Struct layout_2013::Fragment

pub struct Fragment {

    pub node: OpaqueNode,
    pub style: Arc<ComputedValues>,
    pub selected_style: Arc<ComputedValues>,
    pub border_box: LogicalRect<Au>,
    pub border_padding: LogicalMargin<Au>,
    pub margin: LogicalMargin<Au>,
    pub specific: SpecificFragmentInfo,
    pub inline_context: Option<InlineFragmentContext>,
    pub restyle_damage: RestyleDamage,
    pub pseudo: PseudoElementType,
    pub flags: FragmentFlags,
    debug_id: DebugId,
    pub stacking_context_id: StackingContextId,
    pub established_reference_frame: Option<ClipScrollNodeIndex>,
}

Fragments (struct Fragment) are the leaves of the layout tree. They cannot position themselves. In general, fragments do not have a simple correspondence with CSS fragments in the specification:

• Several fragments may correspond to the same CSS box or DOM node. For example, a CSS text box broken across two lines is represented by two fragments.

• Some CSS fragments are not created at all, such as some anonymous block fragments induced by inline fragments with block-level sibling fragments. In that case, Servo uses an InlineFlow with BlockFlow siblings; the InlineFlow is block-level, but not a block container. It is positioned as if it were a block fragment, but its children are positioned according to inline flow.

A SpecificFragmentInfo::Generic is an empty fragment that contributes only borders, margins, padding, and backgrounds. It is analogous to a CSS nonreplaced content box.

A fragment’s type influences how its styles are interpreted during layout. For example, replaced content such as images are resized differently from tables, text, or other content. Different types of fragments may also contain custom data; for example, text fragments contain text.

Do not add fields to this structure unless they’re really really mega necessary! Fragments get moved around a lot and thus their size impacts performance of layout quite a bit.

FIXME(#2260, pcwalton): This can be slimmed down some by (at least) moving inline_context to be on InlineFlow only.

Fields

node: OpaqueNode

An opaque reference to the DOM node that this Fragment originates from.

style: Arc<ComputedValues>

The CSS style of this fragment.

selected_style: Arc<ComputedValues>

The CSS style of this fragment when it’s selected

border_box: LogicalRect<Au>

The position of this fragment relative to its owning flow. The size includes padding and border, but not margin.

NB: This does not account for relative positioning. NB: Collapsed borders are not included in this.

border_padding: LogicalMargin<Au>

The sum of border and padding; i.e. the distance from the edge of the border box to the content edge of the fragment.

margin: LogicalMargin<Au>

The margin of the content box.

specific: SpecificFragmentInfo

Info specific to the kind of fragment. Keep this enum small.

inline_context: Option<InlineFragmentContext>

Holds the style context information for fragments that are part of an inline formatting context.

restyle_damage: RestyleDamage

How damaged this fragment is since last reflow.

pseudo: PseudoElementType

The pseudo-element that this fragment represents.

flags: FragmentFlags

Various flags for this fragment.

debug_id: DebugId

A debug ID that is consistent for the life of this fragment (via transform etc). This ID should not be considered stable across multiple layouts or fragment manipulations.

stacking_context_id: StackingContextId

The ID of the StackingContext that contains this fragment. This is initialized to 0, but it assigned during the collect_stacking_contexts phase of display list construction.

established_reference_frame: Option<ClipScrollNodeIndex>

The indices of this Fragment’s ClipScrollNode. If this fragment doesn’t have a established_reference_frame assigned, it will use the clipping_and_scrolling of the parent block.

Implementations

impl Fragment

pub fn collect_stacking_contexts_for_blocklike_fragment( &mut self, state: &mut StackingContextCollectionState, ) -> bool

pub fn create_stacking_context_for_inline_block( &mut self, base: &BaseFlow, state: &mut StackingContextCollectionState, ) -> bool

fn build_display_list_for_background_if_applicable( &self, state: &mut DisplayListBuildState<'_>, style: &ComputedValues, display_list_section: DisplayListSection, absolute_bounds: Rect<Au>, )

Adds the display items necessary to paint the background of this fragment to the display list if necessary.

fn build_display_list_for_background_if_applicable_with_background( &self, state: &mut DisplayListBuildState<'_>, style: &ComputedValues, background: &Background, background_color: AbsoluteColor, display_list_section: DisplayListSection, absolute_bounds: Rect<Au>, )

