Features Overview

Features Overview

Aspose.Font FOSS for Python is a pure-Python toolkit for programmatic font processing. It covers the full lifecycle from loading a font file to exporting a modified or subsetted version, with no OS-level font library dependencies.

Font Loading

FontLoader accepts file paths and raw bytes. It auto-detects TTF, OTF, CFF, WOFF, WOFF2, EOT, and Type 1 formats. Use FontLoader.open() for paths and FontLoader.load() for byte arrays.

from aspose_font.loader import FontLoader

font = FontLoader.open("Roboto-Regular.ttf")

Font Metadata Access

Font base class exposes font_name, font_family, font_style, num_glyphs, encoding, glyph_accessor, and metrics.

Glyph Access and Outline Paths

GlyphAccessor provides get_glyph_by_id(), get_glyph_by_unicode(), and get_glyphs_for_text(). Each Glyph object has a path of typed commands: MoveTo, LineTo, QuadraticTo, CurveTo, ClosePath.

Font Conversion

FontConverter.convert() converts between all supported formats. CurveAdapter adapts Bézier path types between quadratic and cubic.

Font Subsetting

FontSubsetter supports subset_by_text(), subset_by_gids(), subset_for_web(), subset_by_presets(), and coverage analysis via analyze_coverage() and analyze_web_coverage().

Web Font Optimization

FontCleaner.clean_for_web() strips DSIG, FFTM, and meta tables and removes Mac platform name records.

Variable Font Previews

AnimationPreviewBuilder generates animated APNG files for axis sweeps (build_axis_sweep()) and multi-step animation paths (build_path()). Results are AnimationAsset objects that write to disk via write_to().

Compatibility Checking

CompatibilityChecker.compare_fonts() and compare_variable_instances() check glyph outline compatibility between two font versions.

Format Support