On Fri, 2007-11-30 at 11:31 +0000, [EMAIL PROTECTED] wrote: > On Nov 30, 2007 2:45 AM, Bin Chen <[EMAIL PROTECTED]> wrote: > > image, but I am not familiar with XLib, so I want to know if it is > > possible to use pure GTK+ API to achieve this? What about the > > performance comparing to use XLib directly? > > You can use gdk_draw_rgb_image() to paint an RGB array to the screen: > > http://library.gnome.org/devel/gdk/unstable/gdk-GdkRGB.html#gdk-draw-rgb-image > > This is a wrapper over the XImage functions, including XShm when > available, plus some nice dithering code. It's about as quick as you > can get with vanilla X11 calls. There's a tiny program in > gtk+-2.x.x/tests/testrgb.c which benchmarks your computer for drawing > speed with his operation. You could try that and see if it's going to > be quick enough for you. > > If you want to go faster, you need to use another (non-X11) rendering > path. One possibility is the Xv extension, another is to go via > OpenGL. Both are somewhat hairy :-( and much less portable. As Ken > says, unless you really want to do this all yourself, GStreamer might > be the way to go.
Do you know how you get the video memory address of the gdk drawable? I want to use memcpy to do the copying, because the gdk-draw-rgb-image can't be accessed during two different threads. Thanks. Bin _______________________________________________ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
