2007-11-09 Kristian Rietveld <kris@imendio.com>
* gdk/gdkwindow.c (gdk_window_process_all_updates): guard for
windows with GDK_WINDOW_DESTROYED set. (Fixes#482531, reported
by Sebastien Bacher).
svn path=/trunk/; revision=18975
2007-09-12 Kristian Rietveld <kris@imendio.com>
Fixes#426246.
* gdk/gdk.symbols:
* gdk/gdkwindow.[ch]
(gdk_window_freeze_toplevel_updates_libgtk_only),
(gdk_window_thaw_toplevel_updates_libgtk_only): new functions
to freeze a toplevel window and all its descendants. To be made
public in 2.14,
(gdk_window_schedule_update): return if toplevel is frozen,
(gdk_window_process_all_updates): defer processing updates if toplevel
is frozen.
* gtk/gtkwindow.c (gtk_window_configure_event): directly size
allocate for override redirect windows, freeze toplevel and
descendants otherwise and wait until resizing is done.
svn path=/trunk/; revision=18802
2007-08-08 Behdad Esfahbod <behdad@gnome.org>
* gdk/gdkwindow.c (gdk_window_invalidate_region): Use gtk_true
instead of rolling a new one. Patch from Xan Lopez.
svn path=/trunk/; revision=18595
2007-07-20 Ryan Lortie <desrt@desrt.ca>
* gtk/gtkwidget.c (gtk_widget_is_composited): add note that the
semantics of this call, when mixed with the new
gdk_window_set_composited(), will change in the future.
* gdk/x11/gdkevents-x11.c (gdk_event_translate): only grab Damage
events that belong to us.
svn path=/trunk/; revision=18506
2006-07-17 Matthias Clasen <mclasen@redhat.com>
* gdk/gdkwindow.c (gdk_window_get_pointer): Add some more
detail to the docs. (#311399, Nikos Kouremenos)
2006-05-30 Matthias Clasen <mclasen@redhat.com>
* gdk/gdkpixmap.c:
* gdk/gdkwindow.c: Don't use G_DEFINE_TYPE, since the instance
struct name does not match the type name. (#343453, Ed Catmur)
2006-04-11 Anders Carlsson <andersca@imendio.com>
* gdk/gdkinternals.h:
* gdk/gdkwindow.c:
(_gdk_paintable_get_type):
(gdk_window_begin_paint_region):
(gdk_window_end_paint):
(gdk_window_process_updates):
(gdk_window_invalidate_maybe_recurse):
Add new GdkPaintable interface which implementation objects can
implement in order to override gdk painting functions.
2006-02-03 Federico Mena Quintero <federico@ximian.com>
Work around https://bugs.freedesktop.org/show_bug.cgi?id=4320,
which used to be our own
http://bugzilla.gnome.org/show_bug.cgi?id=314616. If one uses a
pixmap for a pattern in Cairo, and sets the pattern to
CAIRO_EXTEND_REPEAT; and if the destination surface is also a
pixmap, Cairo does a slow copy instead of using XCopyArea(). So,
we use the same code that we used in GTK+ 2.6 (pre-cairo), by
filling the double-buffer pixmap with a tiled GC and
XFillRectangle().
* gdk/gdkwindow.c (BackingRectMethod): New structure with a
cairo_t and a GdkGC field. Depending on which of these fields
gets filled in, we'll use Cairo or GDK to clear the double-buffer
pixmap when painting a window.
(setup_backing_rect_method): Fill a BackingRectMethod as
appropriate, depending on the window's configuration and our
knowledge of whether Cairo is fast or slow when doing repeating
patterns.
(gdk_window_clear_backing_rect): Call
setup_backing_rect_method(). Depending on what it returns, use
Cairo to clear the double-buffer pixmap, or plain GDK.
2005-11-10 Michael Natterer <mitch@imendio.com>
Applied patch from maemo-gtk that addresses many issues wrt
display migration and display closing (bug #85715).
* gdk/gdkdisplay.c (gdk_display_dispose): don't just set the
default display to NULL when it's closed. Instead set the most
recently opened display as new default (if one exists).
* gdk/gdkpango.c (on_renderer_display_closed): fixed signature
of this callback.
* gdk/gdkscreen.c (gdk_screen_dispose): check if the GCs still
exist before unrefing them.
* gdk/gdkwindow.c (_gdk_window_destroy_hierarchy): if the screen
is closed, allow destruction of the root window.
