This method creates a lens like effect on a raster image.
Public Function Lens(refract As Double, backColor As Boolean, red As Byte, green As Byte, blue As Byte) As Boolean
public bool Lens(double refract, bool backColor, byte red, byte green, byte blue);
Parameters
refract
Sets the lens magnification (Greater
than 1)
backColor
Sets whether or not the area outside
of the lens effect is painted a particular color [True: the area is
painted, False: the area is not painted]
red
Sets the red component of the color
painted in the area outside the lens (from 0 to 255)
green
Sets the green component of the color
painted in the area outside the lens (from 0 to 255)
blue
Sets the Blue component of the color
painted in the area outside the lens (from 0 to 255)
Return Value
Returns True if successful. Returns False if unsuccessful.
Explanation
The Lens method produces a lens like effect on a raster image. To execute the Lens method, set the image handle of the image in the SourceImage property. The Lens method supports 8-bit grayscale, 16, 24, and 32 bit images.
Before executing the Lens method, you must set the area on the image that will be affected. There are 4 ways to do this.
- To use a mask image, set the SelectMode property to EffectMask. Set the mask image handle in the SourceMask property
- To process the total image, set the SelectMode property to EffectAll
- To process the polygonal area on the image, set the SelectMode property to EffectPolygon. Select the polygon by setting the appropriate coordinate values for the points of the polygon in the Point property
- To process an elliptical area on the image, set the SelectMode property to EffectEllipse. Select the ellipse by setting the appropriate values for the bounding rectangle in the Rect property
When the SelectMode property is set to EffectPolygon or EffectEllipse, the appropriate values must be set in the Inside property.
If successful the resulting raster image data is set in the DestinationImage property.