Struct gsk4::ConicGradientNode

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pub struct ConicGradientNode { /* private fields */ }

Expand description

A render node for a conic gradient.

Implementations§

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impl ConicGradientNode

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pub fn as_ptr(&self) -> *mut GskConicGradientNode

Return the inner pointer to the underlying C value.

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pub unsafe fn from_glib_ptr_borrow<'a>( ptr: const const GskConicGradientNode ) -> &'a Self

Borrows the underlying C value.

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impl ConicGradientNode

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pub fn new( bounds: &Rect, center: &Point, rotation: f32, color_stops: &[ColorStop] ) -> ConicGradientNode

Creates a RenderNode that draws a conic gradient.

The conic gradient starts around @center in the direction of @rotation. A rotation of 0 means that the gradient points up. Color stops are then added clockwise.

§`bounds`

the bounds of the node

§`center`

the center of the gradient

§`rotation`

the rotation of the gradient in degrees

§`color_stops`

a pointer to an array of ColorStop defining the gradient. The offsets of all color stops must be increasing. The first stop’s offset must be >= 0 and the last stop’s offset must be <= 1.

§Returns

A new RenderNode

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pub fn angle(&self) -> f32

Available on crate feature v4_2 only.

Retrieves the angle for the gradient in radians, normalized in [0, 2 * PI].

The angle is starting at the top and going clockwise, as expressed in the css specification:

angle = 90 - gsk_conic_gradient_node_get_rotation()

§Returns

the angle for the gradient

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pub fn center(&self) -> Point

Retrieves the center pointer for the gradient.

§Returns

the center point for the gradient

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pub fn color_stops(&self) -> Vec<ColorStop>

Retrieves the color stops in the gradient.

§Returns

the color stops in the gradient

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pub fn n_color_stops(&self) -> usize

Retrieves the number of color stops in the gradient.

§Returns

the number of color stops

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pub fn rotation(&self) -> f32

Retrieves the rotation for the gradient in degrees.

§Returns

the rotation for the gradient

Methods from Deref<Target = RenderNode>§

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pub fn as_ptr(&self) -> *mut GskRenderNode

Return the inner pointer to the underlying C value.

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pub const NONE: Option<&'static RenderNode> = None

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pub fn draw(&self, cr: &Context)

Draw the contents of @self to the given cairo context.

Typically, you’ll use this function to implement fallback rendering of RenderNodes on an intermediate Cairo context, instead of using the drawing context associated to a gdk::Surface’s rendering buffer.

For advanced nodes that cannot be supported using Cairo, in particular for nodes doing 3D operations, this function may fail.

§`cr`

cairo context to draw to

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pub fn bounds(&self) -> Rect

Retrieves the boundaries of the @self.

The node will not draw outside of its boundaries.

§Returns

§`bounds`

return location for the boundaries

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pub fn node_type(&self) -> RenderNodeType

Returns the type of the @self.

§Returns

the type of the RenderNode

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pub fn serialize(&self) -> Bytes

Serializes the @self for later deserialization via gsk_render_node_deserialize(). No guarantees are made about the format used other than that the same version of GTK will be able to deserialize the result of a call to gsk_render_node_serialize() and gsk_render_node_deserialize() will correctly reject files it cannot open that were created with previous versions of GTK.

The intended use of this functions is testing, benchmarking and debugging. The format is not meant as a permanent storage format.