Adding upstream version 2.10.22.upstream/2.10.22upstream

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

1 files changed, 2492 insertions, 0 deletions

diff --git a/plug-ins/common/file-xmc.c b/plug-ins/common/file-xmc.c
new file mode 100644
index 0000000..a5c41f7
--- /dev/null
+++ b/plug-ins/common/file-xmc.c
@@ -0,0 +1,2492 @@
+/*
+ *   X11 Mouse Cursor (XMC) plug-in for GIMP
+ *
+ *   Copyright 2008-2009 Takeshi Matsuyama <tksmashiw@gmail.com>
+ *
+ *   Special thanks: Alexia Death, Sven Neumann, Martin Nordholts
+ *                   and all community members.
+ */
+
+/*
+ *   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/>.
+ */
+
+/*
+ * Todo: if drawable->bpp != 4 in save_image for GIMP-2.8?
+ * Todo: support for "gimp-metadata" parasite.
+ *       "xmc-copyright" and "xmc-license" may be deprecated in future?
+ */
+
+/*
+ * This plug-in use these four parasites.
+ * "hot-spot"       common with file-xbm plug-in
+ * "xmc-copyright"  original, store contents of type1 comment chunk of Xcursor
+ * "xmc-license"    original, store contents of type2 comment chunk of Xcursor
+ * "gimp-comment"   common, store contents of type3 comment chunk of Xcursor
+ */
+
+/* *** Caution: Size vs Dimension ***
+ *
+ * In this file, "size" and "dimension" are used in definitely
+ * different contexts.  "Size" means nominal size of Xcursor which is
+ * used to determine which frame depends on which animation sequence
+ * and which sequence is really used. (for more detail, please read
+ * Xcursor(3).)  On the other hand, "Dimension" simply means width
+ * and/or height.
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+#include <glib/gstdio.h>
+#include <glib/gprintf.h>
+
+#include <libgimp/gimp.h>
+#include <libgimp/gimpui.h>
+
+#include <X11/Xlib.h>
+#include <X11/Xcursor/Xcursor.h>
+
+#include "libgimp/stdplugins-intl.h"
+
+/* For debug */
+/* #define XMC_DEBUG */
+#ifdef XMC_DEBUG
+#  define DM_XMC(...) g_fprintf(stderr, __VA_ARGS__)
+#else
+#  define DM_XMC(...)
+#endif
+
+/*
+ * Constants...
+ */
+
+#define LOAD_PROC              "file-xmc-load"
+#define LOAD_THUMB_PROC        "file-xmc-load-thumb"
+#define SAVE_PROC              "file-xmc-save"
+
+#define PLUG_IN_BINARY         "file-xmc"
+#define PLUG_IN_ROLE           "gimp-file-xmc"
+
+/* We use "xmc" as the file extension of X cursor for convenience */
+#define XCURSOR_EXTENSION      "xmc"
+#define XCURSOR_MIME_TYPE      "image/x-xcursor"
+
+/* The maximum dimension of Xcursor which is fully supported in any
+ * environments. This is defined on line 59 of xcursorint.h in
+ * libXcursor source code. Make sure this is about dimensions (width
+ * and height) not about nominal size despite of it's name.
+ *
+ * As of 2018, this macro still exists in libXCursor codebase, but I am
+ * unsure how far this restriction is enforced since this is a very low
+ * max dimension for today's displays. Therefore our code will not
+ * enforce this value anymore, but only warn about possible
+ * incompatibilities when using higher values.
+ */
+#define MAX_BITMAP_CURSOR_SIZE  64
+
+/* The maximum dimension of each frame of X cursor we want to save
+ * should be MAX_BITMAP_CURSOR_SIZE but about loading, xhot(& yhot) of
+ * each frame varies from 0 to MAX_BITMAP_CURSOR_SIZE-1, so we need to
+ * set the maximum dimension of image no less than
+ * MAX_BITMAP_CURSOR_SIZE * 2( -1 to be precise) to remain hotspots on
+ * the same coordinates.
+ *
+ * We use four times value (256 for saving, 512 for loading) as a
+ * limitation because some cursors generated by CursorXP/FX to X11
+ * Mouse Theme Converter is very large.
+ *
+ * The biggest cursor I found is "watch" of OuterLimits which size is
+ * 213x208.  If you found bigger one, please tell me ;-)
+ */
+#define MAX_LOAD_DIMENSION      512
+#define MAX_SAVE_DIMENSION      256
+
+/* The maximum number of different nominal sizes in one cursor this
+ * plug-in can treat. This is based on the number of cursor size which
+ * gnome-appearance-properties supports.(12,16,24,32,36,40,48,64)
+ * ref. capplets/common/gnome-theme-info.c in source of
+ * gnome-control-center
+ */
+#define MAX_SIZE_NUM            8
+
+/* cursor delay is guint32 defined in Xcursor.h */
+#define CURSOR_MAX_DELAY        100000000
+#define CURSOR_DEFAULT_DELAY    50
+#define CURSOR_MINIMUM_DELAY    5
+
+#define div_255(x)       (((x) + 0x80 + (((x) + 0x80) >> 8)) >> 8)
+#define READ32(f, e)     read32 ((f), (e)); if (*(e)) return -1;
+#define DISPLAY_DIGIT(x) ((x) > 100) ? 3 : ((x) > 10) ? 2 : 1
+
+/*
+ * Structures...
+ */
+
+typedef struct
+{
+  gboolean    crop;
+  gint        size;
+  gboolean    size_replace;
+  gint32      delay;
+  gboolean    delay_replace;
+} XmcSaveVals;
+
+/*
+ * Local functions...
+ */
+
+static void      query                     (void);
+
+static void      run                       (const gchar      *name,
+                                            gint              nparams,
+                                            const GimpParam  *param,
+                                            gint             *nreturn_vals,
+                                            GimpParam       **return_vals);
+
+static gint32    load_image                (const gchar      *filename,
+                                            GError          **error);
+
+static gint32    load_thumbnail            (const gchar      *filename,
+                                            gint32            thumb_size,
+                                            gint32           *width,
+                                            gint32           *height,
+                                            gint32           *num_layers,
+                                            GError          **error);
+
+static guint32   read32                    (FILE             *f,
+                                            GError          **error);
+
+static gboolean  save_image                (const gchar      *filename,
+                                            gint32            image_ID,
+                                            gint32            drawable_ID,
+                                            gint32            orig_image_ID,
+                                            GError          **error);
+
+static gboolean  save_dialog               (const gint32      image_ID,
+                                            GeglRectangle    *hotspotRange);
+
+static void      comment_entry_callback    (GtkWidget        *widget,
+                                            gchar           **commentp);
+
+static void      text_view_callback        (GtkTextBuffer    *buffer,
+                                            gchar           **commentp);
+
+static gboolean  load_default_hotspot      (const gint32      image_ID,
+                                            GeglRectangle    *hotspotRange);
+
+static inline guint32   separate_alpha     (guint32           pixel);
+
+static inline guint32   premultiply_alpha  (guint32           pixel);
+
+static XcursorComments *set_cursor_comments (void);
+
+static void      load_comments             (const gint32      image_ID);
+
+static gboolean  set_comment_to_pname      (const gint32      image_ID,
+                                            const gchar      *content,
+                                            const gchar      *pname);
+
+static gchar    *get_comment_from_pname    (const gint32      image_ID,
+                                            const gchar       *pname);
+
+static gboolean  set_hotspot_to_parasite   (gint32            image_ID);
+
+static gboolean  get_hotspot_from_parasite (gint32            image_ID);
+
+static void      set_size_and_delay        (const gchar       *framename,
+                                            guint32           *sizep,
+                                            guint32           *delayp,
+                                            GRegex            *re,
+                                            gboolean          *size_warnp);
+
+static gchar    *make_framename            (guint32            size,
+                                            guint32            delay,
+                                            guint              indent,
+                                            GError           **errorp);
+
+static void      get_cropped_region        (GeglRectangle     *retrun_rgn,
+                                            GeglBuffer        *buffer);
+
+static inline gboolean pix_is_opaque       (guint32            pix);
+
+static GeglRectangle * get_intersection_of_frames (gint32      image_ID);
+
+static gboolean   pix_in_region            (gint32             x,
+                                            gint32             y,
+                                            GeglRectangle     *xmcrp);
+
+static void find_hotspots_and_dimensions   (XcursorImages     *xcIs,
+                                            gint32            *xhot,
+                                            gint32            *yhot,
+                                            gint32            *width,
+                                            gint32            *height);
+
+/*
+ * Globals...
+ */
+
+const GimpPlugInInfo PLUG_IN_INFO =
+{
+  NULL,
+  NULL,
+  query,
+  run
+};
+
+static XmcSaveVals xmcvals =
+{
+  /* saved in pdb after this plug-in's process has gone. */
+  FALSE,                /* crop */
+  32,                   /* size */
+  FALSE,                /* size_replace */
+  CURSOR_DEFAULT_DELAY, /* delay */
+  FALSE                 /* delay_replace */
+};
+
+static struct
+{
+  /* saved as parasites of original image after this plug-in's process has gone.*/
+  gint32 x;                    /* hotspot x */
+  gint32 y;                    /* hotspot y */
+  gchar *comments[3]; /* copyright, license, other */
+} xmcparas = {0,};
+
+/* parasites correspond to XcursorComment type */
+static const gchar *parasiteName[3] = { "xmc-copyright",
+                                        "xmc-license",
+                                        "gimp-comment" };
+
+/*
+ * 'main()' - Main entry - just call gimp_main()...
+ */
+
+MAIN ()
+
+
+/*
+ * 'query()' - Respond to a plug-in query...
