DataCard SR300 Manual do Utilizador descarregar pdf (Página 15)

SR200 & SR300 Printer SDK Guide

Page 11

Define LUT Function

No. Function Name Explanation

1 int CXCMD_DefineLUT

(int iSlot,int iID,

int iColor,

int iLength,

BYTE *pbyBuffer)

Change the look up table in the printer.

iColor Each color has its own look up table. Possible

values are 2 for C, 4 for M, 6 for Y. (0 for K is reserved

for printer use.)

iLength The length of LUT data in bytes.

From 0 to 256.

pbyBuffer LUT Data.

About Look Up Tables (LUT)

A look up table is a method of adjusting RBG color values. The value X in the

image data is replaced with LUT[X] value when it is printed.

LUT data is 256 bytes in length, and transforms the color being printed. Look up

table data in the printer is set to the default value whenever the printer is powered

on.

The printer has 4 look up tables, one for each color transformation. The following

table shows how LUT data transforms output.

Image Data

from Host

Byte Position

in LUT

Value of

LUT

Color actually

printed

0 → 0 0 → 0

1 → 1 2 → 2

2 → 2 5 → 5

: : : : : :

253 → 253 255 → 255

254 → 254 255 → 255

255 → 255 255 → 255

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 75 76

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