FBMFormat

FBM (FLASH BitMap) is simplified version of SBM designed for images stored in flash memory.
This format does not support compression and embedded palettes.

Layout

• Header
• Pixel Data

Structures

File header

Fields are 32-bit aligned for fast access with 32-bit ARM MCU's

Delphi/Pascal

type
    TFBMHeader = packed record
        dwID: cardinal;
        dwFormat: cardinal;
        dwWidth: cardinal;
        dwHeight: cardinal;
        dwRowSize: cardinal;
        dwDataSize: cardinal;
    end;

C/C++

typedef struct _fbm_header {
    uint32_t dwId;
    uint32_t dwFormat;
    uint32_t dwWidth;
    uint32_t dwHeight;
    uint32_t dwRowSize;
    uint32_t dwDataSize;
} fbm_header_t;

where

• dwId - file identifier (4D424C46 in hex or "FLBM")
• dwFormat - bit depth/colorspace (see Color Formats)
• dwWidth - image width
• dwHeight - image height
• dwRowSize - row size in bytes
• dwDataSize - total pixel data size in bytes