+ */
+
+static void
+query (void)
+{
+  static const GimpParamDef load_args[] =
+    {
+      { GIMP_PDB_INT32,  "run-mode",     "The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }" },
+      { GIMP_PDB_STRING, "filename",     "The name of the file to load" },
+      { GIMP_PDB_STRING, "raw-filename", "The name of the file to load" }
+    };
+  static const GimpParamDef load_return_vals[] =
+    {
+      { GIMP_PDB_IMAGE, "image", "Output image" }
+    };
+
+  static const GimpParamDef thumb_args[] =
+    {
+      { GIMP_PDB_STRING, "filename",     "The name of the file to load" },
+      { GIMP_PDB_INT32,  "thumb-size",   "Preferred thumbnail size"     }
+    };
+  static const GimpParamDef thumb_return_vals[] =
+    {
+      { GIMP_PDB_IMAGE,   "image",            "Thumbnail image"        },
+      { GIMP_PDB_INT32,   "image-width",      "The width of image"     },
+      { GIMP_PDB_INT32,   "image-height",     "The height of image"    },
+      { GIMP_PDB_INT32,   "image-type",       "The color type of image"},
+      { GIMP_PDB_INT32,   "image-num-layers", "The number of layeres"  }
+    };
+
+  static const GimpParamDef save_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",     "Drawable to export"           },
+      { GIMP_PDB_STRING,   "filename",     "The name of the file to export the image in" },
+      { GIMP_PDB_STRING,   "raw-filename", "The name entered" },
+      /* following elements are XMC specific options */
+      { GIMP_PDB_INT32,    "x_hot",        "X-coordinate of hot spot"       },
+      { GIMP_PDB_INT32,    "y_hot",        "Y-coordinate of hot spot\n"
+                                           "Use (-1, -1) to keep original hot spot."},
+      { GIMP_PDB_INT32,    "crop",         "Auto-crop or not"              },
+      { GIMP_PDB_INT32,    "size",         "Default nominal size"          },
+      { GIMP_PDB_INT32,    "size_replace", "Replace existent size or not." },
+      { GIMP_PDB_INT32,    "delay",        "Default delay"                 },
+      { GIMP_PDB_INT32,    "delay_replace","Replace existent delay or not."},
+      { GIMP_PDB_STRING,   "copyright",    "Copyright information."        },
+      { GIMP_PDB_STRING,   "license",      "License information."          },
+      { GIMP_PDB_STRING,   "other",        "Other comment.(taken from "
+                                           "\"gimp-comment\" parasite)"    }
+    };
+
+  gimp_install_procedure (LOAD_PROC,
+                          "Loads files of X11 Mouse Cursor file format",
+                          "This plug-in loads X11 Mouse Cursor (XMC) files.",
+                          "Takeshi Matsuyama <tksmashiw@gmail.com>",
+                          "Takeshi Matsuyama",
+                          "26 May 2009",
+                          N_("X11 Mouse Cursor"),
+                          NULL,
+                          GIMP_PLUGIN,
+                          G_N_ELEMENTS (load_args),
+                          G_N_ELEMENTS (load_return_vals),
+                          load_args,
+                          load_return_vals);
+
+  gimp_register_file_handler_mime (LOAD_PROC, XCURSOR_MIME_TYPE);
+  gimp_register_magic_load_handler (LOAD_PROC,
+                                    XCURSOR_EXTENSION,
+                                    "",
+                                    "0,string,Xcur");
+
+  gimp_install_procedure (LOAD_THUMB_PROC,
+                          "Loads only first frame of X11 Mouse Cursor's "
+                          "animation sequence which nominal size is the closest "
+                          "of thumb-size to be used as a thumbnail",
+                          "",
+                          "Takeshi Matsuyama <tksmashiw@gmail.com>",
+                          "Takeshi Matsuyama",
+                          "26 May 2009",
+                          NULL,
+                          NULL,
+                          GIMP_PLUGIN,
+                          G_N_ELEMENTS (thumb_args),
+                          G_N_ELEMENTS (thumb_return_vals),
+                          thumb_args,
+                          thumb_return_vals);
+
+  gimp_register_thumbnail_loader (LOAD_PROC, LOAD_THUMB_PROC);
+
+  gimp_install_procedure (SAVE_PROC,
+                          "Exports files of X11 cursor file",
+                          "This plug-in exports X11 Mouse Cursor (XMC) files",
+                          "Takeshi Matsuyama <tksmashiw@gmail.com>",
+                          "Takeshi Matsuyama",
+                          "26 May 2009",
+                          N_("X11 Mouse Cursor"),
+                          "RGBA",
+                          GIMP_PLUGIN,
+                          G_N_ELEMENTS (save_args), 0,
+                          save_args, NULL);
+
+  gimp_register_file_handler_mime (SAVE_PROC, XCURSOR_MIME_TYPE);
+  gimp_register_save_handler (SAVE_PROC, XCURSOR_EXTENSION, "");
+}
+
+/*
+ * 'run()' - Run the plug-in...
+ */
+
+static void
+run (const gchar      *name,
+     gint              nparams,
+     const GimpParam  *param,
+     gint             *nreturn_vals,
+     GimpParam       **return_vals)
+{
+  static GimpParam  values[6];
+  GimpRunMode       run_mode;
+  GimpPDBStatusType status = GIMP_PDB_SUCCESS;
+  gint32            image_ID;
+  gint32            drawable_ID;
+  gint32            orig_image_ID;
+  GimpExportReturn  export = GIMP_EXPORT_CANCEL;
+  GeglRectangle    *hotspotRange = NULL;
+  gint32            width, height;
+  gint32            num_layers;
+  GError           *error = NULL;
+  gint              i;
+
+  INIT_I18N ();
+  gegl_init (NULL, NULL);
+
+  DM_XMC ("run: start.\n");
+  *nreturn_vals = 1;
+  *return_vals  = values;
+
+  values[0].type          = GIMP_PDB_STATUS;
+  values[0].data.d_status = GIMP_PDB_EXECUTION_ERROR;
+
+  if (strcmp (name, LOAD_PROC) == 0)
+    {
+      DM_XMC ("Starting to load file.\tparam.data=%s\n",
+              param[1].data.d_string);
+      image_ID = load_image (param[1].data.d_string, &error);
+
+      if (image_ID != -1)
+        {
+          *nreturn_vals = 2;
+          values[1].type = GIMP_PDB_IMAGE;
+          values[1].data.d_image = image_ID;
+          DM_XMC ("LOAD_PROC successfully load image. image_ID=%i\n", image_ID);
+        }
+      else
+        {
+          status = GIMP_PDB_EXECUTION_ERROR;
+        }
+    }
+  else if (strcmp (name, LOAD_THUMB_PROC) == 0)
+    {
+      DM_XMC ("Starting to load thumbnail.\tfilename=%s\tthumb-size=%d\n",
+              param[0].data.d_string, param[1].data.d_int32);
+      image_ID = load_thumbnail (param[0].data.d_string,
+                                 param[1].data.d_int32,
+                                 &width,
+                                 &height,
+                                 &num_layers,
+                                 &error);
+
+      if (image_ID != -1)
+        {
+          *nreturn_vals = 6;
+          values[1].type = GIMP_PDB_IMAGE;
+          values[1].data.d_image = image_ID;
+          values[2].type = GIMP_PDB_INT32;
+          values[2].data.d_int32 = width;            /* width */
+          values[3].type = GIMP_PDB_INT32;
+          values[3].data.d_int32 = height;           /* height */
+          /* This will not work on GIMP 2.6, but not harmful. */
+          values[4].type = GIMP_PDB_INT32;
+          values[4].data.d_int32 = GIMP_RGBA_IMAGE;  /* type */
+          values[5].type = GIMP_PDB_INT32;
+          values[5].data.d_int32 = num_layers;       /* num_layers */
+
+          DM_XMC ("LOAD_THUMB_PROC successfully load image. image_ID=%i\n", image_ID);
+        }
+      else
+        {
+          status = GIMP_PDB_EXECUTION_ERROR;
+        }
+    }
+  else if (strcmp (name, SAVE_PROC) == 0)
+    {
+      DM_XMC ("run: export %s\n", name);
+      run_mode    = param[0].data.d_int32;
+      image_ID    = orig_image_ID = param[1].data.d_int32;
+      drawable_ID = param[2].data.d_int32;
+      hotspotRange = get_intersection_of_frames (image_ID);
+
+      if (! hotspotRange)
+        {
+          g_set_error (&error, 0, 0,
+                       _("Cannot set the hot spot!\n"
+                         "You must arrange layers so that all of them have an intersection."));
+          *nreturn_vals = 2;
+          values[1].type          = GIMP_PDB_STRING;
+          values[1].data.d_string = error->message;
+          values[0].data.d_status = GIMP_PDB_EXECUTION_ERROR;
+
+          return;
+        }
+
+      /*  eventually export the image */
+      switch (run_mode)
+        {
+        case GIMP_RUN_INTERACTIVE:
+        case GIMP_RUN_WITH_LAST_VALS:
+          gimp_ui_init (PLUG_IN_BINARY, FALSE);
+
+          export = gimp_export_image (&image_ID, &drawable_ID, "XMC",
+                                      GIMP_EXPORT_CAN_HANDLE_RGB    |
+                                      GIMP_EXPORT_CAN_HANDLE_ALPHA  |
+                                      GIMP_EXPORT_CAN_HANDLE_LAYERS |
+                                      GIMP_EXPORT_NEEDS_ALPHA);
+
+          if (export == GIMP_EXPORT_CANCEL)
+            {
+              *nreturn_vals = 1;
+              values[0].data.d_status = GIMP_PDB_CANCEL;
+
+              return;
+            }
+          break;
+
+        default:
+          break;
+        }
+      switch (run_mode)
+        {
+        case GIMP_RUN_INTERACTIVE:
+          /*
+           * Possibly retrieve data...
+           */
+          gimp_get_data (SAVE_PROC, &xmcvals);
+          load_comments (image_ID);
+
+          load_default_hotspot (image_ID, hotspotRange);
+
+          if (! save_dialog (image_ID, hotspotRange))
+              status = GIMP_PDB_CANCEL;
+          break;
+
+        case GIMP_RUN_NONINTERACTIVE:
+          /*
+           * Make sure all the arguments are there!
+           */
+          if (nparams != 15)
+            {
+              status = GIMP_PDB_CALLING_ERROR;
+            }
+          else
+            {
+              if (pix_in_region (param[5].data.d_int32, param[6].data.d_int32,
+                                 hotspotRange))
+                { /* if passed hotspot is acceptable, use that ones. */
+                  xmcparas.x = param[5].data.d_int32;
+                  xmcparas.y = param[6].data.d_int32;
+                }
+              else
+                {
+                  load_default_hotspot (image_ID, hotspotRange);
+                  /* you can purposely choose non acceptable values for hotspot
+                     to use cursor's original values. */
+                }
+              xmcvals.crop          = param[7].data.d_int32;
+              xmcvals.size          = param[8].data.d_int32;
+              xmcvals.size_replace  = param[9].data.d_int32;
+              /* load delay */
+              if (param[10].data.d_int32 < CURSOR_MINIMUM_DELAY)
+                {
+                  xmcvals.delay = CURSOR_DEFAULT_DELAY;
+                }
+              else
+                {
+                  xmcvals.delay = param[10].data.d_int32;
+                }
+              xmcvals.delay_replace = param[11].data.d_int32;
+              load_comments (image_ID);
+              for (i = 0; i < 3; ++i)
+                {
+                  if (param[i + 12].data.d_string &&
+                      g_utf8_validate (param[i + 12].data.d_string, -1, NULL))
+                    {
+                      xmcparas.comments[i] = g_strdup (param[i + 12].data.d_string);
+                    }
+                }
+            }
+          break;
+
+        case GIMP_RUN_WITH_LAST_VALS:
+          /* Possibly retrieve data... */
+          gimp_get_data (SAVE_PROC, &xmcvals);
+          load_comments (image_ID);
+          load_default_hotspot (image_ID, hotspotRange);
+          break;
+
+        default:
+          break;
+        }
+      if (status == GIMP_PDB_SUCCESS)
+        {
+          if (save_image (param[3].data.d_string, image_ID,
+                          drawable_ID, orig_image_ID, &error))
+            {
+              gimp_set_data (SAVE_PROC, &xmcvals, sizeof (XmcSaveVals));
+            }
+          else
+            {
+              status = GIMP_PDB_EXECUTION_ERROR;
+            }
+        }
+
+      if (export == GIMP_EXPORT_EXPORT)
+        gimp_image_delete (image_ID);
+
+      g_free (hotspotRange);
+
+      for (i = 0; i < 3 ; ++i)
+        {
+          g_free (xmcparas.comments[i]);
+          xmcparas.comments[i] = NULL;
+        }
+    }
+  else
+    {
+      DM_XMC ("name=%s\n", name);
+      status = GIMP_PDB_CALLING_ERROR;
+    }
+
+   if (status != GIMP_PDB_SUCCESS && error)
+     {
+       *nreturn_vals = 2;
+       values[1].type          = GIMP_PDB_STRING;
+       values[1].data.d_string = error->message;
+     }
+
+  values[0].data.d_status = status;
+  DM_XMC ("run: finish\n");
+}
+
+
+/*
+ * 'load_image()' - Load a X cursor image into a new image window.
