Struct TypefaceResponse

pub struct TypefaceResponse {
    pub buffer: Option<Buffer>,
    pub buffer_id: Option<u32>,
    pub font_index: Option<u32>,
    /* private fields */
}

Response to a TypefaceRequest. Contains the digital font file and metadata corresponding to a returned typeface. Clients are expected to cache the results if they plan to reuse them.

If a matching typeface cannot be found, the table will be empty.

Fields

buffer: Option<Buffer>

A memory buffer containing the bytes of a digital font file. It is the client’s responsibility to identify the type of file and to parse it (usually by delegating to FreeType or a similar library).

buffer_id: Option<u32>

Identifier for the buffer. Responses with the same buffer_id are guaranteed to contain the same data in the buffer. Clients may use this value to detect if they already have the font cached in parsed form.

font_index: Option<u32>

Index of the returned typeface within buffer. Used for digital font formats that may contain more than one typeface per file, e.g. TTC (TrueType Collection).

Trait Implementations

impl Debug for TypefaceResponse

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

Formats the value using the given formatter.

impl Decode<TypefaceResponse, DefaultFuchsiaResourceDialect> for TypefaceResponse

fn new_empty() -> Self

Creates a valid instance of Self. The specific value does not matter, since it will be overwritten by decode.

unsafe fn decode( &mut self, decoder: &mut Decoder<'_, DefaultFuchsiaResourceDialect>, offset: usize, depth: Depth, ) -> Result<()>

Decodes an object of type T from the decoder’s buffers into self.

impl Default for TypefaceResponse

fn default() -> TypefaceResponse

Returns the “default value” for a type.

impl Encode<TypefaceResponse, DefaultFuchsiaResourceDialect> for &mut TypefaceResponse

unsafe fn encode( self, encoder: &mut Encoder<'_, DefaultFuchsiaResourceDialect>, offset: usize, depth: Depth, ) -> Result<()>

Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID.

impl PartialEq for TypefaceResponse

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl ResourceTypeMarker for TypefaceResponse

type Borrowed<'a> = &'a mut TypefaceResponse

The Rust type to use for encoding. This is a particular Encode<Self> type cheaply obtainable from &mut Self::Owned. There are three cases:

fn take_or_borrow<'a>( value: &'a mut <Self as TypeMarker>::Owned, ) -> Self::Borrowed<'a>

Cheaply converts from &mut Self::Owned to Self::Borrowed. For HandleBased types this is “take” (it returns an owned handle and replaces value with Handle::invalid), and for all other types it is “borrow” (just converts from one reference to another).

impl TypeMarker for TypefaceResponse

type Owned = TypefaceResponse

The owned Rust type which this FIDL type decodes into.

fn inline_align(_context: Context) -> usize

Returns the minimum required alignment of the inline portion of the encoded object. It must be a (nonzero) power of two.

fn inline_size(_context: Context) -> usize

Returns the size of the inline portion of the encoded object, including padding for alignment. Must be a multiple of inline_align.

fn encode_is_copy() -> bool

Returns true if the memory layout of Self::Owned matches the FIDL wire format and encoding requires no validation. When true, we can optimize encoding arrays and vectors of Self::Owned to a single memcpy.

fn decode_is_copy() -> bool

Returns true if the memory layout of Self::Owned matches the FIDL wire format and decoding requires no validation. When true, we can optimize decoding arrays and vectors of Self::Owned to a single memcpy.

impl Standalone<DefaultFuchsiaResourceDialect> for TypefaceResponse

impl StructuralPartialEq for TypefaceResponse