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39 lines
1.2 KiB
Markdown
39 lines
1.2 KiB
Markdown
## Name
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font - Bitmap Font File format (.font)
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## Synopsis
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Font files contain bitmap definitions of fonts (`Gfx::BitmapFont`).
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## Description
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Bitmap fonts can be either varying-width or fixed-width.
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The first four bytes of font files contain the filemagic: `!Fnt` (0x21466e74).
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In addition, `Gfx::BitmapFont` supports reading from and writing to font files (as well as reading directly from memory)
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and the question mark '?' used as a fallback for unknown glyphs or emojis.
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## Structure
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The order is big-endian.
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| Size | Member name |
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|------------|---------------------|
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| 4 bytes | Filemagic |
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| 1 byte | Glyph width |
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| 1 byte | Glyph height |
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| 2 bytes | Range mask size |
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| 1 byte | Variable width flag |
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| 1 byte | Glyph spacing |
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| 1 byte | Baseline |
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| 1 byte | Mean line |
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| 1 byte | Presentation size |
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| 2 bytes | Weight |
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| 1 byte | Slope |
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| 32 bytes | Name |
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| 32 bytes | Family |
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## See also
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- Format header definition in `Gfx::FontFileHeader` in [`Userland/Libraries/LibGfx/Font/BitmapFont.cpp`](../../../../../Userland/Libraries/LibGfx/Font/BitmapFont.cpp)
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