+ */
+
+static gint32
+load_image (const gchar  *filename,
+            GError      **error)
+{
+  FILE            *fp;
+  gint32           image_ID;
+  gint32           layer_ID;
+  GeglBuffer      *buffer;
+  XcursorComments *commentsp; /* pointer to comments */
+  XcursorImages   *imagesp;   /* pointer to images*/
+  guint32          delay;     /* use guint32 instead CARD32(in X11/Xmd.h) */
+  gchar           *framename; /* name of layer */
+  guint32         *tmppixel;  /* pixel data (guchar * bpp = guint32) */
+  gint             img_width;
+  gint             img_height;
+  gint             i, j;
+
+  gimp_progress_init_printf (_("Opening '%s'"),
+                             gimp_filename_to_utf8 (filename));
+
+  /* Open the file and check it is a valid X cursor */
+
+  fp = g_fopen (filename, "rb");
+
+  if (fp == NULL)
+    {
+      g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno),
+                   _("Could not open '%s' for reading: %s"),
+                   gimp_filename_to_utf8 (filename), g_strerror (errno));
+      return -1;
+    }
+
+  if (! XcursorFileLoad (fp, &commentsp, &imagesp))
+    {
+      g_set_error (error, 0, 0, _("'%s' is not a valid X cursor."),
+                   gimp_filename_to_utf8 (filename));
+      fclose (fp);
+      return -1;
+    }
+
+  /* check dimension is valid. */
+
+  for (i = 0; i < imagesp->nimage; i++)
+    {
+      if (imagesp->images[i]->width > MAX_LOAD_DIMENSION)
+        {
+          g_set_error (error, 0, 0,
+                       _("Frame %d of '%s' is too wide for an X cursor."),
+                       i + 1, gimp_filename_to_utf8 (filename));
+          fclose (fp);
+          return -1;
+        }
+      if (imagesp->images[i]->height > MAX_LOAD_DIMENSION)
+        {
+          g_set_error (error, 0, 0,
+                       _("Frame %d of '%s' is too high for an X cursor."),
+                       i + 1, gimp_filename_to_utf8 (filename));
+          fclose (fp);
+          return -1;
+        }
+    }
+
+  find_hotspots_and_dimensions (imagesp,
+                                &xmcparas.x, &xmcparas.y,
+                                &img_width, &img_height);
+
+  DM_XMC ("xhot=%i,\tyhot=%i,\timg_width=%i,\timg_height=%i\n",
+          xmcparas.x, xmcparas.y, img_width, img_height);
+
+  image_ID = gimp_image_new (img_width, img_height, GIMP_RGB);
+
+  gimp_image_set_filename (image_ID, filename);
+
+  if (! set_hotspot_to_parasite (image_ID))
+    {
+      fclose (fp);
+      return -1;
+    }
+
+  /* Temporary buffer */
+  tmppixel = g_new (guint32, img_width * img_height);
+
+  /* load each frame to each layer one by one */
+  for (i = 0; i < imagesp->nimage; i++)
+    {
+      gint width  = imagesp->images[i]->width;
+      gint height = imagesp->images[i]->height;
+
+      delay = imagesp->images[i]->delay;
+
+      if (delay < CURSOR_MINIMUM_DELAY)
+        {
+          delay = CURSOR_DEFAULT_DELAY;
+        }
+
+      DM_XMC ("images[%i]->delay=%i\twidth=%d\theight=%d\n",
+              i ,delay, imagesp->images[i]->width, imagesp->images[i]->height);
+
+      framename = make_framename (imagesp->images[i]->size, delay,
+                                  DISPLAY_DIGIT (imagesp->nimage), error);
+      if (! framename)
+        {
+          fclose (fp);
+          return -1;
+        }
+
+      layer_ID = gimp_layer_new (image_ID, framename, width, height,
+                                 GIMP_RGBA_IMAGE,
+                                 100,
+                                 gimp_image_get_default_new_layer_mode (image_ID));
+      gimp_image_insert_layer (image_ID, layer_ID, -1, 0);
+
+      /* Adjust layer position to let hotspot sit on the same point. */
+      gimp_item_transform_translate (layer_ID,
+                                     xmcparas.x - imagesp->images[i]->xhot,
+                                     xmcparas.y - imagesp->images[i]->yhot);
+
+      g_free (framename);
+
+      /* Get the buffer for our load... */
+
+      buffer = gimp_drawable_get_buffer (layer_ID);
+
+      /* set color to each pixel */
+      for (j = 0; j < width * height; j++)
+        {
+          tmppixel[j] = separate_alpha (imagesp->images[i]->pixels[j]);
+        }
+
+      /* set pixel */
+      gegl_buffer_set (buffer, GEGL_RECTANGLE (0, 0, width, height), 0,
+                       NULL, tmppixel, GEGL_AUTO_ROWSTRIDE);
+
+      gimp_progress_update ((i + 1) / imagesp->nimage);
+
+      g_object_unref (buffer);
+    }
+
+  g_free (tmppixel);
+
+  gimp_progress_update (1.0);
+
+  /* Comment parsing */
+
+  if (commentsp)
+    {
+      for (i = 0; i < commentsp->ncomment; ++i)
+        {
+          DM_XMC ("comment type=%d\tcomment=%s\n",
+                  commentsp->comments[i]->comment_type,
+                  commentsp->comments[i]->comment);
+          if (! set_comment_to_pname (image_ID,
+                                      commentsp->comments[i]->comment,
+                                      parasiteName[commentsp->comments[i]->comment_type -1]))
+            {
+              DM_XMC ("Failed to write %ith comment.\n", i);
+              fclose (fp);
+              return -1;
+            }
+        }
+    }
+
+  DM_XMC ("Comment parsing done.\n");
+  XcursorImagesDestroy (imagesp);
+  XcursorCommentsDestroy (commentsp);
+  fclose (fp);
+
+  gimp_progress_end ();
+
+  return image_ID;
+}
+
+/*
+ * load_thumbnail
+ */
+
+static gint32
+load_thumbnail (const gchar *filename,
+                gint32       thumb_size,
+                gint32      *thumb_width,
+                gint32      *thumb_height,
+                gint32      *thumb_num_layers,
+                GError     **error)
+{
+  /* Return only one frame for thumbnail.
+   * We select first frame of an animation sequence which nominal size is the
+   * closest of thumb_size.
+   */
+
+  XcursorImages *xcIs = NULL;  /* use to find the dimensions of thumbnail */
+  XcursorImage  *xcI;          /* temporary pointer to XcursorImage */
+  guint32       *positions;    /* array of the offsets of image chunks */
+  guint32        size;         /* nominal size */
+  guint32        diff;         /* difference between thumb_size and current size */
+  guint32        min_diff = XCURSOR_IMAGE_MAX_SIZE; /* minimum value of diff */
+  guint32        type;         /* chunk type */
+  FILE          *fp = NULL;
+  gint32         image_ID = -1;
+  gint32         layer_ID;
+  GeglBuffer    *buffer;
+  guint32       *tmppixel;     /* pixel data (guchar * bpp = guint32) */
+  guint32        ntoc = 0;     /* the number of table of contents */
+  gint           sel_num = -1; /* the index of selected image chunk */
+  gint           width;
+  gint           height;
+  gint           i;
+
+  g_return_val_if_fail (thumb_width, -1);
+  g_return_val_if_fail (thumb_height, -1);
+  g_return_val_if_fail (thumb_num_layers, -1);
+
+  *thumb_width      = 0;
+  *thumb_height     = 0;
+  *thumb_num_layers = 0;
+
+  fp = g_fopen (filename, "rb");
+
+  if (fp == NULL)
+    {
+      g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno),
+                   _("Could not open '%s' for reading: %s"),
+                   gimp_filename_to_utf8 (filename), g_strerror (errno));
+      return -1;
+    }
+
+  /* From this line, we make a XcursorImages struct so that we can find out the
+   * width and height of entire image.
+   * We can use XcursorFileLoadImages (fp, thumb_size) from libXcursor instead
+   * of this ugly code but XcursorFileLoadImages loads all pixel data of the
+   * image chunks on memory thus we should not use it.
+   */
+
+  /* find which image chunk is preferred to load. */
+
+  /* skip magic, headersize, version */
+  fseek (fp, 12, SEEK_SET);
+  /* read the number of chunks */
+  ntoc = READ32 (fp, error)
+  if (ntoc > (G_MAXUINT32 / sizeof (guint32)))
+    {
+      g_set_error (error, 0, 0,
+                   "'%s' seems to have an incorrect toc size.",
+                   gimp_filename_to_utf8 (filename));
+      fclose (fp);
+      return -1;
+    }
+  positions = g_malloc (ntoc * sizeof (guint32));
+
+  /* enter list of toc(table of contents) */
+  for (; ntoc > 0; --ntoc)
+    {
+      /* read entry type */
+      type = READ32 (fp, error)
+      if (type != XCURSOR_IMAGE_TYPE)
+        {
+          /* not a image */
+
+          /* skip rest of this content */
+          fseek (fp, 8, SEEK_CUR);
+        }
+      else
+        {
+          /* this content is image */
+
+          size = READ32 (fp, error)
+          positions[*thumb_num_layers] = READ32 (fp, error)
+          /* is this image is more preferred than selected before? */
+          diff = MAX (thumb_size, size) - MIN (thumb_size, size);
+          if (diff < min_diff)
+            {/* the image size is closer than current selected image */
+              min_diff = diff;
+              sel_num = *thumb_num_layers;
+            }
+          ++*thumb_num_layers;
+        }
+    }
+
+  if (sel_num < 0)
+    {
+      g_set_error (error, 0, 0,
+                   _("there is no image chunk in \"%s\"."),
+                   gimp_filename_to_utf8 (filename));
+      fclose (fp);
+      return -1;
+    }
+
+  /* get width and height of entire image */
+
+  /* Let's make XcursorImages */
+  xcIs = XcursorImagesCreate (*thumb_num_layers);
+  xcIs->nimage = *thumb_num_layers;
+  for (i = 0; i < xcIs->nimage; ++i)
+    {
+      /* make XcursorImage with no pixel buffer */
+      xcI = XcursorImageCreate (0, 0);
+      /* go to the image chunk header */
+      fseek (fp, positions[i], SEEK_SET);
+      /* skip chunk header */
+      fseek (fp, 16, SEEK_CUR);
+      /* read properties of this image to determine entire image dimensions */
+      xcI->width = READ32 (fp, error)
+      xcI->height = READ32 (fp, error)
+      xcI->xhot = READ32 (fp, error)
+      xcI->yhot = READ32 (fp, error)
+
+      xcIs->images[i] = xcI;
+    }
+
+  DM_XMC ("selected size is %i or %i\n",
+          thumb_size - min_diff, thumb_size + min_diff);
+
+  /* get entire image dimensions */
+  find_hotspots_and_dimensions (xcIs, NULL, NULL, thumb_width, thumb_height);
+
+  DM_XMC ("width=%i\theight=%i\tnum-layers=%i\n",
+          *thumb_width, *thumb_height, xcIs->nimage);
+
+  /* dimension check */
+  if (*thumb_width > MAX_LOAD_DIMENSION)
+    {
+      g_set_error (error, 0, 0,
+                   _("'%s' is too wide for an X cursor."),
+                   gimp_filename_to_utf8 (filename));
+      fclose (fp);
+      return -1;
+    }
+
+  if (*thumb_height > MAX_LOAD_DIMENSION)
+    {
+      g_set_error (error, 0, 0,
+                   _("'%s' is too high for an X cursor."),
+                   gimp_filename_to_utf8 (filename));
+      fclose (fp);
+      return -1;
+    }
+
+  /*  create new image! */
+
+  width  = xcIs->images[sel_num]->width;
+  height = xcIs->images[sel_num]->height;
+
+  image_ID = gimp_image_new (width, height, GIMP_RGB);
+
+  layer_ID = gimp_layer_new (image_ID, NULL, width, height,
+                             GIMP_RGBA_IMAGE,
+                             100,
+                             gimp_image_get_default_new_layer_mode (image_ID));
+
+  gimp_image_insert_layer (image_ID, layer_ID, -1, 0);
+
+  /*
+   * Get the drawable and set the pixel region for our load...
