Crate glifo 

Glifo provides APIs for efficiently rendering glyphs and paint styles like underline.

Goals

Glifo is under rapid development. Consider it experimental for now. Its goals are to:

• Provide an API surface that accepts glyphs and their positions and renders them to a surface.
• Cache those glyphs so that repeated renders of a glyph are fast.
• Support rendering paint styles like underline, strikethrough, and brush color.
• Share expensive structs and data between the shaper and renderer like the hinting instance and hinted advance.

Features

• std (enabled by default): Get floating point functions from the standard library (likely using your target’s libc).
• libm: Use floating point implementations from libm.
• png: Enables PNG support for drawing bitmap glyphs.

At least one of std and libm is required.

Re-exports

pub use atlas::AtlasCommand;

pub use atlas::AtlasCommandRecorder;

pub use atlas::AtlasPaint;

pub use atlas::AtlasSlot;

pub use atlas::GLYPH_PADDING;

pub use atlas::GlyphAtlas;

pub use atlas::GlyphCacheConfig;

pub use atlas::GlyphCacheKey;

pub use atlas::PendingClearRect;

pub use atlas::RasterMetrics;

Modules

atlas

Glyph bitmap atlas cache for efficient text rendering.

renderer

Shared glyph rendering logic for rendering backends.

Structs

AtlasConfig

Configuration for multiple atlas support.

FontEmbolden

Synthetic embolden settings for a glyph run.

Glyph

Positioned glyph.

GlyphCaches

Caches used for glyph rendering.

GlyphColr

A glyph defined by a COLR glyph description.

GlyphPrepCache

Caches used for preparing glyph drawing.

GlyphPrepCacheMut

Mutably borrowed caches used for preparing glyph drawing.

GlyphRun

A sequence of glyphs with shared rendering properties.

GlyphRunBuilder

A builder for configuring and drawing glyphs.

GlyphRunRenderer

Helper struct for rendering a prepared glyph run.

HintCache

LRU cache for hinting instances.

HintKey

Hint key for hinting instances.

ImageCache

Manages image resources for the renderer.

OutlineCache

Caches glyph outlines for reuse. Heavily inspired by vello_encoding::glyph_cache.

Enums

AtlasCacher

Determines whether atlas-backed glyph caching is available for a draw.

Traits

DrawSink

A sink for low-level glyph drawing commands.

GlyphRenderer

A stateful renderer that can draw sequences of cached and uncached glyphs.

GlyphRunBackend

A backend for glyph run builders.

Type Aliases

NormalizedCoord

A normalized variation coordinate (for variable fonts) in 2.14 fixed point format.