* gdk/x11/gdkdisplay-x11.c: moved some stuff from finalize() to
dispose(), free stuff that was leaked before.
* gdk/x11/gdkevents-x11.c (_gdk_x11_events_uninit_screen): check if
the xsettings_client still exists before destroying it.
* gdk/x11/gdkkeys-x11.c: added finalization and free the allocated
X resources.
* gdk/x11/gdkpixmap-x11.c: moved stuff from finalize() to new
dispose() implementation.
* gdk/x11/gdkscreen-x11.c: moved stuff from finalize() to
dispose() and check if it still exists before unrefing it. Set
their pointers to NULL/None *after* upchaining in dispose(),
because X11 implementations of members of the parent class still
need them for their own destruction.
* gdk/x11/gdkvisual-x11.c: removed finalize() implementation which
was g_error()ing when finalizing a visual.
* gtk/gtkclipboard.c (gtk_clipboard_finalize): don't use
get_clipboard_widget() because it would create the widget if it
doesn't exist. Use g_object_get_data() directly instead.
* gtk/gtktextdisplay.c (on_renderer_display_closed): fixed signature
of this callback.
2005-09-26 Matthias Clasen <mclasen@redhat.com>
Fix#316871, reported by Dan Winship:
* gdk/gdkwindow.h (struct _GdkWindowObject): Add a shaped flag.
* gdk/x11/gdkwindow-x11.c (gdk_window_shape_combine_mask)
(gdk_window_shape_combine_region): Set it here.
* gdk/gdkwindow.c (gdk_window_invalidate_maybe_recurse): Don't
remove the child area for shaped windows.
2005-05-11 Owen Taylor <otaylor@redhat.com>
* gtk/gtkcolorbutton.c: Use a GtkAlignment rather than a GtkDrawingArea
to draw the swatch in to avoid having an extraneous window.
* gtk/gtkcolorsel.c (color_sample_draw_sample): Actually se tthe
color when !has_opacity.
2005-05-10 Owen Taylor <otaylor@redhat.com>
* gdk/gdkcairo.[ch] gdk/gdkcolor.[ch] gdk/Makefile.am: Add source
files for Cairo convenience functionality.
* gdk/gdkcairo.h (gdk_cairo_rectangle, gdk_cairo_region): Add a
convenience functions to add GdkRectangle, GdkRegion to a cairo path.
* gdk/gdkwindow.c gdk/gdkgc.c gtk/gtkcolorsel.c gtk/gtkiconview.c
gtk/gtkstyle.c: Use gdk_cairo_rectangle/region().
* gdk/gdkcairo.[ch] gdk/gdkdrawable.h gdk/gdkdraw.c: Rename
gdk_drawable_create_cairo_context() to gdk_cairo_create().
* gdk/gdkcairo.c gdk/gdkpixbuf.h gdk/gdkpixbuf-render.c:
Rename gdk_pixbuf_set_as_cairo_source() to
gdk_cairo_set_source_pixbuf().
* gdk/gdkdraw.c gdk/gdkpango.c gtk/gtkcolorsel.c gtk/gtkhruler.c
gtk/gtkhsv.c gtk/gtkiconview.c gtk/gtkstyle.c gtk/gtkvruler.c:
Adjust for renames.
* gdk/gdk.symbols: Update.
* gtk/gtkwidget.c (gtk_widget_queue_shallow_draw): Fix
coordinate system problem that was causing the wrong portions
to be invalidated.
* gtk/gtkcellrenderer.c (gtk_cell_renderer_render)
gtk/gtkcellrendererpixbuf.c (gtk_cell_renderer_pixbuf_render)
gtk/gtkcellrendererprogress.c (gtk_cell_renderer_progress_render)
gtk/gtkcellrenderertext.c (gtk_cell_renderer_text_render)
gtk/gtkcellview.c (gtk_cell_view_expose)
gtk/gtkdnd.c (gtk_drag_highlight_expose)
gtk/gtkentry.c (gtk_entry_draw_text)
gtk/gtktextview.c (text_window_invalidate_rect): Some cairoization.
* gtk/gtkcalendar.[ch]: Beat into something roughly resembling
GTK+ style ... use instance-private data and standard names for
private structure, etc. Move function docs inline.
* gtk/gtkcalendar.[ch]: Switch to drawing everything in
expose. Switch drawing to Cairo.
