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Gimp/app/display/gimpdisplay.c
Jehan d493f0537f Issue #8900 and #9923: reimplementing GimpUnit as a proper class. 
This fixes all our GObject Introspection issues with GimpUnit which was
both an enum and an int-derived type of user-defined units *completing*
the enum values. GIR clearly didn't like this!

Now GimpUnit is a proper class and units are unique objects, allowing to
compare them with an identity test (i.e. `unit == gimp_unit_pixel ()`
tells us if unit is the pixel unit or not), which makes it easy to use,
just like with int, yet adding also methods, making for nicer
introspected API.

As an aside, this also fixes #10738, by having all the built-in units
retrievable even if libgimpbase had not been properly initialized with
gimp_base_init().
I haven't checked in details how GIR works to introspect, but it looks
like it loads the library to inspect and runs functions, hence
triggering some CRITICALS because virtual methods (supposed to be
initialized with gimp_base_init() run by libgimp) are not set. This new
code won't trigger any critical because the vtable method are now not
necessary, at least for all built-in units.

Note that GimpUnit is still in libgimpbase. It could have been moved to
libgimp in order to avoid any virtual method table (since we need to
keep core and libgimp side's units in sync, PDB is required), but too
many libgimpwidgets widgets were already using GimpUnit. And technically
most of GimpUnit logic doesn't require PDB (only the creation/sync
part). This is one of the reasons why user-created GimpUnit list is
handled and stored differently from other types of objects.

Globally this simplifies the code a lot too and we don't need separate
implementations of various utils for core and libgimp, which means less
prone to errors.
2024-08-02 10:46:38 +02:00

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl.h>
#include <gtk/gtk.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpmath/gimpmath.h"
#include "display-types.h"
#include "tools/tools-types.h"
#include "config/gimpguiconfig.h"
#include "core/gimp.h"
#include "core/gimpcontainer.h"
#include "core/gimpcontext.h"
#include "core/gimpimage.h"
#include "core/gimpprogress.h"
#include "widgets/gimpdialogfactory.h"
#include "tools/gimptool.h"
#include "tools/tool_manager.h"
#include "gimpdisplay.h"
#include "gimpdisplay-handlers.h"
#include "gimpdisplayshell.h"
#include "gimpdisplayshell-expose.h"
#include "gimpdisplayshell-handlers.h"
#include "gimpdisplayshell-render.h"
#include "gimpdisplayshell-scroll.h"
#include "gimpdisplayshell-scrollbars.h"
#include "gimpdisplayshell-title.h"
#include "gimpdisplayshell-transform.h"
#include "gimpimagewindow.h"
#include "gimp-intl.h"
#define PAINT_AREA_CHUNK_WIDTH 32
#define PAINT_AREA_CHUNK_HEIGHT 32
enum
{
PROP_0,
PROP_IMAGE,
PROP_SHELL
};
struct _GimpDisplayImplPrivate
{
GimpImage *image; /* pointer to the associated image */
gint instance; /* the instance # of this display as
* taken from the image at creation */
GeglRectangle bounding_box;
GtkWidget *shell;
cairo_region_t *update_region;
};
/* local function prototypes */
static void gimp_display_progress_iface_init (GimpProgressInterface *iface);
static void gimp_display_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_display_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static gboolean gimp_display_impl_present (GimpDisplay *display);
static gboolean gimp_display_impl_grab_focus (GimpDisplay *display);
static GimpProgress * gimp_display_progress_start (GimpProgress *progress,
gboolean cancellable,
const gchar *message);
static void gimp_display_progress_end (GimpProgress *progress);
static gboolean gimp_display_progress_is_active (GimpProgress *progress);
static void gimp_display_progress_set_text (GimpProgress *progress,
