handle);
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fallback_device_impl!(get_crtc_info, &Self, Result<crtc::Info, DrmError>, crtc: crtc::Handle);
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fallback_device_impl!(get_encoder_info, &Self, Result<encoder::Info, DrmError>, enc: encoder::Handle);
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fallback_device_impl!(get_framebuffer_info, &Self, Result<framebuffer::Info, DrmError>, fb: framebuffer::Handle);
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fallback_device_impl!(get_plane_info, &Self, Result<plane::Info, DrmError>, plane : plane::Handle);
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}
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// Impl RawDevice where underlying types implement RawDevice
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impl<E, C, S1, S2, D1, D2> RawDevice for FallbackDevice<D1, D2>
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where
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// Connectors and Error need to match for both Surfaces
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E: std::error::Error + Send + 'static,
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C: IntoIterator<Item = connector::Handle> + 'static,
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S1: RawSurface + Surface<Error = E, Connectors = C> + 'static,
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S2: RawSurface + Surface<Error = E, Connectors = C> + 'static,
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D1: RawDevice<Surface = S1> + 'static,
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D2: RawDevice<Surface = S2> + 'static,
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{
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type Surface = FallbackSurface<S1, S2>;
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}
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#[cfg(feature = "use_system_lib")]
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impl<D1: Device + EGLGraphicsBackend + 'static, D2: Device + EGLGraphicsBackend + 'static> EGLGraphicsBackend
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for FallbackDevice<D1, D2>
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{
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fallback_device_impl!(bind_wl_display, &Self, Result<EGLBufferReader, EGLError>, display : &Display);
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}
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impl<E, C, S1, S2> Surface for FallbackSurface<S1, S2>
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where
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// Connectors and Error need to match for both Surfaces
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E: std::error::Error + Send + 'static,
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C: IntoIterator<Item = connector::Handle> + 'static,
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S1: Surface<Error = E, Connectors = C> + 'static,
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S2: Surface<Error = E, Connectors = C> + 'static,
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{
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type Error = E;
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type Connectors = C;
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fallback_surface_impl!(crtc, &Self, crtc::Handle);
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fallback_surface_impl!(current_connectors, &Self, C);
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fallback_surface_impl!(pending_connectors, &Self, C);
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fallback_surface_impl!(add_connector, &Self, Result<(), E>, conn: connector::Handle);
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fallback_surface_impl!(remove_connector, &Self, Result<(), E>, conn: connector::Handle);
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fallback_surface_impl!(set_connectors, &Self, Result<(), E>, conns: &[connector::Handle]);
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fallback_surface_impl!(current_mode, &Self, Option<Mode>);
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fallback_surface_impl!(pending_mode, &Self, Option<Mode>);
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fallback_surface_impl!(use_mode, &Self, Result<(), E>, mode: Option<Mode>);
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}
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impl<E, C, S1, S2> RawSurface for FallbackSurface<S1, S2>
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where
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E: std::error::Error + Send + 'static,
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C: IntoIterator<Item = connector::Handle> + 'static,
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S1: RawSurface + Surface<Error = E, Connectors = C> + 'static,
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S2: RawSurface + Surface<Error = E, Connectors = C> + 'static,
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{
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fallback_surface_impl!(commit_pending, &Self, bool);
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fallback_surface_impl!(commit, &Self, Result<(), E>, fb: framebuffer::Handle);
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fn page_flip(&self, framebuffer: framebuffer::Handle) -> Result<(), SwapBuffersError> {
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match self {
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FallbackSurface::Preference(dev) => RawSurface::page_flip(dev, framebuffer),
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FallbackSurface::Fallback(dev) => RawSurface::page_flip(dev, framebuffer),
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}
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}
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}
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impl<S1: Surface + AsRawFd, S2: Surface + AsRawFd> AsRawFd for FallbackSurface<S1, S2> {
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fallback_surface_impl!(as_raw_fd, &Self, RawFd);
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}
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impl<S1: Surface + BasicDevice, S2: Surface + BasicDevice> BasicDevice for FallbackSurface<S1, S2> {}
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impl<S1: Surface + ControlDevice, S2: Surface + ControlDevice> ControlDevice for FallbackSurface<S1, S2> {}
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impl<E1, E2, C, CF, S1, S2> CursorBackend for FallbackSurface<S1, S2>
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where
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E1: std::error::Error + Send + 'static,
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E2: 'static,
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CF: ?Sized,
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C: IntoIterator<Item = connector::Handle> + 'static,
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S1: Surface<Error = E1, Connectors = C> + CursorBackend<CursorFormat = CF, Error = E2> + 'static,
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S2: Surface<Error = E1, Connectors = C> + CursorBackend<CursorFormat = CF, Error = E2> + 'static,
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{
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type CursorFormat = CF;
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type Error = E2;
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fallback_surface_impl!(set_cursor_position, &Self, Result<(), E2>, x: u32, y: u32);
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fallback_surface_impl!(set_cursor_representation, &Self, Result<(), E2>, buffer: &Self::CursorFormat, hotspot: (u32, u32));
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}
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#[cfg(feature = "renderer_gl")]
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impl<E, C, S1, S2> GLGraphicsBackend for FallbackSurface<S1, S2>
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where
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E: std::error::Error + Send + 'static,
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C: IntoIterator<Item = connector::Handle> + 'static,
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S1: Surface<Error = E, Connectors = C> + GLGraphicsBackend + 'static,
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S2: Surface<Error = E, Connectors = C> + GLGraphicsBackend + 'static,
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{
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fallback_surface_impl!(swap_buffers, &Self, Result<(), SwapBuffersError>);
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fallback_surface_impl!(get_proc_address, &Self, *const c_void, symbol: &str);
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fallback_surface_impl!(get_framebuffer_dimensions, &Self, (u32, u32));
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fallback_surface_impl!(is_current, &Self, bool);
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unsafe fn make_current(&self) -> Result<(), SwapBuffersError> {
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match self {
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FallbackSurface::Preference(dev) => dev.make_current(),
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FallbackSurface::Fallback(dev) => dev.make_current(),
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}
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}
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fallback_surface_impl!(get_pixel_format, &Self, PixelFormat);
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}
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@ -7,6 +7,8 @@ use drm::control::{connector, crtc, Mode, RawResourceHandle};
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use std::path::PathBuf;
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pub mod fallback;
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/// Errors thrown by the [`LegacyDrmDevice`](::backend::drm::legacy::LegacyDrmDevice),
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/// [`AtomicDrmDevice`](::backend::drm::atomic::AtomicDrmDevice)
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/// and their surfaces: [`LegacyDrmSurface`](::backend::drm::legacy::LegacyDrmSurface)
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