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Refactor drm backend 

- Split `DrmDevice` into `LegacyDrmDevice`, `GbmDevice` and `EglDevice`
- Provide common `Device` and `RawDevice` traits

- Change `DrmBackend` into `Surface` (and `RawSurface`) implementations of each `Device` (or `RawDevice`)
This commit is contained in:
Victor Brekenfeld 2018-11-21 09:44:48 +01:00
parent b537237a74
commit bd5690bd77
16 changed files with 1811 additions and 1229 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
Cargo.toml
View File

@ -21,7 +21,7 @@ slog-stdlog = "3.0.2"
libloading = "0.4.0" libloading = "0.4.0"
wayland-client = { version = "0.21.1", features = ["egl"], optional = true } wayland-client = { version = "0.21.1", features = ["egl"], optional = true }
winit = { version = "0.18.0", optional = true } winit = { version = "0.18.0", optional = true }
drm = { version = "^0.3.1", optional = true } drm = { version = "^0.3.4", optional = true }
gbm = { version = "^0.4.0", optional = true, default-features = false, features = ["drm-support"] } gbm = { version = "^0.4.0", optional = true, default-features = false, features = ["drm-support"] }
glium = { version = "0.19.0", optional = true, default-features = false } glium = { version = "0.19.0", optional = true, default-features = false }
input = { version = "0.4.0", optional = true } input = { version = "0.4.0", optional = true }
@ -37,9 +37,12 @@ lazy_static = "1.0.0"
gl_generator = { version = "0.9", optional = true } gl_generator = { version = "0.9", optional = true }
[features] [features]
default = ["backend_winit", "backend_drm", "backend_libinput", "backend_udev", "renderer_glium", "xwayland"] default = ["backend_winit", "backend_drm_legacy", "backend_drm_gbm", "backend_drm_egl", "backend_libinput", "backend_udev", "renderer_glium", "xwayland"]
backend_winit = ["winit", "wayland-server/dlopen", "wayland-client/dlopen", "backend_egl"] backend_winit = ["winit", "wayland-server/dlopen", "wayland-client/dlopen", "backend_egl"]
backend_drm = ["drm", "backend_egl"] backend_drm = ["drm"]
backend_drm_legacy = ["backend_drm"]
backend_drm_gbm = ["backend_drm", "gbm"]
backend_drm_egl = ["backend_drm", "backend_egl"]
backend_egl = ["gl_generator"] backend_egl = ["gl_generator"]
backend_libinput = ["input"] backend_libinput = ["input"]
backend_session = [] backend_session = []

537
src/backend/drm/backend.rs
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@ -1,537 +0,0 @@
use super::{error::*, DevPath};
use backend::graphics::{
egl::{
error::Result as EGLResult,
native::{Gbm, GbmSurfaceArguments},
wayland::{EGLDisplay, EGLWaylandExtensions},
EGLContext, EGLGraphicsBackend, EGLSurface, PixelFormat, SwapBuffersError,
},
GraphicsBackend,
};
use drm::{
control::{connector, crtc, encoder, framebuffer, Device, Mode, ResourceInfo},
Device as BasicDevice,
};
use gbm::{
BufferObject, BufferObjectFlags, Device as GbmDevice, Format as GbmFormat, Surface as GbmSurface,
SurfaceBufferHandle,
};
use image::{ImageBuffer, Rgba};
use nix::libc::c_void;
use std::{
cell::Cell,
os::unix::io::{AsRawFd, RawFd},
rc::{Rc, Weak},
};
use wayland_server::Display;
/// Backend based on a `DrmDevice` and a given crtc
pub struct DrmBackend<A: Device + 'static> {
backend: Rc<DrmBackendInternal<A>>,
surface: EGLSurface<GbmSurface<framebuffer::Info>>,
mode: Mode,
connectors: Vec<connector::Handle>,
}
pub(crate) struct DrmBackendInternal<A: Device + 'static> {
pub(crate) context: Rc<EGLContext<Gbm<framebuffer::Info>, GbmDevice<A>>>,
pub(crate) cursor: Cell<(BufferObject<()>, (u32, u32))>,
current_frame_buffer: Cell<framebuffer::Info>,
front_buffer: Cell<SurfaceBufferHandle<framebuffer::Info>>,
next_buffer: Cell<Option<SurfaceBufferHandle<framebuffer::Info>>>,
crtc: crtc::Handle,
logger: ::slog::Logger,
}
impl<A: Device + 'static> DrmBackend<A> {
pub(crate) fn new(
context: Rc<EGLContext<Gbm<framebuffer::Info>, GbmDevice<A>>>,
crtc: crtc::Handle,
mode: Mode,
connectors: Vec<connector::Handle>,
log: ::slog::Logger,
) -> Result<Self> {
// logger already initialized by the DrmDevice
info!(log, "Initializing DrmBackend");
let (w, h) = mode.size();
debug!(log, "Creating Surface");
let surface = context
.create_surface(GbmSurfaceArguments {
size: (w as u32, h as u32),
format: GbmFormat::XRGB8888,
flags: BufferObjectFlags::SCANOUT | BufferObjectFlags::RENDERING,
}).chain_err(|| ErrorKind::GbmInitFailed)?;
// make it active for the first `crtc::set`
// (which is needed before the first page_flip)
unsafe { surface.make_current().chain_err(|| ErrorKind::FailedToSwap)? };
surface.swap_buffers().chain_err(|| ErrorKind::FailedToSwap)?;
// init the first screen
// (must be done before calling page_flip for the first time)
let mut front_bo = surface
.lock_front_buffer()
.chain_err(|| ErrorKind::FailedToSwap)?;
debug!(log, "FrontBuffer color format: {:?}", front_bo.format());
// we need a framebuffer for the front buffer
let fb = framebuffer::create(&*context, &*front_bo).chain_err(|| {
ErrorKind::DrmDev(format!("Error creating framebuffer on {:?}", context.dev_path()))
})?;
debug!(log, "Initialize screen");
crtc::set(&*context, crtc, fb.handle(), &connectors, (0, 0), Some(mode)).chain_err(|| {
ErrorKind::DrmDev(format!(
"Error setting crtc {:?} on {:?}",
crtc,
context.dev_path()
))
})?;
front_bo.set_userdata(fb).unwrap();
let cursor = Cell::new((
context
.create_buffer_object(
1,
1,
GbmFormat::ARGB8888,
BufferObjectFlags::CURSOR | BufferObjectFlags::WRITE,
).chain_err(|| ErrorKind::GbmInitFailed)?,
(0, 0),
));
Ok(DrmBackend {
backend: Rc::new(DrmBackendInternal {
context,
cursor,
current_frame_buffer: Cell::new(fb),
front_buffer: Cell::new(front_bo),
next_buffer: Cell::new(None),
crtc,
logger: log,
}),
surface,
mode,
connectors,
})
}
pub(crate) fn weak(&self) -> Weak<DrmBackendInternal<A>> {
Rc::downgrade(&self.backend)
}
/// Add a connector to backend
///
/// # Errors
///
/// Errors if the new connector does not support the currently set `Mode`
pub fn add_connector(&mut self, connector: connector::Handle) -> Result<()> {
let info = connector::Info::load_from_device(&*self.backend.context, connector).chain_err(|| {
ErrorKind::DrmDev(format!(
"Error loading connector info on {:?}",
self.backend.context.dev_path()
))
})?;
// check if the connector can handle the current mode
if info.modes().contains(&self.mode) {
// check if there is a valid encoder
let encoders = info
.encoders()
.iter()
.map(|encoder| {
encoder::Info::load_from_device(&*self.backend.context, *encoder).chain_err(|| {
ErrorKind::DrmDev(format!(
"Error loading encoder info on {:?}",
self.backend.context.dev_path()
))
})
}).collect::<Result<Vec<encoder::Info>>>()?;
// and if any encoder supports the selected crtc
let resource_handles = self.backend.context.resource_handles().chain_err(|| {
ErrorKind::DrmDev(format!(
"Error loading resources on {:?}",
self.backend.context.dev_path()
))
})?;
if !encoders
.iter()
.map(|encoder| encoder.possible_crtcs())
.all(|crtc_list| {
resource_handles
.filter_crtcs(crtc_list)
.contains(&self.backend.crtc)
}) {
bail!(ErrorKind::NoSuitableEncoder(info, self.backend.crtc));
}
info!(
self.backend.logger,
"Adding new connector: {:?}",
info.connector_type()
);
self.connectors.push(connector);
Ok(())
} else {
bail!(ErrorKind::ModeNotSuitable(self.mode))
}
}
/// Returns the currently set connectors
pub fn used_connectors(&self) -> &[connector::Handle] {
&*self.connectors
}
/// Removes a currently set connector
pub fn remove_connector(&mut self, connector: connector::Handle) {
if let Ok(info) = connector::Info::load_from_device(&*self.backend.context, connector) {
info!(
self.backend.logger,
"Removing connector: {:?}",
info.connector_type()
);
} else {
info!(self.backend.logger, "Removing unknown connector");
}
self.connectors.retain(|x| *x != connector);
}
/// Gets the currently used mode
pub fn current_mode(&self) -> Mode {
self.mode
}
/// Changes the currently set mode
///
/// # Errors
///
/// This will fail if not all set connectors support the new `Mode`.
/// Several internal resources will need to be recreated to fit the new `Mode`.
/// Other errors might occur.
pub fn use_mode(&mut self, mode: Mode) -> Result<()> {
// check the connectors
for connector in &self.connectors {
if !connector::Info::load_from_device(&*self.backend.context, *connector)
.chain_err(|| {
ErrorKind::DrmDev(format!(
"Error loading connector info on {:?}",
self.backend.context.dev_path()
))
})?.modes()
.contains(&mode)
{
bail!(ErrorKind::ModeNotSuitable(mode));
}
}
info!(self.backend.logger, "Setting new mode: {:?}", mode.name());
let (w, h) = mode.size();
// Recreate the surface and the related resources to match the new
// resolution.
debug!(
self.backend.logger,
"Reinitializing surface for new mode: {}:{}", w, h
);
let surface = self
.backend
.context
.create_surface(GbmSurfaceArguments {
size: (w as u32, h as u32),
format: GbmFormat::XRGB8888,
flags: BufferObjectFlags::SCANOUT | BufferObjectFlags::RENDERING,
}).chain_err(|| ErrorKind::GbmInitFailed)?;
// make it active for the first `crtc::set`
// (which is needed before the first page_flip)
unsafe { surface.make_current().chain_err(|| ErrorKind::FailedToSwap)? };
surface.swap_buffers().chain_err(|| ErrorKind::FailedToSwap)?;
// Clean up next_buffer
{
if let Some(mut old_bo) = self.backend.next_buffer.take() {
if let Ok(Some(fb)) = old_bo.take_userdata() {
if let Err(err) = framebuffer::destroy(&*self.backend.context, fb.handle()) {
warn!(
self.backend.logger,
"Error releasing old back_buffer framebuffer: {:?}", err
);
}
}
}
}
// 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 mut old_front_bo = self.backend.front_buffer.replace({
let mut front_bo = surface
.lock_front_buffer()
.chain_err(|| ErrorKind::FailedToSwap)?;
debug!(
self.backend.logger,
"FrontBuffer color format: {:?}",
front_bo.format()
);
// we also need a new framebuffer for the front buffer
let dev_path = self.backend.context.dev_path();
let fb = framebuffer::create(&*self.backend.context, &*front_bo)
.chain_err(|| ErrorKind::DrmDev(format!("Error creating framebuffer on {:?}", dev_path)))?;
front_bo.set_userdata(fb).unwrap();
debug!(self.backend.logger, "Setting screen");
crtc::set(
&*self.backend.context,
self.backend.crtc,
fb.handle(),
&self.connectors,
(0, 0),
Some(mode),
).chain_err(|| {
ErrorKind::DrmDev(format!(
"Error setting crtc {:?} on {:?}",
self.backend.crtc,
self.backend.context.dev_path()
))
})?;
front_bo
});
if let Ok(Some(fb)) = old_front_bo.take_userdata() {
if let Err(err) = framebuffer::destroy(&*self.backend.context, fb.handle()) {
warn!(
self.backend.logger,
"Error releasing old front_buffer framebuffer: {:?}", err
);
}
}
// Drop the old surface after cleanup
self.surface = surface;
self.mode = mode;
Ok(())
}
/// Returns the crtc id used by this backend
pub fn crtc(&self) -> crtc::Handle {
self.backend.crtc
}
}
impl<A: Device + 'static> DrmBackendInternal<A> {
pub(crate) 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(next_buffer);
// drop and release the old buffer
}
}
pub(crate) fn page_flip(
&self,
fb: Option<&framebuffer::Info>,
) -> ::std::result::Result<(), SwapBuffersError> {
trace!(self.logger, "Queueing Page flip");
let fb = *fb.unwrap_or(&self.current_frame_buffer.get());
// and flip
crtc::page_flip(
&*self.context,
self.crtc,
fb.handle(),
&[crtc::PageFlipFlags::PageFlipEvent],
).map_err(|_| SwapBuffersError::ContextLost)?;
self.current_frame_buffer.set(fb);
Ok(())
}
}
impl<A: Device + 'static> Drop for DrmBackend<A> {
fn drop(&mut self) {
// Drop framebuffers attached to the userdata of the gbm surface buffers.
// (They don't implement drop, as they need the device)
if let Ok(Some(fb)) = {
if let Some(mut next) = self.backend.next_buffer.take() {
next.take_userdata()
} else if let Ok(mut next) = self.surface.lock_front_buffer() {
next.take_userdata()
} else {
Ok(None)
}
} {
// ignore failure at this point
let _ = framebuffer::destroy(&*self.backend.context, fb.handle());
}
}
}
impl<A: Device + 'static> Drop for DrmBackendInternal<A> {
fn drop(&mut self) {
if let Ok(Some(fb)) = self.front_buffer.get_mut().take_userdata() {
// ignore failure at this point
let _ = framebuffer::destroy(&*self.context, fb.handle());
}
// ignore failure at this point
let _ = crtc::clear_cursor(&*self.context, self.crtc);
}
}
impl<A: Device + 'static> GraphicsBackend for DrmBackend<A> {
type CursorFormat = ImageBuffer<Rgba<u8>, Vec<u8>>;
type Error = Error;
fn set_cursor_position(&self, x: u32, y: u32) -> Result<()> {
trace!(self.backend.logger, "Move the cursor to {},{}", x, y);
crtc::move_cursor(&*self.backend.context, self.backend.crtc, (x as i32, y as i32)).chain_err(|| {
ErrorKind::DrmDev(format!(
"Error moving cursor on {:?}",
self.backend.context.dev_path()
))
})
}
fn set_cursor_representation(
&self,
buffer: &ImageBuffer<Rgba<u8>, Vec<u8>>,
hotspot: (u32, u32),
) -> Result<()> {
let (w, h) = buffer.dimensions();
debug!(self.backend.logger, "Importing cursor");
// import the cursor into a buffer we can render
let mut cursor = self
.backend
.context
.create_buffer_object(
w,
h,
GbmFormat::ARGB8888,
BufferObjectFlags::CURSOR | BufferObjectFlags::WRITE,
).chain_err(|| ErrorKind::GbmInitFailed)?;
cursor
.write(&**buffer)
.chain_err(|| ErrorKind::GbmInitFailed)?
.chain_err(|| ErrorKind::GbmInitFailed)?;
trace!(self.backend.logger, "Setting the new imported cursor");
// and set it
if crtc::set_cursor2(
&*self.backend.context,
self.backend.crtc,
&cursor,
(hotspot.0 as i32, hotspot.1 as i32),
).is_err()
{
crtc::set_cursor(&*self.backend.context, self.backend.crtc, &cursor).chain_err(|| {
ErrorKind::DrmDev(format!(
"Failed to set cursor on {:?}",
self.backend.context.dev_path()
))
})?;
}
// and store it
self.backend.cursor.set((cursor, hotspot));
Ok(())
}
}
impl<A: Device + 'static> EGLGraphicsBackend for DrmBackend<A> {
fn swap_buffers(&self) -> ::std::result::Result<(), SwapBuffersError> {
let res = {
let nb = self.backend.next_buffer.take();
let res = nb.is_some();
self.backend.next_buffer.set(nb);
res
};
if res {
// We cannot call lock_front_buffer anymore without releasing the previous buffer, which will happen when the page flip is done
warn!(
self.backend.logger,
"Tried to swap a DrmBackend with a queued flip"
);
return Err(SwapBuffersError::AlreadySwapped);
}
// flip normally
self.surface.swap_buffers()?;
// 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.
// so we just assume we got at least two buffers to do flipping.
let mut next_bo = self
.surface
.lock_front_buffer()
.expect("Surface only has one front buffer. Not supported by smithay");
// create a framebuffer if the front buffer does not have one already
// (they are reused by gbm)
let maybe_fb = next_bo
.userdata()
.map_err(|_| SwapBuffersError::ContextLost)?
.cloned();
let fb = if let Some(info) = maybe_fb {
info
} else {
let fb = framebuffer::create(&*self.backend.context, &*next_bo)
.map_err(|_| SwapBuffersError::ContextLost)?;
next_bo.set_userdata(fb).unwrap();
fb
};
self.backend.next_buffer.set(Some(next_bo));
self.backend.page_flip(Some(&fb))
}
unsafe fn get_proc_address(&self, symbol: &str) -> *const c_void {
self.backend.context.get_proc_address(symbol)
}
fn get_framebuffer_dimensions(&self) -> (u32, u32) {
let (w, h) = self.mode.size();
(w as u32, h as u32)
}
fn is_current(&self) -> bool {
self.backend.context.is_current() && self.surface.is_current()
}
unsafe fn make_current(&self) -> ::std::result::Result<(), SwapBuffersError> {
self.surface.make_current()
}
fn get_pixel_format(&self) -> PixelFormat {
self.backend.context.get_pixel_format()
}
}
// for users convenience
impl<A: Device + 'static> AsRawFd for DrmBackend<A> {
fn as_raw_fd(&self) -> RawFd {
self.backend.context.as_raw_fd()
}
}
impl<A: Device + 'static> BasicDevice for DrmBackend<A> {}
impl<A: Device + 'static> Device for DrmBackend<A> {}
impl<A: Device + 'static> EGLWaylandExtensions for DrmBackend<A> {
fn bind_wl_display(&self, display: &Display) -> EGLResult<EGLDisplay> {
self.backend.context.bind_wl_display(display)
}
}

