IG_dspl_transparency

This function sets the transparency options.

Declaration:

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AT_ERRCOUNT ACCUAPI IG_dspl_transparency_set( [IN] HIGEAR hIGear, [IN] DWORD dwGrpID, [IN] AT_MODE nTranspMode, [IN] const LPAT_RGB lpTranspColor, [IN] HIGEAR hIMask, [IN] const LPAT_RECTANGLE lpMaskRect, [IN] const LPAT_POINT lpMaskLocation );

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AT_ERRCOUNT  ACCUAPI  IG_dspl_transparency_set(
        [IN] HIGEAR hIGear,
        [IN] DWORD dwGrpID,
        [IN] AT_MODE nTranspMode,
        [IN] const LPAT_RGB lpTranspColor,
        [IN] HIGEAR hIMask,
        [IN] const LPAT_RECTANGLE lpMaskRect,
        [IN] const LPAT_POINT lpMaskLocation
);

Arguments:

Name	Type	Description
hIGear	HIGEAR	ImageGear handle of image.
dwGrpID	DWORD	Identifier of the group in which to set transparency options.
nTranspMode	AT_MODE	New value of TranspMode to set. Possible value may be: IG_DSPL_TRANSPARENCY_NONE, or a combination of one of the following flags: IG_DSPL_TRANSPARENCY_COLOR IG_DSPL_TRANSPARENCY_MASK IG_DSPL_TRANSPMASK_STRETCH_TO_IMAGE and one of these flags: IG_DSPL_TRANSPMASK_LOCATE_TO_IMAGE IG_DSPL_TRANSPMASK_LOCATE_TO_CLIPRECT IG_DSPL_TRANSPMASK_LOCATE_ABSOLUTE
lpTranspColor	const LPAT_RGB	New value of TranspColor to set. If NULL, then this parameter is ignored.
hIMask	HIGEAR	New value of TranspMask option to set. Please note that the image is not deleted and the application code is responsible for removing the old value of this option.
lpMaskRect	const LPAT_RECTANGLE	New value of MaskRect option to set. If NULL, then this parameter is ignored. An empty rectangle is possible.
lpMaskLocation	const LPAT_POINT	New value of MaskLocation option to set. If NULL, then this parameter is ignored.

Return Value:

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++.

Example:

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HIGEAR hIGear; /* HIGEAR handle of image / DWORD nGrpID; / display group identifier / AT_MODE nTranspMode; / transparency mode / AT_RGB TranspColor; / transparency color / HIGEAR hIMask; / transparent mask / ... / enable transparent color and mask with default mask rectangle and location oriented and scaled with main image / nTranspMode = IG_DSPL_TRANSPARENCY_COLOR\|IG_DSPL_TRANSPARENCY_MASK\|IG_DSPL_TRANSPMASK_STRETCH_TO_IMAGE\| IG_DSPL_TRANSPMASK_LOCATE_TO_IMAGE; / set transparent color to white */ TranspColor.r = TranspColor.g = TranspColor.b = 255; IG_dspl_transparency_set( hIGear, nGrpID, nTranspMode, &TranspColor, hIMask, NULL, NULL ); ...

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HIGEAR           hIGear;        /* HIGEAR handle of image  */
DWORD           nGrpID;        /* display group identifier  */
AT_MODE          nTranspMode;    /* transparency mode  */
AT_RGB          TranspColor;    /* transparency color */
HIGEAR          hIMask;         /* transparent mask   */
 ...
/* enable transparent color and mask with default mask rectangle and location oriented and
scaled with main image */ 
nTranspMode =
IG_DSPL_TRANSPARENCY_COLOR|IG_DSPL_TRANSPARENCY_MASK|IG_DSPL_TRANSPMASK_STRETCH_TO_IMAGE|
IG_DSPL_TRANSPMASK_LOCATE_TO_IMAGE;
/* set transparent color to white */
TranspColor.r = TranspColor.g = TranspColor.b = 255;
IG_dspl_transparency_set( hIGear, nGrpID, nTranspMode, &TranspColor, hIMask, NULL, NULL );
 ...

Remarks:

This function sets the transparency only for image displaying. For saving image with transparency mask use function IG_display_transparent_set().