Re: [gtk-list] Problems manipulating GdkImage objects

[Arthur Jerijian <lightmanaj earthlink net>]

You can take a look at the source code to the GdkMagick library
(http://home.earthlink.net/~lightmanaj/GdkMagick). You will find some pixel
manipulation mathematics in the gdk_magick_private.h header file and their
usage in the gdkmagick_render.c file. I cover all six visual types in my code.

Thanks,
--Arthur

On Fri, 26 Nov 1999, AVILA BERMEJO, FRANCISCO JOSE wrote:
> 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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