Struct ViewportMapping 

pub struct ViewportMapping {
    pub content_rect: Rect,
    pub target_px_size: (u32, u32),
    pub fit: ViewportFit,
}

Fields

content_rect: Rect

target_px_size: (u32, u32)

fit: ViewportFit

Implementations

impl ViewportMapping

pub fn map(self) -> ViewportMapped

pub fn target_px_per_screen_px(self) -> Option<f32>

Returns the scale from window-local logical pixels (“screen px”) to render-target pixels.

This is derived from the mapped draw rect (logical pixels) and the backing render target size self.target_px_size (physical pixels).

For ViewportFit::Contain/Cover this is uniform; for ViewportFit::Stretch the mapping is non-uniform, so this returns the smaller axis scale as a conservative approximation for isotropic thresholds (hit radii, click distances).

pub fn window_point_to_uv(self, p: Point) -> Option<(f32, f32)>

pub fn window_point_to_uv_clamped(self, p: Point) -> (f32, f32)

pub fn window_point_to_target_px(self, p: Point) -> Option<(u32, u32)>

pub fn window_point_to_target_px_clamped(self, p: Point) -> (u32, u32)

Trait Implementations

impl Clone for ViewportMapping

fn clone(&self) -> ViewportMapping

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ViewportMapping

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

Formats the value using the given formatter.

impl PartialEq for ViewportMapping

fn eq(&self, other: &ViewportMapping) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for ViewportMapping

impl StructuralPartialEq for ViewportMapping