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<TITLE> [Gtk-sharp-list] Problem with Pixbuf
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<H1>[Gtk-sharp-list] Problem with Pixbuf
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<B>Sebastian
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</B>
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<A HREF="mailto:scut%40nb.in-berlin.de"
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TITLE="[Gtk-sharp-list] Problem with Pixbuf">scut@nb.in-berlin.de
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</A><BR>
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<I>Mon, 26 Apr 2004 09:34:31 +0800</I>
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<LI> Next message: <A HREF="003935.html">[Gtk-sharp-list] bitmap question
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<!--beginarticle-->
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<PRE>Hi Olafur,
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On Sun, Apr 25, 2004 at 06:43:29PM +0100, Olafur Arason wrote:
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><i> I'm trying to use the pixels functionality of Pixbuf and using p = pixels
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</I>><i> + y * rowstride + x * n_channels to get the color, but in gtk-sharp the
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</I>><i> values are copied not linked. So the problem is that I have is a copy of
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</I>><i> pixles not the direct Pixbuf image, so to get the data into Pixbuf I have
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</I>><i> to have a cvs version of Pixbuf and do a pixbuf = new Pixbuf(-1, pixels,1)
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</I>><i> but this may be a stupit question but I'm new to c# how do you change
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</I>><i> byte* to byte[].
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</I>
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I use something like this (pbuf being a Gdk.Pixbuf):
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pbuf.Pixels[y * pbuf.Rowstride + x * pbuf.NChannels + 0] = 255;
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pbuf.Pixels[y * pbuf.Rowstride + x * pbuf.NChannels + 1] = 0;
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pbuf.Pixels[y * pbuf.Rowstride + x * pbuf.NChannels + 2] = 0;
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to set the pixel at (x, y) to red for example.
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I found that updating the pixbuf is no problem, just schedule a QueueDraw
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for the Gtk.Image widget on top of it.
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><i> Olafur Arason
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</I>
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ciao,
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Sebastian
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--
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|\ _,,,--,,_ ,) <A HREF="mailto:scut@nb.in-berlin.de">scut@nb.in-berlin.de</A>, <A HREF="http://segfault.net/~scut/pgp">http://segfault.net/~scut/pgp</A>
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/,`.-'`' -, ;-;;' 5453 AC95 1E02 FDA7 50D2 A42D 427E 6DEF 745A 8E07
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_ |,4- ) )-,_ ) /\__________________________________________________________
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~'---''(_/--' (_/-'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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</PRE>
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