ttfSetFontDirection function

bool ttfSetFontDirection(
  1. Pointer<TtfFont> font,
  2. int direction
)

Set direction to be used for text shaping by a font.

Possible direction values are:

  • TTF_DIRECTION_LTR (Left to Right)
  • TTF_DIRECTION_RTL (Right to Left)
  • TTF_DIRECTION_TTB (Top to Bottom)
  • TTF_DIRECTION_BTT (Bottom to Top)

If SDL_ttf was not built with HarfBuzz support, this function returns false.

This updates any TTF_Text objects using this font.

\param font the font to specify a direction for. \param direction the new direction for text to flow. \returns true on success or false on failure; call SDL_GetError() for more information.

\threadsafety This function should be called on the thread that created the font.

\since This function is available since SDL_ttf 3.0.0.

extern SDL_DECLSPEC bool SDLCALL TTF_SetFontDirection(TTF_Font *font, TTF_Direction direction)

Implementation

bool ttfSetFontDirection(Pointer<TtfFont> font, int direction) {
  final ttfSetFontDirectionLookupFunction = libSdl3Ttf.lookupFunction<
      Uint8 Function(Pointer<TtfFont> font, Int32 direction),
      int Function(
          Pointer<TtfFont> font, int direction)>('TTF_SetFontDirection');
  return ttfSetFontDirectionLookupFunction(font, direction) == 1;
}