LFile::SaveCMYKArray

#include "ltwrappr.h"

L_INT LFile::SaveCMYKArray(ppBitmapArray, uBitmapArrayCount, nFormat, nBitsPerPixel, nQFactor, uFlags, pSaveOptions)

pBITMAPHANDLE * ppBitmapArray;	/* array of pointers to BITMAPHANDLE handle */
L_UINT uBitmapArrayCount;	/* number of items in the bitmaps array */
L_INT nFormat;	/* output file format */
L_INT nBitsPerPixel;	/* desired bits per pixel for each bitmap */
L_INT nQFactor;	/* quality factor */
L_UINT uFlags;	/* flags that determine function behavior */
pSAVEFILEOPTION pSaveOptions;	/* pointer to optional extended save options */

This function saves an array of bitmaps as a CMYK TIFF file.

Parameter	Description
ppBitmapArray	Array of pointers to the bitmaps that contain each color plane. There should be 4 or 5 members in the array, depending on whether there is alpha channel information to save.
	All the bitmaps must have the same width, height, bits per pixel and palette. The uBitmapArrayCount parameter indicates how many pointers are stored in the array. The bitmaps are in this order: C, M, Y, K, Alpha (optional).
uBitmapArrayCount	Number of bitmaps present in ppBitmapArray.
nFormat	Output file format. Possible values are:
	Value	Meaning
	FILE_TIF_CMYK	[85] Tagged Image File, with no compression and with CMYK color space.
	FILE_TIF_PACKBITS_CMYK	[88] Tagged Image File with PackBits Compression and CMYK color space.
	FILE_TIFLZW_CMYK	[86] Tagged Image File with LZW Compression and CMYK color space.
	FILE_RAS_PDF_CMYK	[333] Raster PDF with uncompressed CMYK color space.
	FILE_RAS_PDF_LZW_CMYK	[334] Raster PDF with LZW Compression and CMYK color space.
nBitsPerPixel	Resulting bits per pixel for each plane. Possible values are:
	Value	Meaning
	0	Default bits per pixel. LEADTOOLS will pick the closest valid value.
	8	Save 8 bits per component. The generated file will contain 32 bits (no alpha) or 40 bits (with alpha). Note that LFile::GetInfo will report 8 bits less (24 or 32-bit).
	16	Save 16 bits per component. The generated file will contain 64 bits (no alpha) or 80 bits (with alpha). Note that LFile::GetInfo will report 16 bits less (48 or 64-bit). For TIF format only.
nQFactor	Reserved for future use. Pass 2.
uFlags	Binary flags that determine the behavior of LFile::SaveCMYKArray. You can specify one of the following values:
	Value	Meaning
	0	[0x0000] If the output file exists, it will be overwritten.
	SAVEFILE_MULTIPAGE	[0x0004] If the output file exists and is a valid TIFF file, the new image is appended to the end of the file. More advanced options can be passed using pSaveOptions.
pSaveOptions	Pointer to optional extended save options. Pass NULL to use the default save options.

Returns

SUCCESS	The function was successful.
ERROR_INV_COLORSPACE	Invalid color space
< 1	An error occurred. Refer to Return Codes.

Comments

This function will save a CMYK file without performing a color conversion. Each bitmap in the array will contain one of the C, M, Y, K, or Alpha planes. The Alpha plane is optional. The ppBitmapArray should contain:

4 elements if no Alpha information is included or
5 elements if the Alpha information is included

To load the array of bitmaps, use LFile::LoadCMYKArray.

To save the array of bitmaps as a file format not supported by this function, call LBitmap::ColorMerge to create a BGR bitmap and save the generated bitmap using LFile::SaveFile.

CMYK TIFF files can be saved as planar (each bitmap in its own plane) or chunky (the data from all the bitmaps is interleaved while saving). Planar images will be saved faster, while chunky images are more compatible (some TIFF readers will not read planar files) and require less memory during the load process. The default is to save chunky files.

To select the planar save mode, set SAVEFILEOPTION.Flags2 to ESO2_SAVEPLANAR [0x00000002]. Note that this option is set in the Flags2 member, not the Flags member (the SAVEFILEOPTION structure has two flag members: Flags and Flags2).

Required DLLs and Libraries

LTFIL

LFTIF

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

Functions:	LFile::LoadCMYKArray, LBitmap::ColorMerge, LBitmap::ColorSeparate, LFile::SaveFile, LBuffer::ConvertColorSpace
Topics:	Handling CMYK Files as Separate Bitmaps
	Loading and Saving Images
	Raster Image Functions: Saving Files