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-rw-r--r--app/display/gimpcanvaspath.c352
1 files changed, 352 insertions, 0 deletions
diff --git a/app/display/gimpcanvaspath.c b/app/display/gimpcanvaspath.c
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+++ b/app/display/gimpcanvaspath.c
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+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpcanvaspath.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 "libgimpmath/gimpmath.h"
+
+#include "display-types.h"
+
+#include "core/gimpbezierdesc.h"
+#include "core/gimpparamspecs.h"
+
+#include "gimpcanvas-style.h"
+#include "gimpcanvaspath.h"
+#include "gimpdisplayshell.h"
+
+
+enum
+{
+ PROP_0,
+ PROP_PATH,
+ PROP_X,
+ PROP_Y,
+ PROP_FILLED,
+ PROP_PATH_STYLE
+};
+
+
+typedef struct _GimpCanvasPathPrivate GimpCanvasPathPrivate;
+
+struct _GimpCanvasPathPrivate
+{
+ cairo_path_t *path;
+ gdouble x;
+ gdouble y;
+ gboolean filled;
+ GimpPathStyle path_style;
+};
+
+#define GET_PRIVATE(path) \
+ ((GimpCanvasPathPrivate *) gimp_canvas_path_get_instance_private ((GimpCanvasPath *) (path)))
+
+/* local function prototypes */
+
+static void gimp_canvas_path_finalize (GObject *object);
+static void gimp_canvas_path_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec);
+static void gimp_canvas_path_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec);
+static void gimp_canvas_path_draw (GimpCanvasItem *item,
+ cairo_t *cr);
+static cairo_region_t * gimp_canvas_path_get_extents (GimpCanvasItem *item);
+static void gimp_canvas_path_stroke (GimpCanvasItem *item,
+ cairo_t *cr);
+
+
+G_DEFINE_TYPE_WITH_PRIVATE (GimpCanvasPath, gimp_canvas_path,
+ GIMP_TYPE_CANVAS_ITEM)
+
+#define parent_class gimp_canvas_path_parent_class
+
+
+static void
+gimp_canvas_path_class_init (GimpCanvasPathClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ GimpCanvasItemClass *item_class = GIMP_CANVAS_ITEM_CLASS (klass);
+
+ object_class->finalize = gimp_canvas_path_finalize;
+ object_class->set_property = gimp_canvas_path_set_property;
+ object_class->get_property = gimp_canvas_path_get_property;
+
+ item_class->draw = gimp_canvas_path_draw;
+ item_class->get_extents = gimp_canvas_path_get_extents;
+ item_class->stroke = gimp_canvas_path_stroke;
+
+ g_object_class_install_property (object_class, PROP_PATH,
+ g_param_spec_boxed ("path", NULL, NULL,
+ GIMP_TYPE_BEZIER_DESC,
+ GIMP_PARAM_READWRITE));
+
+ g_object_class_install_property (object_class, PROP_X,
+ g_param_spec_double ("x", NULL, NULL,
+ -GIMP_MAX_IMAGE_SIZE,
+ GIMP_MAX_IMAGE_SIZE, 0,
+ GIMP_PARAM_READWRITE));
+
+ g_object_class_install_property (object_class, PROP_Y,
+ g_param_spec_double ("y", NULL, NULL,
+ -GIMP_MAX_IMAGE_SIZE,
+ GIMP_MAX_IMAGE_SIZE, 0,
+ GIMP_PARAM_READWRITE));
+
+ g_object_class_install_property (object_class, PROP_FILLED,
+ g_param_spec_boolean ("filled", NULL, NULL,
+ FALSE,
+ GIMP_PARAM_READWRITE));
+
+
+ g_object_class_install_property (object_class, PROP_PATH_STYLE,
+ g_param_spec_enum ("path-style", NULL, NULL,
+ GIMP_TYPE_PATH_STYLE,
+ GIMP_PATH_STYLE_DEFAULT,
+ GIMP_PARAM_READWRITE));
+}
+
+static void
+gimp_canvas_path_init (GimpCanvasPath *path)
+{
+}
+
+static void
+gimp_canvas_path_finalize (GObject *object)
+{
+ GimpCanvasPathPrivate *private = GET_PRIVATE (object);
+
+ if (private->path)
+ {
+ gimp_bezier_desc_free (private->path);
+ private->path = NULL;
+ }
+
+ G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static void
+gimp_canvas_path_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ GimpCanvasPathPrivate *private = GET_PRIVATE (object);
+
+ switch (property_id)
+ {
+ case PROP_PATH:
+ if (private->path)
+ gimp_bezier_desc_free (private->path);
+ private->path = g_value_dup_boxed (value);
+ break;
+ case PROP_X:
+ private->x = g_value_get_double (value);
+ break;
