gimpcanvaspen.c 7.08 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180
/* 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 <http://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 "gimpcanvaspen.h"
#include "gimpdisplayshell.h"
#include "gimpdisplayshell-style.h"
#include "gimpdisplayshell-transform.h"


enum
{
  PROP_0,
  PROP_COLOR,
  PROP_WIDTH
};


typedef struct _GimpCanvasPenPrivate GimpCanvasPenPrivate;

struct _GimpCanvasPenPrivate
{
  GimpRGB color;
  gint    width;
};

#define GET_PRIVATE(pen) \
        G_TYPE_INSTANCE_GET_PRIVATE (pen, \
                                     GIMP_TYPE_CANVAS_PEN, \
                                     GimpCanvasPenPrivate)


/*  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 GdkRegion * gimp_canvas_pen_get_extents  (GimpCanvasItem   *item,
                                                 GimpDisplayShell *shell);
static void        gimp_canvas_pen_stroke       (GimpCanvasItem   *item,
                                                 GimpDisplayShell *shell,
                                                 cairo_t          *cr);


G_DEFINE_TYPE (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));

  g_type_class_add_private (klass, sizeof (GimpCanvasPenPrivate));
}

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 GdkRegion *
gimp_canvas_pen_get_extents (GimpCanvasItem   *item,
                             GimpDisplayShell *shell)
{
  GimpCanvasPenPrivate *private = GET_PRIVATE (item);
  GdkRegion            *region;

  region = GIMP_CANVAS_ITEM_CLASS (parent_class)->get_extents (item, shell);

  if (region)
    {
      GdkRectangle rectangle;

      gdk_region_get_clipbox (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;
181 182

      gdk_region_union_with_rect (region, &rectangle);
183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239
    }

  return region;
}

static void
gimp_canvas_pen_stroke (GimpCanvasItem   *item,
                        GimpDisplayShell *shell,
                        cairo_t          *cr)
{
  GimpCanvasPenPrivate *private = GET_PRIVATE (item);

  gimp_display_shell_set_pen_style (shell, 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;
}