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github: SheetJSDev
custom: https://sheetjs.com
open_collective: s5s

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fonts/
node_modules/
*.[wWeE][mM][fF]
*.[pP][nN][gG]

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Apache License
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.PHONY: all
all: node browser
.PHONY: src/index.ts
js/index.js: src/index.ts
#tsc src/index.ts
tsc
node: js/index.js
webpack-cli --config misc/webpack.node.config.js
browser: js/index.js
webpack-cli --config misc/webpack.browser.config.js
.PHONY: dist prod
dist prod: js/index.js
webpack-cli --mode=production --config misc/webpack.node.config.js
webpack-cli --mode=production --config misc/webpack.browser.config.js

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# js-wmf
Processor for Windows MetaFile (WMF) files in JS (for the browser and nodejs).
## Installation
With [npm](https://www.npmjs.org/package/wmf):
```bash
$ npm install wmf
```
In the browser:
```html
<script src="wmf.js"></script>
```
The browser exposes a variable `WMF`.
## Usage
The `data` argument is expected to be an `ArrayBuffer`, `Uint8Array` or `Buffer`
- `WMF.image_size(data)` extracts the image offset and extents, returns an Array
`[width, height]` where both metrics are measured in pixels.
- `WMF.draw_canvas(data, canvas)` parses the WMF and draws to a `Canvas`.
### Notes
- The library assumes the global `ImageData` is available. For nodejs-powered
canvas implementations, a shim must be exposed as a global. Using the `canvas`
npm package:
```js
const { createImageData } = require("canvas");
global.ImageData = createImageData;
```
- `OffscreenCanvas` in Chrome and some other Canvas implementations require
the dimensions in the constructor:
```js
const size = WMF.image_size(data);
const canvas = new OffscreenCanvas(size[0], size[1]);
```
## Examples
<details>
<summary><b>Browser Fetch into canvas</b> (click to show)</summary>
```js
// assume `canvas` is a DOM element
(async() => {
const res = await fetch("url/for/image.wmf");
const ab = await res.arrayBuffer();
WMF.draw_canvas(ab, document.getElementById("canvas"));
})();
```
</details>
<details>
<summary><b>NodeJS (using `canvas` npm module)</b> (click to show)</summary>
```js
const { createCanvas, createImageData } = require("canvas");
global.ImageData = createImageData;
const size = WMF.image_size(data);
const canvas = createCanvas(size[0], size[1]);
WMF.draw_canvas(data, canvas);
```
</details>
## License
Please consult the attached LICENSE file for details. All rights not explicitly
granted by the Apache 2.0 License are reserved by the Original Author.
## References
- [MS-WMF]: Windows Metafile Format

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<!DOCTYPE html>
<!-- wmf.js (C) 2020-present SheetJS http://sheetjs.com -->
<!-- vim: set ts=2: -->
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>wmf.js Live Demo</title>
<style>
#drop{
border:2px dashed #bbb;
-moz-border-radius:5px;
-webkit-border-radius:5px;
border-radius:5px;
padding:25px;
text-align:center;
font:20pt bold,"Vollkorn";color:#bbb
}
#b64data{
width:100%;
}
a { text-decoration: none }
</style>
</head>
<body>
<pre>
<b><a href="http://sheetjs.com">SheetJS wmf.js Preview Live Demo</a></b>
<a href="https://github.com/SheetJS/js-wmf">Source Code Repo</a>
<a href="https://github.com/SheetJS/js-wmf/issues">Issues? Something look weird? Click here and report an issue</a>
<div id="drop">Drop a WMF File here to Preview data</div>
<input type="file" name="xlfile" id="xlf" /> ... or click here to select a file
<pre id="out"></pre>
<canvas id="htmlout"></canvas>
<br />
<script src="dist/wmf.js"></script>
<script>
/*jshint browser:true */
/* eslint-env browser */
/*global Uint8Array, console */
/*global WMF */
/* exported b64it, setfmt */
/* eslint no-use-before-define:0 */
var HTMLOUT = document.getElementById('htmlout');
var do_file = function do_file(files) {
var f = files[0];
var reader = new FileReader();
reader.onload = function(e) {
var data = e.target.result;
WMF.draw_canvas(data, HTMLOUT);
};
reader.readAsArrayBuffer(f);
};
(function() {
var drop = document.getElementById('drop');
if(!drop.addEventListener) return;
function handleDrop(e) {
e.stopPropagation();
e.preventDefault();
do_file(e.dataTransfer.files);
}
function handleDragover(e) {
e.stopPropagation();
e.preventDefault();
e.dataTransfer.dropEffect = 'copy';
}
drop.addEventListener('dragenter', handleDragover, false);
drop.addEventListener('dragover', handleDragover, false);
drop.addEventListener('drop', handleDrop, false);
})();
(function() {
var xlf = document.getElementById('xlf');
if(!xlf.addEventListener) return;
function handleFile(e) { do_file(e.target.files); }
xlf.addEventListener('change', handleFile, false);
})();
var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-36810333-1']);
_gaq.push(['_trackPageview']);
(function() {
var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
})();
</script>
</body>
</html>

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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
/* 2.1.1.1 RecordType Enumeration */
exports.WMFRecords = {
0x0000: { n: "META_EOF" },
0x0626: { n: "META_ESCAPE" },
0x0940: { n: "META_DIBBITBLT" },
0x0B41: { n: "META_DIBSTRETCHBLT" },
0x0A32: { n: "META_EXTTEXTOUT" },
0x0325: { n: "META_POLYLINE" },
0x0324: { n: "META_POLYGON" },
0x0538: { n: "META_POLYPOLYGON" },
0x02FC: { n: "META_CREATEBRUSHINDIRECT" },
0x02FB: { n: "META_CREATEFONTINDIRECT" },
0x02FA: { n: "META_CREATEPENINDIRECT" },
0x01F0: { n: "META_DELETEOBJECT" },
0x012C: { n: "META_SELECTCLIPREGION" },
0x012D: { n: "META_SELECTOBJECT" },
0x0416: { n: "META_INTERSECTCLIPRECT" },
0x0035: { n: "META_REALIZEPALETTE" },
0x0127: { n: "META_RESTOREDC" },
0x001E: { n: "META_SAVEDC" },
0x0102: { n: "META_SETBKMODE" },
0x0103: { n: "META_SETMAPMODE" },
0x0037: { n: "META_SETPALENTRIES" },
0x0106: { n: "META_SETPOLYFILLMODE" },
0x0107: { n: "META_SETSTRETCHBLTMODE" },
0x012E: { n: "META_SETTEXTALIGN" },
0x0209: { n: "META_SETTEXTCOLOR" },
0x020C: { n: "META_SETWINDOWEXT" },
0x020B: { n: "META_SETWINDOWORG" },
0xFFFF: { n: "META_SHEETJS" }
};
exports.WMFEscapes = {
0x000F: { n: "META_ESCAPE_ENHANCED_METAFILE" }
};
//# sourceMappingURL=Records.js.map

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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
/*! wmf.js (C) 2020-present SheetJS LLC -- https://sheetjs.com */
var util_1 = require("./util");
var wmf_1 = require("./wmf");
exports.css_color = function (clr) { return "#" + (clr & 0xFF).toString(16).padStart(2, "0") + ((clr >> 8) & 0xFF).toString(16).padStart(2, "0") + ((clr >> 16) & 0xFF).toString(16).padStart(2, "0"); };
exports.set_ctx_state = function (ctx, state) {
if (!state)
return;
var font = "";
if (state.Font) {
if (state.Font.Italic)
font += " italic";
if (state.Font.Weight)
font += " " + (state.Font.Weight == 700 ? "bold" : state.Font.Weight == 400 ? "" : state.Font.Weight);
if (state.Font.Height < 0)
font += " " + -state.Font.Height + "px";
else if (state.Font.Height > 0)
font += " " + state.Font.Height + "px";
var name_1 = state.Font.Name || "";
if (name_1 == "System")
name_1 = "Calibri"; // TODO: default sys font is Segoe UI
if (name_1)
font += " '" + name_1 + "', sans-serif";
ctx.font = font.trim();
}
};
// TODO: DIB BIT ORDER?
exports.render_actions_to_context = function (out, ctx) {
out.forEach(function (act) {
ctx.save();
exports.set_ctx_state(ctx, act.s);
switch (act.t) {
case "poly":
ctx.beginPath();
ctx.moveTo(act.p[0][0], act.p[0][1]);
act.p.slice(1).forEach(function (_a) {
var x = _a[0], y = _a[1];
ctx.lineTo(x, y);
});
if (act.g)
ctx.closePath();
ctx.stroke();
break;
case "text":
if (act.s && act.s.TextColor)
ctx.fillStyle = exports.css_color(act.s.TextColor);
if (act.s.Font.Angle != 0) {
ctx.translate(act.p[0], act.p[1]);
ctx.rotate(-act.s.Font.Angle * Math.PI / 180);
ctx.fillText(act.v, 0, 0);
ctx.translate(-act.p[0], -act.p[1]);
}
else
ctx.fillText(act.v, act.p[0], act.p[1]);
break;
case "cpy":
{
// TODO: base on ROP
var idata = ctx.getImageData(act.src[0][0], act.src[1][0], act.src[0][1], act.src[1][1]);
ctx.putImageData(idata, act.dst[0], act.dst[1]);
}
break;
case "str": {
if (act.data && act.data.BitCount == 24 && act.data.ImageData) {
var _o = new Uint8ClampedArray(act.data.Width * act.data.Height * 4);
for (var i = 0; i < act.data.Width * act.data.Height; ++i) {
var j = (i % act.data.Width) + act.data.Width * (act.data.Height - 1 - Math.floor(i / act.data.Width));
_o[4 * i] = act.data.ImageData[3 * j + 2];
_o[4 * i + 1] = act.data.ImageData[3 * j + 1];
_o[4 * i + 2] = act.data.ImageData[3 * j];
_o[4 * i + 3] = 255;
}
var idata = new ImageData(_o, act.data.Width, act.data.Height);
ctx.putImageData(idata, act.dst[0][0], act.dst[1][0]);
}
// TODO: ROP et al
}
}
ctx.restore();
});
};
exports.render_canvas = function (out, image) {
var ctx;
/* find first action with window info */
out.forEach(function (act) {
if (ctx)
return;
if (!act.s)
return;
if (!act.s.Extent || !act.s.Origin)
return;
image.width = act.s.Extent[0] - act.s.Origin[0];
image.height = act.s.Extent[1] - act.s.Origin[1];
ctx = image.getContext('2d');
ctx.save();
ctx.fillStyle = 'rgb(255,255,255)';
ctx.fillRect(0, 0, act.s.Extent[0] - act.s.Origin[0], act.s.Extent[1] - act.s.Origin[1]);
ctx.restore();
});
if (!ctx)
ctx = image.getContext('2d');
exports.render_actions_to_context(out, ctx);
};
exports.draw_canvas = function (data, image) {
if (data instanceof ArrayBuffer)
return exports.draw_canvas(new Uint8Array(data), image);
util_1.prep_blob(data, 0);
var out = wmf_1.get_actions_prepped_bytes(data);
return exports.render_canvas(out, image);
};
//# sourceMappingURL=canvas.js.map

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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
/*! wmf.js (C) 2020-present SheetJS LLC -- https://sheetjs.com */
var util_1 = require("./util");
var wmf_1 = require("./wmf");
var canvas_1 = require("./canvas");
exports.draw_canvas = canvas_1.draw_canvas;
exports.render_canvas = canvas_1.render_canvas;
exports.get_actions = function (data) {
if (data instanceof ArrayBuffer)
return exports.get_actions(new Uint8Array(data));
util_1.prep_blob(data, 0);
return wmf_1.get_actions_prepped_bytes(data);
};
exports.image_size = function (data) {
if (data instanceof ArrayBuffer)
return exports.image_size(new Uint8Array(data));
util_1.prep_blob(data, 0);
return wmf_1.image_size_prepped_bytes(data);
};
//# sourceMappingURL=index.js.map

1
js/index.js.map Normal file

@ -0,0 +1 @@
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395
js/util.js Normal file

