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gimp/app/gimppalette.c

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/* The GIMP -- an 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <gtk/gtk.h>
#include "libgimpcolor/gimpcolor.h"
#include "apptypes.h"
#include "gimppalette.h"
#include "gimprc.h"
#include "palette_select.h"
#include "libgimp/gimpenv.h"
#include "libgimp/gimpintl.h"
enum
{
CHANGED,
LAST_SIGNAL
};
/* local function prototypes */
static void gimp_palette_class_init (GimpPaletteClass *klass);
static void gimp_palette_init (GimpPalette *palette);
static void gimp_palette_destroy (GtkObject *object);
static void gimp_palette_entry_free (GimpPaletteEntry *entry);
/* private variables */
static guint gimp_palette_signals[LAST_SIGNAL] = { 0 };
static GimpObjectClass *parent_class = NULL;
GtkType
gimp_palette_get_type (void)
{
static GtkType palette_type = 0;
if (! palette_type)
{
GtkTypeInfo palette_info =
{
"GimpPalette",
sizeof (GimpPalette),
sizeof (GimpPaletteClass),
(GtkClassInitFunc) gimp_palette_class_init,
(GtkObjectInitFunc) gimp_palette_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL,
};
palette_type = gtk_type_unique (GIMP_TYPE_OBJECT, &palette_info);
}
return palette_type;
}
static void
gimp_palette_class_init (GimpPaletteClass *klass)
{
GtkObjectClass *object_class;
GimpObjectClass *gimp_object_class;
object_class = (GtkObjectClass *) klass;
gimp_object_class = (GimpObjectClass *) klass;
parent_class = gtk_type_class (GIMP_TYPE_OBJECT);
gimp_palette_signals[CHANGED] =
gtk_signal_new ("changed",
GTK_RUN_FIRST,
object_class->type,
GTK_SIGNAL_OFFSET (GimpPaletteClass,
changed),
gtk_signal_default_marshaller,
GTK_TYPE_NONE, 0);
gtk_object_class_add_signals (object_class, gimp_palette_signals,
LAST_SIGNAL);
object_class->destroy = gimp_palette_destroy;
klass->changed = NULL;
}
static void
gimp_palette_init (GimpPalette *palette)
{
palette->filename = NULL;
palette->colors = NULL;
palette->n_colors = 0;
palette->changed = TRUE;
palette->pixmap = NULL;
}
static void
gimp_palette_destroy (GtkObject *object)
{
GimpPalette *palette;
GimpPaletteEntry *entry;
GList *list;
g_return_if_fail (GIMP_IS_PALETTE (object));
palette = GIMP_PALETTE (object);
for (list = palette->colors; list; list = g_list_next (list))
{
entry = (GimpPaletteEntry *) list->data;
gimp_palette_entry_free (entry);
}
g_list_free (palette->colors);
g_free (palette->filename);
if (palette->pixmap)
gdk_pixmap_unref (palette->pixmap);
if (GTK_OBJECT_CLASS (parent_class)->destroy)
GTK_OBJECT_CLASS (parent_class)->destroy (object);
}
GimpPalette *
gimp_palette_new (const gchar *name)
{
GimpPalette *palette = NULL;
GList *pal_path;
gchar *pal_dir;
g_return_val_if_fail (name != NULL, NULL);
g_return_val_if_fail (*name != '\0', NULL);
if (!name || !palette_path)
return NULL;
pal_path = gimp_path_parse (palette_path, 16, TRUE, NULL);
pal_dir = gimp_path_get_user_writable_dir (pal_path);
gimp_path_free (pal_path);
palette = GIMP_PALETTE (gtk_object_new (GIMP_TYPE_PALETTE,
"name", name,
NULL));
if (pal_dir)
{
palette->filename = g_strdup_printf ("%s%s", pal_dir, name);
g_free (pal_dir);
}
return palette;
}
GimpPalette *
gimp_palette_new_from_file (const gchar *filename)
{
GimpPalette *palette;
gchar str[512];
gchar *tok;
FILE *fp;
gint r, g, b;
GimpRGB color;
gint linenum;
g_return_val_if_fail (filename != NULL, NULL);
g_return_val_if_fail (*filename != '\0', NULL);
r = g = b = 0;
/* Open the requested file */
if (! (fp = fopen (filename, "r")))
{
g_warning ("Failed to open palette file %s", filename);
return NULL;
}
linenum = 0;
fread (str, 13, 1, fp);
str[13] = '\0';
linenum++;
if (strcmp (str, "GIMP Palette\n"))
{
/* bad magic, but maybe it has \r\n at the end of lines? */
if (!strcmp (str, "GIMP Palette\r"))
g_message (_("Loading palette %s:\n"
"Corrupt palette:\n"
"missing magic header\n"
"Does this file need converting from DOS?"), filename);
else
g_message (_("Loading palette %s:\n"
"Corrupt palette: missing magic header"), filename);
fclose (fp);
return NULL;
}
palette = gimp_palette_new (g_basename (filename));
while (!feof (fp))
{
if (!fgets (str, 512, fp))
{
if (feof (fp))
break;
g_message (_("Loading palette %s (line %d):\nRead error"),
filename, linenum);
fclose (fp);
gtk_object_sink (GTK_OBJECT (palette));
return NULL;
}
linenum++;
if (str[0] != '#')
{
tok = strtok (str, " \t");
if (tok)
