Crate color_hex

This crate provides the color_from_hex! macro for converting RGB and RGBA hexadecimal string literals to a byte array at compile time.

It accepts the following characters in the input string:

• '0'...'9', 'a'...'f', 'A'...'F' — hex characters which will be used in construction of the output byte array
• ' ', '\r', '\n', '\t' — formatting characters which will be ignored

Examples

// The macro can be used in const context
const COLOR: [u8; 3] = color_from_hex!("010203");
assert_eq!(COLOR, [1, 2, 3]);

// It understands both upper and lower hex values
assert_eq!(color_from_hex!("a1 b2 c3 d4"), [0xA1, 0xB2, 0xC3, 0xD4]);
assert_eq!(color_from_hex!("E5 E6 90 92"), [0xE5, 0xE6, 0x90, 0x92]);
assert_eq!(color_from_hex!("0a0B0C"), [10, 11, 12]);

// It can tolerate a leading '#' or none
assert_eq!(color_from_hex!("#4c4c4c"), color_from_hex!("4c4c4c"))

Macros

color_from_hex

Macro for converting a string literal containing hex-encoded color data into an array of bytes.