Same as build_display_list_for_background_if_applicable, but lets you override the actual background used

fn build_display_list_for_webrender_image( &self, state: &mut DisplayListBuildState<'_>, style: &ComputedValues, display_list_section: DisplayListSection, absolute_bounds: Rect<Au>, webrender_image: WebRenderImageInfo, index: usize, )

Adds the display items necessary to paint a webrender image of this fragment to the appropriate section of the display list.

fn get_webrender_image_for_paint_worklet( &self, state: &mut DisplayListBuildState<'_>, style: &ComputedValues, paint_worklet: &PaintWorklet, size_in_au: Size2D<Au>, ) -> Option<WebRenderImageInfo>

Calculates the webrender image for a paint worklet. Returns None if the worklet is not registered. If the worklet has missing image URLs, it passes them to the image cache for loading.

fn build_display_list_for_background_gradient( &self, state: &mut DisplayListBuildState<'_>, display_list_section: DisplayListSection, absolute_bounds: Rect<Au>, gradient: &Gradient, style: &ComputedValues, index: usize, )

Adds the display items necessary to paint the background linear gradient of this fragment to the appropriate section of the display list.

fn build_display_list_for_box_shadow_if_applicable( &self, state: &mut DisplayListBuildState<'_>, style: &ComputedValues, display_list_section: DisplayListSection, absolute_bounds: Rect<Au>, clip: Rect<Au>, )

Adds the display items necessary to paint the box shadow of this fragment to the display list if necessary.

fn build_display_list_for_borders_if_applicable( &self, state: &mut DisplayListBuildState<'_>, style: &ComputedValues, inline_info: Option<InlineNodeBorderInfo>, border_painting_mode: BorderPaintingMode<'_>, bounds: Rect<Au>, display_list_section: DisplayListSection, clip: Rect<Au>, )

Adds the display items necessary to paint the borders of this fragment to a display list if necessary.

fn build_display_list_for_border_image( &self, state: &mut DisplayListBuildState<'_>, style: &ComputedValues, base: BaseDisplayItem, bounds: Rect<Au>, image: &Image, border_width: UntypedSideOffsets2D<Au>, ) -> Option<()>

Add display item for image border.

Returns Some if the addition was successful.

fn build_display_list_for_outline_if_applicable( &self, state: &mut DisplayListBuildState<'_>, style: &ComputedValues, bounds: Rect<Au>, clip: Rect<Au>, )

Adds the display items necessary to paint the outline of this fragment to the display list if necessary.

fn build_debug_borders_around_text_fragments( &self, state: &mut DisplayListBuildState<'_>, style: &ComputedValues, stacking_relative_border_box: Rect<Au>, stacking_relative_content_box: Rect<Au>, text_fragment: &ScannedTextFragmentInfo, clip: Rect<Au>, )

Adds display items necessary to draw debug boxes around a scanned text fragment.

fn build_debug_borders_around_fragment( &self, state: &mut DisplayListBuildState<'_>, stacking_relative_border_box: Rect<Au>, clip: Rect<Au>, )

Adds display items necessary to draw debug boxes around this fragment.

fn build_display_items_for_selection_if_necessary( &self, state: &mut DisplayListBuildState<'_>, stacking_relative_border_box: Rect<Au>, display_list_section: DisplayListSection, )

Builds the display items necessary to paint the selection and/or caret for this fragment, if any.

pub fn build_display_list( &mut self, state: &mut DisplayListBuildState<'_>, stacking_relative_border_box: Rect<Au>, border_painting_mode: BorderPaintingMode<'_>, display_list_section: DisplayListSection, clip: Rect<Au>, overflow_content_size: Option<Size2D<Au>>, )

Adds the display items for this fragment to the given display list.

