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gimp/app/core/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 <string.h>
#include <errno.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <glib-object.h>
#include <glib/gstdio.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpcolor/gimpcolor.h"
#include "core-types.h"
#include "base/temp-buf.h"
#include "gimppalette.h"
#include "gimp-intl.h"
/* local function prototypes */
static void gimp_palette_class_init (GimpPaletteClass *klass);
static void gimp_palette_init (GimpPalette *palette);
static void gimp_palette_finalize (GObject *object);
static gint64 gimp_palette_get_memsize (GimpObject *object,
gint64 *gui_size);
static void gimp_palette_get_preview_size (GimpViewable *viewable,
gint size,
gboolean popup,
gboolean dot_for_dot,
gint *width,
gint *height);
static gboolean gimp_palette_get_popup_size (GimpViewable *viewable,
gint width,
gint height,
gboolean dot_for_dot,
gint *popup_width,
gint *popup_height);
static TempBuf * gimp_palette_get_new_preview (GimpViewable *viewable,
gint width,
gint height);
static gchar * gimp_palette_get_description (GimpViewable *viewable,
gchar **tooltip);
static gboolean gimp_palette_save (GimpData *data,
GError **error);
static gchar * gimp_palette_get_extension (GimpData *data);
static GimpData * gimp_palette_duplicate (GimpData *data,
gboolean stingy_memory_use);
static void gimp_palette_entry_free (GimpPaletteEntry *entry);
/* private variables */
static GimpDataClass *parent_class = NULL;
GType
gimp_palette_get_type (void)
{
static GType palette_type = 0;
if (! palette_type)
{
static const GTypeInfo palette_info =
{
sizeof (GimpPaletteClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_palette_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpPalette),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_palette_init,
};
palette_type = g_type_register_static (GIMP_TYPE_DATA,
"GimpPalette",
&palette_info, 0);
}
return palette_type;
}
static void
gimp_palette_class_init (GimpPaletteClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpObjectClass *gimp_object_class = GIMP_OBJECT_CLASS (klass);
GimpViewableClass *viewable_class = GIMP_VIEWABLE_CLASS (klass);
GimpDataClass *data_class = GIMP_DATA_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
object_class->finalize = gimp_palette_finalize;
gimp_object_class->get_memsize = gimp_palette_get_memsize;
viewable_class->default_stock_id = "gtk-select-color";
viewable_class->get_preview_size = gimp_palette_get_preview_size;
viewable_class->get_popup_size = gimp_palette_get_popup_size;
viewable_class->get_new_preview = gimp_palette_get_new_preview;
viewable_class->get_description = gimp_palette_get_description;
data_class->save = gimp_palette_save;
data_class->get_extension = gimp_palette_get_extension;
data_class->duplicate = gimp_palette_duplicate;
}
static void
gimp_palette_init (GimpPalette *palette)
{
palette->colors = NULL;
palette->n_colors = 0;
palette->n_columns = 0;
}
static void
gimp_palette_finalize (GObject *object)
{
GimpPalette *palette = GIMP_PALETTE (object);
if (palette->colors)
{
g_list_foreach (palette->colors, (GFunc) gimp_palette_entry_free, NULL);
g_list_free (palette->colors);
palette->colors = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gint64
gimp_palette_get_memsize (GimpObject *object,
gint64 *gui_size)
{
GimpPalette *palette = GIMP_PALETTE (object);
GList *list;
gint64 memsize = 0;
for (list = palette->colors; list; list = g_list_next (list))
{
GimpPaletteEntry *entry = list->data;
memsize += sizeof (GList) + sizeof (GimpPaletteEntry);
if (entry->name)
memsize += strlen (entry->name) + 1;
}
return memsize + GIMP_OBJECT_CLASS (parent_class)->get_memsize (object,
gui_size);
}
static void
gimp_palette_get_preview_size (GimpViewable *viewable,
gint size,
gboolean popup,
gboolean dot_for_dot,
gint *width,
gint *height)
{
*width = size;
*height = size / 2;
}
static gboolean
gimp_palette_get_popup_size (GimpViewable *viewable,
gint width,
gint height,
gboolean dot_for_dot,
gint *popup_width,
gint *popup_height)
{
GimpPalette *palette = GIMP_PALETTE (viewable);
gint p_width;
gint p_height;
if (! palette->n_colors)
return FALSE;
if (palette->n_columns)
p_width = palette->n_columns;
else
p_width = MIN (palette->n_colors, 16);
p_height = MAX (1, palette->n_colors / p_width);
if (p_width * 4 > width || p_height * 4 > height)
{
*popup_width = p_width * 4;
*popup_height = p_height * 4;
return TRUE;
}
return FALSE;
}
static TempBuf *
