2005-11-03 Tor Lillqvist <tml@novell.com>
* gdk/win32/gdkcursor-win32.c: As there is only one GdkDisplay in
the Win32 backend, check that GdkDisplay* parameters are equal to
_gdk_display instead of using the unnecessarily general
GDK_IS_DISPLAY().
2005-11-03 Tor Lillqvist <tml@novell.com>
* gdk/win32/gdkcursor-win32.c (pixbuf_to_hbitmaps_alpha_winxp):
Rename the variables for the color bitmap to have "color" in their
name, for similarity with pixbuf_to_hbitmaps_normal(). Create a
color bitmap for the mask, too, instead of creating a b&w bitmap
with CreateBitmap(). Set up the mask bitmap's contents, ones for
those pixels in the color bitmap where the alpha is zero, zero for
other pixels. We used to use an unitialized mask bitmap! This
meant that icons and cursors created presumably worked more or
less by accident. Totally blank icons with zero alpha everywhere
(as used by gtktrayicon.c) definitely did not work as expected.
2005-11-02 Tor Lillqvist <tml@novell.com>
* gdk/win32/gdkcolor-win32.c
* gdk/win32/gdkscreen-win32.c
* gdk/win32/gdkwindow-win32.c: Whitespace consistency
fixes. Remove superfluous test for GdkWindow* parameters being
non-NULL. Testing GDK_IS_WINDOW() is enough. As there is only one
GdkScreen and one GdkDisplay in the Win32 backend, use those
variables instead of the getter functions. For GdkDisplay* and
GdkScreen* parameters, check that they are equal to the
corresponding singleton variables instead of the more general
GDK_IS_DISPLAY() or GDK_IS_SCREEN().
2005-11-01 Tor Lillqvist <tml@novell.com>
* gdk/win32/gdkprivate-win32.h
* gdk/win32/gdkglobals-win32.c
* gdk/win32/gdkmain-win32.c (_gdk_windowing_init): Add more
pre-interned GdkAtoms and pre-registered clipboard formats. Sort
their declarations, definitions and assignments into a more
logical and consistent order.
* gdk/win32/gdkmain-win32.c (_gdk_win32_cf_to_string): Include the
CF_ prefix for the predefined clipboard format names. Put quotes
around registered format names to distinguish them.
* gdk/win32/gdkproperty-win32.c (gdk_property_change): Return
immediately with a warning if the property type is STRING, TEXT,
COMPOUND_TEXT or SAVE_TARGETS, as these are X11-specific that we
should never pretend to handle on Win32. Handle only UTF8_STRING
here, other formats with delayed rendering. Use \uc1 instead of
\uc0 when generating Rich Text Format for easier testability on
XP, where WordPad misinterprets \uc0 encoded characters. Add more
GDK_NOTE debugging output for Clipboard operations.
* gdk/win32/gdkselection-win32.c: Debugging printout improvements.
(gdk_selection_convert): Don't pretent to handle STRING, just
UTF8_STRING. Streamline error handling, don't unnecessarily have a
GError which then isn't used for anything anyway if it gets set.
(gdk_win32_selection_add_targets): Skip also STRING, TEXT,
COMPOUND_TEXT and SAVE_TARGETS in addition to UTF8_STRING.
2005-10-14 Tor Lillqvist <tml@novell.com>
* gdk/win32/gdkdisplay-win32.c: Remove the clipboard viewer code.
It didn't really do anything useful, and was just confusing and
incomplete. Comments claimed we don't do delayed rendering, but in
fact we do, for images. (The delayed rendering code has other
problems, though, see #168173.) The clipboard viewer code was
probably even buggy (the WM_CHANGECBCHAIN handled didn't propagate
the message when necessary). It was just test code, it said so in
a comment. Add something similar back later if necessary.
(_win32_on_clipboard_change,
_gdk_win32_register_clipboard_notification): Remove.
(gdk_display_supports_selection_notification,
gdk_display_request_selection_notification): Always just return
FALSE. We didn't generate any GDK_OWNER_CHANGE events anywhere.
