Inside Macintosh: QuickDraw GX Printing /

Chapter 4 - Advanced Printing Features / Advanced Printing Features Reference

Constants and Data Types for Advanced Printing Features

Text Job Format (Direct) Mode

QuickDraw GX provides a text job format mode, sometimes called a direct mode, to format a document to optimize for particular features and capabilities of a device. For example, text mode provides a fast way to print text using the built-in fonts on a device. This feature provides a replacement for draft printing, which was available in previous versions of the printing architecture.

QuickDraw GX defines query types in the query type enumeration to be used with the gxQueryType data type:

enum {
   /* query types */
   gxGetJobFormatLineConstraintQuery   = (gxQueryType)  0,
   gxGetJobFormatFontsQuery            = (gxQueryType)  1,
   gxGetJobFormatFontCommonStylesQuery = (gxQueryType)  2,
   gxGetJobFormatFontConstraintQuery   = (gxQueryType)  3,
   gxSetStyleJobFormatCommonStyleQuery = (gxQueryType)  4
};

typedef long gxQueryType;

Constant descriptions

gxGetJobFormatLineConstraintQuery

Used to determine line constraint characteristics.

gxGetJobFormatFontsQuery

Used to determine font information.

gxGetJobFormatFontCommonStylesQuery

Used to determine the style name, such as "normal" or "bold."

gxGetJobFormatFontConstraintQuery

Used to determine font positioning constraints.

gxSetStyleJobFormatCommonStyleQuery

Used to set style contents.

QuickDraw GX defines constraint ranges for the constraint table in the constraint range enumeration:

enum { gxConstraintRange = -1 };

QuickDraw GX stores constraint information in the position constraint table information structure:

struct gxPositionConstraintTable {
   gxPoint  phase;               
   gxPoint  offset;              
   long     numSizes;            
   Fixed    sizes[1];            
};

Field Description

phase

Where to start from the upper-left corner of the page.

offset

The distance between legal character positions.

numSizes

The number of sizes.

sizes[1]

An array of sizes.

QuickDraw GX stores style information in the style name table information structure:

struct gxStyleNameTable{
   long     numStyleNames;    
   Str255   styleNames[1];    
};

Field Description

numStyleNames

The number of style names.

styleNames[1]

An array of strings containing any number of style names.

QuickDraw GX stores font information in the font table information structure:

struct gxFontTable {
   long     numFonts;      
   gxFont   fonts[1];      
};

Field Description

numFonts

The number of fonts.

fonts

An array of fonts.

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