https://github.com/julienr/libfont

A small library to render text in OpenGL/OpenGL ES using freetype.
https://github.com/julienr/libfont

Last synced: 8 days ago
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A small library to render text in OpenGL/OpenGL ES using freetype.

• Host: GitHub
• URL: https://github.com/julienr/libfont
• Owner: julienr
• License: other
• Created: 2011-02-08T16:32:34.000Z (almost 14 years ago)
• Default Branch: master
• Last Pushed: 2011-03-08T18:05:50.000Z (over 13 years ago)
• Last Synced: 2024-07-31T22:56:18.758Z (3 months ago)
• Language: C
• Homepage:
• Size: 231 KB
• Stars: 62
• Watchers: 8
• Forks: 11
• Open Issues: 1
• Metadata Files:
  • Readme: README.rst
  • License: LICENSE

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README

        
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libfont

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This library aims to provide an easy way to render text on Android OpenGL ES (or any other OpenGL/ES capable device).

Usage

=====

The *samples/* directory contains sample code.

It currently has sample for SDL and Android.

Android

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Note that the sample uses NDK's Native Activity. Therefore, it requires a device (or the emulator) running Android 2.3. 

But the code can be ported to work with the standard Java/JNI glue that was required for earlier android versions

This is how the android demo should look :

.. image:: http://fhtagn.net/images/libfont/android-screen.png

Internals

=========

A font is loaded from a .ttf file using freetype and a font atlas (one big texture containing all the font glyphs) is created. The font altas creation is a one-time initialization process.

When a string is rendered, the font atlas texture is bound and tex coords are used to render each glyph. This mean that once the font atlas for a particular font is loaded, rendering of arbitrary string is quite fast (at least _way_ faster than using freetype to render to texture and then use the texture to draw the text).

LICENSE

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The code is under a BSD license, see the LICENSE file.

The font provided with the sample comes from the "Liberation font" project[1]. It is licensed under the GPLv2 license with some exceptions (see FONT-LICENSE.txt)

[1] https://fedorahosted.org/liberation-fonts/