Struct DrawContext 

pub struct DrawContext { /* private fields */ }

A batched immediate drawing command recorder.

Application code normally receives this from CustomDrawable or Bitmap::canvas, rather than constructing it directly.

Implementations

impl DrawContext

pub fn flush(&self)

Sends the current ordered command batch to the active host canvas. Normal CustomDrawable callbacks are flushed automatically.

pub fn save(&self)

Saves transform and clip state.

pub fn restore(&self)

Restores the most recently saved transform and clip state.

pub fn translate(&self, x: f32, y: f32)

Translates subsequent commands.

pub fn scale(&self, sx: f32, sy: f32)

Scales subsequent commands.

pub fn rotate(&self, degrees: f32)

Rotates subsequent commands in degrees.

pub fn clip_rect(&self, x: f32, y: f32, w: f32, h: f32)

Intersects the current clip with an axis-aligned rectangle.

pub fn clip_round_rect( &self, x: f32, y: f32, w: f32, h: f32, tl: f32, tr: f32, br: f32, bl: f32, )

Intersects the current clip with a per-corner rounded rectangle.

pub fn draw_rect(&self, x: f32, y: f32, w: f32, h: f32, paint: Paint)

Draws a rectangle.

pub fn draw_circle(&self, cx: f32, cy: f32, radius: f32, paint: Paint)

Draws a circle.

pub fn draw_line( &self, x1: f32, y1: f32, x2: f32, y2: f32, color: u32, stroke_width: f32, )

Draws a line segment.

pub fn draw_round_rect( &self, x: f32, y: f32, w: f32, h: f32, rx: f32, ry: f32, paint: Paint, )

Draws a rounded rectangle.

pub fn draw_path(&self, path: &Path, paint: Paint)

Draws a retained path and keeps it alive through the current batch.

pub fn draw_text_node<T: Node>(&self, node: &T, x: f32, y: f32)

Draws a built retained text node at logical coordinates.

pub fn draw_text_layout(&self, layout: &TextLayout, x: f32, y: f32)

Draws a ready retained text layout.

pub fn draw_dynamic_text_layout( &self, layout: &DynamicTextLayout, x: f32, y: f32, )

Draws a ready frequently-changing fixed-charset text layout.

pub fn draw_image(&self, texture_id: u32, x: f32, y: f32, w: f32, h: f32)

Draws a texture with default linear sampling.

pub fn draw_image_sampling( &self, texture_id: u32, x: f32, y: f32, w: f32, h: f32, sampling: ImageSampling, )

Draws a texture with explicit sampling policy.

pub fn draw_svg(&self, svg_id: u32, x: f32, y: f32, w: f32, h: f32)

Draws a retained SVG resource.

Trait Implementations

impl Clone for DrawContext

fn clone(&self) -> DrawContext

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Default for DrawContext

fn default() -> DrawContext

Returns the “default value” for a type.