First Commit

2020-11-20 18:43:59 +01:00
commit adaec81731
11 changed files with 1499 additions and 0 deletions
--- a/qr/qr.js
+++ b/qr/qr.js
@ -0,0 +1,121 @@
+"use strict";
+
+var Readable = require('stream').Readable;
+
+var QR = require('./qr-base').QR;
+var png = require('./png');
+var vector = require('./vector');
+
+var fn_noop = function() {};
+
+var BITMAP_OPTIONS = {
+    parse_url: false,
+    ec_level: 'M',
+    size: 5,
+    margin: 4,
+    customize: null
+};
+
+var VECTOR_OPTIONS = {
+    parse_url: false,
+    ec_level: 'M',
+    margin: 1,
+    size: 0
+};
+
+function get_options(options, force_type) {
+    if (typeof options === 'string') {
+        options = { 'ec_level': options }
+    } else {
+        options = options || {};
+    }
+    var _options = {
+        type: String(force_type || options.type || 'png').toLowerCase()
+    };
+
+    var defaults = _options.type == 'png' ? BITMAP_OPTIONS : VECTOR_OPTIONS;
+
+    for (var k in defaults) {
+        _options[k] = k in options ? options[k] : defaults[k];
+    }
+
+    return _options;
+}
+
+function qr_image(text, options) {
+    options = get_options(options);
+
+    var matrix = QR(text, options.ec_level, options.parse_url);
+    var stream = new Readable();
+    stream._read = fn_noop;
+
+    switch (options.type) {
+    case 'svg':
+    case 'pdf':
+    case 'eps':
+        process.nextTick(function() {
+            vector[options.type](matrix, stream, options.margin, options.size);
+        });
+        break;
+    case 'svgpath':
+        // deprecated, use svg_object method
+        process.nextTick(function() {
+            var obj = vector.svg_object(matrix, options.margin, options.size);
+            stream.push(obj.path);
+            stream.push(null);
+        });
+        break;
+    case 'png':
+    default:
+        process.nextTick(function() {
+            var bitmap = png.bitmap(matrix, options.size, options.margin);
+            if (options.customize) {
+                options.customize(bitmap);
+            }
+            png.png(bitmap, stream);
+        });
+    }
+
+    return stream;
+}
+
+function qr_image_sync(text, options) {
+    options = get_options(options);
+
+    var matrix = QR(text, options.ec_level, options.parse_url);
+    var stream = [];
+    var result;
+
+    switch (options.type) {
+    case 'svg':
+    case 'pdf':
+    case 'eps':
+        vector[options.type](matrix, stream, options.margin, options.size);
+        result = stream.filter(Boolean).join('');
+        break;
+    case 'png':
+    default:
+        var bitmap = png.bitmap(matrix, options.size, options.margin);
+        if (options.customize) {
+            options.customize(bitmap);
+        }
+        png.png(bitmap, stream);
+        result = Buffer.concat(stream.filter(Boolean));
+    }
+
+    return result;
+}
+
+function svg_object(text, options) {
+    options = get_options(options, 'svg');
+
+    var matrix = QR(text, options.ec_level);
+    return vector.svg_object(matrix, options.margin);
+}
+
+module.exports = {
+    matrix: QR,
+    image: qr_image,
+    imageSync: qr_image_sync,
+    svgObject: svg_object
+};