+   */
+
+  buffer = gimp_drawable_get_buffer (layer_ID);
+
+  /* Temporary buffer */
+  tmppixel = g_new (guint32, width * height);
+
+  /* copy the chunk data to tmppixel */
+  fseek (fp, positions[sel_num], SEEK_SET);
+  fseek (fp, 36, SEEK_CUR); /* skip chunk header(16bytes), xhot, yhot, width, height, delay */
+
+  for (i = 0; i < width * height; i++)
+    {
+      tmppixel[i] = READ32 (fp, error)
+      /* get back separate alpha */
+      tmppixel[i] = separate_alpha (tmppixel[i]);
+    }
+
+  /* set pixel */
+  gegl_buffer_set (buffer, GEGL_RECTANGLE (0, 0, width, height), 0,
+                   NULL, tmppixel, GEGL_AUTO_ROWSTRIDE);
+
+  /* free tmppixel */
+  g_free(tmppixel);
+  g_free (positions);
+  fclose (fp);
+
+  g_object_unref (buffer);
+
+  return image_ID;
+}
+
+/* read guint32 value from f despite of host's byte order. */
+static guint32
+read32 (FILE    *f,
+        GError **error)
+{
+  guchar  p[4];
+  guint32 ret;
+
+  if (fread (p, 1, 4, f) != 4)
+    {
+      g_set_error (error, 0, 0, _("A read error occurred."));
+      return 0;
+    }
+
+#if G_BYTE_ORDER == G_LITTLE_ENDIAN
+  ret = p[0] + (p[1]<<8) + (p[2]<<16) + (p[3]<<24);
+#elif G_BYTE_ORDER == G_BIG_ENDIAN
+  ret = p[3] + (p[2]<<8) + (p[1]<<16) + (p[0]<<24);
+#elif G_BYTE_ORDER == G_PDP_ENDIAN
+  ret = p[2] + (p[3]<<8) + (p[0]<<16) + (p[1]<<24);
+#else
+  g_return_val_if_rearched ();
+#endif
+
+  return ret;
+}
+
+/* 'save_dialog ()'
+ */
+static gboolean
+save_dialog (const gint32   image_ID,
+             GeglRectangle *hotspotRange)
+{
+  GtkWidget      *dialog;
+  GtkWidget      *frame;
+  GtkWidget      *table;
+  GtkWidget      *box;
+  GtkAdjustment  *adjustment;
+  GtkWidget      *alignment;
+  GtkWidget      *tmpwidget;
+  GtkWidget      *label;
+  GtkTextBuffer  *textbuffer;
+  GValue          val = G_VALUE_INIT;
+  gint            x1, x2, y1, y2;
+  gboolean        run;
+
+  g_value_init (&val, G_TYPE_DOUBLE);
+  dialog = gimp_export_dialog_new (_("X11 Mouse Cursor"),
+                                   PLUG_IN_BINARY, SAVE_PROC);
+
+  /*
+   * parameter settings
+   */
+  frame = gimp_frame_new (_("XMC Options"));
+  gtk_container_set_border_width (GTK_CONTAINER (frame), 12);
+  gtk_box_pack_start (GTK_BOX (gimp_export_dialog_get_content_area (dialog)),
+                      frame, TRUE, TRUE, 0);
+  gtk_widget_show (frame);
+
+  table = gtk_table_new (9, 3, FALSE);
+  gtk_widget_show (table);
+  gtk_table_set_col_spacings (GTK_TABLE (table), 6);
+  gtk_table_set_row_spacings (GTK_TABLE (table), 6);
+  gtk_container_set_border_width (GTK_CONTAINER (table), 12);
+  gtk_container_add (GTK_CONTAINER (frame), table);
+
+  /*
+   *  Hotspot
+   */
+  /* label "Hot spot  _X:" + spinbox */
+  x1 = hotspotRange->x;
+  x2 = hotspotRange->width + hotspotRange->x - 1;
+
+  adjustment = (GtkAdjustment *)
+    gtk_adjustment_new (xmcparas.x, x1, x2, 1, 5, 0);
+  tmpwidget = gimp_spin_button_new (adjustment, 1.0, 0);
+  gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (tmpwidget), TRUE);
+  g_value_set_double (&val, 1.0);
+  g_object_set_property (G_OBJECT (tmpwidget), "xalign", &val);/* align right*/
+  gimp_table_attach_aligned (GTK_TABLE (table), 0, 0,
+                             _("Hot spot _X:"), 0, 0.5, tmpwidget, 1, TRUE);
+  gtk_widget_show (tmpwidget);
+
+  g_signal_connect (adjustment, "value-changed",
+                    G_CALLBACK (gimp_int_adjustment_update),
+                    &xmcparas.x);
+
+  gimp_help_set_help_data (tmpwidget,
+                           _("Enter the X coordinate of the hot spot. "
+                             "The origin is top left corner."),
+                           NULL);
+
+  /* label "Y:" + spinbox */
+  y1 = hotspotRange->y;
+  y2 = hotspotRange->height + hotspotRange->y - 1;
+
+  adjustment = (GtkAdjustment *)
+    gtk_adjustment_new (xmcparas.y, y1, y2, 1, 5, 0);
+  tmpwidget = gimp_spin_button_new (adjustment, 1.0, 0);
+  gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (tmpwidget), TRUE);
+  g_value_set_double (&val, 1.0);
+  g_object_set_property (G_OBJECT (tmpwidget), "xalign", &val);/* align right*/
+  gimp_table_attach_aligned (GTK_TABLE (table), 1, 0,
+                             "_Y:", 1.0, 0.5, tmpwidget, 1, TRUE);
+  gtk_widget_show (tmpwidget);
+
+  g_signal_connect (adjustment, "value-changed",
+                    G_CALLBACK (gimp_int_adjustment_update),
+                    &xmcparas.y);
+
+  gimp_help_set_help_data (tmpwidget,
+                           _("Enter the Y coordinate of the hot spot. "
+                             "The origin is top left corner."),
+                           NULL);
+
+  /*
+   *  Auto-crop
+   */
+  /* check button */
+  tmpwidget =
+  gtk_check_button_new_with_mnemonic (_("_Auto-Crop all frames."));
+  gtk_table_attach (GTK_TABLE (table),
+                    tmpwidget, 0, 3, 1, 2, GTK_FILL, 0, 0, 10);
+  gtk_widget_show (tmpwidget);
+
+  gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (tmpwidget),
+                                xmcvals.crop);
+  gtk_widget_show (tmpwidget);
+  g_signal_connect (tmpwidget, "toggled",
+                    G_CALLBACK (gimp_toggle_button_update),
+                    &xmcvals.crop);
+  /* tooltip */
+  gimp_help_set_help_data (tmpwidget,
+                           _("Remove the empty borders of all frames.\n"
+                             "This reduces the file size and may fix "
+                             "the problem that some large cursors disorder "
+                             "the screen.\n"
+                             "Uncheck if you plan to edit the exported "
+                             "cursor using other programs."),
+                           NULL);
+
+  /*
+   *  size
+   */
+  tmpwidget =
+    gimp_int_combo_box_new ("12px", 12, "16px", 16,
+                            "24px", 24, "32px", 32,
+                            "36px", 36, "40px", 40,
+                            "48px", 48, "64px", 64, NULL);
+  gimp_int_combo_box_connect (GIMP_INT_COMBO_BOX (tmpwidget),
+                              32,
+                              G_CALLBACK (gimp_int_combo_box_get_active),
+                              &xmcvals.size);
+  gtk_widget_show (tmpwidget);
+  /* tooltip */
+  gimp_help_set_help_data (tmpwidget,
+                           _("Choose the nominal size of frames.\n"
+                             "If you don't have plans to make multi-sized "
+                             "cursor, or you have no idea, leave it \"32px\".\n"
+                             "Nominal size has no relation with the actual "
+                             "size (width or height).\n"
+                             "It is only used to determine which frame depends "
+                             "on which animation sequence, and which sequence "
+                             "is used based on the value of "
+                             "\"gtk-cursor-theme-size\"."),
+                           NULL);
+
+  gimp_table_attach_aligned (GTK_TABLE (table), 0, 2,
+                             _("_Size:"), 0, 0.5, tmpwidget, 3, TRUE);
+  /* Replace size ? */
+  tmpwidget =
+    gimp_int_radio_group_new (FALSE, NULL, G_CALLBACK (gimp_radio_button_update),
+                             &xmcvals.size_replace, xmcvals.size_replace,
+                             _("_Use this value only for a frame which size "
+                               "is not specified."),
+                             FALSE, NULL,
+                             _("_Replace the size of all frames even if it "
+                               "is specified."),
+                             TRUE,  NULL,
+                             NULL);
+  alignment = gtk_alignment_new (0.5, 0.5, 1.0, 1.0);
+  gtk_widget_show (alignment);
+  gtk_table_attach (GTK_TABLE (table), alignment, 0, 3, 3, 4, 0, 0, 0, 0);
+  gtk_alignment_set_padding (GTK_ALIGNMENT (alignment), 0, 6, 20, 0); /*padding left*/
+  gtk_container_add (GTK_CONTAINER (alignment), tmpwidget);
+  gtk_widget_show (tmpwidget);
+
+  /*
+   * delay
+   */
+  /* spin button */
+  box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
+  gimp_table_attach_aligned (GTK_TABLE (table), 0, 4, _("_Delay:"),
+                             0, 0.5, box, 3, TRUE);
+  gtk_widget_show (box);
+
+  gimp_help_set_help_data (box,
+                           _("Enter time span in milliseconds in which "
+                             "each frame is rendered."),
+                           NULL);
+
+  adjustment = (GtkAdjustment *)
+    gtk_adjustment_new (xmcvals.delay, CURSOR_MINIMUM_DELAY,
+                        CURSOR_MAX_DELAY, 1, 5, 0);
+  tmpwidget = gimp_spin_button_new (adjustment, 1.0, 0);
+  gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (tmpwidget), TRUE);
+  g_value_set_double (&val, 1.0);
+  g_object_set_property (G_OBJECT (tmpwidget), "xalign", &val);/* align right*/
+  gtk_box_pack_start (GTK_BOX (box), tmpwidget, TRUE, TRUE, 0);
+  gtk_widget_show (tmpwidget);
+
+  g_signal_connect (adjustment, "value-changed",
+                    G_CALLBACK (gimp_int_adjustment_update),
+                    &xmcvals.delay);
+
+  /* appended "ms" */
+  tmpwidget = gtk_label_new ("ms");
+  gtk_label_set_xalign (GTK_LABEL (tmpwidget), 0.0); /*align left*/
+  gtk_box_pack_start (GTK_BOX (box), tmpwidget, TRUE, TRUE, 0);
+  gtk_widget_show (tmpwidget);
+
+  /* Replace delay? */
+  tmpwidget =
+    gimp_int_radio_group_new (FALSE, NULL, G_CALLBACK (gimp_radio_button_update),
+                             &xmcvals.delay_replace, xmcvals.delay_replace,
+                             _("_Use this value only for a frame which delay "
