Enum CachedImageData

pub enum CachedImageData {
    Raw(Arc<Vec<u8>>),
    Blob,
    Snapshot,
    External(ExternalImageData),
}

Represents the backing store of an image in the cache. This storage can take several forms.

Variants

Raw(Arc<Vec<u8>>)

A simple series of bytes, provided by the embedding and owned by WebRender. The format is stored out-of-band, currently in ImageDescriptor.

Blob

An series of commands that can be rasterized into an image via an embedding-provided callback.

The commands are stored elsewhere and this variant is used as a placeholder.

Snapshot

A stacking context for which a snapshot has been requested.

The snapshot is grabbed from GPU-side rasterized pixels so there is no CPU-side data to store here.

External(ExternalImageData)

An image owned by the embedding, and referenced by WebRender. This may take the form of a texture or a heap-allocated buffer.

Implementations

impl CachedImageData

pub fn is_blob(&self) -> bool

Returns true if this represents a blob.

pub fn is_snapshot(&self) -> bool

pub fn uses_texture_cache(&self) -> bool

Returns true if this variant of CachedImageData should go through the texture cache.

Trait Implementations

impl Clone for CachedImageData

fn clone(&self) -> CachedImageData

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for CachedImageData

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

Formats the value using the given formatter.

impl From<ImageData> for CachedImageData

fn from(img_data: ImageData) -> Self

Converts to this type from the input type.