stbtt_GetFontVMetrics function

  1. @Native<Void Function(Pointer<stbtt_fontinfo>, Pointer<Int>, Pointer<Int>, Pointer<Int>)>(ffi.Pointer<stbtt_fontinfo>, ffi.Pointer<ffi.Int>, ffi.Pointer<ffi.Int>, ffi.Pointer<ffi.Int>)>()
void stbtt_GetFontVMetrics(
  1. Pointer<stbtt_fontinfo> info,
  2. Pointer<Int> ascent,
  3. Pointer<Int> descent,
  4. Pointer<Int> lineGap,
)

computes a scale factor to produce a font whose EM size is mapped to 'pixels' tall. This is probably what traditional APIs compute, but I'm not positive.

Implementation

@ffi.Native<
  ffi.Void Function(
    ffi.Pointer<stbtt_fontinfo>,
    ffi.Pointer<ffi.Int>,
    ffi.Pointer<ffi.Int>,
    ffi.Pointer<ffi.Int>,
  )
>()
external void stbtt_GetFontVMetrics(
  ffi.Pointer<stbtt_fontinfo> info,
  ffi.Pointer<ffi.Int> ascent,
  ffi.Pointer<ffi.Int> descent,
  ffi.Pointer<ffi.Int> lineGap,
);