The PostScript Preferences ('pdip') Resource(IM:XP)

Inside Macintosh: QuickDraw GX Printing Extensions and Drivers /

Chapter 6 - Printing Resources / Printing Resources Reference

Resources Used Only in Printer Drivers

The PostScript Preferences ('pdip') Resource
The PostScript preferences ('pdip') resource, of type gxPostscriptPrefsType, is used with PostScript drivers to specify information about a specific PostScript device. This resource is optional.
Figure 6-33 shows the structure of a PostScript preferences resource.
Figure 6-33 PostScript preferences resource

The PostScript preferences resource describes a number of attributes of the printer:

Language level. The PostScript language level supported by the printer.
Device color space. The color space supported by the printer. The color-space value constants are shown in the chapter "Colors and Color-Related Objects" in Inside Macintosh: QuickDraw GX Objects. The values that are valid for this field are gxGraySpace, gxCMYKSpace, and gxRGBSpace.
Render options. Rendering options for the PostScript printer. This value is the combined value of the constants you that you include from the choices shown in
Table 6-38.
Path limit. The largest number of points that can be active in the device during the imaging process.
Gsave limit. The greatest number of gsaves that can be performed on the device.
Operand stack limit. The maximum number of objects that can be placed in the stack at any one time.
Font types. The stream types that the imaging system needs to use when downloading a font. The possible values are shown in Table 6-39.
Printer memory. The amount of memory available in the printer.

Table 6-38 shows the constants that you can use to define the render options field of the PostScript preferences resource.
PostScript render options (Continued)
Constant Value Explanation
gxNeedsAsciiOption 1 The driver needs to convert all binary data to 7-bit ASCII values.
gxNeedsCommentsOption 2 The driver needs to issue PostScript comments.
gxBoundingBoxesOption 4 The driver needs to calculate values for the %%BoundingBox: and %%PageBoundingBox: variables. This option implies the gxNeedsCommentsOption constant.
gxPortablePostScriptOption 8 The driver needs to generate PostScript that is not device specific.
gxUseLevel2ColorOption 128 The driver is to use Level 2 device-independent color when printing to a Level 2 output device.

Table 6-39 shows the values that you can specify in the font types field of the PostScript preferences resource.
Table 6-39 Font stream types
Constant Value Explanation
trueTypeStreamType 0x0001 TrueType font format
type1StreamType 0x0002 PostScript Type 1 font format
type3StreamType 0x0004 PostScript Type 3 font format
type42StreamType 0x0008 PostScript Type 4.2 font format
type42GXStreamType 0x0010 GX PostScript Type 4.2 font format
portableStreamType 0x0020 Portable font format
flattenedStreamType 0x0040 Flattened font format

PostScript render options (Continued)
Constant	Value	Explanation
gxNeedsAsciiOption	1	The driver needs to convert all binary data to 7-bit ASCII values.
gxNeedsCommentsOption	2	The driver needs to issue PostScript comments.
gxBoundingBoxesOption	4	The driver needs to calculate values for the `%%BoundingBox:` and `%%PageBoundingBox:` variables. This option implies the `gxNeedsCommentsOption` constant.
gxPortablePostScriptOption	8	The driver needs to generate PostScript that is not device specific.
gxUseLevel2ColorOption	128	The driver is to use Level 2 device-independent color when printing to a Level 2 output device.

**Table 6-39 Font stream types**
Constant	Value	Explanation
trueTypeStreamType	0x0001	TrueType font format
type1StreamType	0x0002	PostScript Type 1 font format
type3StreamType	0x0004	PostScript Type 3 font format
type42StreamType	0x0008	PostScript Type 4.2 font format
type42GXStreamType	0x0010	GX PostScript Type 4.2 font format
portableStreamType	0x0020	Portable font format
flattenedStreamType	0x0040	Flattened font format