Thanks Michael for you helpful reply. I have checked out the documentation for the GdkPixbuf at http://gtkmm.sourceforge.net/gtkmm2/docs/reference/html/classGdk_1_1Pixbuf.h tml and I cannot find any information about the image manipulation services that I require, Am I looking in the wrong spot? I've read up a bit on ImageMagick and I have found Magick++ (C++ API to ImageMagick) and if GdkPixbuf cannot perform the requested operations, I think I can use Magick++; it looks like I would have to encode my image first to a jpeg and let Magick++ load it (either from file or BLOB) and then it should be able to perform the operations. I hope it is as simple as linking this library with my app. Also, I have tried making a simple app like you suggested so I can get familiar with GTK/Glade--, however when I run my executable, no UI appears - it just hangs and nothing appears! I will investigate further. thanks again, amit. -----Original Message----- From: Michael Torrie To: 'gtk-list@xxxxxxxxx' Sent: 02/12/03 6:12 PM Subject: Re: New to GTK; some beginner questions. On Tue, 2003-12-02 at 12:23, Amit BHATNAGAR wrote: > Hi all. > > I am considering using GTK+ to develop an app for Solaris 8, and I > could use some help in answering some of my questions that would allow > me to make a decision on whether or not to use GTK+. I have searched > the FAQ & online docs, however if any of my questions have documented > answers that I failed to find, please point me in the right direction. > > The app that I would be creating would largely deal with viewing radar > images, and I would require to do some image manipulation, (zoom, pan, > filtering, contrast, brightness, display multiple images, edge detection, > mirror, etc). I would like to use GTKmm (and Glademm) as C++ would be > my primary development language of choice. > > #1 Does GTK provide an API that I can use to perform the above operations? > Since GTK is closely connected with GIMP, is it possible to use GIMP to > achieve this? (assuming that GIMP has an API). I have read the documentation > for GtkImage and even GdkPixmap, but nothing would suggest that image > manipulation is possible from these. GdkPixmap is going away. The replacement you should use is GdkPixbuf which has all kinds of functions for scaling and manipulation, including alpha-compositing of alpha-channel pixbufs. GdkPixbuf has built-in loaders for a variety of image formats and does let you manipulate it on a pixel level. You could then apply your own matrix transformations. You then typically draw the GdkPixbuf onto a GtkDrawingArea widget. > > #2 Is my only other alternative to use a library like ImageMagick to > perform these operations? Is there a GTK(mm) interface for this? I have > found GDKMagick but this seems to be very old (obsolete?). There is also > Magic++, but again I don't know how this integrates well within a GTK app. > Is there any better alternative than ImageMagick? GdkPixbuf works very well as I mentioned, but ImageMagick has been a very good library too (not to be confused with GdkImageMagick). I'm pretty sure ImageMagick can integrate with GTK. GtkMM has a full object-oriented version of GdkPixbuf which I've used before and it's quite workable. I think GTK and GTK-- would work very well for you. If you do a small test program to get familiar with the toolkit you should be able to determine if it has the vital features you need. Michael > > Thanks in advance for your assistance. > > amit. > > _______________________________________________ > > gtk-list@xxxxxxxxx > http://mail.gnome.org/mailman/listinfo/gtk-list -- Michael Torrie <torriem@xxxxxxxxxxxx> _______________________________________________ gtk-list@xxxxxxxxx http://mail.gnome.org/mailman/listinfo/gtk-list _______________________________________________ gtk-list@xxxxxxxxx http://mail.gnome.org/mailman/listinfo/gtk-list
