Add support for Korean.

imgui.h

@@ -1214,6 +1214,7 @@ struct ImFontAtlas
     // Helpers to retrieve list of common Unicode ranges (2 value per range, values are inclusive, zero-terminated list)
     // (Those functions could be static but aren't so most users don't have to refer to the ImFontAtlas:: name ever if in their code; just using io.Fonts->)
     IMGUI_API const ImWchar*    GetGlyphRangesDefault();    // Basic Latin, Extended Latin
+    IMGUI_API const ImWchar*    GetGlyphRangesKorean();     // Default + Korean characters
     IMGUI_API const ImWchar*    GetGlyphRangesJapanese();   // Default + Hiragana, Katakana, Half-Width, Selection of 1946 Ideographs
     IMGUI_API const ImWchar*    GetGlyphRangesChinese();    // Japanese + full set of about 21000 CJK Unified Ideographs
     IMGUI_API const ImWchar*    GetGlyphRangesCyrillic();   // Default + about 400 Cyrillic characters

imgui_draw.cpp

@@ -1434,6 +1434,18 @@ const ImWchar*   ImFontAtlas::GetGlyphRangesDefault()
     return &ranges[0];
 }
 
+const ImWchar*  ImFontAtlas::GetGlyphRangesKorean()
+{
+    static const ImWchar ranges[] =
+    {
+        0x0020, 0x00FF, // Basic Latin + Latin Supplement
+        0x3131, 0x3163, // Korean alphabets
+        0xAC00, 0xD79D, // Korean characters
+        0,
+    };
+    return &ranges[0];
+}
+
 const ImWchar*  ImFontAtlas::GetGlyphRangesChinese()
 {
     static const ImWchar ranges[] =