* gtk/gtkcalendar.c (gtk_calendar_freeze): Deprecate
gtk_calendar_freeze/thaw
2005-04-28 Owen Taylor <otaylor@redhat.com>
* gtk/gtkwidget.c: Add a draw-border style property to allow
themes to draw outside the widget's allocation.
* gdk/gdkwindow.c gtk/gtkstyle.c: Remove some save/restore pairs
that were working around the clip-leakage bug in Cairo.
* gtk/gtkstyle.c: Use cairo_fill_preserve() rathe than
save/fill/restore.
* gdk/gdkgc.c gdk/gdkinternals.h: Add _gdk_gc_update_context()
That updates a Cairo context to match a GC.
* gdk/gdkdraw.c: Use _gdk_gc_update_context() to add support
for tiles/stipples/clipping to gdk_draw_glyphs(),
gdk_draw_trapezoids().
* gdk/gdkpango.c: Use _gdk_gc_update_context() instead of internal
implementation of stipples. Use one cairo_t across the entire
drawing operation. Replace cairo_matrix_create() with
stack-allocated matrices.
* gdk/gdkgc.c gdk/gdkinternals.h gdk/x11/gdkgc-x11.c
gdk/win32/gdkgc-win32.c: Save various aspects of the
GC state (fill, tile, stipple, foreground, background, clip region)
in instance-private-data for future use. Add getters.
Get rid of _gdk_windowing_gc_get_foreground() function implemented
by the backends.
* gdk/gdkgc.c gdk/gdkinternals.h gdk/x11/gdkgc-x11.c
gdk/win32/gdkgc-win32.c gdk/linux-fb/gdkgc-fb.c: Add
_gdk_gc_init() to do initial setup of the GC from values;
fixes some problems from drawable redirection.
* gdk/gdkgc.c gdk/gdkinternals.h gdk/x11/gdkgc-x11.c
gdk/win32/gdkgc-win32.c gdk/linux-fb/gdkgc-fb.c: Move
gdk_gc_copy() and gdk_gc_set_clip_{region,rectangle}() into
the generic code, add _gdk_windowing_gc_copy(),
_gdk_windowing_gc_set_clip_region() to do backend specific
stuff.
* gdk/x11/{gdkprivate-x11.h,gdkgc-x11.c.c,gdkdrawable-x11.c}
gdk/win32/{gdkprivate-win32.h,gdkgc-x11.c.c,gdkdrawable-x11.c}
gdk/linux-fb/{gdkprivate-fb.h,gdkgc-fb.c.c,gdkdrawable-fb.c}:
Don't duplicate state that now is stored by the generic code.
* gdk/gdk.symbols Update
2005-04-18 Owen Taylor <otaylor@redhat.com>
* gtk/gtkstyle.c gtk/gtkcolorsel.c gtk/gtkhsv.c gtk/gtkiconview.c
* gdk/gdkcolor.c gdk/gdkwindow.c gdk/gdkpixbuf-render.c
gdk/gdkpango.c tests/testcairo.c: Update to new Cairo API for
setting color and opacity. (#301066, Vincent Noel)
Mon Mar 28 15:13:42 2005 Søren Sandmann <sandmann@redhat.com>
* gdk/gdkwindow.c (gdk_window_invalidate_maybe_recurse): Don't
invalidate areas that are covered by mapped input-output child
windows. Bug 141380.
2005-02-24 Owen Taylor <otaylor@redhat.com>
* gdk/gdkwindow.c: Use cairo_set_device_offset().
* gdk/win32/gdkdrawable-win32.[ch] gdk/win32/gdkwindow-win32.c
gdk/win32/gdkpixmap-win32.c:
Add_gdk_win32_drawable_acquire/release_dc() to get a DC for the
drawable. Add _gdk_drawable_win32_finish() to clean up resources
when a drawable is destroyed.
* gdk/win32/gdkgc-win32.c gdk/win32/gdkdrawable-win32.c
(blit_from_pixmap) gdk/win32/gdkprivate-win32.h : Use
acquire/release_dc when getting a DC to use with a GC or for
blitting from a pixmap.
* gdk/win32/gdkdrawable-win32.[ch]: Implement ref_cairo_surface()
* gdk/win32/gdkpango-win32.c gdk/win32/gdkdrawable-win32.c Makefile.am:
Remove gdk_screen_get_pango_context(), draw_glyph[_transformed]
implementations.
