RGLSwapchainWL Class Reference

OpenGL backend implementation of RWLSwapchain. More...

#include <RGLSwapchainWL.h>

Inheritance diagram for RGLSwapchainWL:

Public Member Functions
	~RGLSwapchainWL () noexcept
	Destroys the EGL surface and the wl_egl_window.
std::optional< const RSwapchainImage >	acquire () noexcept override
	Acquires the swapchain image to render the next frame into.
bool	present (const RSwapchainImage &image, SkRegion *damage=nullptr) noexcept override
	Presents a previously acquired image to the Wayland surface.
bool	resize (SkISize size) noexcept override
	Resizes the swapchain (and the underlying wl_egl_window).
Public Member Functions inherited from RWLSwapchain
wl_surface *	surface () const noexcept
	Returns the Wayland surface this swapchain presents to.
Public Member Functions inherited from RSwapchain
	RSwapchain (SkISize size) noexcept
	Construct a swapchain with the given image size.
SkISize	size () const noexcept
	The size of swapchain images in pixels.
Public Member Functions inherited from RObject
	RObject ()=default
	Constructs a default RObject.

Additional Inherited Members
Static Public Member Functions inherited from RWLSwapchain
static std::shared_ptr< RWLSwapchain >	Make (wl_surface *surface, SkISize size) noexcept
	Creates a Wayland swapchain for the given surface.

Detailed Description

OpenGL backend implementation of RWLSwapchain.

Presents to a Wayland surface via EGL. It creates a wl_egl_window and an EGLSurface for the given wl_surface, wraps that surface as an RGLImage, and drives presentation with eglSwapBuffers (using eglSwapBuffersWithDamageKHR when damage and the extension are available). Created via RWLSwapchain::Make().

Constructor & Destructor Documentation

~RGLSwapchainWL()

~RGLSwapchainWL ( )

noexcept

Destroys the EGL surface and the wl_egl_window.

Member Function Documentation

acquire()

std::optional< const RSwapchainImage > acquire ( )

overridevirtualnoexcept

Acquires the swapchain image to render the next frame into.

Returns

The swapchain image (with its buffer age), or std::nullopt if an image is already acquired and not yet presented.

Implements RSwapchain.

present()

bool present ( const RSwapchainImage &  image, SkRegion *  damage = nullptr  )

overridevirtualnoexcept

Presents a previously acquired image to the Wayland surface.

Parameters

image	The image returned by acquire().
damage	Optional damage region (in image coordinates); enables damage-aware swapping when supported, otherwise the whole surface is swapped.

Returns

true on success, false if the image does not match or was not acquired.

Implements RSwapchain.

resize()

bool resize ( SkISize  size )

overridevirtualnoexcept

Resizes the swapchain (and the underlying wl_egl_window).

Parameters

size	The new size in pixels. Must be non-empty.

Returns

true on success (including when the size is unchanged), false if the size is invalid.

Implements RSwapchain.