Adding upstream version 2.10.22.upstream/2.10.22upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1011 insertions, 0 deletions

diff --git a/plug-ins/common/grid.c b/plug-ins/common/grid.c
new file mode 100644
index 0000000..7abdf2f
--- /dev/null
+++ b/plug-ins/common/grid.c
@@ -0,0 +1,1011 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * 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/>.
+ */
+
+/* Original plug-in coded by Tim Newsome.
+ *
+ * Changed to make use of real-life units by Sven Neumann <sven@gimp.org>.
+ *
+ * The interface code is heavily commented in the hope that it will
+ * help other plug-in developers to adapt their plug-ins to make use
+ * of the gimp_size_entry functionality.
+ *
+ * Note: There is a convenience constructor called gimp_coordinetes_new ()
+ *       which simplifies the task of setting up a standard X,Y sizeentry.
+ *
+ * For more info and bugs see libgimp/gimpsizeentry.h and libgimp/gimpwidgets.h
+ *
+ * May 2000 tim copperfield [timecop@japan.co.jp]
+ * http://www.ne.jp/asahi/linux/timecop
+ * Added dynamic preview.  Due to weird implementation of signals from all
+ * controls, preview will not auto-update.  But this plugin isn't really
+ * crying for real-time updating either.
+ *
+ */
+
+#include "config.h"
+
+#include <string.h>
+
+#include <libgimp/gimp.h>
+#include <libgimp/gimpui.h>
+
+#include "libgimp/stdplugins-intl.h"
+
+
+#define PLUG_IN_PROC        "plug-in-grid"
+#define PLUG_IN_BINARY      "grid"
+#define PLUG_IN_ROLE        "gimp-grid"
+#define SPIN_BUTTON_WIDTH    8
+#define COLOR_BUTTON_WIDTH  55
+
+
+/* Declare local functions. */
+static void   query  (void);
+static void   run    (const gchar      *name,
+                      gint              nparams,
+                      const GimpParam  *param,
+                      gint             *nreturn_vals,
+                      GimpParam       **return_vals);
+
+static guchar      best_cmap_match (const guchar  *cmap,
+                                    gint           ncolors,
+                                    const GimpRGB *color);
+static void        grid            (gint32         image_ID,
+                                    gint32         drawable_ID,
+                                    GimpPreview   *preview);
+static gint        dialog          (gint32         image_ID,
+                                    gint32         drawable_ID);
+
+const GimpPlugInInfo PLUG_IN_INFO =
+{
+  NULL,  /* init_proc  */
+  NULL,  /* quit_proc  */
+  query, /* query_proc */
+  run,   /* run_proc   */
+};
+
+static gint sx1, sy1, sx2, sy2;
+
+static GtkWidget *main_dialog    = NULL;
+static GtkWidget *hcolor_button  = NULL;
+static GtkWidget *vcolor_button  = NULL;
+
+typedef struct
+{
+  gint    hwidth;
+  gint    hspace;
+  gint    hoffset;
+  GimpRGB hcolor;
+  gint    vwidth;
+  gint    vspace;
+  gint    voffset;
+  GimpRGB vcolor;
+  gint    iwidth;
+  gint    ispace;
+  gint    ioffset;
+  GimpRGB icolor;
+} Config;
+
+static Config grid_cfg =
+{
+  1, 16, 8, { 0.0, 0.0, 0.0, 1.0 },    /* horizontal   */
+  1, 16, 8, { 0.0, 0.0, 0.0, 1.0 },    /* vertical     */
+  0,  2, 6, { 0.0, 0.0, 0.0, 1.0 },    /* intersection */
+};
+
+
+MAIN ()
+
+static
+void query (void)
+{
+  static const GimpParamDef args[] =
+  {
+    { GIMP_PDB_INT32,    "run-mode", "The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }"   },
+    { GIMP_PDB_IMAGE,    "image",    "Input image"                    },
+    { GIMP_PDB_DRAWABLE, "drawable", "Input drawable"                 },
+
+    { GIMP_PDB_INT32,    "hwidth",   "Horizontal Width   (>= 0)"      },
+    { GIMP_PDB_INT32,    "hspace",   "Horizontal Spacing (>= 1)"      },
+    { GIMP_PDB_INT32,    "hoffset",  "Horizontal Offset  (>= 0)"      },
+    { GIMP_PDB_COLOR,    "hcolor",   "Horizontal Colour"              },
+    { GIMP_PDB_INT8,     "hopacity", "Horizontal Opacity (0...255)"   },
+
+    { GIMP_PDB_INT32,    "vwidth",   "Vertical Width   (>= 0)"        },
+    { GIMP_PDB_INT32,    "vspace",   "Vertical Spacing (>= 1)"        },
+    { GIMP_PDB_INT32,    "voffset",  "Vertical Offset  (>= 0)"        },
+    { GIMP_PDB_COLOR,    "vcolor",   "Vertical Colour"                },
+    { GIMP_PDB_INT8,     "vopacity", "Vertical Opacity (0...255)"     },
+
+    { GIMP_PDB_INT32,    "iwidth",   "Intersection Width   (>= 0)"    },
+    { GIMP_PDB_INT32,    "ispace",   "Intersection Spacing (>= 0)"    },
+    { GIMP_PDB_INT32,    "ioffset",  "Intersection Offset  (>= 0)"    },
