Re: Re: Re: gdk_draw_layout seems that it doesn't make damage event for offscreens.
- From: Bo-Ram Park <boram1288 park samsung com>
- To: Alexander Larsson <alexl redhat com>
- Cc: "gtk-devel-list gnome org" <gtk-devel-list gnome org>
- Subject: Re: Re: Re: gdk_draw_layout seems that it doesn't make damage event for offscreens.
- Date: Wed, 09 Dec 2009 09:45:50 +0000 (GMT)
Title: Samsung Enterprise Portal mySingle
Then, Drawing with GdkPangoRenderer can make damage events everytime.
That's much better way. I agree with you.
Best regards
Boram
-------
Original Message -------
Sender : Alexander Larsson<alexl redhat com>
Date : Dec 09, 2009 17:19 (GMT+09:00)
Title : Re: Re: gdk_draw_layout seems that it doesn't make damage event for
offscreens.
On Tue, 2009-12-08 at 18:31 +0000, 박보람 wrote:
> Yes, the double buffering handling does generate damage events.
>
> Then, nomally widgets maybe doesn't have this kind of problem.
>
>
>
> But "gtkperf" app draws layout to window directly in
> on_idle_gtkdrawingarea_text_test ( ).
>
> (I attached "test.c" of "gtkperf" which includes
> "on_idle_gtkdrawingarea_text_test ( )")
>
> So, this problem happens.
Yes, any kind of direct drawing to the window via cairo or
gdk_draw_layout() will cause this problem. However, such operations are
not that common.
> To resolve this problem, isn't it good approach to add draw_layout,
> draw_layout_line_with_colors
>
> and draw_layout_with_colors to "struct _GdkDrawableClass" ?
Thats not really required. All these drawing operations will pass
through GdkPangoRenderer which could be modified to create damage events
when drawing directly to a window. I.E:
gdk_pango_renderer_draw_glyphs
gdk_pango_renderer_draw_rectangle
gdk_pango_renderer_draw_error_underline
gdk_pango_renderer_draw_shape
--
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Alexander Larsson Red Hat, Inc
alexl redhat com alexander larsson gmail com
He's an uncontrollable crooked sorceror haunted by an iconic dead American
confidante She's a vivacious hypochondriac single mother with the power to
bend men's minds. They fight crime!
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