19
src/backend/drm/egl/error.rs Normal file
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@ -0,0 +1,19 @@
//!
//! Errors thrown by the `DrmDevice` and `DrmBackend`
//!
use backend::egl::error as egl;
error_chain! {
errors {
#[doc = "Underlying backend failed"]
UnderlyingBackendError {
description("The underlying backend reported an error"),
display("The underlying backend reported an error"),
}
}
links {
EGL(egl::Error, egl::ErrorKind) #[doc = "EGL error"];
}
}

172
src/backend/drm/egl/mod.rs Normal file
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@ -0,0 +1,172 @@
use drm::control::{crtc, Mode};
use std::cell::RefCell;
use std::collections::HashMap;
use std::rc::{Rc, Weak};
use std::os::unix::io::{AsRawFd, RawFd};
use wayland_server::Display;
use backend::egl::{EGLContext, EGLGraphicsBackend, EGLDisplay};
use backend::egl::context::GlAttributes;
use backend::egl::native::{Backend, NativeDisplay, NativeSurface};
use backend::egl::error::Result as EGLResult;
use super::{Device, Surface, DeviceHandler};
pub mod error;
use self::error::*;
mod surface;
pub use self::surface::*;
#[cfg(feature = "backend_session")]
pub mod session;
/// Representation of an open gbm device to create rendering backends
pub struct EglDevice<B: Backend<Surface=<D as Device>::Surface> + 'static, D: Device + NativeDisplay<B> + 'static>
where <D as Device>::Surface: NativeSurface
{
dev: Rc<RefCell<EGLContext<B, D>>>,
backends: Rc<RefCell<HashMap<crtc::Handle, Weak<EglSurface<B, D>>>>>,
logger: ::slog::Logger,
}
impl<B: Backend<Surface=<D as Device>::Surface> + 'static, D: Device + NativeDisplay<B> + 'static> AsRawFd for EglDevice<B, D>
where <D as Device>::Surface: NativeSurface
{
fn as_raw_fd(&self) -> RawFd {
self.dev.borrow().as_raw_fd()
}
}
impl<B: Backend<Surface=<D as Device>::Surface> + 'static, D: Device + NativeDisplay<B> + 'static> EglDevice<B, D>
where <D as Device>::Surface: NativeSurface
{
/// Create a new `EglGbmDrmDevice` from an open drm node
///
/// Returns an error if the file is no valid drm node or context creation was not
/// successful.
pub fn new<L>(dev: D, logger: L) -> Result<Self>
where
L: Into<Option<::slog::Logger>>,
{
EglDevice::new_with_gl_attr(
dev,
GlAttributes {
version: None,
profile: None,
debug: cfg!(debug_assertions),
vsync: true,
},
logger,
)
}
/// Create a new `EglGbmDrmDevice` from an open `RawDevice` and given `GlAttributes`
///
/// Returns an error if the file is no valid drm node or context creation was not
/// successful.
pub fn new_with_gl_attr<L>(mut dev: D, attributes: GlAttributes, logger: L) -> Result<Self>
where
L: Into<Option<::slog::Logger>>,
{
let log = ::slog_or_stdlog(logger).new(o!("smithay_module" => "backend_egl"));
dev.clear_handler();
debug!(log, "Creating egl context from device");
Ok(EglDevice {
// Open the gbm device from the drm device and create a context based on that
dev: Rc::new(RefCell::new(EGLContext::new(
dev,
attributes,
Default::default(),
log.clone(),
).map_err(Error::from)?
)),
backends: Rc::new(RefCell::new(HashMap::new())),
logger: log,
})
}
}
struct InternalDeviceHandler<B: Backend<Surface=<D as Device>::Surface> + 'static, D: Device + NativeDisplay<B> + 'static>
where <D as Device>::Surface: NativeSurface
{
handler: Box<DeviceHandler<Device=EglDevice<B, D>> + 'static>,
backends: Weak<RefCell<HashMap<crtc::Handle, Weak<EglSurface<B, D>>>>>,
logger: ::slog::Logger,
}
impl<B: Backend<Surface=<D as Device>::Surface> + 'static, D: Device + NativeDisplay<B> + 'static> DeviceHandler for InternalDeviceHandler<B, D>
where
<D as NativeDisplay<B>>::Arguments: From<(crtc::Handle, Mode, <<D as Device>::Surface as Surface>::Connectors)>,
<D as Device>::Surface: NativeSurface,
{
type Device=D;
fn vblank(&mut self, surface: &<D as Device>::Surface) {
if let Some(backends) = self.backends.upgrade() {
if let Some(surface) = backends.borrow().get(&surface.crtc()) {
if let Some(surface) = surface.upgrade() {
self.handler.vblank(&*surface);
}
} else {
warn!(self.logger, "Surface ({:?}) not managed by egl, event not handled.", surface.crtc());
}
}
}
fn error(&mut self, error: <<D as Device>::Surface as Surface>::Error) {
self.handler.error(ResultExt::<()>::chain_err(Err(error), || ErrorKind::UnderlyingBackendError).unwrap_err())
}
}
impl<B: Backend<Surface=<D as Device>::Surface> + 'static, D: Device + NativeDisplay<B> + 'static> Device for EglDevice<B, D>
where
<D as NativeDisplay<B>>::Arguments: From<(crtc::Handle, Mode, <<D as Device>::Surface as Surface>::Connectors)>,
<D as Device>::Surface: NativeSurface,
{
type Surface = EglSurface<B, D>;
type Return = Rc<EglSurface<B, D>>;
fn set_handler(&mut self, handler: impl DeviceHandler<Device=Self> + 'static) {
self.dev.borrow_mut().set_handler(InternalDeviceHandler {
handler: Box::new(handler),
backends: Rc::downgrade(&self.backends),
logger: self.logger.clone(),
});
}
fn clear_handler(&mut self) {
self.dev.borrow_mut().clear_handler()
}
fn create_surface(
&mut self,
crtc: crtc::Handle,
mode: Mode,
connectors: impl Into<<<Self as Device>::Surface as Surface>::Connectors>,
) -> Result<Rc<EglSurface<B, D>>> {
info!(self.logger, "Initializing EglSurface");
let surface = self.dev.borrow_mut().create_surface((crtc, mode, connectors.into()).into())?;
let backend = Rc::new(EglSurface {
dev: self.dev.clone(),
surface,
});
self.backends.borrow_mut().insert(crtc, Rc::downgrade(&backend));
Ok(backend)
}
fn process_events(&mut self) {
self.dev.borrow_mut().process_events()
}
}
impl<B: Backend<Surface=<D as Device>::Surface> + 'static, D: Device + NativeDisplay<B> + 'static> EGLGraphicsBackend for EglDevice<B, D>
where <D as Device>::Surface: NativeSurface
{
fn bind_wl_display(&self, display: &Display) -> EGLResult<EGLDisplay> {
self.dev.borrow().bind_wl_display(display)
}
}

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use std::os::unix::io::RawFd;
use backend::egl::native::{Backend, NativeDisplay, NativeSurface};
use backend::session::{AsSessionObserver, SessionObserver};
use backend::drm::Device;
use super::{EglDevice};
/// `SessionObserver` linked to the `DrmDevice` it was created from.
pub struct EglDeviceObserver<S: SessionObserver + 'static> {
observer: S,
}
impl<
S: SessionObserver + 'static,
B: Backend<Surface=<D as Device>::Surface> + 'static,
D: Device + NativeDisplay<B> + AsSessionObserver<S> + 'static,
> AsSessionObserver<EglDeviceObserver<S>> for EglDevice<B, D>
where <D as Device>::Surface: NativeSurface
{
fn observer(&mut self) -> EglDeviceObserver<S> {
EglDeviceObserver {
observer: (**self.dev.borrow_mut()).observer(),
}
}
}
impl<S: SessionObserver + 'static> SessionObserver for EglDeviceObserver<S> {
fn pause(&mut self, devnum: Option<(u32, u32)>) {
self.observer.pause(devnum);
}
fn activate(&mut self, devnum: Option<(u32, u32, Option<RawFd>)>) {
self.observer.activate(devnum);
}
}

