IG_fltr_load_file

This function loads an image from the specified file into memory and creates a HIGEAR handle for this image.

Declaration:

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AT_ERRCOUNT ACCUAPI IG_fltr_load_file_W( const LPAT_WCHAR lpwszFileName, UINT nPage, LPHIGEAR lphIGear );

Arguments:

Name	Type	Description
lpwszFileName	const LPAT_WCHAR	Path and name of the file to load, specified as a wide string (UTF-16). The path can be absolute or relative.
nPage	UINT	Page number to load if this is a multi-page file. Note that page numbers begin at 1, not 0. Set nPage to 1 if this is not a multi-page file.
lphIGear	LPHIGEAR	Pointer to the HIGEAR object in which to return the ImageGear handle of the image.

Return Value:

Returns 0 if successful. Otherwise, returns the number of ImageGear errors that occurred during this function call.

Supported Raster Image Formats:

All pixel formats supported by ImageGear for C and C++.

Sample:

GUI Windows

Example:

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HIGEAR hIGear; // Will hold handle returned by IG_fltr_load_file AT_ERRCOUNT nErrCount; // Count of errs on stack upon ret from func*/ // Load the selected image nErrCount = IG_fltr_load_file_W(L"picture.tif", 1, &hIGear); if(nErrCount == 0) { // ... // Delete the image IG_image_delete(hIGear); }

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HIGEAR    hIGear;        // Will hold handle returned by IG_fltr_load_file
AT_ERRCOUNT nErrCount;    // Count of errs on stack upon ret from func*/
// Load the selected image
nErrCount = IG_fltr_load_file_W(L"picture.tif", 1, &hIGear);
if(nErrCount == 0)
{
    // ...

    // Delete the image
    IG_image_delete(hIGear);
}

Remarks:

The handle that ImageGear assigns for this image is returned in the hIGear argument. The file named by wcFileName may be in any format recognized by ImageGear. The function will determine the format by inspecting the file's header section.

Some file formats, such as TXT (ASCII Text), JPEG, and others, may be loaded with additional control, using IG_fltr_ctrl_get and IG_fltr_ctrl_set. See the description of these functions also in "Using File Filter Control Parameters" in Loading and Saving.
Simply loading the file does not cause it to be displayed. Refer to IG_dspl_image_draw and related routines for how to display an image once it is in memory.

See also the section "Getting Information about a Format Filter" in Loading and Saving.

This function may work slower on PDF and PostScript images, compared to its ANSI analog IG_fltr_load_file.