+                               "is not specified."),
+                             FALSE, NULL,
+                             _("_Replace the delay of all frames even if it "
+                               "is specified."),
+                             TRUE,  NULL,
+                             NULL);
+  alignment = gtk_alignment_new (0.5, 0.5, 1.0, 1.0);
+  gtk_widget_show (alignment);
+  gtk_table_attach (GTK_TABLE (table), alignment, 0, 3, 5, 6, 0, 0, 0, 0);
+  gtk_alignment_set_padding (GTK_ALIGNMENT (alignment), 0, 6, 20, 0); /*padding left*/
+  gtk_container_add (GTK_CONTAINER (alignment), tmpwidget);
+  gtk_widget_show (tmpwidget);
+
+  /*
+   *  Copyright
+   */
+  tmpwidget = gtk_entry_new ();
+  /* Maximum length will be clamped to 65536 */
+  gtk_entry_set_max_length (GTK_ENTRY (tmpwidget), XCURSOR_COMMENT_MAX_LEN);
+
+  if (xmcparas.comments[0])
+    {
+      gtk_entry_set_text (GTK_ENTRY (tmpwidget),
+                          gimp_any_to_utf8 (xmcparas.comments[0], - 1, NULL));
+      /* show warning if comment is over 65535 characters
+       * because gtk_entry can hold only that. */
+      if (strlen (gtk_entry_get_text (GTK_ENTRY (tmpwidget))) >= 65535)
+        g_message (_("The part of copyright information "
+                     "that exceeded 65535 characters was removed."));
+    }
+
+  g_signal_connect (tmpwidget, "changed",
+                     G_CALLBACK (comment_entry_callback),
+                     xmcparas.comments);
+  gtk_widget_show (tmpwidget);
+  /* tooltip */
+  gimp_help_set_help_data (tmpwidget,
+                        _("Enter copyright information."),
+                        NULL);
+  gimp_table_attach_aligned (GTK_TABLE (table), 0, 6, _("_Copyright:"),
+                             0, 0.5, tmpwidget, 3, FALSE);
+  /*
+   *  License
+   */
+  tmpwidget = gtk_entry_new ();
+  /* Maximum length will be clamped to 65536 */
+  gtk_entry_set_max_length (GTK_ENTRY (tmpwidget), XCURSOR_COMMENT_MAX_LEN);
+
+  if (xmcparas.comments[1])
+    {
+      gtk_entry_set_text (GTK_ENTRY (tmpwidget),
+                          gimp_any_to_utf8 (xmcparas.comments[1], - 1, NULL));
+      /* show warning if comment is over 65535 characters
+       * because gtk_entry can hold only that. */
+      if (strlen (gtk_entry_get_text (GTK_ENTRY (tmpwidget))) >= 65535)
+        g_message (_("The part of license information "
+                     "that exceeded 65535 characters was removed."));
+    }
+
+  g_signal_connect (tmpwidget, "changed",
+                     G_CALLBACK (comment_entry_callback),
+                     xmcparas.comments + 1);
+  gtk_widget_show (tmpwidget);
+  /* tooltip */
+  gimp_help_set_help_data (tmpwidget,
+                        _("Enter license information."),
+                        NULL);
+  gimp_table_attach_aligned (GTK_TABLE (table), 0, 7, _("_License:"),
+                             0, 0.5, tmpwidget, 3, FALSE);
+  /*
+   *  Other
+   */
+  /* We use gtk_text_view for "Other" while "Copyright" & "License" is entered
+   * in gtk_entry because We want allow '\n' for "Other". */
+  label = gtk_label_new_with_mnemonic (_("_Other:"));
+  gtk_widget_show (label);
+  gtk_label_set_xalign (GTK_LABEL (label), 0.0); /*align top-left*/
+  gtk_label_set_yalign (GTK_LABEL (label), 0.0); /*align top-left*/
+  gtk_table_attach (GTK_TABLE (table), label, 0, 1, 8, 9, GTK_FILL, 0, 0, 0);
+  /* content of Other */
+  /* scrolled window */
+  box = gtk_scrolled_window_new (NULL, NULL);
+  gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (box),
+                                       GTK_SHADOW_IN);
+  gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (box),
+                                  GTK_POLICY_AUTOMATIC,
+                                  GTK_POLICY_AUTOMATIC);
+  gtk_table_attach (GTK_TABLE (table), box, 1, 3, 8, 9, GTK_FILL, 0, 0, 0);
+  gtk_widget_show (box);
+  /* textbuffer */
+  textbuffer = gtk_text_buffer_new (NULL);
+  if (xmcparas.comments[2])
+    gtk_text_buffer_set_text (textbuffer,
+                              gimp_any_to_utf8 (xmcparas.comments[2], -1, NULL),
+                              -1);
+  g_signal_connect (textbuffer, "changed",
+                     G_CALLBACK (text_view_callback),
+                     xmcparas.comments + 2);
+  /* textview */
+  tmpwidget =
+    gtk_text_view_new_with_buffer (GTK_TEXT_BUFFER (textbuffer));
+  gtk_text_view_set_accepts_tab (GTK_TEXT_VIEW (tmpwidget), FALSE);
+  gtk_text_view_set_wrap_mode (GTK_TEXT_VIEW (tmpwidget), GTK_WRAP_WORD);
+  g_object_unref (textbuffer);
+  gtk_text_view_set_wrap_mode (GTK_TEXT_VIEW (tmpwidget), GTK_WRAP_WORD);
+  gtk_container_add (GTK_CONTAINER (box), tmpwidget);
+  gtk_widget_show (tmpwidget);
+  /* tooltip */
+  gimp_help_set_help_data (tmpwidget,
+                        _("Enter other comment if you want."),
+                        NULL);
+  gtk_label_set_mnemonic_widget (GTK_LABEL (label), tmpwidget);
+
+  /*
+   *  all widget is prepared. Let's show dialog.
+   */
+  gtk_widget_show (dialog);
+
+  run = (gimp_dialog_run (GIMP_DIALOG (dialog)) == GTK_RESPONSE_OK);
+
+  gtk_widget_destroy (dialog);
+
+  return run;
+}
+
+/*
+ * callback function of gtk_entry for "copyright" and "license".
+ * "other" is processed by text_view_callback
+ */
+static void
+comment_entry_callback (GtkWidget  *widget,
+                        gchar     **commentp)
+{
+  const gchar *text;
+
+  g_return_if_fail (commentp);
+
+  text = gtk_entry_get_text (GTK_ENTRY (widget));
+
+  /* This will not happen because sizeof(gtk_entry) < XCURSOR_COMMENT_MAX_LEN */
+  g_return_if_fail (strlen (text) <= XCURSOR_COMMENT_MAX_LEN);
+
+  g_free (*commentp);
+  *commentp = g_strdup (text);
+}
+
+static void
+text_view_callback (GtkTextBuffer  *buffer,
+                    gchar         **commentp)
+{
+  GtkTextIter  start_iter;
+  GtkTextIter  end_iter;
+  gchar       *text;
+
+  g_return_if_fail (commentp != NULL);
+
+  gtk_text_buffer_get_bounds (buffer, &start_iter, &end_iter);
+  text = gtk_text_buffer_get_text (buffer, &start_iter, &end_iter, FALSE);
+
+  if (strlen (text) > XCURSOR_COMMENT_MAX_LEN)
+    {
+      g_message (_("Comment is limited to %d characters."),
+                 XCURSOR_COMMENT_MAX_LEN);
+
+      gtk_text_buffer_get_iter_at_offset (buffer, &start_iter,
+                                          XCURSOR_COMMENT_MAX_LEN - 1);
+      gtk_text_buffer_get_end_iter (buffer, &end_iter);
+
+      gtk_text_buffer_delete (buffer, &start_iter, &end_iter);
+    }
+  else
+    {
+      g_free (*commentp);
+      *commentp = g_strdup (text);
+    }
+}
+
+/**
+ * Set default hotspot based on hotspotRange.
+**/
+static gboolean
+load_default_hotspot (const gint32   image_ID,
+                      GeglRectangle *hotspotRange)
+{
+
+  g_return_val_if_fail (hotspotRange, FALSE);
+
+  if ( /* if we cannot load hotspot correctly */
+      ! get_hotspot_from_parasite (image_ID) ||
+     /* ,or hostspot is out of range */
+      ! pix_in_region (xmcparas.x, xmcparas.y, hotspotRange))
+    {
+      /* then use top left point of hotspotRange as fallback. */
+      xmcparas.x = hotspotRange->x;
+      xmcparas.y = hotspotRange->y;
+    }
+
+  return TRUE;
+}
+
+/*
+ * 'save_image ()' - Save the specified image to X cursor file.
+ */
+
+static gboolean
+save_image (const gchar *filename,
+            gint32       image_ID,
+            gint32       drawable_ID,
+            gint32       orig_image_ID,
+            GError     **error)
+{
+  FILE            *fp;                     /* File pointer */
+  gboolean         dimension_warn = FALSE; /* become TRUE if even one
+                                            * of the dimensions of the
+                                            * frames of the cursor is
+                                            * over
+                                            * MAX_BITMAP_CURSOR_SIZE */
+  gboolean         size_warn = FALSE;      /* become TRUE if even one
+                                            * of the nominal size of
+                                            * the frames is not
+                                            * supported by
+                                            * gnome-appearance-properties */
+  GRegex          *re;                     /* used to get size and delay from
+                                            * framename */
+  XcursorComments *commentsp;              /* pointer to comments */
+  XcursorImages   *imagesp;                /* pointer to images */
+  gint32          *layers;                 /* Array of layer */
+  gint32          *orig_layers;            /* Array of layer of orig_image */
+  gint             nlayers;                /* Number of layers */
+  gchar           *framename;              /* framename of a layer */
+  GeglRectangle    save_rgn;               /* region to save */
+  gint             layer_xoffset, layer_yoffset;
+  /* temporary buffer which store pixel data (guchar * bpp = guint32) */
+  guint32          pixelbuf[SQR (MAX_SAVE_DIMENSION)];
+  gint             i, j;                   /* Looping vars */
+
+  /* This will be used in set_size_and_delay function later.  To
+   * define this in that function is easy to read but place here to
+   * reduce overheads.
+   */
+  re = g_regex_new ("[(][ 0]*(\\d+)[ ]*(px|ms)[ ]*[)]",
+                    G_REGEX_CASELESS | G_REGEX_OPTIMIZE,
+                    0,
+                    NULL);
+
+  gimp_progress_init_printf (_("Saving '%s'"),
+                             gimp_filename_to_utf8 (filename));
+
+  /*
+   * Open the file pointer.
