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<blockquote data-quote="morpheus_xx" data-source="post: 1106747" data-attributes="member: 48495">I made many tests today, based on proper arranging of character order for rendering. This gives the same result as when we render the glyphs in different order, so I sort the string like it has to be rendered.My latest algorithm is the shortes and most efficient yet, but still lacks minor details (see red marked places) in screenshot.[CODE=C#]&nbsp; &nbsp; public static string ReverseRTLCharsForRendering(string text)&nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; StringBuilder sb = new StringBuilder(text.Length);&nbsp; &nbsp; &nbsp; int caretPosition = 0;&nbsp; &nbsp; &nbsp; for (int index = 0; index &lt; text.Length; index++)&nbsp; &nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; var codepoint = char.ConvertToUtf32(text, index);&nbsp; &nbsp; &nbsp; &nbsp; bool isRTL = _characterTable.IsRandALCat(codepoint);&nbsp; &nbsp; &nbsp; &nbsp; char c = text[index];&nbsp; &nbsp; &nbsp; &nbsp; sb.Insert(caretPosition, c);&nbsp; &nbsp; &nbsp; &nbsp; if (!isRTL &amp;&amp; !IsWhiteSpaceFollowedByRTL(text, index))&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; caretPosition++;&nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; return sb.ToString();&nbsp; &nbsp; }&nbsp; &nbsp; static bool IsWhiteSpaceFollowedByRTL(string text, int index)&nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; for (int i = index; i &lt; text.Length; i++)&nbsp; &nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; var codepoint = char.ConvertToUtf32(text, i);&nbsp; &nbsp; &nbsp; &nbsp; char c = text[i];&nbsp; &nbsp; &nbsp; &nbsp; if (char.IsWhiteSpace(c))&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; continue;&nbsp; &nbsp; &nbsp; &nbsp; return _characterTable.IsRandALCat(codepoint);&nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; return false;&nbsp; &nbsp; }[/CODE]In summary, single direction texts are rendering properly,&nbsp; but mixed direction have small issues at start or end (and around whitespaces). But anyway a good progress.For completeness, this is the check if the selected culture is RTL:[CODE=C#]bool cultureIsRTL = ServiceRegistration.Get&lt;ILocalization&gt;().CurrentCulture.TextInfo.IsRightToLeft;[/CODE][ATTACH=full]156831[/ATTACH]</blockquote>

[QUOTE="morpheus_xx, post: 1106747, member: 48495"] I made many tests today, based on proper arranging of character order for rendering. This gives the same result as when we render the glyphs in different order, so I sort the string like it has to be rendered. My latest algorithm is the shortes and most efficient yet, but still lacks minor details (see red marked places) in screenshot. [CODE=C#] public static string ReverseRTLCharsForRendering(string text) { StringBuilder sb = new StringBuilder(text.Length); int caretPosition = 0; for (int index = 0; index < text.Length; index++) { var codepoint = char.ConvertToUtf32(text, index); bool isRTL = _characterTable.IsRandALCat(codepoint); char c = text[index]; sb.Insert(caretPosition, c); if (!isRTL && !IsWhiteSpaceFollowedByRTL(text, index)) caretPosition++; } return sb.ToString(); } static bool IsWhiteSpaceFollowedByRTL(string text, int index) { for (int i = index; i < text.Length; i++) { var codepoint = char.ConvertToUtf32(text, i); char c = text[i]; if (char.IsWhiteSpace(c)) continue; return _characterTable.IsRandALCat(codepoint); } return false; }[/CODE] In summary, single direction texts are rendering properly, but mixed direction have small issues at start or end (and around whitespaces). But anyway a good progress. For completeness, this is the check if the selected culture is RTL: [CODE=C#]bool cultureIsRTL = ServiceRegistration.Get<ILocalization>().CurrentCulture.TextInfo.IsRightToLeft;[/CODE] [ATTACH=full]156831[/ATTACH] [/QUOTE]

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