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use drm::control::{connector, crtc, Mode};
use nix::libc::c_void;
use std::cell::RefCell;
use std::rc::Rc;
use backend::drm::{Device, Surface};
use backend::egl::{EGLContext, EGLSurface};
use backend::egl::native::{Backend, NativeDisplay, NativeSurface};
use backend::graphics::{CursorBackend, SwapBuffersError};
use backend::graphics::gl::{GLGraphicsBackend, PixelFormat};
use super::error::*;
pub struct EglSurface<B: Backend<Surface=<D as Device>::Surface> + 'static, D: Device + NativeDisplay<B> + 'static>
where <D as Device>::Surface: NativeSurface
{
pub(in super) dev: Rc<RefCell<EGLContext<B, D>>>,
pub(in super) surface: EGLSurface<B::Surface>,
}
impl<B: Backend<Surface=<D as Device>::Surface> + 'static, D: Device + NativeDisplay<B> + 'static> Surface for EglSurface<B, D>
where <D as Device>::Surface: NativeSurface
{
type Error = Error;
type Connectors = <<D as Device>::Surface as Surface>::Connectors;
fn crtc(&self) -> crtc::Handle {
(*self.surface).crtc()
}
fn current_connectors(&self) -> Self::Connectors {
self.surface.current_connectors()
}
fn pending_connectors(&self) -> Self::Connectors {
self.surface.pending_connectors()
}
fn add_connector(&self, connector: connector::Handle) -> Result<()> {
self.surface.add_connector(connector).chain_err(|| ErrorKind::UnderlyingBackendError)
}
fn remove_connector(&self, connector: connector::Handle) -> Result<()> {
self.surface.remove_connector(connector).chain_err(|| ErrorKind::UnderlyingBackendError)
}
fn current_mode(&self) -> Mode {
self.surface.current_mode()
}
fn pending_mode(&self) -> Mode {
self.surface.pending_mode()
}
fn use_mode(&self, mode: Mode) -> Result<()> {
self.surface.use_mode(mode).chain_err(|| ErrorKind::UnderlyingBackendError)
}
}
impl<'a, B: Backend<Surface=<D as Device>::Surface> + 'static, D: Device + NativeDisplay<B> + 'static> CursorBackend<'a> for EglSurface<B, D>
where
D: CursorBackend<'a>,
<D as Device>::Surface: NativeSurface
{
type CursorFormat = <D as CursorBackend<'a>>::CursorFormat;
type Error = <D as CursorBackend<'a>>::Error;
fn set_cursor_position(&self, x: u32, y: u32) -> ::std::result::Result<(), Self::Error> {
self.dev.borrow().set_cursor_position(x, y)
}
fn set_cursor_representation<'b>(
&'b self,
buffer: Self::CursorFormat,
hotspot: (u32, u32),
) -> ::std::result::Result<(), Self::Error>
where 'a: 'b
{
let dev = self.dev.borrow();
dev.set_cursor_representation(buffer, hotspot)
}
}
impl<B: Backend<Surface=<D as Device>::Surface> + 'static, D: Device + NativeDisplay<B> + 'static> GLGraphicsBackend for EglSurface<B, D>
where <D as Device>::Surface: NativeSurface
{
fn swap_buffers(&self) -> ::std::result::Result<(), SwapBuffersError> {
self.surface.swap_buffers()
}
unsafe fn get_proc_address(&self, symbol: &str) -> *const c_void {
self.dev.borrow().get_proc_address(symbol)
}
fn get_framebuffer_dimensions(&self) -> (u32, u32) {
let (w, h) = self.pending_mode().size();
(w as u32, h as u32)
}
fn is_current(&self) -> bool {
self.dev.borrow().is_current() && self.surface.is_current()
}
unsafe fn make_current(&self) -> ::std::result::Result<(), SwapBuffersError> {
self.surface.make_current()
}
fn get_pixel_format(&self) -> PixelFormat {
self.dev.borrow().get_pixel_format()
}
}

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use backend::drm::{RawDevice, Device, RawSurface, Surface};
use backend::egl::native::{Backend, NativeDisplay, NativeSurface};
use backend::egl::error::{Result as EglResult};
use backend::egl::ffi;
use backend::graphics::SwapBuffersError;
use super::{GbmDevice, GbmSurface};
use super::error::{Error, Result};
use drm::control::{crtc, Device as ControlDevice, Mode};
use gbm::AsRaw;
use std::marker::PhantomData;
use std::rc::Rc;
use std::ptr;
/// Gbm backend type
pub struct Gbm<D: RawDevice + 'static>
where
<D as Device>::Return: ::std::borrow::Borrow<<D as RawDevice>::Surface>
{
_userdata: PhantomData<D>,
}
impl<D: RawDevice + 'static> Backend for Gbm<D>
where
<D as Device>::Return: ::std::borrow::Borrow<<D as RawDevice>::Surface>
{
type Surface = Rc<GbmSurface<D>>;
unsafe fn get_display<F>(
display: ffi::NativeDisplayType,
has_dp_extension: F,
log: ::slog::Logger,
) -> ffi::egl::types::EGLDisplay
where
F: Fn(&str) -> bool,
{
if has_dp_extension("EGL_KHR_platform_gbm") && ffi::egl::GetPlatformDisplay::is_loaded() {
trace!(log, "EGL Display Initialization via EGL_KHR_platform_gbm");
ffi::egl::GetPlatformDisplay(ffi::egl::PLATFORM_GBM_KHR, display as *mut _, ptr::null())
} else if has_dp_extension("EGL_MESA_platform_gbm") && ffi::egl::GetPlatformDisplayEXT::is_loaded() {
trace!(log, "EGL Display Initialization via EGL_MESA_platform_gbm");
ffi::egl::GetPlatformDisplayEXT(ffi::egl::PLATFORM_GBM_MESA, display as *mut _, ptr::null())
} else if has_dp_extension("EGL_MESA_platform_gbm") && ffi::egl::GetPlatformDisplay::is_loaded() {
trace!(log, "EGL Display Initialization via EGL_MESA_platform_gbm");
ffi::egl::GetPlatformDisplay(ffi::egl::PLATFORM_GBM_MESA, display as *mut _, ptr::null())
} else {
trace!(log, "Default EGL Display Initialization via GetDisplay");
ffi::egl::GetDisplay(display as *mut _)
}
}
}
/// Arguments necessary to construct a `GbmSurface`
pub struct SurfaceArguments<D: RawDevice + 'static>
where
<D as Device>::Return: ::std::borrow::Borrow<<D as RawDevice>::Surface>
{
/// Crtc
pub crtc: crtc::Handle,
/// Mode
pub mode: Mode,
/// Connectors
pub connectors: <GbmSurface<D> as Surface>::Connectors,
}
impl<D: RawDevice + 'static> From<(crtc::Handle, Mode, <GbmSurface<D> as Surface>::Connectors)> for SurfaceArguments<D>
where
<D as Device>::Return: ::std::borrow::Borrow<<D as RawDevice>::Surface>
{
fn from((crtc, mode, connectors): (crtc::Handle, Mode, <GbmSurface<D> as Surface>::Connectors)) -> Self {
SurfaceArguments {
crtc,
mode,
connectors,
}
}
}
unsafe impl<D: RawDevice + ControlDevice + 'static> NativeDisplay<Gbm<D>> for GbmDevice<D>
where
<D as Device>::Return: ::std::borrow::Borrow<<D as RawDevice>::Surface>
{
type Arguments = SurfaceArguments<D>;
type Error = Error;
fn is_backend(&self) -> bool {
true
}
fn ptr(&self) -> EglResult<ffi::NativeDisplayType> {
Ok(self.dev.borrow().as_raw() as *const _)
}
fn create_surface(&mut self, args: SurfaceArguments<D>) -> Result<Rc<GbmSurface<D>>> {
Device::create_surface(self, args.crtc, args.mode, args.connectors)
}
}
unsafe impl<D: RawDevice + 'static> NativeSurface for Rc<GbmSurface<D>>
where
<D as Device>::Return: ::std::borrow::Borrow<<D as RawDevice>::Surface>
{
fn ptr(&self) -> ffi::NativeWindowType {
self.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 ::std::borrow::Borrow::borrow(&self.crtc).commit_pending() {
self.recreate(flip).map_err(|_| SwapBuffersError::ContextLost)
} else {
self.page_flip(flip)
}
}
}

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//!
//! Errors thrown by the `DrmDevice` and `DrmBackend`
//!
error_chain! {
errors {
#[doc = "Creation of gbm device failed"]
InitFailed {
description("Creation of gbm device failed"),
display("Creation of gbm device failed"),
}
#[doc = "Creation of gbm surface failed"]
SurfaceCreationFailed {
description("Creation of gbm surface failed"),
display("Creation of gbm surface failed"),
}
#[doc = "Creation of gbm buffer object failed"]
BufferCreationFailed {
description("Creation of gbm buffer object failed"),
display("Creation of gbm buffer object failed"),
}
#[doc = "Writing to gbm buffer failed"]
BufferWriteFailed {
description("Writing to gbm buffer failed"),
display("Writing to gbm buffer failed"),
}
#[doc = "Lock of gbm surface front buffer failed"]
FrontBufferLockFailed {
description("Lock of gbm surface front buffer failed"),
display("Lock of gbm surface front buffer failed"),
}
#[doc = "Underlying backend failed"]
UnderlyingBackendError {
description("The underlying backend reported an error"),
display("The underlying backend reported an error"),
}
}
foreign_links {
FailedToSwap(::backend::graphics::SwapBuffersError);
}
}