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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
// ---
var has_buf = !!(typeof Buffer !== 'undefined' && typeof process !== 'undefined' && typeof process.versions !== 'undefined' && process.versions.node);
exports.has_buf = has_buf;
var Buffer_from;
exports.Buffer_from = Buffer_from;
if (typeof Buffer !== 'undefined') {
var nbfs = !Buffer.from;
if (!nbfs)
try {
Buffer.from("foo", "utf8");
}
catch (e) {
nbfs = true;
}
exports.Buffer_from = Buffer_from = nbfs ? (function (buf, enc) { return (enc) ? new Buffer(buf, enc) : new Buffer(buf); }) : Buffer.from.bind(Buffer);
if (!Buffer.alloc)
Buffer.alloc = function (n) { return new Buffer(n); };
if (!Buffer.allocUnsafe)
Buffer.allocUnsafe = function (n) { return new Buffer(n); };
}
exports.new_raw_buf = function (len) { return has_buf ? Buffer.alloc(len) : new Array(len); };
exports.new_unsafe_buf = function (len) { return has_buf ? Buffer.allocUnsafe(len) : new Array(len); };
exports._chr = function (c) { return String.fromCharCode(c); };
exports.chr0 = /\u0000/g; // eslint-disable-line no-control-regex
exports.chr1 = /[\u0001-\u0006]/g; // eslint-disable-line no-control-regex
// ---
var read_double_le = function (b, idx) {
var s = 1 - 2 * (b[idx + 7] >>> 7);
var e = ((b[idx + 7] & 0x7f) << 4) + ((b[idx + 6] >>> 4) & 0x0f);
var m = (b[idx + 6] & 0x0f);
for (var i = 5; i >= 0; --i)
m = m * 256 + b[idx + i];
if (e == 0x7ff)
return m == 0 ? (s * Infinity) : NaN;
if (e == 0)
e = -1022;
else {
e -= 1023;
m += Math.pow(2, 52);
}
return s * Math.pow(2, e - 52) * m;
};
var write_double_le = function (b, v, idx) {
var bs = ((((v < 0) || (1 / v == -Infinity)) ? 1 : 0) << 7);
var e = 0, m = 0;
var av = bs ? (-v) : v;
if (!isFinite(av)) {
e = 0x7ff;
m = isNaN(v) ? 0x6969 : 0;
}
else if (av == 0)
e = m = 0;
else {
e = Math.floor(Math.log(av) / Math.LN2);
m = av * Math.pow(2, 52 - e);
if ((e <= -1023) && (!isFinite(m) || (m < Math.pow(2, 52)))) {
e = -1022;
}
else {
m -= Math.pow(2, 52);
e += 1023;
}
}
for (var i = 0; i <= 5; ++i, m /= 256)
b[idx + i] = m & 0xff;
b[idx + 6] = ((e & 0x0f) << 4) | (m & 0xf);
b[idx + 7] = (e >> 4) | bs;
};
var __toBuffer = function (bufs /*:Array<Array<RawBytes> >*/) {
var x = [];
for (var i = 0; i < bufs[0].length; ++i)
if (bufs[0][i])
for (var j = 0, L = bufs[0][i].length; j < L; j += 10240)
x.push.apply(x, bufs[0][i].slice(j, j + 10240));
return x;
};
var ___toBuffer = __toBuffer;
var __readUInt8 = function (b, idx) { return b[idx]; };
var __readUInt16LE = function (b, idx) { return (b[idx + 1] * (1 << 8)) + b[idx]; };
var __readInt16LE = function (b, idx) { var u = (b[idx + 1] * (1 << 8)) + b[idx]; return (u < 0x8000) ? u : ((0xffff - u + 1) * -1); };
var __readUInt32LE = function (b, idx) { return b[idx + 3] * (1 << 24) + (b[idx + 2] << 16) + (b[idx + 1] << 8) + b[idx]; };
var __readInt32LE = function (b, idx) { return (b[idx + 3] << 24) | (b[idx + 2] << 16) | (b[idx + 1] << 8) | b[idx]; };
var __readInt32BE = function (b, idx) { return (b[idx] << 24) | (b[idx + 1] << 16) | (b[idx + 2] << 8) | b[idx + 3]; };
var __utf16le = function (b, s, e) {
var ss = [];
for (var i = s; i < e; i += 2)
ss.push(String.fromCharCode(__readUInt16LE(b, i)));
return ss.join("").replace(exports.chr0, '');
};
exports.__utf16le = __utf16le;
var ___utf16le = __utf16le;
var __hexlify = function (b /*:RawBytes|CFBlob*/, s, l) { var ss = []; for (var i = s; i < s + l; ++i)
ss.push(("0" + b[i].toString(16)).slice(-2)); return ss.join(""); };
var ___hexlify = __hexlify;
var __utf8 = function (b /*:RawBytes|CFBlob*/, s, e) { var ss = []; for (var i = s; i < e; i++)
ss.push(String.fromCharCode(__readUInt8(b, i))); return ss.join(""); };
var ___utf8 = __utf8;
var __lpstr = function (b /*:RawBytes|CFBlob*/, i) { var len = __readUInt32LE(b, i); return len > 0 ? __utf8(b, i + 4, i + 4 + len - 1) : ""; };
var ___lpstr = __lpstr;
var __cpstr = function (b /*:RawBytes|CFBlob*/, i) { var len = __readUInt32LE(b, i); return len > 0 ? __utf8(b, i + 4, i + 4 + len - 1) : ""; };
var ___cpstr = __cpstr;
var __lpwstr = function (b /*:RawBytes|CFBlob*/, i) { var len = 2 * __readUInt32LE(b, i); return len > 0 ? __utf8(b, i + 4, i + 4 + len - 1) : ""; };
var ___lpwstr = __lpwstr;
var __lpp4, ___lpp4;
__lpp4 = ___lpp4 = function lpp4_(b /*:RawBytes|CFBlob*/, i) { var len = __readUInt32LE(b, i); return len > 0 ? __utf16le(b, i + 4, i + 4 + len) : ""; };
var ___8lpp4 = function (b /*:RawBytes|CFBlob*/, i) { var len = __readUInt32LE(b, i); return len > 0 ? __utf8(b, i + 4, i + 4 + len) : ""; };
var __8lpp4 = ___8lpp4;
var ___double = function (b /*:RawBytes|CFBlob*/, idx) { return read_double_le(b, idx); };
var __double = ___double;
if (has_buf) {
exports.__utf16le = __utf16le = function (b /*:RawBytes|CFBlob*/, s, e) { return (!Buffer.isBuffer(b)) ? ___utf16le(b, s, e) : b.toString('utf16le', s, e).replace(exports.chr0, ''); };
__hexlify = function (b /*:RawBytes|CFBlob*/, s, l) { return Buffer.isBuffer(b) ? b.toString('hex', s, s + l) : ___hexlify(b, s, l); };
__lpstr = function (b /*:RawBytes|CFBlob*/, i) { if (!Buffer.isBuffer(b))
return ___lpstr(b, i); var len = b.readUInt32LE(i); return len > 0 ? b.toString('utf8', i + 4, i + 4 + len - 1) : ""; };
__cpstr = function (b /*:RawBytes|CFBlob*/, i) { if (!Buffer.isBuffer(b))
return ___cpstr(b, i); var len = b.readUInt32LE(i); return len > 0 ? b.toString('utf8', i + 4, i + 4 + len - 1) : ""; };
__lpwstr = function (b /*:RawBytes|CFBlob*/, i) { if (!Buffer.isBuffer(b))
return ___lpwstr(b, i); var len = 2 * b.readUInt32LE(i); return b.toString('utf16le', i + 4, i + 4 + len - 1); };
__lpp4 = function (b /*:RawBytes|CFBlob*/, i) { if (!Buffer.isBuffer(b))
return ___lpp4(b, i); var len = b.readUInt32LE(i); return b.toString('utf16le', i + 4, i + 4 + len); };
__8lpp4 = function (b /*:RawBytes|CFBlob*/, i) { if (!Buffer.isBuffer(b))
return ___8lpp4(b, i); var len = b.readUInt32LE(i); return b.toString('utf8', i + 4, i + 4 + len); };
__utf8 = function (b /*:RawBytes|CFBlob*/, s, e) { return (Buffer.isBuffer(b)) ? b.toString('utf8', s, e) : ___utf8(b, s, e); };
__toBuffer = function (bufs) { return (bufs[0].length > 0 && Buffer.isBuffer(bufs[0][0])) ? Buffer.concat(bufs[0]) : ___toBuffer(bufs); };
__double = function (b /*:RawBytes|CFBlob*/, i) { return (Buffer.isBuffer(b)) ? b.readDoubleLE(i) : ___double(b, i); };
}
function ReadShift(size, t) {
var o = "", oI = 0, oR, w, vv, i, loc;
var oo = [];
switch (t) {
case 'dbcs':
loc = this.l;
if (has_buf && Buffer.isBuffer(this))
o = this.slice(this.l, this.l + 2 * size).toString("utf16le");
else
for (i = 0; i < size; ++i) {
o += String.fromCharCode(__readUInt16LE(this, loc));
loc += 2;
}
size *= 2;
break;
case 'utf8':
o = __utf8(this, this.l, this.l + size);
break;
case 'utf16le':
size *= 2;
o = __utf16le(this, this.l, this.l + size);
break;
case 'wstr':
return ReadShift.call(this, size, 'dbcs');
/* [MS-OLEDS] 2.1.4 LengthPrefixedAnsiString */
case 'lpstr-ansi':
o = __lpstr(this, this.l);
size = 4 + __readUInt32LE(this, this.l);
break;
case 'lpstr-cp':
o = __cpstr(this, this.l);
size = 4 + __readUInt32LE(this, this.l);
break;
/* [MS-OLEDS] 2.1.5 LengthPrefixedUnicodeString */
case 'lpwstr':
o = __lpwstr(this, this.l);
size = 4 + 2 * __readUInt32LE(this, this.l);
break;
/* [MS-OFFCRYPTO] 2.1.2 Length-Prefixed Padded Unicode String (UNICODE-LP-P4) */
case 'lpp4':
size = 4 + __readUInt32LE(this, this.l);
o = __lpp4(this, this.l);
if (size & 0x02)
size += 2;
break;
/* [MS-OFFCRYPTO] 2.1.3 Length-Prefixed UTF-8 String (UTF-8-LP-P4) */
case '8lpp4':
size = 4 + __readUInt32LE(this, this.l);
o = __8lpp4(this, this.l);
if (size & 0x03)
size += 4 - (size & 0x03);
break;
case 'cstr':
size = 0;
o = "";
while ((w = __readUInt8(this, this.l + size++)) !== 0)
oo.push(String.fromCharCode(w));
o = oo.join("");
break;
case '_wstr':
size = 0;
o = "";
while ((w = __readUInt16LE(this, this.l + size)) !== 0) {
oo.push(String.fromCharCode(w));
size += 2;
}
size += 2;
o = oo.join("");
break;
/* sbcs and dbcs support continue records in the SST way TODO codepages */
case 'dbcs-cont':
o = "";
loc = this.l;
for (i = 0; i < size; ++i) {
if (this.lens && this.lens.indexOf(loc) !== -1) {
w = __readUInt8(this, loc);
this.l = loc + 1;
vv = ReadShift.call(this, size - i, w ? 'dbcs-cont' : 'sbcs-cont');
return oo.join("") + vv;
}
oo.push(String.fromCharCode(__readUInt16LE(this, loc)));
loc += 2;
}
o = oo.join("");
size *= 2;
break;
case 'cpstr':
/* falls through */
case 'sbcs-cont':
o = "";
loc = this.l;
for (i = 0; i != size; ++i) {
if (this.lens && this.lens.indexOf(loc) !== -1) {
w = __readUInt8(this, loc);
this.l = loc + 1;
vv = ReadShift.call(this, size - i, w ? 'dbcs-cont' : 'sbcs-cont');
return oo.join("") + vv;
}
oo.push(String.fromCharCode(__readUInt8(this, loc)));
loc += 1;
}
o = oo.join("");
break;
default:
switch (size) {
case 1:
oI = __readUInt8(this, this.l);
this.l++;
return oI;
case 2:
oI = (t === 'i' ? __readInt16LE : __readUInt16LE)(this, this.l);
this.l += 2;
return oI;
case 4:
case -4:
if (t === 'i' || ((this[this.l + 3] & 0x80) === 0)) {
oI = ((size > 0) ? __readInt32LE : __readInt32BE)(this, this.l);
this.l += 4;
return oI;
}
else {
oR = __readUInt32LE(this, this.l);
this.l += 4;
}
return oR;
case 8:
case -8:
if (t === 'f') {
if (size == 8)
oR = __double(this, this.l);
else
oR = __double([this[this.l + 7], this[this.l + 6], this[this.l + 5], this[this.l + 4], this[this.l + 3], this[this.l + 2], this[this.l + 1], this[this.l + 0]], 0);
this.l += 8;
return oR;
}
else
size = 8;
/* falls through */
case 16:
o = __hexlify(this, this.l, size);
break;
}
}
this.l += size;
return o;
}
exports.ReadShift = ReadShift;
var __writeUInt32LE = function (b /*:RawBytes|CFBlob*/, val, idx) { b[idx] = (val & 0xFF); b[idx + 1] = ((val >>> 8) & 0xFF); b[idx + 2] = ((val >>> 16) & 0xFF); b[idx + 3] = ((val >>> 24) & 0xFF); };
var __writeInt32LE = function (b /*:RawBytes|CFBlob*/, val, idx) { b[idx] = (val & 0xFF); b[idx + 1] = ((val >> 8) & 0xFF); b[idx + 2] = ((val >> 16) & 0xFF); b[idx + 3] = ((val >> 24) & 0xFF); };
var __writeUInt16LE = function (b /*:RawBytes|CFBlob*/, val, idx) { b[idx] = (val & 0xFF); b[idx + 1] = ((val >>> 8) & 0xFF); };
function WriteShift(t, val, f) {
var size = 0, i = 0;
if (f === 'dbcs') {
if (typeof val !== 'string')
throw new Error("expected string");
for (i = 0; i != val.length; ++i)
__writeUInt16LE(this, val.charCodeAt(i), this.l + 2 * i);
size = 2 * val.length;
}
else if (f === 'sbcs') {
{
val = val.replace(/[^\x00-\x7F]/g, "_"); // eslint-disable-line no-control-regex
for (i = 0; i != val.length; ++i)
this[this.l + i] = (val.charCodeAt(i) & 0xFF);
}
size = val.length;
}
else if (f === 'hex') {
for (; i < t; ++i) {
this[this.l++] = (parseInt(val.slice(2 * i, 2 * i + 2), 16) || 0);
}
return this;
}
else if (f === 'utf16le') {
/*:: if(typeof val !== "string") throw new Error("unreachable"); */
var end = Math.min(this.l + t, this.length);
for (i = 0; i < Math.min(val.length, t); ++i) {
var cc = val.charCodeAt(i);
this[this.l++] = (cc & 0xff);
this[this.l++] = (cc >> 8);
}
while (this.l < end)
this[this.l++] = 0;
return this;
}
else if (typeof val === 'number')
switch (t) {
case 1:
size = 1;
this[this.l] = val & 0xFF;
break;
case 2:
size = 2;
this[this.l] = val & 0xFF;
val >>>= 8;
this[this.l + 1] = val & 0xFF;
break;
case 3:
size = 3;
this[this.l] = val & 0xFF;
val >>>= 8;
this[this.l + 1] = val & 0xFF;
val >>>= 8;
this[this.l + 2] = val & 0xFF;
break;
case 4:
size = 4;
__writeUInt32LE(this, val, this.l);
break;
case 8:
size = 8;
if (f === 'f') {
write_double_le(this, val, this.l);
break;
}
/* falls through */
case 16: break;
case -4:
size = 4;
__writeInt32LE(this, val, this.l);
break;
}
this.l += size;
return this;
}
exports.WriteShift = WriteShift;
function CheckField(hexstr, fld) {
var m = __hexlify(this, this.l, hexstr.length >> 1);
if (m !== hexstr)
throw new Error(fld + 'Expected ' + hexstr + ' saw ' + m);
this.l += hexstr.length >> 1;
}
exports.CheckField = CheckField;
var prep_blob = function (blob, pos) {
blob.l = pos;
blob.read_shift = ReadShift;
blob.chk = CheckField;
blob.write_shift = WriteShift;
};
exports.prep_blob = prep_blob;
var new_buf = function (sz) {
var o = exports.new_raw_buf(sz);
prep_blob(o, 0);
return o;
};
exports.new_buf = new_buf;
// ---
var __bconcat = function (bufs /*:Array<RawBytes>*/) {
var is_all_arrays = true;
for (var w = 0; w < bufs.length; ++w)
if (!Array.isArray(bufs[w]))
is_all_arrays = false;
if (is_all_arrays)
return [].concat.apply([], bufs);
var maxlen = 0, i = 0;
for (i = 0; i < bufs.length; ++i)
maxlen += bufs[i].length;
var o = new Uint8Array(maxlen);
for (i = 0, maxlen = 0; i < bufs.length; maxlen += bufs[i].length, ++i)
o.set(bufs[i], maxlen);
return o;
};
var bconcat = __bconcat;
exports.bconcat = bconcat;
if (has_buf)
exports.bconcat = bconcat = function (bufs) { return Buffer.isBuffer(bufs[0]) ? Buffer.concat(bufs) : [].concat.apply([], bufs); };
//# sourceMappingURL=util.js.map