const gchar *message);
static void gimp_display_progress_set_value (GimpProgress *progress,
gdouble percentage);
static gdouble gimp_display_progress_get_value (GimpProgress *progress);
static void gimp_display_progress_pulse (GimpProgress *progress);
static GBytes * gimp_display_progress_get_window_id (GimpProgress *progress);
static gboolean gimp_display_progress_message (GimpProgress *progress,
Gimp *gimp,
GimpMessageSeverity severity,
const gchar *domain,
const gchar *message);
static void gimp_display_progress_canceled (GimpProgress *progress,
GimpDisplay *display);
static void gimp_display_flush_update_region (GimpDisplay *display);
static void gimp_display_paint_area (GimpDisplay *display,
gint x,
gint y,
gint w,
gint h);
G_DEFINE_TYPE_WITH_CODE (GimpDisplayImpl, gimp_display_impl, GIMP_TYPE_DISPLAY,
G_ADD_PRIVATE (GimpDisplayImpl)
G_IMPLEMENT_INTERFACE (GIMP_TYPE_PROGRESS,
gimp_display_progress_iface_init))
#define parent_class gimp_display_impl_parent_class
static void
gimp_display_impl_class_init (GimpDisplayImplClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpDisplayClass *display_class = GIMP_DISPLAY_CLASS (klass);
object_class->set_property = gimp_display_set_property;
object_class->get_property = gimp_display_get_property;
display_class->present = gimp_display_impl_present;
display_class->grab_focus = gimp_display_impl_grab_focus;
g_object_class_install_property (object_class, PROP_IMAGE,
g_param_spec_object ("image",
NULL, NULL,
GIMP_TYPE_IMAGE,
GIMP_PARAM_READABLE));
g_object_class_install_property (object_class, PROP_SHELL,
g_param_spec_object ("shell",
NULL, NULL,
GIMP_TYPE_DISPLAY_SHELL,
GIMP_PARAM_READABLE));
}
static void
gimp_display_impl_init (GimpDisplayImpl *display)
{
display->priv = gimp_display_impl_get_instance_private (display);
}
static void
gimp_display_progress_iface_init (GimpProgressInterface *iface)
{
iface->start = gimp_display_progress_start;
iface->end = gimp_display_progress_end;
iface->is_active = gimp_display_progress_is_active;
iface->set_text = gimp_display_progress_set_text;
iface->set_value = gimp_display_progress_set_value;
iface->get_value = gimp_display_progress_get_value;
iface->pulse = gimp_display_progress_pulse;
iface->get_window_id = gimp_display_progress_get_window_id;
iface->message = gimp_display_progress_message;
}
static void
gimp_display_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
switch (property_id)
{
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_display_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpDisplayImpl *display = GIMP_DISPLAY_IMPL (object);
switch (property_id)
{
case PROP_IMAGE:
g_value_set_object (value, display->priv->image);
break;
case PROP_SHELL:
g_value_set_object (value, display->priv->shell);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static gboolean
gimp_display_impl_present (GimpDisplay *display)
{
gimp_display_shell_present (gimp_display_get_shell (display));
return TRUE;
}
static gboolean
gimp_display_impl_grab_focus (GimpDisplay *display)
{
GimpDisplayImpl *display_impl = GIMP_DISPLAY_IMPL (display);
if (display_impl->priv->shell && gimp_display_get_image (display))
{
GimpImageWindow *image_window;
image_window = gimp_display_shell_get_window (gimp_display_get_shell (display));
gimp_display_present (display);
gtk_widget_grab_focus (gimp_window_get_primary_focus_widget (GIMP_WINDOW (image_window)));
return TRUE;
}
return FALSE;
}
static GimpProgress *
gimp_display_progress_start (GimpProgress *progress,
gboolean cancellable,
const gchar *message)
{
GimpDisplayImpl *display = GIMP_DISPLAY_IMPL (progress);
if (display->priv->shell)
return gimp_progress_start (GIMP_PROGRESS (display->priv->shell),
cancellable,
"%s", message);
return NULL;
}
static void
gimp_display_progress_end (GimpProgress *progress)