+    { GIMP_PDB_COLOR,    "icolor",   "Intersection Colour"            },
+    { GIMP_PDB_INT8,     "iopacity", "Intersection Opacity (0...255)" }
+  };
+
+  gimp_install_procedure (PLUG_IN_PROC,
+                          N_("Draw a grid on the image"),
+                          "Draws a grid using the specified colors. "
+                          "The grid origin is the upper left corner.",
+                          "Tim Newsome",
+                          "Tim Newsome, Sven Neumann, Tom Rathborne, TC",
+                          "1997 - 2000",
+                          N_("_Grid (legacy)..."),
+                          "RGB*, GRAY*, INDEXED*",
+                          GIMP_PLUGIN,
+                          G_N_ELEMENTS (args), 0,
+                          args, NULL);
+
+  gimp_plugin_menu_register (PLUG_IN_PROC, "<Image>/Filters/Render/Pattern");
+}
+
+static void
+run (const gchar      *name,
+     gint              n_params,
+     const GimpParam  *param,
+     gint             *nreturn_vals,
+     GimpParam       **return_vals)
+{
+  static GimpParam   values[1];
+  gint32             image_ID;
+  gint32             drawable_ID;
+  GimpRunMode        run_mode;
+  GimpPDBStatusType  status = GIMP_PDB_SUCCESS;
+
+  INIT_I18N ();
+  gegl_init (NULL, NULL);
+
+  *nreturn_vals = 1;
+  *return_vals  = values;
+
+  run_mode    = param[0].data.d_int32;
+  image_ID    = param[1].data.d_int32;
+  drawable_ID = param[2].data.d_drawable;
+
+  if (run_mode == GIMP_RUN_NONINTERACTIVE)
+    {
+      if (n_params != 18)
+        status = GIMP_PDB_CALLING_ERROR;
+
+      if (status == GIMP_PDB_SUCCESS)
+        {
+          grid_cfg.hwidth  = MAX (0, param[3].data.d_int32);
+          grid_cfg.hspace  = MAX (1, param[4].data.d_int32);
+          grid_cfg.hoffset = MAX (0, param[5].data.d_int32);
+          grid_cfg.hcolor  = param[6].data.d_color;
+
+          gimp_rgb_set_alpha (&(grid_cfg.hcolor),
+                              ((double) param[7].data.d_int8) / 255.0);
+
+
+          grid_cfg.vwidth  = MAX (0, param[8].data.d_int32);
+          grid_cfg.vspace  = MAX (1, param[9].data.d_int32);
+          grid_cfg.voffset = MAX (0, param[10].data.d_int32);
+          grid_cfg.vcolor  = param[11].data.d_color;
+
+          gimp_rgb_set_alpha (&(grid_cfg.vcolor),
+                              ((double) param[12].data.d_int8) / 255.0);
+
+
+
+          grid_cfg.iwidth  = MAX (0, param[13].data.d_int32);
+          grid_cfg.ispace  = MAX (0, param[14].data.d_int32);
+          grid_cfg.ioffset = MAX (0, param[15].data.d_int32);
+          grid_cfg.icolor  = param[16].data.d_color;
+
+          gimp_rgb_set_alpha (&(grid_cfg.icolor),
+                              ((double) (guint) param[17].data.d_int8) / 255.0);
+
+
+        }
+    }
+  else
+    {
+      gimp_context_get_foreground (&grid_cfg.hcolor);
+      grid_cfg.vcolor = grid_cfg.icolor = grid_cfg.hcolor;
+
+      /*  Possibly retrieve data  */
+      gimp_get_data (PLUG_IN_PROC, &grid_cfg);
+    }
+
+  if (run_mode == GIMP_RUN_INTERACTIVE)
+    {
+      if (! dialog (image_ID, drawable_ID))
+        {
+          /* The dialog was closed, or something similarly evil happened. */
+          status = GIMP_PDB_EXECUTION_ERROR;
+        }
+    }
+
+  if (grid_cfg.hspace <= 0 || grid_cfg.vspace <= 0)
+    {
+      status = GIMP_PDB_EXECUTION_ERROR;
+    }
+
+  if (status == GIMP_PDB_SUCCESS)
+    {
+      gimp_progress_init (_("Drawing grid"));
+
+      grid (image_ID, drawable_ID, NULL);
+
+      if (run_mode != GIMP_RUN_NONINTERACTIVE)
+        gimp_displays_flush ();
+
+      if (run_mode == GIMP_RUN_INTERACTIVE)
+        gimp_set_data (PLUG_IN_PROC, &grid_cfg, sizeof (grid_cfg));
+    }
+
+  values[0].type          = GIMP_PDB_STATUS;
+  values[0].data.d_status = status;
+}
+
+
+#define MAXDIFF 195076
+
+static guchar
+best_cmap_match (const guchar  *cmap,
+                 gint           ncolors,
+                 const GimpRGB *color)
+{
+  guchar cmap_index = 0;
+  gint   max = MAXDIFF;
+  gint   i, diff, sum;
+  guchar r, g, b;
+
+  gimp_rgb_get_uchar (color, &r, &g, &b);
+
+  for (i = 0; i < ncolors; i++)
+    {
+      diff = r - *cmap++;
+      sum = SQR (diff);
+      diff = g - *cmap++;
+      sum += SQR (diff);
+      diff = b - *cmap++;
+      sum += SQR (diff);
+
+      if (sum < max)
+        {
+          cmap_index = i;
+          max = sum;
+        }
+    }
+
+  return cmap_index;
+}
+
+static inline void
+pix_composite (guchar   *p1,
+               guchar    p2[4],
