Scala Native bindings for FreeType, a freely available software library to render fonts.

Add the dependency to your build.sbt:

libraryDependencies += "io.github.edadma" %%% "freetype" % "0.0.3"

You also need FreeType installed on your system:

# Ubuntu/Debian
sudo apt install libfreetype-dev

# macOS
brew install freetype

import io.github.edadma.freetype.*

// Initialize FreeType library
val library = initFreeType.getOrElse(sys.error("Failed to init FreeType"))

// Load a font face
val face = library.newFace("/path/to/font.ttf", 0).getOrElse(sys.error("Failed to load font"))

// Set pixel size
face.setPixelSizes(0, 24)

// Get kerning between two characters (requires setPixelSizes first)
val kern = face.getKerning('A', 'V')  // Returns scaled value in pixels

// Or get unscaled kerning in font design units
val kernUnscaled = face.getKerning('A', 'V', KerningMode.UNSCALED)

// Load and render a glyph
face.loadChar('A'.toLong, 0)
face.renderGlyph(RenderMode.NORMAL)

// Access bitmap data
val bmp = face.bitmap
println(s"${bmp.width} x ${bmp.rows}")

// Cleanup
face.doneFace
library.doneFreeType

• initFreeType: Either[Int, Library] - Initialize FreeType
• Library.doneFreeType: Int - Cleanup
• Library.newFace(path: String, faceIndex: Long): Either[Int, Face] - Load a font

• Face.setPixelSizes(width: Int, height: Int): Int - Set pixel size
• Face.loadChar(charCode: Long, loadFlags: Int): Int - Load a glyph
• Face.renderGlyph(mode: RenderMode): Int - Render loaded glyph
• Face.bitmap: Bitmap - Access rendered bitmap
• Face.getCharIndex(charcode: Long): Int - Get glyph index for character
• Face.getKerning(left: Char, right: Char, mode: KerningMode): Double - Get kerning

• RenderMode: NORMAL, LIGHT, MONO, LCD, LCD_V, SDF, MAX
• KerningMode: DEFAULT (scaled, grid-fitted), UNFITTED (scaled), UNSCALED (font units)

ISC