Re: Using GdkPixbuf buffers with GraphicsMagick
The data of a GdkPixbuf is layed out as a continous allocated chunk of memory in one of the following format RGBRGBRGB for 24-bit images, or RGBARGBARGBA, for 32-bit images, where R,G,B,A stands for the red, green, blue, and alpha components respectively. Lines may be also padded to row_stride bytes. Since you don't describe what GraphicsMagic() expects and how you extracts the relevent info from the pixbuf, it is impossible to say what went wrong. In any case you can use any library, e.g. cairo, agg, OpenCV, or access the pixels straight in the GdkPixbuf. Regards, Dov 2009/1/6 Luka Napotnik luka.napot...@gmail.com Hello. I'm trying to use GraphicsMagic (the successor of ImageMagick) to manipulate a GdkPixbuf image buffer. The problem is that the program segfaults, probably due to the raw nature of the buffer which the Magick API doesn't handle very good. I'm opening the image buffer with MagickReadImageBlob() and then apply some filters. Does anyone have experiences using GdkPixbuf together with GraphicsMagick or can anyone suggest alternatives to GraphicsMagick which works well with GdkPixbuf? Greets, Luka ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Using GdkPixbuf buffers with GraphicsMagick
2009/1/6 Luka Napotnik luka.napot...@gmail.com: Well I need a dither filter for my image buffer. That's why I'm looking at GraphicsMagick. Oh, OK, vips does not have any dithering operations. I guess you know about GdkPixbuf's dithering? John ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Using GdkPixbuf buffers with GraphicsMagick
Hum could you please tell me more about gdkpixbuf dithering functions. I was unable to fund such a function. Greets, Luka Dne 06.01.2009 (tor) ob 12:06 + je jcup...@gmail.com zapisal(a): 2009/1/6 Luka Napotnik luka.napot...@gmail.com: Well I need a dither filter for my image buffer. That's why I'm looking at GraphicsMagick. Oh, OK, vips does not have any dithering operations. I guess you know about GdkPixbuf's dithering? John -- lp, Luka ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Using GdkPixbuf buffers with GraphicsMagick
2009/1/6 Luka Napotnik luka.napot...@gmail.com: Hum could you please tell me more about gdkpixbuf dithering functions. I was unable to fund such a function. Just that it'll dither for you when drawing to the display. So if your graphics card is 16 bits per pixel (eg. 6 bits of green, 6 red, 4 blue or whatever), gdk will dither your 24-bit RGB image down for you. It'll do palette-ized visuals as well. http://library.gnome.org/devel/gdk/stable/gdk-Pixbufs.html But perhaps you want to dither for some other reason? John ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Generic character types of gregex are unrecognised
On Wed, 2009-01-07 at 02:00 +0900, tks wrote: [...] reg = g_regex_new (\d\D\s\S\w\W, 0, 0, error); Watch out that \ is special in C strings, so you need \\d\\D etc. Liam -- Liam Quin - XML Activity Lead, W3C, http://www.w3.org/People/Quin/ Pictures from old books: http://fromoldbooks.org/ Ankh: irc.sorcery.net irc.gnome.org www.advogato.org ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
gtk_main_iteration() exits app first time through
Hey All, Some months ago, I asked how to make a modeless dialog (a progress dialog) appear while continuing to execute in the main thread. Someone (thanks!) suggested using while (gtk_events_pending()) gtk_main_iteration(); to make sure the new dialog gets shown. I implemented that and it worked great for the last 6 months or so. Just today, I noticed that the program exits the first time it calls gtk_main_iteration(); Does anyone know what happened? TIA -Garth -- Garth Upshaw Garth's KidStuff ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
rc file parsing help needed
I'd be happy to be pointed to the appropriate fine manual to read, but I haven't found anything yet that helps. The problem showed up running Balsa on a non-Gnome system. Many of the icons don't show up, and could not load image: Icon 'balsa_mbox_out' not present in theme shows up as the error message. We figured out it was probably some missing part of gnome that normally got this resolved. In fact, running the gnome-control-center and selecting a theme does fix the problem until a restart of X. After lots of hunting, the Balsa team (thanks, guys) figured out the easiest fix was just to create ~/.gtkrc-2.0 with the single line 'gtk- icon-theme-name = gnome' although I have since figured out that 'gtk- fallback-icon-theme = gnome' also works. In looking for a more automatic solution, we figured that calling gtk_rc_parse_string with one of the above strings should have the same effect. Unfortunately, we have tried several variations, all with no apparent effect. I have even tried renaming ~/.gtkrc-2.0 to another name so it is not automatically recognized, and then calling gtk_rc_parse(new file name) but again - no effect. Is there something obvious we might be missing? Is there something particular about when during app startup the parse function needs to be called to have an effect? Any other hints or suggestions would be appreciated. Thanks. Jack ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
