Epson ESC Manuale Utente Scaricare il pdf (Pagina 77)

A-75

Byte 4:

- Bit 7, 6 Graphic character description:

: shading character

: line drawing character

: underscored character

: not supported

All graphics characters are 30 dot high. An underscored character is defined

as a blank graphic (all zeros) and it is automatically generated by the printer.

A shading character repeats dots 1-6 of each column as dots 25 through 30

respectively. A line drawing character repeats dots 23 and 24 as the pairs 25

and 26, 27 and 28, 29 and 30.

- Bit 5 to 0 The number of dot columns of the character shape minus one. For example: the

character width of Draft generator is 10 dots and bit 5 to 0 must be set to 9.

- Bit 5 to 9 Compression mask description. It is used to optimize the memory occupation

and it is based on the concept that a dot column on its left is not stored. You

can calculate the compression mask of a character only after designing the

entire character. Every bit is associated with a dot column with the bit 7 of

byte 5 associated with the leftmost column. The bit is set to {1}, if the column

is equal to the preceding one; otherwise, it is set to {0}. If the character is

longer than 39 dot columns the remaining dot columns must be stored

without compression. The bit 40 (bit 0 of byte 9) must be 0. If no compression

is present in the character, byte 5 to 9 is composed by all zeros.

If you wish to copy an entry over another entry so that two characters with the same

characteristics and different code are present in the same look up table, the DLL

sequence ESC = n m id p t has the following meaning:

1 2 ... 72 73 74 75 76 77 78 79 80 81 82 ... 287 288

Nessun commento

Epson ESC Manuale Utente Pagina 77