Struct pangocairo::FontMap

pub struct FontMap { /* private fields */ }

FontMap is an interface exported by font maps for use with Cairo.

The actual type of the font map will depend on the particular font technology Cairo was compiled to use.

Implements

PangoCairoFontMapExt, pango::prelude::FontMapExt, PangoCairoFontMapExtManual

GLib type: GObject with reference counted clone semantics.

Implementations

impl FontMap

pub const NONE: Option<&'static FontMap> = None

pub fn default() -> FontMap

Gets a default FontMap to use with Cairo.

Note that the type of the returned object will depend on the particular font backend Cairo was compiled to use; you generally should only use the pango::FontMap and FontMap interfaces on the returned object.

The default Cairo fontmap can be changed by using [PangoCairoFontMapExtManual::set_default()][crate::prelude::PangoCairoFontMapExtManual::set_default()]. This can be used to change the Cairo font backend that the default fontmap uses for example.

Note that since Pango 1.32.6, the default fontmap is per-thread. Each thread gets its own default fontmap. In this way, PangoCairo can be used safely from multiple threads.

Returns

the default PangoCairo fontmap for the current thread. This object is owned by Pango and must not be freed.

impl FontMap

pub fn for_font_type(fonttype: FontType) -> Option<FontMap>

pub fn new() -> FontMap

Creates a new FontMap object.

A fontmap is used to cache information about available fonts, and holds certain global parameters such as the resolution. In most cases, you can use `func@PangoCairo.font_map_get_default] instead.

Note that the type of the returned object will depend on the particular font backend Cairo was compiled to use; You generally should only use the pango::FontMap and FontMap interfaces on the returned object.

You can override the type of backend returned by using an environment variable PANGOCAIRO_BACKEND. Supported types, based on your build, are fc (fontconfig), win32, and coretext. If requested type is not available, NULL is returned. Ie. this is only useful for testing, when at least two backends are compiled in.

Returns

the newly allocated pango::FontMap, which should be freed with g_object_unref().

pub fn set_default(font_map: Option<&Self>)

Trait Implementations

impl Clone for FontMap

fn clone(&self) -> Self

Makes a clone of this shared reference.

This increments the strong reference count of the object. Dropping the object will decrement it again.

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

Performs copy-assignment from source.

impl Debug for FontMap

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

Formats the value using the given formatter.

impl HasParamSpec for FontMap

type ParamSpec = ParamSpecObject

type SetValue = FontMap

Preferred value to be used as setter for the associated ParamSpec.

type BuilderFn = fn(_: &str) -> ParamSpecObjectBuilder<'_, FontMap>

fn param_spec_builder() -> Self::BuilderFn

impl Hash for FontMap

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

where H: Hasher,

Hashes the memory address of this object.

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

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for FontMap

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

Comparison for two GObjects.

Compares the memory addresses of the provided objects.

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

where Self: Sized,

Compares and returns the maximum of two values.

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

where Self: Sized,

Compares and returns the minimum of two values.

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

where Self: Sized + PartialOrd,

Restrict a value to a certain interval.

impl<OT: ObjectType> PartialEq<OT> for FontMap

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

Equality for two GObjects.

Two GObjects are equal if their memory addresses are equal.

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<OT: ObjectType> PartialOrd<OT> for FontMap

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

Partial comparison for two GObjects.

Compares the memory addresses of the provided objects.

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 FontMap

fn static_type() -> Type

Returns the type identifier of Self.

impl Eq for FontMap

impl IsA<FontMap> for FontMap