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js/wmf.js Normal file

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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
/*! wmf.js (C) 2020-present SheetJS LLC -- https://sheetjs.com */
var util_1 = require("./util");
var Records_1 = require("./Records");
var parse_emf = function (data) {
//try { require("fs").writeFileSync("out.emf", data); } catch(e) {}
};
/* 2.2.2.9 */
var parse_dib = function (data) {
if (data.length == 0)
return null;
util_1.prep_blob(data, 0);
/* DIBHeaderInfo */
var HeaderSize = data.read_shift(4);
var Width = 0, Height = 0, Planes = 0, BitCount = 0;
var Compression = 0, ImageSize = 0, XPelsPerMeter = 0, YPelsPerMeter = 0, ColorUsed = 0, ColorImportant = 0;
if (HeaderSize == 0x0C) {
Width = data.read_shift(2);
Height = data.read_shift(2);
}
else {
Width = data.read_shift(4, 'i');
Height = data.read_shift(4, 'i');
}
Planes = data.read_shift(2);
BitCount = data.read_shift(2);
var out = {
Width: Width,
Height: Height,
BitCount: BitCount,
};
if (HeaderSize != 0x0C) {
Compression = data.read_shift(4);
ImageSize = data.read_shift(4);
XPelsPerMeter = data.read_shift(4, 'i');
YPelsPerMeter = data.read_shift(4, 'i');
ColorUsed = data.read_shift(4);
ColorImportant = data.read_shift(4);
out["Compression"] = Compression;
if (BitCount == 24 && ImageSize > Height * 3 * Width)
Width = out["Width"] = ImageSize / (Height * 3);
}
/* Colors */
/* BitmapBuffer */
if (ImageSize == data.length - data.l) {
out["ImageData"] = data.slice(data.l, data.length);
util_1.prep_blob(out["ImageData"], 0);
}
return out;
};
var add_to_objects = function (objects, obj) {
var found = false;
for (var i = 0; i < objects.length; ++i)
if (!objects[i]) {
objects[i] = obj;
found = true;
}
if (!found)
objects.push(obj);
};
exports.get_actions_prepped_bytes = function (data) {
var out = [];
/* 2.3.22 META_HEADER */
// Type (2 bytes) must be 1 or 2
var h = data.read_shift(2);
if (h != 1 && h != 2)
throw "Header: Type " + h + " must be 1 or 2";
// HeaderSize expected to be 9
if ((h = data.read_shift(2)) != 9)
throw "Header: HeaderSize " + h + " must be 9";
// Version (2 bytes) 1 or 3
h = data.read_shift(2);
if (h != 0x0100 && h != 0x0300)
throw "Header: Version " + h + " must be 0x0100 or 0x0300";
// SizeLow
// SizeHigh
// #Objects
// MaxRecord
// NumberOfMembers
data.l = 18;
var rt = 0;
/* used for EMF */
var escapecnt = 0;
var CommentRecordCount = 0;
var RemainingBytes = 0;
var EnhancedMetafileDataSize = 0;
var bufs = [];
var objects = [];
var states = [];
var state = {};
var sidx = -1;
while (data.l < data.length) {
h = data.read_shift(4);
var end = data.l + h * 2 - 4;
rt = data.read_shift(2);
var Record = Records_1.WMFRecords[rt];
if (rt == 0x0000)
break; // META_EOF
switch (rt) {
case 0x0626:
{ // META_ESCAPE
var EscapeFunction = data.read_shift(2);
var Escape = Records_1.WMFEscapes[EscapeFunction];
//console.log("::", Escape);
/* 2.3.6 */
switch (EscapeFunction) {
case 0x000F:
{ // META_ESCAPE_ENHANCED_METAFILE
var ByteCount = data.read_shift(2);
var tmp = data.read_shift(4);
if (tmp != 0x43464D57)
throw "Escape: Comment ID 0x" + tmp.toString(16) + " != 0x43464D57";
tmp = data.read_shift(4);
if (tmp != 0x00000001)
throw "Escape: Comment Type 0x" + tmp.toString(16) + " != 0x00000001";
tmp = data.read_shift(4);
if (tmp != 0x00010000)
throw "Escape: Version 0x" + tmp.toString(16) + " != 0x00010000";
var Checksum = data.read_shift(2);
data.l += 4; // Flags
if (escapecnt == 0) {
CommentRecordCount = data.read_shift(4); // total number of records
}
else {
var _CommentRecordCount = data.read_shift(4);
if (_CommentRecordCount != CommentRecordCount)
throw "Escape: CommentRecordCount " + _CommentRecordCount + " != " + CommentRecordCount;
}
var CurrentRecordSize = data.read_shift(4); // size of this record
var _RemainingBytes = data.read_shift(4);
if (escapecnt > 0 && CurrentRecordSize + _RemainingBytes != RemainingBytes)
throw "Escape: " + RemainingBytes + " != " + CurrentRecordSize + " + " + _RemainingBytes;
RemainingBytes = _RemainingBytes;
var _EnhancedMetafileDataSize = data.read_shift(4);
if (escapecnt == 0) {
if (_EnhancedMetafileDataSize != CurrentRecordSize + _RemainingBytes)
throw "Escape: " + _EnhancedMetafileDataSize + " != " + CurrentRecordSize + " + " + _RemainingBytes;
EnhancedMetafileDataSize = _EnhancedMetafileDataSize;
}
else if (EnhancedMetafileDataSize != _EnhancedMetafileDataSize)
throw "Escape: " + EnhancedMetafileDataSize + " != " + _EnhancedMetafileDataSize;
if (ByteCount != (end - data.l) + 34)
throw "Escape: Sizes " + ByteCount + " != " + (end - data.l) + " + 34";
if (end - data.l != CurrentRecordSize)
throw "Escape: CRSize " + CurrentRecordSize + " != " + (end - data.l);
bufs.push(data.slice(data.l, end));
++escapecnt;
if (escapecnt == CommentRecordCount) {
var prepped = util_1.bconcat(bufs);
util_1.prep_blob(prepped, 0);
parse_emf(prepped);
}
}
break;
default: throw "Escape: Unrecognized META_ESCAPE Type 0x" + EscapeFunction.toString(16);
}
}
break;
// #region 2.3.1 Bitmap Record Types
case 0x0940:
{ // 2.3.1.2 META_DIBBITBLT
var has_bitmap = h != (rt >> 8) + 3;
var RasterOperation = data.read_shift(4);
var YSrc = data.read_shift(2, "i");
var XSrc = data.read_shift(2, "i");
if (!has_bitmap)
data.l += 2;
var Height = data.read_shift(2, "i");
var Width = data.read_shift(2, "i");
var YDest = data.read_shift(2, "i");
var XDest = data.read_shift(2, "i");
var res = {
t: "cpy",
src: [[XSrc, Width], [YSrc, Height]],
dst: [XDest, YDest],
rop: RasterOperation,
s: Object.assign({}, state)
};
if (has_bitmap) {
var DIB = parse_dib(data.slice(data.l, end));
res.data = DIB;
}
out.push(res);
}
break;
case 0x0B41:
{ // 2.3.1.3 META_DIBSTRETCHBLT
var has_bitmap = h != (rt >> 8) + 3;
var RasterOperation = data.read_shift(4);
var SrcHeight = data.read_shift(2, "i");
var SrcWidth = data.read_shift(2, "i");
var YSrc = data.read_shift(2, "i");
var XSrc = data.read_shift(2, "i");
if (!has_bitmap)
data.l += 2;
var DestHeight = data.read_shift(2, "i");
var DestWidth = data.read_shift(2, "i");
var YDest = data.read_shift(2, "i");
var XDest = data.read_shift(2, "i");
var res = {
t: "str",
src: [[XSrc, SrcWidth], [YSrc, SrcHeight]],
dst: [[XDest, DestWidth], [YDest, DestHeight]],
rop: RasterOperation,
s: Object.assign({}, state)
};
if (has_bitmap) {
var DIB = parse_dib(data.slice(data.l, end));
res.data = DIB;
}
out.push(res);
}
break;
// #endregion
// #region 2.3.3 Drawing Record Types
case 0x0A32:
{ // 2.3.3.5 META_EXTTEXTOUT
var Y = data.read_shift(2);
var X = data.read_shift(2);
var StringLength = data.read_shift(2);
var fwOpts = data.read_shift(2); // 2.1.2.2
if (fwOpts & 0x06) {
data.l += 8; // Rectangle 2.2.2.18 (for clipping/opaquing)
}
var str = data.read_shift(StringLength, 'cpstr');
if (data.l < end) { /* TODO: Dx */ }
out.push({ t: "text", v: str, p: [X, Y], s: Object.assign({}, state) });
/* TODO!! */
}
break;
case 0x0325: // 2.3.3.14 META_POLYLINE
case 0x0324: // 2.3.3.15 META_POLYGON
{
var nPoints = data.read_shift(2);
var points = [];
for (var i = 0; i < nPoints; ++i)
points.push([data.read_shift(2), data.read_shift(2)]);
out.push({ t: "poly", p: points, g: rt !== 0x0325, s: state });
}
break;
case 0x0538:
{ // 2.3.3.16 META_POLYPOLYGON
var nPolygons = data.read_shift(2);
var polys = [];
var szs = [];
/* 2.2.2.17 PolyPolygon */
for (var i = 0; i < nPolygons; ++i)
szs[i] = data.read_shift(2);
for (var i = 0; i < szs.length; ++i) {
polys[i] = [];
for (var j = 0; j < szs[i]; ++j)
polys[i].push([data.read_shift(2), data.read_shift(2)]);
out.push({ t: "poly", p: polys[i], g: true, s: state });
}
}
break;
// #endregion
// #region 2.3.4 Object Record Types
case 0x02FC:
{ // 2.3.4.1 META_CREATEBRUSHINDIRECT
var obj = {};
obj.Brush = {
Style: data.read_shift(2),
Color: data.read_shift(4),
Hatch: data.read_shift(2)
};
add_to_objects(objects, obj);
}
break;
case 0x02FB:
{ // 2.3.4.2 META_CREATEFONTINDIRECT
var obj = {};
obj.Font = {};
/* 2.2.1.2 Font TODO!! */
var Height = data.read_shift(2, "i");
var Width = data.read_shift(2, "i");
var Escapement = data.read_shift(2, "i");
var Orientation = data.read_shift(2, "i");
var Weight = data.read_shift(2, "i");
var Italic = !!data.read_shift(1);
var Underline = !!data.read_shift(1);
var StrikeOut = !!data.read_shift(1);
var CharSet = data.read_shift(1);
var OutPrecision = data.read_shift(1);
var ClipPrecision = data.read_shift(1);
var Quality = data.read_shift(1);
var PitchAndFamily = data.read_shift(1);
var Facename = data.read_shift(32, "cstr");
obj.Font.Name = Facename;
obj.Font.Height = Height;
obj.Font.Weight = Weight;
obj.Font.Italic = Italic;
obj.Font.Angle = Escapement / 10;
add_to_objects(objects, obj);
}
break;
case 0x02FA:
{ // 2.3.4.5 META_CREATEPENINDIRECT
var obj = {};
obj.Pen = {
Style: data.read_shift(2),
Width: data.read_shift(4) & 0xFF,
Color: data.read_shift(4)
};
add_to_objects(objects, obj);
}
break;
case 0x01F0:
{ // 2.3.4.7 META_DELETEOBJECT
var ObjectIndex = data.read_shift(2);
//console.log("DELETE", ObjectIndex, objects[ObjectIndex]);
objects[ObjectIndex] = null;
}
break;
case 0x012C:
{ // 2.3.4.9 META_SELECTCLIPREGION
var Region = data.read_shift(2);
//console.log("CLIPREGION", Region, objects[Region]);
//Object.assign(state, objects[Region]);
}
break;
case 0x012D:
{ // 2.3.4.10 META_SELECTOBJECT
var ObjectIndex = data.read_shift(2);
//console.log("SELECT", ObjectIndex, objects[ObjectIndex]);
Object.assign(state, objects[ObjectIndex]);
// TODO!!
}
break;
// #endregion
// #region 2.3.5 State Record Types
case 0x0416: // 2.3.5.3 META_INTERSECTCLIPRECT
state.ClipRect = [[0, 0], [0, 0]];
state.ClipRect[1][1] = data.read_shift(2);
state.ClipRect[1][0] = data.read_shift(2);
state.ClipRect[0][1] = data.read_shift(2);
state.ClipRect[0][0] = data.read_shift(2);
break;
case 0x0127:
{ // 2.3.5.10 META_RESTOREDC
var nSavedDC = data.read_shift(2, 'i');
state = states[sidx = (nSavedDC >= 0 ? nSavedDC : sidx + nSavedDC)];
}
break;
case 0x001E: // 2.3.5.11 META_SAVEDC
states.push(state);
sidx = states.length - 1;
state = JSON.parse(JSON.stringify(state));
break;
case 0x0102: // 2.3.5.15 META_SETBKMODE
state.BkMode = data.read_shift(2);
break;
case 0x0103: // 2.3.5.17 META_SETMAPMODE
state.MapMode = data.read_shift(2);
break;
case 0x0106: // 2.3.5.20 META_SETPOLYFILLMODE
state.PolyFillMode = data.read_shift(2);
break;
case 0x0107: // 2.3.5.23 META_SETSTRETCHBLTMODE
state.StretchMode = data.read_shift(2);
break;
case 0x012E: // 2.3.5.24 META_SETTEXTALIGN
state.TextAlignmentMode = data.read_shift(2);
break;
case 0x0209: // 2.3.5.26 META_SETTEXTCOLOR
state.TextColor = data.read_shift(4);
break;
case 0x020C: // 2.3.5.30 META_SETWINDOWEXT
state.Extent = [0, 0];
state.Extent[1] = data.read_shift(2);
state.Extent[0] = data.read_shift(2);
break;
case 0x020B: // 2.3.5.31 META_SETWINDOWORG
state.Origin = [0, 0];
state.Origin[1] = data.read_shift(2);
state.Origin[0] = data.read_shift(2);
break;
// #endregion
default:
if (!Record)
throw "Record: Unrecognized type 0x" + rt.toString(16);
console.log(Record);
}
data.l = end;
//if(rt != 0x0626) console.log(Record);
}
if (rt !== 0)
throw "Record: Last Record Type " + rt + " is not EOF type";
return out;
};
exports.image_size_prepped_bytes = function (data) {
var origin = [NaN, NaN], extents = [NaN, NaN];
/* 2.3.22 META_HEADER */
// Type (2 bytes) must be 1 or 2
var h = data.read_shift(2);
if (h != 1 && h != 2)
throw "Header: Type " + h + " must be 1 or 2";
// HeaderSize expected to be 9
if ((h = data.read_shift(2)) != 9)
throw "Header: HeaderSize " + h + " must be 9";
// Version (2 bytes) 1 or 3
h = data.read_shift(2);
if (h != 0x0100 && h != 0x0300)
throw "Header: Version " + h + " must be 0x0100 or 0x0300";
data.l = 18;
var rt = 0;
while (data.l < data.length) {
h = data.read_shift(4);
var end = data.l + h * 2 - 4;
rt = data.read_shift(2);
if (rt == 0x0000)
break; // META_EOF
switch (rt) {
case 0x020C: // 2.3.5.30 META_SETWINDOWEXT
extents[1] = data.read_shift(2);
extents[0] = data.read_shift(2);
break;
case 0x020B: // 2.3.5.31 META_SETWINDOWORG
origin[1] = data.read_shift(2);
origin[0] = data.read_shift(2);
break;
}
data.l = end;
}
return [extents[0] - origin[0], extents[1] - origin[1]];
};
//# sourceMappingURL=wmf.js.map

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/*! wmf.js (C) 2020-present SheetJS LLC -- https://sheetjs.com */
var WMF = require("../js/");
module.exports = WMF;

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const webpack = require('webpack');
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
const banner = '/*! wmf.js (C) 2020-present SheetJS LLC -- https://sheetjs.com */';
module.exports = {
mode: 'development',
entry: './misc/entry.js',
devtool: 'source-map',
output: {
library: 'WMF',
libraryTarget: 'var',
filename: 'wmf.js',
},
node: { process: false },
module: {
rules: [
{
test: /\.js$/,
use: ['source-map-loader'],
enforce: 'pre'
}
]
},
optimization: {
minimizer: [
new UglifyJsPlugin({
uglifyOptions: {
output: { beautify: false, preamble: banner }
}
})
]
},
plugins: [
new webpack.BannerPlugin({ banner, raw: true, entryOnly: true })
]
};

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const webpack = require('webpack');
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
var nodeExternals = require('webpack-node-externals');
const banner = '/*! wmf.js (C) 2020-present SheetJS LLC -- https://sheetjs.com */';
module.exports = {
mode: 'development',
entry: './misc/entry.js',
devtool: 'source-map',
output: {
library: 'WMF',
libraryTarget: 'commonjs2',
filename: 'wmf.node.js'
},
target: 'node',
externals: [nodeExternals()],
module: {
rules: [
{
test: /\.js$/,
use: ['source-map-loader'],
enforce: 'pre'
}
]
},
optimization: {
minimizer: [
new UglifyJsPlugin({
uglifyOptions: {
output: { beautify: false, preamble: banner }
}
})
]
},
plugins: [
new webpack.BannerPlugin({ banner, raw: true, entryOnly: true })
]
};

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{
"name": "wmf",
"version": "1.0.0",
"author": "sheetjs",
"description": "Windows MetaFile (WMF) parser",
"keywords": [ "wmf", "image" ],
"main": "./dist/wmf.node.js",
"browser": "./js/index.js",
"dependencies": {
},
"devDependencies": {
"source-map-loader": "^0.2.4",
"uglifyjs-webpack-plugin": "^2.2.0"
},
"homepage": "https://sheetjs.com/",
"files": ["dist/", "LICENSE", "README.md", "js/"],
"bugs": { "url": "https://github.com/SheetJS/js-wmf/issues" },
"license": "Apache-2.0",
"engines": { "node": ">=12.0" }
}

