Thanks to Basilio's suggestion and Adrian's test with a new user profile
I was spurred into investigating this some more.
In System > Preferences > Advanced Desktop Effects Settings
In the Utility section, disabling "Resize Info" disables the effect.
With "Resize Info" enabled I played with the settings and discovered
that what is happening is that the size info is beinf drawn as black
text on a black background.
As soon as I altered the 'Text Color' setting to a colour that contrasts
with black, the characters are visible, although the inverted display
looks 'kludgy' and not like it used to be.
I've trawled through the changes just prior to the first time I noticed
the issue for compiz-fusion-plugins-main and pango1.0-0, and been
investigating cairo & pango since the crux of the issue is in
compiz-fusion-plugins-main/src/resizeinfo.c::updateTextLayer ()
where it does:
cr = is->textLayer.cr;
/* Clear the context. */
cairo_save (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
cairo_paint (cr);
cairo_restore (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
asprintf (&info, "%d x %d", xv, yv);
font = pango_font_description_new ();
layout = pango_cairo_create_layout (is->textLayer.cr);
pango_font_description_set_family (font,"Sans");
pango_font_description_set_absolute_size (font, 12 * PANGO_SCALE);
pango_font_description_set_style (font, PANGO_STYLE_NORMAL);
pango_font_description_set_weight (font, PANGO_WEIGHT_BOLD);
pango_layout_set_font_description (layout, font);
pango_layout_set_ellipsize (layout, PANGO_ELLIPSIZE_END);
pango_layout_set_text (layout, info, -1);
pango_layout_get_pixel_size (layout, &w, &h);
cairo_move_to (cr,
RESIZE_POPUP_WIDTH / 2.0f - w / 2.0f,
RESIZE_POPUP_HEIGHT / 2.0f - h / 2.0f);
pango_layout_set_width (layout, RESIZE_POPUP_WIDTH * PANGO_SCALE);
pango_cairo_update_layout (cr, layout);
cairo_set_source_rgba (cr,
*(color) / (float)0xffff,
*(color + 1) / (float)0xffff,
*(color + 2) / (float)0xffff,
*(color + 3) / (float)0xffff);
pango_cairo_show_layout (cr, layout);
pango_font_description_free (font);
g_object_unref (layout);
It could be that font description or something related to the drawing
mode used is causing the background of the glyphs to be drawn in
pango_cairo_show_layout(). It is possible this may end up being caused
by a change in Pango or Cairo that somehow upsets Compiz.
** Also affects: compiz-fusion-plugins-main (Ubuntu)
Importance: Undecided
Status: New
** Changed in: compiz-fusion-plugins-main (Ubuntu)
Importance: Undecided => Low
Assignee: (unassigned) => TJ (intuitivenipple)
Status: New => Confirmed
--
gnome-terminal resize legend displayed as blocks when Compiz is enabled
https://bugs.launchpad.net/bugs/145604
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