This function allows you to set the non-rectangular ROI attributes associated with any HIGEAR that has an associated non-rectangular ROI mask.

Declaration:

AT_ERRCOUNT ACCUAPI IG_IP_NR_ROI_control_set( 
        HIGEAR hIGear, 
        AT_MODE nAttributeID, 
        const LPVOID lpData
);

Arguments:

Return Value:

Returns the number of ImageGear errors that occurred during this function call. If there are no errors, the return value is IGE_SUCCESS.

Supported Raster Image Formats:

This function does not process image pixels.

Example:

AT_ERRCOUNT      nErrcount;
HIGEAR  hIGear;
BOOL    bCondition;
HIGEAR  hIGearMask;]
/* Find out whether the image rectangle for hIGear is set to be overridden by a non-
rectangular ROI   */
nErrcount = IG_IP_NR_ROI_control_set (hIGear, IG_CONTROL_NR_ROI_DIB, (LPVOID) hIGearMask);
/* Find out what the reference point for a mask HIGEAR is in the hIGear */
nErrcount = IG_IP_NR_ROI_control_set (hIGear, IG_CONTROL_NR_ROI_CONDITION, (LPVOID)
bCondition);

Remarks:

These attributes are only applicable for non-rectangular ROIs. Use IG_IP_NR_ROI_to_HIGEAR_mask() to create the mask image.

All ROI control settings have defined constants in accucnst.h which have a prefix of IG_CONTROL_NR_ROI_. The following is a list of each setting available at the time of this writing, and a description of what each does.

• IG_CONTROL_NR_ROI_DIB: Sets the DIB to be used as the mask HIGEAR for the currently loaded HIGEAR image.
• IG_CONTROL_NR_ROI_REFERENCE_POINT: Sets the position within the HIGEAR image at which the upper-left corner of the masking HIGEAR should be placed.
• IG_CONTROL_NR_ROI_REFERENCE_POINT_LEFT: Sets the left point of the mask.
• IG_CONTROL_NR_ROI_REFERENCE_POINT_TOP: Sets the top point of the mask.
• IG_CONTROL_NR_ROI_CONDITION: Sets whether or not ImageGear should override the AT_RECT argument passed to its API. Set to TRUE if you would like ImageGear to use the non-rectangular ROI defined by the mask HIGEAR. Set to FALSE for ImageGear to use the rectangular ROI defined by the current image rectangle.