opencv::gapi

Struct GMat

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pub struct GMat { /* private fields */ }
Expand description

GMat class represents image or tensor data in the graph.

GMat doesn’t store any data itself, instead it describes a functional relationship between operations consuming and producing GMat objects.

GMat is a virtual counterpart of Mat and UMat, but it doesn’t mean G-API use Mat or UMat objects internally to represent GMat objects – the internal data representation may be backend-specific or optimized out at all.

§See also

Mat, GMatDesc

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impl GMat

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pub fn default() -> Result<GMat>

Constructs an empty GMat

Normally, empty G-API data objects denote a starting point of the graph. When an empty GMat is assigned to a result of some operation, it obtains a functional link to this operation (and is not empty anymore).

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pub fn new(m: impl MatTrait) -> Result<GMat>

Constructs a value-initialized GMat

GMat may be associated with a buffer at graph construction time. It is useful when some operation has a Mat input which doesn’t change during the program execution, and is set only once. In this case, there’s no need to declare such GMat as graph input.

§Parameters
  • m: a cv::Mat buffer to associate with this GMat object.

Trait Implementations§

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impl Boxed for GMat

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unsafe fn from_raw(ptr: <GMat as OpenCVFromExtern>::ExternReceive) -> Self

Wrap the specified raw pointer Read more
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fn into_raw(self) -> <GMat as OpenCVTypeExternContainer>::ExternSendMut

Return the underlying raw pointer while consuming this wrapper. Read more
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fn as_raw(&self) -> <GMat as OpenCVTypeExternContainer>::ExternSend

Return the underlying raw pointer. Read more
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fn as_raw_mut(&mut self) -> <GMat as OpenCVTypeExternContainer>::ExternSendMut

Return the underlying mutable raw pointer Read more
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impl Clone for GMat

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fn clone(&self) -> Self

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for GMat

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

Formats the value using the given formatter. Read more
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impl Drop for GMat

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fn drop(&mut self)

Executes the destructor for this type. Read more
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impl From<GMatP> for GMat

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fn from(s: GMatP) -> Self

Converts to this type from the input type.
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impl GMatTrait for GMat

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fn as_raw_mut_GMat(&mut self) -> *mut c_void

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impl GMatTraitConst for GMat

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fn as_raw_GMat(&self) -> *const c_void

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impl Send for GMat

Auto Trait Implementations§

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impl Freeze for GMat

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impl RefUnwindSafe for GMat

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impl !Sync for GMat

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impl Unpin for GMat

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impl UnwindSafe for GMat

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<Mat> ModifyInplace for Mat
where Mat: Boxed,

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unsafe fn modify_inplace<Res>( &mut self, f: impl FnOnce(&Mat, &mut Mat) -> Res, ) -> Res

Helper function to call OpenCV functions that allow in-place modification of a Mat or another similar object. By passing a mutable reference to the Mat to this function your closure will get called with the read reference and a write references to the same Mat. This is unsafe in a general case as it leads to having non-exclusive mutable access to the internal data, but it can be useful for some performance sensitive operations. One example of an OpenCV function that allows such in-place modification is imgproc::threshold. Read more
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.