360 lines
11 KiB
C
360 lines
11 KiB
C
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/* PIKA - Photo and Image Kooker Application
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* a rebranding of The GNU Image Manipulation Program (created with heckimp)
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* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
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*
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* Original copyright, applying to most contents (license remains unchanged):
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* pikacanvaspath.c
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* Copyright (C) 2010 Michael Natterer <mitch@gimp.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gegl.h>
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#include <gtk/gtk.h>
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#include "libpikabase/pikabase.h"
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#include "libpikamath/pikamath.h"
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#include "display-types.h"
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#include "core/pikabezierdesc.h"
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#include "core/pikaparamspecs.h"
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#include "pikacanvas-style.h"
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#include "pikacanvaspath.h"
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#include "pikadisplayshell.h"
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enum
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{
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PROP_0,
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PROP_PATH,
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PROP_X,
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PROP_Y,
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PROP_FILLED,
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PROP_PATH_STYLE
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};
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typedef struct _PikaCanvasPathPrivate PikaCanvasPathPrivate;
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struct _PikaCanvasPathPrivate
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{
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cairo_path_t *path;
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gdouble x;
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gdouble y;
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gboolean filled;
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PikaPathStyle path_style;
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};
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#define GET_PRIVATE(path) \
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((PikaCanvasPathPrivate *) pika_canvas_path_get_instance_private ((PikaCanvasPath *) (path)))
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/* local function prototypes */
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static void pika_canvas_path_finalize (GObject *object);
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static void pika_canvas_path_set_property (GObject *object,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec);
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static void pika_canvas_path_get_property (GObject *object,
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guint property_id,
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GValue *value,
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GParamSpec *pspec);
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static void pika_canvas_path_draw (PikaCanvasItem *item,
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cairo_t *cr);
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static cairo_region_t * pika_canvas_path_get_extents (PikaCanvasItem *item);
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static void pika_canvas_path_stroke (PikaCanvasItem *item,
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cairo_t *cr);
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G_DEFINE_TYPE_WITH_PRIVATE (PikaCanvasPath, pika_canvas_path,
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PIKA_TYPE_CANVAS_ITEM)
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#define parent_class pika_canvas_path_parent_class
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static void
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pika_canvas_path_class_init (PikaCanvasPathClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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PikaCanvasItemClass *item_class = PIKA_CANVAS_ITEM_CLASS (klass);
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object_class->finalize = pika_canvas_path_finalize;
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object_class->set_property = pika_canvas_path_set_property;
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object_class->get_property = pika_canvas_path_get_property;
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item_class->draw = pika_canvas_path_draw;
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item_class->get_extents = pika_canvas_path_get_extents;
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item_class->stroke = pika_canvas_path_stroke;
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g_object_class_install_property (object_class, PROP_PATH,
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g_param_spec_boxed ("path", NULL, NULL,
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PIKA_TYPE_BEZIER_DESC,
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PIKA_PARAM_READWRITE));
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g_object_class_install_property (object_class, PROP_X,
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g_param_spec_double ("x", NULL, NULL,
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-PIKA_MAX_IMAGE_SIZE,
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PIKA_MAX_IMAGE_SIZE, 0,
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PIKA_PARAM_READWRITE));
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g_object_class_install_property (object_class, PROP_Y,
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g_param_spec_double ("y", NULL, NULL,
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-PIKA_MAX_IMAGE_SIZE,
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PIKA_MAX_IMAGE_SIZE, 0,
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PIKA_PARAM_READWRITE));
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g_object_class_install_property (object_class, PROP_FILLED,
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g_param_spec_boolean ("filled", NULL, NULL,
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FALSE,
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PIKA_PARAM_READWRITE));
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g_object_class_install_property (object_class, PROP_PATH_STYLE,
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g_param_spec_enum ("path-style", NULL, NULL,
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PIKA_TYPE_PATH_STYLE,
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PIKA_PATH_STYLE_DEFAULT,
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PIKA_PARAM_READWRITE));
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}
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static void
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pika_canvas_path_init (PikaCanvasPath *path)
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{
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}
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static void
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pika_canvas_path_finalize (GObject *object)
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{
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PikaCanvasPathPrivate *private = GET_PRIVATE (object);
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if (private->path)
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{
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pika_bezier_desc_free (private->path);
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private->path = NULL;
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}
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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pika_canvas_path_set_property (GObject *object,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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PikaCanvasPathPrivate *private = GET_PRIVATE (object);
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switch (property_id)
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{
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case PROP_PATH:
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if (private->path)
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pika_bezier_desc_free (private->path);
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private->path = g_value_dup_boxed (value);
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break;
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case PROP_X:
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private->x = g_value_get_double (value);
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break;
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case PROP_Y:
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private->y = g_value_get_double (value);
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break;
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case PROP_FILLED:
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private->filled = g_value_get_boolean (value);
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break;
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case PROP_PATH_STYLE:
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private->path_style = g_value_get_enum (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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static void
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pika_canvas_path_get_property (GObject *object,
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guint property_id,
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GValue *value,