Arguments:

• state: The display building state, including the display list currently under construction and other metadata useful for constructing it.
• dirty: The dirty rectangle in the coordinate system of the owning flow.
• clip: The region to clip the display items to.
• overflow_content_size: The size of content associated with this fragment that must have overflow handling applied to it. For a scrollable block flow, it is expected that this is the size of the child boxes.

fn build_display_list_no_damage( &self, state: &mut DisplayListBuildState<'_>, stacking_relative_border_box: Rect<Au>, border_painting_mode: BorderPaintingMode<'_>, display_list_section: DisplayListSection, clip: Rect<Au>, overflow_content_size: Option<Size2D<Au>>, )

build_display_list, but don’t update the restyle damage

Must be paired with a self.restyle_damage.remove(REPAINT) somewhere

fn build_fragment_type_specific_display_items( &self, state: &mut DisplayListBuildState<'_>, stacking_relative_border_box: Rect<Au>, clip: Rect<Au>, )

A helper method that build_display_list calls to create per-fragment-type display items.

fn create_stacking_context( &self, id: StackingContextId, base_flow: &BaseFlow, context_type: StackingContextType, established_reference_frame: Option<ClipScrollNodeIndex>, parent_clipping_and_scrolling: ClippingAndScrolling, ) -> StackingContext

Creates a stacking context for associated fragment.

fn build_display_list_for_text_fragment( &self, state: &mut DisplayListBuildState<'_>, text_fragment: &ScannedTextFragmentInfo, stacking_relative_content_box: Rect<Au>, text_shadows: &[SimpleShadow], clip: Rect<Au>, )

Creates the text display item for one text fragment. This can be called multiple times for one fragment if there are text shadows.

text_shadow will be Some if this is rendering a shadow.

fn build_display_list_for_text_decoration( &self, state: &mut DisplayListBuildState<'_>, color: &AbsoluteColor, stacking_relative_box: &LogicalRect<Au>, clip: Rect<Au>, )

Creates the display item for a text decoration: underline, overline, or line-through.

fn unique_id(&self) -> u64

fn fragment_type(&self) -> FragmentType

impl Fragment

pub fn new<'dom>( node: &impl ThreadSafeLayoutNode<'dom>, specific: SpecificFragmentInfo, ctx: &LayoutContext<'_>, ) -> Fragment

Constructs a new Fragment instance.

pub fn from_opaque_node_and_style( node: OpaqueNode, pseudo: PseudoElementType, style: ServoArc<ComputedValues>, selected_style: ServoArc<ComputedValues>, restyle_damage: RestyleDamage, specific: SpecificFragmentInfo, ) -> Fragment

Constructs a new Fragment instance from an opaque node.

pub fn create_similar_anonymous_fragment( &self, style: ServoArc<ComputedValues>, specific: SpecificFragmentInfo, ) -> Fragment

Creates an anonymous fragment just like this one but with the given style and fragment type. For the new anonymous fragment, layout-related values (border box, etc.) are reset to initial values.

pub fn transform( &self, size: LogicalSize<Au>, info: SpecificFragmentInfo, ) -> Fragment

Transforms this fragment into another fragment of the given type, with the given size, preserving all the other data.

pub fn transform_with_split_info( &self, split: &SplitInfo, text_run: Arc<TextRun>, first: bool, ) -> Fragment

Transforms this fragment using the given SplitInfo, preserving all the other data.

If this is the first half of a split, first is true

pub fn transform_into_ellipsis( &self, layout_context: &LayoutContext<'_>, text_overflow_string: String, ) -> Fragment

Transforms this fragment into an ellipsis fragment, preserving all the other data.

pub fn restyle_damage(&self) -> RestyleDamage

pub fn contains_node(&self, node_address: OpaqueNode) -> bool

pub fn add_inline_context_style(&mut self, node_info: InlineFragmentNodeInfo)

Adds a style to the inline context for this fragment. If the inline context doesn’t exist yet, it will be created.

fn quantities_included_in_intrinsic_inline_size( &self, ) -> QuantitiesIncludedInIntrinsicInlineSizes

Determines which quantities (border/padding/margin/specified) should be included in the intrinsic inline size of this fragment.

pub fn surrounding_intrinsic_inline_size(&self) -> (Au, Au)

Returns the portion of the intrinsic inline-size that consists of borders/padding and margins, respectively.

FIXME(#2261, pcwalton): This won’t work well for inlines: is this OK?

pub fn style_specified_intrinsic_inline_size( &self, ) -> IntrinsicISizesContribution

Uses the style only to estimate the intrinsic inline-sizes. These may be modified for text or replaced elements.

pub fn intrinsic_width(&self) -> Au

intrinsic width of this replaced element.

pub fn intrinsic_height(&self) -> Au

intrinsic width of this replaced element.

pub fn has_intrinsic_ratio(&self) -> bool

Whether this replace element has intrinsic aspect ratio.

pub fn calculate_replaced_sizes( &self, containing_inline_size: Option<Au>, containing_block_size: Option<Au>, ) -> (Au, Au)

CSS 2.1 § 10.3.2 & 10.6.2 Calculate the used width and height of a replaced element. When a parameter is None it means the specified size in certain direction is unconstrained. The inline containing size can also be None since this method is also used for calculating intrinsic inline size contribution.

pub fn size_constraint( &self, containing_size: Option<Au>, direction: Direction, ) -> SizeConstraint

Return a size constraint that can be used the clamp size in given direction. To take box-sizing: border-box into account, the border_padding field must be initialized first.

