Struct MaskRaster 

pub struct MaskRaster {
    pub data: Vec<u8>,
    pub width: u32,
    pub height: u32,
    pub origin_x: i32,
    pub origin_y: i32,
    pub scale_x: f32,
    pub scale_y: f32,
}

A pre-rasterized soft mask, cached on the display-list SoftMasked element so the renderer can build it once at gs-time CTM and sample it per content pixel without re-rasterizing for every band.

The renderer holds the mask raster in its own device-space pixel coordinate system (anchored at (origin_x, origin_y)) rather than the SoftMasked.params.bbox viewport, because the mask form’s internal cm operators may translate the actual paint elements outside the form’s /BBox after the gs-time CTM is applied. Sampling per content pixel by device coordinates decouples the mask and content coordinate systems entirely.

Fields

data: Vec<u8>

Single-channel mask values (luminosity or alpha), row-major.

width: u32

Width of the raster in pixels.

height: u32

Height of the raster in pixels.

origin_x: i32

Top-left corner of the raster in device-space pixels at scale.

origin_y: i32

Top-left corner of the raster in device-space pixels at scale.

scale_x: f32

Horizontal scale at which the raster was built. The CLI egui viewer and the WASM viewport both re-render the same captured display list at varying zoom scales, so the cache must invalidate when this changes.

scale_y: f32

Vertical scale at which the raster was built.

Trait Implementations

impl Clone for MaskRaster

fn clone(&self) -> MaskRaster

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MaskRaster

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

Formats the value using the given formatter.