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GParamSpec *pspec)
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{
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PikaCanvasPathPrivate *private = GET_PRIVATE (object);
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switch (property_id)
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{
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case PROP_PATH:
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g_value_set_boxed (value, private->path);
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break;
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case PROP_X:
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g_value_set_double (value, private->x);
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break;
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case PROP_Y:
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g_value_set_double (value, private->y);
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break;
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case PROP_FILLED:
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g_value_set_boolean (value, private->filled);
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break;
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case PROP_PATH_STYLE:
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g_value_set_enum (value, private->path_style);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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static void
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pika_canvas_path_draw (PikaCanvasItem *item,
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cairo_t *cr)
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{
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PikaCanvasPathPrivate *private = GET_PRIVATE (item);
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if (private->path)
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{
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cairo_save (cr);
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pika_canvas_item_transform (item, cr);
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cairo_translate (cr, private->x, private->y);
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cairo_append_path (cr, private->path);
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cairo_restore (cr);
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if (private->filled)
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_pika_canvas_item_fill (item, cr);
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else
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_pika_canvas_item_stroke (item, cr);
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}
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}
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static cairo_region_t *
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pika_canvas_path_get_extents (PikaCanvasItem *item)
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{
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PikaCanvasPathPrivate *private = GET_PRIVATE (item);
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GtkWidget *canvas = pika_canvas_item_get_canvas (item);
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if (private->path && gtk_widget_get_realized (canvas))
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{
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cairo_surface_t *surface;
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cairo_t *cr;
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cairo_rectangle_int_t rectangle;
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gdouble x1, y1, x2, y2;
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surface = cairo_recording_surface_create (CAIRO_CONTENT_COLOR, NULL);
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cr = cairo_create (surface);
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cairo_surface_destroy (surface);
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cairo_save (cr);
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pika_canvas_item_transform (item, cr);
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cairo_translate (cr, private->x, private->y);
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cairo_append_path (cr, private->path);
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cairo_restore (cr);
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cairo_path_extents (cr, &x1, &y1, &x2, &y2);
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cairo_destroy (cr);
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if (private->filled)
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{
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rectangle.x = floor (x1 - 1.0);
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rectangle.y = floor (y1 - 1.0);
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rectangle.width = ceil (x2 + 1.0) - rectangle.x;
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rectangle.height = ceil (y2 + 1.0) - rectangle.y;
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}
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else
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{
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rectangle.x = floor (x1 - 1.5);
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rectangle.y = floor (y1 - 1.5);
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rectangle.width = ceil (x2 + 1.5) - rectangle.x;
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rectangle.height = ceil (y2 + 1.5) - rectangle.y;
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}
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return cairo_region_create_rectangle (&rectangle);
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}
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return NULL;
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}
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static void
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pika_canvas_path_stroke (PikaCanvasItem *item,
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cairo_t *cr)
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{
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PikaCanvasPathPrivate *private = GET_PRIVATE (item);
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GtkWidget *canvas = pika_canvas_item_get_canvas (item);
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gboolean active;
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switch (private->path_style)
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{
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case PIKA_PATH_STYLE_VECTORS:
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active = pika_canvas_item_get_highlight (item);
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pika_canvas_set_vectors_bg_style (canvas, cr, active);
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cairo_stroke_preserve (cr);
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pika_canvas_set_vectors_fg_style (canvas, cr, active);
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cairo_stroke (cr);
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break;
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case PIKA_PATH_STYLE_OUTLINE:
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pika_canvas_set_outline_bg_style (canvas, cr);
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cairo_stroke_preserve (cr);
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pika_canvas_set_outline_fg_style (canvas, cr);
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cairo_stroke (cr);
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break;
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case PIKA_PATH_STYLE_DEFAULT:
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PIKA_CANVAS_ITEM_CLASS (parent_class)->stroke (item, cr);
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break;
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}
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}
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PikaCanvasItem *
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pika_canvas_path_new (PikaDisplayShell *shell,
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const PikaBezierDesc *bezier,
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gdouble x,
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gdouble y,
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gboolean filled,
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PikaPathStyle style)
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{
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g_return_val_if_fail (PIKA_IS_DISPLAY_SHELL (shell), NULL);
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return g_object_new (PIKA_TYPE_CANVAS_PATH,
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"shell", shell,
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"path", bezier,
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"x", x,
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"y", y,
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"filled", filled,
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"path-style", style,
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NULL);
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}
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void
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pika_canvas_path_set (PikaCanvasItem *path,
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const PikaBezierDesc *bezier)
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{
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g_return_if_fail (PIKA_IS_CANVAS_PATH (path));
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pika_canvas_item_begin_change (path);
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g_object_set (path,
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"path", bezier,
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NULL);
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pika_canvas_item_end_change (path);
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}
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