Struct druid::piet::CoreGraphicsContext

pub struct CoreGraphicsContext<'a> { /* fields omitted */ }

Implementations

impl<'a> CoreGraphicsContext<'a>

pub fn new_y_up(ctx: &mut CGContextRef, height: f64) -> CoreGraphicsContext

Create a new context with the y-origin at the top-left corner.

This is not the default for CoreGraphics; but it is the defualt for piet. To map between the two coordinate spaces you must also pass an explicit height argument.

pub fn new_y_down(ctx: &mut CGContextRef) -> CoreGraphicsContext

Create a new context with the y-origin at the bottom right corner.

This is the default for core graphics, but not for piet.

Trait Implementations

impl<'a> Drop for CoreGraphicsContext<'a>

fn drop(&mut self)

Executes the destructor for this type.

impl<'a> IntoBrush<CoreGraphicsContext<'a>> for Brush

fn make_brush(
    &'b self,
    _piet: &mut CoreGraphicsContext,
    _bbox: impl FnOnce() -> Rect
) -> Cow<'b, Brush>

impl<'a> RenderContext for CoreGraphicsContext<'a>

type Brush = Brush

The type of a "brush".

type Text = CoreGraphicsText<'a>

An associated factory for creating text layouts and related resources.

type TextLayout = CoreGraphicsTextLayout

type Image = CGImage

The associated type of an image.

fn clear(&mut self, color: Color)

Clear the canvas with the given color.

fn solid_brush(&mut self, color: Color) -> Brush

Create a new brush resource.

fn gradient(
    &mut self,
    gradient: impl Into<FixedGradient>
) -> Result<Brush, Error>

Create a new gradient brush.

fn fill(
    &mut self,
    shape: impl Shape,
    brush: &impl IntoBrush<CoreGraphicsContext<'a>>
)

Fill a shape.

fn fill_even_odd(
    &mut self,
    shape: impl Shape,
    brush: &impl IntoBrush<CoreGraphicsContext<'a>>
)

Fill a shape, using even-odd fill rule

fn clip(&mut self, shape: impl Shape)

Clip to a shape.

fn stroke(
    &mut self,
    shape: impl Shape,
    brush: &impl IntoBrush<CoreGraphicsContext<'a>>,
    width: f64
)

Stroke a shape.

fn stroke_styled(
    &mut self,
    shape: impl Shape,
    brush: &impl IntoBrush<CoreGraphicsContext<'a>>,
    width: f64,
    style: &StrokeStyle
)

Stroke a shape, with styled strokes.

fn text(&mut self) -> &mut <CoreGraphicsContext<'a> as RenderContext>::Text

fn draw_text(
    &mut self,
    layout: &<CoreGraphicsContext<'a> as RenderContext>::TextLayout,
    pos: impl Into<Point>,
    brush: &impl IntoBrush<CoreGraphicsContext<'a>>
)

Draw a text layout.

fn save(&mut self) -> Result<(), Error>

Save the context state.

fn restore(&mut self) -> Result<(), Error>

Restore the context state.

fn finish(&mut self) -> Result<(), Error>

Finish any pending operations.

fn transform(&mut self, transform: Affine)

Apply a transform.

fn make_image(
    &mut self,
    width: usize,
    height: usize,
    buf: &[u8],
    format: ImageFormat
) -> Result<<CoreGraphicsContext<'a> as RenderContext>::Image, Error>

Create a new image from a pixel buffer.

fn draw_image(
    &mut self,
    image: &<CoreGraphicsContext<'a> as RenderContext>::Image,
    rect: impl Into<Rect>,
    interp: InterpolationMode
)

Draw an image.

fn draw_image_area(
    &mut self,
    image: &<CoreGraphicsContext<'a> as RenderContext>::Image,
    src_rect: impl Into<Rect>,
    dst_rect: impl Into<Rect>,
    _interp: InterpolationMode
)

Draw a specified area of an image.

fn blurred_rect(
    &mut self,
    rect: Rect,
    blur_radius: f64,
    brush: &impl IntoBrush<CoreGraphicsContext<'a>>
)

Draw a rectangle with Gaussian blur.

fn current_transform(&self) -> Affine

Returns the transformations currently applied to the context.

fn status(&mut self) -> Result<(), Error>

Report an internal error.

fn with_save(
    &mut self,
    f: impl FnOnce(&mut Self) -> Result<(), Error>
) -> Result<(), Error>

Do graphics operations with the context state saved and then restored.