Struct Viewport

pub struct Viewport<'a, T> {
    pub x: f32,
    pub y: f32,
    pub mvp: Option<&'a [f32; 16]>,
    pub output: T,
    pub size: Size<u32>,
}

The rendering output of a filter chain.

Viewport coordinates are relative to the coordinate system of the target runtime. For correct results, x and y should almost always be 0, and size should be the same as the size of the output texture.

Size uniforms will always be passed the full size of the output texture, regardless of the user-specified viewport size.

Fields

x: f32

The x offset to start rendering from. For correct results, this should almost always be 0 to indicate the origin.

y: f32

The y offset to begin rendering from.

mvp: Option<&'a [f32; 16]>

An optional pointer to an MVP to use when rendering to the viewport.

output: T

The output handle to render the final image to.

size: Size<u32>

The extent of the viewport size starting from the origin defined by x and y.

Implementations

impl<'a, T: GetSize<u32>> Viewport<'a, T>

pub fn new_render_target_sized_origin( output: T, mvp: Option<&'a [f32; 16]>, ) -> Result<Viewport<'a, T>, T::Error>

Create a new viewport from an output that can be sized.

This will create a viewport that spans the entire output texture, which will give correct results in the general case.