Struct surfman::platform::unix::generic::device::Device

pub struct Device {
    pub(crate) native_connection: Arc<NativeConnectionWrapper>,
    pub(crate) adapter: Adapter,
}

A thread-local handle to a device.

Devices contain most of the relevant surface management methods.

Fields

native_connection: Arc<NativeConnectionWrapper>

adapter: Adapter

Implementations

impl Device

pub fn create_context_descriptor( &self, attributes: &ContextAttributes, ) -> Result<ContextDescriptor, Error>

Creates a context descriptor with the given attributes.

Context descriptors are local to this device.

pub fn create_context( &mut self, descriptor: &ContextDescriptor, share_with: Option<&Context>, ) -> Result<Context, Error>

Creates a new OpenGL context.

The context initially has no surface attached. Until a surface is bound to it, rendering commands will fail or have no effect.

pub unsafe fn create_context_from_native_context( &self, native_context: NativeContext, ) -> Result<Context, Error>

Wraps an EGLContext in a native context and returns it.

The context is not retained, as there is no way to do this in the EGL API. Therefore, it is the caller’s responsibility to ensure that the returned Context object remains alive as long as the EGLContext is.

pub fn destroy_context(&self, context: &mut Context) -> Result<(), Error>

Destroys a context.

The context must have been created on this device.

pub fn native_context(&self, context: &Context) -> NativeContext

Given a context, returns its underlying EGL context and attached surfaces.

pub fn context_descriptor(&self, context: &Context) -> ContextDescriptor

Returns the descriptor that this context was created with.

pub fn make_context_current(&self, context: &Context) -> Result<(), Error>

Makes the context the current OpenGL context for this thread.

After calling this function, it is valid to use OpenGL rendering commands.

pub fn make_no_context_current(&self) -> Result<(), Error>

Removes the current OpenGL context from this thread.

After calling this function, OpenGL rendering commands will fail until a new context is made current.

pub(crate) fn temporarily_make_context_current( &self, context: &Context, ) -> Result<CurrentContextGuard, Error>

pub fn context_descriptor_attributes( &self, context_descriptor: &ContextDescriptor, ) -> ContextAttributes

Returns the attributes that the context descriptor was created with.

pub fn get_proc_address(&self, _: &Context, symbol_name: &str) -> *const c_void

Fetches the address of an OpenGL function associated with this context.

OpenGL functions are local to a context. You should not use OpenGL functions on one context with any other context.

This method is typically used with a function like gl::load_with() from the gl crate to load OpenGL function pointers.

pub fn bind_surface_to_context( &self, context: &mut Context, surface: Surface, ) -> Result<(), (Error, Surface)>

Attaches a surface to a context for rendering.

This function takes ownership of the surface. The surface must have been created with this context, or an IncompatibleSurface error is returned.

If this function is called with a surface already bound, a SurfaceAlreadyBound error is returned. To avoid this error, first unbind the existing surface with unbind_surface_from_context.

If an error is returned, the surface is returned alongside it.

pub fn unbind_surface_from_context( &self, context: &mut Context, ) -> Result<Option<Surface>, Error>

Removes and returns any attached surface from this context.

Any pending OpenGL commands targeting this surface will be automatically flushed, so the surface is safe to read from immediately when this function returns.

pub fn context_id(&self, context: &Context) -> ContextID

Returns a unique ID representing a context.

This ID is unique to all currently-allocated contexts. If you destroy a context and create a new one, the new context might have the same ID as the destroyed one.

pub fn context_surface_info( &self, context: &Context, ) -> Result<Option<SurfaceInfo>, Error>

Returns various information about the surface attached to a context.

This includes, most notably, the OpenGL framebuffer object needed to render to the surface.

impl Device

pub(crate) fn new( connection: &Connection, adapter: &Adapter, ) -> Result<Device, Error>

pub fn native_device(&self) -> NativeDevice

Returns the native device corresponding to this device.

