Sets the alpha values starting at offset <code>x</code> in
scanline <code>y</code> in the receiver's alpha data to the
values from the array <code>alphas</code> starting at
<code>startIndex</code>. The alpha values must be between
<code>(byte)0</code> (transparent) and <code>(byte)255</code> (opaque)
@param x the x coordinate of the pixel to being setting the alpha values
@param y the y coordinate of the pixel to being setting the alpha values
@param putWidth the width of the alpha values to set
@param alphas the alpha values to set
@param startIndex the index at which to begin setting
@exception IndexOutOfBoundsException if putWidth is too large
@exception IllegalArgumentException <ul>
<li>ERROR_NULL_ARGUMENT - if pixels is null</li>
<li>ERROR_INVALID_ARGUMENT - if x or y is out of bounds</li>
<li>ERROR_INVALID_ARGUMENT - if putWidth is negative</li>
</ul>
Sets the alpha values starting at offset <code>x</code> in scanline <code>y</code> in the receiver's alpha data to the values from the array <code>alphas</code> starting at <code>startIndex</code>. The alpha values must be between <code>(byte)0</code> (transparent) and <code>(byte)255</code> (opaque)
@param x the x coordinate of the pixel to being setting the alpha values @param y the y coordinate of the pixel to being setting the alpha values @param putWidth the width of the alpha values to set @param alphas the alpha values to set @param startIndex the index at which to begin setting
@exception IndexOutOfBoundsException if putWidth is too large @exception IllegalArgumentException <ul> <li>ERROR_NULL_ARGUMENT - if pixels is null</li> <li>ERROR_INVALID_ARGUMENT - if x or y is out of bounds</li> <li>ERROR_INVALID_ARGUMENT - if putWidth is negative</li> </ul>