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-rw-r--r--app/core/gimpgrid.c359
1 files changed, 359 insertions, 0 deletions
diff --git a/app/core/gimpgrid.c b/app/core/gimpgrid.c
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--- /dev/null
+++ b/app/core/gimpgrid.c
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+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * GimpGrid
+ * Copyright (C) 2003 Henrik Brix Andersen <brix@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 <string.h>
+
+#include <cairo.h>
+#include <gegl.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+#include "libgimpmath/gimpmath.h"
+#include "libgimpbase/gimpbase.h"
+#include "libgimpconfig/gimpconfig.h"
+
+#include "libgimpcolor/gimpcolor.h"
+
+#include "core-types.h"
+
+#include "gimpgrid.h"
+
+#include "gimp-intl.h"
+
+
+enum
+{
+ PROP_0,
+ PROP_STYLE,
+ PROP_FGCOLOR,
+ PROP_BGCOLOR,
+ PROP_XSPACING,
+ PROP_YSPACING,
+ PROP_SPACING_UNIT,
+ PROP_XOFFSET,
+ PROP_YOFFSET,
+ PROP_OFFSET_UNIT
+};
+
+
+static void gimp_grid_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec);
+static void gimp_grid_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec);
+
+
+G_DEFINE_TYPE_WITH_CODE (GimpGrid, gimp_grid, GIMP_TYPE_OBJECT,
+ G_IMPLEMENT_INTERFACE (GIMP_TYPE_CONFIG, NULL))
+
+
+static void
+gimp_grid_class_init (GimpGridClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ GimpRGB black;
+ GimpRGB white;
+
+ object_class->get_property = gimp_grid_get_property;
+ object_class->set_property = gimp_grid_set_property;
+
+ gimp_rgba_set (&black, 0.0, 0.0, 0.0, GIMP_OPACITY_OPAQUE);
+ gimp_rgba_set (&white, 1.0, 1.0, 1.0, GIMP_OPACITY_OPAQUE);
+
+ GIMP_CONFIG_PROP_ENUM (object_class, PROP_STYLE,
+ "style",
+ _("Line style"),
+ _("Line style used for the grid."),
+ GIMP_TYPE_GRID_STYLE,
+ GIMP_GRID_SOLID,
+ GIMP_PARAM_STATIC_STRINGS);
+
+ GIMP_CONFIG_PROP_RGB (object_class, PROP_FGCOLOR,
+ "fgcolor",
+ _("Foreground color"),
+ _("The foreground color of the grid."),
+ TRUE, &black,
+ GIMP_PARAM_STATIC_STRINGS);
+
+ GIMP_CONFIG_PROP_RGB (object_class, PROP_BGCOLOR,
+ "bgcolor",
+ _("Background color"),
+ _("The background color of the grid; "
+ "only used in double dashed line style."),
+ TRUE, &white,
+ GIMP_PARAM_STATIC_STRINGS);
+
+ GIMP_CONFIG_PROP_DOUBLE (object_class, PROP_XSPACING,
+ "xspacing",
+ _("Spacing X"),
+ _("Horizontal spacing of grid lines."),
+ 0.0, GIMP_MAX_IMAGE_SIZE, 10.0,
+ GIMP_PARAM_STATIC_STRINGS);
+
+ GIMP_CONFIG_PROP_DOUBLE (object_class, PROP_YSPACING,
+ "yspacing",
+ _("Spacing Y"),
+ _("Vertical spacing of grid lines."),
+ 0.0, GIMP_MAX_IMAGE_SIZE, 10.0,
+ GIMP_PARAM_STATIC_STRINGS);
+
+ GIMP_CONFIG_PROP_UNIT (object_class, PROP_SPACING_UNIT,
+ "spacing-unit",
+ _("Spacing unit"),
+ NULL,
+ FALSE, FALSE, GIMP_UNIT_INCH,
+ GIMP_PARAM_STATIC_STRINGS);
+
+ GIMP_CONFIG_PROP_DOUBLE (object_class, PROP_XOFFSET,
+ "xoffset",
+ _("Offset X"),
+ _("Horizontal offset of the first grid "
+ "line; this may be a negative number."),
+ - GIMP_MAX_IMAGE_SIZE,
+ GIMP_MAX_IMAGE_SIZE, 0.0,
+ GIMP_PARAM_STATIC_STRINGS);
+
+ GIMP_CONFIG_PROP_DOUBLE (object_class, PROP_YOFFSET,
+ "yoffset",
+ _("Offset Y"),
+ _("Vertical offset of the first grid "
+ "line; this may be a negative number."),
+ - GIMP_MAX_IMAGE_SIZE,
+ GIMP_MAX_IMAGE_SIZE, 0.0,
+ GIMP_PARAM_STATIC_STRINGS);
+
+ GIMP_CONFIG_PROP_UNIT (object_class, PROP_OFFSET_UNIT,
+ "offset-unit",
+ _("Offset unit"),
+ NULL,
+ FALSE, FALSE, GIMP_UNIT_INCH,
+ GIMP_PARAM_STATIC_STRINGS);
+}
+
+static void
+gimp_grid_init (GimpGrid *grid)
+{
+}
+
+static void
+gimp_grid_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GimpGrid *grid = GIMP_GRID (object);
+
+ switch (property_id)
+ {
+ case PROP_STYLE:
+ g_value_set_enum (value, grid->style);
+ break;
+ case PROP_FGCOLOR:
