Remove dotted circle for ാം rendering

This has been a recurrent issue for the users. While browser and most modern applications use recent shaping engines that remove the dotted circle, applications like libreoffice has this issue unresolved for long time. Here, remove the dotted circle if followed by aa sign and anuswara. This rule will be picked up only if shaping engines had not removed the dotted circle.
smc · Sep 29, 2023 · ed820d7 · ed820d7
1 parent a2e8306
commit ed820d7
Show file tree

Hide file tree

Showing 9 changed files with 59 additions and 0 deletions.
diff --git a/sources/Manjari-Bold.ufo/glyphs/aam.glif b/sources/Manjari-Bold.ufo/glyphs/aam.glif
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="ai1" format="2">
+	<advance width="1828"/>
+	<outline>
+		<component base="a2"/>
+		<component base="anuswara" xOffset="1000" yOffset="4"/>
+	</outline>
+	<lib>
+		<dict>
+			<key>org.fontforge.glyphclass</key>
+			<string>baseligature</string>
+		</dict>
+	</lib>
+</glyph>
diff --git a/sources/Manjari-Bold.ufo/glyphs/contents.plist b/sources/Manjari-Bold.ufo/glyphs/contents.plist
@@ -208,6 +208,8 @@
 		<string>a2.glif</string>
 		<key>aacute</key>
 		<string>aacute.glif</string>
+		<key>aam</key>
+		<string>aam.glif</string>
 		<key>acircumflex</key>
 		<string>acircumflex.glif</string>
 		<key>acute</key>

diff --git a/sources/Manjari-Regular.ufo/glyphs/aam.glif b/sources/Manjari-Regular.ufo/glyphs/aam.glif
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="ai1" format="2">
+	<advance width="1828"/>
+	<outline>
+		<component base="a2"/>
+		<component base="anuswara" xOffset="1000" yOffset="4"/>
+	</outline>
+	<lib>
+		<dict>
+			<key>org.fontforge.glyphclass</key>
+			<string>baseligature</string>
+		</dict>
+	</lib>
+</glyph>
diff --git a/sources/Manjari-Regular.ufo/glyphs/contents.plist b/sources/Manjari-Regular.ufo/glyphs/contents.plist
@@ -214,6 +214,8 @@
 		<string>a2.glif</string>
 		<key>aacute</key>
 		<string>aacute.glif</string>
+		<key>aam</key>
+		<string>aam.glif</string>
 		<key>acircumflex</key>
 		<string>acircumflex.glif</string>
 		<key>acute</key>

diff --git a/sources/Manjari-Thin.ufo/glyphs/aam.glif b/sources/Manjari-Thin.ufo/glyphs/aam.glif
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<glyph name="ai1" format="2">
+	<advance width="1828"/>
+	<outline>
+		<component base="a2"/>
+		<component base="anuswara" xOffset="1000" yOffset="4"/>
+	</outline>
+	<lib>
+		<dict>
+			<key>org.fontforge.glyphclass</key>
+			<string>baseligature</string>
+		</dict>
+	</lib>
+</glyph>
diff --git a/sources/Manjari-Thin.ufo/glyphs/contents.plist b/sources/Manjari-Thin.ufo/glyphs/contents.plist
@@ -214,6 +214,8 @@
 		<string>a2.glif</string>
 		<key>aacute</key>
 		<string>aacute.glif</string>
+		<key>aam</key>
+		<string>aam.glif</string>
 		<key>acircumflex</key>
 		<string>acircumflex.glif</string>
 		<key>acute</key>

diff --git a/sources/features/features.fea b/sources/features/features.fea
@@ -18,11 +18,13 @@ feature akhn {
       lookup chillu;
       lookup akhn_conjuncts;
       lookup akhn_conditional_stacking;
+      lookup remove_dotted_circle;
  script mlym;
      language dflt ;
       lookup chillu;
       lookup akhn_conjuncts;
       lookup akhn_conditional_stacking;
+      lookup remove_dotted_circle;
 } akhn;
 
 feature blwf {

diff --git a/sources/features/lookups-common.fea b/sources/features/lookups-common.fea
@@ -622,3 +622,7 @@ lookup psts_vowel_signs_common {
     sub rhrh u2 by rhrhu2;
 } psts_vowel_signs_common;
 
+
+lookup remove_dotted_circle {
+    sub uni25CC a2 anuswara by aam;
+} remove_dotted_circle;
diff --git a/tests/ligatures.txt b/tests/ligatures.txt
@@ -1110,3 +1110,8 @@ proident, sunt in culpa qui officia deserunt mollit anim id est laborum
 
 ന്റ ന്റു ന്റൂ
 ൻ്റ ൻ്റു ൻ്റൂ
+
+4-ാം
+ാം
+ ാം
+4ാം
-Original file line number
+Diff line change
@@ Expand Up @@
     ന്റ ന്റു ന്റൂ
     ൻ്റ ൻ്റു ൻ്റൂ
+-ാം
+    ാം
+     ാം
+ാം