Typescript Refactor & v1

.gitignore

@@ -1 +1,7 @@
 node_modules
+**/.DS_Store
+**/*.js
+**/*.d.ts
+
+!qr.d.ts
+!rollup.config.js

Readme.md → README.md

@@ -4,14 +4,16 @@ This is a very simple QR-Code generator that outputs a PNG-Buffer. It's written
 
 ## Usage
 
-    var qr=require('qrpng');
-    qr('this is a sample code', function(err, png) {
-      // png contains the PNG as a buffer. You can write it to a file for example.
-    });
+```
+    import qrcode from 'qrpng;
+
+    const uint8array = qrcode('my text for the code');
+    document.getElementById('qrimg').src = 'image/png;base64,' + btoa(String.fromCharCode.apply(null, uint8array));
+```
 
 It has only one function:
 
-    function qr(content[, scale], callback)
+    function generate(content[, scale])
 
 scale is the pixel extent of a QR-Code data pixel.
 

lib/crc32.ts

@@ -0,0 +1,279 @@
+const CRC_TABLE = new Int32Array([
+  0x00000000,
+  0x77073096,
+  0xee0e612c,
+  0x990951ba,
+  0x076dc419,
+  0x706af48f,
+  0xe963a535,
+  0x9e6495a3,
+  0x0edb8832,
+  0x79dcb8a4,
+  0xe0d5e91e,
+  0x97d2d988,
+  0x09b64c2b,
+  0x7eb17cbd,
+  0xe7b82d07,
+  0x90bf1d91,
+  0x1db71064,
+  0x6ab020f2,
+  0xf3b97148,
+  0x84be41de,
+  0x1adad47d,
+  0x6ddde4eb,
+  0xf4d4b551,
+  0x83d385c7,
+  0x136c9856,
+  0x646ba8c0,
+  0xfd62f97a,
+  0x8a65c9ec,
+  0x14015c4f,
+  0x63066cd9,
+  0xfa0f3d63,
+  0x8d080df5,
+  0x3b6e20c8,
+  0x4c69105e,
+  0xd56041e4,
+  0xa2677172,
+  0x3c03e4d1,
+  0x4b04d447,
+  0xd20d85fd,
+  0xa50ab56b,
+  0x35b5a8fa,
+  0x42b2986c,
+  0xdbbbc9d6,
+  0xacbcf940,
+  0x32d86ce3,
+  0x45df5c75,
+  0xdcd60dcf,
+  0xabd13d59,
+  0x26d930ac,
+  0x51de003a,
+  0xc8d75180,
+  0xbfd06116,
+  0x21b4f4b5,
+  0x56b3c423,
+  0xcfba9599,
+  0xb8bda50f,
+  0x2802b89e,
+  0x5f058808,
+  0xc60cd9b2,
+  0xb10be924,
+  0x2f6f7c87,
+  0x58684c11,
+  0xc1611dab,
+  0xb6662d3d,
+  0x76dc4190,
+  0x01db7106,
+  0x98d220bc,
+  0xefd5102a,
+  0x71b18589,
+  0x06b6b51f,
+  0x9fbfe4a5,
+  0xe8b8d433,
+  0x7807c9a2,
+  0x0f00f934,
+  0x9609a88e,
+  0xe10e9818,
+  0x7f6a0dbb,
+  0x086d3d2d,
+  0x91646c97,
+  0xe6635c01,
+  0x6b6b51f4,
+  0x1c6c6162,
+  0x856530d8,
+  0xf262004e,
+  0x6c0695ed,
+  0x1b01a57b,
+  0x8208f4c1,
+  0xf50fc457,
+  0x65b0d9c6,
+  0x12b7e950,
+  0x8bbeb8ea,
+  0xfcb9887c,
+  0x62dd1ddf,
+  0x15da2d49,
+  0x8cd37cf3,
+  0xfbd44c65,
+  0x4db26158,
+  0x3ab551ce,
+  0xa3bc0074,
+  0xd4bb30e2,
+  0x4adfa541,
+  0x3dd895d7,
+  0xa4d1c46d,
+  0xd3d6f4fb,
+  0x4369e96a,
+  0x346ed9fc,
+  0xad678846,
+  0xda60b8d0,
+  0x44042d73,
+  0x33031de5,
+  0xaa0a4c5f,
+  0xdd0d7cc9,
+  0x5005713c,
+  0x270241aa,
+  0xbe0b1010,
+  0xc90c2086,
+  0x5768b525,
+  0x206f85b3,
+  0xb966d409,
+  0xce61e49f,
+  0x5edef90e,
