parse-dds

parse-dds

Parses DDS texture headers in Node and the browser.

This was adapted from @toji's wonderful webgl-texture-utils.

Currently this only supports a limited range of common DDS formats:

• DXT1 (RGB)
• DXT3 (RGBA)
• DXT5 (RGBA)

See test/index.js for an example in Node, or demo/index.js for a WebGL compressed texture example.

Pull requests welcome.

Example

var parse = require('parse-dds')

var buffer = new Uint8Array(... DDS file ...)
var dds = parse(buffer)

console.log(dds.format)  // 'dxt1'
console.log(dds.shape)   // [ width, height ]
console.log(dds.images)  // [ ... mipmap level data ... ]

// get the compressed texture data for gl.compressedTexImage2D
var image = dds.images[0]
var texture = new Uint8Array(buffer, image.offset, image.length)

Install

npm install parse-dds --save-dev

Usage

dds = parse(arrayBuffer)

Parses an ArrayBuffer and returns the DDS headers for that file.

The returned values:

• shape an array representing the [ width, height ] of the texture
• flags the DDS bit flags stored in the file
• format a string, either 'dxt1', 'dxt3' or 'dxt5'
• images a list of information to extract sub-arrays for each mipmap level

Each image has the form:

{
  shape: [ width, height ], // size of this mipmap level
  offset: x,                // byte offset into the input buffer
  length: len,              // length of this mipmap level image data
}

License

MIT, see LICENSE.md for details.