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RasterMemoryFlags Enumeration


Indicates the type of memory to allocate.

public enum RasterMemoryFlags 
Public Enum RasterMemoryFlags  
typedef NS_OPTIONS(NSUInteger, LTRasterMemoryFlags) 
public enum RasterMemoryFlags 
public enum class RasterMemoryFlags   

0x00000000None No flags.
0x00000001Conventional Use conventional memory.
0x00000002User Creates an image where the user maintains the data pointer. Some image processing commands, such as RotateCommand and ColorResolutionCommand, need to re-allocate the image data. If you create a bitmap with RasterMemoryFlags.User, and pass it to these command, they will change the bitmap to RasterMemoryFlags.Conventional and re-allocate memory. Your original memory will no longer be used.
0x00000004Tiled Creates an image where the data pointers are maintained in tiles, useful for very large images.
0x00000008NoTiled Do not allow tiled images.
0x00000080Disk Do not use managed memory. Swap to disk only. If the image is allocated as Disk, then the image cannot be accessed by multiple threads at the same time.
0x00000100NoDisk Do not swap to disk using LEAD virtual memory. Windows virtual memory is not affected.
0x00000200Compressed (Document/Medical only) Allocate an RLE-compressed image. You can use this flag with None or NoDisk. For more information, refer to Speeding Up 1-Bit Documents.
0x00000400SuperCompressed (Document/Medical only) Allocate a CMP-compressed image. You can use this flag with None or NoDisk. The compression used for 24-bit and 8-bit images is lossy, which means multiple changes to the image can produce some visual loss.
0x00000800WriteableBitmap No longer supported.


For more information, refer to Memory Storage Types for Images. Use only RasterMemoryFlags.Conventional or RasterMemoryFlags.Disk when setting defaults.


Target Platforms

See Also


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