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/*! wmf.js (C) 2020-present SheetJS LLC -- https://sheetjs.com */
export interface WMFRecord {
n: string;
}
export interface WMFEscape {
n: string;
}
/* 2.1.1.1 RecordType Enumeration */
export const WMFRecords: {[key: number]: WMFRecord} = {
0x0000: { n: "META_EOF" }, // 2.3.2.1
0x0626: { n: "META_ESCAPE" }, // 2.3.6.1
0x0940: { n: "META_DIBBITBLT" }, // 2.3.1.2
0x0B41: { n: "META_DIBSTRETCHBLT" }, // 2.3.1.3
0x0A32: { n: "META_EXTTEXTOUT" }, // 2.3.3.5
0x0325: { n: "META_POLYLINE" }, // 2.3.3.14
0x0324: { n: "META_POLYGON" }, // 2.3.3.15
0x0538: { n: "META_POLYPOLYGON" }, // 2.3.3.16
0x02FC: { n: "META_CREATEBRUSHINDIRECT" }, // 2.3.4.1
0x02FB: { n: "META_CREATEFONTINDIRECT" }, // 2.3.4.2
0x02FA: { n: "META_CREATEPENINDIRECT" }, // 2.3.4.5
0x01F0: { n: "META_DELETEOBJECT" }, // 2.3.4.7
0x012C: { n: "META_SELECTCLIPREGION" }, // 2.3.4.9
0x012D: { n: "META_SELECTOBJECT" }, // 2.3.4.10
0x0416: { n: "META_INTERSECTCLIPRECT" }, // 2.3.5.3
0x0035: { n: "META_REALIZEPALETTE" }, // 2.3.5.8
0x0127: { n: "META_RESTOREDC" }, // 2.3.5.10
0x001E: { n: "META_SAVEDC" }, // 2.3.5.11
0x0102: { n: "META_SETBKMODE" }, // 2.3.5.15
0x0103: { n: "META_SETMAPMODE" }, // 2.3.5.17
0x0037: { n: "META_SETPALENTRIES" }, // 2.3.5.19
0x0106: { n: "META_SETPOLYFILLMODE" }, // 2.3.5.20
0x0107: { n: "META_SETSTRETCHBLTMODE" }, // 2.3.5.23
0x012E: { n: "META_SETTEXTALIGN" }, // 2.3.5.24
0x0209: { n: "META_SETTEXTCOLOR" }, // 2.3.5.26
0x020C: { n: "META_SETWINDOWEXT" }, // 2.3.5.30
0x020B: { n: "META_SETWINDOWORG" }, // 2.3.5.31
0xFFFF: { n: "META_SHEETJS" }
};
export const WMFEscapes: {[key: number]: WMFEscape} = {
0x000F: { n: "META_ESCAPE_ENHANCED_METAFILE" }
};

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/*! wmf.js (C) 2020-present SheetJS LLC -- https://sheetjs.com */
import { PreppedBytes, prep_blob } from './util';
import { Action, PlaybackDeviceContextState, get_actions_prepped_bytes } from './wmf'
export const css_color = (clr: number): string => `#${(clr & 0xFF).toString(16).padStart(2, "0")}${((clr>>8) & 0xFF).toString(16).padStart(2, "0")}${((clr>>16) & 0xFF).toString(16).padStart(2, "0")}`
export const set_ctx_state = (ctx: CanvasRenderingContext2D, state: PlaybackDeviceContextState): void => {
if(!state) return;
let font = "";
if(state.Font) {
if(state.Font.Italic) font += " italic";
if(state.Font.Weight) font += ` ${state.Font.Weight == 700 ? "bold" : state.Font.Weight == 400 ? "" : state.Font.Weight}`;
if(state.Font.Height < 0) font += ` ${-state.Font.Height}px`;
else if(state.Font.Height > 0) font += ` ${state.Font.Height}px`;
let name = state.Font.Name || "";
if(name == "System") name = "Calibri"; // TODO: default sys font is Segoe UI
if(name) font += ` '${name}', sans-serif`;
ctx.font = font.trim();
}
};
// TODO: DIB BIT ORDER?
export const render_actions_to_context = (out: Action[], ctx: CanvasRenderingContext2D) => {
out.forEach(act => {
ctx.save();
set_ctx_state(ctx, act.s);
switch(act.t) {
case "poly":
ctx.beginPath();
ctx.moveTo(act.p[0][0], act.p[0][1]);
act.p.slice(1).forEach(([x,y]) => {
ctx.lineTo(x, y);
});
if(act.g) ctx.closePath();
ctx.stroke();
break;
case "text":
if(act.s && act.s.TextColor) ctx.fillStyle = css_color(act.s.TextColor);
if(act.s.Font.Angle != 0) {
ctx.translate(act.p[0], act.p[1]);
ctx.rotate(-act.s.Font.Angle * Math.PI / 180);
ctx.fillText(act.v, 0, 0);
ctx.translate(-act.p[0], -act.p[1]);
}
else ctx.fillText(act.v, act.p[0], act.p[1]);
break;
case "cpy": {
// TODO: base on ROP
const idata = ctx.getImageData(act.src[0][0], act.src[1][0], act.src[0][1], act.src[1][1]);
ctx.putImageData(idata, act.dst[0], act.dst[1]);
} break;
case "str": {
if(act.data && act.data.BitCount == 24 && act.data.ImageData) {
const _o = new Uint8ClampedArray(act.data.Width * act.data.Height * 4);
for(let i = 0; i < act.data.Width * act.data.Height; ++i) {
const j = (i % act.data.Width) + act.data.Width * (act.data.Height - 1 - Math.floor(i / act.data.Width));
_o[4*i] = act.data.ImageData[3*j+2];
_o[4*i+1] = act.data.ImageData[3*j+1];
_o[4*i+2] = act.data.ImageData[3*j];
_o[4*i+3] = 255;
}
const idata = new ImageData(_o, act.data.Width, act.data.Height);
ctx.putImageData(idata, act.dst[0][0], act.dst[1][0]);
}
// TODO: ROP et al
}
}
ctx.restore();
});
}
export const render_canvas = (out: Action[], image: HTMLCanvasElement): void => {
let ctx: CanvasRenderingContext2D;
/* find first action with window info */
out.forEach(act => {
if(ctx) return;
if(!act.s) return;
if(!act.s.Extent || !act.s.Origin) return;
image.width = act.s.Extent[0] - act.s.Origin[0];
image.height = act.s.Extent[1] - act.s.Origin[1];
ctx = image.getContext('2d');
ctx.save();
ctx.fillStyle = 'rgb(255,255,255)';
ctx.fillRect(0, 0, act.s.Extent[0] - act.s.Origin[0], act.s.Extent[1] - act.s.Origin[1])
ctx.restore();
});
if(!ctx) ctx = image.getContext('2d');
render_actions_to_context(out, ctx);
}
export const draw_canvas = (data: Buffer | Uint8Array | ArrayBuffer, image: HTMLCanvasElement): void => {
if(data instanceof ArrayBuffer) return draw_canvas(new Uint8Array(data), image);
prep_blob((data as any), 0);
const out: Action[] = get_actions_prepped_bytes(data as PreppedBytes);
return render_canvas(out, image);
};

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/*! wmf.js (C) 2020-present SheetJS LLC -- https://sheetjs.com */
import { PreppedBytes, prep_blob } from './util';
import { Action, get_actions_prepped_bytes, image_size_prepped_bytes } from './wmf'
export { draw_canvas, render_canvas } from './canvas';
export const get_actions = (data: Buffer | Uint8Array | ArrayBuffer): Action[] => {
if(data instanceof ArrayBuffer) return get_actions(new Uint8Array(data));
prep_blob((data as any), 0);
return get_actions_prepped_bytes(data as PreppedBytes);
}
export const image_size = (data: Buffer | Uint8Array | ArrayBuffer): [number, number] => {
if(data instanceof ArrayBuffer) return image_size(new Uint8Array(data));
prep_blob((data as any), 0);
return image_size_prepped_bytes(data as PreppedBytes);
}