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use super::{Device, RawDevice, Surface, DeviceHandler};
use drm::control::{crtc, framebuffer, Device as ControlDevice, Mode};
use gbm::{self, Format as GbmFormat, BufferObjectFlags};
use std::cell::{Cell, RefCell};
use std::collections::HashMap;
use std::rc::{Rc, Weak};
use std::sync::{Once, ONCE_INIT};
use std::os::unix::io::{AsRawFd, RawFd};
pub mod error;
use self::error::*;
mod surface;
pub use self::surface::GbmSurface;
pub mod egl;
#[cfg(feature = "backend_session")]
pub mod session;
static LOAD: Once = ONCE_INIT;
/// Representation of an open gbm device to create rendering backends
pub struct GbmDevice<D: RawDevice + ControlDevice + 'static>
where
<D as Device>::Return: ::std::borrow::Borrow<<D as RawDevice>::Surface>
{
pub(in self) dev: Rc<RefCell<gbm::Device<D>>>,
backends: Rc<RefCell<HashMap<crtc::Handle, Weak<GbmSurface<D>>>>>,
logger: ::slog::Logger,
}
impl<D: RawDevice + ControlDevice + 'static> GbmDevice<D>
where
<D as Device>::Return: ::std::borrow::Borrow<<D as RawDevice>::Surface>
{
/// Create a new `GbmDevice` from an open drm node
///
/// Returns an error if the file is no valid drm node or context creation was not
/// successful.
pub fn new<L>(mut dev: D, logger: L) -> Result<Self>
where
L: Into<Option<::slog::Logger>>,
{
/* GBM will load a dri driver, but even though they need symbols from
* libglapi, in some version of Mesa they are not linked to it. Since
* only the gl-renderer module links to it, these symbols won't be
* globally available, and loading the DRI driver fails.
* Workaround this by dlopen()'ing libglapi with RTLD_GLOBAL.
*/
LOAD.call_once(|| unsafe {
nix::libc::dlopen(
"libglapi.so.0".as_ptr() as *const _,
nix::libc::RTLD_LAZY | nix::libc::RTLD_GLOBAL,
);
});
let log = ::slog_or_stdlog(logger).new(o!("smithay_module" => "backend_gbm"));
dev.clear_handler();
debug!(log, "Creating gbm device");
Ok(GbmDevice {
// Open the gbm device from the drm device
dev: Rc::new(RefCell::new(gbm::Device::new(dev).chain_err(|| ErrorKind::InitFailed)?)),
backends: Rc::new(RefCell::new(HashMap::new())),
logger: log,
})
}
}
struct InternalDeviceHandler<D: RawDevice + ControlDevice + 'static>
where
<D as Device>::Return: ::std::borrow::Borrow<<D as RawDevice>::Surface>
{
handler: Box<DeviceHandler<Device=GbmDevice<D>> + 'static>,
backends: Weak<RefCell<HashMap<crtc::Handle, Weak<GbmSurface<D>>>>>,
logger: ::slog::Logger,
}
impl<D: RawDevice + ControlDevice + 'static> DeviceHandler for InternalDeviceHandler<D>
where
<D as Device>::Return: ::std::borrow::Borrow<<D as RawDevice>::Surface>
{
type Device = D;
fn vblank(&mut self, surface: &<D as Device>::Surface) {
if let Some(backends) = self.backends.upgrade() {
if let Some(surface) = backends.borrow().get(&surface.crtc()) {
if let Some(surface) = surface.upgrade() {
surface.unlock_buffer();
self.handler.vblank(&*surface);
}
} else {
warn!(self.logger, "Surface ({:?}) not managed by gbm, event not handled.", surface.crtc());
}
}
}
fn error(&mut self, error: <<D as Device>::Surface as Surface>::Error) {
self.handler.error(ResultExt::<()>::chain_err(Err(error), || ErrorKind::UnderlyingBackendError).unwrap_err())
}
}
impl<D: RawDevice + ControlDevice + 'static> Device for GbmDevice<D>
where
<D as Device>::Return: ::std::borrow::Borrow<<D as RawDevice>::Surface>
{
type Surface = GbmSurface<D>;
type Return = Rc<GbmSurface<D>>;
fn set_handler(&mut self, handler: impl DeviceHandler<Device=Self> + 'static) {
self.dev.borrow_mut().set_handler(InternalDeviceHandler {
handler: Box::new(handler),
backends: Rc::downgrade(&self.backends),
logger: self.logger.clone(),
});
}
fn clear_handler(&mut self) {
self.dev.borrow_mut().clear_handler();
}
fn create_surface(
&mut self,
crtc: crtc::Handle,
mode: Mode,
connectors: impl Into<<Self::Surface as Surface>::Connectors>
) -> Result<Rc<GbmSurface<D>>> {
info!(self.logger, "Initializing GbmSurface");
let (w, h) = mode.size();
let surface = self.dev.borrow().create_surface(
w as u32,
h as u32,
GbmFormat::XRGB8888,
BufferObjectFlags::SCANOUT | BufferObjectFlags::RENDERING,
).chain_err(|| ErrorKind::SurfaceCreationFailed)?;
// init the first screen
// (must be done before calling page_flip for the first time)
let mut front_bo = surface
.lock_front_buffer()
.chain_err(|| ErrorKind::FrontBufferLockFailed)?;
debug!(self.logger, "FrontBuffer color format: {:?}", front_bo.format());
// we need a framebuffer for the front buffer
let fb = framebuffer::create(&*self.dev.borrow(), &*front_bo).chain_err(|| ErrorKind::UnderlyingBackendError)?;
front_bo.set_userdata(fb).unwrap();
let cursor = Cell::new((
self.dev.borrow()
.create_buffer_object(
1,
1,
GbmFormat::ARGB8888,
BufferObjectFlags::CURSOR | BufferObjectFlags::WRITE,
).chain_err(|| ErrorKind::BufferCreationFailed)?,
(0, 0),
));
let backend = Rc::new(GbmSurface {
dev: self.dev.clone(),
surface: RefCell::new(surface),
crtc: Device::create_surface(&mut **self.dev.borrow_mut(), crtc, mode, connectors)
.chain_err(|| ErrorKind::UnderlyingBackendError)?,
cursor,
current_frame_buffer: Cell::new(fb),
front_buffer: Cell::new(front_bo),
next_buffer: Cell::new(None),
logger: self.logger.new(o!("crtc" => format!("{:?}", crtc))),
});
self.backends.borrow_mut().insert(crtc, Rc::downgrade(&backend));
Ok(backend)
}
fn process_events(&mut self) {
self.dev.borrow_mut().process_events()
}
}
impl<D: RawDevice + ControlDevice + 'static> AsRawFd for GbmDevice<D>
where
<D as Device>::Return: ::std::borrow::Borrow<<D as RawDevice>::Surface>
{
fn as_raw_fd(&self) -> RawFd {
self.dev.borrow().as_raw_fd()
}
}

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use drm::control::{crtc, Device as ControlDevice, ResourceInfo};
use gbm::BufferObject;
use std::cell::RefCell;
use std::collections::HashMap;
use std::rc::{Rc, Weak};
use std::os::unix::io::RawFd;
use backend::session::{AsSessionObserver, SessionObserver};
use backend::drm::{Device, RawDevice, RawSurface};
use super::{GbmDevice, GbmSurface};
/// `SessionObserver` linked to the `DrmDevice` it was created from.
pub struct GbmDeviceObserver<
S: SessionObserver + 'static,
D: RawDevice + ControlDevice + AsSessionObserver<S> + 'static,
>
where
<D as Device>::Return: ::std::borrow::Borrow<<D as RawDevice>::Surface>
{
observer: S,
backends: Weak<RefCell<HashMap<crtc::Handle, Weak<GbmSurface<D>>>>>,
logger: ::slog::Logger,
}
impl<
S: SessionObserver + 'static,
D: RawDevice + ControlDevice + AsSessionObserver<S> + 'static,
> AsSessionObserver<GbmDeviceObserver<S, D>> for GbmDevice<D>
where
<D as Device>::Return: ::std::borrow::Borrow<<D as RawDevice>::Surface>
{
fn observer(&mut self) -> GbmDeviceObserver<S, D> {
GbmDeviceObserver {
observer: (**self.dev.borrow_mut()).observer(),
backends: Rc::downgrade(&self.backends),
logger: self.logger.clone(),
}
}
}
impl<
S: SessionObserver + 'static,
D: RawDevice + ControlDevice + AsSessionObserver<S> + 'static,
> SessionObserver for GbmDeviceObserver<S, D>
where
<D as Device>::Return: ::std::borrow::Borrow<<D as RawDevice>::Surface>
{
fn pause(&mut self, devnum: Option<(u32, u32)>) {
self.observer.pause(devnum);
}
fn activate(&mut self, devnum: Option<(u32, u32, Option<RawFd>)>) {
self.observer.activate(devnum);
let mut crtcs = Vec::new();
if let Some(backends) = self.backends.upgrade() {
for (crtc, backend) in backends.borrow().iter() {
if let Some(backend) = backend.upgrade() {
// restart rendering loop
if let Err(err) =
::std::borrow::Borrow::borrow(&backend.crtc).page_flip(backend.current_frame_buffer.get().handle())
{
warn!(self.logger, "Failed to restart rendering loop. Error: {}", err);
}
// reset cursor
{
let &(ref cursor, ref hotspot): &(BufferObject<()>, (u32, u32)) =
unsafe { &*backend.cursor.as_ptr() };
if crtc::set_cursor2(
&*backend.dev.borrow(),
*crtc,
cursor,
((*hotspot).0 as i32, (*hotspot).1 as i32),
).is_err()
{
if let Err(err) = crtc::set_cursor(&*backend.dev.borrow(), *crtc, cursor) {
error!(self.logger, "Failed to reset cursor. Error: {}", err);
}
}
}
} else {
crtcs.push(*crtc);
}
}
for crtc in crtcs {
backends.borrow_mut().remove(&crtc);
}
}
}
}

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use super::error::*;
use super::super::{Device, RawDevice, Surface, RawSurface};
use drm::control::{crtc, connector, framebuffer, Mode, ResourceInfo};
use gbm::{self, SurfaceBufferHandle, Format as GbmFormat, BufferObject, BufferObjectFlags};
use image::{ImageBuffer, Rgba};
use std::cell::{Cell, RefCell};
use std::rc::Rc;
use std::os::unix::io::AsRawFd;
use backend::drm::legacy::{LegacyDrmDevice, LegacyDrmSurface};
use backend::graphics::CursorBackend;
use backend::graphics::SwapBuffersError;
pub struct GbmSurface<D: RawDevice + 'static>
where
<D as Device>::Return: ::std::borrow::Borrow<<D as RawDevice>::Surface>
{
pub(in super) dev: Rc<RefCell<gbm::Device<D>>>,
pub(in super) surface: RefCell<gbm::Surface<framebuffer::Info>>,
pub(in super) crtc: <D as Device>::Return,
pub(in super) cursor: Cell<(BufferObject<()>, (u32, u32))>,
pub(in super) current_frame_buffer: Cell<framebuffer::Info>,
pub(in super) front_buffer: Cell<SurfaceBufferHandle<framebuffer::Info>>,
pub(in super) next_buffer: Cell<Option<SurfaceBufferHandle<framebuffer::Info>>>,
pub(in super) logger: ::slog::Logger,
}
impl<D: RawDevice + 'static> GbmSurface<D>
where
<D as Device>::Return: ::std::borrow::Borrow<<D as RawDevice>::Surface>
{
pub(in 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(next_buffer);
// 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>
{
let res = {
let nb = self.next_buffer.take();
let res = nb.is_some();
self.next_buffer.set(nb);
res
};
if res {
// We cannot call lock_front_buffer anymore without releasing the previous buffer, which will happen when the page flip is done
warn!(
self.logger,
"Tried to swap with an already queued flip"
);
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.
// so we just assume we got at least two buffers to do flipping.
let mut next_bo = self
.surface
.borrow()
.lock_front_buffer()
.expect("Surface only has one front buffer. Not supported by smithay");
// create a framebuffer if the front buffer does not have one already
// (they are reused by gbm)
let maybe_fb = next_bo
.userdata()
.map_err(|_| SwapBuffersError::ContextLost)?
.cloned();
let fb = if let Some(info) = maybe_fb {
info
} else {
let fb = framebuffer::create(::std::borrow::Borrow::borrow(&self.crtc), &*next_bo)
.map_err(|_| SwapBuffersError::ContextLost)?;
next_bo.set_userdata(fb).unwrap();
fb
};
self.next_buffer.set(Some(next_bo));
trace!(self.logger, "Queueing Page flip");
::std::borrow::Borrow::borrow(&self.crtc).page_flip(fb.handle())?;
self.current_frame_buffer.set(fb);
Ok(())
}
pub fn recreate<F>(&self, flip: F) -> Result<()>
where
F: FnOnce() -> ::std::result::Result<(), SwapBuffersError>
{
let (w, h) = self.pending_mode().size();
// Recreate the surface and the related resources to match the new
// resolution.
debug!(
self.logger,
"Reinitializing surface for new mode: {}:{}", w, h
);
let surface = self
.dev
.borrow_mut()
.create_surface(
w as u32,
h as u32,
GbmFormat::XRGB8888,
BufferObjectFlags::SCANOUT | BufferObjectFlags::RENDERING,
).chain_err(|| ErrorKind::SurfaceCreationFailed)?;
flip()?;
// Clean up next_buffer
{
if let Some(mut old_bo) = self.next_buffer.take() {
if let Ok(Some(fb)) = old_bo.take_userdata() {
if let Err(err) = framebuffer::destroy(::std::borrow::Borrow::borrow(&self.crtc), fb.handle()) {
warn!(
self.logger,
"Error releasing old back_buffer framebuffer: {:?}", err
);
}
}
}
}
// 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 mut 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(::std::borrow::Borrow::borrow(&self.crtc), &*front_bo)
.chain_err(|| ErrorKind::UnderlyingBackendError)?;
::std::borrow::Borrow::borrow(&self.crtc).commit(fb.handle())
.chain_err(|| ErrorKind::UnderlyingBackendError)?;
front_bo.set_userdata(fb).unwrap();
front_bo
});
if let Ok(Some(fb)) = old_front_bo.take_userdata() {
if let Err(err) = framebuffer::destroy(::std::borrow::Borrow::borrow(&self.crtc), fb.handle()) {
warn!(
self.logger,
"Error releasing old front_buffer framebuffer: {:?}", err
);
}
}
// Drop the old surface after cleanup
*self.surface.borrow_mut() = surface;
Ok(())
}
}
impl<D: RawDevice + 'static> Surface for GbmSurface<D>
where
<D as Device>::Return: ::std::borrow::Borrow<<D as RawDevice>::Surface>
{
type Connectors = <<D as Device>::Surface as Surface>::Connectors;
type Error = Error;
fn crtc(&self) -> crtc::Handle {
::std::borrow::Borrow::borrow(&self.crtc)
.crtc()
}
fn current_connectors(&self) -> Self::Connectors {
::std::borrow::Borrow::borrow(&self.crtc)
.current_connectors()
}
fn pending_connectors(&self) -> Self::Connectors {
::std::borrow::Borrow::borrow(&self.crtc)
.pending_connectors()
}
fn add_connector(&self, connector: connector::Handle) -> Result<()> {
::std::borrow::Borrow::borrow(&self.crtc)
.add_connector(connector)
.chain_err(|| ErrorKind::UnderlyingBackendError)
}
fn remove_connector(&self, connector: connector::Handle) -> Result<()> {
::std::borrow::Borrow::borrow(&self.crtc)
.remove_connector(connector)
.chain_err(|| ErrorKind::UnderlyingBackendError)
}
fn current_mode(&self) -> Mode {
::std::borrow::Borrow::borrow(&self.crtc)
.current_mode()
}
fn pending_mode(&self) -> Mode {
::std::borrow::Borrow::borrow(&self.crtc)
.pending_mode()
}
fn use_mode(&self, mode: Mode) -> Result<()> {
::std::borrow::Borrow::borrow(&self.crtc)
.use_mode(mode)
.chain_err(|| ErrorKind::UnderlyingBackendError)
}
}
// FIXME:
//
// Option 1: When there is GAT support, impl `GraphicsBackend` for `LegacyDrmBackend`
// using a new generic `B: Buffer` and use this:
/*
impl<'a, D: RawDevice + 'static> CursorBackend<'a> for GbmSurface<D>
where
<D as Device>::Return: ::std::borrow::Borrow<<D as RawDevice>::Surface>,
<D as RawDevice>::Surface: CursorBackend<'a>,
<<D as RawDevice>::Surface as CursorBackend<'a>>::CursorFormat: Buffer,
<<D as RawDevice>::Surface as CursorBackend<'a>>::Error: ::std::error::Error + Send
{
*/
//
// Option 2: When equality checks in where clauses are supported, we could at least do this:
/*
impl<'a, D: RawDevice + 'static> GraphicsBackend<'a> for GbmSurface<D>
where
<D as Device>::Return: ::std::borrow::Borrow<<D as RawDevice>::Surface>,
<D as RawDevice>::Surface: CursorBackend<'a>,
<<D as RawDevice>::Surface as CursorBackend<'a>>::CursorFormat=&'a Buffer,
<<D as RawDevice>::Surface as CursorBackend<'a>>::Error: ::std::error::Error + Send
{
*/
// But for now got to do this:
impl<'a, A: AsRawFd + 'static> CursorBackend<'a> for GbmSurface<LegacyDrmDevice<A>> {
type CursorFormat = &'a ImageBuffer<Rgba<u8>, Vec<u8>>;
type Error = Error;
fn set_cursor_position(&self, x: u32, y: u32) -> Result<()> {
ResultExt::chain_err(
::std::borrow::Borrow::<Rc<LegacyDrmSurface<A>>>::borrow(&self.crtc)
.set_cursor_position(x, y),
|| ErrorKind::UnderlyingBackendError)
}
fn set_cursor_representation<'b>(
&'b self,
buffer: &ImageBuffer<Rgba<u8>, Vec<u8>>,
hotspot: (u32, u32),
) -> Result<()>
where 'a: 'b
{
let (w, h) = buffer.dimensions();
debug!(self.logger, "Importing cursor");
// import the cursor into a buffer we can render
let mut cursor = self
.dev
.borrow_mut()
.create_buffer_object(
w,
h,
GbmFormat::ARGB8888,
BufferObjectFlags::CURSOR | BufferObjectFlags::WRITE,
).chain_err(|| ErrorKind::BufferCreationFailed)?;
cursor
.write(&**buffer)
.chain_err(|| ErrorKind::BufferWriteFailed)?
.chain_err(|| ErrorKind::BufferWriteFailed)?;
trace!(self.logger, "Setting the new imported cursor");
ResultExt::chain_err(
::std::borrow::Borrow::<Rc<LegacyDrmSurface<A>>>::borrow(&self.crtc)
.set_cursor_representation(&cursor, hotspot),
|| ErrorKind::UnderlyingBackendError)?;
// and store it
self.cursor.set((cursor, hotspot));
Ok(())
}
}
impl<D: RawDevice + 'static> Drop for GbmSurface<D>
where
<D as Device>::Return: ::std::borrow::Borrow<<D as RawDevice>::Surface>
{
fn drop(&mut self) {
// Drop framebuffers attached to the userdata of the gbm surface buffers.
// (They don't implement drop, as they need the device)
if let Ok(Some(fb)) = {
if let Some(mut next) = self.next_buffer.take() {
next.take_userdata()
} else if let Ok(mut next) = self.surface.borrow().lock_front_buffer() {
next.take_userdata()
} else {
Ok(None)
}
} {
// ignore failure at this point
let _ = framebuffer::destroy(::std::borrow::Borrow::borrow(&self.crtc), fb.handle());
}
if let Ok(Some(fb)) = self.front_buffer.get_mut().take_userdata() {
// ignore failure at this point
let _ = framebuffer::destroy(::std::borrow::Borrow::borrow(&self.crtc), fb.handle());
}
}
}

