2016-05-02 14:04:45 +00:00
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Creating bitmap fonts for GAL
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=============================
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Maciej Suminski <maciej.suminski@cern.ch>
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12.04.2016
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To create a new bitmap font atlas for Graphics Abstraction Layer, follow these steps:
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* Download Bitmap Font Generator [1] (runs well under wine)
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* Load default configuration stored in font.bmfc
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* Adjust settings as needed
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* Be sure that all glyphs fit into one page (you can check if in 'Visualize' you can move to another page (menu View))
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* Export font atlas as .PNG file, and font description as XML file
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* Run ./fnt2struct.py bitmap_font.fnt
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* Run ./png2struct.py bitmap_font_0.png
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* Copy bitmap_font_desc.c to common/gal/opengl/bitmap_font_desc.c
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* Copy bitmap_font_0.png to common/gal/opengl/bitmap_font_img.c
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Recommended export options:
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2016-05-02 14:14:26 +00:00
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Texture size: 1024x1024 or 2048x2048 (should be supported by majority GPUs)
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2016-05-02 14:04:45 +00:00
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Bit depth: 8
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Font descriptor: XML
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Textures: png
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2016-05-02 14:14:26 +00:00
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Layout spacing: 2 (both horizontal and vertical)
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2016-05-02 14:04:45 +00:00
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To match as closely as possible the newstroke_font glyph set,
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mark the following character subsets in Bitmap Font Generator right panel:
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Latin + Latin Supplement
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Latin Extended A
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Latin Extended B
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IPA Extensions
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Greek and Coptic
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Cyrillic
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Latin Extended Additional
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Greek Extended
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General Punctuation
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Subscripts and Superscripts
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Currency Symbols
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Number Forms
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Mathematical Operators
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Geometric Shapes
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References:
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1. http://www.angelcode.com/products/bmfont/
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