Struct ComponentTransferNode

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pub struct ComponentTransferNode { /* private fields */ }

Available on crate feature v4_20 only.

Expand description

A render node for applying a ComponentTransfer for each color component of the child node.

GLib type: Shared boxed type with reference counted clone semantics.

Implementations§

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impl ComponentTransferNode

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

Return the inner pointer to the underlying C value.

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pub unsafe fn from_glib_ptr_borrow(ptr: &*mut GskComponentTransferNode) -> &Self

Borrows the underlying C value.

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impl ComponentTransferNode

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pub fn new( child: impl AsRef<RenderNode>, r: &ComponentTransfer, g: &ComponentTransfer, b: &ComponentTransfer, a: &ComponentTransfer, ) -> ComponentTransferNode

Creates a render node that will apply component transfers to a child node.

§`child`

The child to apply component transfers to

§`r`

transfer for the red component

§`g`

transfer for the green component

§`b`

transfer for the blue component

§`a`

transfer for the alpha component

§Returns

A new RenderNode

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pub fn child(&self) -> RenderNode

Gets the child node that is getting drawn by the given @self.

§Returns

the child RenderNode

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pub fn transfer(&self, component: ColorChannel) -> ComponentTransfer

Available on crate feature v4_22 only.

Gets the component transfer for one of the components.

§`component`

the component to get the transfer for

§Returns

the ComponentTransfer

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)

Draws the contents of a render node on a cairo context.

Typically, you’ll use this function to implement fallback rendering of render nodes 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 children(&self) -> Vec<RenderNode>

Available on crate feature v4_22 only.

Gets a list of all children nodes of the rendernode.

Keep in mind that for various rendernodes, their children have different semantics, like the mask vs the source of a mask node. If you care about thse semantics, don’t use this function, use the specific getters instead.

§Returns

The children

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pub fn node_type(&self) -> RenderNodeType

Returns the type of the render node.

§Returns

the type of @self

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pub fn opaque_rect(&self) -> Option<Rect>

Available on crate feature v4_16 only.

Gets an opaque rectangle inside the node that GTK can determine to be fully opaque.

There is no guarantee that this is indeed the largest opaque rectangle or that regions outside the rectangle are not opaque. This function is a best effort with that goal.

The rectangle will be fully contained in the bounds of the node.

§Returns

true if part or all of the rendernode is opaque, false if no opaque region could be found.

§`out_opaque`

return location for the opaque rect

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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.