Struct MsdfAtlas 

pub struct MsdfAtlas {
    pub width: u32,
    pub height: u32,
    pub texture: Vec<u8>,
    pub uv_map: HashMap<u16, UvRect>,
}

A packed atlas of MSDF glyph tiles, ready for GPU upload.

The atlas texture is stored as an RGB byte slice (texture), three bytes per pixel. Each pixel encodes signed distances in the R, G, and B channels for the corresponding colored edge of the glyph outline.

Fields

width: u32

Atlas width in pixels.

height: u32

Atlas height in pixels.

texture: Vec<u8>

Raw RGB texture data: width * height * 3 bytes.

uv_map: HashMap<u16, UvRect>

UV coordinates for each glyph ID within the atlas.

Implementations

impl MsdfAtlas

pub fn pack(tiles: &[MsdfTile], atlas_size: u32) -> Self

Pack a set of MSDF tiles into a fixed-size atlas texture.

Uses the same left-to-right shelf-packing algorithm as SdfAtlas, adapted for 3-bytes-per-pixel (RGB) tiles.

If tiles is empty, returns a minimal 1×1 atlas.

pub fn export_png(&self, path: &Path) -> Result<(), SdfError>

Export the atlas texture as a PNG file for visualization.

The texture is stored as RGB (3 bytes per pixel). Each channel encodes a signed distance for the corresponding colored edge of the glyph outline.

impl MsdfAtlas

pub fn to_gpu_descriptor(&self) -> GpuAtlasDescriptor

Produce a GPU-ready descriptor for this MSDF atlas.

Returns GpuAtlasFormat::Rgb8Unorm (3 bytes per pixel) with the raw RGB texture data. glyph_metrics is empty for the same reason as for SdfAtlas::to_gpu_descriptor.