2005-10-13 Tor Lillqvist <tml@novell.com>
* gdk/win32/gdkevents-win32.c (gdk_event_translate): Don't treat
Alt-Enter specially. It does not have any special meaning and
should be passed on to the application. (#318378, Tim Evans)
2005-10-13 Tor Lillqvist <tml@novell.com>
Set visual depth to 24 for 32 bits-per-pixel devices on
Win32. This allows gdk_drawable_real_draw_pixbuf() to use the
optimized composite_0888() function rather than the slower image
dithering functions to draw pixbufs (#313993, John Ehresman)
* gdk/win32/gdkimage-win32.c (_gdk_win32_new_image): Use
_gdk_windowing_get_bits_for_depth() to initialize
GdkImage::bits_per_pixel.
(_gdk_windowing_get_bits_for_depth): Return 32 bits for depth 24.
* gdk/win32/gdkpixmap-win32.c (gdk_pixmap_new): Use
_gdk_windowing_get_bits_for_depth() to initialize
BITMAPINFOHEADER::biBitCount.
* gdk/win32/gdkvisual-win32.c (_gdk_visual_init): Set
GdkVisual::depth to 24 even if GetDeviceCaps(BITSPIXEL) returns
32.
2005-10-01 Tor Lillqvist <tml@novell.com>
* gdk/win32/gdkdrawable-win32.c (blit_from_pixmap): In case
BitBlt() fails with ERROR_INVALID_HANDLE, the most probable cause
is that the the desktop isn't visible because the session has been
switched, the screen is locked, or a terminal server session
disconnected, so no error message necessary. (#137796)
It is of course remotely possible that BitBlt() failing with
ERROR_INVALID_HANDLE might also be caused by some other
problem. We could strive for perfection and track whether the
desktop is visible by using WTSRegisterSessionNotification() and
handling WM_WTSESSION_CHANGE. I think that's overdoing it just for
this issue, though. If we would track desktop visibility, we
should then avoid even trying to update the display at all while
the desktop isn't visible.
2005-09-26 Tor Lillqvist <tml@novell.com>
* gdk/win32/gdkwindow-win32.c (gdk_window_shape_combine_mask): Set
the shaped flag here, too. (#316871)
(gdk_window_shape_combine_region): Currently unimplemented, so
don't do anything to the shaped flag here.
2005-09-21 Tor Lillqvist <tml@novell.com>
* gdk/win32/gdkselection-win32.c (gdk_selection_convert,
gdk_text_property_to_text_list_for_display,
gdk_text_property_to_utf8_list_for_display,
gdk_win32_selection_add_targets,
_gdk_win32_selection_convert_to_dib): Free return value from
gdk_atom_name().
(gdk_text_property_to_text_list_for_display): Drop GError variable
that isn't actually used after being set.
2005-09-20 Tor Lillqvist <tml@novell.com>
* gdk/win32/gdkselection-win32.c
(gdk_selection_owner_get_for_display): Do return the correct owner
for CLIPBOARD (i.e., the owner of the Windows Clipboard, if it is
a window GDK knows about). The reason to return NULL seems to have
gone when in the fix for bug #163702 the artificial
GDK_SELECTION_CLEAR event generation was removed from
gdk_selection_send_notify_for_display(). Fixes bug #316552.
2005-09-18 Hans Breuer <hans@breuer.org>
* gdk/gdk.symbols gdk/win32/gdkwin32.h gdk/win32/gdkcursorwin32.c : export
_gdk_win32_pixbuf_to_hicon() as gdk_win32_pixbuf_to_hicon_libgtk_only()
* gtk/gtktrayicon-win32.c : a lot of debug spew but it has started to show
the icon and is blinking with teststatusicon. More to come ...
2005-09-18 Hans Breuer <hans@breuer.org>
* gtk/makefile.msc.in : fix typo for GTK_VER; define HAVE_CONFIG_H
cause gtkprogressbar.c has #include <config.h> conditionally; less
noise from generated gtk.def
* gtk/stock-icons/makefile.msc gdk/makefile.msc tests/makefile.msc : updated
* gtk/gtktrayicon-win32.c : dummy implmentation to make gtk compile.
For me it works as well as the *NIX implemenation, that is not at all.
* gdk/win32/gdkproperty-win32.c : implement gdk_atom_intern_static_string()
* gdk/win32/gdkwindow-win32.c(gdk_window_set_urgency_hint) : only use
only use (WINVER >= 0x0500) when available from the SDK. Otherwise fall
back to true dynamic linking of FlashWindowEx. Makes gtk+ work on NT4.0
again - if compiled properly.
