OVERLAYATTRIBUTES (original) (raw)
The OVERLAYATTRIBUTES structure contains the overlay attributes. The attributes are stored as member variables or as flags inside the uFlags member.
Members
L_UINT uStructSize
The size of the structure (use sizeof (OVERLAYATTRIBUTES))
L_POINT ptOrigin
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.
L_COLORREF crColor
The color used to display those pixels in the overlay bitmap with a value of 1.
L_UINT uFlags
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. |
L_UINT16 uBitPosition
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.
L_UINT16 uRows
Number of rows in the overlay. For more information, refer to "Overlay Plane Module Attributes" in the DICOM standard.
L_UINT16 uColumns
Number of columns in the overlay. For more information, refer to "Overlay Plane Module Attributes" in the DICOM standard.
L_TCHAR szType
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.
L_UINT16 uBitsAllocated
Number of bits allocated in the overlay. For more information, refer to "Overlay Plane Module Attributes" in the DICOM standard.
L_TCHAR szDescription
NULL terminated string that contains user-defined comments about the overlay. For more information, refer to "Overlay Plane Module Attributes" in the DICOM standard.
L_TCHAR szSubtype
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.
L_TCHAR szLabel
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.
L_INT32 nROIArea
Number of pixels in the Region Of Interest area. For more information, refer to "Overlay Plane Module Attributes" in the DICOM standard.
L_DOUBLE fROIMean
Average value of the pixels in the Region Of Interest. For more information, refer to "Overlay Plane Module Attributes" in the DICOM standard.
L_DOUBLE fROIStandardDeviation
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.
L_INT32 nNumFramesInOverlay
Number of Frames in the overlay. For more information, refer to "Multi-frame Overlay Module Attributes" in the DICOM standard.
L_UINT16 uImageFrameOrigin
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.
L_TCHAR szActivationLayer
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.