I've never used any gray scale images before, but I think the colorspace is the issue. In the gdk-pixbuf docs it says: "This enumeration defines the color spaces that are supported by the gdk-pixbuf library. Currently only RGB is supported." [1]
I realize it is far from optimal, but can you just convert up to rgb? Your other choice is Cairo maybe, but that doesn't look very likely either, same issue. [2] Don't know what to say except I'd probably just convert up. Anyone else have ideas? - John Hobbs [EMAIL PROTECTED] [1] http://library.gnome.org/devel/gdk-pixbuf/stable/gdk-pixbuf-gdk-pixbuf.html#GdkColorspace [2] http://www.cairographics.org/manual/cairo-Image-Surfaces.html#cairo-format-t On Sat, Sep 27, 2008 at 11:22 PM, simba simba <[EMAIL PROTECTED]>wrote: > Thanks John: > > I am using Gdk::Pixbuf::create_from_data(), it seems good except for some > one channel gray images. > > I have an array guint8 * data corresponds to a image, each pixel has 8-bits > (1 BYTE), when I use > create_from_data(), the show image is weired. it is duplicated 3 times. > > Gdk::Pixbuf::create_from_data( > (guint8*) data, > Gdk::COLORSPACE_RGB, > false, > depth, > width, > height, > width); > > Any sugguestion for this? > > sim > > > On Fri, Sep 26, 2008 at 4:10 PM, John Hobbs <[EMAIL PROTECTED]> wrote: > >> Don't know if this will help, but here is a snippet I use to draw straight >> onto the Gdk::Window (screen is a Gtk::Image in this case) >> >> <snip> >> screen.get_window()->draw_rgb_image( >> screen.get_style()->get_bg_gc(Gtk::STATE_NORMAL), >> 0, >> 0, >> width, >> height, >> Gdk::RGB_DITHER_NONE, >> (const guchar*) data, >> width*3 >> ); >> </snip> >> >> And here's one I use with pixbuf... >> >> <snip> >> Glib::RefPtr<Gdk::Pixbuf> pixbuf = Gdk::Pixbuf::create_from_data( >> (guint8*) data, >> Gdk::COLORSPACE_RGB, >> false, >> depth, >> width, >> height, >> width*3 >> ); >> </snip> >> >> Not sure if they are the "right" way to do it, but they work for me. >> >> - John Hobbs >> >> [EMAIL PROTECTED] >> >> On Fri, Sep 26, 2008 at 2:57 PM, simba simba <[EMAIL PROTECTED]>wrote: >> >>> Hi dear all: >>> >>> Now I have a image array, char * data. I know this array's length( >>> image's width and height) and array's format( RGB 32bits for a pixel or >>> Grayscale leve 8bits for a pixel). >>> >>> My question is how can I display this image array by using gtkmm? >>> >>> I have tried using Gtk::Pixbuf pixbuf.create_from_data(). >>> >>> But it is not good for me. Is there any example codes? >>> >>> Thanks a lot!! >>> >>> simba >>> >>> _______________________________________________ >>> gtkmm-list mailing list >>> [email protected] >>> http://mail.gnome.org/mailman/listinfo/gtkmm-list >>> >>> >> >> _______________________________________________ >> gtkmm-list mailing list >> [email protected] >> http://mail.gnome.org/mailman/listinfo/gtkmm-list >> >> >
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