mcGraphObjMaskBitmapOptions Enumeration |
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Legal values for the McGraphObjBitmap.MaskBitmap method'sMaskOptionFlags argument.
Namespace: MediaCy.IQL.Display.Overlays
Assembly: MediaCy.IQL.Display.Overlays (in MediaCy.IQL.Display.Overlays.dll) Version: 10.0.6912.0
SyntaxVB
Public Enumeration mcGraphObjMaskBitmapOptions
Members| Member name | Value | Description | |
|---|---|---|---|
| mcgmboNone | 0 | No options, this is the default state. | |
| mcgmboIgnoreZeroMaskValues | 1 | If set, areas of theMaskBitmapSource with zero value have no effect on the existing local opacity (alpha values) of the bitmap. If not set (the default case), then areas of the MaskBitmapSource with zero value set corresponding bitmap pixels to transparent (zero alpha). You might use this flag to create a circular "opacity brush" that could be used to set the opacity of pixels just in a circular region, leaving those outside of the circle unchanged. | |
| mcgmboIgnoreNonZeroMaskValues | 2 | If set, areas of theMaskBitmapSource with non-zero value have no effect on the existing local opacity (alpha values) of the bitmap. If not set (the default case), then areas of the MaskBitmapSource with non-zero value set corresponding bitmap pixels' alpha to the mask value (as scaled by the mcgmboMaskMultiplierByte and mcgmboMaskDivisorByte). You might use this flag to create an oval "picture frame" that could be used to make transparent only those pixels outside of an elliptical region, leaving the translucence of those inside of the ellipse unchanged. | |
| mcgmboMissingIsOpaque | 0 | For a call to the MaskBitmapmethod with an Empty or Missing MaskSourceBitmap argument, then the entire bitmap is set to fully opaque (alpha = 255). This is the default behavior, so the value of this flag is zero. | |
| mcgmboMissingIsMultiplierByte | 16 | If this flag is set for acall to the MaskBitmap method with an Empty or Missing MaskSourceBitmap argument, then the then the entire bitmap is set to the value of the mcgmboMaskMultiplierByte (which if zero is fully transparent, alpha = 0). You might wish to do this to prepare the bitmap for subsequent masking of a sub-rectangle. This MaskOptionFlags bit is illegal for a MaskBitmap method where the MaskBitmapSource is not missing or Empty. | |
| mcgmboMaskMultiplierByte | 65280 | If non-zero, this byte value isused as a multiplier for values in the MaskBitmapSource before being divided by the mcgmboMaskDivisorByte and then used to set bitmap pixel alpha values. Note that masks set from McBitMask sources will have values of only either zero or 255, so scaling the value is essential to having any intermediate effect on bitmap Alpha values. If the mcgmboMissingIsMultiplierByte flag is set, and the MaskSourceBitmap argument is missing or Empty, then this byte value is used to set the alpha value of the entire bitmap. | |
| mcgmboMaskMultiplierByteShift | 256 | Amount to dividemcgmboMaskMultiplierByte by to get the byte's correct value. | |
| mcgmboMaskDivisorByte | 16711680 | If non-zero, this byte value isused as a divisor for values in the MaskBitmapSource after being multiplied by the mcgmboMaskMultiplierByte and then used to set bitmap pixel alpha values. Note that masks set from McBitMask sources will have values of only either zero or 255, so scaling the value is essential to having any intermediate effect on bitmap Alpha values. | |
| mcgmboMaskDivisorByteShift | 65536 | Amount to dividemcgmboMaskDivisorByte to get the byte's correct value. |
See Also