* gdk/win32/gdkdrawable-win32.c: Remove
gdk_draw_rectangle_alpha_libgtk_only()
2005-03-15 Owen Taylor <otaylor@redhat.com>
* gdk/gdkdrawable.h gdk/gdkdraw.c gdk/gdkpixmap.c gdk/gdkwindow.c
gdk/x11/gdkdrawable-x11.c gdk/x11/gdkpixmap-x11.c gdk/x11/gdkwindow-x11.c
gdk/gdkinternals.h: Switch set_cairo_target() virtual function to
ref_cairo_surface()
* gdk/gdkdrawable.h gdk/gdkdraw.h: Switch set_cairo_target() virtual
function to create_cairo_context()
* gdk/gdkwindow.c: Clear double buffer pixmaps with Cairo.
* gdk/x11/gdkwindow-x11.c: Keep all components in GdkWindowObject.bg_color,
not just the pixel.
* tests/testcairo.c: Update for create_cairo_context()
* gdk/gdkdraw.c (gdk_draw_trapezoids, gdk_draw_glyphs[_transformed]):
Reimplement in terms of Cairo, bypass the vtable entries.
* gdk/x11/gdkdrawable-x11.[ch] gdk/x11/gdkdisplay-x11.[ch]
gdk/x11/gdkgc-x11.c gdk/x11/gdkpango-x11.c
gdk/x11/gdkprivate-x11.h gdk/x11/Makefile.am: Remove
implementation of draw_trapezoids / draw_glyphs[_transformed].
* gdk/gdkpango.c: Switch GdkPangoRenderer to use Cairo
* gdk/gdkpango.c gdk/x11/gdkpango-x11.c: Move
gdk_pango_context_get_for_screen() into the backend independent code.
* gdk/x11/gdkdrawable-x11.[ch]: Remove Xft use, use RENDER directly
for drawing images.
* gdk/gdkdrawable.h gdk/x11/gdkdrawable-x11.c: Remove
gdk_draw_rectangle_alpha_libgtk_only.
* gdk/gdkpixbuf.h gdk/gdkpixbuf-render.c: Add
gdk_pixbuf_set_as_cairo_source()
* gdk/gdk.symbols: Update
* gtk/gtkcolorsel.c gtk/gtkhsv.c gtk/gtkiconview.c gtk/gtkruler.[ch]
gtk/gtk[hv]ruler.c: Convert to Cairo rendering.
* gtk/gtkstyle.c (gtk_default_draw_check, gtk_default_draw_focus,
gtk_default_draw_option): Switch to Cairo. Simplify the checkbutton,
radio button style for now to get something more scalable.
* gtk/gtksettings.c: #if 0 out the code to use PangoXft for hinting/
antialiasing/dpi settings.
2005-03-15 Matthias Clasen <mclasen@redhat.com>
Make PLT-reduction work with gcc4, and don't include
everything in gdkalias.h:
* gdk/gdk.symbols: Group symbols by header and source file.
* gdk/makegdkalias.pl: Protect definitions by the same
preprocessor symbols used to guard the headers. Move
the alias declarations to a separate file which is
produced when calling makegdkalias.pl -def
* gdk/Makefile.am (gdkaliasdef.c): Add a rule to generate this
file.
* gdk/*.c, gdk/x11/*.c: Include gdkalias.h after the other
headers, include gdkaliasdef.c at the bottom.
2005-02-03 Owen Taylor <otaylor@redhat.com>
* gdk/gdkdrawable.[ch] gdkpixmap.c gdkwindow.c: Add
gdk_drawable_set_cairo_target().
* tests/testtreeflow.c (enum): Use grand not rand as a variable
name because one of the cairo headers is pulling in stdlib.h.
* tests/testcairo.c tests/Makefile.am: Add a simple cairo based
example.
* configure.in: Bump release to 2.7.0, gtk_binary_version to 2.7.0.
* Require libpangocairo for all backends.
Wed Dec 22 14:22:19 2004 Søren Sandmann <sandmann@redhat.com>
* tests/testtoolbar.c (timeout_cb): Add sensitivity-changing
timeout. Written by Christian Persch.
Wed Dec 22 14:14:02 2004 Søren Sandmann <sandmann@redhat.com>
Bug #161561
* gdk/x11/gdkwindow-x11.c (tmp_{re,un}set_bg): Only set/reset the
background for windows that get expose events.
* gdk/gdkwindow.c (gdk_window_process_updates_internal): Remove
hack to repaint !expose windows.
