Struct gsk4::RadialGradientNode

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pub struct RadialGradientNode { /* private fields */ }

Expand description

A render node for a radial gradient.

Implementations§

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impl RadialGradientNode

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

Return the inner pointer to the underlying C value.

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

Borrows the underlying C value.

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impl RadialGradientNode

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pub fn new( bounds: &Rect, center: &Point, hradius: f32, vradius: f32, start: f32, end: f32, color_stops: &[ColorStop] ) -> RadialGradientNode

Creates a RenderNode that draws a radial gradient.

The radial gradient starts around @center. The size of the gradient is dictated by @hradius in horizontal orientation and by @vradius in vertical orientation.

§`bounds`

the bounds of the node

§`center`

the center of the gradient

§`hradius`

the horizontal radius

§`vradius`

the vertical radius

§`start`

a percentage >= 0 that defines the start of the gradient around @center

§`end`

a percentage >= 0 that defines the end of the gradient around @center

§`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 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 end(&self) -> f32

Retrieves the end value for the gradient.

§Returns

the end value for the gradient

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pub fn hradius(&self) -> f32

Retrieves the horizontal radius for the gradient.

§Returns

the horizontal radius for 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 start(&self) -> f32

Retrieves the start value for the gradient.

§Returns

the start value for the gradient

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pub fn vradius(&self) -> f32

Retrieves the vertical radius for the gradient.

§Returns

the vertical radius 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.