19
src/backend/drm/error.rs → src/backend/drm/legacy/error.rs
View File

@ -1,8 +1,7 @@
//! //!
//! Errors thrown by the `DrmDevice` and `DrmBackend` //! Errors thrown by the `LegacyDrmDevice` and `LegacyDrmSurface`
//! //!
use backend::graphics::egl::error as egl;
use drm::control::{connector, crtc, Mode}; use drm::control::{connector, crtc, Mode};
error_chain! { error_chain! {
@ -23,18 +22,6 @@ error_chain! {
description("Unable to determine device id of drm device"), description("Unable to determine device id of drm device"),
} }
#[doc = "Creation of gbm resource failed"]
GbmInitFailed {
description("Creation of gbm resource failed"),
display("Creation of gbm resource failed"),
}
#[doc = "Swapping front buffers failed"]
FailedToSwap {
description("Swapping front buffers failed"),
display("Swapping front buffers failed"),
}
#[doc = "Device is currently paused"] #[doc = "Device is currently paused"]
DeviceInactive { DeviceInactive {
description("Device is currently paused, operation rejected"), description("Device is currently paused, operation rejected"),
@ -60,7 +47,7 @@ error_chain! {
} }
} }
links { foreign_links {
EGL(egl::Error, egl::ErrorKind) #[doc = "EGL error"]; FailedToSwap(::backend::graphics::SwapBuffersError) #[doc = "Swapping front buffers failed"];
} }
} }

257
src/backend/drm/legacy/mod.rs Normal file
View File

@ -0,0 +1,257 @@
use super::{Device, RawDevice, Surface, DeviceHandler, DevPath};
use drm::Device as BasicDevice;
use drm::control::{crtc, connector, encoder, Device as ControlDevice, Mode, ResourceInfo};
use nix::libc::dev_t;
use nix::sys::stat::fstat;
use std::cell::RefCell;
use std::collections::{HashMap, HashSet};
use std::rc::{Rc, Weak};
use std::os::unix::io::{AsRawFd, RawFd};
use std::sync::{Arc, RwLock};
use std::sync::atomic::{AtomicBool, Ordering};
mod surface;
pub use self::surface::LegacyDrmSurface;
use self::surface::State;
pub mod error;
use self::error::*;
#[cfg(feature = "backend_session")]
pub mod session;
pub struct LegacyDrmDevice<A: AsRawFd + 'static> {
dev: Rc<Dev<A>>,
dev_id: dev_t,
priviledged: bool,
active: Arc<AtomicBool>,
old_state: HashMap<crtc::Handle, (crtc::Info, Vec<connector::Handle>)>,
backends: Rc<RefCell<HashMap<crtc::Handle, Weak<LegacyDrmSurface<A>>>>>,
handler: Option<RefCell<Box<DeviceHandler<Device=LegacyDrmDevice<A>>>>>,
logger: ::slog::Logger,
}
pub(in crate::backend::drm) struct Dev<A: AsRawFd + 'static>(A);
impl<A: AsRawFd + 'static> AsRawFd for Dev<A> {
fn as_raw_fd(&self) -> RawFd {
self.0.as_raw_fd()
}
}
impl<A: AsRawFd + 'static> BasicDevice for Dev<A> {}
impl<A: AsRawFd + 'static> ControlDevice for Dev<A> {}
impl<A: AsRawFd + 'static> LegacyDrmDevice<A> {
/// Create a new `LegacyDrmDevice` from an open drm node
///
/// Returns an error if the file is no valid drm node or context creation was not
/// successful.
pub fn new<L>(dev: A, logger: L) -> Result<Self>
where
L: Into<Option<::slog::Logger>>,
{
let log = ::slog_or_stdlog(logger).new(o!("smithay_module" => "backend_drm"));
let dev_id = fstat(dev.as_raw_fd())
.chain_err(|| ErrorKind::UnableToGetDeviceId)?
.st_rdev;
let mut drm = LegacyDrmDevice {
// Open the drm device and create a context based on that
dev: Rc::new(Dev(dev)),
dev_id,
priviledged: true,
active: Arc::new(AtomicBool::new(true)),
old_state: HashMap::new(),
backends: Rc::new(RefCell::new(HashMap::new())),
handler: None,
logger: log.clone(),
};
info!(log, "DrmDevice initializing");
// we want to modeset, so we better be the master, if we run via a tty session
if drm.set_master().is_err() {
warn!(log, "Unable to become drm master, assuming unpriviledged mode");
drm.priviledged = false;
};
let res_handles = drm.resource_handles().chain_err(|| {
ErrorKind::DrmDev(format!("Error loading drm resources on {:?}", drm.dev_path()))
})?;
for &con in res_handles.connectors() {
let con_info = connector::Info::load_from_device(&drm, con).chain_err(|| {
ErrorKind::DrmDev(format!("Error loading connector info on {:?}", drm.dev_path()))
})?;
if let Some(enc) = con_info.current_encoder() {
let enc_info = encoder::Info::load_from_device(&drm, enc).chain_err(|| {
ErrorKind::DrmDev(format!("Error loading encoder info on {:?}", drm.dev_path()))
})?;
if let Some(crtc) = enc_info.current_crtc() {
let info = crtc::Info::load_from_device(&drm, crtc).chain_err(|| {
ErrorKind::DrmDev(format!("Error loading crtc info on {:?}", drm.dev_path()))
})?;
drm.old_state
.entry(crtc)
.or_insert((info, Vec::new()))
.1
.push(con);
}
}
}
Ok(drm)
}
pub fn dev_id(&self) -> dev_t {
self.dev_id
}
}
impl<A: AsRawFd + 'static> AsRawFd for LegacyDrmDevice<A> {
fn as_raw_fd(&self) -> RawFd {
self.dev.0.as_raw_fd()
}
}
impl<A: AsRawFd + 'static> BasicDevice for LegacyDrmDevice<A> {}
impl<A: AsRawFd + 'static> ControlDevice for LegacyDrmDevice<A> {}
impl<A: AsRawFd + 'static> Device for LegacyDrmDevice<A> {
type Surface = LegacyDrmSurface<A>;
type Return = Rc<LegacyDrmSurface<A>>;
fn set_handler(&mut self, handler: impl DeviceHandler<Device=Self> + 'static) {
self.handler = Some(RefCell::new(Box::new(handler)));
}
fn clear_handler(&mut self) {
let _ = self.handler.take();
}
fn create_surface(
&mut self,
crtc: crtc::Handle,
mode: Mode,
connectors: impl Into<<Self::Surface as Surface>::Connectors>
) -> Result<Rc<LegacyDrmSurface<A>>> {
if self.backends.borrow().contains_key(&crtc) {
bail!(ErrorKind::CrtcAlreadyInUse(crtc));
}
if !self.active.load(Ordering::SeqCst) {
bail!(ErrorKind::DeviceInactive);
}
let connectors: HashSet<_> = connectors.into();
// check if we have an encoder for every connector and the mode mode
for connector in &connectors {
let con_info = connector::Info::load_from_device(self, *connector).chain_err(|| {
ErrorKind::DrmDev(format!("Error loading connector info on {:?}", self.dev_path()))
})?;
// check the mode
if !con_info.modes().contains(&mode) {
bail!(ErrorKind::ModeNotSuitable(mode));
}
// check for every connector which encoders it does support
let encoders = con_info
.encoders()
.iter()
.map(|encoder| {
encoder::Info::load_from_device(self, *encoder).chain_err(|| {
ErrorKind::DrmDev(format!("Error loading encoder info on {:?}", self.dev_path()))
})
}).collect::<Result<Vec<encoder::Info>>>()?;
// and if any encoder supports the selected crtc
let resource_handles = self.resource_handles().chain_err(|| {
ErrorKind::DrmDev(format!("Error loading drm resources on {:?}", self.dev_path()))
})?;
if !encoders
.iter()
.map(|encoder| encoder.possible_crtcs())
.any(|crtc_list| resource_handles.filter_crtcs(crtc_list).contains(&crtc))
{
bail!(ErrorKind::NoSuitableEncoder(con_info, crtc))
}
}
// configuration is valid, the kernel will figure out the rest
let logger = self.logger.new(o!("crtc" => format!("{:?}", crtc)));
let state = State {
mode,
connectors,
};
let backend = Rc::new(LegacyDrmSurface {
dev: self.dev.clone(),
crtc,
state: RwLock::new(state.clone()),
pending: RwLock::new(state),
logger,
});
self.backends.borrow_mut().insert(crtc, Rc::downgrade(&backend));
Ok(backend)
}
fn process_events(&mut self) {
match crtc::receive_events(self) {
Ok(events) => for event in events {
if let crtc::Event::PageFlip(event) = event {
if self.active.load(Ordering::SeqCst) {
if let Some(backend) = self.backends.borrow().get(&event.crtc).iter().flat_map(|x| x.upgrade()).next() {
trace!(self.logger, "Handling event for backend {:?}", event.crtc);
if let Some(handler) = self.handler.as_ref() {
handler.borrow_mut().vblank(&backend);
}
} else {
self.backends.borrow_mut().remove(&event.crtc);
}
}
}
},
Err(err) => if let Some(handler) = self.handler.as_ref() {
handler.borrow_mut().error(ResultExt::<()>::chain_err(Err(err), ||
ErrorKind::DrmDev(format!("Error processing drm events on {:?}", self.dev_path()))
).unwrap_err());
}
}
}
}
impl<A: AsRawFd + 'static> RawDevice for LegacyDrmDevice<A> {
type Surface = LegacyDrmSurface<A>;
}
impl<A: AsRawFd + 'static> Drop for LegacyDrmDevice<A> {
fn drop(&mut self) {
self.backends.borrow_mut().clear();
if Rc::strong_count(&self.dev) > 1 {
panic!("Pending DrmBackends. You need to free all backends before the DrmDevice gets destroyed");
}
if self.active.load(Ordering::SeqCst) {
for (handle, (info, connectors)) in self.old_state.drain() {
if let Err(err) = crtc::set(
&*self.dev,
handle,
info.fb(),
&connectors,
info.position(),
info.mode(),
) {
error!(self.logger, "Failed to reset crtc ({:?}). Error: {}", handle, err);
}
}
if self.priviledged {
if let Err(err) = self.drop_master() {
error!(self.logger, "Failed to drop drm master state. Error: {}", err);
}
}
}
}
}

