Inside Macintosh: QuickDraw GX Graphics /

Chapter 5 - Bitmap Shapes / Bitmap Shapes Reference

Constants and Data Types

Constants For Bitmaps With Disk-Based Pixel Images

QuickDraw GX provides two constants for you to use when creating bitmaps with disk-based pixel images.

#define  gxBitmapFileAliasImageValue   0x00000001
#define  gxBitmapFileAliasTagType      'bfil'

You indicate that a bitmap uses a disk-based pixel image by setting the bitmap geometry's image field to the gxBitmapFileAliasImageValue constant. You specify which file contains the pixel image in a bitmap data source alias structure, which you attach to the bitmap using a tag with the gxBitmapFileAliasTagType tag type.

For an example of a bitmap with a disk-based pixel image, see "Creating Bitmaps With Disk-Based Pixel Images" beginning on page 5-44.

Main | Page One | What's New | Apple Computer, Inc. | Find It | Contact Us | Help