struct { unsigned_32bit x_res; /* 1st four bytes; big endian */ unsigned_32bit y_res; /* 2nd four bytes; big endian */ } Sets the scanning resolution. The x and y resolutions in this object are in fixed-point with 16 bits of fraction, and 16 bits of integer, and are in dots per inch. X is horizontal; Y is vertical. Examples of computing x_res and y_res: 300 dots/inch:round(300 * 65536) = 19660800 16 dots/mm: round(16 * 25.4 * 65536) = 26633830. If the device does not support the given combination, then it'll select the nearest supported values in a device-dependent manner (documented in the POS). Additional information: The 4-pack device will support only: 100, 150, 200, 300 and 600. The Host SW may scale the image to many more resolutions. If an invalid resolution setting is passed to the device or the setting is greater than the max value(600ppi), the device will set the resolution to the default value. If the resolution setting is not 100, 150, 200, 300 or 600, the value is snapped up. For instance, if the value is < 100, the resolution is snapped to 100. If the value is between 101-149, the value is snapped to 150, etc. NOTE: The last 16 bits of the horizontal and vertical settings are ignored. Only the first 16 bits of the horizontal and vertical resolution setting are used.