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PlatformFontMethods

fonts

Trait PlatformFontMethods 

Source 
pub trait PlatformFontMethods: Sized {

Show 14 methods    // Required methods
    fn new_from_local_font_identifier(
        font_identifier: LocalFontIdentifier,
        pt_size: Option<Au>,
        synthetic_bold: bool,
    ) -> Result<PlatformFont, &'static str>;
    fn new_from_data(
        font_identifier: FontIdentifier,
        data: &FontData,
        pt_size: Option<Au>,
        synthetic_bold: bool,
    ) -> Result<PlatformFont, &'static str>;
    fn copy_with_variations(
        self,
        _font_identifer: &FontIdentifier,
        _variations: &[FontVariation],
    ) -> Result<Self, &'static str>;
    fn descriptor(&self) -> FontTemplateDescriptor;
    fn glyph_index(&self, codepoint: char) -> Option<u32>;
    fn glyph_h_advance(&self, _: u32) -> Option<f64>;
    fn glyph_h_kerning(&self, glyph0: u32, glyph1: u32) -> f64;
    fn metrics(&self) -> FontMetrics;
    fn table_for_tag(&self, _: Tag) -> Option<FontTable>;
    fn typographic_bounds(&self, _: u32) -> Rect<f32>;
    fn webrender_font_instance_flags(&self) -> FontInstanceFlags;
    fn variations(&self) -> &[FontVariation];

    // Provided methods
    fn new_from_template(
        template: FontTemplateRef,
        pt_size: Option<Au>,
        data: &Option<FontData>,
        synthetic_bold: bool,
    ) -> Result<PlatformFont, &'static str> { ... }
    fn descriptor_from_os2_table(os2: &Os2<'_>) -> FontTemplateDescriptor { ... }

}

Required Methods§

Source

fn new_from_local_font_identifier( font_identifier: LocalFontIdentifier, pt_size: Option<Au>, synthetic_bold: bool, ) -> Result<PlatformFont, &'static str>

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fn new_from_data( font_identifier: FontIdentifier, data: &FontData, pt_size: Option<Au>, synthetic_bold: bool, ) -> Result<PlatformFont, &'static str>

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fn copy_with_variations( self, _font_identifer: &FontIdentifier, _variations: &[FontVariation], ) -> Result<Self, &'static str>

Create a platform font with the given variations from a existing font.

self is consumed to work around platform differences. On some platforms, changing the variations requires creating an entirely new font face, whereas on others the returned font is self.

Source

fn descriptor(&self) -> FontTemplateDescriptor

Get a FontTemplateDescriptor from a PlatformFont. This is used to get descriptors for web fonts.

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fn glyph_index(&self, codepoint: char) -> Option<u32>

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fn glyph_h_advance(&self, _: u32) -> Option<f64>

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fn glyph_h_kerning(&self, glyph0: u32, glyph1: u32) -> f64

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fn metrics(&self) -> FontMetrics

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fn table_for_tag(&self, _: Tag) -> Option<FontTable>

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fn typographic_bounds(&self, _: u32) -> Rect<f32>

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fn webrender_font_instance_flags(&self) -> FontInstanceFlags

Get the necessary FontInstanceFlags` for this font.

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fn variations(&self) -> &[FontVariation]

Return all the variation values that the font was instantiated with.

Provided Methods§

Source

fn new_from_template( template: FontTemplateRef, pt_size: Option<Au>, data: &Option<FontData>, synthetic_bold: bool, ) -> Result<PlatformFont, &'static str>

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fn descriptor_from_os2_table(os2: &Os2<'_>) -> FontTemplateDescriptor

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors§