User guide

Sixel Graphics Considerations on the LA75 Plus Companion Printer
6.1 Graphics Resolution
Table 6–2 shows the horizontal grid size (HGS) and vertical grid size (VGS)
fallbacks relative to the requested horizontal grid size and the aspect ratio.
The printer attempts to preserve the requested aspect ratio without exceeding
the requested horizontal grid size (as defined by Pn3 of the protocol selector).
The aspect ratio is provided by Ps1 or Set Raster Attributes (DECGRA).
First the printer ensures that the aspect ratio is one of the supported values
(1:1, 2:1, 2.5:1):
• If aspect ratio is less than 1.5:1, fall back to 1:1
• If aspect ratio is greater than or equal to 1.5:1 and less than 2.25:1, fall
back to 2:1
• If aspect ratio is greater than or equal to 2.25:1, fall back to 2.5:1
Then the printer computes the HGS and VGS values that best match the
aspect ratio and requested Pn3 value.
6–2 Sixel Graphics Considerations on the LA75 Plus Companion Printer