+               gint      bytes,
+               gboolean  blend,
+               gboolean  alpha)
+{
+  gint b;
+
+  if (blend)
+    {
+      if (alpha)
+        bytes--;
+
+      for (b = 0; b < bytes; b++)
+        {
+          *p1 = *p1 * (1.0 - p2[3]/255.0) + p2[b] * p2[3]/255.0;
+          p1++;
+        }
+    }
+  else
+    {
+      /* blend should only be TRUE for indexed (bytes == 1) */
+      *p1++ = *p2;
+    }
+
+  if (alpha && *p1 < 255)
+    {
+      b = *p1 + 255.0 * ((gdouble) p2[3] / (255.0 - *p1));
+
+      *p1 = b > 255 ? 255 : b;
+    }
+}
+
+static void
+grid (gint32       image_ID,
+      gint32       drawable_ID,
+      GimpPreview *preview)
+{
+  GeglBuffer *src_buffer;
+  GeglBuffer *dest_buffer;
+  const Babl *format;
+  gint        bytes;
+  gint        x_offset;
+  gint        y_offset;
+  guchar     *dest;
+  guchar     *buffer = NULL;
+  gint        x, y;
+  gboolean    alpha;
+  gboolean    blend;
+  guchar      hcolor[4];
+  guchar      vcolor[4];
+  guchar      icolor[4];
+  guchar     *cmap;
+  gint        ncolors;
+
+  gimp_rgba_get_uchar (&grid_cfg.hcolor,
+                       hcolor, hcolor + 1, hcolor + 2, hcolor + 3);
+  gimp_rgba_get_uchar (&grid_cfg.vcolor,
+                       vcolor, vcolor + 1, vcolor + 2, vcolor + 3);
+  gimp_rgba_get_uchar (&grid_cfg.icolor,
+                       icolor, icolor + 1, icolor + 2, icolor + 3);
+
+  alpha = gimp_drawable_has_alpha (drawable_ID);
+
+  switch (gimp_image_base_type (image_ID))
+    {
+    case GIMP_RGB:
+      blend = TRUE;
+
+      if (alpha)
+        format = babl_format ("R'G'B'A u8");
+      else
+        format = babl_format ("R'G'B' u8");
+      break;
+
+    case GIMP_GRAY:
+      hcolor[0] = gimp_rgb_luminance_uchar (&grid_cfg.hcolor);
+      vcolor[0] = gimp_rgb_luminance_uchar (&grid_cfg.vcolor);
+      icolor[0] = gimp_rgb_luminance_uchar (&grid_cfg.icolor);
+      blend = TRUE;
+
+      if (alpha)
+        format = babl_format ("Y'A u8");
+      else
+        format = babl_format ("Y' u8");
+      break;
+
+    case GIMP_INDEXED:
+      cmap = gimp_image_get_colormap (image_ID, &ncolors);
+
+      hcolor[0] = best_cmap_match (cmap, ncolors, &grid_cfg.hcolor);
+      vcolor[0] = best_cmap_match (cmap, ncolors, &grid_cfg.vcolor);
+      icolor[0] = best_cmap_match (cmap, ncolors, &grid_cfg.icolor);
+
+      g_free (cmap);
+      blend = FALSE;
+
+      format = gimp_drawable_get_format (drawable_ID);
+      break;
+
+    default:
+      g_assert_not_reached ();
+      blend = FALSE;
+    }
+
+  bytes = babl_format_get_bytes_per_pixel (format);
+
+  if (preview)
+    {
+      gimp_preview_get_position (preview, &sx1, &sy1);
+      gimp_preview_get_size (preview, &sx2, &sy2);
+
+      buffer = g_new (guchar, bytes * sx2 * sy2);
+
+      sx2 += sx1;
+      sy2 += sy1;
+    }
+  else
+    {
+      gint w, h;
+
+      if (! gimp_drawable_mask_intersect (drawable_ID,
+                                          &sx1, &sy1, &w, &h))
+        return;
+
+      sx2 = sx1 + w;
+      sy2 = sy1 + h;
+
+      dest_buffer = gimp_drawable_get_shadow_buffer (drawable_ID);
+    }
+
+  src_buffer = gimp_drawable_get_buffer (drawable_ID);
+
+  dest = g_new (guchar, (sx2 - sx1) * bytes);
+
+  for (y = sy1; y < sy2; y++)
+    {
+      gegl_buffer_get (src_buffer, GEGL_RECTANGLE (sx1, y, sx2 - sx1, 1), 1.0,
+                       format, dest,
+                       GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
+
+      y_offset = y - grid_cfg.hoffset;
+      while (y_offset < 0)
+        y_offset += grid_cfg.hspace;
+
+      if ((y_offset +
+           (grid_cfg.hwidth / 2)) % grid_cfg.hspace < grid_cfg.hwidth)
+        {
+          for (x = sx1; x < sx2; x++)
+            {
+              pix_composite (&dest[(x-sx1) * bytes],
+                             hcolor, bytes, blend, alpha);
+            }
+        }
+
+      for (x = sx1; x < sx2; x++)
+        {
+          x_offset = grid_cfg.vspace + x - grid_cfg.voffset;
+          while (x_offset < 0)
+            x_offset += grid_cfg.vspace;
+
+          if ((x_offset +
+               (grid_cfg.vwidth / 2)) % grid_cfg.vspace < grid_cfg.vwidth)
+            {
+              pix_composite (&dest[(x-sx1) * bytes],
+                             vcolor, bytes, blend, alpha);
+            }
+
+          if ((x_offset +
+               (grid_cfg.iwidth / 2)) % grid_cfg.vspace < grid_cfg.iwidth
+              &&
+              ((y_offset % grid_cfg.hspace >= grid_cfg.ispace
+                &&