* tests/teststatusicon.c : don't use GNOME icons for testing, but icons
already coming with Gtk+. Makes it compile on win32.
2005-09-09 Tor Lillqvist <tml@novell.com>
* gdk/win32/gdkdisplay-win32.c (gdk_display_get_name): Cache the
display name. There is only one GdkDisplay on Win32, and
constructing the display name isn't entirely trivial, so cacheing
is probably worth it. For instance GIMP calls this function a lot.
(gdk_display_open): Call gdk_display_get_name() to prime the
cached name.
(gdk_display_get_n_screens, gdk_display_get_screen,
gdk_display_get_default_screen): Verify parameter correctness like
the X11 backend does.
* gdk/win32/gdkscreen-win32.c (gdk_screen_make_display_name):
Return a freshly allocated string, as the API specifies. Fixes a
heap corruption problem that caused random errors and crashes in
GIMP, for instance.
2005-09-02 Tor Lillqvist <tml@novell.com>
* gdk/win32/gdkevents-win32.c (gdk_event_translate): Keep track of
cursor position also in root window coordinates. Prune out
superfluous WM_MOUSEMOVE messages even earlier, based on root window
coordinates. Windows sends WM_MOUSEMOVE messages after a new
window has ben mapped below the cursor even if the mouse doesn't
move. We used to generate GDK_MOTION_NOTIFY in these cases. This
confused at least gtk_menu_motion_notify(). (#314995)
* gtk/gtkintl.h: No need to include config.h here. It caused
warnings about GTK_LOCALEDIR being redefined on Win32 when
compiling files where gtkintl.h is included after gtkprivate.h
(which #undefines and re-#defines GTK_LOCALEDIR on Win32).
* gtk/gtkplug.c: Include config.h.
2005-08-09 Owen Taylor <otaylor@redhat.com>
* configure.in: Strip out all Xft, FreeType, and pangoxft checking.
Rewrite X checks to use pkg-config as much as possible.
* gdk/win32/gdkfont-win32.c (gdk_font_from_description_for_display): Make
this return Arial always to avoid using PangoWin32FontMap. (X11 backend
has always been returned "fixed" for a long time)
* gdk/linux-fb/gdkdrawable-fb2.c: Remove draw_glyphs() implementations,
fall through to the default implementation in terms of Cairo.
* gdk/linux-fb/gdkdrawable-fb2.c (gdk_fb_draw_text): Use gdk_draw_glyphs()
on the wrapper rather than gdk_fb_draw_glyphs()
2005-07-29 Tor Lillqvist <tml@novell.com>
* gdk/win32/gdkevents-win32.c: Remove ifdeffed out code relating
to the gdk-ping message. Use the global _gdk_display instead of
calling gdk_display_get_default() which would return _gdk_display
anyway.
(append_event, apply_filters, gdk_event_translate): Drop any
GdkDisplay parameter as we only have one display anyway. Use
_gdk_display where needed.
(gdk_event_apply_filters): Delete, move the code into its only
caller, apply_filters().
(generate_button_event): Factor out code from two places in
gdk_event_translate().
(gdk_event_translate): Call generate_button_event() in place of
inline code.
2005-07-29 Tor Lillqvist <tml@novell.com>
* gdk/win32/gdkevents-win32.c (generate_grab_broken_event): New
static function to generate and append the GDK_GRAB_BROKEN events.
(gdk_pointer_grab, gdk_keyboard_grab): Generate grab broken events
when overriding a grab inside the application, like in the X11
backend. Final bits of the fix for #107320, hopefully.
(print_event): Handle also GDK_SETTING, GDK_OWNER_CHANGE and
GDK_GRAB_BROKEN events.
(gdk_event_translate): Call generate_grab_broken_event() in place
of inline code.
2005-07-29 Tor Lillqvist <tml@novell.com>
* gdk/win32/gdkdrawable-win32.c (blit_inside_drawable): Rename
from blit_inside_window(), as it now does blitting inside a
bitmap, too. No code change, still just call BitBlt().
(_gdk_win32_blit): Check for source equalling destination
first. (#169508, #131977)
Do away with the superfluous local draw_impl variable, the
parameter to this function is already a GdkDrawableImplWin32*, no
need to copy and cast it.
2005-07-28 Robert Ögren <gtk@roboros.com>
Avoid spurious core pointer events when the tablet pen is lifted.
