diff options
Diffstat (limited to 'app/display/gimpcanvaspath.c')
| -rw-r--r-- | app/display/gimpcanvaspath.c | 352 |
1 files changed, 352 insertions, 0 deletions
diff --git a/app/display/gimpcanvaspath.c b/app/display/gimpcanvaspath.c new file mode 100644 index 0000000..71a001f --- /dev/null +++ b/app/display/gimpcanvaspath.c @@ -0,0 +1,352 @@ +/* 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); +} |