97
src/backend/drm/legacy/session.rs Normal file
View File

@ -0,0 +1,97 @@
use drm::Device as BasicDevice;
use drm::control::{crtc, connector, Device as ControlDevice};
use nix::libc::dev_t;
use nix::sys::stat;
use std::cell::RefCell;
use std::collections::HashMap;
use std::rc::{Rc, Weak};
use std::sync::Arc;
use std::sync::atomic::{AtomicBool, Ordering};
use std::os::unix::io::{AsRawFd, RawFd};
use backend::session::{AsSessionObserver, SessionObserver};
use super::{LegacyDrmDevice, LegacyDrmSurface, Dev};
/// `SessionObserver` linked to the `DrmDevice` it was created from.
pub struct LegacyDrmDeviceObserver<A: AsRawFd + 'static> {
dev: Weak<Dev<A>>,
dev_id: dev_t,
priviledged: bool,
active: Arc<AtomicBool>,
old_state: HashMap<crtc::Handle, (crtc::Info, Vec<connector::Handle>)>,
backends: Weak<RefCell<HashMap<crtc::Handle, Weak<LegacyDrmSurface<A>>>>>,
logger: ::slog::Logger,
}
impl<A: ControlDevice + 'static> AsSessionObserver<LegacyDrmDeviceObserver<A>> for LegacyDrmDevice<A> {
fn observer(&mut self) -> LegacyDrmDeviceObserver<A> {
LegacyDrmDeviceObserver {
dev: Rc::downgrade(&self.dev),
dev_id: self.dev_id,
old_state: self.old_state.clone(),
active: self.active.clone(),
priviledged: self.priviledged,
backends: Rc::downgrade(&self.backends),
logger: self.logger.clone(),
}
}
}
impl<A: ControlDevice + 'static> SessionObserver for LegacyDrmDeviceObserver<A> {
fn pause(&mut self, devnum: Option<(u32, u32)>) {
if let Some((major, minor)) = devnum {
if major as u64 != stat::major(self.dev_id) || minor as u64 != stat::minor(self.dev_id) {
return;
}
}
if let Some(device) = self.dev.upgrade() {
if let Some(backends) = self.backends.upgrade() {
for surface in backends.borrow().values().filter_map(Weak::upgrade) {
let _ = crtc::clear_cursor(&*device, surface.crtc);
}
}
for (handle, &(ref info, ref connectors)) in &self.old_state {
if let Err(err) = crtc::set(
&*device,
*handle,
info.fb(),
connectors,
info.position(),
info.mode(),
) {
error!(self.logger, "Failed to reset crtc ({:?}). Error: {}", handle, err);
}
}
}
self.active.store(false, Ordering::SeqCst);
if self.priviledged {
if let Some(device) = self.dev.upgrade() {
if let Err(err) = device.drop_master() {
error!(self.logger, "Failed to drop drm master state. Error: {}", err);
}
}
}
}
fn activate(&mut self, devnum: Option<(u32, u32, Option<RawFd>)>) {
if let Some((major, minor, fd)) = devnum {
if major as u64 != stat::major(self.dev_id) || minor as u64 != stat::minor(self.dev_id) {
return;
} else if let Some(fd) = fd {
info!(self.logger, "Replacing fd");
if let Some(device) = self.dev.upgrade() {
::nix::unistd::dup2(device.as_raw_fd(), fd)
.expect("Failed to replace file descriptor of drm device");
}
}
}
self.active.store(true, Ordering::SeqCst);
if self.priviledged {
if let Some(device) = self.dev.upgrade() {
if let Err(err) = device.set_master() {
crit!(self.logger, "Failed to acquire drm master again. Error: {}", err);
}
}
}
}
}

264
src/backend/drm/legacy/surface.rs Normal file
View File

@ -0,0 +1,264 @@
use drm::Device as BasicDevice;
use drm::control::{connector, crtc, encoder, framebuffer, Device as ControlDevice, Mode, ResourceInfo};
pub use drm::buffer::Buffer;
use std::collections::HashSet;
use std::rc::Rc;
use std::os::unix::io::{AsRawFd, RawFd};
use std::sync::RwLock;
use backend::drm::{RawSurface, Surface, DevPath};
use backend::graphics::CursorBackend;
use backend::graphics::SwapBuffersError;
use super::{Dev, error::*};
#[derive(Debug, PartialEq, Eq, Clone)]
pub struct State {
pub mode: Mode,
pub connectors: HashSet<connector::Handle>,
}
pub struct LegacyDrmSurface<A: AsRawFd + 'static> {
pub(in super) dev: Rc<Dev<A>>,
pub(in super) crtc: crtc::Handle,
pub(in super) state: RwLock<State>,
pub(in super) pending: RwLock<State>,
pub(in super) logger: ::slog::Logger,
}
impl<A: AsRawFd + 'static> AsRawFd for LegacyDrmSurface<A> {
fn as_raw_fd(&self) -> RawFd {
self.dev.as_raw_fd()
}
}
impl<A: AsRawFd + 'static> BasicDevice for LegacyDrmSurface<A> {}
impl<A: AsRawFd + 'static> ControlDevice for LegacyDrmSurface<A> {}
impl<'a, A: AsRawFd + 'static> CursorBackend<'a> for LegacyDrmSurface<A> {
type CursorFormat = &'a Buffer;
type Error = Error;
fn set_cursor_position(&self, x: u32, y: u32) -> Result<()> {
trace!(self.logger, "Move the cursor to {},{}", x, y);
crtc::move_cursor(self, self.crtc, (x as i32, y as i32)).chain_err(|| {
ErrorKind::DrmDev(format!(
"Error moving cursor on {:?}",
self.dev_path()
))
})
}
fn set_cursor_representation<'b>(
&'b self,
buffer: Self::CursorFormat,
hotspot: (u32, u32),
) -> Result<()>
where 'a: 'b
{
trace!(self.logger, "Setting the new imported cursor");
if crtc::set_cursor2(
self,
self.crtc,
buffer,
(hotspot.0 as i32, hotspot.1 as i32),
).is_err()
{
crtc::set_cursor(self, self.crtc, buffer).chain_err(|| {
ErrorKind::DrmDev(format!(
"Failed to set cursor on {:?}",
self.dev_path()
))
})?;
}
Ok(())
}
}
impl<A: AsRawFd + 'static> Surface for LegacyDrmSurface<A> {
type Error = Error;
type Connectors = HashSet<connector::Handle>;
fn crtc(&self) -> crtc::Handle {
self.crtc
}
fn current_connectors(&self) -> Self::Connectors {
self.state.read().unwrap().connectors.clone()
}
fn pending_connectors(&self) -> Self::Connectors {
self.pending.read().unwrap().connectors.clone()
}
fn current_mode(&self) -> Mode {
self.state.read().unwrap().mode.clone()
}
fn pending_mode(&self) -> Mode {
self.pending.read().unwrap().mode.clone()
}
fn add_connector(&self, connector: connector::Handle) -> Result<()> {
let info = connector::Info::load_from_device(self, connector).chain_err(|| {
ErrorKind::DrmDev(format!(
"Error loading connector info on {:?}",
self.dev_path()
))
})?;
let mut pending = self.pending.write().unwrap();
// check if the connector can handle the current mode
if info.modes().contains(&pending.mode) {
// check if there is a valid encoder
let encoders = info
.encoders()
.iter()
.map(|encoder| {
encoder::Info::load_from_device(self, *encoder).chain_err(|| {
ErrorKind::DrmDev(format!(
"Error loading encoder info on {:?}",
self.dev_path()
))
})
}).collect::<Result<Vec<encoder::Info>>>()?;
// and if any encoder supports the selected crtc
let resource_handles = self.resource_handles().chain_err(|| {
ErrorKind::DrmDev(format!(
"Error loading resources on {:?}",
self.dev_path()
))
})?;
if !encoders
.iter()
.map(|encoder| encoder.possible_crtcs())
.all(|crtc_list| {
resource_handles
.filter_crtcs(crtc_list)
.contains(&self.crtc)
}) {
bail!(ErrorKind::NoSuitableEncoder(info, self.crtc));
}
pending.connectors.insert(connector);
Ok(())
} else {
bail!(ErrorKind::ModeNotSuitable(pending.mode));
}
}
fn remove_connector(&self, connector: connector::Handle) -> Result<()> {
self.pending.write().unwrap().connectors.remove(&connector);
Ok(())
}
fn use_mode(&self, mode: Mode) -> Result<()> {
let mut pending = self.pending.write().unwrap();
// check the connectors
for connector in &pending.connectors {
if !connector::Info::load_from_device(self, *connector)
.chain_err(|| {
ErrorKind::DrmDev(format!(
"Error loading connector info on {:?}",
self.dev_path()
))
})?.modes()
.contains(&mode)
{
bail!(ErrorKind::ModeNotSuitable(mode));
}
}
pending.mode = mode;
Ok(())
}
}
impl<A: AsRawFd + 'static> RawSurface for LegacyDrmSurface<A> {
fn commit_pending(&self) -> bool {
*self.pending.read().unwrap() != *self.state.read().unwrap()
}
fn commit(&self, framebuffer: framebuffer::Handle) -> Result<()> {
let mut current = self.state.write().unwrap();
let pending = self.pending.read().unwrap();
{
let removed = current.connectors.difference(&pending.connectors);
let added = pending.connectors.difference(&current.connectors);
for conn in removed {
if let Ok(info) = connector::Info::load_from_device(self, *conn) {
info!(
self.logger,
"Removing connector: {:?}",
info.connector_type()
);
} else {
info!(self.logger, "Removing unknown connector");
}
}
for conn in added {
if let Ok(info) = connector::Info::load_from_device(self, *conn) {
info!(
self.logger,
"Adding connector: {:?}",
info.connector_type()
);
} else {
info!(self.logger, "Adding unknown connector");
}
}
if current.mode != pending.mode {
info!(self.logger, "Setting new mode: {:?}", pending.mode.name());
}
}
debug!(self.logger, "Setting screen");
crtc::set(
self,
self.crtc,
framebuffer,
&pending.connectors.iter().map(|x| *x).collect::<Vec<connector::Handle>>(),
(0, 0),
Some(pending.mode),
).chain_err(|| {
ErrorKind::DrmDev(format!(
"Error setting crtc {:?} on {:?}",
self.crtc,
self.dev_path()
))
})?;
*current = pending.clone();
Ok(())
}
fn page_flip(&self, framebuffer: framebuffer::Handle) -> ::std::result::Result<(), SwapBuffersError> {
trace!(self.logger, "Queueing Page flip");
crtc::page_flip(
self,
self.crtc,
framebuffer,
&[crtc::PageFlipFlags::PageFlipEvent],
).map_err(|_| SwapBuffersError::ContextLost)
}
}
impl<A: AsRawFd + 'static> Drop for LegacyDrmSurface<A> {
fn drop(&mut self) {
// ignore failure at this point
let _ = crtc::clear_cursor(self, self.crtc);
}
}

