Struct crispy::raw::Backend

pub struct Backend {
    ctx: ContextRef,
    size: Rc<RefCell<(u32, u32)>>,
}

A simple backend for rendering into GBM (headless) buffers used via an EGL context.

Contrary to a typical backend (?), this one does not assume a default buffer. It’s meant to be used to draw to random surfaces. (TODO: is there a reason to attach it to every GBM surface?).

Not very safe. Do your own swapbuffers. Prints debug info.

Fields

ctx: ContextRef

size: Rc<RefCell<(u32, u32)>>

Implementations

impl Backend

fn new(ctx: ContextRef, size: (u32, u32)) -> Self

pub unsafe fn get_proc_address(name: &str) -> *const c_void

Trait Implementations

impl Backend for Backend

fn swap_buffers(&self) -> Result<(), SwapBuffersError>

Swaps buffers at the end of a frame.

unsafe fn get_proc_address(&self, name: &str) -> *const c_void

Returns the address of an OpenGL function.

fn get_framebuffer_dimensions(&self) -> (u32, u32)

Returns the dimensions of the window, or screen, etc.

fn is_current(&self) -> bool

Returns true if the OpenGL context is the current one in the thread.

unsafe fn make_current(&self)

Makes the OpenGL context the current context in the current thread.

fn resize(&self, new_size: (u32, u32))

Resizes the underlying surface, should be called when the window’s size has changed for example.