Data-Unloading Functions(IM:Q)

Chapter 3 - Image Compression Manager / Image Compression Manager Reference

Data-Unloading Functions
Compressors use the data-loading and data-unloading functions when working with images that do not fit into the computer's memory. The data-unloading function writes compressed data to a storage device during a compression operation.
The FlushProcPtr data type defines a pointer to a data-unloading function.
/* data-unloading structure */
typedef struct FlushProcRecord FlushProcRecord;
typedef FlushProcRecord *FlushProcRecordPtr;
You assign a data-unloading function to an image or a sequence by passing a pointer to a structure that identifies the function to the appropriate compression function.
The data-unloading function structure contains the following fields:
struct FlushProcRecord 
{
   FlushProcPtr flushProc;/* pointer to data-unloading function */
   long        flushRefCon;/* reference constant */
};
Field Description

flushProc
Contains a pointer to your data-unloading function.
flushRefCon
Contains a reference constant for use by your data-unloading function.

Subtopics

MyDataUnloadingProc