Struct cosmic::iced_widget::renderer::graphics::image::image_rs::codecs::jpeg::JpegDecoder
source · pub struct JpegDecoder<R> { /* private fields */ }
Expand description
JPEG decoder
Implementations§
source§impl<R> JpegDecoder<R>where
R: Read,
impl<R> JpegDecoder<R>where
R: Read,
sourcepub fn new(r: R) -> Result<JpegDecoder<R>, ImageError>
pub fn new(r: R) -> Result<JpegDecoder<R>, ImageError>
Create a new decoder that decodes from the stream r
sourcepub fn scale(
&mut self,
requested_width: u16,
requested_height: u16,
) -> Result<(u16, u16), ImageError>
pub fn scale( &mut self, requested_width: u16, requested_height: u16, ) -> Result<(u16, u16), ImageError>
Configure the decoder to scale the image during decoding.
This efficiently scales the image by the smallest supported scale factor that produces an image larger than or equal to the requested size in at least one axis. The currently implemented scale factors are 1/8, 1/4, 1/2 and 1.
To generate a thumbnail of an exact size, pass the desired size and then scale to the final size using a traditional resampling algorithm.
The size of the image to be loaded, with the scale factor applied, is returned.
Trait Implementations§
source§impl<'a, R> ImageDecoder<'a> for JpegDecoder<R>where
R: 'a + Read,
impl<'a, R> ImageDecoder<'a> for JpegDecoder<R>where
R: 'a + Read,
source§fn dimensions(&self) -> (u32, u32)
fn dimensions(&self) -> (u32, u32)
Returns a tuple containing the width and height of the image
source§fn color_type(&self) -> ColorType
fn color_type(&self) -> ColorType
Returns the color type of the image data produced by this decoder
source§fn icc_profile(&mut self) -> Option<Vec<u8>>
fn icc_profile(&mut self) -> Option<Vec<u8>>
Returns the ICC color profile embedded in the image Read more
source§fn into_reader(
self,
) -> Result<<JpegDecoder<R> as ImageDecoder<'a>>::Reader, ImageError>
fn into_reader( self, ) -> Result<<JpegDecoder<R> as ImageDecoder<'a>>::Reader, ImageError>
👎Deprecated: Planned for removal. See https://github.com/image-rs/image/issues/1989
Returns a reader that can be used to obtain the bytes of the image. For the best
performance, always try to read at least
scanline_bytes
from the reader at a time. Reading
fewer bytes will cause the reader to perform internal buffering.source§fn read_image(self, buf: &mut [u8]) -> Result<(), ImageError>
fn read_image(self, buf: &mut [u8]) -> Result<(), ImageError>
Returns all the bytes in the image. Read more
source§fn original_color_type(&self) -> ExtendedColorType
fn original_color_type(&self) -> ExtendedColorType
Returns the color type of the image file before decoding
source§fn total_bytes(&self) -> u64
fn total_bytes(&self) -> u64
Returns the total number of bytes in the decoded image. Read more
source§fn scanline_bytes(&self) -> u64
fn scanline_bytes(&self) -> u64
👎Deprecated: Planned for removal. See https://github.com/image-rs/image/issues/1989
Returns the minimum number of bytes that can be efficiently read from this decoder. This may
be as few as 1 or as many as
total_bytes()
.source§fn read_image_with_progress<F>(
self,
buf: &mut [u8],
progress_callback: F,
) -> Result<(), ImageError>
fn read_image_with_progress<F>( self, buf: &mut [u8], progress_callback: F, ) -> Result<(), ImageError>
👎Deprecated: Use read_image instead. See https://github.com/image-rs/image/issues/1989
Same as
read_image
but periodically calls the provided callback to give updates on loading
progress.source§fn set_limits(&mut self, limits: Limits) -> Result<(), ImageError>
fn set_limits(&mut self, limits: Limits) -> Result<(), ImageError>
Auto Trait Implementations§
impl<R> Freeze for JpegDecoder<R>where
R: Freeze,
impl<R> RefUnwindSafe for JpegDecoder<R>where
R: RefUnwindSafe,
impl<R> Send for JpegDecoder<R>where
R: Send,
impl<R> Sync for JpegDecoder<R>where
R: Sync,
impl<R> Unpin for JpegDecoder<R>where
R: Unpin,
impl<R> UnwindSafe for JpegDecoder<R>where
R: UnwindSafe,
Blanket Implementations§
source§impl<S, D, Swp, Dwp, T> AdaptInto<D, Swp, Dwp, T> for Swhere
T: Real + Zero + Arithmetics + Clone,
Swp: WhitePoint<T>,
Dwp: WhitePoint<T>,
D: AdaptFrom<S, Swp, Dwp, T>,
impl<S, D, Swp, Dwp, T> AdaptInto<D, Swp, Dwp, T> for Swhere
T: Real + Zero + Arithmetics + Clone,
Swp: WhitePoint<T>,
Dwp: WhitePoint<T>,
D: AdaptFrom<S, Swp, Dwp, T>,
source§fn adapt_into_using<M>(self, method: M) -> Dwhere
M: TransformMatrix<T>,
fn adapt_into_using<M>(self, method: M) -> Dwhere
M: TransformMatrix<T>,
Convert the source color to the destination color using the specified
method.