TODO(stshine): Maybe there is a more convenient way.

pub fn guess_inline_content_edge_offsets( &self, ) -> SpeculatedInlineContentEdgeOffsets

Returns a guess as to the distances from the margin edge of this fragment to its content in the inline direction. This will generally be correct unless percentages are involved.

This is used for the float placement speculation logic.

pub fn border_width(&self) -> LogicalMargin<Au>

Returns the sum of the inline-sizes of all the borders of this fragment. Note that this can be expensive to compute, so if possible use the border_padding field instead.

pub fn box_sizing_boundary(&self, direction: Direction) -> Au

Returns the border width in given direction if this fragment has property ‘box-sizing: border-box’. The border_padding field must have been initialized.

pub fn compute_inline_direction_margins( &mut self, containing_block_inline_size: Au, )

Computes the margins in the inline direction from the containing block inline-size and the style. After this call, the inline direction of the margin field will be correct.

Do not use this method if the inline direction margins are to be computed some other way (for example, via constraint solving for blocks).

pub fn compute_block_direction_margins( &mut self, containing_block_inline_size: Au, )

Computes the margins in the block direction from the containing block inline-size and the style. After this call, the block direction of the margin field will be correct.

Do not use this method if the block direction margins are to be computed some other way (for example, via constraint solving for absolutely-positioned flows).

pub fn compute_border_and_padding(&mut self, containing_block_inline_size: Au)

Computes the border and padding in both inline and block directions from the containing block inline-size and the style. After this call, the border_padding field will be correct.

pub fn relative_position( &self, containing_block_size: &LogicalSize<Au>, ) -> LogicalSize<Au>

pub fn clear(&self) -> Option<ClearType>

Always inline for SCCP.

FIXME(pcwalton): Just replace with the clear type from the style module for speed?

pub fn style(&self) -> &ComputedValues

pub fn selected_style(&self) -> &ComputedValues

pub fn white_space_collapse(&self) -> WhiteSpaceCollapse

pub fn text_wrap_mode(&self) -> TextWrapMode

pub fn color(&self) -> Color

pub fn text_decoration_line(&self) -> TextDecorationLine

Returns the text decoration line of this fragment, according to the style of the nearest ancestor element.

NB: This may not be the actual text decoration line, because of the override rules specified in CSS 2.1 § 16.3.1. Unfortunately, computing this properly doesn’t really fit into Servo’s model. Therefore, this is a best lower bound approximation, but the end result may actually have the various decoration flags turned on afterward.

pub fn inline_start_offset(&self) -> Au

Returns the inline-start offset from margin edge to content edge.

FIXME(#2262, pcwalton): I think this method is pretty bogus, because it won’t work for inlines.

pub fn column_span(&self) -> u32

If this is a Column fragment, get the col span

Panics for non-column fragments

pub fn can_split(&self) -> bool

Returns true if this element can be split. This is true for text fragments, unless white-space: pre or white-space: nowrap is set.

pub fn is_unscanned_generated_content(&self) -> bool

Returns true if and only if this fragment is a generated content fragment.

pub fn is_scanned_text_fragment(&self) -> bool

Returns true if and only if this is a scanned text fragment.

pub fn suppress_line_break_before(&self) -> bool

pub fn compute_intrinsic_inline_sizes(&mut self) -> IntrinsicISizesContribution

Computes the intrinsic inline-sizes of this fragment.

pub fn minimum_splittable_inline_size(&self) -> Au

Returns the narrowest inline-size that the first splittable part of this fragment could possibly be split to. (In most cases, this returns the inline-size of the first word in this fragment.)

pub fn content_box(&self) -> LogicalRect<Au>

Returns the dimensions of the content box.