+   */
+  DM_XMC ("Open the file pointer.\n");
+  fp = g_fopen (filename, "wb");
+  if (fp == NULL)
+    {
+      g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno),
+                   _("Could not open '%s' for writing: %s"),
+                   gimp_filename_to_utf8 (filename), g_strerror (errno));
+      return FALSE;
+    }
+
+  /* get layers */
+  orig_layers = gimp_image_get_layers (orig_image_ID, &nlayers);
+  layers = gimp_image_get_layers (image_ID, &nlayers);
+
+  /* create new XcursorImages. */
+  imagesp = XcursorImagesCreate (nlayers);
+  if (!imagesp)
+    {
+      DM_XMC ("Failed to XcursorImagesCreate!\n");
+      fclose (fp);
+      return FALSE;
+    }
+  imagesp->nimage = nlayers;
+
+  /* XcursorImages also have `name' member but it is not used as long as I know.
+     We leave it NULL here. */
+
+  /*
+   *  Now we start to convert each layer to a XcurosrImage one by one.
+   */
+  for (i = 0; i < nlayers; i++)
+    {
+      GeglBuffer *buffer;
+      const Babl *format;
+      gint        width;
+      gint        height;
+
+      buffer = gimp_drawable_get_buffer (layers[nlayers - 1 - i]);
+
+      width  = gegl_buffer_get_width  (buffer);
+      height = gegl_buffer_get_height (buffer);
+
+      format = babl_format ("R'G'B'A u8");
+
+      /* get framename of this layer */
+      framename = gimp_item_get_name (layers[nlayers - 1 - i]);
+      /* get offset of this layer. */
+      gimp_drawable_offsets (layers[nlayers - 1 - i], &layer_xoffset, &layer_yoffset);
+
+      /*
+       * layer dimension check.
+       */
+      DM_XMC ("layer size check.\n");
+      /* We allow to save a cursor which dimensions are no more than
+       * MAX_SAVE_DIMENSION but after auto-cropping, we warn (only
+       * warn, don't stop) if dimension is over
+       * MAX_BITMAP_CURSOR_SIZE.
+       */
+      if (width > MAX_SAVE_DIMENSION)
+        {
+          g_set_error (error, 0, 0,
+                       _("Frame '%s' is too wide. Please reduce to no more than %dpx."),
+                       gimp_any_to_utf8 (framename, -1, NULL),
+                       MAX_SAVE_DIMENSION);
+          fclose (fp);
+          return FALSE;
+        }
+
+      if (height > MAX_SAVE_DIMENSION)
+        {
+          g_set_error (error, 0, 0,
+                       _("Frame '%s' is too high. Please reduce to no more than %dpx."),
+                       gimp_any_to_utf8 (framename, -1, NULL),
+                       MAX_SAVE_DIMENSION);
+          fclose (fp);
+          return FALSE;
+        }
+
+      if (height == 0 || width == 0)
+        {
+          g_set_error (error, 0, 0,
+                       _("Width and/or height of frame '%s' is zero!"),
+                       gimp_any_to_utf8 (framename, -1, NULL));
+          fclose (fp);
+          return FALSE;
+        }
+
+      if (xmcvals.crop) /* with auto-cropping */
+        {
+          /* get the region of auto-cropped area. */
+          DM_XMC ("get_cropped_region\n");
+          get_cropped_region (&save_rgn, buffer);
+
+          /* don't forget save_rgn's origin is not a entire image
+           * but a layer which we are doing on.
+          */
+
+          if (save_rgn.width == 0 || save_rgn.height == 0)
+            {/* perfectly transparent frames become 1x1px transparent pixel. */
+              DM_XMC ("get_cropped_region return 0.\n");
+              imagesp->images[i] = XcursorImageCreate (1, 1);
+              if (!imagesp->images[i])
+                {
+                  DM_XMC ("Failed to XcursorImageCreate.\n");
+                  fclose (fp);
+                  return FALSE;
+                }
+              imagesp->images[i]->pixels[0] = 0x0;
+              imagesp->images[i]->xhot = 0;
+              imagesp->images[i]->yhot = 0;
+              set_size_and_delay (framename, &(imagesp->images[i]->size),
+                                  &(imagesp->images[i]->delay), re,
+                                  &size_warn);
+              continue;
+            }
+          /* OK save_rgn is not 0x0 */
+          /* is hotspot in save_rgn ? */
+          if (! pix_in_region (xmcparas.x - layer_xoffset,
+                               xmcparas.y - layer_yoffset,
+                               &save_rgn))
+            { /* if hotspot is not on save_rgn */
+              g_set_error (error, 0, 0,
+                           _("Cannot export the cursor because the hot spot "
+                             "is not on frame '%s'.\n"
+                             "Try to change the hot spot position, "
+                             "layer geometry or export without auto-crop."),
+                           gimp_any_to_utf8 (framename, -1, NULL));
+              fclose (fp);
+              return FALSE;
+            }
+        }
+      else /* if without auto-cropping... */
+        {
+          /* set save_rgn for the case not to auto-crop */
+          save_rgn.width  = width;
+          save_rgn.height = height;
+          save_rgn.x      = 0;
+          save_rgn.y      = 0;
+        }
+
+      /* We warn if the dimension of the layer is over MAX_BITMAP_CURSOR_SIZE. */
+      if (! dimension_warn)
+        {
+          if (save_rgn.width > MAX_BITMAP_CURSOR_SIZE ||
+              save_rgn.height > MAX_BITMAP_CURSOR_SIZE)
+            {
+              dimension_warn = TRUE;
+              /* actual warning is done after the cursor is successfully saved.*/
+            }
+         }
+      /*
+       * Create new XcursorImage.
+       */
+      DM_XMC ("create new xcursorimage.\twidth=%i\theight=%i\n",
+              save_rgn.width, save_rgn.height);
+      imagesp->images[i] = XcursorImageCreate (save_rgn.width, save_rgn.height);
+      /* Cursor width & height is automatically set by function */
+      /* XcursorImageCreate, so no need to set manually. */
+      if (!imagesp->images[i])
+        {
+          DM_XMC ("Failed to XcursorImageCreate.\n");
+          fclose (fp);
+          return FALSE;
+        }
+      /*
+       ** set images[i]'s xhot & yhot.
+       */
+      /* [Cropped layer's hotspot] =
+                   [image's hotspot] - [layer's offset] - [save_rgn's offset]. */
+      DM_XMC ("xhot=%i\tsave_rgn->xoffset=%i\tlayer_xoffset=%i\n",
+              xmcparas.x, layer_xoffset, save_rgn.x);
+      DM_XMC ("yhot=%i\tsave_rgn->yoffset=%i\tlayer_yoffset=%i\n",
+              xmcparas.y, layer_yoffset, save_rgn.y);
+      imagesp->images[i]->xhot = xmcparas.x - layer_xoffset - save_rgn.x;
+      imagesp->images[i]->yhot = xmcparas.y - layer_yoffset - save_rgn.y;
+      DM_XMC ("images[%i]->xhot=%i\tyhot=%i\n", i,
+              imagesp->images[i]->xhot, imagesp->images[i]->yhot);
+
+      /*
+       * set images[i]->pixels
+       */
+      /* get image data to pixelbuf. */
+      gegl_buffer_get (buffer,
+                       GEGL_RECTANGLE (save_rgn.x, save_rgn.y,
+                                       save_rgn.width, save_rgn.height), 1.0,
+                       format, pixelbuf,
+                       GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
+
+      /*convert pixel date to XcursorPixel. */
+      g_assert (save_rgn.width * save_rgn.height < SQR (MAX_SAVE_DIMENSION));
+      for (j = 0; j < save_rgn.width * save_rgn.height; j++)
+        {
+          imagesp->images[i]->pixels[j] = premultiply_alpha (pixelbuf[j]);
+        }
+
+      /*
+       * get back size & delay from framename.
+       */
+      set_size_and_delay (framename, &(imagesp->images[i]->size),
+                          &(imagesp->images[i]->delay), re, &size_warn);
+
+      /*
+       * All property of this XcursorImage is loaded.
+       */
+
+      /* set the layer name of original image with the saved value */
+      g_free (framename);
+      framename = make_framename (imagesp->images[i]->size,
+                                  imagesp->images[i]->delay,
+                                  DISPLAY_DIGIT (imagesp->nimage),
+                                  error);
+      if (! framename)
+        {
+          fclose (fp);
+          return FALSE;
+        }
+
+      gimp_item_set_name (orig_layers[nlayers - 1 - i], framename);
+      g_free (framename);
+
+      g_object_unref (buffer);
+
+      gimp_progress_update ((i + 1) / imagesp->nimage);
+    }
+
+  gimp_progress_update (1.0);
+
+  /*
+   * comment parsing
+   */
+  commentsp = set_cursor_comments ();
+
+#ifdef XMC_DEBUG
+  DM_XMC ("imagesp->nimage=%i\tname=%s\n", imagesp->nimage, imagesp->name);
+  for (i = 0; i < imagesp->nimage; ++i)
+    {
+      DM_XMC ("\timages[%i]->size=%i\n\
+               \twidth=%i\n\
+               \theight=%i\n\
+               \txhot=%i\n\
+               \tyhot=%i\n\
+               \tdelay=%i\n\
+               \t*pixels=%p\n",
+               i,
+               imagesp->images[i]->size,
+               imagesp->images[i]->width,
+               imagesp->images[i]->height,
+               imagesp->images[i]->xhot,
+               imagesp->images[i]->yhot,
+               imagesp->images[i]->delay,
+               imagesp->images[i]->pixels);
+    }
+
+  if (commentsp)
+    {
+      for (i = 0; i < commentsp->ncomment; ++i)
+        {
+          DM_XMC ("comment type=%d\tcomment=%s\n",
+                  commentsp->comments[i]->comment_type,
+                  commentsp->comments[i]->comment);
+        }
+    }
+#endif
+
+  /*
+   *  save cursor to file *fp.
+   */
+
+  if (commentsp)
+    {
+      if (! XcursorFileSave (fp, commentsp, imagesp))
+        {
+          DM_XMC ("Failed to XcursorFileSave.\t%p\t%p\t%p\n",
+                  fp, commentsp, imagesp);
+          fclose (fp);
+          return FALSE;
+        }
+
+    }
+  else /* if no comments exist */
+    {
+      if (! XcursorFileSaveImages (fp, imagesp))
+        {
+          DM_XMC ("Failed to XcursorFileSaveImages.\t%p\t%p\n", fp, imagesp);
+          fclose (fp);
+          return FALSE;
+        }
+    }
+
+  /* actual warning about dimensions */
+  if (dimension_warn)
+    {
+      g_message (_("Your cursor was successfully exported but it contains one or "
+                   "more frames whose width or height is more than %ipx, "
+                   "a historical max dimension value for X bitmap cursors.\n"
+                   "It might be unsupported by some environments."),
+                   MAX_BITMAP_CURSOR_SIZE);
+    }
+  if (size_warn)
+    {
+      g_message (_("Your cursor was successfully exported but it contains one "
+                   "or more frames whose nominal size is not supported by "
+                   "GNOME settings.\n"
+                   "You can satisfy it by checking \"Replace the size of all "
+                   "frames...\" in the export dialog, or your cursor may not "
+                   "appear in GNOME settings."));
+    }
+  /*
+   * Done with the file...