{
GimpDisplayImpl *display = GIMP_DISPLAY_IMPL (progress);
if (display->priv->shell)
gimp_progress_end (GIMP_PROGRESS (display->priv->shell));
}
static gboolean
gimp_display_progress_is_active (GimpProgress *progress)
{
GimpDisplayImpl *display = GIMP_DISPLAY_IMPL (progress);
if (display->priv->shell)
return gimp_progress_is_active (GIMP_PROGRESS (display->priv->shell));
return FALSE;
}
static void
gimp_display_progress_set_text (GimpProgress *progress,
const gchar *message)
{
GimpDisplayImpl *display = GIMP_DISPLAY_IMPL (progress);
if (display->priv->shell)
gimp_progress_set_text_literal (GIMP_PROGRESS (display->priv->shell),
message);
}
static void
gimp_display_progress_set_value (GimpProgress *progress,
gdouble percentage)
{
GimpDisplayImpl *display = GIMP_DISPLAY_IMPL (progress);
if (display->priv->shell)
gimp_progress_set_value (GIMP_PROGRESS (display->priv->shell),
percentage);
}
static gdouble
gimp_display_progress_get_value (GimpProgress *progress)
{
GimpDisplayImpl *display = GIMP_DISPLAY_IMPL (progress);
if (display->priv->shell)
return gimp_progress_get_value (GIMP_PROGRESS (display->priv->shell));
return 0.0;
}
static void
gimp_display_progress_pulse (GimpProgress *progress)
{
GimpDisplayImpl *display = GIMP_DISPLAY_IMPL (progress);
if (display->priv->shell)
gimp_progress_pulse (GIMP_PROGRESS (display->priv->shell));
}
static GBytes *
gimp_display_progress_get_window_id (GimpProgress *progress)
{
GimpDisplayImpl *display = GIMP_DISPLAY_IMPL (progress);
if (display->priv->shell)
return gimp_progress_get_window_id (GIMP_PROGRESS (display->priv->shell));
return NULL;
}
static gboolean
gimp_display_progress_message (GimpProgress *progress,
Gimp *gimp,
GimpMessageSeverity severity,
const gchar *domain,
const gchar *message)
{
GimpDisplayImpl *display = GIMP_DISPLAY_IMPL (progress);
if (display->priv->shell)
return gimp_progress_message (GIMP_PROGRESS (display->priv->shell), gimp,
severity, domain, message);
return FALSE;
}
static void
gimp_display_progress_canceled (GimpProgress *progress,
GimpDisplay *display)
{
gimp_progress_cancel (GIMP_PROGRESS (display));
}
/* public functions */
GimpDisplay *
gimp_display_new (Gimp *gimp,
GimpImage *image,
GimpUnit *unit,
gdouble scale,
GimpUIManager *popup_manager,
GimpDialogFactory *dialog_factory,
GdkMonitor *monitor)
{
GimpDisplay *display;
GimpDisplayImplPrivate *private;
GimpImageWindow *window = NULL;
GimpDisplayShell *shell;
g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
g_return_val_if_fail (image == NULL || GIMP_IS_IMAGE (image), NULL);
g_return_val_if_fail (GDK_IS_MONITOR (monitor), NULL);
/* If there isn't an interface, never create a display */
if (gimp->no_interface)
return NULL;
display = g_object_new (GIMP_TYPE_DISPLAY_IMPL,
"gimp", gimp,
NULL);
private = GIMP_DISPLAY_IMPL (display)->priv;
/* refs the image */
if (image)
gimp_display_set_image (display, image);
/* get an image window */
if (GIMP_GUI_CONFIG (display->config)->single_window_mode)
{
GimpDisplay *active_display;
active_display = gimp_context_get_display (gimp_get_user_context (gimp));
if (! active_display)
{
active_display =
GIMP_DISPLAY (gimp_container_get_first_child (gimp->displays));
}
if (active_display)
{
GimpDisplayShell *shell = gimp_display_get_shell (active_display);
window = gimp_display_shell_get_window (shell);
}
}
if (! window)
{
window = gimp_image_window_new (gimp,
private->image,
dialog_factory,
monitor);
}
/* create the shell for the image */
private->shell = gimp_display_shell_new (display, unit, scale,
popup_manager,
monitor);
shell = gimp_display_get_shell (display);
gimp_display_update_bounding_box (display);
gimp_image_window_add_shell (window, shell);
gimp_display_shell_present (shell);
/* make sure the docks are visible, in case all other image windows
* are iconified, see bug #686544.
