# [−][src]Struct piston_window::Viewport

Stores viewport information.

## Fields

`rect: [i32; 4]`

Viewport in pixels.
`[x, y, width height]`

where `(x, y)`

is lower left corner.

`draw_size: [u32; 2]`

The size of frame buffer in pixels.

`window_size: [f64; 2]`

The size of window in points.

## Methods

`impl Viewport`

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`pub fn abs_transform<T>(&self) -> [[T; 3]; 2] where`

T: Float,

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T: Float,

Computes absolute transform for 2D graphics, which uses a row major 2x3 matrix. The origin is in the upper left corner of the viewport rectangle. The x axis points to the right, and the y axis points down. The units are in points (window coordinates).

It is assumed that the underlying coordinate system is normalized
with the origin in the center, such that `(-1.0, 1.0)`

in the
underlying coordinate system corresponds to the
upper left corner of the viewport.

## Trait Implementations

`impl Copy for Viewport`

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`impl PartialEq<Viewport> for Viewport`

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`impl Debug for Viewport`

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`impl Clone for Viewport`

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## Auto Trait Implementations

## Blanket Implementations

`impl<T> From for T`

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`impl<T, U> Into for T where`

U: From<T>,

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U: From<T>,

`impl<T> ToOwned for T where`

T: Clone,

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T: Clone,

`impl<T, U> TryFrom for T where`

U: Into<T>,

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U: Into<T>,

`type Error = !`

`try_from`

)The type returned in the event of a conversion error.

`fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>`

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`impl<T> Borrow for T where`

T: ?Sized,

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T: ?Sized,

`impl<T> Any for T where`

T: 'static + ?Sized,

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T: 'static + ?Sized,

`impl<T> BorrowMut for T where`

T: ?Sized,

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T: ?Sized,

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

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`impl<T, U> TryInto for T where`

U: TryFrom<T>,

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U: TryFrom<T>,

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

`try_from`

)The type returned in the event of a conversion error.

`fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>`

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`impl<T> SetParameter for T`

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`fn set<T>(&mut self, value: T) -> <T as Parameter<Self>>::Result where`

T: Parameter<Self>,

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T: Parameter<Self>,

Sets `value`

as a parameter of `self`

.