| 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.
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Transcription
Format of Wireless Bitmap Files
| 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. The pixel order within a byte is MLP (most left pixel) = MSB (most significant bit). Where the row length is not divisible by 8, the row is 0-padded to the byte boundary. |
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This page was last edited on 28 March 2022, at 07:30