Dialogic COMMON-ISDN-API Podręcznik referencyjny - Strona 9
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Drukuj stronęB.2.2 Page header
Parameter
PageHeaderID
PageHeaderLen
Resolution Vertical
Resolution Horizontal
Coding
reserved
Type
Comment
byte
254 (Page data record type)
byte
0: Document end
1...255: byte offset of first page data from the Resolution
Vertical field of the page header. This value is normally equal
to the size of the remainder of the header (0x10), but there
could be additional user-specific data between page header
and page data. COMMON-ISDN-API ignores and does not
provide such additional data.
byte
Definition of vertical resolution; different resolutions in one
document may be ignored by COMMON-ISDN-API
0: 98 lpi (standard)
1:: 196 lpi (high resolution)
2...254: reserved
255: end of document (should not be used: PageHeaderLen
should be coded 0 instead)
If FAX paper formats and resolutions are enabled
0x00: 98 lpi (3.85 lines per millimeter)
0x01: 196 lpi (7.7 lines per millimeter)
0x02..0x7f: reserved
0x80: reserved
0x81: 100 lpi
0x82: reserved
0x83: 200 lpi
0x84: reserved
0x85: 300 lpi
0x86: 392 lpi (15.4 lines per millimeter)
0x87: 400 lpi
0x88..0x8a: reserved
0x8b: 600 lpi
0x8c..0x8e: reserved
0x8f: 800 lpi
0x90..0x96: reserved
0x97: 1200 lpi
0x98..0xff: reserved
byte
Definition of horizontal resolution
0: 203 dpi (standard)
1...255: reserved
If FAX paper formats and resolutions is enabled
0x00: 203 dpi (R8, 8 pels per millimeter)
0x01..0x7f: reserved
0x80: reserved
0x81: reserved
0x82: reserved
0x83: 200 dpi
0x84: reserved
0x85: 300 dpi
0x86: 406 dpi (R16, 16 pels per millimeter)
0x87: 400 dpi
0x88..0x8a: reserved
0x8b: 600 dpi
0x8c..0x96: reserved
0x97: 1200 dpi
0x98..0xff: reserved
byte
Definition of pixel line coding
0: modified Huffman coding
1...255: reserved
byte
Coded as 0
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