Sun Raster

File Format
Name	Sun Raster
Ontology	Electronic File Formats Graphics Sun Raster
Extension(s)	.sun, .ras, .rast, .rs, .sr, .scr, .im1, .im8, .im24, .im32
PRONOM	x-fmt/184
Released	≤1989

Sun Raster, or Sun Rasterfile, is an image file format associated with Sun operating systems. It supports grayscale, paletted, and full color images. Images may be uncompressed, or use RLE compression.

Format details

Files have a fixed 32-byte header, followed by an optional color palette, followed by the image data.

Identification

Files begin with signature bytes 59 a6 6a 95.

Specifications

• http://www.fileformat.info/format/sunraster/spec/index.htm
• http://www.martinreddy.net/gfx/2d/RAS.txt
• https://hg.java.net/hg/solaris-x11~x-s12-clone/file/b0bfd498768f/open-src/data/rasterfile/sun-src

Software

• Konvertor
• Netpbm: pnmtorast, rasttopnm
• ImageMagick (format named "RAS" or "SUN")
• Tom's Viewer
• FFmpeg
• XnView
• abydos

Sample files

• http://samples.libav.org/image-samples/sunrast/ (Caution: 32bpp.ras dated 2012 has color channels in the wrong order.)
• dexvert samples — image/sunRaster

Resources

• Sun Raster File Format Summary, from the Encyclopedia of Graphics File Formats
• MultimediaWiki article
• Wikipedia: Sun Raster