+                y_offset % grid_cfg.hspace < grid_cfg.ioffset)
+               ||
+               (grid_cfg.hspace -
+                (y_offset % grid_cfg.hspace) >= grid_cfg.ispace
+                &&
+                grid_cfg.hspace -
+                (y_offset % grid_cfg.hspace) < grid_cfg.ioffset)))
+            {
+              pix_composite (&dest[(x-sx1) * bytes],
+                             icolor, bytes, blend, alpha);
+            }
+        }
+
+      if ((y_offset +
+           (grid_cfg.iwidth / 2)) % grid_cfg.hspace < grid_cfg.iwidth)
+        {
+          for (x = sx1; x < sx2; x++)
+            {
+              x_offset = grid_cfg.vspace + x - grid_cfg.voffset;
+              while (x_offset < 0)
+                x_offset += grid_cfg.vspace;
+
+              if ((x_offset % grid_cfg.vspace >= grid_cfg.ispace
+                   &&
+                   x_offset % grid_cfg.vspace < grid_cfg.ioffset)
+                  ||
+                  (grid_cfg.vspace -
+                   (x_offset % grid_cfg.vspace) >= grid_cfg.ispace
+                   &&
+                   grid_cfg.vspace -
+                   (x_offset % grid_cfg.vspace) < grid_cfg.ioffset))
+                {
+                  pix_composite (&dest[(x-sx1) * bytes],
+                                 icolor, bytes, blend, alpha);
+                }
+            }
+        }
+
+      if (preview)
+        {
+          memcpy (buffer + (y - sy1) * (sx2 - sx1) * bytes,
+                  dest,
+                  (sx2 - sx1) * bytes);
+        }
+      else
+        {
+          gegl_buffer_set (dest_buffer,
+                           GEGL_RECTANGLE (sx1, y, sx2 - sx1, 1), 0,
+                           format, dest,
+                           GEGL_AUTO_ROWSTRIDE);
+
+          if (y % 16 == 0)
+            gimp_progress_update ((gdouble) y / (gdouble) (sy2 - sy1));
+        }
+    }
+
+  g_free (dest);
+
+  g_object_unref (src_buffer);
+
+  if (preview)
+    {
+      gimp_preview_draw_buffer (preview, buffer, bytes * (sx2 - sx1));
+      g_free (buffer);
+    }
+  else
+    {
+      gimp_progress_update (1.0);
+
+      g_object_unref (dest_buffer);
+
+      gimp_drawable_merge_shadow (drawable_ID, TRUE);
+      gimp_drawable_update (drawable_ID,
+                            sx1, sy1, sx2 - sx1, sy2 - sy1);
+    }
+}
+
+
+/***************************************************
+ * GUI stuff
+ */
+
+
+static void
+update_values (void)
+{
+  GtkWidget *entry;
+
+  entry = g_object_get_data (G_OBJECT (main_dialog), "width");
+
+  grid_cfg.hwidth =
+    RINT (gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (entry), 0));
+  grid_cfg.vwidth =
+    RINT (gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (entry), 1));
+  grid_cfg.iwidth =
+    RINT (gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (entry), 2));
+
+  entry = g_object_get_data (G_OBJECT (main_dialog), "space");
+
+  grid_cfg.hspace =
+    RINT (gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (entry), 0));
+  grid_cfg.vspace =
+    RINT (gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (entry), 1));
+  grid_cfg.ispace =
+    RINT (gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (entry), 2));
+
+  entry = g_object_get_data (G_OBJECT (main_dialog), "offset");
+
+  grid_cfg.hoffset =
+    RINT (gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (entry), 0));
+  grid_cfg.voffset =
+    RINT (gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (entry), 1));
+  grid_cfg.ioffset =
+    RINT (gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (entry), 2));
+}
+
+static void
+update_preview (GimpPreview  *preview,
+                gpointer      drawable_ID)
+{
+  update_values ();
+
+  grid (gimp_item_get_image (GPOINTER_TO_INT (drawable_ID)),
+        GPOINTER_TO_INT (drawable_ID),
+        preview);
+}
+
+static void
+entry_callback (GtkWidget *widget,
+                gpointer   data)
+{
+  static gdouble x = -1.0;
+  static gdouble y = -1.0;
+  gdouble new_x;
+  gdouble new_y;
+
+  new_x = gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (widget), 0);
+  new_y = gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (widget), 1);
+
+  if (gimp_chain_button_get_active (GIMP_CHAIN_BUTTON (data)))
+    {
+      if (new_x != x)
+        {
+          y = new_y = x = new_x;
+          gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (widget), 1, y);
+        }
+      if (new_y != y)
+        {
+          x = new_x = y = new_y;
