FILEINFO

The FILEINFO structure, which is loaded by the L_FileInfo function, provides information about the specified file.

Note: The LTFIL.H header file describes the entire FILEINFO structure.

Member

Data Type

Description

uStructSize

L_UINT

Size of this structure in bytes, for versioning. Use the sizeof() macro to calculate this value.

Format

L_INT

File format. For possible values, refer to Formats of Input Files.

Name[16]

L_TCHAR

A 16-character array containing the null-terminated string that is the DOS file name. In WIN32, the name is truncated if it exceeds 15 characters.

Width

L_INT

Image width, in pixels.

Height

L_INT

Image height, in pixels.

BitsPerPixel

L_INT

Bits per pixel.

SizeDisk

L_INT32

Size of the file on disk (in bytes).

SizeMem

L_INT32

Amount of memory (in bytes) required to load the file.

Compression[20]

L_TCHAR

A 20-character array containing the null-terminated string that describes the compression method.

ViewPerspective

L_INT

Where the beginning of the image is stored. Valid values are TOP_LEFT, BOTTOM_LEFT, TOP_RIGHT, BOTTOM_RIGHT, TOP_LEFT90, and TOP_LEFT270. For descriptions, refer to Accounting for View Perspective.

Order

L_INT

Color order of the bitmap. This field is meaningful if the image does not have a palette. It indicates whether the color values are in red-green-blue or blue-green-red order. Possible values are ORDER_RGB, ORDER_BGR and ORDER_GRAY.

PageNumber

L_INT

The page number in a multi-page file. To determine the total number of pages in a file, call L_FileInfo with uFlags set to FILEINFO_TOTALPAGES.

TotalPages

L_INT

The total number of pages present in a file. To update this field, call L_FileInfo with uFlags set to FILEINFO_TOTALPAGES. If you do not want this field updated, call L_FileInfo with uFlags set to 0.

XResolution

L_INT

Horizontal resolution, in dots per inch. Some file formats save this value in the file header.

YResolution

L_INT

Vertical resolution, in dots per inch. Some file formats save this value in the file header.

Flags

L_INT32

For possible values, refer to FILEINFO Flags.

GlobalLoop

L_UINT

Global animation loop count. 0 = infinity. This field is valid only if the FILEINFO_HAS_GLOBALLOOP flag is set.

GlobalWidth

L_INT

Global width for animation playback

GlobalHeight

L_INT

Global height for animation playback

GlobalBackground

COLORREF

Global background color for animation playback (FILEINFO Flags)

GlobalPalette[256]

RGBQUAD

Global palette for animation playback (FILEINFO Flags).

IFD

L_UINT32

Offset within a TIFF file where a page starts. This member is updated when L_FileInfo is called.

Layers

L_INT

Number of layers in the file. If this value is 0, then the file does not contain any layers. Only PSD files can have layers.

ColorSpace

L_INT

Color space of the file. The possible values are:

 

 

Value

Meaning

 

 

COLORSPACE_BGR

[0] Color space is RGB or BGR

 

 

COLORSPACE_YUV

[1] Color space is YUV or YCbCr

 

 

COLORSPACE_CMYK

[2] Color space is CMYK

 

 

COLORSPACE_CIELAB

[3] Color space is CIELab

Comments

pFILEINFO is a pointer to a FILEINFO structure. Where the function parameter type is pFILEINFO, you can declare a FILEINFO variable, update the structure's fields, and pass the variable's address in the parameter. Declaring a pFILEINFO variable is necessary only if your program requires a pointer.

Some functions which take this structure as a parameter require that the structure must be initialized prior to the function call. You must set the uStructSize member to the total size, in bytes, of the structure. Use the sizeof() macro to calculate this value. Functions that do not require the structure be initialized will take the total size of the structure, in bytes, as an additional function parameter.

Note:

For more information about loading and saving large TIFF files faster, refer to Loading and Saving Large TIFF Files.

Please note that if FILEINFO.Format is FILE_JPEG or FILE_TIF_JPEG and FILEINFO.BitsPerPixel is 8, then the image is 4:0:0 color space, not 4:4:4 color space.

Currently only PSD files support layers.