Struct gsk4::RenderNode

pub struct RenderNode(_);

RenderNode is the basic block in a scene graph to be rendered using Renderer.

Each node has a parent, except the top-level node; each node may have children nodes.

Each node has an associated drawing surface, which has the size of the rectangle set when creating it.

Render nodes are meant to be transient; once they have been associated to a Renderer it’s safe to release any reference you have on them. All RenderNodes are immutable, you can only specify their properties during construction.

This is an Abstract Base Class, you cannot instantiate it.

Implementations

impl RenderNode

pub fn deserialize(bytes: &Bytes) -> Option<Self>

Loads data previously created via serialize().

For a discussion of the supported format, see that function.

bytes

the bytes containing the data

error_func

Callback on parsing errors

Returns

a new RenderNode

pub fn deserialize_with_error_func<P: FnMut(&ParseLocation, &ParseLocation, &Error)>(
    bytes: &Bytes,
    error_func: P
) -> Option<Self>

pub fn downcast<T: IsRenderNode>(self) -> Result<T, Self>

pub fn downcast_ref<T: IsRenderNode>(&self) -> Option<&T>

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

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

pub fn node_type(&self) -> RenderNodeType

Returns the type of the self.

Returns

the type of the RenderNode

pub fn serialize(&self) -> Bytes

Serializes the self for later deserialization via 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 serialize() and 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.

Returns

a GBytes representing the node.

pub fn write_to_file<P: AsRef<Path>>(&self, filename: P) -> Result<(), Error>

This function is equivalent to calling serialize() followed by g_file_set_contents().

See those two functions for details on the arguments.

It is mostly intended for use inside a debugger to quickly dump a render node to a file for later inspection.

filename

the file to save it to.

Returns

true if saving was successful

Trait Implementations

impl AsRef<RenderNode> for BlendNode

fn as_ref(&self) -> &RenderNode

Performs the conversion.

impl AsRef<RenderNode> for BlurNode

fn as_ref(&self) -> &RenderNode

Performs the conversion.

impl AsRef<RenderNode> for DebugNode

fn as_ref(&self) -> &RenderNode

Performs the conversion.

impl AsRef<RenderNode> for GLShaderNode

fn as_ref(&self) -> &RenderNode

Performs the conversion.

impl AsRef<RenderNode> for InsetShadowNode

fn as_ref(&self) -> &RenderNode

Performs the conversion.

impl AsRef<RenderNode> for LinearGradientNode

fn as_ref(&self) -> &RenderNode

Performs the conversion.

impl AsRef<RenderNode> for OpacityNode

fn as_ref(&self) -> &RenderNode

Performs the conversion.

impl AsRef<RenderNode> for OutsetShadowNode

fn as_ref(&self) -> &RenderNode

Performs the conversion.

impl AsRef<RenderNode> for RadialGradientNode

fn as_ref(&self) -> &RenderNode

Performs the conversion.

impl AsRef<RenderNode> for RepeatNode

fn as_ref(&self) -> &RenderNode

Performs the conversion.

impl AsRef<RenderNode> for RepeatingLinearGradientNode

fn as_ref(&self) -> &RenderNode

Performs the conversion.

impl AsRef<RenderNode> for RepeatingRadialGradientNode

fn as_ref(&self) -> &RenderNode

Performs the conversion.

impl AsRef<RenderNode> for BorderNode

fn as_ref(&self) -> &RenderNode

Performs the conversion.

impl AsRef<RenderNode> for RoundedClipNode

fn as_ref(&self) -> &RenderNode

Performs the conversion.

impl AsRef<RenderNode> for ShadowNode

fn as_ref(&self) -> &RenderNode

Performs the conversion.

impl AsRef<RenderNode> for TextNode

fn as_ref(&self) -> &RenderNode

Performs the conversion.

impl AsRef<RenderNode> for TextureNode

fn as_ref(&self) -> &RenderNode

Performs the conversion.

impl AsRef<RenderNode> for TransformNode

fn as_ref(&self) -> &RenderNode

Performs the conversion.

impl AsRef<RenderNode> for CairoNode

fn as_ref(&self) -> &RenderNode

Performs the conversion.

impl AsRef<RenderNode> for ClipNode

fn as_ref(&self) -> &RenderNode

Performs the conversion.

impl AsRef<RenderNode> for ColorMatrixNode

fn as_ref(&self) -> &RenderNode

Performs the conversion.

impl AsRef<RenderNode> for ColorNode

fn as_ref(&self) -> &RenderNode

Performs the conversion.

impl AsRef<RenderNode> for ConicGradientNode

fn as_ref(&self) -> &RenderNode

Performs the conversion.

impl AsRef<RenderNode> for ContainerNode

fn as_ref(&self) -> &RenderNode

Performs the conversion.

impl AsRef<RenderNode> for CrossFadeNode

fn as_ref(&self) -> &RenderNode

Performs the conversion.

impl Clone for RenderNode

fn clone(&self) -> RenderNode

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for RenderNode

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for RenderNode

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Hash for RenderNode

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given Hasher.

impl Ord for RenderNode

fn cmp(&self, other: &RenderNode) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

Restrict a value to a certain interval.

impl PartialEq<RenderNode> for RenderNode

fn eq(&self, other: &RenderNode) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &RenderNode) -> bool

This method tests for !=.

impl PartialOrd<RenderNode> for RenderNode

fn partial_cmp(&self, other: &RenderNode) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl StaticType for RenderNode

fn static_type() -> Type

Returns the type identifier of Self.

impl Eq for RenderNode

impl StructuralEq for RenderNode

impl StructuralPartialEq for RenderNode