+          gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (widget), 0, x);
+        }
+    }
+  else
+    {
+      x = new_x;
+      y = new_y;
+    }
+}
+
+static void
+color_callback (GtkWidget *widget,
+                gpointer   data)
+{
+  if (gimp_chain_button_get_active (GIMP_CHAIN_BUTTON (data)))
+    {
+      GimpRGB  color;
+
+      gimp_color_button_get_color (GIMP_COLOR_BUTTON (widget), &color);
+
+      if (widget == vcolor_button)
+        gimp_color_button_set_color (GIMP_COLOR_BUTTON (hcolor_button), &color);
+      else if (widget == hcolor_button)
+        gimp_color_button_set_color (GIMP_COLOR_BUTTON (vcolor_button), &color);
+    }
+}
+
+
+static gint
+dialog (gint32 image_ID,
+        gint32 drawable_ID)
+{
+  GimpColorConfig *config;
+  GtkWidget       *dlg;
+  GtkWidget       *main_vbox;
+  GtkWidget       *vbox;
+  GtkSizeGroup    *group;
+  GtkWidget       *label;
+  GtkWidget       *preview;
+  GtkWidget       *button;
+  GtkWidget       *width;
+  GtkWidget       *space;
+  GtkWidget       *offset;
+  GtkWidget       *chain_button;
+  GtkWidget       *table;
+  GimpUnit         unit;
+  gint             d_width;
+  gint             d_height;
+  gdouble          xres;
+  gdouble          yres;
+  gboolean         run;
+
+  g_return_val_if_fail (main_dialog == NULL, FALSE);
+
+  gimp_ui_init (PLUG_IN_BINARY, TRUE);
+
+  d_width  = gimp_drawable_width  (drawable_ID);
+  d_height = gimp_drawable_height (drawable_ID);
+
+  main_dialog = dlg = gimp_dialog_new (_("Grid"), PLUG_IN_ROLE,
+                                       NULL, 0,
+                                       gimp_standard_help_func, PLUG_IN_PROC,
+
+                                       _("_Cancel"), GTK_RESPONSE_CANCEL,
+                                       _("_OK"),     GTK_RESPONSE_OK,
+
+                                       NULL);
+
+  gtk_dialog_set_alternative_button_order (GTK_DIALOG (dlg),
+                                           GTK_RESPONSE_OK,
+                                           GTK_RESPONSE_CANCEL,
+                                           -1);
+
+  gimp_window_set_transient (GTK_WINDOW (dlg));
+
+  /*  Get the image resolution and unit  */
+  gimp_image_get_resolution (image_ID, &xres, &yres);
+  unit = gimp_image_get_unit (image_ID);
+
+  main_vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
+  gtk_container_set_border_width (GTK_CONTAINER (main_vbox), 12);
+  gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (dlg))),
+                      main_vbox, TRUE, TRUE, 0);
+  gtk_widget_show (main_vbox);
+
+  preview = gimp_drawable_preview_new_from_drawable_id (drawable_ID);
+  gtk_box_pack_start (GTK_BOX (main_vbox), preview, TRUE, TRUE, 0);
+  gtk_widget_show (preview);
+
+  g_signal_connect (preview, "invalidated",
+                    G_CALLBACK (update_preview),
+                    GINT_TO_POINTER (drawable_ID));
+
+  vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 2);
+  gtk_box_pack_start (GTK_BOX (main_vbox), vbox, FALSE, FALSE, 0);
+  gtk_widget_show (vbox);
+
+  /*  The width entries  */
+  width = gimp_size_entry_new (3,                            /*  number_of_fields  */
+                               unit,                         /*  unit              */
+                               "%a",                         /*  unit_format       */
+                               TRUE,                         /*  menu_show_pixels  */
+                               TRUE,                         /*  menu_show_percent */
+                               FALSE,                        /*  show_refval       */
+                               SPIN_BUTTON_WIDTH,            /*  spinbutton_usize  */
+                               GIMP_SIZE_ENTRY_UPDATE_SIZE); /*  update_policy     */
+
+
+  gtk_box_pack_start (GTK_BOX (vbox), width, FALSE, FALSE, 0);
+  gtk_widget_show (width);
+
+  /*  set the unit back to pixels, since most times we will want pixels */
+  gimp_size_entry_set_unit (GIMP_SIZE_ENTRY (width), GIMP_UNIT_PIXEL);
+
+  /*  set the resolution to the image resolution  */
+  gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (width), 0, xres, TRUE);
+  gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (width), 1, yres, TRUE);
+  gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (width), 2, xres, TRUE);
+
+  /*  set the size (in pixels) that will be treated as 0% and 100%  */
+  gimp_size_entry_set_size (GIMP_SIZE_ENTRY (width), 0, 0.0, d_height);
+  gimp_size_entry_set_size (GIMP_SIZE_ENTRY (width), 1, 0.0, d_width);
