L_UCHAR * pBuffer;

/* pointer to the file in memory to be loaded */

pBITMAPHANDLE pBitmap;

/* pointer to the target bitmap handle */

L_UINT uStructSize;

/* size in bytes, of the structure pointed to by pBitmap */

L_INT nBitsPerPixel;

/* resulting bitmap pixel depth */

L_INT nOrder;

/* color order for 16-, 24-, 32-, 48- and 64-bit bitmaps */

L_SSIZE_T nBufferSize;

/* size of the file in memory (in bytes) */

pLOADFILEOPTION pLoadOptions;

/* pointer to optional extended load options */

pFILEINFO pFileInfo;

/* pointer to a structure */

Parameter

Description

pBuffer

Pointer to the file in memory to be loaded.

pBitmap

Pointer to the bitmap handle referencing the target bitmap.

uStructSize

Size in bytes, of the structure pointed to by pBitmap, for versioning. Use sizeof(BITMAPHANDLE).

nBitsPerPixel

Resulting bitmap pixel depth. The following are valid values:

Value

Meaning

0

Keep the original file's pixel depth (Do not convert). A special note about loading 12 and 16-bit grayscale images.

1 to 8

The specified bits per pixel in the resultant bitmap

12

12 bits per pixel in the resultant bitmap.

16

16 bits per pixel in the resultant bitmap

24

24 bits per pixel in the resultant bitmap

32

32 bits per pixel in the resultant bitmap

48

48 bits per pixel in the resultant bitmap

64

64 bits per pixel in the resultant bitmap

nOrder

Color order for 16-, 24-, 32-, 48-, 64-bit bitmaps. If the resultant bitmap is less than 16 bits per pixel, this will have no effect since palletized images have no order. The following are valid values:

Value

Meaning

ORDER_RGB

[0] Red, green, and blue color order in memory

ORDER_BGR

[1] Blue, green, and red color order in memory

ORDER_GRAY

[2] 12 or 16-bit grayscale image. 12 and 16-bit grayscale images are only supported in the Document/Medical Imaging editions .

ORDER_RGBORGRAY

[3] Load the image as red, green, blue OR as a 12 or 16-bit grayscale image. 12 and 16-bit grayscale images are supported in the Document/Medical Imaging editions only.

ORDER_BGRORGRAY

[4] Load the image as blue, green, red OR as a 12 or 16-bit grayscale image. 12 and 16-bit grayscale images are supported in the Document/Medical Imaging editions only.

ORDER_ROMM

[5] ROMM order. ROMM only supports 24 and 48-bit images.

ORDER_BGRORGRAYORROMM

[6] Load the image as red, green, blue OR as a 12 or 16-bit grayscale image OR as ROMM. 12 and 16-bit grayscale images are supported in the Document/Medical Imaging editions only. ROMM only supports 24 and 48-bit color images.

nBufferSize

Size of the file in memory (in bytes).

pLoadOptions

Pointer to optional extended load options. Pass NULL to use the default load options.

pFileInfo

Pointer to a FILEINFO structure. This structure may contain file information used in loading an image, or it may be updated with information about the file being loaded.

If nothing is known about the file, pass NULL for this parameter, or declare a variable of type FILEINFO and set the FILEINFO.Flags to 0, then pass the address of the FILEINFO structure in this parameter. In this case, if the address of a FILEINFO structure is passed, the FILEINFO structure will be updated with the results of L_FileInfo.

If only the file type is known, set pFileInfo.Format to the file type and set pFileInfo.Flags to FILEINFO_FORMATVALID. This can also be done if L_FileInfo has been called previously, but values that affect the size of the image loaded have been changed (for example, by calling L_SetPCDResolution or L_SetWMFResolution). In this case the FILEINFO structure pointed to by pFileInfo will be updated with the results of L_FileInfo.

If L_FileInfo has been called prior to calling this function, and no changes have been made to the contents of the structure filled by L_FileInfo, then the address of the filled FILEINFO structure can be passed for this parameter. In this case, the FILEINFO.Flags member should be set to FILEINFO_INFOVALID. The L_FileInfo function will set the FILEINFO.Flags to FILEINFO_INFOVALID. In this case the load will be faster since this function does not have to query the file filters for the file type.

Note: Local variables are not initialized (since they are placed on the stack). So if you have a FILEINFO structure as a local variable, the value of its Flags parameter is undefined, possibly having FILEINFO_INFOVALID or FILEINFO_FORMATVALID set. That is why it is important to initialize FILEINFO.Flags before passing the address of the FILEINFO structure to the function.

SUCCESS

The function was successful.

< 1

An error occurred. Refer to Return Codes.

Note:

More options are available in the LOADFILEOPTION structure.

Note:

Redirected IO is not supported for some file formats.  For more information, refer to File Formats for Which Redirected IO is Not Supported.

LTFIL
File format DLLs

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:

L_LoadMemory, L_LoadBitmapMemory, L_LoadMemory, L_SetWMFResolution, L_SetLoadInfoCallback L_SetLoadResolution, L_SetPCDResolution,
For Vector files: L_2DGetViewMode, L_2DGetViewPort, L_2DSetViewMode, L_2DSetViewPort, L_GetLoadStatus

Topics:

Raster Image Functions: Loading Files

Raster Image Functions: Redirecting Input and Output

Raster Image Functions: Input and Output

Loading and Saving Images

Using a PanWindow