This is marked #[inline] because it is frequently called when only one or two of the values are needed and that will save computation.

pub fn calculate_split_position( &self, max_inline_size: Au, starts_line: bool, ) -> Option<SplitResult>

Attempts to find the split positions of a text fragment so that its inline-size is no more than max_inline_size.

A return value of None indicates that the fragment could not be split. Otherwise the information pertaining to the split is returned. The inline-start and inline-end split information are both optional due to the possibility of them being whitespace.

pub fn is_on_glyph_run_boundary(&self) -> bool

Does this fragment start on a glyph run boundary?

pub fn truncate_to_inline_size(self, max_inline_size: Au) -> Fragment

Truncates this fragment to the given max_inline_size, using a character-based breaking strategy. The resulting fragment will have SpecificFragmentInfo::TruncatedFragment, preserving the original fragment for use in incremental reflow.

This function will panic if self is already truncated.

fn calculate_truncate_to_inline_size( &self, max_inline_size: Au, ) -> Option<TruncationResult>

Truncates this fragment to the given max_inline_size, using a character-based breaking strategy. If no characters could fit, returns None.

fn calculate_split_position_using_breaking_strategy<'a, I>( &self, slice_iterator: I, max_inline_size: Au, flags: SplitOptions, ) -> Option<SplitResult>

where I: Iterator<Item = TextRunSlice<'a>>,

A helper method that uses the breaking strategy described by slice_iterator (at present, either natural word breaking or character breaking) to split this fragment.

pub fn merge_with(&mut self, next_fragment: Fragment)

The opposite of calculate_split_position_using_breaking_strategy: merges this fragment with the next one.

pub fn reset_text_range_and_inline_size(&mut self)

Restore any whitespace that was stripped from a text fragment, and recompute inline metrics if necessary.

pub fn assign_replaced_inline_size_if_necessary( &mut self, container_inline_size: Au, container_block_size: Option<Au>, )

Assigns replaced inline-size, padding, and margins for this fragment only if it is replaced content per CSS 2.1 § 10.3.2.

pub fn assign_replaced_block_size_if_necessary(&mut self)

Assign block-size for this fragment if it is replaced content. The inline-size must have been assigned first.

Ideally, this should follow CSS 2.1 § 10.6.2.

pub fn is_replaced(&self) -> bool

Returns true if this fragment is replaced content.

pub fn is_replaced_or_inline_block(&self) -> bool

Returns true if this fragment is replaced content or an inline-block or false otherwise.

fn content_inline_metrics( &self, layout_context: &LayoutContext<'_>, ) -> InlineMetrics

Calculates block-size above baseline, depth below baseline, and ascent for this fragment when used in an inline formatting context. See CSS 2.1 § 10.8.1.

This does not take vertical-align into account. For that, use aligned_inline_metrics().

fn vertical_alignment_offset( &self, layout_context: &LayoutContext<'_>, content_inline_metrics: &InlineMetrics, minimum_line_metrics: &LineMetrics, actual_line_metrics: Option<&LineMetrics>, ) -> Au

Calculates the offset from the baseline that applies to this fragment due to vertical-align. Positive values represent downward displacement.

If actual_line_metrics is supplied, then these metrics are used to determine the displacement of the fragment when top or bottom vertical-align values are encountered. If this is not supplied, then top and bottom values are ignored.

pub fn aligned_inline_metrics( &self, layout_context: &LayoutContext<'_>, minimum_line_metrics: &LineMetrics, actual_line_metrics: Option<&LineMetrics>, ) -> InlineMetrics

Calculates block-size above baseline, depth below baseline, and ascent for this fragment when used in an inline formatting context, taking vertical-align (other than top or bottom) into account. See CSS 2.1 § 10.8.1.

If actual_line_metrics is supplied, then these metrics are used to determine the displacement of the fragment when top or bottom vertical-align values are encountered. If this is not supplied, then top and bottom values are ignored.

pub fn is_hypothetical(&self) -> bool

Returns true if this fragment is a hypothetical box. See CSS 2.1 § 10.3.7.

pub fn can_merge_with_fragment(&self, other: &Fragment) -> bool

Returns true if this fragment can merge with another immediately-following fragment or false otherwise.

pub fn is_primary_fragment(&self) -> bool

Returns true if and only if this is the primary fragment for the fragment’s style object (conceptually, though style sharing makes this not really true, of course). The primary fragment is the one that draws backgrounds, borders, etc., and takes borders, padding and margins into account. Every style object has at most one primary fragment.

