Inside Macintosh: QuickDraw GX Printing Extensions and Drivers /

Chapter 4 - Printing Messages / Printing Messages Reference

Constants and Data Types for the Raster Imaging System

Raster Package Structure

The raster package structure, of data type gxRasterPackageRec, is used to define how raster data is packaged into a buffer for sending to the output device.

struct gxRasterPackageRec {
   Ptr                     bufferSize;
   short                   colorPasses;
   short                   headHeight;
   short                   numberPasses;
   short                   passOffset;
   gxRasterPackageOptions  packageOptions;
};
typedef struct gxRasterPackageRec gxRasterPackageRec, 
*gxRasterPackagePtr, **gxRasterPackageHdl;

Field Description

bufferSize

The number of bytes in the raster packaging buffer.

colorPasses

The number of print-head passes required to print all colors.

headHeight

The height of the print head in pixels.

numberPasses

The number of passes required per headheight.

passOffset

The offset between passes in pixels.

packageOptions

The packaging options, as defined in the next section.

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