grunt-bpg

> Convert your images to the BPG format

Getting Started

This plugin requires bpgenc which is included in libbpg (libbpg is
also available in Homebrew).

In addition, this plugin also requires Grunt ~0.4.4

If you haven't used Grunt before, be sure to check out the Getting Started guide, as it explains how to create a Gruntfile as well as install and use Grunt plugins. Once you're familiar with that process, you may install this plugin with this command:

``shell
npm install grunt-bpg --save-dev
`

Once the plugin has been installed, it may be enabled inside your Gruntfile with this line of JavaScript:

`js
grunt.loadNpmTasks('grunt-bpg');
`

The "bpg" task

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In your project's Gruntfile, add a section named bpg to the data object passed into grunt.initConfig().

`js
grunt.initConfig({
bpg: {
options: {
// Task-specific options go here.
},
your_target: {
// Target-specific file lists and/or options go here.
},
},
});
`

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Run bgpenc -h for the full options.

#### options.binpath
Type: String
Default value: 'bpgenc'

The location to the bpgenc binary.

#### options.qp
Type: Number
Default value: 27

An integer value to use as the quantizer parameter. set quantizer
parameter (smaller gives better quality, range: 0-51, default = 28)

#### options.cfmt
Type: Number
Default value: 420

An integer value to use as the preferred chroma format (420, 422, 444, default=420)

#### options.color_space
Type: Number
Default value: 'ycbcr'

A string value to use as the preferred color space (ycbcr, rgb, ycgco, ycbcr_bt709, ycbcr_bt2020, default=ycbcr)

#### options.bit_depth
Type: Number
Default value: 8

An integer value to use as the bit depth (8 to 12, default = 8)

#### options.lossless
Type: Boolean
Default value: false

Enable lossless mode

#### options.encoder
Type: String
Default value: 'jctvc'

The HEVC encoder (jctvc)

#### options.compression_level
Type: Number
Default value: 8

The compression level (1=fast, 9=slow, default = 8)




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#### Default Options

`js
grunt.initConfig({
bpg: {
options: {},
files: [{
expand: true,
src: ['*/.{jpg,png}'],
cwd: 'assets/images',
dest: 'build/images'
}]
},
});
``

Contributing

In lieu of a formal styleguide, take care to maintain the existing coding style. Add unit tests for any new or changed functionality. Lint and test your code using Grunt.