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-rw-r--r--app/display/gimpcanvaspen.c231
1 files changed, 231 insertions, 0 deletions
diff --git a/app/display/gimpcanvaspen.c b/app/display/gimpcanvaspen.c
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+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpcanvaspen.c
+ * Copyright (C) 2010 Michael Natterer <mitch@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 "libgimpbase/gimpbase.h"
+#include "libgimpcolor/gimpcolor.h"
+#include "libgimpmath/gimpmath.h"
+
+#include "display-types.h"
+
+#include "core/gimpcontext.h"
+#include "core/gimpparamspecs.h"
+
+#include "gimpcanvas-style.h"
+#include "gimpcanvaspen.h"
+#include "gimpdisplayshell.h"
+
+
+enum
+{
+ PROP_0,
+ PROP_COLOR,
+ PROP_WIDTH
+};
+
+
+typedef struct _GimpCanvasPenPrivate GimpCanvasPenPrivate;
+
+struct _GimpCanvasPenPrivate
+{
+ GimpRGB color;
+ gint width;
+};
+
+#define GET_PRIVATE(pen) \
+ ((GimpCanvasPenPrivate *) gimp_canvas_pen_get_instance_private ((GimpCanvasPen *) (pen)))
+
+
+/* local function prototypes */
+
+static void gimp_canvas_pen_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec);
+static void gimp_canvas_pen_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec);
+static cairo_region_t * gimp_canvas_pen_get_extents (GimpCanvasItem *item);
+static void gimp_canvas_pen_stroke (GimpCanvasItem *item,
+ cairo_t *cr);
+
+
+G_DEFINE_TYPE_WITH_PRIVATE (GimpCanvasPen, gimp_canvas_pen,
+ GIMP_TYPE_CANVAS_POLYGON)
+
+#define parent_class gimp_canvas_pen_parent_class
+
+
+static void
+gimp_canvas_pen_class_init (GimpCanvasPenClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ GimpCanvasItemClass *item_class = GIMP_CANVAS_ITEM_CLASS (klass);
+
+ object_class->set_property = gimp_canvas_pen_set_property;
+ object_class->get_property = gimp_canvas_pen_get_property;
+
+ item_class->get_extents = gimp_canvas_pen_get_extents;
+ item_class->stroke = gimp_canvas_pen_stroke;
+
+ g_object_class_install_property (object_class, PROP_COLOR,
+ gimp_param_spec_rgb ("color", NULL, NULL,
+ FALSE, NULL,
+ GIMP_PARAM_READWRITE));
+
+ g_object_class_install_property (object_class, PROP_WIDTH,
+ g_param_spec_int ("width", NULL, NULL,
+ 1, G_MAXINT, 1,
+ GIMP_PARAM_READWRITE));
+}
+
+static void
+gimp_canvas_pen_init (GimpCanvasPen *pen)
+{
+}
+
+static void
+gimp_canvas_pen_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ GimpCanvasPenPrivate *private = GET_PRIVATE (object);
+
+ switch (property_id)
+ {
+ case PROP_COLOR:
+ gimp_value_get_rgb (value, &private->color);
+ break;
+ case PROP_WIDTH:
+ private->width = g_value_get_int (value);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_canvas_pen_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GimpCanvasPenPrivate *private = GET_PRIVATE (object);
+
+ switch (property_id)
+ {
+ case PROP_COLOR:
+ gimp_value_set_rgb (value, &private->color);
+ break;
+ case PROP_WIDTH:
+ g_value_set_int (value, private->width);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static cairo_region_t *
+gimp_canvas_pen_get_extents (GimpCanvasItem *item)
+{
+ GimpCanvasPenPrivate *private = GET_PRIVATE (item);
+ cairo_region_t *region;
+
+ region = GIMP_CANVAS_ITEM_CLASS (parent_class)->get_extents (item);
+
+ if (region)
+ {
+ cairo_rectangle_int_t rectangle;
+
+ cairo_region_get_extents (region, &rectangle);
+
+ rectangle.x -= ceil (private->width / 2.0);
+ rectangle.y -= ceil (private->width / 2.0);
+ rectangle.width += private->width + 1;
+ rectangle.height += private->width + 1;
+
+ cairo_region_union_rectangle (region, &rectangle);
+ }
+
+ return region;
+}
+
+static void
+gimp_canvas_pen_stroke (GimpCanvasItem *item,
+ cairo_t *cr)
+{
+ GimpCanvasPenPrivate *private = GET_PRIVATE (item);
+
+ gimp_canvas_set_pen_style (gimp_canvas_item_get_canvas (item), cr,
+ &private->color, private->width);
+ cairo_stroke (cr);
+}
+
+GimpCanvasItem *
+gimp_canvas_pen_new (GimpDisplayShell *shell,
+ const GimpVector2 *points,
+ gint n_points,
+ GimpContext *context,
+ GimpActiveColor color,
+ gint width)
+{
+ GimpCanvasItem *item;
+ GimpArray *array;
+ GimpRGB rgb;
+
+ g_return_val_if_fail (GIMP_IS_DISPLAY_SHELL (shell), NULL);
+ g_return_val_if_fail (points != NULL && n_points > 1, NULL);
+ g_return_val_if_fail (GIMP_IS_CONTEXT (context), NULL);
+
+ array = gimp_array_new ((const guint8 *) points,
+ n_points * sizeof (GimpVector2), TRUE);
+
+ switch (color)
+ {
+ case GIMP_ACTIVE_COLOR_FOREGROUND:
+ gimp_context_get_foreground (context, &rgb);
+ break;
+
+ case GIMP_ACTIVE_COLOR_BACKGROUND:
+ gimp_context_get_background (context, &rgb);
+ break;
+ }
+
+ item = g_object_new (GIMP_TYPE_CANVAS_PEN,
+ "shell", shell,
+ "points", array,
+ "color", &rgb,
+ "width", width,
+ NULL);
+
+ gimp_array_free (array);
+
+ return item;
+}