Datamax-oneil PrintPAD AN-04 (LP) Manual de usuario descargar pdf

AN-04 (LP)

September 23, 2005

HOW TO PRINT BITMAP GRAPHICS IN LINE PRINTER MODE

This document describes how to print bitmapped graphics in Line Printer mode. Two other graphics mode are

available. One is RLE compressed graphics (see AN-05) and downloaded .PCX graphics printed from Easy Print (see

AN-09).

Using the ESC V n1n2 <data> to send graphics to be printed one

time (and not stored) is really extremely simple, and is

virtually identical to the way most graphic commands have worked on many different printers for years. It is used to

print a bitmap graphic on the fly, where the image is to be printed once and then discarded rather than to be stored and

printed again and again. The ESC V n1n2 precedes the actual bitmap data that forms the picture. The ESC V tells the

printer to enter a graphics mode, the n1n2 tells the printer how tall the graphics image is.

A bit map graphic is an image composed of individual bits in bytes, each bit rep

resenting a pixel (or picture element) in

the image, and the bytes laid end to end from left to right, then stacked, making up the image a series of very thin strips

going across the image from left to right and from top to bottom.

For example, if you look at the image bel

ow, you can see a diamond with a rectangle inside (you might need a little

imagination), composed of individual pixels each the size of one letter. We’ll let a space represent a white pixel, and an

X represent a black pixel:

XXXX

XXXXXXXX

XX XX

XX XXXX XX

XX XX

XXXXXXXX

XXXX

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AN-04 (LP) September 23, 2005 HOW TO PRINT BITMAP GRAPHICS IN LINE PRINTER MODE This document describes how to print bitmapped graphics in

To form this image digitally, we would make the black pixels (represented by X’s) a ONE bit and the white areas a ZERO bit: 00000000001111000

Now we are ready to print this image, which is 24 pixels wide and 10 pixels high. We’ll print it on an imaginary printer whose printhead is

2. Each pixel is represented as one dot on the printed image, therefore only black and white (one bit per pixel) is allowed 3. Bytes sent

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Datamax-oneil PrintPAD AN-04 (LP) Manual de usuario