This method is essentially an alias for the adapter() method on Mesa, since there is no explicit concept of a device on this backend.

pub fn connection(&self) -> Connection

Returns the display server connection that this device was created with.

pub fn adapter(&self) -> Adapter

Returns the adapter that this device was created with.

pub fn gl_api(&self) -> GLApi

Returns the OpenGL API flavor that this device supports (OpenGL or OpenGL ES).

impl Device

pub fn create_surface( &mut self, context: &Context, _: SurfaceAccess, surface_type: SurfaceType<NativeWidget>, ) -> Result<Surface, Error>

Creates either a generic or a widget surface, depending on the supplied surface type.

Only the given context may ever render to the surface, but generic surfaces can be wrapped up in a SurfaceTexture for reading by other contexts.

fn create_generic_surface( &mut self, context: &Context, size: &Size2D<i32>, ) -> Result<Surface, Error>

pub fn create_surface_texture( &self, context: &mut Context, surface: Surface, ) -> Result<SurfaceTexture, (Error, Surface)>

Creates a surface texture from an existing generic surface for use with the given context.

The surface texture is local to the supplied context and takes ownership of the surface. Destroying the surface texture allows you to retrieve the surface again.

The supplied context does not have to be the same context that the surface is associated with. This allows you to render to a surface in one context and sample from that surface in another context.

Calling this method on a widget surface returns a WidgetAttached error.

pub fn destroy_surface( &self, context: &mut Context, surface: &mut Surface, ) -> Result<(), Error>

Destroys a surface.

The supplied context must be the context the surface is associated with, or this returns an IncompatibleSurface error.

You must explicitly call this method to dispose of a surface. Otherwise, a panic occurs in the drop method.

pub fn destroy_surface_texture( &self, context: &mut Context, surface_texture: SurfaceTexture, ) -> Result<Surface, (Error, SurfaceTexture)>

Destroys a surface texture and returns the underlying surface.

The supplied context must be the same context the surface texture was created with, or an IncompatibleSurfaceTexture error is returned.

All surface textures must be explicitly destroyed with this function, or a panic will occur.

pub fn present_surface( &self, context: &Context, surface: &mut Surface, ) -> Result<(), Error>

Displays the contents of a widget surface on screen.

Widget surfaces are internally double-buffered, so changes to them don’t show up in their associated widgets until this method is called.

The supplied context must match the context the surface was created with, or an IncompatibleSurface error is returned.

pub fn resize_surface( &self, _context: &Context, surface: &mut Surface, size: Size2D<i32>, ) -> Result<(), Error>

Resizes a widget surface.

pub fn lock_surface_data<'s>( &self, _: &'s mut Surface, ) -> Result<SurfaceDataGuard<'s>, Error>

Returns a pointer to the underlying surface data for reading or writing by the CPU.

pub fn surface_gl_texture_target(&self) -> c_uint

Returns the OpenGL texture target needed to read from this surface texture.

This will be GL_TEXTURE_2D or GL_TEXTURE_RECTANGLE, depending on platform.

pub fn surface_info(&self, surface: &Surface) -> SurfaceInfo

Returns various information about the surface, including the framebuffer object needed to render to this surface.

Before rendering to a surface attached to a context, you must call glBindFramebuffer() on the framebuffer object returned by this function. This framebuffer object may or not be 0, the default framebuffer, depending on platform.

pub fn surface_texture_object(&self, surface_texture: &SurfaceTexture) -> c_uint

Returns the OpenGL texture object containing the contents of this surface.

It is only legal to read from, not write to, this texture object.