source§fn adapt_into(self) -> D
fn adapt_into(self) -> D
Convert the source color to the destination color using the bradford
method by default.
source§impl<T, Res> Apply<Res> for Twhere
T: ?Sized,
impl<T, Res> Apply<Res> for Twhere
T: ?Sized,
source§impl<T, C> ArraysFrom<C> for Twhere
C: IntoArrays<T>,
impl<T, C> ArraysFrom<C> for Twhere
C: IntoArrays<T>,
source§fn arrays_from(colors: C) -> T
fn arrays_from(colors: C) -> T
Cast a collection of colors into a collection of arrays.
source§impl<T, C> ArraysInto<C> for Twhere
C: FromArrays<T>,
impl<T, C> ArraysInto<C> for Twhere
C: FromArrays<T>,
source§fn arrays_into(self) -> C
fn arrays_into(self) -> C
Cast this collection of arrays into a collection of colors.
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
source§impl<WpParam, T, U> Cam16IntoUnclamped<WpParam, T> for Uwhere
T: FromCam16Unclamped<WpParam, U>,
impl<WpParam, T, U> Cam16IntoUnclamped<WpParam, T> for Uwhere
T: FromCam16Unclamped<WpParam, U>,
source§type Scalar = <T as FromCam16Unclamped<WpParam, U>>::Scalar
type Scalar = <T as FromCam16Unclamped<WpParam, U>>::Scalar
The number type that’s used in
parameters
when converting.source§fn cam16_into_unclamped(
self,
parameters: BakedParameters<WpParam, <U as Cam16IntoUnclamped<WpParam, T>>::Scalar>,
) -> T
fn cam16_into_unclamped( self, parameters: BakedParameters<WpParam, <U as Cam16IntoUnclamped<WpParam, T>>::Scalar>, ) -> T
Converts
self
into C
, using the provided parameters.source§impl<T, C> ComponentsFrom<C> for Twhere
C: IntoComponents<T>,
impl<T, C> ComponentsFrom<C> for Twhere
C: IntoComponents<T>,
source§fn components_from(colors: C) -> T
fn components_from(colors: C) -> T
Cast a collection of colors into a collection of color components.
source§impl<T> Downcast for Twhere
T: Any,
impl<T> Downcast for Twhere
T: Any,
source§fn into_any(self: Box<T>) -> Box<dyn Any>
fn into_any(self: Box<T>) -> Box<dyn Any>
Convert
Box<dyn Trait>
(where Trait: Downcast
) to Box<dyn Any>
. Box<dyn Any>
can
then be further downcast
into Box<ConcreteType>
where ConcreteType
implements Trait
.source§fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>
fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>
Convert
Rc<Trait>
(where Trait: Downcast
) to Rc<Any>
. Rc<Any>
can then be
further downcast
into Rc<ConcreteType>
where ConcreteType
implements Trait
.source§fn as_any(&self) -> &(dyn Any + 'static)
fn as_any(&self) -> &(dyn Any + 'static)
Convert
&Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &Any
’s vtable from &Trait
’s.source§fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
Convert
&mut Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &mut Any
’s vtable from &mut Trait
’s.source§impl<T> DowncastSync for T
impl<T> DowncastSync for T
source§impl<T> FromAngle<T> for T
impl<T> FromAngle<T> for T
source§fn from_angle(angle: T) -> T
fn from_angle(angle: T) -> T
Performs a conversion from
angle
.source§impl<T, U> FromStimulus<U> for Twhere
U: IntoStimulus<T>,
impl<T, U> FromStimulus<U> for Twhere
U: IntoStimulus<T>,
source§fn from_stimulus(other: U) -> T
fn from_stimulus(other: U) -> T
Converts
other
into Self
, while performing the appropriate scaling,
rounding and clamping.source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self> ⓘ
fn instrument(self, span: Span) -> Instrumented<Self> ⓘ
source§fn in_current_span(self) -> Instrumented<Self> ⓘ
