Struct BufferSource 

pub struct BufferSource { /* private fields */ }

A producer over pixels already in memory.

The buffer is shared, not copied, so cloning is cheap and two graphs can root at the same pixels.

Implementations

impl BufferSource

pub fn new(descriptor: ImageDescriptor, buffer: Arc<TileBuf>) -> Result<Self>

Wrap a whole-image buffer as a producer.

Errors

Returns PixelsError::InvalidArgument if buffer does not start at the image origin or does not match descriptor.

pub fn buffer(&self) -> &Arc<TileBuf>

The pixels backing this producer.

Trait Implementations

impl Clone for BufferSource

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BufferSource

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

Formats the value using the given formatter.

impl Producer for BufferSource

fn name(&self) -> &'static str

A short, stable name for this producer, used in diagnostics.

fn descriptor(&self) -> ImageDescriptor

The shape of the image this producer yields.

fn capability(&self) -> DecodeCapability

Whether this producer can serve arbitrary regions, or only forward ones.

fn produce(&self, region: Region, output: &mut TileMut<'_>) -> Result<()>

Fill output with the pixels of region.

fn reduced_descriptor(&self, target: (u32, u32)) -> Option<ImageDescriptor>

What this producer would emit if asked for target or larger, when it can reach that size more cheaply than by producing full resolution.

fn reduce_to(&self, descriptor: ImageDescriptor) -> Result<()>

Commit to emitting descriptor, which Producer::reduced_descriptor must have returned.