r = atoi (tok);
else
/* maybe we should just abort? */
g_message (_("Loading palette %s (line %d):\n"
"Missing RED component"), filename, linenum);
tok = strtok (NULL, " \t");
if (tok)
g = atoi (tok);
else
g_message (_("Loading palette %s (line %d):\n"
"Missing GREEN component"), filename, linenum);
tok = strtok (NULL, " \t");
if (tok)
b = atoi (tok);
else
g_message (_("Loading palette %s (line %d):\n"
"Missing BLUE component"), filename, linenum);
/* optional name */
tok = strtok (NULL, "\n");
if (r < 0 || r > 255 ||
g < 0 || g > 255 ||
b < 0 || b > 255)
g_message (_("Loading palette %s (line %d):\n"
"RGB value out of range"), filename, linenum);
gimp_rgba_set_uchar (&color,
(guchar) r,
(guchar) g,
(guchar) b,
255);
gimp_palette_add_entry (palette, tok, &color);
}
}
fclose (fp);
palette->changed = FALSE;
return palette;
}
gboolean
gimp_palette_save (GimpPalette *palette)
{
GimpPaletteEntry *entry;
GList *list;
FILE *fp;
guchar r, g, b;
g_return_val_if_fail (palette != NULL, FALSE);
g_return_val_if_fail (GIMP_IS_PALETTE (palette), FALSE);
if (! (fp = fopen (palette->filename, "w")))
{
g_message (_("Can't save palette \"%s\"\n"), palette->filename);
return FALSE;
}
fprintf (fp, "GIMP Palette\n");
fprintf (fp, "# %s -- GIMP Palette file\n", GIMP_OBJECT (palette)->name);
for (list = palette->colors; list; list = g_list_next (list))
{
entry = (GimpPaletteEntry *) list->data;
gimp_rgb_get_uchar (&entry->color, &r, &g, &b);
fprintf (fp, "%d %d %d\t%s\n",
r, g, b,
entry->name);
}
fclose (fp);
return TRUE;
}
GimpPaletteEntry *
gimp_palette_add_entry (GimpPalette *palette,
const gchar *name,
GimpRGB *color)
{
GimpPaletteEntry *entry;
g_return_val_if_fail (palette != NULL, NULL);
g_return_val_if_fail (GIMP_IS_PALETTE (palette), NULL);
g_return_val_if_fail (color != NULL, NULL);
entry = g_new0 (GimpPaletteEntry, 1);
entry->color = *color;
entry->name = g_strdup (name ? name : _("Untitled"));
entry->position = palette->n_colors;
palette->colors = g_list_append (palette->colors, entry);
palette->n_colors += 1;
palette->changed = TRUE;
gtk_signal_emit (GTK_OBJECT (palette), gimp_palette_signals[CHANGED]);
return entry;
}
void
gimp_palette_delete_entry (GimpPalette *palette,
GimpPaletteEntry *entry)
{
GList *list;
gint pos = 0;
g_return_if_fail (palette != NULL);
g_return_if_fail (GIMP_IS_PALETTE (palette));
g_return_if_fail (entry != NULL);
if (g_list_find (palette->colors, entry))
{
pos = entry->position;
gimp_palette_entry_free (entry);
palette->colors = g_list_remove (palette->colors, entry);
palette->n_colors--;
for (list = g_list_nth (palette->colors, pos);
list;
list = g_list_next (list))
{
entry = (GimpPaletteEntry *) list->data;
entry->position = pos++;
}
if (palette->n_colors == 0)
{
GimpRGB color;
gimp_rgba_set (&color, 0.0, 0.0, 0.0, 1.0);
gimp_palette_add_entry (palette,
_("Black"),
&color);
}
palette->changed = TRUE;
gtk_signal_emit (GTK_OBJECT (palette), gimp_palette_signals[CHANGED]);
}
}
void
gimp_palette_delete (GimpPalette *palette)
{
g_return_if_fail (palette != NULL);
g_return_if_fail (GIMP_IS_PALETTE (palette));
if (palette->filename)
unlink (palette->filename);
}
void
gimp_palette_update_preview (GimpPalette *palette,
GdkGC *gc)
{
GimpPaletteEntry *entry;
guchar rgb_buf[SM_PREVIEW_WIDTH * SM_PREVIEW_HEIGHT * 3];
GList *list;
gint index;
g_return_if_fail (palette != NULL);
g_return_if_fail (GIMP_IS_PALETTE (palette));
g_return_if_fail (gc != NULL);
memset (rgb_buf, 0x0, sizeof (rgb_buf));
gdk_draw_rgb_image (palette->pixmap,
gc,
0,
0,
SM_PREVIEW_WIDTH,
SM_PREVIEW_HEIGHT,
GDK_RGB_DITHER_NORMAL,
rgb_buf,
SM_PREVIEW_WIDTH * 3);
index = 0;
for (list = palette->colors; list; list = g_list_next (list))
{
guchar cell[3 * 3 * 3];
gint loop;
entry = (GimpPaletteEntry *) list->data;
gimp_rgb_get_uchar (&entry->color,
&cell[0],
&cell[1],
&cell[2]);
for (loop = 3; loop < 27 ; loop += 3)
{
cell[0 + loop] = cell[0];
cell[1 + loop] = cell[1];
cell[2 + loop] = cell[2];
}
gdk_draw_rgb_image (palette->pixmap,
gc,
1 + (index % ((SM_PREVIEW_WIDTH-2) / 3)) * 3,
1 + (index / ((SM_PREVIEW_WIDTH-2) / 3)) * 3,
3,
3,
GDK_RGB_DITHER_NORMAL,
cell,
3);
index++;
if (index >= (((SM_PREVIEW_WIDTH - 2) * (SM_PREVIEW_HEIGHT - 2)) / 9))
break;
}
}
static void
gimp_palette_entry_free (GimpPaletteEntry *entry)
{
g_return_if_fail (entry != NULL);
g_free (entry->name);
g_free (entry);
}
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