At present, all fragments are primary fragments except for inline-block and table wrapper fragments. Inline-block fragments are not primary fragments because the corresponding block flow is the primary fragment, while table wrapper fragments are not primary fragments because the corresponding table flow is the primary fragment.

pub fn update_late_computed_replaced_inline_size_if_necessary(&mut self)

Determines the inline sizes of inline-block fragments. These cannot be fully computed until inline size assignment has run for the child flow: thus it is computed “late”, during block size assignment.

pub fn update_late_computed_inline_position_if_necessary(&mut self)

pub fn update_late_computed_block_position_if_necessary(&mut self)

pub fn repair_style(&mut self, new_style: &ServoArc<ComputedValues>)

pub fn stacking_relative_border_box( &self, stacking_relative_flow_origin: &Vector2D<Au>, relative_containing_block_size: &LogicalSize<Au>, relative_containing_block_mode: WritingMode, coordinate_system: CoordinateSystem, ) -> Rect<Au>

Given the stacking-context-relative position of the containing flow, returns the border box of this fragment relative to the parent stacking context. This takes position: relative into account.

If coordinate_system is Parent, this returns the border box in the parent stacking context’s coordinate system. Otherwise, if coordinate_system is Own and this fragment establishes a stacking context itself, this returns a border box anchored at (0, 0). (If this fragment does not establish a stacking context, then it always belongs to its parent stacking context and thus coordinate_system is ignored.)

This is the method you should use for display list construction as well as getBoundingClientRect() and so forth.

pub fn stacking_relative_content_box( &self, stacking_relative_border_box: Rect<Au>, ) -> Rect<Au>

Given the stacking-context-relative border box, returns the stacking-context-relative content box.

pub fn can_establish_reference_frame(&self) -> bool

Returns true if this fragment may establish a reference frame.

pub fn has_filter_transform_or_perspective(&self) -> bool

Returns true if this fragment has a filter, transform, or perspective property set.

pub fn has_non_invertible_transform_or_zero_scale(&self) -> bool

Returns true if this fragment has a transform applied that causes it to take up no space.

pub fn establishes_stacking_context(&self) -> bool

Returns true if this fragment establishes a new stacking context and false otherwise.

pub fn effective_z_index(&self) -> i32

pub fn compute_overflow( &self, flow_size: &Size2D<Au>, relative_containing_block_size: &LogicalSize<Au>, ) -> Overflow

Computes the overflow rect of this fragment relative to the start of the flow.

pub fn requires_line_break_afterward_if_wrapping_on_newlines(&self) -> bool

pub fn strip_leading_whitespace_if_necessary( &mut self, ) -> WhitespaceStrippingResult

pub fn strip_trailing_whitespace_if_necessary( &mut self, ) -> WhitespaceStrippingResult

Returns true if the entire fragment was stripped.

pub fn inline_styles(&self) -> InlineStyleIterator<'_>

pub fn margin_box_inline_size(&self) -> Au

Returns the inline-size of this fragment’s margin box.

pub fn is_positioned(&self) -> bool

Returns true if this node or any of the nodes within its inline fragment context have non-static position.

pub fn is_absolutely_positioned(&self) -> bool

Returns true if this node is absolutely positioned.

pub fn is_inline_absolute(&self) -> bool

pub fn meld_with_next_inline_fragment(&mut self, next_fragment: &Fragment)

pub fn meld_with_prev_inline_fragment(&mut self, prev_fragment: &Fragment)

pub fn is_vertically_aligned_to_top_or_bottom(&self) -> bool

Returns true if any of the inline styles associated with this fragment have vertical-align set to top or bottom.

pub fn is_text_or_replaced(&self) -> bool

pub fn transform_matrix( &self, stacking_relative_border_box: &Rect<Au>, ) -> Option<LayoutTransform>

Returns the 4D matrix representing this fragment’s transform.

pub fn perspective_matrix( &self, stacking_relative_border_box: &Rect<Au>, ) -> Option<LayoutTransform>

Returns the 4D matrix representing this fragment’s perspective.

Trait Implementations

impl Clone for Fragment

fn clone(&self) -> Fragment

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Fragment

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

Formats the value using the given formatter.

impl Serialize for Fragment

fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error>

Serialize this value into the given Serde serializer.