Added Noto Sans Arabic

Added a font for Arabic, making the glyphs available for rendering.

Of course, this doesn't solve Arabic text rendering yet. There is still the RTL direction to work out and possibly some missing glyph combining rules.

IssueID #195

6 files changed, 14 insertions, 2 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c942c864..75883966 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -64,6 +64,7 @@ set (EMBED_RESOURCES
     res/fonts/Literata-LightItalic-opsz=10.ttf
     res/fonts/NanumGothic-Regular.ttf
     res/fonts/NotoEmoji-Regular.ttf
+    res/fonts/NotoSansArabicUI-Regular.ttf
     res/fonts/NotoSansJP-Regular.ttf
     res/fonts/NotoSansSC-Regular.ttf
     res/fonts/Nunito-Bold.ttf
@@ -188,6 +189,7 @@ set (SOURCES
     res/about/about.gmi
     res/about/help.gmi
     res/about/lagrange.gmi
+    res/about/license.gmi
     res/about/version.gmi
     ${CMAKE_CURRENT_BINARY_DIR}/resources.lgr
     ${CMAKE_CURRENT_BINARY_DIR}/embedded.c
diff --git a/res/about/license.gmi b/res/about/license.gmi
index d5ffe3c4..8c00f5d2 100644
--- a/res/about/license.gmi
+++ b/res/about/license.gmi
@@ -104,7 +104,8 @@ This application uses fonts licensed under the Open Font License.
 => https://typeof.net/Iosevka/  Iosevka
 => https://github.com/googlefonts/literata/blob/master/OFL.txt  Literata
 => https://github.com/google/fonts/blob/master/ofl/nanumgothic/OFL.txt  Nanum Gothic
-=> https://www.google.com/get/noto/help/cjk/  Noto Sans CJK JP
+=> https://www.google.com/get/noto/#sans-arab  Noto Sans Arabic
+=> https://www.google.com/get/noto/help/cjk/  Noto Sans CJK (JP, SC)
 => https://github.com/googlefonts/nunito/blob/master/OFL.txt  Nunito
 => https://github.com/adobe-fonts/source-sans-pro/blob/release/LICENSE.md  Source Sans Pro
 
diff --git a/res/fonts/NotoSansArabic-Regular.ttf b/res/fonts/NotoSansArabic-Regular.ttf
new file mode 100644
index 00000000..94eead4c
--- /dev/null
+++ b/res/fonts/NotoSansArabic-Regular.ttf
diff --git a/res/fonts/NotoSansArabicUI-Regular.ttf b/res/fonts/NotoSansArabicUI-Regular.ttf
new file mode 100644
index 00000000..89b02b31
--- /dev/null
+++ b/res/fonts/NotoSansArabicUI-Regular.ttf
diff --git a/src/ui/text.c b/src/ui/text.c
index 6aaf40f5..b4401abb 100644
--- a/src/ui/text.c
+++ b/src/ui/text.c
@@ -331,6 +331,7 @@ static void initFonts_Text_(iText *d) {
         DEFINE_FONT_SET(fontNotoSansJPRegular_Embedded),
         DEFINE_FONT_SET(fontNotoSansSCRegular_Embedded),
         DEFINE_FONT_SET(fontNanumGothicRegular_Embedded), /* TODO: should use Noto Sans here, too */
+        DEFINE_FONT_SET(fontNotoSansArabicUIRegular_Embedded),
     };
     iForIndices(i, fontData) {
         iFont *font = &d->fonts[i];
@@ -584,6 +585,13 @@ iLocalDef iFont *characterFont_Font_(iFont *d, iChar ch, uint32_t *glyphIndex) {
             return japanese;
         }
     }
+    /* Maybe Arabic. */
+    if (ch >= 0x600) {
+        iFont *arabic = font_Text_(arabic_FontId + d->sizeId);
+        if (arabic != d && (*glyphIndex = glyphIndex_Font_(arabic, ch)) != 0) {
+            return arabic;
+        }
+    }
 #if defined (iPlatformApple)
     /* White up arrow is used for the Shift key on macOS. Symbola's glyph is not a great
        match to the other text, so use the UI font instead. */
diff --git a/src/ui/text.h b/src/ui/text.h
index d86754cc..58941974 100644
--- a/src/ui/text.h
+++ b/src/ui/text.h
@@ -75,7 +75,8 @@ enum iFontId {
     japanese_FontId          = emoji_FontId + max_FontSize,
     chineseSimplified_FontId = japanese_FontId + max_FontSize,
     korean_FontId            = chineseSimplified_FontId + max_FontSize,
-    max_FontId               = korean_FontId + max_FontSize,
+    arabic_FontId            = korean_FontId + max_FontSize,
+    max_FontId               = arabic_FontId + max_FontSize,
 
     /* Meta: */
     mask_FontId               = 0xffff,