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/*! Presentation.
## Lifecycle
Whenever a submission detects the use of any surface texture, it adds it to the device
tracker for the duration of the submission (temporarily, while recording).
It's added with `UNINITIALIZED` state and transitioned into `empty()` state.
When this texture is presented, we remove it from the device tracker as well as
extract it from the hub.
!*/
use std::{mem::ManuallyDrop, sync::Arc};
#[cfg(feature = "trace")]
use crate::device::trace::Action;
use crate::{
conv,
device::{Device, DeviceError, MissingDownlevelFlags, WaitIdleError},
global::Global,
hal_label, id,
resource::{self, Trackable},
};
use thiserror::Error;
use wgt::SurfaceStatus as Status;
const FRAME_TIMEOUT_MS: u32 = 1000;
#[derive(Debug)]
pub(crate) struct Presentation {
pub(crate) device: Arc<Device>,
pub(crate) config: wgt::SurfaceConfiguration<Vec<wgt::TextureFormat>>,
pub(crate) acquired_texture: Option<id::TextureId>,
}
#[derive(Clone, Debug, Error)]
#[non_exhaustive]
pub enum SurfaceError {
#[error("Surface is invalid")]
Invalid,
#[error("Surface is not configured for presentation")]
NotConfigured,
#[error(transparent)]
Device(#[from] DeviceError),
#[error("Surface image is already acquired")]
AlreadyAcquired,
#[error("Acquired frame is still referenced")]
StillReferenced,
}
#[derive(Clone, Debug, Error)]
#[non_exhaustive]
pub enum ConfigureSurfaceError {
#[error(transparent)]
Device(#[from] DeviceError),
#[error("Invalid surface")]
InvalidSurface,
#[error("The view format {0:?} is not compatible with texture format {1:?}, only changing srgb-ness is allowed.")]
InvalidViewFormat(wgt::TextureFormat, wgt::TextureFormat),
#[error(transparent)]
MissingDownlevelFlags(#[from] MissingDownlevelFlags),
#[error("`SurfaceOutput` must be dropped before a new `Surface` is made")]
PreviousOutputExists,
#[error("Both `Surface` width and height must be non-zero. Wait to recreate the `Surface` until the window has non-zero area.")]
ZeroArea,
#[error("`Surface` width and height must be within the maximum supported texture size. Requested was ({width}, {height}), maximum extent for either dimension is {max_texture_dimension_2d}.")]
TooLarge {
width: u32,
height: u32,
max_texture_dimension_2d: u32,
},
#[error("Surface does not support the adapter's queue family")]
UnsupportedQueueFamily,
#[error("Requested format {requested:?} is not in list of supported formats: {available:?}")]
UnsupportedFormat {
requested: wgt::TextureFormat,
available: Vec<wgt::TextureFormat>,
},
#[error("Requested present mode {requested:?} is not in the list of supported present modes: {available:?}")]
UnsupportedPresentMode {
requested: wgt::PresentMode,
available: Vec<wgt::PresentMode>,
},
#[error("Requested alpha mode {requested:?} is not in the list of supported alpha modes: {available:?}")]
UnsupportedAlphaMode {
requested: wgt::CompositeAlphaMode,
available: Vec<wgt::CompositeAlphaMode>,
},
#[error("Requested usage {requested:?} is not in the list of supported usages: {available:?}")]
UnsupportedUsage {
requested: hal::TextureUses,
available: hal::TextureUses,
},
#[error("Gpu got stuck :(")]
StuckGpu,
}
impl From<WaitIdleError> for ConfigureSurfaceError {
fn from(e: WaitIdleError) -> Self {
match e {
WaitIdleError::Device(d) => ConfigureSurfaceError::Device(d),
WaitIdleError::WrongSubmissionIndex(..) => unreachable!(),
WaitIdleError::StuckGpu => ConfigureSurfaceError::StuckGpu,
}
}
}
#[repr(C)]
#[derive(Debug)]
pub struct SurfaceOutput {
pub status: Status,
pub texture_id: Option<id::TextureId>,
}
impl Global {
pub fn surface_get_current_texture(
&self,
surface_id: id::SurfaceId,
texture_id_in: Option<id::TextureId>,
) -> Result<SurfaceOutput, SurfaceError> {
profiling::scope!("SwapChain::get_next_texture");
let hub = &self.hub;
let surface = self.surfaces.get(surface_id);
let (device, config) = if let Some(ref present) = *surface.presentation.lock() {
present.device.check_is_valid()?;
(present.device.clone(), present.config.clone())
} else {
return Err(SurfaceError::NotConfigured);
};
let fid = hub.textures.prepare(texture_id_in);
#[cfg(feature = "trace")]
if let Some(ref mut trace) = *device.trace.lock() {
trace.add(Action::GetSurfaceTexture {
id: fid.id(),
parent_id: surface_id,
});
}
let fence = device.fence.read();
let suf = surface.raw(device.backend()).unwrap();
let (texture_id, status) = match unsafe {
suf.acquire_texture(
Some(std::time::Duration::from_millis(FRAME_TIMEOUT_MS as u64)),
fence.as_ref(),
)
} {
Ok(Some(ast)) => {
drop(fence);
let texture_desc = wgt::TextureDescriptor {
label: Some(std::borrow::Cow::Borrowed("<Surface Texture>")),
size: wgt::Extent3d {
width: config.width,
height: config.height,
depth_or_array_layers: 1,
},
sample_count: 1,
mip_level_count: 1,
format: config.format,
dimension: wgt::TextureDimension::D2,
usage: config.usage,
view_formats: config.view_formats,
};
