Proposal #2 to restore how UI/dialogs used to render by prioritizing fallback fonts.

With the emojis support, a new font was added, which not only provides emojis
but also fancy colorful replacements for UTF-8 characters that used to be
supported by our fallback (monochrome) fonts: this causes discrepancies and
unwanted/undesired changes in scripted objects menus (e.g. an empty circle or
square may render as a black, full one, a heart may render red instead of white),
not to mention the larger font size used by the emoji characters...

This patch restores the aspect of such menus/dialogs/UI elements with UTF-8
characters that *are* supported by the usual fallback fonts (fonts which may
also vary from one viewer to another, and from one OS to another), so that
everything keeps working/rendering as it always did so far, while not impairing
the use of new colorful emojis.

This second proposal ensures that:
- "genuine" emojis (in the 0x1f000-0x1ffff range), will *always* be rendered
  using the new emojis font (this solves, for example, the monochrome "yellow
  faces" issue seen with some characters in my first proposal).
- Special UTF-8 characters (in the 0x2000-0x32FF range) which have been used by
  scripters so far, will render as they used to, using the monochrome fallback
  fonts (this repairs scripted dialogs menus).
- Remaining special characters, that do not have a corresponding glyph in the
  monochrome font, but do have one in the emojis font, will use the latter font
  to render.

It also got the nice side-effect of removing the dependency on the ICU4C library.

Note however that the recent commit:
https://github.com/secondlife/viewer/commit/326055ba82c22fedde186c6a56bafd4fe87e613a
will need to be reverted to allow this patch to actually fix scripted dialogs.

Also, some cleanup might be needed in skins/default/xui/*/emoji_characters.xml to
remove from it the special UTF-8 characters that will no longer be rendered with
fanciful colors, but instead with the monochrome font glyphs.

1 files changed, 0 insertions, 48 deletions

diff --git a/autobuild.xml b/autobuild.xml
index de503a7d34..e2f78a3358 100644
--- a/autobuild.xml
+++ b/autobuild.xml
@@ -959,54 +959,6 @@
         <key>description</key>
         <string>Havok source code for libs and demos</string>
       </map>
-      <key>icu4c</key>
-      <map>
-        <key>canonical_repo</key>
-        <string>https://bitbucket.org/lindenlab/3p-icu4c</string>
-        <key>copyright</key>
-        <string>Copyright (c) 1995-2011 International Business Machines Corporation and others &lt;http://source.icu-project.org&gt;</string>
-        <key>description</key>
-        <string>ICU is a mature, widely used set of C/C++ and Java libraries providing Unicode and Globalization support for software applications. ICU is widely portable and gives applications the same results on all platforms and between C/C++ and Java software.</string>
-        <key>license</key>
-        <string>ICU, permissive non-copyleft free software license</string>
-        <key>license_file</key>
-        <string>LICENSES/icu.txt</string>
-        <key>name</key>
-        <string>icu4c</string>
-        <key>platforms</key>
-        <map>
-          <key>darwin64</key>
-          <map>
-            <key>archive</key>
-            <map>
-              <key>hash</key>
-              <string>47bc32b991385f1a6530e4c6179b07f64ca6edc7</string>
-              <key>hash_algorithm</key>
-              <string>sha1</string>
-              <key>url</key>
-              <string>https://github.com/secondlife/3p-icu4c/releases/download/v4.8.1-7d08d82/icu4c-4.8.1-darwin64-7d08d82.tar.zst</string>
-            </map>
-            <key>name</key>
-            <string>darwin64</string>
-          </map>
-          <key>windows64</key>
-          <map>
-            <key>archive</key>
-            <map>
-              <key>hash</key>
-              <string>b7db881dac80302e4d9010af34c0bf6ca9897df9</string>
-              <key>hash_algorithm</key>
-              <string>sha1</string>
-              <key>url</key>
-              <string>https://github.com/secondlife/3p-icu4c/releases/download/v4.8.1-7d08d82/icu4c-4.8.1-windows64-7d08d82.tar.zst</string>
-            </map>
-            <key>name</key>
-            <string>windows64</string>
-          </map>
-        </map>
-        <key>version</key>
-        <string>4.8.1-7d08d82</string>
-      </map>
       <key>jpegencoderbasic</key>
       <map>
         <key>platforms</key>