Struct TextInstance 

#[repr(C)]
pub struct TextInstance {
    pub position: [f32; 2],
    pub size: [f32; 2],
    pub atlas_uv_min: [f32; 2],
    pub atlas_uv_max: [f32; 2],
    pub color: [f32; 4],
    pub z_depth: f32,
    pub _padding: [f32; 3],
}

Instance data for text glyph rendering.

Each instance represents one glyph to be drawn from the font atlas. Text is rendered as individual glyph instances for maximum flexibility.

Coordinate System

Positions use a top-left origin coordinate system where (0, 0) is the top-left corner and Y increases downward, consistent with UI layout conventions.

Fields

position: [f32; 2]

Position in screen space (top-left corner of glyph bounding box)

size: [f32; 2]

Size of the glyph quad in screen space

atlas_uv_min: [f32; 2]

Atlas UV coordinates (top-left)

atlas_uv_max: [f32; 2]

Atlas UV coordinates (bottom-right)

color: [f32; 4]

Color (RGBA)

z_depth: f32

Depth value for z-ordering (0.0 = far, 1.0 = near)

_padding: [f32; 3]

Padding to align to 16-byte boundary (64 bytes total)

Implementations

impl TextInstance

pub fn new( position: Vec2, size: Vec2, atlas_uv_min: [f32; 2], atlas_uv_max: [f32; 2], color: Color, z_depth: f32, ) -> Self

Create a new text instance.

pub fn vertex_layout() -> VertexBufferLayout<'static>

Get the WGPU vertex buffer layout for text instances.

Trait Implementations

impl Clone for TextInstance

fn clone(&self) -> TextInstance

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TextInstance

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

Formats the value using the given formatter.

impl Zeroable for TextInstance

fn zeroed() -> Self

Calls zeroed.

impl Copy for TextInstance

impl Pod for TextInstance