+   */
+  g_regex_unref (re);
+  DM_XMC ("fp=%p\n", fp);
+  fclose (fp);
+  DM_XMC ("%i frames written.\n", imagesp->nimage);
+  XcursorImagesDestroy (imagesp);
+  DM_XMC ("Xcursor destroyed.\n");
+  XcursorCommentsDestroy (commentsp); /* this is safe even if commentsp is NULL. */
+  gimp_progress_end ();
+
+  /* Save the comment back to the original image */
+  for (i = 0; i < 3; i++)
+    {
+      gimp_image_detach_parasite (orig_image_ID, parasiteName[i]);
+
+      if (xmcparas.comments[i])
+        {
+          if (! set_comment_to_pname (orig_image_ID,
+                                      xmcparas.comments[i], parasiteName[i]))
+            {
+              DM_XMC ("Failed to write back %ith comment to orig_image.\n", i);
+            }
+        }
+    }
+  /* Save hotspot back to the original image */
+  set_hotspot_to_parasite (orig_image_ID);
+
+  return TRUE;
+}
+
+static inline guint32
+separate_alpha (guint32 pixel)
+{
+  guint   alpha, red, green, blue;
+  guint32 retval;
+
+#if G_BYTE_ORDER != G_LITTLE_ENDIAN
+  pixel = GUINT32_TO_LE (pixel);
+#endif
+
+  blue = pixel & 0xff;
+  green = (pixel>>8) & 0xff;
+  red = (pixel>>16) & 0xff;
+  alpha = (pixel>>24) & 0xff;
+
+  if (alpha == 0)
+    return 0;
+
+  /* resume separate alpha data. */
+  red   = MIN (red   * 255 / alpha, 255);
+  blue  = MIN (blue  * 255 / alpha, 255);
+  green = MIN (green * 255 / alpha, 255);
+
+  retval = red + (green<<8) + (blue<<16) + (alpha<<24);
+
+#if G_BYTE_ORDER != G_LITTLE_ENDIAN
+  pixel = GUINT32_FROM_LE (pixel);
+#endif
+
+  return retval;
+}
+
+static inline guint32
+premultiply_alpha (guint32 pixel)
+{
+  guint   alpha, red, green, blue;
+  guint32 retval;
+
+#if G_BYTE_ORDER != G_LITTLE_ENDIAN
+  pixel = GUINT32_TO_LE (pixel);
+#endif
+
+  red   = pixel         & 0xff;
+  green = (pixel >>  8) & 0xff;
+  blue  = (pixel >> 16) & 0xff;
+  alpha = (pixel >> 24) & 0xff;
+
+  /* premultiply alpha
+     (see "premultiply_data" function at line 154 of xcursorgen.c) */
+  red   = div_255 (red   * alpha);
+  green = div_255 (green * alpha);
+  blue  = div_255 (blue  * alpha);
+
+  retval = blue + (green << 8) + (red << 16) + (alpha << 24);
+
+#if G_BYTE_ORDER != G_LITTLE_ENDIAN
+  pixel = GUINT32_FROM_LE (pixel);
+#endif
+
+  return retval;
+}
+
+/* set comments to cursor from xmcparas.comments.
+ * don't forget to XcursorCommentsDestroy returned pointer later.
+ */
+static XcursorComments *
+set_cursor_comments (void)
+{
+  gint             i;
+  guint            gcomlen, arraylen;
+  GArray          *xcCommentsArray;
+  XcursorComment  *(xcCommentp[3]) = {NULL,};
+  XcursorComments *xcCommentsp;
+
+  xcCommentsArray = g_array_new (FALSE, FALSE, sizeof (XcursorComment *));
+
+  for (i = 0; i < 3; ++i)
+    {
+      if (xmcparas.comments[i])
+        {
+          gcomlen = strlen (xmcparas.comments[i]);
+          if (gcomlen > 0)
+            {
+              xcCommentp[i] = XcursorCommentCreate (i + 1, gcomlen);
+              /* first argument of XcursorCommentCreate is comment_type
+                 defined in Xcursor.h as enumerator.
+                 i + 1 is appropriate when we dispose parasiteName before MAIN(). */
+              if (!xcCommentp[i])
+                {
+                  g_warning ("Cannot create xcCommentp[%i]\n", i);
+                  return NULL;
+                }
+              else
+                {
+                  g_stpcpy (xcCommentp[i]->comment, xmcparas.comments[i]);
+                  g_array_append_val (xcCommentsArray, xcCommentp[i]);
+                }
+            }
+        }
+    }
+
+  arraylen = xcCommentsArray->len;
+
+  if (arraylen == 0)
+    return NULL;
+
+  xcCommentsp = XcursorCommentsCreate (arraylen);
+  xcCommentsp->ncomment = arraylen;
+
+  for (i = 0; i < arraylen; ++i)
+    {
+      xcCommentsp->comments[i] =
+        g_array_index (xcCommentsArray, XcursorComment* ,i);
+    }
+
+  return xcCommentsp;
+}
+
+/* Load xmcparas.comments from three parasites named as "xmc-copyright",
+ * "xmc-license","gimp-comment".
+ * This alignment sequence is depends on the definition of comment_type
+ * in Xcursor.h .
+ * Don't forget to g_free each element of xmcparas.comments later.
+ */
+static void
+load_comments (const gint32 image_ID)
+{
+  gint i;
+
+  g_return_if_fail (image_ID != -1);
+
+  for (i = 0; i < 3; ++i)
+    xmcparas.comments[i] = get_comment_from_pname (image_ID, parasiteName[i]);
+}
+
+/* Set content to a parasite named as pname. if parasite already
+ * exists, append the new one to the old one with "\n"
+ */
+static gboolean
+set_comment_to_pname (const gint32  image_ID,
+                      const gchar  *content,
+                      const gchar  *pname)
+{
+  gboolean      ret = FALSE;
+  gchar        *tmpstring, *joind;
+  GimpParasite *parasite;
+
+  g_return_val_if_fail (image_ID != -1, FALSE);
+  g_return_val_if_fail (content, FALSE);
+
+  parasite = gimp_image_get_parasite (image_ID, pname);
+  if (! parasite)
+    {
+      parasite = gimp_parasite_new (pname, GIMP_PARASITE_PERSISTENT,
+                                    strlen (content) + 1, content);
+    }
+  else
+    {
+      tmpstring = g_strndup (gimp_parasite_data (parasite),
+                             gimp_parasite_data_size (parasite));
+      gimp_parasite_free (parasite);
+      joind = g_strjoin ("\n", tmpstring, content, NULL);
+      g_free (tmpstring);
+      parasite = gimp_parasite_new (pname, GIMP_PARASITE_PERSISTENT,
+                         strlen (joind) + 1, joind);
+      g_free (joind);
+    }
+
+  if (parasite)
+    {
+      ret = gimp_image_attach_parasite (image_ID, parasite);
+      gimp_parasite_free (parasite);
+    }
+
+  return ret;
+}
+
+/* get back comment from parasite name, don't forget to call
+ * g_free(returned pointer) later
+ */
+static gchar *
+get_comment_from_pname (const gint32  image_ID,
+                        const gchar  *pname)
+{
+  gchar        *string = NULL;
+  GimpParasite *parasite;
+  glong         length;
+
+  g_return_val_if_fail (image_ID != -1, NULL);
+
+  parasite = gimp_image_get_parasite (image_ID, pname);
+  length = gimp_parasite_data_size (parasite);
+
+  if (parasite)
+    {
+      if (length > XCURSOR_COMMENT_MAX_LEN)
+        {
+          length = XCURSOR_COMMENT_MAX_LEN;
+          g_message (_("The parasite \"%s\" is too long for an X cursor "
+                       "comment. It was cut off to fit."),
+                     gimp_any_to_utf8 (pname, -1,NULL));
+        }
+
+      string = g_strndup (gimp_parasite_data (parasite), length);
+      gimp_parasite_free (parasite);
+    }
+
+  return string;
+}
+
+/* Set hotspot to "hot-spot" parasite which format is common with that
+ * of file-xbm.
+ */
+static gboolean
+set_hotspot_to_parasite (gint32 image_ID)
+{
+  gboolean      ret = FALSE;
+  gchar        *tmpstr;
+  GimpParasite *parasite;
+
+  g_return_val_if_fail (image_ID != -1, FALSE);
+
+  tmpstr = g_strdup_printf ("%d %d", xmcparas.x, xmcparas.y);
+  parasite = gimp_parasite_new ("hot-spot",
+                                GIMP_PARASITE_PERSISTENT,
+                                strlen (tmpstr) + 1,
+                                tmpstr);
+  g_free (tmpstr);
+
+  if (parasite)
+    {
+      ret = gimp_image_attach_parasite (image_ID, parasite);
+      gimp_parasite_free (parasite);
+    }
+
+  return ret;
+}
+
+/* Get back xhot & yhot from "hot-spot" parasite.
+ * If succeed, hotspot coordinate is set to xmcparas.x, xmcparas.y and
+ * return TRUE.
+ * If "hot-spot" is not found or broken, return FALSE.
+ */
+static gboolean
+get_hotspot_from_parasite (gint32 image_ID)
+{
+  GimpParasite *parasite;
+
+  g_return_val_if_fail (image_ID != -1, FALSE);
+
+  DM_XMC ("function: getHotsopt\n");
+
+  parasite = gimp_image_get_parasite (image_ID, "hot-spot");
+  if (!parasite)  /* cannot find a parasite named "hot-spot". */
+    {
+      return FALSE;
+    }
+
+  if (sscanf (gimp_parasite_data (parasite),
+              "%i %i", &xmcparas.x, &xmcparas.y) < 2)
+    {  /*cannot load hotspot.(parasite is broken?) */
+      return FALSE;
+    }
+
+  /*OK, hotspot is set to *xhotp & *yhotp. */
+  return TRUE;
+}
+
+/* Set size to sizep, delay to delayp from drawable's framename.
