pub struct GuillotineAllocator {
    bins: [Bin; 3],
}
Expand description

A texture allocator using the guillotine algorithm.

See sections 2.2 and 2.2.5 in “A Thousand Ways to Pack the Bin - A Practical Approach to Two- Dimensional Rectangle Bin Packing”:

http://clb.demon.fi/files/RectangleBinPack.pdf

This approach was chosen because of its simplicity and good performance.

Note: the allocations are spread across multiple textures, and also are binned orthogonally in order to speed up the search.

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§bins: [Bin; 3]

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impl GuillotineAllocator

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pub fn new(initial_size: Option<DeviceIntSize>) -> Self

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fn push(&mut self, slice: FreeRectSlice, rect: DeviceIntRect)

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fn find_index_of_best_rect( &self, requested_dimensions: &DeviceIntSize ) -> Option<(FreeListBin, FreeListIndex)>

Find a suitable rect in the free list. We choose the first fit.

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fn split_guillotine( &mut self, chosen: &FreeRect, requested_dimensions: &DeviceIntSize )

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pub fn allocate( &mut self, requested_dimensions: &DeviceIntSize ) -> Option<(FreeRectSlice, DeviceIntPoint)>

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pub fn extend( &mut self, slice: FreeRectSlice, total_size: DeviceIntSize, requested_dimensions: DeviceIntSize )

Add a new slice to the allocator, and immediately allocate a rect from it.

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impl Serialize for GuillotineAllocator

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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>where __S: Serializer,

Serialize this value into the given Serde serializer. Read more

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impl<T> Any for Twhere 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 Twhere 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 Twhere 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> 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 Twhere 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<T> IntoEither for T

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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 more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>where F: FnOnce(&Self) -> bool,

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 more
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impl<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T, U> TryFrom<U> for Twhere 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 Twhere 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.