WIP - add extractor, generate snippet_data

node_modules/probe-image-size/lib/parse_stream/bmp.js

@@ -0,0 +1,36 @@
+'use strict';
+
+
+var ParserStream = require('../common').ParserStream;
+var str2arr      = require('../common').str2arr;
+var sliceEq      = require('../common').sliceEq;
+
+
+var SIG_BM = str2arr('BM');
+
+
+module.exports = function () {
+  var parser = new ParserStream();
+
+  parser._bytes(26, function (data) {
+    parser._skipBytes(Infinity);
+
+    if (!sliceEq(data, 0, SIG_BM)) {
+      parser.push(null);
+      return;
+    }
+
+    parser.push({
+      width:  data.readUInt16LE(18),
+      height: data.readUInt16LE(22),
+      type: 'bmp',
+      mime: 'image/bmp',
+      wUnits: 'px',
+      hUnits: 'px'
+    });
+
+    parser.push(null);
+  });
+
+  return parser;
+};