+  0x29d9c998,
+  0xb0d09822,
+  0xc7d7a8b4,
+  0x59b33d17,
+  0x2eb40d81,
+  0xb7bd5c3b,
+  0xc0ba6cad,
+  0xedb88320,
+  0x9abfb3b6,
+  0x03b6e20c,
+  0x74b1d29a,
+  0xead54739,
+  0x9dd277af,
+  0x04db2615,
+  0x73dc1683,
+  0xe3630b12,
+  0x94643b84,
+  0x0d6d6a3e,
+  0x7a6a5aa8,
+  0xe40ecf0b,
+  0x9309ff9d,
+  0x0a00ae27,
+  0x7d079eb1,
+  0xf00f9344,
+  0x8708a3d2,
+  0x1e01f268,
+  0x6906c2fe,
+  0xf762575d,
+  0x806567cb,
+  0x196c3671,
+  0x6e6b06e7,
+  0xfed41b76,
+  0x89d32be0,
+  0x10da7a5a,
+  0x67dd4acc,
+  0xf9b9df6f,
+  0x8ebeeff9,
+  0x17b7be43,
+  0x60b08ed5,
+  0xd6d6a3e8,
+  0xa1d1937e,
+  0x38d8c2c4,
+  0x4fdff252,
+  0xd1bb67f1,
+  0xa6bc5767,
+  0x3fb506dd,
+  0x48b2364b,
+  0xd80d2bda,
+  0xaf0a1b4c,
+  0x36034af6,
+  0x41047a60,
+  0xdf60efc3,
+  0xa867df55,
+  0x316e8eef,
+  0x4669be79,
+  0xcb61b38c,
+  0xbc66831a,
+  0x256fd2a0,
+  0x5268e236,
+  0xcc0c7795,
+  0xbb0b4703,
+  0x220216b9,
+  0x5505262f,
+  0xc5ba3bbe,
+  0xb2bd0b28,
+  0x2bb45a92,
+  0x5cb36a04,
+  0xc2d7ffa7,
+  0xb5d0cf31,
+  0x2cd99e8b,
+  0x5bdeae1d,
+  0x9b64c2b0,
+  0xec63f226,
+  0x756aa39c,
+  0x026d930a,
+  0x9c0906a9,
+  0xeb0e363f,
+  0x72076785,
+  0x05005713,
+  0x95bf4a82,
+  0xe2b87a14,
+  0x7bb12bae,
+  0x0cb61b38,
+  0x92d28e9b,
+  0xe5d5be0d,
+  0x7cdcefb7,
+  0x0bdbdf21,
+  0x86d3d2d4,
+  0xf1d4e242,
+  0x68ddb3f8,
+  0x1fda836e,
+  0x81be16cd,
+  0xf6b9265b,
+  0x6fb077e1,
+  0x18b74777,
+  0x88085ae6,
+  0xff0f6a70,
+  0x66063bca,
+  0x11010b5c,
+  0x8f659eff,
+  0xf862ae69,
+  0x616bffd3,
+  0x166ccf45,
+  0xa00ae278,
+  0xd70dd2ee,
+  0x4e048354,
+  0x3903b3c2,
+  0xa7672661,
+  0xd06016f7,
+  0x4969474d,
+  0x3e6e77db,
+  0xaed16a4a,
+  0xd9d65adc,
+  0x40df0b66,
+  0x37d83bf0,
+  0xa9bcae53,
+  0xdebb9ec5,
+  0x47b2cf7f,
+  0x30b5ffe9,
+  0xbdbdf21c,
+  0xcabac28a,
+  0x53b39330,
+  0x24b4a3a6,
+  0xbad03605,
+  0xcdd70693,
+  0x54de5729,
+  0x23d967bf,
+  0xb3667a2e,
+  0xc4614ab8,
+  0x5d681b02,
+  0x2a6f2b94,
+  0xb40bbe37,
+  0xc30c8ea1,
+  0x5a05df1b,
+  0x2d02ef8d,
+]);
+
+export type TypedArray = Uint8Array | Uint16Array | Uint32Array | Int8Array | Int16Array | Int32Array;
+
+export function signed(data: TypedArray) {
+  if (!ArrayBuffer.isView(data)) throw new Error("invalid view");
+  const bytes = new Uint8Array(data.buffer, data.byteOffset, data.byteLength);
+  let crc = -1;
+  for (let byte of bytes.values()) {
+    crc = CRC_TABLE[(crc ^ byte) & 0xff] ^ (crc >>> 8);
+  }
+  return crc ^ -1;
+}
+
+export function unsigned(data: TypedArray) {
+  return signed(data) >>> 0;
+}
+
+export function bytearray(data: TypedArray) {
+  const result = new Int32Array([signed(data)]);
+  return new Uint8Array(result.buffer, result.byteOffset, result.byteLength);
+}