A text renderer for Rust's embedded-graphics crate, based on U8g2

Related tags

Command-line u8g2-fonts
Overview

u8g2-fonts

Hello World text rendered by this crate

Crates.io Crates.io License Build Status docs.rs Coverage Status

This crate is a pure Rust reimplementation of the font subsystem of U8g2.

It is intended for the embedded-graphics ecosystem.

Licensing

While this crate is MIT / Apache-2.0 licensed, note that the fonts themselves are not.

For more information about the font licenses, read the license agreement of U8g2.

Example

let font = FontRenderer::new::<fonts::u8g2_font_haxrcorp4089_t_cyrillic>();
let text = "embedded-graphics";

font.render_aligned(
    text,
    display.bounding_box().center() + Point::new(0, 16),
    VerticalPosition::Baseline,
    HorizontalAlignment::Center,
    FontColor::Transparent(BinaryColor::On),
    &mut display,
)
.unwrap();

This example is based on the hello-world of the official embedded-graphics examples.

If we replace the text rendering section of the example with the code above, it produces this output:

Embedded-graphics example with our U8g2 font

Note that the letter i sits snuck in between the h and the c, compared to the original example. This is not a monospace font.

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Comments
  • Use generate font file scripts from crate

    Use generate font file scripts from crate

    Is it possible to move the generate font file tool, such that it is usable from another rust project in order to automate the process of converting true type fonts (or anything convertible to bdf format) to this Rust representation?

    I make this request, as I were using the tool locally on my PC, but do not want to commit it into an Git project which is licensed completely different and the tool does not have any licensing information.

    opened by Rico1502 7
  • Optimize multiline args

    Optimize multiline args

    • Only compute horizontal bounding box where applicable
    • Only store necessary data in args line dimensions cache
    • Reduce cached lines to 5
    • Skip bounding box calculation of lines that won't get cached
    opened by Finomnis 0
  • Update base64 requirement from 0.13.0 to 0.20.0

    Update base64 requirement from 0.13.0 to 0.20.0

    Updates the requirements on base64 to permit the latest version.

    Changelog

    Sourced from base64's changelog.

    0.20.0

    Breaking changes

    • Update MSRV to 1.57.0
    • Decoding can now either ignore padding, require correct padding, or require no padding. The default is to require correct padding.
      • The NO_PAD config now requires that padding be absent when decoding.

    0.20.0-alpha.1

    Breaking changes

    • Extended the Config concept into the Engine abstraction, allowing the user to pick different encoding / decoding implementations.
      • What was formerly the only algorithm is now the FastPortable engine, so named because it's portable (works on any CPU) and relatively fast.
      • This opens the door to a portable constant-time implementation (#153, presumably ConstantTimePortable?) for security-sensitive applications that need side-channel resistance, and CPU-specific SIMD implementations for more speed.
      • Standard base64 per the RFC is available via DEFAULT_ENGINE. To use different alphabets or other settings (padding, etc), create your own engine instance.
    • CharacterSet is now Alphabet (per the RFC), and allows creating custom alphabets. The corresponding tables that were previously code-generated are now built dynamically.
    • Since there are already multiple breaking changes, various functions are renamed to be more consistent and discoverable.
    • MSRV is now 1.47.0 to allow various things to use const fn.
    • DecoderReader now owns its inner reader, and can expose it via into_inner(). For symmetry, EncoderWriter can do the same with its writer.
    • encoded_len is now public so you can size encode buffers precisely.

    0.13.1

    • More precise decode buffer sizing, avoiding unnecessary allocation in decode_config.

    0.13.0

    • Config methods are const
    • Added EncoderStringWriter to allow encoding directly to a String
    • EncoderWriter now owns its delegate writer rather than keeping a reference to it (though refs still work)
      • As a consequence, it is now possible to extract the delegate writer from an EncoderWriter via finish(), which returns Result<W> instead of Result<()>. If you were calling finish() explicitly, you will now need to use let _ = foo.finish() instead of just foo.finish() to avoid a warning about the unused value.
    • When decoding input that has both an invalid length and an invalid symbol as the last byte, InvalidByte will be emitted instead of InvalidLength to make the problem more obvious.

    0.12.2

    • Add BinHex alphabet

    0.12.1

    • Add Bcrypt alphabet

    0.12.0

    • A Read implementation (DecoderReader) to let users transparently decoded data from a b64 input source
    • IMAP's modified b64 alphabet
    • Relaxed type restrictions to just AsRef<[ut8]> for main encode*/decode* functions
    • A minor performance improvement in encoding

    0.11.0

    • Minimum rust version 1.34.0

    ... (truncated)

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    dependencies 
    opened by dependabot[bot] 0
Releases(0.2.0)

  • 0.2.0(Sep 7, 2022)

    Breaking Changes

    • Move text rendered with HorizontalAlignment::Left left by one pixel.
      • Rendering with HorizontalAlignment::Left is now identical to rendering with render().
      • Matches the behaviour of embedded_graphics::text.

    Changes

    • Integration with embedded_graphics::text
      • New feature embedded_graphics_textstyle that enables it
      • Adds struct U8g2TextStyle that can be used as a character style for Text
    • Add new functions:
      • FontRenderer::with_ignore_unknown_chars()
      • FontRenderer::with_line_height()
      • FontRenderer::get_default_line_height()
    • Improve multiline rendering of format_args!():
      • Reduce memory consumption
      • Improve performance
    Source code(tar.gz)
    Source code(zip)

  • 0.1.0(Aug 27, 2022)

    First official release!

    Changes

    • Remove InternalError error.
      • It shouldn't be the users problem if our fonts are broken. This error should never happen, therefore it shouldn't exist and be an assert instead.
    Source code(tar.gz)
    Source code(zip)

  • 0.1.0-alpha.1(Aug 26, 2022)

Owner
null
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