(#167000)
* gdk/win32/gdkinput-win32.c (set_ignore_core): New static function,
handles delayed unsetting of _gdk_input_ignore_core.
(_gdk_input_other_event): Call set_ignore_core instead of setting
_gdk_input_ignore_core directly.
2005-07-21 Tor Lillqvist <tml@novell.com>
* gdk/win32/gdkwindow-win32.c (gdk_window_set_title): Use
wide-char API when available. (#311079, Peter Zelezny)
2005-07-18 Tor Lillqvist <tml@novell.com>
* configure.in (GDK_EXTRA_LIBS): [Win32] Bypass libtool, use
-Wl,-luuid. This avoids a libtool warning as libuuid is static.
* gdk/win32/gdkgc-win32.c (gdk_win32_hdc_get): Be sure to remove
any possible leftover clipping region in the DC if we don't want
any clipping. Thanks to Robert Ögren. (#309823)
2005-07-13 Robert gren <gtk@roboros.com>
Fix handling of Aiptek and Aiptek-like graphical tablets such as Trust
on Windows. (#167004, thanks to "pnohant" for testing)
Code cleanup: Remove the unused and unmaintained code for using a
non-system tablet context (USE_SYSCONTEXT ifdef:s), suggested
by Tor Lillqvist.
* gdk/win32/gdkinput-win32.c (_gdk_input_wintab_init_check): Handle
tablet drivers that don't support WTI_DDCTXS/WTI_DSCTXS gracefully.
Sligthly reorganize and simplify the code to support this.
(_gdk_input_wintab_init_check, _gdk_input_other_event): Remove
USE_SYSCONTEXT ifdef:s and the code for the case it was not defined.
(gdk_input_window_find_within): Removed.
2005-07-09 Tor Lillqvist <tml@novell.com>
* configure.in: Look for windres on Win32.
* gdk-pixbuf/Makefile.am
* gdk/win32/rc/Makefile.am
* gdk/Makefile.am
* gtk/Makefile.am: Don't use the scripts in build/win32 to compile
the rc files into resource object files. (This means we lose the
build number increment magic, but I doubt it was that useful
anyway.) Instead use windres directly. To pass a normal .o file
produced by windres through libtool, which would want a .lo file,
pass it directly to the linker using a -Wl option.
* gdk-pixbuf/gdk_pixbuf.rc.in
* gdk/win32/rc/gdk.rc.in
* gtk/gtk-win32.rc.in: Replace BUILDNUMBER with 0.
2005-07-06 Tor Lillqvist <tml@novell.com>
* gdk/win32/gdkcursor-win32.c
(gdk_win32_icon_to_pixbuf_libgtk_only): Don't create the GdkPixbuf
until we know that we have something to put in it.
2005-07-06 Tor Lillqvist <tml@novell.com>
* gdk/win32/gdkcursor-win32.c: Add comment about the current named
cursor implementation, and what it maybe really should do.
(gdk_win32_icon_to_pixbuf_libgtk_only): New function, code moved
here from gtk/gtkfilesystemwin32.c:extract_icon().
(gdk_cursor_get_image): Use
gdk_win32_icon_to_pixbuf_libgtk_only().
* gdk/gdk.symbols
* gdk/win32/gdkwin32.h: Declare gdk_win32_icon_to_pixbuf_libgtk_only().
* gtk/gtkfilesystemwin32.c (extract_icon): Use
gdk_win32_icon_to_pixbuf_libgtk_only().
2005-07-03 Hans Breuer <hans@breuer.org>
* **/makefile.msc[.in] : updated
* gtk/gtkiconcache.c : <io.h> for open()
* gtk/gtkstyle.c : use G_PI instead of M_PI
* gdk/win32/gdkcursor-win32.c : implement gdk_cursor_new_from_name()
by mapping the lower case win32 api name to the respective cursor.
E.g. pass "wait" to get the IDC_WAIT cursor. Also allows to load
cursors from named resources in the executable.
(gdk_cursor_get_image) : just return NULL for now.
* gdk/win32/gdkgeometry-win32.c : implement gdk_window_move_region()
by delegation to ScollWindowEx(), untested.
