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gbm: fix EGLSurface recreation

This commit is contained in:
Victor Brekenfeld 2018-11-22 22:26:32 +01:00
parent d6e7fb591e
commit 5741ccdd46
6 changed files with 111 additions and 101 deletions
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27
src/backend/drm/gbm/egl.rs
View File

@ -87,19 +87,20 @@ unsafe impl<D: RawDevice + 'static> NativeSurface for GbmSurface<D> {
self.0.surface.borrow().as_raw() as *const _
}
fn swap_buffers<F>(&self, flip: F) -> ::std::result::Result<(), SwapBuffersError>
where
F: FnOnce() -> ::std::result::Result<(), SwapBuffersError>,
{
if self.0.crtc.commit_pending() || {
let fb = self.0.front_buffer.take();
let res = fb.is_none();
self.0.front_buffer.set(fb);
res
} {
self.recreate(flip).map_err(|_| SwapBuffersError::ContextLost)
} else {
self.page_flip(flip)
fn needs_recreation(&self) -> bool {
self.0.crtc.commit_pending()
}
fn recreate(&self) -> bool {
if let Err(err) = GbmSurface::recreate(self) {
error!(self.0.logger, "Failure recreating internal resources: {:?}", err);
false
} else {
true
}
}
fn swap_buffers(&self) -> ::std::result::Result<(), SwapBuffersError> {
self.page_flip()
}
}

1
src/backend/drm/gbm/mod.rs
View File

@ -161,6 +161,7 @@ impl<D: RawDevice + ControlDevice + 'static> Device for GbmDevice<D> {
current_frame_buffer: Cell::new(None),
front_buffer: Cell::new(None),
next_buffer: Cell::new(None),
recreated: Cell::new(true),
logger: self.logger.new(o!("crtc" => format!("{:?}", crtc))),
});
self.backends.borrow_mut().insert(crtc, Rc::downgrade(&backend));

10
src/backend/drm/gbm/session.rs
View File

@ -45,11 +45,11 @@ impl<S: SessionObserver + 'static, D: RawDevice + ControlDevice + AsSessionObser
for (crtc, backend) in backends.borrow().iter() {
if let Some(backend) = backend.upgrade() {
// restart rendering loop, if it was previously running
if let Some(Err(err)) = backend.current_frame_buffer.get().map(|fb|
backend
.crtc
.page_flip(fb.handle())
) {
if let Some(Err(err)) = backend
.current_frame_buffer
.get()
.map(|fb| backend.crtc.page_flip(fb.handle()))
{
warn!(self.logger, "Failed to restart rendering loop. Error: {}", err);
}
// reset cursor

