Wireless Application Protocol Bitmap Format

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Wireless Bitmap
Filename extension .wbmp
Internet media type image/vnd.wap.wbmp
Developed by WAP Forum
Type of format Image file formats

Wireless Application Protocol Bitmap Format (shortened to Wireless Bitmap and with file extension .wbmp) is a monochrome graphics file format optimized for mobile computing devices.

WBMP images are monochrome (black & white) so that the image size is kept to a minimum. A black pixel is denoted by 0 and a white pixel is denoted by 1.

Format of Wireless Bitmap Files[edit]

Field name Field type Size (in bytes) Purpose
Type uintvar variable Type of the image, and is 0 for monochrome bitmaps.
Fixed header byte 1 Reserved. Always 0.
Width uintvar variable Width of the image in pixels.
Height uintvar variable Height of the image in pixels.
Data byte array variable Data bytes arranged in rows – one bit per pixel. A black pixel is denoted by 0 and a white pixel is denoted by 1. Where the row length is not divisible by 8, the row is 0-padded to the byte boundary.

Notes[edit]

External links[edit]