*/
gimp_dialog_factory_show_with_display (dialog_factory);
g_signal_connect (gimp_display_shell_get_statusbar (shell), "cancel",
G_CALLBACK (gimp_display_progress_canceled),
display);
/* add the display to the list */
gimp_container_add (gimp->displays, GIMP_OBJECT (display));
return display;
}
/**
* gimp_display_delete:
* @display:
*
* Closes the display and removes it from the display list. You should
* not call this function directly, use gimp_display_close() instead.
*/
void
gimp_display_delete (GimpDisplay *display)
{
GimpDisplayImplPrivate *private;
GimpTool *active_tool;
g_return_if_fail (GIMP_IS_DISPLAY (display));
private = GIMP_DISPLAY_IMPL (display)->priv;
/* remove the display from the list */
gimp_container_remove (display->gimp->displays, GIMP_OBJECT (display));
/* unrefs the image */
gimp_display_set_image (display, NULL);
active_tool = tool_manager_get_active (display->gimp);
if (active_tool && active_tool->focus_display == display)
tool_manager_focus_display_active (display->gimp, NULL);
if (private->shell)
{
GimpDisplayShell *shell = gimp_display_get_shell (display);
GimpImageWindow *window = gimp_display_shell_get_window (shell);
/* set private->shell to NULL *before* destroying the shell.
* all callbacks in gimpdisplayshell-callbacks.c will check
* this pointer and do nothing if the shell is in destruction.
*/
private->shell = NULL;
if (window)
{
if (gimp_image_window_get_n_shells (window) > 1)
{
g_object_ref (shell);
gimp_image_window_remove_shell (window, shell);
gtk_widget_destroy (GTK_WIDGET (shell));
g_object_unref (shell);
}
else
{
gimp_image_window_destroy (window);
}
}
else
{
g_object_unref (shell);
}
}
g_object_unref (display);
}
/**
* gimp_display_close:
* @display:
*
* Closes the display. If this is the last display, it will remain
* open, but without an image.
*/
void
gimp_display_close (GimpDisplay *display)
{
g_return_if_fail (GIMP_IS_DISPLAY (display));
if (gimp_container_get_n_children (display->gimp->displays) > 1)
{
gimp_display_delete (display);
}
else
{
gimp_display_empty (display);
}
}
/**
* gimp_display_get_action_name:
* @display:
*
* Returns: The action name for the given display. The action name
* depends on the display ID. The result must be freed with g_free().
**/
gchar *
gimp_display_get_action_name (GimpDisplay *display)
{
g_return_val_if_fail (GIMP_IS_DISPLAY (display), NULL);
return g_strdup_printf ("windows-display-%04d",
gimp_display_get_id (display));
}
GimpImage *
gimp_display_get_image (GimpDisplay *display)
{
g_return_val_if_fail (GIMP_IS_DISPLAY (display), NULL);
return GIMP_DISPLAY_IMPL (display)->priv->image;
}
void
gimp_display_set_image (GimpDisplay *display,
GimpImage *image)
{
GimpDisplayImplPrivate *private;
GimpImage *old_image = NULL;
GimpDisplayShell *shell;
g_return_if_fail (GIMP_IS_DISPLAY (display));
g_return_if_fail (image == NULL || GIMP_IS_IMAGE (image));
private = GIMP_DISPLAY_IMPL (display)->priv;
shell = gimp_display_get_shell (display);
if (private->image)
{
/* stop any active tool */
tool_manager_control_active (display->gimp, GIMP_TOOL_ACTION_HALT,
display);
gimp_display_shell_disconnect (shell);
gimp_display_disconnect (display);
g_clear_pointer (&private->update_region, cairo_region_destroy);
gimp_image_dec_display_count (private->image);
/* set private->image before unrefing because there may be code
* that listens for image removals and then iterates the
* display list to find a valid display.
