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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpcanvaspassepartout.c
* Copyright (C) 2010 Sven Neumann <sven@gimp.org>
*
* 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 "display-types.h"
#include "gimpcanvas-style.h"
#include "gimpcanvasitem-utils.h"
#include "gimpcanvaspassepartout.h"
#include "gimpdisplayshell.h"
#include "gimpdisplayshell-scale.h"
enum
{
PROP_0,
PROP_OPACITY,
};
typedef struct _GimpCanvasPassePartoutPrivate GimpCanvasPassePartoutPrivate;
struct _GimpCanvasPassePartoutPrivate
{
gdouble opacity;
};
#define GET_PRIVATE(item) \
((GimpCanvasPassePartoutPrivate *) gimp_canvas_passe_partout_get_instance_private ((GimpCanvasPassePartout *) (item)))
/* local function prototypes */
static void gimp_canvas_passe_partout_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_canvas_passe_partout_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_canvas_passe_partout_draw (GimpCanvasItem *item,
cairo_t *cr);
static cairo_region_t * gimp_canvas_passe_partout_get_extents (GimpCanvasItem *item);
static void gimp_canvas_passe_partout_fill (GimpCanvasItem *item,
cairo_t *cr);
G_DEFINE_TYPE_WITH_PRIVATE (GimpCanvasPassePartout, gimp_canvas_passe_partout,
GIMP_TYPE_CANVAS_RECTANGLE)
#define parent_class gimp_canvas_passe_partout_parent_class
static void
gimp_canvas_passe_partout_class_init (GimpCanvasPassePartoutClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpCanvasItemClass *item_class = GIMP_CANVAS_ITEM_CLASS (klass);
object_class->set_property = gimp_canvas_passe_partout_set_property;
object_class->get_property = gimp_canvas_passe_partout_get_property;
item_class->draw = gimp_canvas_passe_partout_draw;
item_class->get_extents = gimp_canvas_passe_partout_get_extents;
item_class->fill = gimp_canvas_passe_partout_fill;
g_object_class_install_property (object_class, PROP_OPACITY,
g_param_spec_double ("opacity", NULL, NULL,
0.0,
1.0, 0.5,
GIMP_PARAM_READWRITE));
}
static void
gimp_canvas_passe_partout_init (GimpCanvasPassePartout *passe_partout)
{
}
static void
gimp_canvas_passe_partout_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpCanvasPassePartoutPrivate *priv = GET_PRIVATE (object);
switch (property_id)
{
case PROP_OPACITY:
priv->opacity = g_value_get_double (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_canvas_passe_partout_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpCanvasPassePartoutPrivate *priv = GET_PRIVATE (object);
switch (property_id)
{
case PROP_OPACITY:
g_value_set_double (value, priv->opacity);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_canvas_passe_partout_draw (GimpCanvasItem *item,
cairo_t *cr)
{
GimpDisplayShell *shell = gimp_canvas_item_get_shell (item);
gint x, y;
gint w, h;
if (! gimp_display_shell_get_infinite_canvas (shell))
{
x = -shell->offset_x;
y = -shell->offset_y;
gimp_display_shell_scale_get_image_size (shell, &w, &h);
}
else
{
gimp_canvas_item_untransform_viewport (item, &x, &y, &w, &h);
}
cairo_rectangle (cr, x, y, w, h);
GIMP_CANVAS_ITEM_CLASS (parent_class)->draw (item, cr);
}
static cairo_region_t *
gimp_canvas_passe_partout_get_extents (GimpCanvasItem *item)
{
GimpDisplayShell *shell = gimp_canvas_item_get_shell (item);
cairo_rectangle_int_t rectangle;
if (! gimp_display_shell_get_infinite_canvas (shell))
{
cairo_region_t *inner;
cairo_region_t *outer;
rectangle.x = - shell->offset_x;
rectangle.y = - shell->offset_y;
gimp_display_shell_scale_get_image_size (shell,
&rectangle.width,
&rectangle.height);
outer = cairo_region_create_rectangle (&rectangle);
inner = GIMP_CANVAS_ITEM_CLASS (parent_class)->get_extents (item);
cairo_region_xor (outer, inner);
cairo_region_destroy (inner);
return outer;
}
else
{
gimp_canvas_item_untransform_viewport (item,
&rectangle.x,
&rectangle.y,
&rectangle.width,
&rectangle.height);
return cairo_region_create_rectangle (&rectangle);
}
}
static void
gimp_canvas_passe_partout_fill (GimpCanvasItem *item,
cairo_t *cr)
{
GimpCanvasPassePartoutPrivate *priv = GET_PRIVATE (item);
cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);
cairo_clip (cr);
gimp_canvas_set_passe_partout_style (gimp_canvas_item_get_canvas (item), cr);
cairo_paint_with_alpha (cr, priv->opacity);
}
GimpCanvasItem *
gimp_canvas_passe_partout_new (GimpDisplayShell *shell,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
g_return_val_if_fail (GIMP_IS_DISPLAY_SHELL (shell), NULL);
return g_object_new (GIMP_TYPE_CANVAS_PASSE_PARTOUT,
"shell", shell,
"x", x,
"y", y,
"width", width,
"height", height,
"filled", TRUE,
NULL);
}
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