+  gimp_size_entry_set_size (GIMP_SIZE_ENTRY (width), 2, 0.0, d_width);
+
+  /*  set upper and lower limits (in pixels)  */
+  gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (width), 0, 0.0,
+                                         d_height);
+  gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (width), 1, 0.0,
+                                         d_width);
+  gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (width), 2, 0.0,
+                                         MAX (d_width, d_height));
+  gtk_table_set_row_spacing (GTK_TABLE (width), 0, 6);
+  gtk_table_set_col_spacings (GTK_TABLE (width), 6);
+  gtk_table_set_col_spacing (GTK_TABLE (width), 2, 12);
+
+  /*  initialize the values  */
+  gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (width), 0, grid_cfg.hwidth);
+  gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (width), 1, grid_cfg.vwidth);
+  gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (width), 2, grid_cfg.iwidth);
+
+  /*  attach labels  */
+  gimp_size_entry_attach_label (GIMP_SIZE_ENTRY (width), _("Horizontal\nLines"),
+                                0, 1, 0.0);
+  gimp_size_entry_attach_label (GIMP_SIZE_ENTRY (width), _("Vertical\nLines"),
+                                0, 2, 0.0);
+  gimp_size_entry_attach_label (GIMP_SIZE_ENTRY (width), _("Intersection"),
+                                0, 3, 0.0);
+
+  label = gimp_size_entry_attach_label (GIMP_SIZE_ENTRY (width), _("Width:"),
+                                        1, 0, 0.0);
+
+  group = gtk_size_group_new (GTK_SIZE_GROUP_HORIZONTAL);
+  gtk_size_group_add_widget (group, label);
+  g_object_unref (group);
+
+  /*  put a chain_button under the size_entries  */
+  chain_button = gimp_chain_button_new (GIMP_CHAIN_BOTTOM);
+  if (grid_cfg.hwidth == grid_cfg.vwidth)
+    gimp_chain_button_set_active (GIMP_CHAIN_BUTTON (chain_button), TRUE);
+  gtk_table_attach_defaults (GTK_TABLE (width), chain_button, 1, 3, 2, 3);
+  gtk_widget_show (chain_button);
+
+  /* connect to the 'value-changed' signal because we have to take care
+   * of keeping the entries in sync when the chainbutton is active
+   */
+  g_signal_connect (width, "value-changed",
+                    G_CALLBACK (entry_callback),
+                    chain_button);
+  g_signal_connect_swapped (width, "value-changed",
+                            G_CALLBACK (gimp_preview_invalidate),
+                            preview);
+
+  /*  The spacing entries  */
+  space = gimp_size_entry_new (3,                            /*  number_of_fields  */
+                               unit,                         /*  unit              */
+                               "%a",                         /*  unit_format       */
+                               TRUE,                         /*  menu_show_pixels  */
+                               TRUE,                         /*  menu_show_percent */
+                               FALSE,                        /*  show_refval       */
+                               SPIN_BUTTON_WIDTH,            /*  spinbutton_usize  */
+                               GIMP_SIZE_ENTRY_UPDATE_SIZE); /*  update_policy     */
+
+  gtk_box_pack_start (GTK_BOX (vbox), space, FALSE, FALSE, 0);
+  gtk_widget_show (space);
+
+  gimp_size_entry_set_unit (GIMP_SIZE_ENTRY (space), GIMP_UNIT_PIXEL);
+
+  /*  set the resolution to the image resolution  */
+  gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (space), 0, xres, TRUE);
+  gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (space), 1, yres, TRUE);
+  gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (space), 2, xres, TRUE);
+
+  /*  set the size (in pixels) that will be treated as 0% and 100%  */
+  gimp_size_entry_set_size (GIMP_SIZE_ENTRY (space), 0, 0.0, d_height);
+  gimp_size_entry_set_size (GIMP_SIZE_ENTRY (space), 1, 0.0, d_width);
+  gimp_size_entry_set_size (GIMP_SIZE_ENTRY (space), 2, 0.0, d_width);
+
+  /*  set upper and lower limits (in pixels)  */
+  gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (space), 0, 1.0,
+                                         d_height);
+  gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (space), 1, 1.0,
+                                         d_width);
+  gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (space), 2, 0.0,
+                                         MAX (d_width, d_height));
+  gtk_table_set_col_spacings (GTK_TABLE (space), 6);
+  gtk_table_set_col_spacing (GTK_TABLE (space), 2, 12);
+
+  /*  initialize the values  */