* gdk/win32/gdkwindow-win32.c : stub for gdk_window_set_urgency_hint()
2005-06-27 Matthias Clasen <mclasen@redhat.com>
* gtk/gtkmenushell.c (gtk_menu_shell_grab_broken): Ignore
GrabBroken events which are caused by overgrabbing inside
the application; menus rely on these for their operation.
* gdk/gdkevents.h (struct _GdkEventGrabBroken): Add a
grab_window field.
* gdk/win32/gdkevents-win32.c (gdk_event_translate): Set
grab_window to NULL when generating GrabBroken events for
WM_KILLFOCUS messages.
* gdk/x11/gdkmain-x11.c (_gdk_xgrab_check_unmap)
(_gdk_xgrab_check_destroy): Set grab_window to NULL when
generating GrabBroken events when the grab window becomes
unviewable or is destroyed.
* gdk/x11/gdkmain-x11.c (gdk_pointer_grab, gdk_keyboard_grab):
Generate GrabBroken events when overriding a grab inside
the application. In this case, set grab_window to the new
grab_window.
2005-06-25 Matthias Clasen <mclasen@redhat.com>
Add a GrabBroken event to GDK, and a grab-broken-event
signal to GtkWidget. (#107320, Simon Cooke, initial patch
by John Ehresman)
* gdk/gdkevents.h: Add a GDK_GRAB_BROKEN event type,
define a GdkEventGrabBroken event struct.
* gdk/win32/gdkevents-win32.c (gdk_event_translate):
Generate GrabBroken events in response to WM_KILLFOCUS.
* gdk/x11/gdkmain-x11.c: Generate GrabBroken events
when a grab is broken by the window becoming unviewable,
or by another grab from the same client.
* gtk/gtkwidget.h (GtkWidgetClass): Add grab_broken_event.
* gtk/gtkwidget.c (gtk_widget_event_internal): Translate
GrabBroken events into grab_broken_event signals.
* gtk/gtkmain.c (gtk_main_do_event): Propagate GrabBroken
events.
* gtk/gtkmenushell.c (gtk_menu_shell_grab_broken): Deactivate
the menu when the grab is broken.
* gtk/gtkcolorsel.c (gtk_color_selection_grab_broken): Stop
the color picker if the grab is broken.
* gtk/gtkpaned.c (gtk_paned_grab_broken): Stop the drag if
the grab is broken.
2005-06-23 Tor Lillqvist <tml@novell.com>
Improve and simplify line segment rendering on Win32, especially
the implementation of GDK_CAP_NOT_LAST, and dashed lines. Fixes
bug #306396.
* gdk/win32/gdkprivate-win32.h (GdkGCWin32): Save the GdkGC's
line_style, cap_style and join_style as such in the
GdkGCWin32. Don't need to keep the pen_double_dash flag, we can
check the line_style.
* gdk/win32/gdkgc-win32.c (fixup_pen): New internal function. Sets
up the GDI pen type, style, end cap and join attributes to use
based on the pen width, GDK line style, end cap style, and join
style.
For a narrow (zero-width) GDK pen with the GDK_CAP_NOT_LAST end
cap style, which typically are used for XOR drawing where it is
essential that the last pixel is not drawn, use a GDI cosmetic
pen. Only for a cosmetic pen does GDI not draw the last pixel. I
deduced this by experimetation, the documentation is rather vague.
For other GDK pens use a geometric GDI pen. If the width is 0 or 1
and the GDK end cap style is GDK_CAP_BUTT, and the line style is
GDK_LINE_SOLID, use PS_ENDCAP_ROUND. This ensures that also
single-pixel length lines are drawn. (For sngle-pixel width lines
roundness as such is of course irrelevant.) For dashed lines, use
PS_ENDCAP_FLAT.
For wide lines use PS_ENDCAP_FLAT, _ROUND or _SQUARE,
respectively, for GDK_CAP_BUTT, GDK_CAP_ROUND and GDK_CAP_PROJECTING.
For one pixel on-off dashed lines, use PS_ALTERNATE, it seems to
work better than PS_USERSTYLE. For other dashed lines, use
PS_USERSTYLE and the dashes as set by the user (or the default
four-pixel on-off style).
(gdk_win32_gc_values_to_win32values, gdk_win32_gc_set_dashes):
Call fixup_pen() to do the pen settings after modifying some of
the GDK GC attributes that affect pens.
