True transparency in Xgl/AIGLX

[mdw]

The subject says it all; pseudotransparency looks just weird in an environment with real window translucency.

mdw

[peterz]

[quote00cf42="mdw"]The subject says it all; pseudotransparency looks just weird in an environment with real window translucency.

mdw[/quote00cf42]

Sounds good. Which distros & versions have Xgl now?

[mdw]

[quote5bea4e]Sounds good. Which distros & versions have Xgl now?[/quote5bea4e]

Mandriva 2007 and SuSE 10.1 at this moment, with more to come. Mandriva even has live CD called Mandriva One with Xgl/AIGLX/Compiz. gnome-terminal and rxvt-unicode have native support for true transparency.

mdw

[funkyhat]

Ubuntu 6.10 (possibly 6.06 too actually...)
Gentoo
Probably most of the major distros have it as an option now as it's been around for quite a while...
The method could probably be copied from the gnome-terminal app.

[funkyhat]

Just giving this a bump...

Ubuntu 7.04 is to have composite support installed by default, Mandriva has had composite for a long time. All other main distros can configure composite relatively easily if it's not already done.

I'll post a screenshot of gnome-terminal with translucency set if anyone's interested but can't be bothered to play themselves

[veers]

Well, I've got a prototype up and running

[peterz]

Looking good. Looks like the only problem left is the background behind the text?
What's the speed like?

[veers]

I've fixed the issue with the text background.


The performance is good on my notebook using an Intel 945GM gpu.
At the moment everything is hardcoded. Disable your background image and transparent background/tinting before using the patch, at least on fedora core 6 you'll get a X11 error otherwise.

Anyway here is the patch:

Code: Select all

[veers@darkvault fe-gtk]$ cvs diff -u
? .gtkutil.c.swp
? Makefile.in
? xtext2.c
cvs diff: Diffing .
Index: gtkutil.c
===================================================================
RCS file: /cvsroot/xchat/xchat2/src/fe-gtk/gtkutil.c,v
retrieving revision 1.30
diff -u -r1.30 gtkutil.c
--- gtkutil.c   31 Jan 2007 07:25:35 -0000      1.30
+++ gtkutil.c   20 Mar 2007 17:30:25 -0000
@@ -523,6 +523,14 @@
        GtkWidget *win;

        win = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+    GdkScreen *screen;
+    GdkColormap *colormap;
+    screen = gtk_widget_get_screen(GTK_WIDGET(win));
+    colormap = gdk_screen_get_rgba_colormap(screen);
+    if(colormap != NULL && gdk_screen_is_composited (screen))
+    {
+        gtk_widget_set_colormap(GTK_WIDGET(win), colormap);
+    }
        gtkutil_set_icon (win);
#ifdef WIN32
        gtk_window_set_wmclass (GTK_WINDOW (win), "XChat", "xchat");
Index: xtext.c
===================================================================
RCS file: /cvsroot/xchat/xchat2/src/fe-gtk/xtext.c,v
retrieving revision 1.121
diff -u -r1.121 xtext.c
--- xtext.c     11 Dec 2006 02:52:42 -0000      1.121
+++ xtext.c     20 Mar 2007 17:30:27 -0000
@@ -4168,6 +4168,11 @@
                xtext->color[i].color.alpha = 0xffff;
                xtext->color[i].pixel = palette[i].pixel;
#endif
+        if(i==XTEXT_BG)
+        {
+            guint8* pixel = &palette[i].pixel;
+            pixel[3] = 0xdd;
+        }
                xtext->palette[i] = palette[i].pixel;
        }


Please give it a try. In the meantime I'll try to make it replace the existing transparent background functionality ...somehow.