+  gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (space), 0, grid_cfg.hspace);
+  gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (space), 1, grid_cfg.vspace);
+  gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (space), 2, grid_cfg.ispace);
+
+  /*  attach labels  */
+  label = gimp_size_entry_attach_label (GIMP_SIZE_ENTRY (space), _("Spacing:"),
+                                        1, 0, 0.0);
+  gtk_size_group_add_widget (group, label);
+
+  /*  put a chain_button under the spacing_entries  */
+  chain_button = gimp_chain_button_new (GIMP_CHAIN_BOTTOM);
+  if (grid_cfg.hspace == grid_cfg.vspace)
+    gimp_chain_button_set_active (GIMP_CHAIN_BUTTON (chain_button), TRUE);
+  gtk_table_attach_defaults (GTK_TABLE (space), chain_button, 1, 3, 2, 3);
+  gtk_widget_show (chain_button);
+
+  /* connect to the 'value-changed' and "unit-changed" signals because
+   * we have to take care of keeping the entries in sync when the
+   * chainbutton is active
+   */
+  g_signal_connect (space, "value-changed",
+                    G_CALLBACK (entry_callback),
+                    chain_button);
+  g_signal_connect (space, "unit-changed",
+                    G_CALLBACK (entry_callback),
+                    chain_button);
+  g_signal_connect_swapped (space, "value-changed",
+                            G_CALLBACK (gimp_preview_invalidate),
+                            preview);
+
+  /*  The offset entries  */
+  offset = gimp_size_entry_new (3,                            /*  number_of_fields  */
+                                unit,                         /*  unit              */
+                                "%a",                         /*  unit_format       */
+                                TRUE,                         /*  menu_show_pixels  */
+                                TRUE,                         /*  menu_show_percent */
+                                FALSE,                        /*  show_refval       */
+                                SPIN_BUTTON_WIDTH,            /*  spinbutton_usize  */
+                                GIMP_SIZE_ENTRY_UPDATE_SIZE); /*  update_policy     */
+
+  gtk_box_pack_start (GTK_BOX (vbox), offset, FALSE, FALSE, 0);
+  gtk_widget_show (offset);
+
+  gimp_size_entry_set_unit (GIMP_SIZE_ENTRY (offset), GIMP_UNIT_PIXEL);
+
+  /*  set the resolution to the image resolution  */
+  gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (offset), 0, xres, TRUE);
+  gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (offset), 1, yres, TRUE);
+  gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (offset), 2, xres, TRUE);
+
+  /*  set the size (in pixels) that will be treated as 0% and 100%  */
+  gimp_size_entry_set_size (GIMP_SIZE_ENTRY (offset), 0, 0.0, d_height);
+  gimp_size_entry_set_size (GIMP_SIZE_ENTRY (offset), 1, 0.0, d_width);
+  gimp_size_entry_set_size (GIMP_SIZE_ENTRY (offset), 2, 0.0, d_width);
+
+  /*  set upper and lower limits (in pixels)  */
+  gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (offset), 0, 0.0,
+                                         d_height);
+  gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (offset), 1, 0.0,
+                                         d_width);
+  gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (offset), 2, 0.0,
+                                         MAX (d_width, d_height));
+  gtk_table_set_col_spacings (GTK_TABLE (offset), 6);
+  gtk_table_set_col_spacing (GTK_TABLE (offset), 2, 12);
+
+  /*  initialize the values  */
+  gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (offset), 0, grid_cfg.hoffset);
+  gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (offset), 1, grid_cfg.voffset);
+  gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (offset), 2, grid_cfg.ioffset);
+
+  /*  attach labels  */
+  label = gimp_size_entry_attach_label (GIMP_SIZE_ENTRY (offset), _("Offset:"),
+                                        1, 0, 0.0);
+  gtk_size_group_add_widget (group, label);
+
+  /*  this is a weird hack: we put a table into the offset table  */
+  table = gtk_table_new (3, 3, FALSE);
+  gtk_table_attach_defaults (GTK_TABLE (offset), table, 1, 4, 2, 3);
+  gtk_table_set_row_spacing (GTK_TABLE (table), 0, 10);
+  gtk_table_set_col_spacing (GTK_TABLE (table), 1, 12);
+
+  /*  put a chain_button under the offset_entries  */
+  chain_button = gimp_chain_button_new (GIMP_CHAIN_BOTTOM);
+  if (grid_cfg.hoffset == grid_cfg.voffset)
+    gimp_chain_button_set_active (GIMP_CHAIN_BUTTON (chain_button), TRUE);