747
src/backend/drm/mod.rs
View File

@ -1,454 +1,77 @@
//! Drm/Kms types and backend implementations use drm::Device as BasicDevice;
//! use drm::control::Device as ControlDevice;
//! This module provide a `DrmDevice` which acts as a representation for any DRM pub use drm::control::crtc;
//! device and can be used to create the second provided structure a `DrmBackend`. pub use drm::control::connector;
//! pub use drm::control::framebuffer;
//! Initialization happens through the types provided by [`drm-rs`](https://docs.rs/drm/). pub use drm::control::Mode;
//!
//! Three entities are relevant for the initialization procedure.
//!
//! "Crtc"s represent scanout engines of the device pointer to one framebuffer. There responsibility
//! is to read the data of the framebuffer and export it into an "Encoder". The number of crtc's
//! represent the number of independent output devices the hardware may handle.
//!
//! An "Encoder" encodes the data of connected crtcs into a video signal for a fixed set
//! of connectors. E.g. you might have an analog encoder based on a DAG for VGA ports, but another
//! one for digital ones. Also not every encoder might be connected to every crtc.
//!
//! The last entity the "Connector" represents a port on your computer, possibly with a connected
//! monitor, TV, capture card, etc.
//!
//! The `DrmBackend` created from a `DrmDevice` represents a crtc of the device you can render to
//! and that feeds a given set of connectors, that can be manipulated at runtime.
//!
//! From these circumstances it becomes clear, that one crtc might only send it's data to a connector,
//! that is attached to any encoder that is attached to the crtc itself. It is the responsibility of the
//! user to ensure that a given set of a crtc with it's connectors is valid or an error will be thrown.
//!
//! For more details refer to the [`drm-rs` documentation](https://docs.rs/drm).
//!
//!
//! ## How to use it
//!
//! ### Initialization
//!
//! To initialize the `DrmDevice` you need either a `RawFd` or a `File` of
//! your DRM node. The `File` is recommended as it represents the save API.
//!
//! Once you got your `DrmDevice` you can then use it to create `DrmBackend`s.
//! You will need to use the `drm` crate to provide the required types to create
//! a backend.
//!
//! ```rust,no_run
//! extern crate drm;
//! extern crate smithay;
//! extern crate wayland_server;
//!
//! use drm::Device as BasicDevice;
//! use drm::control::{Device as ControlDevice, ResourceInfo};
//! use drm::control::connector::{Info as ConnectorInfo, State as ConnectorState};
//! use drm::control::encoder::{Info as EncoderInfo};
//! use std::fs::{File, OpenOptions};
//! use std::os::unix::io::RawFd;
//! use std::os::unix::io::AsRawFd;
//! use smithay::backend::drm::{DrmDevice, DrmBackend};
//!
//! #[derive(Debug)]
//! pub struct Card(File);
//!
//! impl AsRawFd for Card {
//! fn as_raw_fd(&self) -> RawFd {
//! self.0.as_raw_fd()
//! }
//! }
//!
//! impl BasicDevice for Card {}
//! impl ControlDevice for Card {}
//!
//! # fn main() {
//! // Open the drm device
//! let mut options = OpenOptions::new();
//! options.read(true);
//! options.write(true);
//! let mut device = DrmDevice::new(
//! Card(options.open("/dev/dri/card0").unwrap()), // try to detect it properly
//! None /*put a logger here*/
//! ).unwrap();
//!
//! // Get a set of all modesetting resource handles
//! let res_handles = device.resource_handles().unwrap();
//!
//! // Use first connected connector for this example
//! let connector_info = res_handles.connectors().iter()
//! .map(|conn| ConnectorInfo::load_from_device(&device, *conn).unwrap())
//! .find(|conn| conn.connection_state() == ConnectorState::Connected)
//! .unwrap();
//!
//! // Use the first encoder
//! let encoder_info = EncoderInfo::load_from_device(&device, connector_info.encoders()[0]).unwrap();
//!
//! // use the connected crtc if any
//! let crtc = encoder_info.current_crtc()
//! // or use the first one that is compatible with the encoder
//! .unwrap_or_else(||
//! *res_handles.filter_crtcs(encoder_info.possible_crtcs())
//! .iter()
//! .next()
//! .unwrap());
//!
//! // Use first mode (usually the highest resolution)
//! let mode = connector_info.modes()[0];
//!
//! // Create the backend
//! let backend = device.create_backend(
//! crtc,
//! mode,
//! vec![connector_info.handle()]
//! ).unwrap();
//! # }
//! ```
//!
//! ### Page Flips / Tear-free video
//! Calling the usual `EglGraphicsBackend::swap_buffers` function on a
//! `DrmBackend` works the same to finish the rendering, but will return
//! `SwapBuffersError::AlreadySwapped` for any new calls until the page flip of the
//! crtc has happened.
//!
//! You can monitor the page flips by registering the `DrmDevice` as and
//! `FdEventSourceHandler` and setting a `DrmHandler` on it. You will be notified
//! whenever a page flip has happened, so you can render the next frame immediately
//! and get a tear-free representation on the display.
//!
//! You need to render at least once to successfully trigger the first event.
//!
//! ```rust,no_run
//! # extern crate drm;
//! # extern crate smithay;
//! # extern crate wayland_server;
//! #
//! # use drm::Device as BasicDevice;
//! # use drm::control::{Device as ControlDevice, ResourceInfo};
//! # use drm::control::connector::{Info as ConnectorInfo, State as ConnectorState};
//! use drm::control::crtc::{Handle as CrtcHandle};
//! use drm::result::Error as DrmError;
//! # use std::fs::{File, OpenOptions};
//! # use std::os::unix::io::RawFd;
//! # use std::os::unix::io::AsRawFd;
//! # use std::time::Duration;
//! use smithay::backend::drm::{DrmDevice, DrmBackend, DrmHandler, drm_device_bind};
//! use smithay::backend::graphics::egl::EGLGraphicsBackend;
//! #
//! # #[derive(Debug)]
//! # pub struct Card(File);
//! # impl AsRawFd for Card {
//! # fn as_raw_fd(&self) -> RawFd {
//! # self.0.as_raw_fd()
//! # }
//! # }
//! # impl BasicDevice for Card {}
//! # impl ControlDevice for Card {}
//! #
//! # fn main() {
//! #
//! # let mut event_loop = wayland_server::calloop::EventLoop::<()>::new().unwrap();
//! # let mut display = wayland_server::Display::new(event_loop.handle());
//! #
//! # let mut options = OpenOptions::new();
//! # options.read(true);
//! # options.write(true);
//! # let mut device = DrmDevice::new(
//! # Card(options.open("/dev/dri/card0").unwrap()), // try to detect it properly
//! # None /*put a logger here*/
//! # ).unwrap();
//! #
//! # let res_handles = device.resource_handles().unwrap();
//! # let connector_info = res_handles.connectors().iter()
//! # .map(|conn| ConnectorInfo::load_from_device(&device, *conn).unwrap())
//! # .find(|conn| conn.connection_state() == ConnectorState::Connected)
//! # .unwrap();
//! # let crtc = res_handles.crtcs()[0];
//! # let mode = connector_info.modes()[0];
//! # let backend = device.create_backend(
//! # crtc,
//! # mode,
//! # vec![connector_info.handle()]
//! # ).unwrap();
//!
//! struct MyDrmHandler(DrmBackend<Card>);
//!
//! impl DrmHandler<Card> for MyDrmHandler {
//! fn ready(
//! &mut self,
//! _device: &mut DrmDevice<Card>,
//! _crtc: CrtcHandle,
//! _frame: u32,
//! _duration: Duration)
//! {
//! // render surfaces and swap again
//! self.0.swap_buffers().unwrap();
//! }
//! fn error(
//! &mut self,
//! device: &mut DrmDevice<Card>,
//! error: DrmError)
//! {
//! panic!("DrmDevice errored: {}", error);
//! }
//! }
//!
//! // render something (like clear_color)
//! backend.swap_buffers().unwrap();
//!
//! let (_source, _device_rc) = drm_device_bind(
//! &event_loop.handle(),
//! device,
//! MyDrmHandler(backend)
//! ).map_err(|(err, _)| err).unwrap();
//!
//! /* And then run the event loop once all your setup is done */
//! # }
//! ```
use backend::graphics::egl::{ use std::borrow::Borrow;
context::{EGLContext, GlAttributes}, use std::error::Error;
error::Result as EGLResult, use std::path::PathBuf;
native::Gbm, use std::os::unix::io::AsRawFd;
wayland::{EGLDisplay, EGLWaylandExtensions},
};
#[cfg(feature = "backend_session")]
use backend::session::{AsSessionObserver, SessionObserver};
use drm::{
control::{connector, crtc, encoder, framebuffer, Device as ControlDevice, Mode, ResourceInfo},
result::Error as DrmError,
Device as BasicDevice,
};
use gbm::{BufferObject, Device as GbmDevice};
use nix::{
self,
sys::stat::{self, dev_t, fstat},
};
use std::{
cell::RefCell,
collections::HashMap,
hash::{Hash, Hasher},
io::Error as IoError,
os::unix::io::{AsRawFd, RawFd},
path::PathBuf,
rc::{Rc, Weak},
sync::{
atomic::{AtomicBool, Ordering},
Arc, Once, ONCE_INIT,
},
time::Duration,
};
use wayland_server::{ use wayland_server::calloop::generic::{EventedFd, Generic};
calloop::{ use wayland_server::calloop::{LoopHandle, Source};
generic::{EventedRawFd, Generic}, use wayland_server::calloop::mio::Ready;
mio::Ready, pub use wayland_server::calloop::InsertError;
LoopHandle, Source,
},
Display,
};
mod backend; use super::graphics::SwapBuffersError;
pub mod error;
pub use self::backend::DrmBackend; #[cfg(feature = "backend_drm_legacy")]
use self::{backend::DrmBackendInternal, error::*}; pub mod legacy;
#[cfg(feature = "backend_drm_gbm")]
pub mod gbm;
#[cfg(feature = "backend_drm_egl")]
pub mod egl;
static LOAD: Once = ONCE_INIT; pub trait DeviceHandler {
type Device: Device + ?Sized;
/// Representation of an open DRM device node to create rendering backends fn vblank(&mut self, surface: &<<Self as DeviceHandler>::Device as Device>::Surface);
pub struct DrmDevice<A: ControlDevice + 'static> { fn error(&mut self, error: <<<Self as DeviceHandler>::Device as Device>::Surface as Surface>::Error);
context: Rc<EGLContext<Gbm<framebuffer::Info>, GbmDevice<A>>>,
old_state: HashMap<crtc::Handle, (crtc::Info, Vec<connector::Handle>)>,
device_id: dev_t,
backends: Rc<RefCell<HashMap<crtc::Handle, Weak<DrmBackendInternal<A>>>>>,
active: Arc<AtomicBool>,
privileged: bool,
logger: ::slog::Logger,
} }
impl<A: ControlDevice + 'static> DrmDevice<A> { pub trait Device: AsRawFd + DevPath {
/// Create a new `DrmDevice` from an open DRM node type Surface: Surface;
/// type Return: Borrow<Self::Surface>;
/// Returns an error if the file is no valid DRM node or context creation was not
/// successful.
pub fn new<L>(dev: A, logger: L) -> Result<Self>
where
L: Into<Option<::slog::Logger>>,
{
DrmDevice::new_with_gl_attr(
dev,
GlAttributes {
version: None,
profile: None,
debug: cfg!(debug_assertions),
vsync: true,
},
logger,
)
}
/// Create a new `DrmDevice` from an open DRM node and given `GlAttributes` fn set_handler(&mut self, handler: impl DeviceHandler<Device=Self> + 'static);
/// fn clear_handler(&mut self);
/// Returns an error if the file is no valid DRM node or context creation was not fn create_surface(
/// successful.
pub fn new_with_gl_attr<L>(dev: A, attributes: GlAttributes, logger: L) -> Result<Self>
where
L: Into<Option<::slog::Logger>>,
{
let log = ::slog_or_stdlog(logger).new(o!("smithay_module" => "backend_drm"));
/* GBM will load a dri driver, but even though they need symbols from
* libglapi, in some version of Mesa they are not linked to it. Since
* only the gl-renderer module links to it, these symbols won't be globally available,
* and loading the DRI driver fails.
* Workaround this by dlopen()'ing libglapi with RTLD_GLOBAL.
*/
LOAD.call_once(|| unsafe {
nix::libc::dlopen(
"libglapi.so.0".as_ptr() as *const _,
nix::libc::RTLD_LAZY | nix::libc::RTLD_GLOBAL,
);
});
let device_id = fstat(dev.as_raw_fd())
.chain_err(|| ErrorKind::UnableToGetDeviceId)?
.st_rdev;
let mut drm = DrmDevice {
// Open the gbm device from the DRM device and create a context based on that
context: Rc::new(
EGLContext::new(
{
debug!(log, "Creating gbm device");
let gbm = GbmDevice::new(dev).chain_err(|| ErrorKind::GbmInitFailed)?;
debug!(log, "Creating egl context from gbm device");
gbm
},
attributes,
Default::default(),
log.clone(),
).map_err(Error::from)?,
),
backends: Rc::new(RefCell::new(HashMap::new())),
device_id,
old_state: HashMap::new(),
active: Arc::new(AtomicBool::new(true)),
privileged: true,
logger: log.clone(),
};
info!(log, "DrmDevice initializing");
// we want to mode-set, so we better be the master, if we run via a tty session
