Inside Macintosh: 3D Graphics Programming With QuickDraw 3D /

Chapter 16 - Storage Objects / Storage Objects Reference

Storage Objects Routines / Creating and Accessing Memory Storage Objects

Q3MemoryStorage_New

You can use the Q3MemoryStorage_New function to create a new memory storage object.

TQ3StorageObject Q3MemoryStorage_New (
const unsigned char *buffer, 
unsigned long validSize);

buffer

A pointer to a buffer in memory, or NULL.

validSize

The size, in bytes, of the valid metafile data contained in the specified buffer. If buffer is set to NULL, this parameter specifies the initial size and also the grow size of the buffer that QuickDraw 3D allocates internally.

DESCRIPTION

The Q3MemoryStorage_New function returns, as its function result, a new memory storage object associated with the data in the buffer specified by the buffer and validSize parameters. The data in the specified buffer is copied into internal QuickDraw 3D memory, so you can dispose of the buffer if Q3MemoryStorage_New returns successfully.

If you pass the value NULL in the buffer parameter, QuickDraw 3D allocates a buffer of validSize bytes, increases the buffer by that size whenever necessary, and later disposes of the buffer when the associated storage object is closed or disposed of. If buffer is set to NULL and validSize is set to 0, QuickDraw 3D uses a default initial buffer and grow size.

If Q3MemoryStorage_New cannot create a new storage object, it returns the value NULL.

ERRORS

kQ3ErrorOutOfMemory