diff options
Diffstat (limited to 'app/display/gimpcanvaspassepartout.c')
| -rw-r--r-- | app/display/gimpcanvaspassepartout.c | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/app/display/gimpcanvaspassepartout.c b/app/display/gimpcanvaspassepartout.c new file mode 100644 index 0000000..21e7307 --- /dev/null +++ b/app/display/gimpcanvaspassepartout.c @@ -0,0 +1,235 @@ +/* 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); +} |