pub struct PngEncoder<W: Write> { /* private fields */ }
Expand description
PNG encoder
Implementations
sourceimpl<W: Write> PngEncoder<W>
impl<W: Write> PngEncoder<W>
sourcepub fn new(w: W) -> PngEncoder<W>
pub fn new(w: W) -> PngEncoder<W>
Create a new encoder that writes its output to w
sourcepub fn new_with_quality(
w: W,
compression: CompressionType,
filter: FilterType
) -> PngEncoder<W>
pub fn new_with_quality(
w: W,
compression: CompressionType,
filter: FilterType
) -> PngEncoder<W>
Create a new encoder that writes its output to w
with CompressionType
compression
and
FilterType
filter
.
It is best to view the options as a hint to the implementation on the smallest or fastest option for encoding a particular image. That is, using options that map directly to a PNG image parameter will use this parameter where possible. But variants that have no direct mapping may be interpreted differently in minor versions. The exact output is expressly not part the SemVer stability guarantee.
Note that it is not optimal to use a single filter type. It is likely that the library used will at some point gain the ability to use adaptive filtering methods per pixel row (or even interlaced row). We might make it the new default variant in which case choosing a particular filter method likely produces larger images. Be sure to check the release notes once in a while.
Trait Implementations
sourceimpl<W: Write> ImageEncoder for PngEncoder<W>
impl<W: Write> ImageEncoder for PngEncoder<W>
Auto Trait Implementations
impl<W> RefUnwindSafe for PngEncoder<W> where
W: RefUnwindSafe,
impl<W> Send for PngEncoder<W> where
W: Send,
impl<W> Sync for PngEncoder<W> where
W: Sync,
impl<W> Unpin for PngEncoder<W> where
W: Unpin,
impl<W> UnwindSafe for PngEncoder<W> where
W: UnwindSafe,
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcepub fn borrow_mut(&mut self) -> &mut T
pub fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more