if drm.set_master().is_err() {
warn!(log, "Unable to become drm master, assuming unprivileged mode");
drm.privileged = false;
};
let res_handles = drm.resource_handles().chain_err(|| {
ErrorKind::DrmDev(format!("Error loading drm resources on {:?}", drm.dev_path()))
})?;
for &con in res_handles.connectors() {
let con_info = connector::Info::load_from_device(&drm, con).chain_err(|| {
ErrorKind::DrmDev(format!("Error loading connector info on {:?}", drm.dev_path()))
})?;
if let Some(enc) = con_info.current_encoder() {
let enc_info = encoder::Info::load_from_device(&drm, enc).chain_err(|| {
ErrorKind::DrmDev(format!("Error loading encoder info on {:?}", drm.dev_path()))
})?;
if let Some(crtc) = enc_info.current_crtc() {
let info = crtc::Info::load_from_device(&drm, crtc).chain_err(|| {
ErrorKind::DrmDev(format!("Error loading crtc info on {:?}", drm.dev_path()))
})?;
drm.old_state
.entry(crtc)
.or_insert((info, Vec::new()))
.1
.push(con);
}
}
}
Ok(drm)
}
/// Create a new backend on a given crtc with a given `Mode` for a given amount
/// of `connectors` (mirroring).
///
/// Errors if initialization fails or the mode is not available on all given
/// connectors.
pub fn create_backend<I>(
&mut self, &mut self,
crtc: crtc::Handle, ctrc: crtc::Handle,
mode: Mode, mode: Mode,
connectors: I, connectors: impl Into<<Self::Surface as Surface>::Connectors>
) -> Result<DrmBackend<A>> ) -> Result<Self::Return, <Self::Surface as Surface>::Error>;
where fn process_events(&mut self);
I: Into<Vec<connector::Handle>>,
{
if self.backends.borrow().contains_key(&crtc) {
bail!(ErrorKind::CrtcAlreadyInUse(crtc));
}
if !self.active.load(Ordering::SeqCst) {
bail!(ErrorKind::DeviceInactive);
}
// check if the given connectors and crtc match
let connectors = connectors.into();
// check if we have an encoder for every connector and the mode mode
for connector in &connectors {
let con_info = connector::Info::load_from_device(self, *connector).chain_err(|| {
ErrorKind::DrmDev(format!("Error loading connector info on {:?}", self.dev_path()))
})?;
// check the mode
if !con_info.modes().contains(&mode) {
bail!(ErrorKind::ModeNotSuitable(mode));
}
// check for every connector which encoders it does support
let encoders = con_info
.encoders()
.iter()
.map(|encoder| {
encoder::Info::load_from_device(self, *encoder).chain_err(|| {
ErrorKind::DrmDev(format!("Error loading encoder info on {:?}", self.dev_path()))
})
}).collect::<Result<Vec<encoder::Info>>>()?;
// and if any encoder supports the selected crtc
let resource_handles = self.resource_handles().chain_err(|| {
ErrorKind::DrmDev(format!("Error loading drm resources on {:?}", self.dev_path()))
})?;
if !encoders
.iter()
.map(|encoder| encoder.possible_crtcs())
.any(|crtc_list| resource_handles.filter_crtcs(crtc_list).contains(&crtc))
{
bail!(ErrorKind::NoSuitableEncoder(con_info, crtc))
}
}
// configuration is valid, the kernel will figure out the rest
let logger = self.logger.new(o!("crtc" => format!("{:?}", crtc)));
let backend = DrmBackend::new(self.context.clone(), crtc, mode, connectors, logger)?;
self.backends.borrow_mut().insert(crtc, backend.weak());
Ok(backend)
}
/// Returns an internal device id, that is unique per boot per system
pub fn device_id(&self) -> u64 {
self.device_id
}
} }
pub trait RawDevice: Device<Surface=<Self as RawDevice>::Surface>
where
<Self as Device>::Return: Borrow<<Self as RawDevice>::Surface>
{
type Surface: RawSurface;
}
pub trait Surface {
type Connectors: IntoIterator<Item=connector::Handle>;
type Error: Error + Send;
fn crtc(&self) -> crtc::Handle;
fn current_connectors(&self) -> Self::Connectors;
fn pending_connectors(&self) -> Self::Connectors;
fn add_connector(&self, connector: connector::Handle) -> Result<(), Self::Error>;
fn remove_connector(&self, connector: connector::Handle) -> Result<(), Self::Error>;
fn current_mode(&self) -> Mode;
fn pending_mode(&self) -> Mode;
fn use_mode(&self, mode: Mode) -> Result<(), Self::Error>;
}
pub trait RawSurface: Surface + ControlDevice + BasicDevice {
fn commit_pending(&self) -> bool;
fn commit(&self, framebuffer: framebuffer::Handle) -> Result<(), <Self as Surface>::Error>;
fn page_flip(&self, framebuffer: framebuffer::Handle) -> Result<(), SwapBuffersError>;
}
/// Trait for types representing open devices /// Trait for types representing open devices
pub trait DevPath { pub trait DevPath {
/// Returns the path of the open device if possible /// Returns the path of the open device if possible
@ -459,247 +82,25 @@ impl<A: AsRawFd> DevPath for A {
fn dev_path(&self) -> Option<PathBuf> { fn dev_path(&self) -> Option<PathBuf> {
use std::fs; use std::fs;
fs::read_link(format!("/proc/self/fd/{:?}", self.as_raw_fd())).ok() fs::read_link(format!("/proc/self/fd/{:?}", self.as_raw_fd())).ok()
} }
} }
impl<A: ControlDevice + 'static> PartialEq for DrmDevice<A> { /// Bind a `Device` to an `EventLoop`,
fn eq(&self, other: &DrmDevice<A>) -> bool {
self.device_id == other.device_id
}
}
impl<A: ControlDevice + 'static> Eq for DrmDevice<A> {}
impl<A: ControlDevice + 'static> Hash for DrmDevice<A> {
fn hash<H: Hasher>(&self, state: &mut H) {
self.device_id.hash(state);
}
}
// for users convenience and FdEventSource registering
impl<A: ControlDevice + 'static> AsRawFd for DrmDevice<A> {
fn as_raw_fd(&self) -> RawFd {
self.context.as_raw_fd()
}
}
impl<A: ControlDevice + 'static> BasicDevice for DrmDevice<A> {}
impl<A: ControlDevice + 'static> ControlDevice for DrmDevice<A> {}
impl<A: ControlDevice + 'static> EGLWaylandExtensions for DrmDevice<A> {
fn bind_wl_display(&self, display: &Display) -> EGLResult<EGLDisplay> {
self.context.bind_wl_display(display)
}
}
impl<A: ControlDevice + 'static> Drop for DrmDevice<A> {
fn drop(&mut self) {
if Rc::strong_count(&self.context) > 1 {
panic!("Pending DrmBackends. You need to free all backends before the DrmDevice gets destroyed");
}
for (handle, (info, connectors)) in self.old_state.drain() {
if let Err(err) = crtc::set(
&*self.context,
handle,
info.fb(),
&connectors,
info.position(),
info.mode(),
) {
error!(self.logger, "Failed to reset crtc ({:?}). Error: {}", handle, err);
}
}
if self.privileged {
if let Err(err) = self.drop_master() {
error!(self.logger, "Failed to drop drm master state. Error: {}", err);
}
}
}
}
/// Handler for DRM node events
/// ///
/// See module-level documentation for its use /// This will cause it to recieve events and feed them into an `DeviceHandler`
pub trait DrmHandler<A: ControlDevice + 'static> { pub fn device_bind<D: Device + 'static, Data>(
/// The `DrmBackend` of crtc has finished swapping buffers and new frame can now
/// (and should be immediately) be rendered.
fn ready(&mut self, device: &mut DrmDevice<A>, crtc: crtc::Handle, frame: u32, duration: Duration);
/// The `DrmDevice` has thrown an error.
///
/// The related backends are most likely *not* usable anymore and
/// the whole stack has to be recreated..
fn error(&mut self, device: &mut DrmDevice<A>, error: DrmError);
}
/// Bind a `DrmDevice` to an `EventLoop`,
///
/// This will cause it to recieve events and feed them into an `DrmHandler`
pub fn drm_device_bind<A, H, Data: 'static>(
handle: &LoopHandle<Data>, handle: &LoopHandle<Data>,
device: DrmDevice<A>, device: D,
mut handler: H, ) -> ::std::result::Result<Source<Generic<EventedFd<D>>>, InsertError<Generic<EventedFd<D>>>>
) -> ::std::result::Result<(Source<Generic<EventedRawFd>>, Rc<RefCell<DrmDevice<A>>>), (IoError, DrmDevice<A>)>
where where
A: ControlDevice + 'static, D: Device,
H: DrmHandler<A> + 'static, Data: 'static,
{ {
let fd = device.as_raw_fd(); let mut source = Generic::from_fd_source(device);
let device = Rc::new(RefCell::new(device));
let mut source = Generic::from_raw_fd(fd);
source.set_interest(Ready::readable()); source.set_interest(Ready::readable());
match handle.insert_source(source, { handle.insert_source(source, |evt, _| {
let device = device.clone(); evt.source.borrow_mut().0.process_events();
move |_evt, _| { })
let mut device = device.borrow_mut();
process_events(&mut *device, &mut handler);
}
}) {
Ok(source) => Ok((source, device)),
Err(e) => {
let device = Rc::try_unwrap(device).unwrap_or_else(|_| unreachable!());
Err((e.into(), device.into_inner()))
}
}
}
fn process_events<A, H>(device: &mut DrmDevice<A>, handler: &mut H)
where
A: ControlDevice + 'static,
H: DrmHandler<A> + 'static,
{
match crtc::receive_events(&*device) {
Ok(events) => for event in events {
if let crtc::Event::PageFlip(event) = event {
if device.active.load(Ordering::SeqCst) {
let backends = device.backends.borrow().clone();
if let Some(backend) = backends.get(&event.crtc).iter().flat_map(|x| x.upgrade()).next() {
// we can now unlock the buffer
backend.unlock_buffer();
trace!(device.logger, "Handling event for backend {:?}", event.crtc);
// and then call the user to render the next frame
handler.ready(device, event.crtc, event.frame, event.duration);
} else {
device.backends.borrow_mut().remove(&event.crtc);
}
}
}
},
Err(err) => handler.error(device, err),
}
}
/// `SessionObserver` linked to the `DrmDevice` it was created from.
pub struct DrmDeviceObserver<A: ControlDevice + 'static> {
context: Weak<EGLContext<Gbm<framebuffer::Info>, GbmDevice<A>>>,
device_id: dev_t,
backends: Rc<RefCell<HashMap<crtc::Handle, Weak<DrmBackendInternal<A>>>>>,
old_state: HashMap<crtc::Handle, (crtc::Info, Vec<connector::Handle>)>,
active: Arc<AtomicBool>,
privileged: bool,
logger: ::slog::Logger,
}
#[cfg(feature = "backend_session")]
impl<A: ControlDevice + 'static> AsSessionObserver<DrmDeviceObserver<A>> for DrmDevice<A> {
fn observer(&mut self) -> DrmDeviceObserver<A> {
DrmDeviceObserver {
context: Rc::downgrade(&self.context),
device_id: self.device_id,
backends: self.backends.clone(),
old_state: self.old_state.clone(),
active: self.active.clone(),
privileged: self.privileged,
logger: self.logger.clone(),
}
}
}
#[cfg(feature = "backend_session")]
impl<A: ControlDevice + 'static> SessionObserver for DrmDeviceObserver<A> {
fn pause(&mut self, devnum: Option<(u32, u32)>) {
if let Some((major, minor)) = devnum {
if major as u64 != stat::major(self.device_id) || minor as u64 != stat::minor(self.device_id) {
return;
}
}
if let Some(device) = self.context.upgrade() {
for (handle, &(ref info, ref connectors)) in &self.old_state {
if let Err(err) = crtc::set(
&*device,
*handle,
info.fb(),
connectors,
info.position(),
info.mode(),
) {
error!(self.logger, "Failed to reset crtc ({:?}). Error: {}", handle, err);
}
}
}
self.active.store(false, Ordering::SeqCst);
if self.privileged {
if let Some(device) = self.context.upgrade() {
if let Err(err) = device.drop_master() {
error!(self.logger, "Failed to drop drm master state. Error: {}", err);
}
}
}
}
fn activate(&mut self, devnum: Option<(u32, u32, Option<RawFd>)>) {
if let Some((major, minor, fd)) = devnum {
if major as u64 != stat::major(self.device_id) || minor as u64 != stat::minor(self.device_id) {
return;
} else if let Some(fd) = fd {
info!(self.logger, "Replacing fd");
if let Some(device) = self.context.upgrade() {
nix::unistd::dup2(device.as_raw_fd(), fd)
.expect("Failed to replace file descriptor of drm device");
}
}
}
self.active.store(true, Ordering::SeqCst);
if self.privileged {
if let Some(device) = self.context.upgrade() {
if let Err(err) = device.set_master() {
crit!(self.logger, "Failed to acquire drm master again. Error: {}", err);
}
}
}
let mut crtcs = Vec::new();
for (crtc, backend) in self.backends.borrow().iter() {
if let Some(backend) = backend.upgrade() {
backend.unlock_buffer();
if let Err(err) = backend.page_flip(None) {
error!(
self.logger,
"Failed to activate crtc ({:?}) again. Error: {}", crtc, err
);
}
// reset cursor
{
let &(ref cursor, ref hotspot): &(BufferObject<()>, (u32, u32)) =
unsafe { &*backend.cursor.as_ptr() };
if crtc::set_cursor2(
&*backend.context,
*crtc,
cursor,
((*hotspot).0 as i32, (*hotspot).1 as i32),
).is_err()
{
if let Err(err) = crtc::set_cursor(&*backend.context, *crtc, cursor) {
error!(self.logger, "Failed to reset cursor. Error: {}", err);
}
}
}
} else {
crtcs.push(*crtc);
}
}
for crtc in crtcs {
self.backends.borrow_mut().remove(&crtc);
}
}
} }