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/*! wmf.js (C) 2020-present SheetJS LLC -- https://sheetjs.com */
export type RawBytes = Buffer | number[];
export type PreppedBytes = RawBytes & {
l: number;
read_shift(size: 1): number;
read_shift(size: 2): number;
read_shift(size: 2, t: "i"): number;
read_shift(size: 4): number;
read_shift(size: 4, t: "i"): number;
read_shift(size: 8, t: "f"): number;
read_shift(size: number, t: "cstr"): string;
read_shift(size: number, t: "cpstr"): string;
read_shift(size: number, t: "_wstr"): string;
read_shift(size: number, t?: string): number|string;
chk(hexstr: string, fld: string): void;
write_shift(t: number, val: string|number, f?: string): void;
};
// ---
const has_buf = !!(typeof Buffer !== 'undefined' && typeof process !== 'undefined' && typeof process.versions !== 'undefined' && process.versions.node);
let Buffer_from: typeof Buffer.from;
if(typeof Buffer !== 'undefined') {
let nbfs = !Buffer.from;
if(!nbfs) try {
Buffer.from("foo", "utf8");
} catch(e) { nbfs = true; }
Buffer_from = nbfs ? ((buf, enc?: string): Buffer => (enc) ? new Buffer(buf, (enc as BufferEncoding)) : new Buffer(buf)) : Buffer.from.bind(Buffer);
if(!Buffer.alloc) Buffer.alloc = function(n: number): Buffer { return new Buffer(n); };
if(!Buffer.allocUnsafe) Buffer.allocUnsafe = function(n: number): Buffer { return new Buffer(n); };
}
export { Buffer_from, has_buf };
export const new_raw_buf = (len: number): Buffer|number[] => has_buf ? Buffer.alloc(len) : new Array(len);
export const new_unsafe_buf = (len: number): Buffer|number[] => has_buf ? Buffer.allocUnsafe(len) : new Array(len);
export const _chr = (c: number): string => String.fromCharCode(c);
export const chr0 = /\u0000/g; // eslint-disable-line no-control-regex
export const chr1 = /[\u0001-\u0006]/g; // eslint-disable-line no-control-regex
// ---
const read_double_le = (b: RawBytes, idx: number): number => {
const s = 1 - 2 * (b[idx + 7] >>> 7);
let e = ((b[idx + 7] & 0x7f) << 4) + ((b[idx + 6] >>> 4) & 0x0f);
let m = (b[idx+6]&0x0f);
for(let i = 5; i >= 0; --i) m = m * 256 + b[idx + i];
if(e == 0x7ff) return m == 0 ? (s * Infinity) : NaN;
if(e == 0) e = -1022;
else { e -= 1023; m += Math.pow(2,52); }
return s * Math.pow(2, e - 52) * m;
};
const write_double_le = (b: RawBytes, v: number, idx: number): void => {
const bs = ((((v < 0) || (1/v == -Infinity)) ? 1 : 0) << 7);
let e = 0, m = 0;
const av = bs ? (-v) : v;
if(!isFinite(av)) { e = 0x7ff; m = isNaN(v) ? 0x6969 : 0; }
else if(av == 0) e = m = 0;
else {
e = Math.floor(Math.log(av) / Math.LN2);
m = av * Math.pow(2, 52 - e);
if((e <= -1023) && (!isFinite(m) || (m < Math.pow(2,52)))) { e = -1022; }
else { m -= Math.pow(2,52); e+=1023; }
}
for(let i = 0; i <= 5; ++i, m/=256) b[idx + i] = m & 0xff;
b[idx + 6] = ((e & 0x0f) << 4) | (m & 0xf);
b[idx + 7] = (e >> 4) | bs;
};
let __toBuffer = (bufs/*:Array<Array<RawBytes> >*/): RawBytes => {
const x: number[] =[];
for(let i=0; i<bufs[0].length; ++i) if(bufs[0][i])
for(let j=0, L=bufs[0][i].length; j<L; j+=10240) x.push(...bufs[0][i].slice(j,j+10240));
return x;
};
const ___toBuffer = __toBuffer;
const __readUInt8 = (b: RawBytes, idx: number): number => b[idx];
const __readUInt16LE = (b: RawBytes, idx: number): number => (b[idx+1]*(1<<8))+b[idx];
const __readInt16LE = (b: RawBytes, idx: number): number => { const u = (b[idx+1]*(1<<8))+b[idx]; return (u < 0x8000) ? u : ((0xffff - u + 1) * -1); };
const __readUInt32LE = (b: RawBytes, idx: number): number => b[idx+3]*(1<<24)+(b[idx+2]<<16)+(b[idx+1]<<8)+b[idx];
const __readInt32LE = (b: RawBytes, idx: number): number => (b[idx+3]<<24)|(b[idx+2]<<16)|(b[idx+1]<<8)|b[idx];
const __readInt32BE = (b: RawBytes, idx: number): number => (b[idx]<<24)|(b[idx+1]<<16)|(b[idx+2]<<8)|b[idx+3];
let __utf16le = (b: RawBytes, s: number, e: number): string => {
const ss: string[] = [];
for(let i=s; i<e; i+=2) ss.push(String.fromCharCode(__readUInt16LE(b,i)));
return ss.join("").replace(chr0,'');
};
const ___utf16le = __utf16le;
let __hexlify = function(b/*:RawBytes|CFBlob*/,s: number,l: number): string { const ss: string[] = []; for(let i=s; i<s+l; ++i) ss.push(("0" + b[i].toString(16)).slice(-2)); return ss.join(""); };
const ___hexlify = __hexlify;
let __utf8 = function(b/*:RawBytes|CFBlob*/,s: number,e: number): string { const ss=[]; for(let i=s; i<e; i++) ss.push(String.fromCharCode(__readUInt8(b,i))); return ss.join(""); };
const ___utf8 = __utf8;
let __lpstr = function(b/*:RawBytes|CFBlob*/,i: number): string { const len = __readUInt32LE(b,i); return len > 0 ? __utf8(b, i+4,i+4+len-1) : "";};
const ___lpstr = __lpstr;
let __cpstr = function(b/*:RawBytes|CFBlob*/,i: number): string { const len = __readUInt32LE(b,i); return len > 0 ? __utf8(b, i+4,i+4+len-1) : "";};
const ___cpstr = __cpstr;
let __lpwstr = function(b/*:RawBytes|CFBlob*/,i: number): string { const len = 2*__readUInt32LE(b,i); return len > 0 ? __utf8(b, i+4,i+4+len-1) : "";};
const ___lpwstr = __lpwstr;
let __lpp4, ___lpp4;
__lpp4 = ___lpp4 = function lpp4_(b/*:RawBytes|CFBlob*/,i: number): string { const len = __readUInt32LE(b,i); return len > 0 ? __utf16le(b, i+4,i+4+len) : "";};
const ___8lpp4 = function(b/*:RawBytes|CFBlob*/,i: number): string { const len = __readUInt32LE(b,i); return len > 0 ? __utf8(b, i+4,i+4+len) : "";};
let __8lpp4 = ___8lpp4;
const ___double = (b/*:RawBytes|CFBlob*/, idx: number): number => read_double_le(b, idx);
let __double = ___double;
if(has_buf) {
__utf16le = (b/*:RawBytes|CFBlob*/,s: number,e: number): string => (!Buffer.isBuffer(b)) ? ___utf16le(b,s,e) : b.toString('utf16le',s,e).replace(chr0,'');
__hexlify = (b/*:RawBytes|CFBlob*/,s: number,l: number): string => Buffer.isBuffer(b) ? b.toString('hex',s,s+l) : ___hexlify(b,s,l);
__lpstr = (b/*:RawBytes|CFBlob*/, i: number): string => { if(!Buffer.isBuffer(b)) return ___lpstr(b, i); const len = b.readUInt32LE(i); return len > 0 ? b.toString('utf8',i+4,i+4+len-1) : "";};
__cpstr = (b/*:RawBytes|CFBlob*/, i: number): string => { if(!Buffer.isBuffer(b)) return ___cpstr(b, i); const len = b.readUInt32LE(i); return len > 0 ? b.toString('utf8',i+4,i+4+len-1) : "";};
__lpwstr = (b/*:RawBytes|CFBlob*/, i: number): string => { if(!Buffer.isBuffer(b)) return ___lpwstr(b, i); const len = 2*b.readUInt32LE(i); return b.toString('utf16le',i+4,i+4+len-1);};
__lpp4 = (b/*:RawBytes|CFBlob*/, i: number): string => { if(!Buffer.isBuffer(b)) return ___lpp4(b, i); const len = b.readUInt32LE(i); return b.toString('utf16le',i+4,i+4+len);};
__8lpp4 = (b/*:RawBytes|CFBlob*/, i: number): string => { if(!Buffer.isBuffer(b)) return ___8lpp4(b, i); const len = b.readUInt32LE(i); return b.toString('utf8',i+4,i+4+len);};
__utf8 = (b/*:RawBytes|CFBlob*/, s: number, e: number): string => (Buffer.isBuffer(b)) ? b.toString('utf8',s,e) : ___utf8(b,s,e);
__toBuffer = (bufs): RawBytes => (bufs[0].length > 0 && Buffer.isBuffer(bufs[0][0])) ? Buffer.concat(bufs[0]) : ___toBuffer(bufs);
__double = (b/*:RawBytes|CFBlob*/, i: number): number => (Buffer.isBuffer(b)) ? b.readDoubleLE(i) : ___double(b,i);
}
function ReadShift(size: 1): number;
function ReadShift(size: 2): number;
function ReadShift(size: 2, t: "i"): number;
function ReadShift(size: 4): number;
function ReadShift(size: 4, t: "i"): number;
function ReadShift(size: 8, t: "f"): number;
function ReadShift(size: number, t: "cstr"): string;
function ReadShift(size: number, t: "cpstr"): string;
function ReadShift(size: number, t: "_wstr"): string;
function ReadShift(size: number, t?: string): number|string {
let o="", oI = 0, oR, w, vv, i, loc;
const oo = [];
switch(t) {
case 'dbcs':
loc = this.l;
if(has_buf && Buffer.isBuffer(this)) o = this.slice(this.l, this.l+2*size).toString("utf16le");
else for(i = 0; i < size; ++i) { o+=String.fromCharCode(__readUInt16LE(this, loc)); loc+=2; }
size *= 2;
break;
case 'utf8': o = __utf8(this, this.l, this.l + size); break;
case 'utf16le': size *= 2; o = __utf16le(this, this.l, this.l + size); break;
case 'wstr':
return ReadShift.call(this, size, 'dbcs');
/* [MS-OLEDS] 2.1.4 LengthPrefixedAnsiString */
case 'lpstr-ansi': o = __lpstr(this, this.l); size = 4 + __readUInt32LE(this, this.l); break;
case 'lpstr-cp': o = __cpstr(this, this.l); size = 4 + __readUInt32LE(this, this.l); break;
/* [MS-OLEDS] 2.1.5 LengthPrefixedUnicodeString */
case 'lpwstr': o = __lpwstr(this, this.l); size = 4 + 2 * __readUInt32LE(this, this.l); break;
/* [MS-OFFCRYPTO] 2.1.2 Length-Prefixed Padded Unicode String (UNICODE-LP-P4) */
case 'lpp4': size = 4 + __readUInt32LE(this, this.l); o = __lpp4(this, this.l); if(size & 0x02) size += 2; break;
/* [MS-OFFCRYPTO] 2.1.3 Length-Prefixed UTF-8 String (UTF-8-LP-P4) */
case '8lpp4': size = 4 + __readUInt32LE(this, this.l); o = __8lpp4(this, this.l); if(size & 0x03) size += 4 - (size & 0x03); break;
case 'cstr': size = 0; o = "";
while((w=__readUInt8(this, this.l + size++))!==0) oo.push(String.fromCharCode(w));
o = oo.join(""); break;
case '_wstr': size = 0; o = "";
while((w=__readUInt16LE(this,this.l +size))!==0){oo.push(String.fromCharCode(w));size+=2;}
size+=2; o = oo.join(""); break;
/* sbcs and dbcs support continue records in the SST way TODO codepages */
case 'dbcs-cont': o = ""; loc = this.l;
for(i = 0; i < size; ++i) {
if(this.lens && this.lens.indexOf(loc) !== -1) {
w = __readUInt8(this, loc);
this.l = loc + 1;
vv = ReadShift.call(this, size-i, w ? 'dbcs-cont' : 'sbcs-cont');
return oo.join("") + vv;
}
oo.push(String.fromCharCode(__readUInt16LE(this, loc)));
loc+=2;
} o = oo.join(""); size *= 2; break;
case 'cpstr':
/* falls through */
case 'sbcs-cont': o = ""; loc = this.l;
for(i = 0; i != size; ++i) {
if(this.lens && this.lens.indexOf(loc) !== -1) {
w = __readUInt8(this, loc);
this.l = loc + 1;
vv = ReadShift.call(this, size-i, w ? 'dbcs-cont' : 'sbcs-cont');
return oo.join("") + vv;
}
oo.push(String.fromCharCode(__readUInt8(this, loc)));
loc+=1;
} o = oo.join(""); break;
default:
switch(size) {
case 1: oI = __readUInt8(this, this.l); this.l++; return oI;
case 2: oI = (t === 'i' ? __readInt16LE : __readUInt16LE)(this, this.l); this.l += 2; return oI;
case 4: case -4:
if(t === 'i' || ((this[this.l+3] & 0x80)===0)) { oI = ((size > 0) ? __readInt32LE : __readInt32BE)(this, this.l); this.l += 4; return oI; }
else { oR = __readUInt32LE(this, this.l); this.l += 4; } return oR;
case 8: case -8:
if(t === 'f') {
if(size == 8) oR = __double(this, this.l);
else oR = __double([this[this.l+7],this[this.l+6],this[this.l+5],this[this.l+4],this[this.l+3],this[this.l+2],this[this.l+1],this[this.l+0]], 0);
this.l += 8; return oR;
} else size = 8;
/* falls through */
case 16: o = __hexlify(this, this.l, size); break;
}}
this.l+=size; return o;
}
const __writeUInt32LE = (b/*:RawBytes|CFBlob*/, val: number, idx: number): void => { b[idx] = (val & 0xFF); b[idx+1] = ((val >>> 8) & 0xFF); b[idx+2] = ((val >>> 16) & 0xFF); b[idx+3] = ((val >>> 24) & 0xFF); };
const __writeInt32LE = (b/*:RawBytes|CFBlob*/, val: number, idx: number): void => { b[idx] = (val & 0xFF); b[idx+1] = ((val >> 8) & 0xFF); b[idx+2] = ((val >> 16) & 0xFF); b[idx+3] = ((val >> 24) & 0xFF); };
const __writeUInt16LE = (b/*:RawBytes|CFBlob*/, val: number, idx: number): void => { b[idx] = (val & 0xFF); b[idx+1] = ((val >>> 8) & 0xFF); };
function WriteShift(t: number, val: string|number, f?: string): void {
let size = 0, i = 0;
if(f === 'dbcs') {
if(typeof val !== 'string') throw new Error("expected string");
for(i = 0; i != val.length; ++i) __writeUInt16LE(this, val.charCodeAt(i), this.l + 2 * i);
size = 2 * val.length;
} else if(f === 'sbcs') {
{
val = (val as string).replace(/[^\x00-\x7F]/g, "_"); // eslint-disable-line no-control-regex
for(i = 0; i != val.length; ++i) this[this.l + i] = (val.charCodeAt(i) & 0xFF);
}
size = val.length;
} else if(f === 'hex') {
for(; i < t; ++i) {
this[this.l++] = (parseInt((val as string).slice(2*i, 2*i+2), 16)||0);
} return this;
} else if(f === 'utf16le') {
/*:: if(typeof val !== "string") throw new Error("unreachable"); */
const end: number = Math.min(this.l + t, this.length);
for(i = 0; i < Math.min((val as string).length, t); ++i) {
const cc = (val as string).charCodeAt(i);
this[this.l++] = (cc & 0xff);
this[this.l++] = (cc >> 8);
}
while(this.l < end) this[this.l++] = 0;
return this;
} else if(typeof val === 'number') switch(t) {
case 1: size = 1; this[this.l] = val&0xFF; break;
case 2: size = 2; this[this.l] = val&0xFF; val >>>= 8; this[this.l+1] = val&0xFF; break;
case 3: size = 3; this[this.l] = val&0xFF; val >>>= 8; this[this.l+1] = val&0xFF; val >>>= 8; this[this.l+2] = val&0xFF; break;
case 4: size = 4; __writeUInt32LE(this, val, this.l); break;
case 8: size = 8; if(f === 'f') { write_double_le(this, val, this.l); break; }
/* falls through */
case 16: break;
case -4: size = 4; __writeInt32LE(this, val, this.l); break;
}
this.l += size; return this;
}
function CheckField(hexstr: string, fld: string): void {
const m = __hexlify(this,this.l,hexstr.length>>1);
if(m !== hexstr) throw new Error(fld + 'Expected ' + hexstr + ' saw ' + m);
this.l += hexstr.length>>1;
}
const prep_blob = (blob: PreppedBytes, pos: number): void => {
blob.l = pos;
blob.read_shift = ReadShift;
blob.chk = CheckField;
blob.write_shift = WriteShift;
};
const new_buf = (sz: number): PreppedBytes => {
const o = (new_raw_buf(sz) as PreppedBytes);
prep_blob(o, 0);
return o;
};
export { ReadShift, WriteShift, CheckField, prep_blob, new_buf, __utf16le };
// ---
const __bconcat = function(bufs/*:Array<RawBytes>*/): Buffer | Uint8Array | number[] {
let is_all_arrays = true;
for(let w = 0; w < bufs.length; ++w) if(!Array.isArray(bufs[w])) is_all_arrays = false;
if(is_all_arrays) return [].concat(...bufs);
let maxlen = 0, i = 0;
for(i = 0; i < bufs.length; ++i) maxlen += bufs[i].length;
const o = new Uint8Array(maxlen);
for(i = 0, maxlen = 0; i < bufs.length; maxlen += bufs[i].length, ++i) o.set(bufs[i], maxlen);
return o;
};
let bconcat = __bconcat;
if(has_buf) bconcat = (bufs): Buffer | Uint8Array | number[] => Buffer.isBuffer(bufs[0]) ? Buffer.concat(bufs) : [].concat(...bufs);
export { bconcat };