74
src/backend/drm/gbm/surface.rs
View File

@ -22,6 +22,7 @@ pub(super) struct GbmSurfaceInternal<D: RawDevice + 'static> {
pub(super) current_frame_buffer: Cell<Option<framebuffer::Info>>,
pub(super) front_buffer: Cell<Option<SurfaceBufferHandle<framebuffer::Info>>>,
pub(super) next_buffer: Cell<Option<SurfaceBufferHandle<framebuffer::Info>>>,
pub(super) recreated: Cell<bool>,
pub(super) logger: ::slog::Logger,
}
@ -29,17 +30,12 @@ impl<D: RawDevice + 'static> GbmSurfaceInternal<D> {
pub(super) fn unlock_buffer(&self) {
// after the page swap is finished we need to release the rendered buffer.
// this is called from the PageFlipHandler
if let Some(next_buffer) = self.next_buffer.replace(None) {
trace!(self.logger, "Releasing old front buffer");
self.front_buffer.set(Some(next_buffer));
self.front_buffer.set(self.next_buffer.replace(None));
// drop and release the old buffer
}
}
pub fn page_flip<F>(&self, flip: F) -> ::std::result::Result<(), SwapBuffersError>
where
F: FnOnce() -> ::std::result::Result<(), SwapBuffersError>,
{
pub fn page_flip(&self) -> ::std::result::Result<(), SwapBuffersError> {
let res = {
let nb = self.next_buffer.take();
let res = nb.is_some();
@ -52,9 +48,6 @@ impl<D: RawDevice + 'static> GbmSurfaceInternal<D> {
return Err(SwapBuffersError::AlreadySwapped);
}
// flip normally
flip()?;
// supporting only one buffer would cause a lot of inconvinience and
// would most likely result in a lot of flickering.
// neither weston, wlc or wlroots bother with that as well.
@ -81,17 +74,21 @@ impl<D: RawDevice + 'static> GbmSurfaceInternal<D> {
self.next_buffer.set(Some(next_bo));
trace!(self.logger, "Queueing Page flip");
if self.recreated.get() {
self.crtc
.commit(fb.handle())
.map_err(|_| SwapBuffersError::ContextLost)?;
self.recreated.set(false);
} else {
self.crtc.page_flip(fb.handle())?;
}
self.current_frame_buffer.set(Some(fb));
Ok(())
}
pub fn recreate<F>(&self, flip: F) -> Result<()>
where
F: FnOnce() -> ::std::result::Result<(), SwapBuffersError>,
{
pub fn recreate(&self) -> Result<()> {
let (w, h) = self.pending_mode().size();
// Recreate the surface and the related resources to match the new
@ -107,10 +104,8 @@ impl<D: RawDevice + 'static> GbmSurfaceInternal<D> {
BufferObjectFlags::SCANOUT | BufferObjectFlags::RENDERING,
).chain_err(|| ErrorKind::SurfaceCreationFailed)?;
// Clean up next_buffer
{
if let Some(mut old_bo) = self.next_buffer.take() {
if let Ok(Some(fb)) = old_bo.take_userdata() {
// Clean up buffers
if let Some(Ok(Some(fb))) = self.next_buffer.take().map(|mut bo| bo.take_userdata()) {
if let Err(err) = framebuffer::destroy(&self.crtc, fb.handle()) {
warn!(
self.logger,
@ -118,33 +113,8 @@ impl<D: RawDevice + 'static> GbmSurfaceInternal<D> {
);
}
}
}
}
flip()?;
// Cleanup front_buffer and init the first screen on the new front_buffer
// (must be done before calling page_flip for the first time)
let old_front_bo = self.front_buffer.replace({
let mut front_bo = surface
.lock_front_buffer()
.chain_err(|| ErrorKind::FrontBufferLockFailed)?;
debug!(self.logger, "FrontBuffer color format: {:?}", front_bo.format());
// we also need a new framebuffer for the front buffer
let fb = framebuffer::create(&self.crtc, &*front_bo)
.chain_err(|| ErrorKind::UnderlyingBackendError)?;
self.crtc
.commit(fb.handle())
.chain_err(|| ErrorKind::UnderlyingBackendError)?;
self.current_frame_buffer.set(Some(fb));
front_bo.set_userdata(fb).unwrap();
Some(front_bo)
});
if let Some(Ok(Some(fb))) = old_front_bo.map(|mut bo| bo.take_userdata()) {
if let Some(Ok(Some(fb))) = self.front_buffer.take().map(|mut bo| bo.take_userdata()) {
if let Err(err) = framebuffer::destroy(&self.crtc, fb.handle()) {
warn!(
self.logger,
@ -156,6 +126,8 @@ impl<D: RawDevice + 'static> GbmSurfaceInternal<D> {
// Drop the old surface after cleanup
*self.surface.borrow_mut() = surface;
self.recreated.set(true);
Ok(())
}
}
@ -308,18 +280,12 @@ impl<D: RawDevice + 'static> Drop for GbmSurfaceInternal<D> {
pub struct GbmSurface<D: RawDevice + 'static>(pub(super) Rc<GbmSurfaceInternal<D>>);
impl<D: RawDevice + 'static> GbmSurface<D> {
pub fn page_flip<F>(&self, flip: F) -> ::std::result::Result<(), SwapBuffersError>
where
F: FnOnce() -> ::std::result::Result<(), SwapBuffersError>,
{
self.0.page_flip(flip)
pub fn page_flip(&self) -> ::std::result::Result<(), SwapBuffersError> {
self.0.page_flip()
}
pub fn recreate<F>(&self, flip: F) -> Result<()>
where
F: FnOnce() -> ::std::result::Result<(), SwapBuffersError>,
{
self.0.recreate(flip)
pub fn recreate(&self) -> Result<()> {
self.0.recreate()
}
}

29
src/backend/egl/native.rs
View File

@ -167,14 +167,31 @@ unsafe impl NativeDisplay<Wayland> for WinitWindow {
pub unsafe trait NativeSurface {
/// Return a raw pointer egl will accept for surface creation.
fn ptr(&self) -> ffi::NativeWindowType;
/// Will be called to check if any internal resources will need
/// to be recreated. Old resources must be used until `recreate`
/// was called.
///
/// Only needs to be recreated, if this shall sometimes return true.
/// The default implementation always returns false.
fn needs_recreation(&self) -> bool {
false
}
/// Instructs the surface to recreate internal resources
///
/// Must only be implemented if `needs_recreation` can return `true`.
/// Returns true on success.
/// If this call was successful `ptr()` *should* return something different.
fn recreate(&self) -> bool {
true
}
/// Adds additional semantics when calling EGLSurface::swap_buffers
///
/// Only implement if required by the backend, flip must be called during this call.
fn swap_buffers<F>(&self, flip: F) -> ::std::result::Result<(), SwapBuffersError>
where
F: FnOnce() -> ::std::result::Result<(), SwapBuffersError>,
{
flip()
/// Only implement if required by the backend.
fn swap_buffers(&self) -> ::std::result::Result<(), SwapBuffersError> {
Ok(())
}
}