gimp_palette_get_new_preview (GimpViewable *viewable,
gint width,
gint height)
{
GimpPalette *palette = GIMP_PALETTE (viewable);
TempBuf *temp_buf;
guchar *buf;
guchar *b;
GList *list;
guchar white[3] = { 255, 255, 255 };
gint columns;
gint rows;
gint cell_size;
gint x, y;
temp_buf = temp_buf_new (width, height, 3, 0, 0, white);
if (palette->n_columns > 1)
cell_size = MAX (4, width / palette->n_columns);
else
cell_size = 4;
columns = width / cell_size;
rows = height / cell_size;
buf = temp_buf_data (temp_buf);
b = g_new (guchar, width * 3);
list = palette->colors;
for (y = 0; y < rows && list; y++)
{
gint i;
memset (b, 255, width * 3);
for (x = 0; x < columns && list; x++)
{
GimpPaletteEntry *entry = list->data;
list = g_list_next (list);
gimp_rgb_get_uchar (&entry->color,
&b[x * cell_size * 3 + 0],
&b[x * cell_size * 3 + 1],
&b[x * cell_size * 3 + 2]);
for (i = 1; i < cell_size; i++)
{
b[(x * cell_size + i) * 3 + 0] = b[(x * cell_size) * 3 + 0];
b[(x * cell_size + i) * 3 + 1] = b[(x * cell_size) * 3 + 1];
b[(x * cell_size + i) * 3 + 2] = b[(x * cell_size) * 3 + 2];
}
}
for (i = 0; i < cell_size; i++)
memcpy (buf + ((y * cell_size + i) * width) * 3, b, width * 3);
}
g_free (b);
return temp_buf;
}
static gchar *
gimp_palette_get_description (GimpViewable *viewable,
gchar **tooltip)
{
GimpPalette *palette = GIMP_PALETTE (viewable);
if (tooltip)
*tooltip = NULL;
return g_strdup_printf ("%s (%d)",
GIMP_OBJECT (palette)->name,
palette->n_colors);
}
GimpData *
gimp_palette_new (const gchar *name,
gboolean stingy_memory_use)
{
g_return_val_if_fail (name != NULL, NULL);
g_return_val_if_fail (*name != '\0', NULL);
return g_object_new (GIMP_TYPE_PALETTE,
"name", name,
NULL);
}
GimpData *
gimp_palette_get_standard (void)
{
static GimpData *standard_palette = NULL;
if (! standard_palette)
{
standard_palette = gimp_palette_new ("Standard", FALSE);
standard_palette->dirty = FALSE;
gimp_data_make_internal (standard_palette);
g_object_ref (standard_palette);
}
return standard_palette;
}
GList *
gimp_palette_load (const gchar *filename,
gboolean stingy_memory_use,
GError **error)
{
GimpPalette *palette;
GimpPaletteEntry *entry;
gchar str[1024];
gchar *tok;
FILE *file;
gint r, g, b;
gint linenum;
g_return_val_if_fail (filename != NULL, NULL);
g_return_val_if_fail (g_path_is_absolute (filename), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
r = g = b = 0;
file = g_fopen (filename, "r");
if (! file)
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_OPEN,
_("Could not open '%s' for reading: %s"),
gimp_filename_to_utf8 (filename), g_strerror (errno));
return NULL;
}
linenum = 0;
fread (str, 13, 1, file);
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_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
_("Fatal parse error in palette file '%s': "
"Missing magic header.\n"
"Does this file need converting from DOS?"),
gimp_filename_to_utf8 (filename));
else
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
_("Fatal parse error in palette file '%s': "
"Missing magic header."),
gimp_filename_to_utf8 (filename));
fclose (file);
return NULL;
}
palette = g_object_new (GIMP_TYPE_PALETTE, NULL);
if (! fgets (str, sizeof (str), file))
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
_("Fatal parse error in palette file '%s': "
"Read error in line %d."),
gimp_filename_to_utf8 (filename), linenum);
fclose (file);
g_object_unref (palette);
return NULL;
}
linenum++;
if (! strncmp (str, "Name: ", strlen ("Name: ")))
{
gchar *utf8;
utf8 = gimp_any_to_utf8 (&str[strlen ("Name: ")], -1,
_("Invalid UTF-8 string in palette file '%s'"),
gimp_filename_to_utf8 (filename));
g_strstrip (utf8);
gimp_object_set_name (GIMP_OBJECT (palette), utf8);
g_free (utf8);
if (! fgets (str, sizeof (str), file))
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
_("Fatal parse error in palette file '%s': "
"Read error in line %d."),
gimp_filename_to_utf8 (filename), linenum);
fclose (file);
g_object_unref (palette);
return NULL;
}
linenum++;
if (! strncmp (str, "Columns: ", strlen ("Columns: ")))
{
gint columns;
columns = atoi (g_strstrip (&str[strlen ("Columns: ")]));
if (columns < 0 || columns > 256)
{
g_message (_("Reading palette file '%s': "
"Invalid number of columns in line %d. "
"Using default value."),
gimp_filename_to_utf8 (filename), linenum);
columns = 0;
}
palette->n_columns = columns;
if (! fgets (str, sizeof (str), file))
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
_("Fatal parse error in palette file '%s': "
"Read error in line %d."),
gimp_filename_to_utf8 (filename), linenum);
