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 method. For more information on converting issues, see the section Loading and Saving.

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 ImageGear reads and writes the corresponding file format.

Format	1	4	8	9-16	24	32	36	48	64	Notes
BMP	RW	RW	RW	RW	RW	R
CLP	RW	RW	RW		RW
CUR	RW	RW	RW			RW				Also supports Extra ((1, 3, 4, 8)*2)-bit images.
DIB	RW	RW	RW	R	RW	R
DOCX										Read-only support. Specific bit-depths are not considered.
DOC										Read-only support. Specific bit-depths are not considered.
DNG				R				R
GIF	RW	RW	RW
JPEG			RW	RW	RW	RW	RW	RW		8-bit grayscale.
PDF	RW	RW	RW		RW	RW
PPTX										Read-only support. Specific bit-depths are not considered.
PPT										Read-only support. Specific bit-depths are not considered.
PNG	RW	RW	RW	RW	RW	RW		RW	RW	Supports 48(RGB)- and 64(RGB+alpha)-bit images.
PS	RW	RW	RW		RW	RW
RAW	R	R	R	R	R	R		R	R
SVG										Write-only support. Specific bit-depths are not considered.
TIFF	RW	RW	RW	RW	RW	RW	RW	RW	RW	Read only supports 3- and 6- bpp for RGB and LAB color spaces for Deflate Compression, LZW (Lempel-Ziv-Welch) Compression, Packbits Compression and uncompressed.
XLSX										Read-only support. Specific bit-depths are not considered.
XLS										Read-only support. Specific bit-depths are not considered.