*/
old_image = private->image;
#if 0
g_print ("%s: image->ref_count before unrefing: %d\n",
G_STRFUNC, G_OBJECT (old_image)->ref_count);
#endif
}
private->image = image;
if (image)
{
#if 0
g_print ("%s: image->ref_count before refing: %d\n",
G_STRFUNC, G_OBJECT (image)->ref_count);
#endif
g_object_ref (image);
private->instance = gimp_image_get_instance_count (image);
gimp_image_inc_instance_count (image);
gimp_image_inc_display_count (image);
gimp_display_connect (display);
if (shell)
gimp_display_shell_connect (shell);
}
if (old_image)
g_object_unref (old_image);
gimp_display_update_bounding_box (display);
if (shell)
{
if (image)
{
gimp_display_shell_reconnect (shell);
}
else
{
gimp_display_shell_title_update (shell);
}
}
if (old_image != image)
g_object_notify (G_OBJECT (display), "image");
}
gint
gimp_display_get_instance (GimpDisplay *display)
{
g_return_val_if_fail (GIMP_IS_DISPLAY (display), 0);
return GIMP_DISPLAY_IMPL (display)->priv->instance;
}
GimpDisplayShell *
gimp_display_get_shell (GimpDisplay *display)
{
g_return_val_if_fail (GIMP_IS_DISPLAY (display), NULL);
return GIMP_DISPLAY_SHELL (GIMP_DISPLAY_IMPL (display)->priv->shell);
}
void
gimp_display_empty (GimpDisplay *display)
{
GimpDisplayImplPrivate *private;
GList *iter;
g_return_if_fail (GIMP_IS_DISPLAY (display));
private = GIMP_DISPLAY_IMPL (display)->priv;
g_return_if_fail (GIMP_IS_IMAGE (private->image));
for (iter = display->gimp->context_list; iter; iter = g_list_next (iter))
{
GimpContext *context = iter->data;
if (gimp_context_get_display (context) == display)
gimp_context_set_image (context, NULL);
}
gimp_display_set_image (display, NULL);
gimp_display_shell_empty (gimp_display_get_shell (display));
}
void
gimp_display_fill (GimpDisplay *display,
GimpImage *image,
GimpUnit *unit,
gdouble scale)
{
GimpDisplayImplPrivate *private;
g_return_if_fail (GIMP_IS_DISPLAY (display));
g_return_if_fail (GIMP_IS_IMAGE (image));
private = GIMP_DISPLAY_IMPL (display)->priv;
g_return_if_fail (private->image == NULL);
gimp_display_set_image (display, image);
gimp_display_shell_fill (gimp_display_get_shell (display),
image, unit, scale);
}
void
gimp_display_update_bounding_box (GimpDisplay *display)
{
GimpDisplayImplPrivate *private;
GimpDisplayShell *shell;
GeglRectangle bounding_box = {};
g_return_if_fail (GIMP_IS_DISPLAY (display));
private = GIMP_DISPLAY_IMPL (display)->priv;
shell = gimp_display_get_shell (display);
if (shell)
{
bounding_box = gimp_display_shell_get_bounding_box (shell);
if (! gegl_rectangle_equal (&bounding_box, &private->bounding_box))
{
GeglRectangle diff_rects[4];
gint n_diff_rects;
gint i;
n_diff_rects = gegl_rectangle_subtract (diff_rects,
&private->bounding_box,
&bounding_box);
for (i = 0; i < n_diff_rects; i++)
{
gimp_display_paint_area (display,
diff_rects[i].x, diff_rects[i].y,
diff_rects[i].width, diff_rects[i].height);
}
private->bounding_box = bounding_box;
gimp_display_shell_scroll_clamp_and_update (shell);
gimp_display_shell_scrollbars_update (shell);
}
}
else
{
private->bounding_box = bounding_box;
}
}
void
gimp_display_update_area (GimpDisplay *display,
gboolean now,
gint x,
gint y,
gint w,
gint h)
{
GimpDisplayImplPrivate *private;
