Some fixes, some mods

[dangreen]

Fixes

1. source parameter as argument

In documentation we can see:

or array of { size: filepath }

but according to the code it should be map, not array:

{ [size]: [filepath] }

Now source can be array of paths. And better to use sizeOf function instead of:

sourceset.push({
    size: { width: size, height: size, type: 'png' },
    file: buffer
});

2. Firefox icon

Overlay should be behind main icon.
Icon from RFG:

Before (without offset):

After (with offset):

3. HTML tags from RFG

Before:

html: [ '<link rel="apple-touch-icon" sizes="57x57" href="/apple-touch-icon-57x57.png">\n<link rel="apple-touch-icon" sizes="60x60" href="/apple-touch-icon-60x60.png">\n<link rel="apple-touch-icon" sizes="72x72" href="/apple-touch-icon-72x72.png">\n<link rel="apple-touch-icon" sizes="76x76" href="/apple-touch-icon-76x76.png">\n<link rel="apple-touch-icon" sizes="114x114" href="/apple-touch-icon-114x114.png">\n<link rel="apple-touch-icon" sizes="120x120" href="/apple-touch-icon-120x120.png">\n<link rel="apple-touch-icon" sizes="144x144" href="/apple-touch-icon-144x144.png">\n<link rel="apple-touch-icon" sizes="152x152" href="/apple-touch-icon-152x152.png">\n<link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon-180x180.png">\n<link rel="icon" type="image/png" href="/favicon-32x32.png" sizes="32x32">\n<link rel="icon" type="image/png" href="/favicon-230x230.png" sizes="230x230">\n<link rel="icon" type="image/png" href="/android-chrome-192x192.png" sizes="192x192">\n<link rel="icon" type="image/png" href="/coast-228x228.png" sizes="228x228">\n<link rel="icon" type="image/png" href="/favicon-16x16.png" sizes="16x16">\n<link rel="manifest" href="/manifest.json">\n<link rel="yandex-tableau-widget" href="/yandex-browser-manifest.json">\n<meta name="theme-color" content="#0030d9">' ] }

After:

html: 
   [ '<link rel="apple-touch-icon" sizes="57x57" href="/apple-touch-icon-57x57.png">',
     '<link rel="apple-touch-icon" sizes="60x60" href="/apple-touch-icon-60x60.png">',
     '<link rel="apple-touch-icon" sizes="72x72" href="/apple-touch-icon-72x72.png">',
     '<link rel="apple-touch-icon" sizes="76x76" href="/apple-touch-icon-76x76.png">',
     '<link rel="apple-touch-icon" sizes="114x114" href="/apple-touch-icon-114x114.png">',
     '<link rel="apple-touch-icon" sizes="120x120" href="/apple-touch-icon-120x120.png">',
     '<link rel="apple-touch-icon" sizes="144x144" href="/apple-touch-icon-144x144.png">',
     '<link rel="apple-touch-icon" sizes="152x152" href="/apple-touch-icon-152x152.png">',
     '<link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon-180x180.png">',
     '<meta name="apple-mobile-web-app-capable" content="yes">',
     '<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">',
     '<meta name="apple-mobile-web-app-title">',
     '<link rel="icon" type="image/png" sizes="228x228" href="/coast-228x228.png">',
     '<link rel="yandex-tableau-widget" href="/yandex-browser-manifest.json">',
     '<link rel="icon" type="image/png" sizes="32x32" href="/favicon-32x32.png">',
     '<link rel="icon" type="image/png" sizes="192x192" href="/android-chrome-192x192.png">',
     '<link rel="icon" type="image/png" sizes="16x16" href="/favicon-16x16.png">',
     '<link rel="shortcut icon" href="/favicon.ico">',
     '<link rel="manifest" href="/manifest.json">',
     '<meta name="mobile-web-app-capable" content="yes">',
     '<meta name="theme-color" content="#0030d9">',
     '<meta name="application-name">' ] }

4. Offset fix

• I also fixed some troubles with offset in firefox icon.
• Now offset size should be calculated right.

5. Convert color to HEX for RFG

RFG throws error if color is not in HEX format. Now color converts to HEX.

Mods

1. Partial offline SVG support

Now if sourceset contains SVG source, new image will be generated instead of resizing PNG source.
Before (from 512x512 PNG):

After (from SVG):

2. Offsets with RFG

Now offset parameters will be applied to the RFG request.

3. Platform options

Certain parameters can be applied for certain platforms. This rules are described in config/platform-options.json. For now it has only one parameter, but in near future I can add some parameters from RFG, which will be available only with online: true.

4. Prefer online option

If preferOnline option is setted to true and online generation was failed, then icons will be generated offline.

[haydenbleasel]

Nice work!