GIMP Image Format

import magic
# Libmagic effortlessly identifies GIMP XCF files via the 'gimp xcf' signature
print(magic.from_file('project.xcf', mime=True)) # Outputs 'image/x-xcf'

const fs = require('fs');
// Manually checking the first 8 bytes for the 'gimp xcf' magic header
const buffer = Buffer.alloc(8);
const fd = fs.openSync('project.xcf', 'r');
fs.readSync(fd, buffer, 0, 8, 0);
fs.closeSync(fd);
const isXCF = buffer.toString('ascii', 0, 8) === 'gimp xcf';
console.log('Is GIMP XCF Project:', isXCF);

import (
    "bytes"
    "net/http"
)
// Native Go HTTP detection reads the prefix.
// isXCF := bytes.HasPrefix(buf, []byte("gimp xcf"))

$mime = mime_content_type('project.xcf');
echo $mime; // Standard PHP setups with updated magic database definitions will return 'image/x-xcf'