TransAct Ithaca 280, Руководство программиста

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Programming Codes iTherm
®
280 Programmer’s Guide
28-04430 Rev K Page 115
Graphic Mode
The iTherm
®
280 Printer conforms to the basic definition of IBM all-points-addressable
(APA) graphic commands. It is not designed to print large quantities of graphical data.
The printer only prints graphics that are 2.5 inches wide. At this time, there is not a
graphics mode for Epson emulation.
The iTherm
®
280 Printer always prints in one of the native resolutions of 104 x 96, 208 x
96, 104 x 192, or 208 x 192 dpi. To provide compatibility with the standard IBM APA
resolutions, the printer internally modifies the graphics to print as expected. The printer
converts the vertical resolution by altering the [ESC] J command (which is typically used
for vertical spacing) and adjusting it so that horizontal passes touch as expected. The
requested horizontal resolution is converted by data scaling. Because the vertical dpi of
the printer is always greater, the resulting APA graphics printed on the iTherm
®
280
Printer are slightly smaller than the same graphic printed on an impact printer. All of this
is done transparently to the application; however, loss of resolution may result in some
modes. If desired the [ESC] * <m> command can be used to select the native resolution.
Note 1: If the iTherm
®
280 Printer is used with programs that convert text
to graphics, the printer is slower than if the printer is sent ASCII text. The
iTherm
®
280
Printer is supported by a Windows‘ print driver that allows
applications to select supported fonts.
Note 2: Generally, the horizontal graphic commands provide faster print
than the APA graphic commands.
Standard APA Graphics
[ESC] K Print single-density graphics (60h x 72v dpi)
ASCII [ESC] K <n
1
> <n
2
>
Hexadecimal 1BH 4BH <n
1
> <n
2
>
Decimal <27> <75> <n
1
> <n
2
>
IPCL none
Description The [ESC] K <n
1
> <n
2
> command prints <n
1
> + 256 * <n
2
> bytes of
single-density graphics (60 dpi).
[ESC] L Print half-speed double-density graphics (120h x 72v dpi)
ASCII [ESC] L <n
1
> <n
2
>
Hexadecimal 1BH 4CH <n
1
> <n
2
>
Decimal <27> <76> <n
1
> <n
2
>
IPCL none
Description The [ESC] L <n
1
> <n
2
> command prints <n
1
> + 256 * <n
2
> bytes of
double-density graphics (120 dpi) at half speed, allowing full and half dots
to be printed.