Crate bc_mur 

bc-mur

Multipart UR QR code generator — single-frame and animated fountain-coded QR sequences with optional logo overlay.

This crate provides:

• Single-frame QR code rendering from raw bytes or UR strings
• Logo overlay with module-aligned compositing
• Animated multipart fountain-coded QR sequences (GIF)
• ProRes 4444 encoding via optional ffmpeg integration
• Frame dump for custom pipelines

Example

use bc_mur::{Color, CorrectionLevel, render_qr};

let img = render_qr(
    b"UR:BYTES/HDCXDWINVEZM",
    CorrectionLevel::Low,
    512,
    Color::BLACK,
    Color::WHITE,
    1,    // quiet zone modules
    None, // no logo
)
.unwrap();
let png_bytes = img.to_png().unwrap();
assert!(!png_bytes.is_empty());

Structs

AnimateParams

Parameters for multipart animated QR generation.

Color

RGBA color with 8-bit channels.

Logo

A pre-rendered logo for compositing onto QR codes.

QrFrame

A single frame of a multipart QR animation.

RenderedImage

An RGBA pixel buffer with encoding methods.

Enums

CorrectionLevel

QR error correction level.

Error

LogoClearShape

Shape used to clear the center area behind the logo.

Constants

DEFAULT_MAX_MODULES

Default maximum QR module count for reliable phone scanning. Corresponds to QR version 25 (117×117 modules).

Functions

check_qr_density

Check that a module count is within a density limit.

encode_animated_gif

Encode frames into an animated GIF.

encode_prores

Encode frames to ProRes 4444 via ffmpeg subprocess.

generate_frames

Generate all frames for a multipart UR animation.

qr_module_count

Get the QR module count for a message without rendering.

render_qr

Render a single-frame QR code from raw bytes.

render_ur_qr

Render a single-frame QR code from a UR string.

write_frame_pngs

Write frames as numbered PNG files.

Type Aliases

Result