+  gtk_table_attach_defaults (GTK_TABLE (table), chain_button, 0, 2, 0, 1);
+  gtk_widget_show (chain_button);
+
+  /* connect to the 'value-changed' and "unit-changed" signals because
+   * we have to take care of keeping the entries in sync when the
+   * chainbutton is active
+   */
+  g_signal_connect (offset, "value-changed",
+                    G_CALLBACK (entry_callback),
+                    chain_button);
+  g_signal_connect (offset, "unit-changed",
+                    G_CALLBACK (entry_callback),
+                    chain_button);
+  g_signal_connect_swapped (offset, "value-changed",
+                            G_CALLBACK (gimp_preview_invalidate),
+                            preview);
+
+  /*  put a chain_button under the color_buttons  */
+  chain_button = gimp_chain_button_new (GIMP_CHAIN_BOTTOM);
+  if (gimp_rgba_distance (&grid_cfg.hcolor, &grid_cfg.vcolor) < 0.0001)
+    gimp_chain_button_set_active (GIMP_CHAIN_BUTTON (chain_button), TRUE);
+  gtk_table_attach_defaults (GTK_TABLE (table), chain_button, 0, 2, 2, 3);
+  gtk_widget_show (chain_button);
+
+  /*  attach color selectors  */
+  hcolor_button = gimp_color_button_new (_("Horizontal Color"),
+                                         COLOR_BUTTON_WIDTH, 16,
+                                         &grid_cfg.hcolor,
+                                         GIMP_COLOR_AREA_SMALL_CHECKS);
+  gimp_color_button_set_update (GIMP_COLOR_BUTTON (hcolor_button), TRUE);
+  gtk_table_attach_defaults (GTK_TABLE (table), hcolor_button, 0, 1, 1, 2);
+  gtk_widget_show (hcolor_button);
+
+  config = gimp_get_color_configuration ();
+  gimp_color_button_set_color_config (GIMP_COLOR_BUTTON (hcolor_button),
+                                      config);
+
+  g_signal_connect (hcolor_button, "color-changed",
+                    G_CALLBACK (gimp_color_button_get_color),
+                    &grid_cfg.hcolor);
+  g_signal_connect (hcolor_button, "color-changed",
+                    G_CALLBACK (color_callback),
+                    chain_button);
+  g_signal_connect_swapped (hcolor_button, "color-changed",
+                            G_CALLBACK (gimp_preview_invalidate),
+                            preview);
+
+  vcolor_button = gimp_color_button_new (_("Vertical Color"),
+                                         COLOR_BUTTON_WIDTH, 16,
+                                         &grid_cfg.vcolor,
+                                         GIMP_COLOR_AREA_SMALL_CHECKS);
+  gimp_color_button_set_update (GIMP_COLOR_BUTTON (vcolor_button), TRUE);
+  gtk_table_attach_defaults (GTK_TABLE (table), vcolor_button, 1, 2, 1, 2);
+  gtk_widget_show (vcolor_button);
+
+  gimp_color_button_set_color_config (GIMP_COLOR_BUTTON (vcolor_button),
+                                      config);
+
+  g_signal_connect (vcolor_button, "color-changed",
+                    G_CALLBACK (gimp_color_button_get_color),
+                    &grid_cfg.vcolor);
+  g_signal_connect (vcolor_button, "color-changed",
+                    G_CALLBACK (color_callback),
+                    chain_button);
+  g_signal_connect_swapped (vcolor_button, "color-changed",
+                            G_CALLBACK (gimp_preview_invalidate),
+                            preview);
+
+  button = gimp_color_button_new (_("Intersection Color"),
+                                  COLOR_BUTTON_WIDTH, 16,
+                                  &grid_cfg.icolor,
+                                  GIMP_COLOR_AREA_SMALL_CHECKS);
+  gimp_color_button_set_update (GIMP_COLOR_BUTTON (button), TRUE);
+  gtk_table_attach_defaults (GTK_TABLE (table), button, 2, 3, 1, 2);
+  gtk_widget_show (button);
+
+  gimp_color_button_set_color_config (GIMP_COLOR_BUTTON (button),
+                                      config);
+  g_object_unref (config);
+
+  g_signal_connect (button, "color-changed",
+                    G_CALLBACK (gimp_color_button_get_color),
+                    &grid_cfg.icolor);
+  g_signal_connect_swapped (button, "color-changed",
+                            G_CALLBACK (gimp_preview_invalidate),
+                            preview);
+
+  gtk_widget_show (table);
+
+  gtk_widget_show (dlg);
+
+  g_object_set_data (G_OBJECT (dlg), "width",  width);
+  g_object_set_data (G_OBJECT (dlg), "space",  space);
+  g_object_set_data (G_OBJECT (dlg), "offset", offset);
+
+  run = (gimp_dialog_run (GIMP_DIALOG (dlg)) == GTK_RESPONSE_OK);
+
+  if (run)
+    update_values ();
+
+  gtk_widget_destroy (dlg);
+
+  return run;
+}
+