Crate zng_ext_font

Font loading, text segmenting and shaping.

Crate

This crate is part of the zng project.

Cargo Features

This crate provides 1 feature flag, not enabled by default.

"hyphenation_embed_all"

Embed hyphenation dictionaries.

See the hyphenation for more details.

Modules

• font_features
  Font features and variation types.

Macros

• font_variations
  Initialize a FontVariations map.

Structs

• BidiLevel
  Embedding Level
• CaretIndex
  Defines an insert offset in a shaped text.
• ColorGlyph
  Represents all layer glyphs selected by the font to replace a colored glyph.
• ColorGlyphs
  COLR table.
• ColorPalette
  Represents a color palette entry.
• ColorPaletteType
  Represents a color palette v1 flag.
• ColorPalettes
  CPAL table.
• CustomFont
  Custom font builder.
• FONTS
  Font loading, custom fonts and app font configuration.
• Font
  A sized font face.
• FontChangedArgs
  FONT_CHANGED_EVENT arguments.
• FontDataRef
  Reference to in memory font data.
• FontFace
  A font face selected from a font family.
• FontFaceList
  A list of FontFace resolved from a FontName list, plus the fallback font.
• FontFaceMetrics
  Various metrics that apply to the entire FontFace.
• FontList
  A list of Font created from a FontFaceList.
• FontManager
  Application extension that manages text fonts.
• FontMetrics
  Various metrics about a Font.
• FontName
  Font family name.
• FontNames
  A list of font names in priority order.
• FontStretch
  The width of a font as an approximate fraction of the normal width.
• FontWeight
  The degree of stroke thickness of a font. This value ranges from 100.0 to 900.0, with 400.0 as normal.
• GenericFonts
  Generic fonts configuration for the app.
• HYPHENATION
  Hyphenation service.
• HyphenationDataDir
  Represents a hyphenation data source that searches a directory.
• HyphenationDataEmbedded
  Represents embedded hyphenation data.
• LayoutDirections
  Identifies what direction segments a ShapedLine has.
• SegmentedText
  A string segmented in sequences of words, spaces, tabs and separated line breaks.
• SegmentedTextIter
  Segmented text iterator.
• ShapedLine
  Represents a line selection of a ShapedText.
• ShapedSegment
  Represents a word or space selection of a ShapedText.
• ShapedText
  Output of text layout.
• TextOverflowInfo
  Info about a shaped text overflow in constraint.
• TextSegment
  Represents a single text segment in a SegmentedText.
• TextShapingArgs
  Extra configuration for shape_text.

Enums

• FontChange
  Possible changes in a FontChangedArgs.
• FontColorPalette
  Color palette selector for colored fonts.
• FontLoadingError
  Reasons why a loader might fail to load a font.
• FontStyle
  The italic or oblique form of a font.
• GlyphLoadingError
  Reasons why a font might fail to load a glyph.
• Hyphens
  Hyphenation mode.
• Justify
  Text alignment justification mode.
• LineBreak
  Configuration of text wrapping for Chinese, Japanese, or Korean text.
• OutlineHintingOptions
  Specifies how hinting (grid fitting) is to be performed (or not performed) for Font::outline.
• ShapedColoredGlyphs
  Represents normal and colored glyphs in ShapedText::colored_glyphs.
• TextSegmentKind
  The type of an inline/text segment.
• TextTransformFn
  Text transform function.
• WhiteSpace
  Text white space transform.
• WordBreak
  Configure line breaks inside words during text wrap.

Statics

• FONT_CHANGED_EVENT
  Change in FONTS that may cause a font query to now give a different result.

Traits

• HyphenationDataSource
  Represents a hyphenation dictionary source.
• OutlineSink
  Receives Bézier path rendering commands from Font::outline.

Functions

• f32_cmp
  f32 comparison, panics for NaN.
• unicode_bidi_levels
  Compute initial bidirectional levels of each segment of a line.
• unicode_bidi_sort
  Compute a map of segments in line to their final LTR display order.

Type Aliases

• FontSize
  Text font size.
• LetterSpacing
  Extra spacing added in between text letters.
• LineHeight
  Text line height.
• LineSpacing
  Extra spacing in-between text lines.
• ParagraphSpacing
  Extra spacing in-between paragraphs.
• TabLength
  Length of a TAB space.
• TextLineThickness
  Height of the text overline or strikethrough decoration.
• UnderlineThickness
  Height of the text underline decoration.
• WordSpacing
  Extra spacing added to the Unicode U+0020 SPACE character.