533
src/wmf.ts Normal file

@ -0,0 +1,533 @@
/*! wmf.js (C) 2020-present SheetJS LLC -- https://sheetjs.com */
import { PreppedBytes, RawBytes, bconcat, prep_blob } from './util';
import { WMFRecords, WMFEscapes } from './Records';
export interface Brush {
/** Style (MS-WMF 2.1.1.4) */
Style?: Number;
/** Brush color RGB */
Color?: number;
/** Hatch Type (2.1.1.12 if brush is hatched) */
Hatch?: number;
}
export interface Pen {
Style?: number;
Width?: number;
Color?: number;
}
export interface Font {
Name?: string;
Height?: number;
Italic?: boolean;
Weight?: number;
Angle?: number;
}
export interface PlaybackDeviceContextState {
/** Mapping mode (MS-WMF 2.1.1.16) */
MapMode?: number;
/** Output window origin (X, Y) */
Origin?: [number, number];
/** Output window extents (X, Y) */
Extent?: [number, number];
/** Background Mix Mode (MS-WMF 2.1.1.20) */
BkMode?: number;
/** Polygon fill mode (MS-WMF 2.1.1.25) */
PolyFillMode?: number;
/** Bitmap stretching mode (MS-WMF 2.1.1.30) */
StretchMode?: number;
/** Text alignment mode (MS-WMF 2.1.2.3 / 2.1.2.4) */
TextAlignmentMode?: number;
/** Text foreground color RGB */
TextColor?: number;
/** Brush */
Brush?: Brush;
/** Font */
Font?: Font;
/** Pen */
Pen?: Pen;
/** Clipping Region (x,y) LT (x,y) RB */
ClipRect?: [[number, number], [number, number]];
}
/** [x, y] */
export type Point = [ number, number ];
export interface ActionCommon {
/** State */
s?: PlaybackDeviceContextState;
}
/** Draw Text */
export interface ActionText extends ActionCommon {
/** Action Type */
t: "text";
/** Text */
v: string;
/** Origin */
p?: Point;
}
/** Draw Polygon (shape with stroke/fill) / Polyline (stroke only) */
export interface ActionPoly extends ActionCommon {
/** Action Type */
t: "poly";
/** Points */
p: Point[];
/** Polygon (true) or Polyline (false) */
g: boolean;
}
export interface ActionRaster {
/** Raster Operaton 2.1.1.31 */
rop?: number;
}
export interface ActionCpy extends ActionCommon, ActionRaster {
t: "cpy";
/** Source [[X, W], [Y, H]] */
src: [[number, number], [number, number]];
dst: Point;
data?: any;
}
export interface ActionStr extends ActionCommon, ActionRaster {
t: "str";
/** Source [[X, W], [Y, H]] */
src: [[number, number], [number, number]];
/** Dest [[X, W], [Y, H]] */
dst: [[number, number], [number, number]];
data?: any;
}
export type Action = ActionText | ActionPoly | ActionCpy | ActionStr;
const parse_emf = (data: PreppedBytes): void => {
//try { require("fs").writeFileSync("out.emf", data); } catch(e) {}
}
/* 2.2.2.9 */
const parse_dib = (data: PreppedBytes) => {
if(data.length == 0) return null;
prep_blob(data, 0);
/* DIBHeaderInfo */
const HeaderSize = data.read_shift(4);
let Width = 0, Height = 0, Planes = 0, BitCount = 0;
let Compression = 0, ImageSize = 0, XPelsPerMeter = 0, YPelsPerMeter = 0, ColorUsed = 0, ColorImportant = 0;
if(HeaderSize == 0x0C) {
Width = data.read_shift(2);
Height = data.read_shift(2);
} else {
Width = data.read_shift(4, 'i');
Height = data.read_shift(4, 'i');
}
Planes = data.read_shift(2);
BitCount = data.read_shift(2);
const out: object = {
Width,
Height,
BitCount,
};
if(HeaderSize != 0x0C) {
Compression = data.read_shift(4);
ImageSize = data.read_shift(4);
XPelsPerMeter = data.read_shift(4, 'i');
YPelsPerMeter = data.read_shift(4, 'i');
ColorUsed = data.read_shift(4);
ColorImportant = data.read_shift(4);
out["Compression"] = Compression;
if(BitCount == 24 && ImageSize > Height * 3 * Width) Width = out["Width"] = ImageSize / (Height * 3);
}
/* Colors */
/* BitmapBuffer */
if(ImageSize == data.length - data.l) {
out["ImageData"] = data.slice(data.l, data.length);
prep_blob(out["ImageData"], 0);
}
return out;
}
const add_to_objects = (objects: PlaybackDeviceContextState[], obj: PlaybackDeviceContextState): void => {
let found = false;
for(var i = 0; i < objects.length; ++i) if(!objects[i]) { objects[i] = obj; found = true; }
if(!found) objects.push(obj);
}
export const get_actions_prepped_bytes = (data: PreppedBytes): Action[] => {
const out: Action[] = [];
/* 2.3.22 META_HEADER */
// Type (2 bytes) must be 1 or 2
let h = data.read_shift(2);
if(h != 1 && h != 2) throw `Header: Type ${h} must be 1 or 2`;
// HeaderSize expected to be 9
if((h = data.read_shift(2)) != 9) throw `Header: HeaderSize ${h} must be 9`;
// Version (2 bytes) 1 or 3
h = data.read_shift(2);
if(h != 0x0100 && h != 0x0300) throw `Header: Version ${h} must be 0x0100 or 0x0300`;
// SizeLow
// SizeHigh
// #Objects
// MaxRecord
// NumberOfMembers
data.l = 18;
let rt = 0;
/* used for EMF */
let escapecnt = 0;
let CommentRecordCount = 0;
let RemainingBytes = 0;
let EnhancedMetafileDataSize = 0;
let bufs: RawBytes[] = [];
let objects: PlaybackDeviceContextState[] = [];
let states: PlaybackDeviceContextState[] = [];
let state: PlaybackDeviceContextState = {};
let sidx = -1;
while(data.l < data.length) {
h = data.read_shift(4);
const end = data.l + h*2 - 4;
rt = data.read_shift(2);
let Record = WMFRecords[rt];
if(rt == 0x0000) break; // META_EOF
switch(rt) {
case 0x0626: { // META_ESCAPE
const EscapeFunction = data.read_shift(2);
const Escape = WMFEscapes[EscapeFunction];
//console.log("::", Escape);
/* 2.3.6 */
switch(EscapeFunction) {
case 0x000F: { // META_ESCAPE_ENHANCED_METAFILE
const ByteCount = data.read_shift(2);
let tmp = data.read_shift(4);
if(tmp != 0x43464D57) throw `Escape: Comment ID 0x${tmp.toString(16)} != 0x43464D57`;
tmp = data.read_shift(4);
if(tmp != 0x00000001) throw `Escape: Comment Type 0x${tmp.toString(16)} != 0x00000001`;
tmp = data.read_shift(4);
if(tmp != 0x00010000) throw `Escape: Version 0x${tmp.toString(16)} != 0x00010000`;
const Checksum = data.read_shift(2);
data.l += 4; // Flags
if(escapecnt == 0) {
CommentRecordCount = data.read_shift(4); // total number of records
} else {
const _CommentRecordCount = data.read_shift(4);
if(_CommentRecordCount != CommentRecordCount) throw `Escape: CommentRecordCount ${_CommentRecordCount} != ${CommentRecordCount}`;
}
const CurrentRecordSize = data.read_shift(4); // size of this record
const _RemainingBytes = data.read_shift(4);
if(escapecnt > 0 && CurrentRecordSize + _RemainingBytes != RemainingBytes) throw `Escape: ${RemainingBytes} != ${CurrentRecordSize} + ${_RemainingBytes}`;
RemainingBytes = _RemainingBytes;
const _EnhancedMetafileDataSize = data.read_shift(4);
if(escapecnt == 0) {
if(_EnhancedMetafileDataSize != CurrentRecordSize + _RemainingBytes) throw `Escape: ${_EnhancedMetafileDataSize} != ${CurrentRecordSize} + ${_RemainingBytes}`;
EnhancedMetafileDataSize = _EnhancedMetafileDataSize;
} else if(EnhancedMetafileDataSize != _EnhancedMetafileDataSize) throw `Escape: ${EnhancedMetafileDataSize} != ${_EnhancedMetafileDataSize}`;
if(ByteCount != (end - data.l) + 34) throw `Escape: Sizes ${ByteCount} != ${end - data.l} + 34`
if(end - data.l != CurrentRecordSize) throw `Escape: CRSize ${CurrentRecordSize} != ${end - data.l}`;
bufs.push(data.slice(data.l, end));
++escapecnt;
if(escapecnt == CommentRecordCount) {
const prepped: PreppedBytes = bconcat(bufs) as PreppedBytes;
prep_blob(prepped, 0);
parse_emf(prepped);
}
} break;
default: throw `Escape: Unrecognized META_ESCAPE Type 0x${EscapeFunction.toString(16)}`;
}
} break;
// #region 2.3.1 Bitmap Record Types
case 0x0940: { // 2.3.1.2 META_DIBBITBLT
const has_bitmap = h != (rt>>8)+3;