let hal_usage = conv::map_texture_usage(config.usage, config.format.into());
let format_features = wgt::TextureFormatFeatures {
allowed_usages: wgt::TextureUsages::RENDER_ATTACHMENT,
flags: wgt::TextureFormatFeatureFlags::MULTISAMPLE_X4
| wgt::TextureFormatFeatureFlags::MULTISAMPLE_RESOLVE,
};
let clear_view_desc = hal::TextureViewDescriptor {
label: hal_label(
Some("(wgpu internal) clear surface texture view"),
device.instance_flags,
),
format: config.format,
dimension: wgt::TextureViewDimension::D2,
usage: hal::TextureUses::COLOR_TARGET,
range: wgt::ImageSubresourceRange::default(),
};
let clear_view = unsafe {
device
.raw()
.create_texture_view(ast.texture.as_ref().borrow(), &clear_view_desc)
}
.map_err(|e| device.handle_hal_error(e))?;
let mut presentation = surface.presentation.lock();
let present = presentation.as_mut().unwrap();
let texture = resource::Texture::new(
&device,
resource::TextureInner::Surface {
raw: ast.texture,
parent_id: surface_id,
},
hal_usage,
&texture_desc,
format_features,
resource::TextureClearMode::Surface {
clear_view: ManuallyDrop::new(clear_view),
},
true,
);
let texture = Arc::new(texture);
device
.trackers
.lock()
.textures
.insert_single(&texture, hal::TextureUses::UNINITIALIZED);
let id = fid.assign(resource::Fallible::Valid(texture));
if present.acquired_texture.is_some() {
return Err(SurfaceError::AlreadyAcquired);
}
present.acquired_texture = Some(id);
let status = if ast.suboptimal {
Status::Suboptimal
} else {
Status::Good
};
(Some(id), status)
}
Ok(None) => (None, Status::Timeout),
Err(err) => (
None,
match err {
hal::SurfaceError::Lost => Status::Lost,
hal::SurfaceError::Device(err) => {
return Err(device.handle_hal_error(err).into());
}
hal::SurfaceError::Outdated => Status::Outdated,
hal::SurfaceError::Other(msg) => {
log::error!("acquire error: {}", msg);
Status::Lost
}
},
),
};
Ok(SurfaceOutput { status, texture_id })
}
pub fn surface_present(&self, surface_id: id::SurfaceId) -> Result<Status, SurfaceError> {
profiling::scope!("SwapChain::present");
let hub = &self.hub;
let surface = self.surfaces.get(surface_id);
let mut presentation = surface.presentation.lock();
let present = match presentation.as_mut() {
Some(present) => present,
None => return Err(SurfaceError::NotConfigured),
};
let device = &present.device;
#[cfg(feature = "trace")]
if let Some(ref mut trace) = *device.trace.lock() {
trace.add(Action::Present(surface_id));
}
device.check_is_valid()?;
let queue = device.get_queue().unwrap();
let result = {
let texture_id = present
.acquired_texture
.take()
.ok_or(SurfaceError::AlreadyAcquired)?;
// The texture ID got added to the device tracker by `submit()`,
// and now we are moving it away.
let texture = hub.textures.remove(texture_id).get();
if let Ok(texture) = texture {
device
.trackers
.lock()
.textures
.remove(texture.tracker_index());
let suf = surface.raw(device.backend()).unwrap();
match texture
.inner
.snatch(&mut device.snatchable_lock.write())
.unwrap()
{
resource::TextureInner::Surface { raw, parent_id } => {
if surface_id != parent_id {
log::error!("Presented frame is from a different surface");
Err(hal::SurfaceError::Lost)
} else {
unsafe { queue.raw().present(suf, raw) }
}
}
_ => unreachable!(),
}
} else {
Err(hal::SurfaceError::Outdated) //TODO?
}
};
match result {
Ok(()) => Ok(Status::Good),
Err(err) => match err {
hal::SurfaceError::Lost => Ok(Status::Lost),
hal::SurfaceError::Device(err) => {
Err(SurfaceError::from(device.handle_hal_error(err)))
}
hal::SurfaceError::Outdated => Ok(Status::Outdated),
hal::SurfaceError::Other(msg) => {
log::error!("acquire error: {}", msg);
Err(SurfaceError::Invalid)
}
},
}
}
pub fn surface_texture_discard(&self, surface_id: id::SurfaceId) -> Result<(), SurfaceError> {
profiling::scope!("SwapChain::discard");
let hub = &self.hub;
let surface = self.surfaces.get(surface_id);
let mut presentation = surface.presentation.lock();
let present = match presentation.as_mut() {
Some(present) => present,
None => return Err(SurfaceError::NotConfigured),
};
let device = &present.device;
#[cfg(feature = "trace")]
if let Some(ref mut trace) = *device.trace.lock() {
trace.add(Action::DiscardSurfaceTexture(surface_id));
}
device.check_is_valid()?;
{
let texture_id = present
.acquired_texture
.take()
.ok_or(SurfaceError::AlreadyAcquired)?;
// The texture ID got added to the device tracker by `submit()`,
// and now we are moving it away.
let texture = hub.textures.remove(texture_id).get();
if let Ok(texture) = texture {
device
.trackers
.lock()
.textures
.remove(texture.tracker_index());
let suf = surface.raw(device.backend());
match texture
.inner
.snatch(&mut device.snatchable_lock.write())
.unwrap()
{
resource::TextureInner::Surface { raw, parent_id } => {
if surface_id == parent_id {
unsafe { suf.unwrap().discard_texture(raw) };
} else {
log::warn!("Surface texture is outdated");
}
}
_ => unreachable!(),
}
}
}
Ok(())
}
}