* gdk/win32/gdkdrawable-win32.c (render_line_horizontal,
render_line_vertical, draw_segments): Check GdkGCWin32::line_style
instead of the the removed pen_double_dash member. Don't use
PATCOPY unconditionally in the PatBlt() call, use a raster ope
code that depends on the GC function in use.
(draw_rectangle, draw_segments, draw_lines): Be more careful in
deciding when to do the manual dash rendering.
(draw_segments): Don't do any manual "last point" drawing at
all. The above changes takes care of narrow line segments being
drawn correctly in most cases, at least on NT-based Windows.
2005-06-17 Tor Lillqvist <tml@novell.com>
* gdk/win32/gdkdnd-win32.c (gdk_dropfiles_filter): Set the actions
and suggested_action fields in the GdkDragContext to
GDK_ACTION_COPY. Otherwise apps that check the suggested_action
field, like eog, won't accept dropped files.
2005-06-05 Tor Lillqvist <tml@novell.com>
* gdk/win32/gdkscreen-win32.c
(_gdk_windowing_substitute_screen_number): Return NULL unless
screen number is zero. We have only one screen on Win32.
(gdk_screen_make_display_name): Call gdk_display_get_name() and
return that.
2005-06-04 Tor Lillqvist <tml@novell.com>
* gdk/win32/gdkcursor-win32.c
* gdk/win32/gdkwindow-win32.c
* gdk/win32/gdkprivate-win32.h: Support full-colour cursors.
Support cursors with alpha on XP. Use code in common with the
support for alpha icons that already was present. (#306101, Tim
Evans)
2005-05-26 Tor Lillqvist <tml@novell.com>
* gdk/win32/gdkdrawable-win32.c (_gdk_win32_blit): If blitting
from the root window, take the multi-monitor offset into
account. (#305511)
2005-05-24 Tor Lillqvist <tml@novell.com>
* gdk/win32/gdkproperty-win32.c (gdk_screen_get_setting): Handle
gtk-alternative-button-order (setting it to TRUE).
2005-05-23 Tor Lillqvist <tml@novell.com>
* gdk/win32/gdkkeys-win32.c (handle_dead): If the keysym isn't one
of the special cases this function takes care of, us it as
such. This takes care of for instance the Bengali Virama, see bug
#165723.
2005-05-18 Tor Lillqvist <tml@novell.com>
* gdk/win32/gdkevents-win32.c
* gdk/win32/gdkkeys-win32.c
* gdk/win32/gdkprivate-win32.h: Check the KF_EXTENDED bit in
lParam of WM_KEY* messages to distinguish between left and right
Control and Alt keys. Unfortunately, the right Shift key doesnt
set KF_EXTENDED, so to distinguish between left and right Shift
keys, check the scan code. (#304584)
2005-05-10 Tor Lillqvist <tml@novell.com>
* gdk/win32/gdkproperty-win32.c (gdk_screen_get_setting): Check
that GDK_IS_SCREEN(screen) (like the X11 backend does), not screen
== gdk_screen_get_default(), as that might return NULL when this
function is called.
2005-05-09 Owen Taylor <otaylor@redhat.com>
* gdk/gdkrgb.c (gdk_rgb_convert_0888_br, gdk_rgb_convert_8880_br):
Fill in unused bits so they can be used for the depth-32 target case.
Rewrite so that that gives a marginal speedup rather than a
marginal slowdown. (on x86)
* gdk/gdkscreen.h gdk/x11/gdkscreen-x11.[ch] gdk/x11/gdkvisual-x11.c:
Add gdk_screen_get_rgba_colormap/visual to get a visual for
windows with an alpha channel, if one exists.
* gdk/win32/gdkscreen-win32.c gdk/linux-fb/gdkscreen-fb.c:
Stub out gdk_screen_get_rgba_colormap/visual.
* gdk/x11/gdkcolor-x11.c (gdk_colormap_alloc_colors): computation of
"unused" wasn't right for depth == 32, since it depended on
shifting by 32.
* gdk/gdkrgb.c: Fill in alpha bits with 1s. (Based on patch from
Keith Packard,
http://mail.gnome.org/archives/gtk-devel-list/2004-June/msg00080.html)
* gdk/x11/gdkdrawable-x11.c (gdk_x11_drawable_get_picture):
Implement again, without using Xft.
* tests/testgtk.c: Add a test for windows with an alpha channel.