g_return_if_fail (GIMP_IS_DISPLAY (display));
private = GIMP_DISPLAY_IMPL (display)->priv;
if (now)
{
gimp_display_paint_area (display, x, y, w, h);
}
else
{
cairo_rectangle_int_t rect;
gint image_width;
gint image_height;
image_width = gimp_image_get_width (private->image);
image_height = gimp_image_get_height (private->image);
rect.x = CLAMP (x, 0, image_width);
rect.y = CLAMP (y, 0, image_height);
rect.width = CLAMP (x + w, 0, image_width) - rect.x;
rect.height = CLAMP (y + h, 0, image_height) - rect.y;
if (private->update_region)
cairo_region_union_rectangle (private->update_region, &rect);
else
private->update_region = cairo_region_create_rectangle (&rect);
}
}
void
gimp_display_flush (GimpDisplay *display)
{
g_return_if_fail (GIMP_IS_DISPLAY (display));
/* FIXME: we can end up being called during shell construction if "show all"
* is enabled by default, in which case the shell's display pointer is still
* NULL
*/
if (gimp_display_get_shell (display))
{
gimp_display_flush_update_region (display);
gimp_display_shell_flush (gimp_display_get_shell (display));
}
}
void
gimp_display_flush_now (GimpDisplay *display)
{
g_return_if_fail (GIMP_IS_DISPLAY (display));
gimp_display_flush_update_region (display);
}
/* private functions */
static void
gimp_display_flush_update_region (GimpDisplay *display)
{
GimpDisplayImplPrivate *private = GIMP_DISPLAY_IMPL (display)->priv;
if (private->update_region)
{
gint n_rects = cairo_region_num_rectangles (private->update_region);
gint i;
for (i = 0; i < n_rects; i++)
{
cairo_rectangle_int_t rect;
cairo_region_get_rectangle (private->update_region,
i, &rect);
gimp_display_paint_area (display,
rect.x,
rect.y,
rect.width,
rect.height);
}
g_clear_pointer (&private->update_region, cairo_region_destroy);
}
}
static void
gimp_display_paint_area (GimpDisplay *display,
gint x,
gint y,
gint w,
gint h)
{
GimpDisplayImplPrivate *private = GIMP_DISPLAY_IMPL (display)->priv;
GimpDisplayShell *shell = gimp_display_get_shell (display);
GeglRectangle rect;
gint x1, y1, x2, y2;
gdouble x1_f, y1_f, x2_f, y2_f;
if (! gegl_rectangle_intersect (&rect,
&private->bounding_box,
GEGL_RECTANGLE (x, y, w, h)))
{
return;
}
/* display the area */
gimp_display_shell_transform_bounds (shell,
rect.x,
rect.y,
rect.x + rect.width,
rect.y + rect.height,
&x1_f, &y1_f, &x2_f, &y2_f);
/* make sure to expose a superset of the transformed sub-pixel expose
* area, not a subset. bug #126942. --mitch
*
* also accommodate for spill introduced by potential box filtering.
* (bug #474509). --simon
*/
x1 = floor (x1_f - 0.5);
y1 = floor (y1_f - 0.5);
x2 = ceil (x2_f + 0.5);
y2 = ceil (y2_f + 0.5);
/* align transformed area to a coarse grid, to simplify the
* invalidated area
*/
x1 = floor ((gdouble) x1 / PAINT_AREA_CHUNK_WIDTH) * PAINT_AREA_CHUNK_WIDTH;
y1 = floor ((gdouble) y1 / PAINT_AREA_CHUNK_HEIGHT) * PAINT_AREA_CHUNK_HEIGHT;
x2 = ceil ((gdouble) x2 / PAINT_AREA_CHUNK_WIDTH) * PAINT_AREA_CHUNK_WIDTH;
y2 = ceil ((gdouble) y2 / PAINT_AREA_CHUNK_HEIGHT) * PAINT_AREA_CHUNK_HEIGHT;
gimp_display_shell_expose_area (shell, x1, y1, x2 - x1, y2 - y1);
gimp_display_shell_render_invalidate_area (shell, x1, y1, x2 - x1, y2 - y1);
}
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