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-rw-r--r--app/display/gimpcanvaspassepartout.c235
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diff --git a/app/display/gimpcanvaspassepartout.c b/app/display/gimpcanvaspassepartout.c
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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);
+}