Struct plotters_gtk4::SnapshotBackend

pub struct SnapshotBackend<'a> { /* private fields */ }

Backend that draws to a [gtk::Snapshot].

Implementations

impl<'a> SnapshotBackend<'a>

pub fn new(snapshot: &'a Snapshot, (w, h): (u32, u32)) -> Self

Creates a new drawing backend backed with [gtk::Snapshot] with the given width and height.

Trait Implementations

impl<'a> Debug for SnapshotBackend<'a>

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

Formats the value using the given formatter.

impl<'a> DrawingBackend for SnapshotBackend<'a>

type ErrorType = Infallible

The error type reported by the backend

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

Get the dimension of the drawing backend in pixels

fn ensure_prepared(&mut self) -> Result<(), DrawingErrorKind<Self::ErrorType>>

Ensure the backend is ready to draw

fn present(&mut self) -> Result<(), DrawingErrorKind<Self::ErrorType>>

Finalize the drawing step and present all the changes. This is used as the real-time rendering support. The backend may implement in the following way, when ensure_prepared is called it checks if it needs a fresh buffer and present is called rendering all the pending changes on the screen.

fn draw_pixel( &mut self, point: BackendCoord, color: BackendColor, ) -> Result<(), DrawingErrorKind<Self::ErrorType>>

Draw a pixel on the drawing backend

fn draw_line<S: BackendStyle>( &mut self, from: BackendCoord, to: BackendCoord, style: &S, ) -> Result<(), DrawingErrorKind<Self::ErrorType>>

Draw a line on the drawing backend

fn draw_rect<S: BackendStyle>( &mut self, upper_left: BackendCoord, bottom_right: BackendCoord, style: &S, fill: bool, ) -> Result<(), DrawingErrorKind<Self::ErrorType>>

Draw a rectangle on the drawing backend

fn draw_path<S: BackendStyle, I: IntoIterator<Item = BackendCoord>>( &mut self, raw_path: I, style: &S, ) -> Result<(), DrawingErrorKind<Self::ErrorType>>

Draw a path on the drawing backend

fn fill_polygon<S: BackendStyle, I: IntoIterator<Item = BackendCoord>>( &mut self, vert: I, style: &S, ) -> Result<(), DrawingErrorKind<Self::ErrorType>>

fn draw_circle<S: BackendStyle>( &mut self, center: BackendCoord, radius: u32, style: &S, fill: bool, ) -> Result<(), DrawingErrorKind<Self::ErrorType>>

Draw a circle on the drawing backend

fn estimate_text_size<TStyle: BackendTextStyle>( &self, text: &str, style: &TStyle, ) -> Result<(u32, u32), DrawingErrorKind<Self::ErrorType>>

Estimate the size of the horizontal text if rendered on this backend. This is important because some of the backend may not have font ability. Thus this allows those backend reports proper value rather than ask the font rasterizer for that.

fn draw_text<TStyle: BackendTextStyle>( &mut self, text: &str, style: &TStyle, pos: BackendCoord, ) -> Result<(), DrawingErrorKind<Self::ErrorType>>

Draw a text on the drawing backend

fn blit_bitmap( &mut self, pos: (i32, i32), _: (u32, u32), src: &[u8], ) -> Result<(), DrawingErrorKind<Self::ErrorType>>

Blit a bitmap on to the backend.