OVERLAYATTRIBUTES

The OVERLAYATTRIBUTES structure contains the overlay attributes. The attributes are stored as member variables or as flags inside the uFlags member.

Member Data Type Description
uStructSize L_UINT The size of the structure (use sizeof (OVERLAYATTRIBUTES))
ptOrigin POINT Origin (top left point), in pixels, of the overlay bitmap, relative to the top left point of the displayed main bitmap. This is independent of the main bitmap's view perspective.
crColor COLORREF The color used to display those pixels in the overlay bitmap with a value of 1.
uFlags L_UINT One or more of the following flags:
    Value Meaning
    OVERLAY_AUTOPAINT [0x00000001] Paint the overlay automatically when the bitmap is painted using the L_PaintDC functions.
    OVERLAY_AUTOPROCESS [0x00000002] Automatically adjust the overlay bitmap and position when the main bitmap is resized (zoomed in), scrolled, rotated, flipped, reversed, sheared, trimmed.
    OVERLAY_USEBITPLANE [0x00000004] The overlay has a corresponding bitplane in the main bitmap. uBitPosition is the index bitplane.
uBitPosition L_UINT16 Corresponding bit plane associated with an overlay. Valid only if OVERLAY_USEBITPLANE is set in uFlags. For more information about the bit position, refer to "Overlay Plane Module Attributes" in the DICOM standard.
uRows L_UINT16 Number of rows in the overlay. For more information, refer to "Overlay Plane Module Attributes" in the DICOM standard.
uColumns L_UINT16 Number of columns in the overlay. For more information, refer to "Overlay Plane Module Attributes" in the DICOM standard.
szType L_CHAR A null-terminated string that indicates whether this overlay represents a region of interest or other graphics. For more information, refer to "Overlay Plane Module Attributes" in the DICOM standard.
uBitsAllocated L_UINT16 Number of bits allocated in the overlay. For more information, refer to "Overlay Plane Module Attributes" in the DICOM standard.
szDescription L_CHAR NULL terminated string that contains user-defined comments about the overlay. For more information, refer to "Overlay Plane Module Attributes" in the DICOM standard.
szSubtype L_CHAR NULL terminated string that contains a defined term that identifies the intended purpose of the overlay type. For more information on possible values, refer to "Overlay Plane Module Attributes" in the DICOM standard.
szLabel L_CHAR NULL terminated string that contains user defined text, which may be used to label or name this overlay. For more information, refer to "Overlay Plane Module Attributes" in the DICOM standard.
nROIArea L_INT32 Number of pixels in the Region Of Interest area. For more information, refer to "Overlay Plane Module Attributes" in the DICOM standard.
fROIMean L_DOUBLE Average value of the pixels in the Region Of Interest. For more information, refer to "Overlay Plane Module Attributes" in the DICOM standard.
fROIStandardDeviation L_DOUBLE The standard deviation of the pixel values in the Region Of Interest. For more information, refer to "Overlay Plane Module Attributes" in the DICOM standard.
nNumFramesInOverlay L_INT32 Number of Frames in the overlay. For more information, refer to "Multi-frame Overlay Module Attributes" in the DICOM standard.
uImageFrameOrigin L_UINT16 The number of the frame of a multi-frame image to which this overlay applies. For more information, refer to "Multi-frame Overlay Module Attributes" in the DICOM standard.
szActivationLayer L_CHAR NULL terminated string that identifies the layer in which the overlay shall be displayed. For more information, refer to "Overlay/Curve Activation Module Attributes" in the DICOM standard.
Help Version 19.0.2017.10.18
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