ofxMixedFont

Overview

ofxMixedFont is an openFrameworks addon to handle multiple fonts. It can render UNICODE characters including color emoji. Tested on macOS.

Features

• ofxMixedFont enables the user to handle multiple fonts as if they were single font
• ofxMixedFont can render UNICODE characters including color emoji (Google's CBLC+CBDT and Apple's SBIX)
• The user may overwrite typesetting function of ofxMixedFont by the use of std::function
• The user may create own font class that derived from ofxBaseFont class, and ofxMixedFont can be used with it

Installation

1. Download it ( https://github.com/hironishihara/ofxMixedFont/archive/master.zip )
2. Extract the zip file, then rename the extracted folder to ofxMixedFont
3. Put the ofxMixedFont folder in OF_ROOT/addons

Usage

1. Launch projectGenerator, then create new sketch with ofxMixedFont addon

2. Close projectGenerator, then open the new sketch project

3. Copy libfreetype.a in ofxMixedFont/libs/freetype2/lib and rename it to freetype.a, then substitute freetype.a in OF_ROOT/libs/freetype/lib/freetype.a with it

4. Put font files (ex. yourFont.ttf and emojiFont.ttf) in YOUR_PROJECT/bin/data

5. Include ofxMixedFont.hpp and ofxFT2Font.hpp

   // ofApp.h
   #include "ofxMixedFont.hpp"
   #include "ofxFT2Font.hpp"

6. Declare an instance of std::shared_ptr<ofxMixedFont> and std::shared_ptr<ofxFT2Font>

   // ofApp.h
   class ofApp : public ofBaseApp{
     ...
     std::shared_ptr<ofxMixedFont> mixedFont;
     std::shared_ptr<ofxFT2Font> yourFont, emojiFont;
   };

7. Load fonts

   // ofApp.cpp
   void ofApp::setup(){
     ...
     mixedFont = std::make_shared<ofxMixedFont>();
   
     yourFont = std::make_shared<ofxFT2Font>("your_font.ttf", 64);
     emojiFont = std::make_shared<ofxFT2Font>("emoji_font.otf", 64);
   
     mixedFont->add(yourFont);
     mixedFont->add(emojiFont);
     mixedFont->add(std::make_shared<ofxFT2Font>("barfoo_font.otf", 64));
   }

8. Draw string

   // ofApp.cpp
   void ofApp::draw(){
     ...
     mixedFont->drawString("こんにちは🙂", ofPoint(100, 100));
   }

9. Overwrite typesetting function

// ofApp.cpp
void ofApp::draw(){
  ...
  auto func = [&](const ofxBaseFontPtr &font, const ofPoint &point, ofxGlyphDataList &glyph_list) {
    ofPoint pos = point;
    for (auto &glyph : glyph_list) {
      glyph.coord = pos;

      if (glyph.props.code_point == U"\n") {
          pos.x = point.x;
          pos.y += font->getFontProps().line_height;
      }
      else if (glyph.props.code_point == U" ") {
          pos.x += font->getFontProps().x_ppem / 2.f;
      }
      else if (glyph.props.code_point == U"　") {
          pos.x += font->getFontProps().x_ppem;
      }
      else {
          pos.x += glyph.props.advance;
      }
    }
  };

  mixedFont->drawString("こんにちは🙂", ofPoint(100, 100), func);
}

Refer ofxMixedFont.hpp and ofxMixedFontUtil.hpp with regard to other functions.

Contribution

1. Fork it ( http://github.com/hironishihara/ofxMixedFont/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Rebase your local changes against the master branch
5. Make sure that your feature performs as expected
6. Make sure that your feature properly works together with functions of ofxMixedFont
7. Push to the branch (git push origin my-new-feature)
8. Create new Pull Request

System Tested

• macOS (10.12) + Xcode (8.1) + openFrameworks 0.9.4 (osx)

ToDo

• kerning function
• ligature function
• range of unicode characters
• other directions (Right to Left, Top to Bottom, etc.)

License

ofxMixedFont is distributed under the MIT License. This gives everyone the freedoms to use ofxMixedFont in any context: commercial or non-commercial, public or private, open or closed source. Please see License for details.

ofxMixedFont includes the following:

openFrameworks

Copyright (c) 2004 - openFrameworks Community
Licensed under the MIT license.

FreeType2

Copyright (c) 1996-2002, 2006 - David Turner, Robert Wilhelm, and Werner Lemberg
Licensed under the FreeType project license.

libpng

Copyright (c) 2000-2002, 2004, 2006-2016 - Guy Eric Schalnat, Andreas Dilger, John Bowler, Glenn Randers-Pehrson, and others
Licensed under the libpng license.

HarfBuzz

Copyright (c) 2010,2011,2012 Google, Inc.
Copyright (c) 2012 Mozilla Foundation
Copyright (c) 2011 Codethink Limited
Copyright (c) 2008,2010 Nokia Corporation and/or its subsidiary(-ies)
Copyright (c) 2009 Keith Stribley
Copyright (c) 2009 Martin Hosken and SIL International
Copyright (c) 2007 Chris Wilson
Copyright (c) 2006 Behdad Esfahbod
Copyright (c) 2005 David Turner
Copyright (c) 2004,2007,2008,2009,2010 Red Hat, Inc.
Copyright (c) 1998-2004 David Turner and Werner Lemberg
Licensed under the so-called "Old MIT" license.

bzip2

Copyright (c) 1996-2010 Julian R Seward
Licensed under the BSD-style license.