png-info

Get information about a PNG from its headers

Install

npm install png-info

Usage

Most common lookups will have methods on pngInfo:

var image = fs.readFileSync('path/to/image.png');
var pngInfo = new PNGInfo(image);
var dimensions = pngInfo.getDimensions();
// {width: 100, height: 150 }
});

If you want to go deeper, you can access chunk data directly:

var image = fs.readFileSync('path/to/image.png');
var pngInfo = new PNGInfo(image);
var width = pngInfo.chunks.IHDR.width;
// 100

Status

Only IHDR is currently implemented, please feel free to add any other chunks that you need:

• [x] IHDR
• [ ] PLTE
• [ ] tRNS
• [ ] gAMA
• [ ] cHRM
• [ ] sRGB
• [ ] iCCP
• [ ] tEXt
• [ ] bKGD
• [ ] pHYs
• [ ] sBIT
• [ ] sPLT
• [ ] hIST
• [ ] tIME

Development

npm test

Please keep coverage at 100%