IG_image_DIB_export_size

This function calculates the size of the exported DIB for an image.

Declaration:

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AT_ERRCOUNT ACCUAPI IG_image_DIB_export_size_calc( const HIGEAR hIGear, AT_INT* lpDIBSize, const AT_DIB_EXPORT_OPTIONS* lpOptions );

Arguments:

Name	Type	Description
hIGear	const HIGEAR	HIGEAR handle of image for which to calculate exported DIB size.
lpDIBSize	AT_INT*	Pointer to where exported DIB size will be stored.
lpOptions	const AT_DIB_EXPORT_OPTIONS*	Export options. See IG_image_DIB_export for details.

Return Value:

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

Supported Raster Image Formats:

If lpOptions->Format is IG_DIB_EXPORT_FORMAT_WINDOWS:

Indexed RGB - 1, 4, 8 bpp
Grayscale - 8 bpp
RGB - 24 bpp

If lpOptions->Format is IG_DIB_EXPORT_FORMAT_IG_LEGACY:

Indexed RGB - 1, 4, 8 bpp
Grayscale - 8...16 bpp
RGB - 24 bpp
CMYK - 32 bpp

Example:

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AT_ERRCOUNT nErrcount; // Number of errors on stack HIGEAR hIGear; // Handle of image AT_INT nDibSize; // Exported DIB size AT_DIB_EXPORT_OPTIONS Options; // Options for DIB export // Load image file "picture.bmp" from working directory nErrcount = IG_load_file("picture.bmp", &hIGear); if(nErrcount == 0) { // Get exported DIB size, allocate memory buffer and export DIB memset(&Options, 0, sizeof(AT_DIB_EXPORT_OPTIONS)); Options.Format = IG_DIB_EXPORT_FORMAT_IG_LEGACY; Options.UseAlpha = FALSE; IG_image_DIB_export_size_calc(hIGear, &nDibSize, &Options); // ... } // Destroy the image IG_image_delete(hIGear);

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AT_ERRCOUNT nErrcount;  // Number of errors on stack
HIGEAR hIGear;          // Handle of image
AT_INT nDibSize;        // Exported DIB size
AT_DIB_EXPORT_OPTIONS Options; // Options for DIB export

// Load image file "picture.bmp" from working directory
nErrcount = IG_load_file("picture.bmp", &hIGear);
if(nErrcount == 0)
{
    // Get exported DIB size, allocate memory buffer and export DIB
    memset(&Options, 0, sizeof(AT_DIB_EXPORT_OPTIONS));
    Options.Format = IG_DIB_EXPORT_FORMAT_IG_LEGACY;
    Options.UseAlpha = FALSE;
    IG_image_DIB_export_size_calc(hIGear, &nDibSize, &Options);
    // ...
}
// Destroy the image
IG_image_delete(hIGear);

Remarks:

Use this function to calculate the minimal buffer size required to export a DIB with IG_image_DIB_export.