const RasterOperation = data.read_shift(4);
const YSrc = data.read_shift(2, "i");
const XSrc = data.read_shift(2, "i");
if(!has_bitmap) data.l += 2;
const Height = data.read_shift(2, "i");
const Width = data.read_shift(2, "i");
const YDest = data.read_shift(2, "i");
const XDest = data.read_shift(2, "i");
const res: ActionCpy = {
t: "cpy",
src: [[XSrc, Width], [YSrc, Height]],
dst: [XDest, YDest],
rop: RasterOperation,
s: Object.assign({}, state)
};
if(has_bitmap) {
const DIB = parse_dib(data.slice(data.l, end) as PreppedBytes);
res.data = DIB;
}
out.push(res);
} break;
case 0x0B41: { // 2.3.1.3 META_DIBSTRETCHBLT
const has_bitmap = h != (rt>>8)+3;
const RasterOperation = data.read_shift(4);
const SrcHeight = data.read_shift(2, "i");
const SrcWidth = data.read_shift(2, "i");
const YSrc = data.read_shift(2, "i");
const XSrc = data.read_shift(2, "i");
if(!has_bitmap) data.l += 2;
const DestHeight = data.read_shift(2, "i");
const DestWidth = data.read_shift(2, "i");
const YDest = data.read_shift(2, "i");
const XDest = data.read_shift(2, "i");
const res: ActionStr = {
t: "str",
src: [[XSrc, SrcWidth], [YSrc, SrcHeight]],
dst: [[XDest, DestWidth], [YDest, DestHeight]],
rop: RasterOperation,
s: Object.assign({}, state)
};
if(has_bitmap) {
const DIB = parse_dib(data.slice(data.l, end) as PreppedBytes);
res.data = DIB;
}
out.push(res);
} break;
// #endregion
// #region 2.3.3 Drawing Record Types
case 0x0A32: { // 2.3.3.5 META_EXTTEXTOUT
const Y = data.read_shift(2);
const X = data.read_shift(2);
const StringLength = data.read_shift(2);
const fwOpts = data.read_shift(2); // 2.1.2.2
if(fwOpts & 0x06) {
data.l += 8; // Rectangle 2.2.2.18 (for clipping/opaquing)
}
const str = data.read_shift(StringLength, 'cpstr');
if(data.l < end){/* TODO: Dx */}
out.push({t: "text", v: str, p: [X, Y], s: Object.assign({}, state)});
/* TODO!! */
} break;
case 0x0325: // 2.3.3.14 META_POLYLINE
case 0x0324: // 2.3.3.15 META_POLYGON
{
const nPoints = data.read_shift(2);
const points: Array<Point> = [];
for(let i = 0; i < nPoints; ++i) points.push([data.read_shift(2), data.read_shift(2)])
out.push({t: "poly", p: points, g: rt !== 0x0325, s: state});
} break;
case 0x0538: { // 2.3.3.16 META_POLYPOLYGON
const nPolygons = data.read_shift(2);
const polys: Array<Array<Point> > = [];
const szs: number[] = [];
/* 2.2.2.17 PolyPolygon */
for(let i = 0; i < nPolygons; ++i) szs[i] = data.read_shift(2);
for(let i = 0; i < szs.length; ++i) {
polys[i] = [];
for(let j = 0; j < szs[i]; ++j) polys[i].push([data.read_shift(2), data.read_shift(2)])
out.push({t: "poly", p: polys[i], g: true, s: state});
}
} break;
// #endregion
// #region 2.3.4 Object Record Types
case 0x02FC: { // 2.3.4.1 META_CREATEBRUSHINDIRECT
const obj: PlaybackDeviceContextState = {};
obj.Brush = {
Style: data.read_shift(2),
Color: data.read_shift(4),
Hatch: data.read_shift(2)
};
add_to_objects(objects, obj);
} break;
case 0x02FB: { // 2.3.4.2 META_CREATEFONTINDIRECT
const obj: PlaybackDeviceContextState = {};
obj.Font = {};
/* 2.2.1.2 Font TODO!! */
const Height = data.read_shift(2, "i");
const Width = data.read_shift(2, "i");
const Escapement = data.read_shift(2, "i");
const Orientation = data.read_shift(2, "i");
const Weight = data.read_shift(2, "i");
const Italic = !!data.read_shift(1);
const Underline = !!data.read_shift(1);
const StrikeOut = !!data.read_shift(1);
const CharSet = data.read_shift(1);
const OutPrecision = data.read_shift(1);
const ClipPrecision = data.read_shift(1);
const Quality = data.read_shift(1);
const PitchAndFamily = data.read_shift(1);
const Facename = data.read_shift(32, "cstr");
obj.Font.Name = Facename;
obj.Font.Height = Height;
obj.Font.Weight = Weight;
obj.Font.Italic = Italic;
obj.Font.Angle = Escapement / 10;
add_to_objects(objects, obj);
} break;
case 0x02FA: { // 2.3.4.5 META_CREATEPENINDIRECT
const obj: PlaybackDeviceContextState = {};
obj.Pen = {
Style: data.read_shift(2),
Width: data.read_shift(4) & 0xFF,
Color: data.read_shift(4)
};
add_to_objects(objects, obj);
} break;
case 0x01F0: { // 2.3.4.7 META_DELETEOBJECT
const ObjectIndex = data.read_shift(2);
//console.log("DELETE", ObjectIndex, objects[ObjectIndex]);
objects[ObjectIndex] = null;
} break;
case 0x012C: { // 2.3.4.9 META_SELECTCLIPREGION
const Region = data.read_shift(2);
//console.log("CLIPREGION", Region, objects[Region]);
//Object.assign(state, objects[Region]);
} break;
case 0x012D: { // 2.3.4.10 META_SELECTOBJECT
const ObjectIndex = data.read_shift(2);
//console.log("SELECT", ObjectIndex, objects[ObjectIndex]);
Object.assign(state, objects[ObjectIndex]);
// TODO!!
} break;
// #endregion
// #region 2.3.5 State Record Types
case 0x0416: // 2.3.5.3 META_INTERSECTCLIPRECT
state.ClipRect = [[0,0],[0,0]];
state.ClipRect[1][1] = data.read_shift(2);
state.ClipRect[1][0] = data.read_shift(2);
state.ClipRect[0][1] = data.read_shift(2);
state.ClipRect[0][0] = data.read_shift(2);
break;
case 0x0127: { // 2.3.5.10 META_RESTOREDC
const nSavedDC = data.read_shift(2, 'i');
state = states[sidx = (nSavedDC >= 0 ? nSavedDC : sidx + nSavedDC)];
} break;
case 0x001E: // 2.3.5.11 META_SAVEDC
states.push(state);
sidx = states.length - 1;
state = JSON.parse(JSON.stringify(state));
break;
case 0x0102: // 2.3.5.15 META_SETBKMODE
state.BkMode = data.read_shift(2);
break;
case 0x0103: // 2.3.5.17 META_SETMAPMODE
state.MapMode = data.read_shift(2);
break;
case 0x0106: // 2.3.5.20 META_SETPOLYFILLMODE
state.PolyFillMode = data.read_shift(2);
break;
case 0x0107: // 2.3.5.23 META_SETSTRETCHBLTMODE
state.StretchMode = data.read_shift(2);
break;
case 0x012E: // 2.3.5.24 META_SETTEXTALIGN
state.TextAlignmentMode = data.read_shift(2);
break;
case 0x0209: // 2.3.5.26 META_SETTEXTCOLOR
state.TextColor = data.read_shift(4);
break;
case 0x020C: // 2.3.5.30 META_SETWINDOWEXT
state.Extent = [0, 0];
state.Extent[1] = data.read_shift(2);
state.Extent[0] = data.read_shift(2);
break;
case 0x020B: // 2.3.5.31 META_SETWINDOWORG
state.Origin = [0, 0];
state.Origin[1] = data.read_shift(2);
state.Origin[0] = data.read_shift(2);
break;
// #endregion
default:
if(!Record) throw `Record: Unrecognized type 0x${rt.toString(16)}`;
console.log(Record);
}
data.l = end;
//if(rt != 0x0626) console.log(Record);
}
if(rt !== 0) throw `Record: Last Record Type ${rt} is not EOF type`;
return out;
}
export const image_size_prepped_bytes = (data: PreppedBytes): [number, number] => {
const origin: Point = [NaN, NaN], extents: Point = [NaN, NaN];
/* 2.3.22 META_HEADER */
// Type (2 bytes) must be 1 or 2
let h = data.read_shift(2);
if(h != 1 && h != 2) throw `Header: Type ${h} must be 1 or 2`;
// HeaderSize expected to be 9
if((h = data.read_shift(2)) != 9) throw `Header: HeaderSize ${h} must be 9`;
// Version (2 bytes) 1 or 3
h = data.read_shift(2);
if(h != 0x0100 && h != 0x0300) throw `Header: Version ${h} must be 0x0100 or 0x0300`;
data.l = 18;
let rt = 0;
while(data.l < data.length) {
h = data.read_shift(4);
const end = data.l + h*2 - 4;
rt = data.read_shift(2);
if(rt == 0x0000) break; // META_EOF
switch(rt) {
case 0x020C: // 2.3.5.30 META_SETWINDOWEXT
extents[1] = data.read_shift(2);
extents[0] = data.read_shift(2);
break;
case 0x020B: // 2.3.5.31 META_SETWINDOWORG
origin[1] = data.read_shift(2);
origin[0] = data.read_shift(2);
break;
}
data.l = end;
}
return [extents[0] - origin[0], extents[1] - origin[1]];
};

