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// surfman/src/platform/unix/default.rs
//
//! The default backend for Unix, which dynamically switches between Wayland, X11 and surfaceless.
/// Wayland or X11 display server connections.
pub mod connection {
use crate::platform::generic::multi::connection::Connection as MultiConnection;
use crate::platform::generic::multi::connection::NativeConnection as MultiNativeConnection;
use crate::platform::generic::multi::device::Device as MultiDevice;
use crate::platform::unix::generic::device::Device as SWDevice;
use crate::platform::unix::wayland::device::Device as WaylandDevice;
use crate::platform::unix::x11::device::Device as X11Device;
type HWDevice = MultiDevice<WaylandDevice, X11Device>;
/// Either a Wayland or an X11 display server connection.
pub type Connection = MultiConnection<HWDevice, SWDevice>;
/// Either a Wayland or an X11 native connection
pub type NativeConnection = MultiNativeConnection<HWDevice, SWDevice>;
}
/// OpenGL rendering contexts.
pub mod context {
use crate::platform::generic::multi::context::Context as MultiContext;
use crate::platform::generic::multi::context::ContextDescriptor as MultiContextDescriptor;
use crate::platform::generic::multi::context::NativeContext as MultiNativeContext;
use crate::platform::generic::multi::device::Device as MultiDevice;
use crate::platform::unix::generic::device::Device as SWDevice;
use crate::platform::unix::wayland::device::Device as WaylandDevice;
use crate::platform::unix::x11::device::Device as X11Device;
type HWDevice = MultiDevice<WaylandDevice, X11Device>;
/// Represents an OpenGL rendering context.
///
/// A context allows you to issue rendering commands to a surface. When initially created, a
/// context has no attached surface, so rendering commands will fail or be ignored. Typically,
/// you attach a surface to the context before rendering.
///
/// Contexts take ownership of the surfaces attached to them. In order to mutate a surface in
/// any way other than rendering to it (e.g. presenting it to a window, which causes a buffer
/// swap), it must first be detached from its context. Each surface is associated with a single
/// context upon creation and may not be rendered to from any other context. However, you can
/// wrap a surface in a surface texture, which allows the surface to be read from another
/// context.
///
/// OpenGL objects may not be shared across contexts directly, but surface textures effectively
/// allow for sharing of texture data. Contexts are local to a single thread and device.
///
/// A context must be explicitly destroyed with `destroy_context()`, or a panic will occur.
pub type Context = MultiContext<HWDevice, SWDevice>;
/// Information needed to create a context. Some APIs call this a "config" or a "pixel format".
///
/// These are local to a device.
pub type ContextDescriptor = MultiContextDescriptor<HWDevice, SWDevice>;
/// Either a Wayland or an X11 native context
pub type NativeContext = MultiNativeContext<HWDevice, SWDevice>;
}
/// Thread-local handles to devices.
pub mod device {
use crate::platform::generic::multi::device::Adapter as MultiAdapter;
use crate::platform::generic::multi::device::NativeDevice as MultiNativeDevice;
use crate::platform::unix::generic::device::Device as SWDevice;
use crate::platform::unix::wayland::device::Device as WaylandDevice;
use crate::platform::unix::x11::device::Device as X11Device;
use crate::platform::generic::multi::device::Device as MultiDevice;
type HWDevice = MultiDevice<WaylandDevice, X11Device>;
/// Represents a hardware display adapter that can be used for rendering (including the CPU).
///
/// Adapters can be sent between threads. To render with an adapter, open a thread-local
/// `Device`.
pub type Adapter = MultiAdapter<HWDevice, SWDevice>;
/// A thread-local handle to a device.
///
/// Devices contain most of the relevant surface management methods.
pub type Device = MultiDevice<HWDevice, SWDevice>;
/// Either a Wayland or an X11 native device
pub type NativeDevice = MultiNativeDevice<HWDevice, SWDevice>;
}
/// Hardware buffers of pixels.
pub mod surface {
use crate::platform::generic::multi::device::Device as MultiDevice;
use crate::platform::generic::multi::surface::NativeWidget as MultiNativeWidget;
use crate::platform::generic::multi::surface::Surface as MultiSurface;
use crate::platform::generic::multi::surface::SurfaceTexture as MultiSurfaceTexture;
use crate::platform::unix::generic::device::Device as SWDevice;
use crate::platform::unix::wayland::device::Device as WaylandDevice;
use crate::platform::unix::x11::device::Device as X11Device;
type HWDevice = MultiDevice<WaylandDevice, X11Device>;
/// A wrapper for a Wayland surface or an X11 `Window`, as appropriate.
pub type NativeWidget = MultiNativeWidget<HWDevice, SWDevice>;
/// Represents a hardware buffer of pixels that can be rendered to via the CPU or GPU and
/// either displayed in a native widget or bound to a texture for reading.
///
/// Surfaces come in two varieties: generic and widget surfaces. Generic surfaces can be bound
/// to a texture but cannot be displayed in a widget (without using other APIs such as Core
/// Animation, DirectComposition, or XPRESENT). Widget surfaces are the opposite: they can be
/// displayed in a widget but not bound to a texture.
///
/// Surfaces are specific to a given context and cannot be rendered to from any context other
/// than the one they were created with. However, they can be *read* from any context on any
/// thread (as long as that context shares the same adapter and connection), by wrapping them
/// in a `SurfaceTexture`.
///
/// Depending on the platform, each surface may be internally double-buffered.
///
/// Surfaces must be destroyed with the `destroy_surface()` method, or a panic will occur.
pub type Surface = MultiSurface<HWDevice, SWDevice>;
/// Represents an OpenGL texture that wraps a surface.
///
/// Reading from the associated OpenGL texture reads from the surface. It is undefined behavior
/// to write to such a texture (e.g. by binding it to a framebuffer and rendering to that
/// framebuffer).
///
/// Surface textures are local to a context, but that context does not have to be the same
/// context as that associated with the underlying surface. The texture must be destroyed with
/// the `destroy_surface_texture()` method, or a panic will occur.
pub type SurfaceTexture = MultiSurfaceTexture<HWDevice, SWDevice>;
// FIXME(pcwalton): Revamp how this works.
#[doc(hidden)]
pub struct SurfaceDataGuard {}
}