Struct GlPlatformSurface 

pub struct GlPlatformSurface { /* private fields */ }

The OpenGL render surface of a top-level.

The surface is shared with the thread that renders, like the Metal surface (metal.rs): what it holds of the native side is the native top-level, which only the UI thread may use, so the render target is created on the UI thread, as in the original, and the surface is not ready on any other thread.

Trait Implementations

impl IGlPlatformSurface for GlPlatformSurface

fn create_gl_render_target( &self, context: &Rc<dyn IGlContext>, ) -> Rc<dyn IGlPlatformSurfaceRenderTarget>

Panics

Panics when called off the UI thread or when the top-level is disposed (the render target is not ready), when context is not a context of this backend and when the native top-level cannot create the render target.

impl IPlatformRenderSurface for GlPlatformSurface

fn is_ready(&self) -> bool

Deviation (DEVIATIONS.md, Native backend), as for the Metal surface: the original throws RenderTargetNotReadyException from CreateGlRenderTarget off the UI thread and the composition target catches it; here the surface answers that it is not ready there.

fn try_get_surface_kind(&self, kind: TypeId) -> Option<Rc<dyn Any>>

The surface viewed as a surface kind defined outside this crate: for TypeId::of::<dyn IFoo>() the result holds an Rc<dyn IFoo>.

fn as_any(&self) -> &dyn Any

Lets the backend recover the concrete surface type.

fn as_framebuffer_surface(&self) -> Option<&dyn IFramebufferPlatformSurface>

The surface as a framebuffer surface, if it is one.

fn text_rendering_parameters(&self) -> Option<PlatformTextRenderingParameters>

The text rendering settings of the platform for this surface, when the platform knows them: the render backend asks for them every frame (they follow the settings of the system and the display the surface is on). A backend asks every surface of a top-level and takes the first answer; None from all of them gives the defaults of the backend (docs/porting/text-rendering.md).