Struct zng_app::view_process::ViewRenderer

pub struct ViewRenderer(/* private fields */);

Weak handle to a window or view.

This is only a weak reference, every method returns ViewProcessOffline if the window is closed or view is disposed.

Implementations

impl ViewRenderer

pub fn generation(&self) -> Result<ViewProcessGen, ViewProcessOffline>

Returns the view-process generation on which the renderer was created.

pub fn use_image( &self, image: &ViewImage ) -> Result<ImageTextureId, ViewProcessOffline>

Use an image resource in the window renderer.

Returns the image texture ID.

pub fn update_image_use( &mut self, tex_id: ImageTextureId, image: &ViewImage ) -> Result<(), ViewProcessOffline>

Replace the image resource in the window renderer.

pub fn delete_image_use( &mut self, tex_id: ImageTextureId ) -> Result<(), ViewProcessOffline>

Delete the image resource in the window renderer.

pub fn add_font_face( &self, bytes: Vec<u8>, index: u32 ) -> Result<FontFaceId, ViewProcessOffline>

Add a raw font resource to the window renderer.

Returns the new font face ID, unique for this renderer.

pub fn delete_font_face( &self, font_face_id: FontFaceId ) -> Result<(), ViewProcessOffline>

Delete the font resource in the window renderer.

pub fn add_font( &self, font_face_id: FontFaceId, glyph_size: Px, options: FontOptions, variations: Vec<(FontVariationName, f32)> ) -> Result<FontId, ViewProcessOffline>

Add a sized font to the window renderer.

Returns the new font ID, unique for this renderer.

pub fn delete_font(&self, font_id: FontId) -> Result<(), ViewProcessOffline>

Delete the sized font.

pub fn frame_image( &self, mask: Option<ImageMaskMode> ) -> Result<ViewImage, ViewProcessOffline>

Create a new image resource from the current rendered frame.

pub fn frame_image_rect( &self, rect: PxRect, mask: Option<ImageMaskMode> ) -> Result<ViewImage, ViewProcessOffline>

Create a new image resource from a selection of the current rendered frame.

pub fn render(&self, frame: FrameRequest) -> Result<(), ViewProcessOffline>

Render a new frame.

pub fn render_update( &self, frame: FrameUpdateRequest ) -> Result<(), ViewProcessOffline>

Update the current frame and re-render it.

pub fn render_extension_raw( &self, extension_id: ApiExtensionId, request: ApiExtensionPayload ) -> Result<ApiExtensionPayload, ViewProcessOffline>

Call a render extension with custom encoded payload.

pub fn render_extension<I, O>( &self, extension_id: ApiExtensionId, request: &I ) -> Result<Result<O, ApiExtensionRecvError>, ViewProcessOffline>

where I: Serialize, O: DeserializeOwned,

Call a render extension with serialized payload.

Trait Implementations

impl Clone for ViewRenderer

fn clone(&self) -> ViewRenderer

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ViewRenderer

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for ViewRenderer

fn eq(&self, other: &Self) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for ViewRenderer