+ g_value_set_boxed (value, &grid->fgcolor);
+ break;
+ case PROP_BGCOLOR:
+ g_value_set_boxed (value, &grid->bgcolor);
+ break;
+ case PROP_XSPACING:
+ g_value_set_double (value, grid->xspacing);
+ break;
+ case PROP_YSPACING:
+ g_value_set_double (value, grid->yspacing);
+ break;
+ case PROP_SPACING_UNIT:
+ g_value_set_int (value, grid->spacing_unit);
+ break;
+ case PROP_XOFFSET:
+ g_value_set_double (value, grid->xoffset);
+ break;
+ case PROP_YOFFSET:
+ g_value_set_double (value, grid->yoffset);
+ break;
+ case PROP_OFFSET_UNIT:
+ g_value_set_int (value, grid->offset_unit);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_grid_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ GimpGrid *grid = GIMP_GRID (object);
+ GimpRGB *color;
+
+ switch (property_id)
+ {
+ case PROP_STYLE:
+ grid->style = g_value_get_enum (value);
+ break;
+ case PROP_FGCOLOR:
+ color = g_value_get_boxed (value);
+ grid->fgcolor = *color;
+ break;
+ case PROP_BGCOLOR:
+ color = g_value_get_boxed (value);
+ grid->bgcolor = *color;
+ break;
+ case PROP_XSPACING:
+ grid->xspacing = g_value_get_double (value);
+ break;
+ case PROP_YSPACING:
+ grid->yspacing = g_value_get_double (value);
+ break;
+ case PROP_SPACING_UNIT:
+ grid->spacing_unit = g_value_get_int (value);
+ break;
+ case PROP_XOFFSET:
+ grid->xoffset = g_value_get_double (value);
+ break;
+ case PROP_YOFFSET:
+ grid->yoffset = g_value_get_double (value);
+ break;
+ case PROP_OFFSET_UNIT:
+ grid->offset_unit = g_value_get_int (value);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+
+/* public functions */
+
+GimpGridStyle
+gimp_grid_get_style (GimpGrid *grid)
+{
+ g_return_val_if_fail (GIMP_IS_GRID (grid), GIMP_GRID_SOLID);
+
+ return grid->style;
+}
+
+void
+gimp_grid_get_fgcolor (GimpGrid *grid,
+ GimpRGB *fgcolor)
+{
+ g_return_if_fail (GIMP_IS_GRID (grid));
+ g_return_if_fail (fgcolor != NULL);
+
+ *fgcolor = grid->fgcolor;
+}
+
+void
+gimp_grid_get_bgcolor (GimpGrid *grid,
+ GimpRGB *bgcolor)
+{
+ g_return_if_fail (GIMP_IS_GRID (grid));
+ g_return_if_fail (bgcolor != NULL);
+
+ *bgcolor = grid->bgcolor;
+}
+
+void
+gimp_grid_get_spacing (GimpGrid *grid,
+ gdouble *xspacing,
+ gdouble *yspacing)
+{
+ g_return_if_fail (GIMP_IS_GRID (grid));
+
+ if (xspacing) *xspacing = grid->xspacing;
+ if (yspacing) *yspacing = grid->yspacing;
+}
+
+void
+gimp_grid_get_offset (GimpGrid *grid,
+ gdouble *xoffset,
+ gdouble *yoffset)
+{
+ g_return_if_fail (GIMP_IS_GRID (grid));
+
+ if (xoffset) *xoffset = grid->xoffset;
+ if (yoffset) *yoffset = grid->yoffset;
+}
+
+const gchar *
+gimp_grid_parasite_name (void)
+{
+ return "gimp-image-grid";
+}
+
+GimpParasite *
+gimp_grid_to_parasite (GimpGrid *grid)
+{
+ GimpParasite *parasite;
+ gchar *str;
+
+ g_return_val_if_fail (GIMP_IS_GRID (grid), NULL);
+
+ str = gimp_config_serialize_to_string (GIMP_CONFIG (grid), NULL);
+ g_return_val_if_fail (str != NULL, NULL);
+
+ parasite = gimp_parasite_new (gimp_grid_parasite_name (),
+ GIMP_PARASITE_PERSISTENT,
+ strlen (str) + 1, str);
+ g_free (str);
+
+ return parasite;
+}
+
+GimpGrid *
+gimp_grid_from_parasite (const GimpParasite *parasite)
+{
+ GimpGrid *grid;
+ const gchar *str;
+ GError *error = NULL;
+
+ g_return_val_if_fail (parasite != NULL, NULL);
+ g_return_val_if_fail (strcmp (gimp_parasite_name (parasite),
+ gimp_grid_parasite_name ()) == 0, NULL);
+
+ str = gimp_parasite_data (parasite);
+
+ if (! str)
+ {
+ g_warning ("Empty grid parasite");
+
+ return NULL;
+ }
+
+ grid = g_object_new (GIMP_TYPE_GRID, NULL);
+
+ if (! gimp_config_deserialize_string (GIMP_CONFIG (grid),
+ str,
+ gimp_parasite_data_size (parasite),
+ NULL,
+ &error))
+ {
+ g_warning ("Failed to deserialize grid parasite: %s", error->message);
+ g_error_free (error);
+ }
+
+ return grid;
+}
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