+ case PROP_Y:
+ private->y = g_value_get_double (value);
+ break;
+ case PROP_FILLED:
+ private->filled = g_value_get_boolean (value);
+ break;
+ case PROP_PATH_STYLE:
+ private->path_style = g_value_get_enum (value);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_canvas_path_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GimpCanvasPathPrivate *private = GET_PRIVATE (object);
+
+ switch (property_id)
+ {
+ case PROP_PATH:
+ g_value_set_boxed (value, private->path);
+ break;
+ case PROP_X:
+ g_value_set_double (value, private->x);
+ break;
+ case PROP_Y:
+ g_value_set_double (value, private->y);
+ break;
+ case PROP_FILLED:
+ g_value_set_boolean (value, private->filled);
+ break;
+ case PROP_PATH_STYLE:
+ g_value_set_enum (value, private->path_style);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_canvas_path_draw (GimpCanvasItem *item,
+ cairo_t *cr)
+{
+ GimpCanvasPathPrivate *private = GET_PRIVATE (item);
+
+ if (private->path)
+ {
+ cairo_save (cr);
+ gimp_canvas_item_transform (item, cr);
+ cairo_translate (cr, private->x, private->y);
+
+ cairo_append_path (cr, private->path);
+ cairo_restore (cr);
+
+ if (private->filled)
+ _gimp_canvas_item_fill (item, cr);
+ else
+ _gimp_canvas_item_stroke (item, cr);
+ }
+}
+
+static cairo_region_t *
+gimp_canvas_path_get_extents (GimpCanvasItem *item)
+{
+ GimpCanvasPathPrivate *private = GET_PRIVATE (item);
+ GtkWidget *canvas = gimp_canvas_item_get_canvas (item);
+
+ if (private->path && gtk_widget_get_realized (canvas))
+ {
+ cairo_t *cr;
+ cairo_rectangle_int_t rectangle;
+ gdouble x1, y1, x2, y2;
+
+ cr = gdk_cairo_create (gtk_widget_get_window (canvas));
+
+ cairo_save (cr);
+ gimp_canvas_item_transform (item, cr);
+ cairo_translate (cr, private->x, private->y);
+
+ cairo_append_path (cr, private->path);
+ cairo_restore (cr);
+
+ cairo_path_extents (cr, &x1, &y1, &x2, &y2);
+
+ cairo_destroy (cr);
+
+ if (private->filled)
+ {
+ rectangle.x = floor (x1 - 1.0);
+ rectangle.y = floor (y1 - 1.0);
+ rectangle.width = ceil (x2 + 1.0) - rectangle.x;
+ rectangle.height = ceil (y2 + 1.0) - rectangle.y;
+ }
+ else
+ {
+ rectangle.x = floor (x1 - 1.5);
+ rectangle.y = floor (y1 - 1.5);
+ rectangle.width = ceil (x2 + 1.5) - rectangle.x;
+ rectangle.height = ceil (y2 + 1.5) - rectangle.y;
+ }
+
+ return cairo_region_create_rectangle (&rectangle);
+ }
+
+ return NULL;
+}
+
+static void
+gimp_canvas_path_stroke (GimpCanvasItem *item,
+ cairo_t *cr)
+{
+ GimpCanvasPathPrivate *private = GET_PRIVATE (item);
+ GtkWidget *canvas = gimp_canvas_item_get_canvas (item);
+ gboolean active;
+
+ switch (private->path_style)
+ {
+ case GIMP_PATH_STYLE_VECTORS:
+ active = gimp_canvas_item_get_highlight (item);
+
+ gimp_canvas_set_vectors_bg_style (canvas, cr, active);
+ cairo_stroke_preserve (cr);
+
+ gimp_canvas_set_vectors_fg_style (canvas, cr, active);
+ cairo_stroke (cr);
+ break;
+
+ case GIMP_PATH_STYLE_OUTLINE:
+ gimp_canvas_set_outline_bg_style (canvas, cr);
+ cairo_stroke_preserve (cr);
+
+ gimp_canvas_set_outline_fg_style (canvas, cr);
+ cairo_stroke (cr);
+ break;
+
+ case GIMP_PATH_STYLE_DEFAULT:
+ GIMP_CANVAS_ITEM_CLASS (parent_class)->stroke (item, cr);
+ break;
+ }
+}
+
+GimpCanvasItem *
+gimp_canvas_path_new (GimpDisplayShell *shell,
+ const GimpBezierDesc *bezier,
+ gdouble x,
+ gdouble y,
+ gboolean filled,
+ GimpPathStyle style)
+{
+ g_return_val_if_fail (GIMP_IS_DISPLAY_SHELL (shell), NULL);
+
+ return g_object_new (GIMP_TYPE_CANVAS_PATH,
+ "shell", shell,
+ "path", bezier,
+ "x", x,
+ "y", y,
+ "filled", filled,
+ "path-style", style,
+ NULL);
+}
+
+void
+gimp_canvas_path_set (GimpCanvasItem *path,
+ const GimpBezierDesc *bezier)
+{
+ g_return_if_fail (GIMP_IS_CANVAS_PATH (path));
+
+ gimp_canvas_item_begin_change (path);
+
+ g_object_set (path,
+ "path", bezier,
+ NULL);
+
+ gimp_canvas_item_end_change (path);
+}