Sat Nov 20 15:13:51 2004 Owen Taylor <otaylor@redhat.com>
* gdk/gdkpango.[ch]: Add GdkPangoRenderer, a subclass of
PangoRenderer targeting GDK drawables. Use to implement the old
gdk_draw_layout() and friends.
* gdk/gdkdraw.c gdk/gdkdrawable.h gdk/gdkwindow.c gdk/gdkpixmap.c:
Add gdk_draw_glyphs_transformed() gdk_draw_trapezoids() and
the corresponding members of GdkDrawableClass. Add a fallback
implementation of gdk_draw_trapezoids() in terms of pixbufs.
* gdk/gdkwindowing.h gdk/x11/gdkg-x11.h: Add
_gdk_windowing_gc_get_foreground() to enable the fallback
trapezoid implementation.
* gdk/x11/gdkdrawable-x11.c gdk/x11/gdkdisplay-x11.h: Implement
draw_glyph_transformed, draw_trapezoids.
* gdk/x11/gdkdrawable-x11.[ch]: Add
_gdk_x11_drawable_draw_xtrapezoids, _gdk_x11_drawable_draw_xft_glyphs
for use of GdkX11Renderer.
* gdk/x11/gdkgc-x11.c gdk/x11/gdkprivate-x11.h: Implement
GDK_TILED, GDK_STIPPLED, GDK_OPAQUE_STIPPLED in the RENDER codepath.
* gdk/gdkpango-x11.c: Add GdkX11Renderer... a subclass of
PangoXftRenderer that does tiles/stipples and fallback rendering
of trapezoids without the RENDER extension.
* gdk/gdkpango-x11.c gdk/x11/gdkscreen-x11.[ch] _gdk_x11_renderer_get:
Add _gdk_x11_renderer_get() to get a singleton GdkX11Renderer
for the screen.
* gdk/x11/gdkdrawable-x11.c (get_impl_drawable): Fix a None/NULL
confusion.
* gtk/gtklabel.[ch] gtk/gtk.symbols: Add gtk_label_set/get_angle(),
and an ::angle property.
* gtk/gtklabel.c: Remove #if 0'd dead code gtk_label_paint_word().
* gtk/gtktextdisplay.c: Switch to using a GtkTextRenderer subclass
of GdkPangoRenderer for drawing.
* gtk/gtktextlayout.[ch] gtk/gtktextdisplay.c: Switch to using
gtk_attr_shape_new_with_data() to store backreferences to
embedded pixmaps and widgets. Leave line_display->shaped_objects
around for backwords compatibility.
* gdk/gdkpango.[ch] (gdk_pango_context_set_colormap): Describe
as deprecated, remove implementation.
* gtk/gtkwidget.c (gtk_widget_create_pango_context): Remove
call to gdk_pango_context_set_colormap.
* demos/gtk-demo/Makefile.am demos/gtk-demo/rotated_text.c: Add
a demo showing drawing rotated text.
* tests/testgtk.c: Add a rotated-label test, and also a rotated
drawing test (differs from demos/gtk-demo/rotated_text by also
using a tile)
Wed Oct 6 00:45:04 2004 <timj@birnet.org>
* gdk/gdkwindow.c (gdk_window_is_viewable): check the iteration window
variable, not just the window passed in. fixes#145270.
2004-08-26 Matthias Clasen <mclasen@redhat.com>
Make gdk_window_process_[all]_updates() respect
update_freeze_counter (#144272, Soeren Sandmann)
* gdk/gdkwindow.c (gdk_window_schedule_update): New function to
install an idle for gdk_window_update_idle() if one isn't there
already.
(gdk_window_process_all_updates):
(gdk_window_process_updates): Only process the updates if the
window isn't frozen.
(gdk_window_invalidate_maybe_recurse): Schedule an update when
necessary.
(gdk_window_thaw_updates): Use gdk_window_schedule_update() instead
of directly installing the idle.
Mon Aug 9 15:41:17 2004 Matthias Clasen <maclas@gmx.de>
Add hidden aliases for exported symbols which are
used internally in order to get rid of many PLT
entries. (#145519, Arjan van de Ven)
* gdk/Makefile.am: Add rules to generate gdk.def and
gdkalias.h from gdk.symbols, and make make check check
the abi with abicheck.sh.
* gdk/gdk.symbols: New file. Definition of the GDK ABI.
The file can be processed by cpp to filter out certain
subsets of symbols.
* gdk/abicheck.sh: New file. Script to check the actually
symbols exported from libgdk-x11.2.0.so against the symbols
found in gdk.symbols.