+ */
+static void
+set_size_and_delay (const gchar *framename,
+                    guint32     *sizep,
+                    guint32     *delayp,
+                    GRegex      *re,
+                    gboolean    *size_warnp)
+{
+  guint32     size   = 0;
+  guint32     delay  = 0;
+  gchar      *digits = NULL;
+  gchar      *suffix = NULL;
+  GMatchInfo *info   = NULL;
+
+  g_return_if_fail (framename);
+  g_return_if_fail (sizep);
+  g_return_if_fail (delayp);
+  g_return_if_fail (re);
+
+  DM_XMC ("function: set_size_and_delay\tframename=%s\n", framename);
+
+  /* re is defined at the start of save_image() as
+        [(]                : open parenthesis
+        [ ]*               : ignore zero or more spaces
+        (\\d+)             : the number we want to get out
+        [ ]*               : ignore zero or more spaces
+        (px|ms)            : whether "px"(size) or "ms"(delay)
+        [ ]*               : ignore zero or more spaces
+        [)]                : close parenthesis
+     This is intended to match for the animation-play plug-in. */
+
+  g_regex_match (re, framename, 0, &info);
+
+  while (g_match_info_matches (info))
+    {
+      digits = g_match_info_fetch (info, 1);
+      suffix = g_match_info_fetch (info, 2);
+
+      if (g_ascii_strcasecmp (suffix, "px") == 0)
+        {
+          if (!size) /* substitute it only for the first time */
+            {
+              if (strlen (digits) > 8) /* too large number should be clamped */
+                {
+                  g_message (_("Your cursor was successfully exported but it contains one or "
+                               "more frames whose size is over 8 digits.\n"
+                               "We clamped it to %dpx. You should check the exported cursor."),
+                             MAX_BITMAP_CURSOR_SIZE);
+                  size = MAX_BITMAP_CURSOR_SIZE;
+                }
+              else
+                {
+                  size = atoi (digits);
+                }
+            }
+        }
+      else /* suffix is "ms" */
+        {
+          if (!delay) /* substitute it only for the first time */
+            {
+              if (strlen (digits) > 8) /* too large number should be clamped */
+                delay = CURSOR_MAX_DELAY;
+              else
+                delay = MIN (CURSOR_MAX_DELAY, atoi (digits));
+            }
+        }
+
+      g_free (digits);
+      g_free (suffix);
+
+      g_match_info_next (info, NULL);
+    }
+
+  g_match_info_free (info);
+
+  /* if size is not set, or size_replace is TRUE, set default size
+   * (which was chosen in save dialog) */
+  if (size == 0 || xmcvals.size_replace == TRUE)
+    {
+      size = xmcvals.size;
+    }
+  else if (! *size_warnp &&
+           size != 12 && size != 16 && size != 24 && size != 32 &&
+           size != 36 && size != 40 && size != 48 && size != 64 &&
+           size != 96)
+    { /* if the size is different from these values, we warn about it after
+         successfully saving because gnome-appearance-properties only support
+         them. */
+      *size_warnp = TRUE;
+    }
+
+  *sizep = size;
+
+  /* if delay is not set, or delay_replace is TRUE, set default delay
+   * (which was chosen in save dialog) */
+  if (delay == 0 ||  xmcvals.delay_replace == TRUE)
+    {
+      delay = xmcvals.delay;
+    }
+
+  *delayp = delay;
+
+  DM_XMC ("set_size_and_delay return\tsize=%i\tdelay=%i\n", size, delay);
+}
+
+/* Return framename as format: "([x]px)_[i] ([t]ms) (replace)"
+ * where [x] is nominal size, [t] is delay passed as argument respectively,
+ * and [i] is an index separately counted by [x].
+ * This format is compatible with "animation-play" plug-in.
+ * Don't forget to g_free returned framename later.
+ */
+static gchar *
+make_framename (guint32   size,
+                guint32   delay,
+                guint     indent,
+                GError  **errorp)
+{
+  static struct
+  {
+    guint32 size;
+    guint count;
+  } Counter[MAX_SIZE_NUM + 1] = {{0,}};
+
+  int i;  /* loop index */
+
+  /* don't pass 0 for size. */
+  g_return_val_if_fail (size > 0, NULL);
+
+  /* "count" member of Counter's element means how many time corresponding
+     "size" is passed to this function. The size member of the last element
+     of Counter must be 0, so Counter can have MAX_SIZE_NUM elements at most.
+     This is not a smart way but rather simple than using dynamic method. */
+
+  for (i = 0; Counter[i].size != size; ++i)
+    {
+      if (Counter[i].size == 0) /* the end of Counter elements */
+        {
+          if (i > MAX_SIZE_NUM)
+            {
+              g_set_error (errorp, 0, 0,
+                           /* translators: the %i is *always* 8 here */
+                           _("Sorry, this plug-in cannot handle a cursor "
+                             "which contains over %i different nominal sizes."),
+                           MAX_SIZE_NUM);
+              return NULL;
+            }
+          else /* append new element which "size" is given value. */
+            {
+              Counter[i].size = size;
+              break;
+            }
+        }
+    }
+
+  Counter[i].count += 1;
+
+  return g_strdup_printf ("(%dpx)_%0*d (%dms) (replace)", size, indent,
+                          Counter[i].count, delay);
+}
+
+/* Get the region which is maintained when auto-crop.
+ */
+static void
+get_cropped_region (GeglRectangle *return_rgn,
+                    GeglBuffer    *buffer)
+{
+  gint        width  = gegl_buffer_get_width  (buffer);
+  gint        height = gegl_buffer_get_height (buffer);
+  guint32    *buf    = g_malloc (MAX (width, height) * sizeof (guint32));
+  const Babl *format = babl_format ("R'G'B'A u8");
+  guint       i, j;
+
+  g_return_if_fail (GEGL_IS_BUFFER (buffer));
+
+  DM_XMC ("function:get_cropped_region\n");
+
+  DM_XMC ("getTrim:\tMAX=%i\tpr->w=%i\tpr->h=%i\n", sizeof (buf)/4, pr->w, pr->h);
+
+  /* find left border. */
+  for (i = 0; i < width; ++i)
+    {
+      DM_XMC ("i=%i  width=%i\n", i, width);
+
+      gegl_buffer_get (buffer, GEGL_RECTANGLE (i, 0, 1, height), 1.0,
+                       format, buf,
+                       GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
+
+      for (j = 0; j < height; ++j)
+        {
+          if (pix_is_opaque (buf[j])) /* if a opaque pixel exist. */
+            {
+              return_rgn->x = i;
+              goto find_right;
+            }
+        }
+    }
+
+  /* pr has no opaque pixel. */
+  return_rgn->width = 0;
+  return;
+
+  /* find right border. */
+ find_right:
+  for (i = 0; i < width ; ++i)
+    {
+      DM_XMC ("width-1-i=%i  height=%i\n", width - 1 - i, height);
+
+      gegl_buffer_get (buffer, GEGL_RECTANGLE (width - 1 - i, 0, 1, height), 1.0,
+                       format, buf,
+                       GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
+
+      for (j = 0; j < height; ++j)
+        {
+          if (pix_is_opaque (buf[j])) /* if a opaque pixel exist. */
+            {
+              return_rgn->width = width - i - return_rgn->x;
+              goto find_top;
+            }
+        }
+    }
+  g_return_if_reached ();
+
+  /* find top border. */
+ find_top:
+  for (j = 0; j < height; ++j)
+    {
+      DM_XMC ("j=%i  width=%i\n", j, width);
+
+      gegl_buffer_get (buffer, GEGL_RECTANGLE (0, j, width, 1), 1.0,
+                       format, buf,
+                       GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
+
+      for (i = 0; i < width; ++i)
+        {
+          if (pix_is_opaque (buf[i])) /* if a opaque pixel exist. */
+            {
+              return_rgn->y = j;
+              goto find_bottom;
+            }
+        }
+    }
+
+  g_return_if_reached ();
+
+  /* find bottom border. */
+ find_bottom:
+  for (j = 0; j < height; ++j)
+    {
+      DM_XMC ("height-1-j=%i  width=%i\n", height - 1 - j, width);
+
+      gegl_buffer_get (buffer, GEGL_RECTANGLE (0, height - 1 - j, width, 1), 1.0,
+                       format, buf,
+                       GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
+
+      for (i = 0; i < width; ++i)
+        {
+          if (pix_is_opaque (buf[i])) /* if a opaque pixel exist. */
+            {
+              return_rgn->height = height  - j - return_rgn->y;
+              goto end_trim;
+            }
+        }
+    }
+
+  g_return_if_reached ();
+
+ end_trim:
+  DM_XMC ("width=%i\theight=%i\txoffset=%i\tyoffset=%i\n",
+          return_rgn->width, return_rgn->height,
+          return_rgn->x, return_rgn->y);
+
+  g_free (buf);
+}
+
+/* Return true if alpha of pix is not 0.
+ */
+static inline gboolean
+pix_is_opaque (guint32 pix)
+{
+#if G_BYTE_ORDER != G_LITTLE_ENDIAN
+  pix = GUINT32_TO_LE (pix);
+#endif
+
+  return ((pix >> 24) != 0);
+}
+
+/* Get the intersection of the all layers of the image specified by image_ID.
+ * if the intersection is empty return NULL.
+ * don't forget to g_free returned pointer later.
+ */
+static GeglRectangle *
+get_intersection_of_frames (gint32 image_ID)
+{
+  GeglRectangle *iregion;
+  gint           i;
+  gint32         x1 = G_MININT32, x2 = G_MAXINT32;
+  gint32         y1 = G_MININT32, y2 = G_MAXINT32;
+  gint32         x_off, y_off;
+  gint           nlayers;
+  gint          *layers;
+
+  g_return_val_if_fail (image_ID != -1, FALSE);
+
+  layers = gimp_image_get_layers (image_ID, &nlayers);
+
+  for (i = 0; i < nlayers; ++i)
+    {
+      if (! gimp_drawable_offsets (layers[i], &x_off, &y_off))
+        return NULL;
+
+      x1 = MAX (x1, x_off);
+      y1 = MAX (y1, y_off);
+      x2 = MIN (x2, x_off + gimp_drawable_width  (layers[i]) - 1);
+      y2 = MIN (y2, y_off + gimp_drawable_height (layers[i]) - 1);
+    }
+
+  if (x1 > x2 || y1 > y2)
+    return NULL;
+
+  /* OK intersection exists. */
+  iregion = g_new (GeglRectangle, 1);
+  iregion->x = x1;
+  iregion->y = y1;
+  iregion->width = x2 - x1 + 1;
+  iregion->height = y2 - y1 + 1;
+
+  return iregion;
+}
+
+/* If (x,y) is in xmcrp, return TRUE.
+ */
+static gboolean
+pix_in_region (gint32         x,
+               gint32         y,
+               GeglRectangle *xmcrp)
+{
+  g_return_val_if_fail (xmcrp, FALSE);
+
+  if (x < xmcrp->x || y < xmcrp->y ||
+      x >= xmcrp->x + xmcrp->width || y >= xmcrp->y + xmcrp->height)
+    return FALSE;
+  else
+    return TRUE;
+}
+
+/**
+ * Find out xhot, yhot, width and height of the Xcursor specified by xcIs.
+ * Use NULL for the value you don't want to return.
+**/
+static void
+find_hotspots_and_dimensions (XcursorImages *xcIs,
+                              gint32        *xhotp,
+                              gint32        *yhotp,
+                              gint32        *widthp,
+                              gint32        *heightp)
+{
+  gint32 dw, dh;   /* the distance between hotspot and right(bottom) border */
+  gint32 max_xhot;
+  gint32 max_yhot; /* the maximum value of xhot(yhot) */
+  gint   i;
+
+  g_return_if_fail (xcIs);
+
+  max_xhot = max_yhot = dw = dh = 0;
+
+  for (i = 0; i < xcIs->nimage; ++i)
+    {
+      /* xhot of entire image is the maximum value of xhot of all frames */
+      max_xhot = MAX (xcIs->images[i]->xhot, max_xhot);
+      /* same for yhot */
+      max_yhot = MAX (xcIs->images[i]->yhot, max_yhot);
+      /* the maximum distance between right border and xhot */
+      dw = MAX (dw, xcIs->images[i]->width - xcIs->images[i]->xhot);
+      /* the maximum distance between bottom border and yhot */
+      dh = MAX (dh, xcIs->images[i]->height - xcIs->images[i]->yhot);
+    }
+
+  if (xhotp)
+    *xhotp = max_xhot;
+  if (yhotp)
+    *yhotp = max_yhot;
+  if (widthp)
+    *widthp = dw + max_xhot;
+  if (heightp)
+    *heightp = dh + max_yhot;
+}