Function UniscribeItemizeString

src/os/windows/string_uniscribe.cpp:248–275

}

static std::vector<SCRIPT_ITEM> UniscribeItemizeString(UniscribeParagraphLayoutFactory::CharType *buff, int32_t length)
{
	/* Itemize text. */
	SCRIPT_CONTROL control{};
	control.uDefaultLanguage = _current_language->winlangid;

	SCRIPT_STATE state{};
	state.uBidiLevel = _current_text_dir == TD_RTL ? 1 : 0;

	std::vector<SCRIPT_ITEM> items(16);
	while (true) {
		/* We subtract one from max_items to work around a buffer overflow on some older versions of Windows. */
		int generated = 0;
		HRESULT hr = ScriptItemize(buff, length, (int)items.size() - 1, &control, &state, &items[0], &generated);

		if (SUCCEEDED(hr)) {
			/* Resize the item buffer. Note that Uniscribe will always add an additional end sentinel item. */
			items.resize(generated + 1);
			break;
		}
		/* Some kind of error except item buffer too small. */
		if (hr != E_OUTOFMEMORY) return std::vector<SCRIPT_ITEM>();

		items.resize(items.size() * 2);
	}

	return items;
}

/* static */ std::unique_ptr<ParagraphLayouter> UniscribeParagraphLayoutFactory::GetParagraphLayout(CharType *buff, CharType *buff_end, FontMap &font_mapping)
{