fn in_current_span(self) -> Instrumented<Self> ⓘ
source§impl<T, U> IntoAngle<U> for Twhere
U: FromAngle<T>,
impl<T, U> IntoAngle<U> for Twhere
U: FromAngle<T>,
source§fn into_angle(self) -> U
fn into_angle(self) -> U
Performs a conversion into
T
.source§impl<WpParam, T, U> IntoCam16Unclamped<WpParam, T> for Uwhere
T: Cam16FromUnclamped<WpParam, U>,
impl<WpParam, T, U> IntoCam16Unclamped<WpParam, T> for Uwhere
T: Cam16FromUnclamped<WpParam, U>,
source§type Scalar = <T as Cam16FromUnclamped<WpParam, U>>::Scalar
type Scalar = <T as Cam16FromUnclamped<WpParam, U>>::Scalar
The number type that’s used in
parameters
when converting.source§fn into_cam16_unclamped(
self,
parameters: BakedParameters<WpParam, <U as IntoCam16Unclamped<WpParam, T>>::Scalar>,
) -> T
fn into_cam16_unclamped( self, parameters: BakedParameters<WpParam, <U as IntoCam16Unclamped<WpParam, T>>::Scalar>, ) -> T
Converts
self
into C
, using the provided parameters.source§impl<T, U> IntoColor<U> for Twhere
U: FromColor<T>,
impl<T, U> IntoColor<U> for Twhere
U: FromColor<T>,
source§fn into_color(self) -> U
fn into_color(self) -> U
Convert into T with values clamped to the color defined bounds Read more
source§impl<T, U> IntoColorUnclamped<U> for Twhere
U: FromColorUnclamped<T>,
impl<T, U> IntoColorUnclamped<U> for Twhere
U: FromColorUnclamped<T>,
source§fn into_color_unclamped(self) -> U
fn into_color_unclamped(self) -> U
Convert into T. The resulting color might be invalid in its color space Read more
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ
fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ
Converts
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
Converts
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§impl<T> IntoStimulus<T> for T
impl<T> IntoStimulus<T> for T
source§fn into_stimulus(self) -> T
fn into_stimulus(self) -> T
Converts
self
into T
, while performing the appropriate scaling,
rounding and clamping.source§impl<T> Pointable for T
impl<T> Pointable for T
source§impl<T, C> TryComponentsInto<C> for Twhere
C: TryFromComponents<T>,
impl<T, C> TryComponentsInto<C> for Twhere
C: TryFromComponents<T>,
source§type Error = <C as TryFromComponents<T>>::Error
type Error = <C as TryFromComponents<T>>::Error
The error for when
try_into_colors
fails to cast.source§fn try_components_into(self) -> Result<C, <T as TryComponentsInto<C>>::Error>
fn try_components_into(self) -> Result<C, <T as TryComponentsInto<C>>::Error>
Try to cast this collection of color components into a collection of
colors. Read more
source§impl<T, U> TryIntoColor<U> for Twhere
U: TryFromColor<T>,
impl<T, U> TryIntoColor<U> for Twhere
U: TryFromColor<T>,
source§fn try_into_color(self) -> Result<U, OutOfBounds<U>>
fn try_into_color(self) -> Result<U, OutOfBounds<U>>
Convert into T, returning ok if the color is inside of its defined
range, otherwise an
OutOfBounds
error is returned which contains
the unclamped color. Read moresource§impl<C, U> UintsFrom<C> for Uwhere
C: IntoUints<U>,
impl<C, U> UintsFrom<C> for Uwhere
C: IntoUints<U>,
source§fn uints_from(colors: C) -> U
fn uints_from(colors: C) -> U
Cast a collection of colors into a collection of unsigned integers.
source§impl<C, U> UintsInto<C> for Uwhere
C: FromUints<U>,
impl<C, U> UintsInto<C> for Uwhere
C: FromUints<U>,
source§fn uints_into(self) -> C
fn uints_into(self) -> C
Cast this collection of unsigned integers into a collection of colors.