Returns the pixel value at offset <code>x</code> in
scanline <code>y</code> in the receiver's data.
@param x the x position of the pixel to get
@param y the y position of the pixel to get
@return the pixel at the given coordinates
@exception IllegalArgumentException <ul>
<li>ERROR_INVALID_ARGUMENT - if either argument is out of bounds</li>
</ul>
@exception SWTException <ul>
<li>ERROR_UNSUPPORTED_DEPTH if the depth is not one of 1, 2, 4, 8, 16, 24 or 32</li>
</ul>
Returns the pixel value at offset <code>x</code> in scanline <code>y</code> in the receiver's data.
@param x the x position of the pixel to get @param y the y position of the pixel to get @return the pixel at the given coordinates
@exception IllegalArgumentException <ul> <li>ERROR_INVALID_ARGUMENT - if either argument is out of bounds</li> </ul> @exception SWTException <ul> <li>ERROR_UNSUPPORTED_DEPTH if the depth is not one of 1, 2, 4, 8, 16, 24 or 32</li> </ul>