Problems manipulating GdkImage objects

["AVILA BERMEJO, FRANCISCO JOSE" <x2042949 fedro ugr es>]

Hi, I am making a program for image manipulation, and
I need to manipulate the image data. I know the functions
"gdk_image_set_pixel" and "gdk_image_get_pixel", but
I can get the real range of the image. I need the three RGB
components of each pixel, but I don“t know how I can do it.
I suppouse that if the images is grey scale and a pixel has the
values of 250, the RGB components will be (250,250,250). Isn't it?
But if a read a 250 value a get 65535. A little sample code will
be fine or simply the steps.

Thanks.

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