2
test/.gitignore vendored Normal file

@ -0,0 +1,2 @@
.cache
dist

17
test/fetch.html Normal file

@ -0,0 +1,17 @@
<html><body>
<style>
* {
padding: 0;
margin: 0;
}
</style>
<canvas id="canvas"></canvas>
<script src="wmf.js"></script>
<script>
(async() => {
const res = await fetch("static/image1.wmf");
const ab = await res.arrayBuffer();
WMF.draw_canvas(ab, document.getElementById("canvas"));
})();
</script>
</body></html>

21
test/filereader.html Normal file

@ -0,0 +1,21 @@
<html><body>
<style>
* {
padding: 0;
margin: 0;
}
</style>
<input type="file" id="file"><label for="file">Click here to select a file</label><br/>
<canvas id="canvas"></canvas>
<script src="wmf.js"></script>
<script>
document.getElementById("file").addEventListener("change", (e) => {
const files = e.target.files, f = files[0];
const reader = new FileReader();
reader.onload = (evt) => {
WMF.draw_canvas(evt.target.result, document.getElementById("canvas"));
};
reader.readAsArrayBuffer(f);
}, false);
</script>
</body></html>

20
test/node-canvas.js Normal file

@ -0,0 +1,20 @@
const fs = require("fs");
const { createCanvas, createImageData } = require("canvas");
const WMF = require("../");
/* WMF uses ImageData -- make it visible to the library */
global.ImageData = createImageData;
/* read data */
const data = fs.readFileSync(process.argv[2] || "./static/image1.wmf");
/* create canvas */
const size = WMF.image_size(data);
const canvas = createCanvas(size[0], size[1]);
/* do it! */
WMF.draw_canvas(data, canvas);
/* export to file */
const res = canvas.toBuffer("image/png");
fs.writeFileSync("out.png", res);

17
test/parcel.html Normal file

@ -0,0 +1,17 @@
<html><body>
<style>
* {
padding: 0;
margin: 0;
}
</style>
<canvas id="canvas"></canvas>
<script>
const urlparams = new URLSearchParams(window.location.search);
//window.MODE = "DIRECT"; // draw to an on-screen canvas
//window.MODE = "INDIRECT"; // draw to an orphan canvas and copy
//window.MODE = "OFFSCREEN"; // draw to an OffscreenCanvas and copy
window.MODE = urlparams.get("mode") || "OFFSCREEN";
</script>
<script src="./parcel.js"></script>
</body></html>

38
test/parcel.js Normal file

@ -0,0 +1,38 @@
import * as WMF from '../';
import * as fs from 'fs';
Buffer; // this line is required by Parcel to pull in the buffer shim
const data = fs.readFileSync("static/image1.wmf");
const domelt/*: HTMLCanvasElement*/ = document.getElementById("canvas")/* as HTMLCanvasElement*/;
const mode = window["MODE"] || "OFFSCREEN";
console.log(mode);
switch(mode) {
case "DIRECT": {
/* draw_canvas automatically resizes the canvas */
WMF.draw_canvas(data, domelt);
} break;
case "INDIRECT": {
const newelt = document.createElement("canvas");
WMF.draw_canvas(data, newelt);
/* the copy_canvas helper performs a resize of the new canvas */
copy_canvas(domelt, newelt);
} break;
case "OFFSCREEN": {
/* OffscreenCanvas requires the size beforehand */
const size = WMF.image_size(data);
const newelt = new OffscreenCanvas(size[0], size[1]);
WMF.draw_canvas(data, newelt);
copy_canvas(domelt, newelt);
} break;
}
function copy_canvas(dst, src) {
dst.height = src.height;
dst.width = src.width;
const ctxdst = dst.getContext('2d');
const ctxsrc = src.getContext('2d');
const imdata = ctxsrc.getImageData(0, 0, domelt.width, domelt.height);
ctxdst.putImageData(imdata, 0, 0);
}

1
test/wmf.js Symbolic link

@ -0,0 +1 @@
../dist/wmf.js

10
tsconfig.json Normal file

@ -0,0 +1,10 @@
{
"compilerOptions": {
"target": "es5",
"moduleResolution": "node",
"outDir": "./js",
"lib": [ "es5", "DOM" ],
"sourceMap": true,
"noImplicitReturns": true
}
}