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Example. The ImageAttributes class has many properties that you can use to modify images during rendering
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The ImageAttributes class has many properties that you can use to modify images during rendering. In the following example, an ImageAttributes object is used to set all the alpha values to 80 percent of what they were. This is done by initializing a color matrix and setting the alpha scaling value in the matrix to 0.8. The address of the color matrix is passed to the SetColorMatrix method of the ImageAttributes object, and the ImageAttributes object is passed to the DrawString method of the Graphics object.
During rendering, the alpha values in the bitmap are converted to 80 percent of what they were. This results in an image that is blended with the background. As the following illustration shows, the bitmap image looks transparent; you can see the solid black line through it.
Where the image is over the white portion of the background, the image has been blended with the color white. Where the image crosses the black line, the image is blended with the color black.
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