Format Bit Depths

You may want to convert a file from one format to another. You can do this by saving the original file to its desired format by setting the nFormatType parameter to the appropriate value in the saving function. For more information on converting issues, see the sections Loading Images and Saving Images.

When saving a file to another format, remember to ensure that the desired file format is supported for that image. For example, you cannot convert an 8-bit DCX file to an 8-bit CAL file, because the CAL format does not support 8-bit files.

In the following table, the columns underneath the numbers indicated size in bits that can actually be saved (written). In each cell, a value of "R" indicates read-only support, and a value of "RW" indicates that the ImageGear reads and writes the corresponding file format.

Format	1	4	8	9-16	24	32	36	48	64	Notes
Adobe DNG				R				R
Adobe PDF	RW	RW	RW		RW	RW
Adobe PS	RW	RW	RW		RW	RW
Adobe PSB	RW		RW	RW	RW	RW		R	R
Adobe PSD	RW		RW	RW	RW	RW		R	R
AFX					R
AVI	R	R	R		R
BMP	RW	RW	RW	RW	RW	R
BTR	RW
CAL	RW
CGM										Read-write support. Specific bit-depths are not considered.
CLP	RW	RW	RW		RW
CUR	RW	RW	RW			RW				Supports Extra ((1, 3, 4, 8)*2)-bit images also.
CUT			RW
DCRAW				R				R
DCX	RW	RW	RW		RW
DGN										Read-only support. Specific bit-depths are not considered.
DIB	RW	RW	RW	R	RW	R
DICOM	RW		RW	RW	RW	RW		RW
DWF										Read-write support. Specific bit-depths are not considered.
DWG										Read-write support. Specific bit-depths are not considered.
DXF										Read-write support. Specific bit-depths are not considered.
EPS	RW	RW	RW		RW					Screen Preview image only when reading.
EXIF-JPEG			RW	RW	RW	RW	RW
EXIF-TIFF	RW	RW	RW	RW	RW	RW	RW	RW	RW
FlashPix			RW	RW	RW
GEM	R	R	R
GIF	RW	RW	RW
Group 3	RW
Group 3 2D	RW
Group 4	RW
HD Photo	RW		RW	RW	RW	RW		RW	RW
Headerless Digital Camera RAW				R				R
HPGL										Read-only support. Specific bit-depths are not considered.
IBM AFP	R	R	R		RW
IBM IOCA	RW	R	R		R
IBM MO:DCA	RW	R	R		R
ICO	RW	RW	RW			RW
IFF	RW	RW	RW		RW
IMG	R		R
IMR	R
IMT	RW
JPEG			RW	RW	RW	RW	RW	RW		8-bit grayscale.
JPEG 2000	RW	RW	RW	RW	RW	RW	RW	RW	RW
JPX	RW	RW	RW	RW	RW	RW	RW	RW	RW
KFX	R
LV	R
MAC	R
MAC PICT	RW	RW	RW		RW	RW
MSP	R
MULTIMEDIA					R
NCR	RW	R
PBM	RW		RW	RW	RW			RW
PCD					R
PCX	RW	RW	RW		RW
PGM			RW	RW						Supports 16-bit grayscale images also.
PNG	RW	RW	RW	RW	RW	RW		RW	RW	Supports 48(RGB) and 64(RGB+alpha) bit images.
PNM	RW		RW	RW	RW			RW		Supports 16-bit grayscale and 48-bit color images also.
PPM					RW			RW
PTOCA			R
QuickTime					R
RAS	RW	R	RW		RW
RAW	R	R	R	R	R	R
Scitex CT						RW				The native format is CMYK. With full CMYK support enabled, you can use 32-bit images.
SGI			RW	RW	RW	RW
SVG										Read-write support. Specific bit-depths are not considered.
TGA	RW		RW	RW	RW	RW
TIFF	RW	RW	RW	RW	RW	RW	RW	RW	RW	Read only supports also 3 and 6 bpp for RGB and LAB color spaces for Deflate, LZW (Lempel-Ziv-Welch), Packbits compressions and uncompressed.
TXT (ASCII Text)										Read-only support. Converts to raster image when loaded.
U3D										Read-write support. Specific bit-depths are not considered.
WBMP	RW
WMF	RW	RW	RW		RW
WPG	R	R	R
XBM	RW
XPM	RW	RW	RW		R
XPS	RW		RW	RW	RW	RW		RW	RW
XWD	RW	RW	RW		RW