57
src/backend/egl/surface.rs
View File

@ -2,7 +2,9 @@
use super::{error::*, ffi, native, EGLContext};
use backend::graphics::SwapBuffersError;
use nix::libc::c_int;
use std::{
cell::Cell,
ops::{Deref, DerefMut},
rc::{Rc, Weak},
};
@ -12,7 +14,9 @@ pub struct EGLSurface<N: native::NativeSurface> {
context: Weak<ffi::egl::types::EGLContext>,
display: Weak<ffi::egl::types::EGLDisplay>,
native: N,
surface: ffi::egl::types::EGLSurface,
surface: Cell<ffi::egl::types::EGLSurface>,
config_id: ffi::egl::types::EGLConfig,
surface_attributes: Vec<c_int>,
}
impl<N: native::NativeSurface> Deref for EGLSurface<N> {
@ -50,29 +54,50 @@ impl<N: native::NativeSurface> EGLSurface<N> {
context: Rc::downgrade(&context.context),
display: Rc::downgrade(&context.display),
native,
surface,
surface: Cell::new(surface),
config_id: context.config_id,
surface_attributes: context.surface_attributes.clone(),
})
}
/// Swaps buffers at the end of a frame.
pub fn swap_buffers(&self) -> ::std::result::Result<(), SwapBuffersError> {
self.native.swap_buffers(|| {
let surface = self.surface.get();
if !surface.is_null() {
if let Some(display) = self.display.upgrade() {
let ret = unsafe { ffi::egl::SwapBuffers((*display) as *const _, self.surface as *const _) };
let ret = unsafe { ffi::egl::SwapBuffers((*display) as *const _, surface as *const _) };
if ret == 0 {
match unsafe { ffi::egl::GetError() } as u32 {
ffi::egl::CONTEXT_LOST => Err(SwapBuffersError::ContextLost),
err => Err(SwapBuffersError::Unknown(err)),
ffi::egl::CONTEXT_LOST => return Err(SwapBuffersError::ContextLost),
err => return Err(SwapBuffersError::Unknown(err)),
};
} else {
return Ok(());
}
} else {
return Err(SwapBuffersError::ContextLost);
}
self.native.swap_buffers()?;
};
if self.native.needs_recreation() || surface.is_null() {
if let Some(display) = self.display.upgrade() {
self.native.recreate();
self.surface.set(unsafe {
ffi::egl::CreateWindowSurface(
*display,
self.config_id,
self.native.ptr(),
self.surface_attributes.as_ptr(),
)
});
}
}
Ok(())
}
} else {
Err(SwapBuffersError::ContextLost)
}
})
}
/// Makes the OpenGL context the current context in the current thread.
///
@ -84,8 +109,8 @@ impl<N: native::NativeSurface> EGLSurface<N> {
if let (Some(display), Some(context)) = (self.display.upgrade(), self.context.upgrade()) {
let ret = ffi::egl::MakeCurrent(
(*display) as *const _,
self.surface as *const _,
self.surface as *const _,
self.surface.get() as *const _,
self.surface.get() as *const _,
(*context) as *const _,
);
@ -106,8 +131,8 @@ impl<N: native::NativeSurface> EGLSurface<N> {
pub fn is_current(&self) -> bool {
if self.context.upgrade().is_some() {
unsafe {
ffi::egl::GetCurrentSurface(ffi::egl::DRAW as _) == self.surface as *const _
&& ffi::egl::GetCurrentSurface(ffi::egl::READ as _) == self.surface as *const _
ffi::egl::GetCurrentSurface(ffi::egl::DRAW as _) == self.surface.get() as *const _
&& ffi::egl::GetCurrentSurface(ffi::egl::READ as _) == self.surface.get() as *const _
}
} else {
false
@ -119,7 +144,7 @@ impl<N: native::NativeSurface> Drop for EGLSurface<N> {
fn drop(&mut self) {
if let Some(display) = self.display.upgrade() {
unsafe {
ffi::egl::DestroySurface((*display) as *const _, self.surface as *const _);
ffi::egl::DestroySurface((*display) as *const _, self.surface.get() as *const _);
}
}
}