Option attributes for the Resolution feature
> [!IMPORTANT] > The modern print platform is Windows' preferred means of communicating with printers. We recommend that you use Microsoft's IPP inbox class driver, along with Print Support Apps (PSA), to customize the print experience in Windows 10 and 11 for printer device development. > > For more information, see Modern print platform and the Print support app design guide.**
The following table lists the attributes associated with the Resolution feature. For more information about the Resolution feature, see Standard Features.
| Attribute name | Attribute parameter | Comments |
|---|---|---|
| *DPI | PAIR of numeric values representing the x and y values for the printer's resolution, in dots per inch. | Required. The x and y values must equal *TextDPI x and y values, or they must be equal to *TextDPI x and y values divided by a power of two. For example, if *TextDPI is PAIR(300, 300), then *DPI values might be PAIR(300, 300), PAIR(150, 150), or PAIR(75, 75), but not PAIR(100, 100). |
| *MinStripBlankPixels | Numeric value representing the minimum number of blank bytes that Unidrv should encounter within a scan line before stripping enclosing blank bytes. | Optional. If not specified, the default value is zero. This attribute is relevant only if a *StripBlanks entry specifies ENCLOSED. For more information, see Raster Data Emission Attributes. |
| *PinsPerLogPass | Numeric value presenting the number of scan lines printed by one logical pass of the print head. Must be a multiple of *PinsPerPhysPass, since each logical pass consists of one or more physical passes. | Optional. If not specified, the default value is 1. Required if a printer performs interlacing, requiring multiple passes of the print head across a set of scan lines, to print all the scan lines. |
| *PinsPerPhysPass | Numeric value representing the number of scan lines printed as the print head moves across the page. Must be one, or a multiple of eight. | Optional. If not specified, the default value is 1. The horizontal and vertical resolutions should be multiples of *PinsPerPhysPass, or the output might be unpredictable. |
| *RequireUniDir? | TRUE or FALSE, indicating whether the specified resolution requires unidirectional printing to be enabled. | Optional. If not specified, the default value is FALSE. |
| *SpotDiameter | Numeric value representing the spot diameter size, as a percentage of the pixel size, for the resolution specified by *DPI. | Required. Examples: 100 means the spot diameter equals the pixel size. 200 means the spot diameter is twice the pixel size. 50 means the spot diameter is half the pixel size. |
| *TextDPI | PAIR or numeric values representing the x and y values for the printer's text resolution, in dots per inch. | Required. See *DPI comments. This resolution is used for drawing fonts and vector graphics. |
For information about additional option attributes, see Option Attributes for All Features.
Also, see Controlling Image Quality.