* gdk/makegdkalias.pl: New file. Perl script to generate the
header containing the alias definitions for internally used
exported symbols from a list of symbols.
* gdk/*.c, gdk/x11/*.c: Include gdkalias.h
Tue Jul 13 00:40:29 2004 Soeren Sandmann <sandmann@daimi.au.dk>
* gdk/gdkwindow.c (gdk_window_process_updates_internal): Do an
empty begin_paint_region()/end_paint() for windows without
EXPOSURE_MASK.
* gdk/x11/gdkwindow-x11.c (_gdk_x11_window_tmp_unset_bg,
_gdk_x11_window_tmp_reset_bg): Remove checks for EXPOSURE_MASK.
Sat Mar 13 12:17:16 2004 Owen Taylor <otaylor@redhat.com>
* gdk/x11/gdkwindow-x11.c (gdk_window_reparent): Make
this a total no-op when the new or old parent is
destroyed. (#134230, patch from Soeren Sandmann)
* gdk/gdkwindow.c (_gdk_window_destroy_hierarchy):
For foreign windows in our heirarchy, call
_gdk_windowing_window_destroy_foreign (window) and skip
all the normal destruction logic.
* gdk/x11/gdkwindow-x11.c gdk/win32/gdkwindow-win32.c:
Move code to request destruction of a foreign window
code into a separate _gdk_windowing_window_destroy_foreign().
* gdk/x11/gdkwindow-x11.c (gdk_window_impl_x11_finalize):
Call GDK_WINDOW_DISPLAY() on the wrapper not on the
impl. (Also from Soeren's patch)
2004-03-05 Federico Mena Quintero <federico@ximian.com>
Fixes#136082 and #135265, patch by Morten Welinder.
* configure.in: Use AC_SYS_LARGEFILE.
* */*.c: #include <config.h>
Wed Feb 18 17:53:27 2004 Soeren Sandmann <sandmann@daimi.au.dk>
* gdk/gdkwindow.c (gdk_window_get_bg_gc): Use a scratch GC in the
case where the background is a solid color.
(gdk_window_clear_backing_rect): Reset the clip region after use.
* gdk/gdkpixbuf-render.c (gdk_pixbuf_render_threshold_alpha): Go
back to using a scratch GC. Pointed out by Owen Taylor
* gdk/gdkdraw.c (gdk_drawable_real_draw_pixbuf): Only use a
scratch GC if the passed-in one is NULL
Wed Feb 18 14:27:08 2004 Soeren Sandmann <sandmann@daimi.au.dk>
* gdk/gdkwindow.c (gdk_window_get_composite_drawable): Reset clip
region back to NULL on cached GC (rest of #134728)
Wed Feb 18 13:28:57 2004 Soeren Sandmann <sandmann@daimi.au.dk>
Fix bug reported by Nam SungHyun.
* gdk/gdkpixbuf-render.c (gdk_pixbuf_render_threshold_alpha):
Don't use a cached GC here since the function needs to modify the
foreground color.
* gdk/gdkwindow.c (gdk_window_end_paint): Reset clip region back
to NULL on the cached GC.
Wed Feb 18 01:44:59 2004 Soeren Sandmann <sandmann@daimi.au.dk>
GC caching, bug #125645 (based on patch by Brian Cameron)
* gdk/gdkscreen.h (struct _GdkScreen): Add GC cache
* gdk/gdkscreen.c (gdk_screen_dispose): New function. Unref the
cached GC's here.
* gdk/gdkdraw.c (_gdk_drawable_get_scratch_gc): New function to
get a scratch gc.
* gdk/gdkinternals.h: Declare the function here
* gdk/gdkdraw.c (gdk_drawable_real_draw_pixbuf): Use
_gdk_drawable_get_scratch_gc() instead of creating a new GC.
* gdk/x11/gdkgeometry-x11.c (gdk_window_copy_area_scroll): same
* gdk/x11/gdkdrawable-x11.c (draw_with_images): same
* gdk/gdkwindow.c (gdk_window_get_composite_drawable): same
* gdk/gdkwindow.c (gdk_window_end_paint): same
* gdk/gdkpixmap.c (gdk_pixmap_colormap_new_from_pixbuf): same
* gdk/gdkpixbuf-render.c (gdk_pixbuf_render_threshold_alpha): same
* gdk/gdkpixbuf-render.c (gdk_pixbuf_render_pixmap_and_mask_for_colormap): same
