ttfxGetPreviousTextSubString function ttf

TtfxSubString? ttfxGetPreviousTextSubString(Pointer<TtfText> text, TtfxSubString subString)

Get the previous substring in a text object

If called at the start of the text, this will return a zero length substring with the TTF_SUBSTRING_TEXT_START flag set.

\param text the TTF_Text to query. \param substring the TTF_SubString to query. \param previous a pointer filled in with the previous substring in the text object. \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 text.

\since This function is available since SDL_ttf 3.0.0.

extern SDL_DECLSPEC bool SDLCALL TTF_GetPreviousTextSubString(TTF_Text *text, const TTF_SubString *substring, TTF_SubString *previous)

Implementation

TtfxSubString? ttfxGetPreviousTextSubString(
  Pointer<TtfText> text,
  TtfxSubString subString,
) {
  TtfxSubString? result;
  final subStringPointer = subString.calloc();
  final resultPointer = ffi.calloc<TtfSubString>();
  final bl = ttfGetPreviousTextSubString(text, subStringPointer, resultPointer);
  if (bl) {
    result = TtfxSubString()..loadFromPointer(resultPointer);
  }
  subStringPointer.callocFree();
  resultPointer.callocFree();
  return result;
}