Trait Implementations

impl Device for Device

fn native_device( &self, ) -> <Self::Connection as ConnectionInterface>::NativeDevice

Returns the native device associated with this device.

type Connection = Connection

The connection type associated with this device.

type Context = Context

The context type associated with this device.

type ContextDescriptor = ContextDescriptor

The context descriptor type associated with this device.

type NativeContext = NativeContext

The native context type associated with this device.

type Surface = Surface

The surface type associated with this device.

type SurfaceTexture = SurfaceTexture

The surface texture type associated with this device.

fn connection(&self) -> Connection

Returns the display server connection that this device was created with.

fn adapter(&self) -> Adapter

Returns the adapter that this device was created with.

fn gl_api(&self) -> GLApi

Returns the OpenGL API flavor that this device supports (OpenGL or OpenGL ES).

fn create_context_descriptor( &self, attributes: &ContextAttributes, ) -> Result<Self::ContextDescriptor, Error>

Creates a context descriptor with the given attributes.

fn create_context( &mut self, descriptor: &Self::ContextDescriptor, share_with: Option<&Self::Context>, ) -> Result<Self::Context, Error>

Creates a new OpenGL context.

unsafe fn create_context_from_native_context( &self, native_context: Self::NativeContext, ) -> Result<Self::Context, Error>

Wraps a native context object in an OpenGL context.

fn destroy_context(&self, context: &mut Self::Context) -> Result<(), Error>

Destroys a context.

fn context_descriptor(&self, context: &Self::Context) -> Self::ContextDescriptor

Returns the descriptor that this context was created with.

fn make_context_current(&self, context: &Self::Context) -> Result<(), Error>

Makes the context the current OpenGL context for this thread.

fn make_no_context_current(&self) -> Result<(), Error>

Removes the current OpenGL context from this thread.

fn context_descriptor_attributes( &self, context_descriptor: &Self::ContextDescriptor, ) -> ContextAttributes

Returns the attributes that the context descriptor was created with.

fn get_proc_address( &self, context: &Self::Context, symbol_name: &str, ) -> *const c_void

Fetches the address of an OpenGL function associated with this context.

fn bind_surface_to_context( &self, context: &mut Self::Context, surface: Self::Surface, ) -> Result<(), (Error, Self::Surface)>

Attaches a surface to a context for rendering.

fn unbind_surface_from_context( &self, context: &mut Self::Context, ) -> Result<Option<Self::Surface>, Error>

Removes and returns any attached surface from this context.

fn context_id(&self, context: &Self::Context) -> ContextID

Returns a unique ID representing a context.

fn context_surface_info( &self, context: &Self::Context, ) -> Result<Option<SurfaceInfo>, Error>

Returns various information about the surface attached to a context.

fn native_context(&self, context: &Self::Context) -> Self::NativeContext

Returns the native context associated with the given context.

fn create_surface( &mut self, context: &Self::Context, surface_access: SurfaceAccess, surface_type: SurfaceType<NativeWidget>, ) -> Result<Self::Surface, Error>

Creates either a generic or a widget surface, depending on the supplied surface type.

fn create_surface_texture( &self, context: &mut Self::Context, surface: Self::Surface, ) -> Result<Self::SurfaceTexture, (Error, Self::Surface)>

Creates a surface texture from an existing generic surface for use with the given context.

fn destroy_surface( &self, context: &mut Self::Context, surface: &mut Self::Surface, ) -> Result<(), Error>

Destroys a surface.

fn destroy_surface_texture( &self, context: &mut Self::Context, surface_texture: Self::SurfaceTexture, ) -> Result<Self::Surface, (Error, Self::SurfaceTexture)>

Destroys a surface texture and returns the underlying surface.

fn surface_gl_texture_target(&self) -> c_uint

Returns the OpenGL texture target needed to read from this surface texture.

fn present_surface( &self, context: &Self::Context, surface: &mut Self::Surface, ) -> Result<(), Error>

Displays the contents of a widget surface on screen.

fn resize_surface( &self, context: &Context, surface: &mut Surface, size: Size2D<i32>, ) -> Result<(), Error>

Resizes a widget surface.

fn surface_info(&self, surface: &Self::Surface) -> SurfaceInfo

Returns various information about the surface, including the framebuffer object needed to render to this surface.

fn surface_texture_object( &self, surface_texture: &Self::SurfaceTexture, ) -> c_uint

Returns the OpenGL texture object containing the contents of this surface.