[veers]

Code: Select all

[veers@darkvault fe-gtk]$ cvs diff -u
? .xtext.c.swp
? Makefile.in
cvs diff: Diffing .
Index: gtkutil.c
===================================================================
RCS file: /cvsroot/xchat/xchat2/src/fe-gtk/gtkutil.c,v
retrieving revision 1.30
diff -u -r1.30 gtkutil.c
--- gtkutil.c   31 Jan 2007 07:25:35 -0000      1.30
+++ gtkutil.c   21 Mar 2007 00:00:34 -0000
@@ -523,6 +523,14 @@
        GtkWidget *win;

        win = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+    GdkScreen *screen;
+    GdkColormap *colormap;
+    screen = gtk_widget_get_screen(GTK_WIDGET(win));
+    colormap = gdk_screen_get_rgba_colormap(screen);
+    if(colormap != NULL && gdk_screen_is_composited (screen))
+    {
+        gtk_widget_set_colormap(GTK_WIDGET(win), colormap);
+    }
        gtkutil_set_icon (win);
#ifdef WIN32
        gtk_window_set_wmclass (GTK_WINDOW (win), "XChat", "xchat");
Index: xtext.c
===================================================================
RCS file: /cvsroot/xchat/xchat2/src/fe-gtk/xtext.c,v
retrieving revision 1.121
diff -u -r1.121 xtext.c
--- xtext.c     11 Dec 2006 02:52:42 -0000      1.121
+++ xtext.c     21 Mar 2007 00:00:39 -0000
@@ -994,6 +994,15 @@
        gdk_window_set_user_data (widget->window, widget);

        xtext->depth = gdk_drawable_get_visual (widget->window)->depth;
+    if(xtext->depth == 32)
+    {
+        if(xtext->transparent)
+        {
+            guint8* pixel = &xtext->palette[XTEXT_BG];
+            pixel[3] = 0xdd;
+        }
+        xtext->transparent = FALSE;
+    }

        val.subwindow_mode = GDK_INCLUDE_INFERIORS;
        val.graphics_exposures = 0;
@@ -4283,6 +4292,28 @@

        if (trans && (xtext->tint_red != 255 || xtext->tint_green != 255 || xtext->tint_blue != 255))
                shaded = TRUE;
+    /* rgba mode */
+    if(xtext->depth == 32)
+    {
+        if(trans)
+        {
+            guint8* pixel = &xtext->palette[XTEXT_BG];
+            pixel[3] = 0xdd;
+        }
+        else
+        {
+            guint8* pixel = &xtext->palette[XTEXT_BG];
+            pixel[3] = 0xff;
+        }
+        xtext_set_fg (xtext, xtext->fgc, XTEXT_FG);
+        xtext_set_bg (xtext, xtext->fgc, XTEXT_BG);
+        xtext_set_fg (xtext, xtext->bgc, XTEXT_BG);
+        /* rgba mode breaks the old transparency mechanism
+         * X11 Bad Match. */
+        trans = FALSE;
+        shaded = FALSE;
+        pixmap = 0;
+    }

#if !defined(USE_XLIB) && !defined(WIN32)
        shaded = FALSE;


Now it replaces the pseudo transparency with the real one. Still pretty ugly but at least working.

[AccoGrayfox]

Hi, I know I'm probably going to be crucified for reviving a close-to-one-month old topic, but how exactly do you apply the patches? I've tried with my limited knowledge, but don't understand how it works. (or a simple .patch file would be nice )

[veers]

I'll upload a .patch file for you tomorrow/in some hours.

edit:
http://www.swiss-bash.ch/static/xchat-alpha.patch

to apply:
patch -u < xchat-alpha.patch

[atrus]

Anybody looking at this? (Reviving a year old thread, to say nothing of reviving a month old one...)

[DASPRiD]

I just tested it with the newest version of X-Chat, works fine. Should be integrated by default into the release version.

[kthxbye]

Hi.

How would I go about doing this? I've not a clue. I see the lil patch command but.. what do I do? >,<

[s0ulslack]

bump #69

Anyway to merge this patch and have an "true trans" GUI option if correct additions appear?