fclose (file);
g_object_unref (palette);
return NULL;
}
linenum++;
}
}
else /* old palette format */
{
gchar *name = g_filename_display_basename (filename);
gimp_object_set_name (GIMP_OBJECT (palette), name);
g_free (name);
}
while (! feof (file))
{
if (str[0] != '#')
{
tok = strtok (str, " \t");
if (tok)
r = atoi (tok);
else
/* maybe we should just abort? */
g_message (_("Reading palette file '%s': "
"Missing RED component in line %d."),
gimp_filename_to_utf8 (filename), linenum);
tok = strtok (NULL, " \t");
if (tok)
g = atoi (tok);
else
g_message (_("Reading palette '%s': "
"Missing GREEN component in line %d."),
gimp_filename_to_utf8 (filename), linenum);
tok = strtok (NULL, " \t");
if (tok)
b = atoi (tok);
else
g_message (_("Reading palette file '%s': "
"Missing BLUE component in line %d."),
gimp_filename_to_utf8 (filename), linenum);
/* optional name */
tok = strtok (NULL, "\n");
if (r < 0 || r > 255 ||
g < 0 || g > 255 ||
b < 0 || b > 255)
g_message (_("Reading palette file '%s': "
"RGB value out of range in line %d."),
gimp_filename_to_utf8 (filename), linenum);
/* don't call gimp_palette_add_entry here, it's rather inefficient */
entry = g_new0 (GimpPaletteEntry, 1);
gimp_rgba_set_uchar (&entry->color,
(guchar) r,
(guchar) g,
(guchar) b,
255);
entry->name = g_strdup (tok ? tok : _("Untitled"));
entry->position = palette->n_colors;
palette->colors = g_list_prepend (palette->colors, entry);
palette->n_colors++;
}
if (! fgets (str, sizeof (str), file))
{
if (feof (file))
break;
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
_("Fatal parse error in palette file '%s': "
"Read error in line %d."),
gimp_filename_to_utf8 (filename), linenum);
fclose (file);
g_object_unref (palette);
return NULL;
}
linenum++;
}
fclose (file);
palette->colors = g_list_reverse (palette->colors);
return g_list_prepend (NULL, palette);
}
static gboolean
gimp_palette_save (GimpData *data,
GError **error)
{
GimpPalette *palette = GIMP_PALETTE (data);
GList *list;
FILE *file;
file = g_fopen (data->filename, "w");
if (! file)
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_OPEN,
_("Could not open '%s' for writing: %s"),
gimp_filename_to_utf8 (data->filename),
g_strerror (errno));
return FALSE;
}
fprintf (file, "GIMP Palette\n");
fprintf (file, "Name: %s\n", GIMP_OBJECT (palette)->name);
fprintf (file, "Columns: %d\n#\n", CLAMP (palette->n_columns, 0, 256));
for (list = palette->colors; list; list = g_list_next (list))
{
GimpPaletteEntry *entry = list->data;
guchar r, g, b;
gimp_rgb_get_uchar (&entry->color, &r, &g, &b);
fprintf (file, "%3d %3d %3d\t%s\n", r, g, b, entry->name);
}
fclose (file);
return TRUE;
}
static gchar *
gimp_palette_get_extension (GimpData *data)
{
return GIMP_PALETTE_FILE_EXTENSION;
}
static GimpData *
gimp_palette_duplicate (GimpData *data,
gboolean stingy_memory_use)
{
GimpPalette *palette = GIMP_PALETTE (data);
GimpPalette *new;
GList *list;
new = g_object_new (GIMP_TYPE_PALETTE, NULL);
new->n_columns = palette->n_columns;
for (list = palette->colors; list; list = g_list_next (list))
{
GimpPaletteEntry *entry = list->data;
gimp_palette_add_entry (new, -1, entry->name, &entry->color);
}
return GIMP_DATA (new);
}
GimpPaletteEntry *
gimp_palette_add_entry (GimpPalette *palette,
gint position,
const gchar *name,
const GimpRGB *color)
{
GimpPaletteEntry *entry;
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"));
if (position < 0 || position >= palette->n_colors)
{
entry->position = palette->n_colors;
palette->colors = g_list_append (palette->colors, entry);
}
else
{
GList *list;
entry->position = position;
palette->colors = g_list_insert (palette->colors, entry, position);
/* renumber the displaced entries */
for (list = g_list_nth (palette->colors, position + 1);
list;
list = g_list_next (list))
{
entry = (GimpPaletteEntry *) list->data;
entry->position += 1;
}
}
palette->n_colors += 1;
/* will make the palette dirty too */
gimp_object_name_changed (GIMP_OBJECT (palette));
return entry;
}
void
gimp_palette_delete_entry (GimpPalette *palette,
GimpPaletteEntry *entry)
{
GList *list;
gint pos = 0;
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++;
}
/* will make the palette dirty too */
gimp_object_name_changed (GIMP_OBJECT (palette));
}
}
void
gimp_palette_set_columns (GimpPalette *palette,
gint columns)
{
g_return_if_fail (GIMP_IS_PALETTE (palette));
columns = CLAMP (columns, 0, 64);
if (palette->n_columns != columns)
{
palette->n_columns = columns;
gimp_data_dirty (GIMP_DATA (palette));
}
}
gint
gimp_palette_get_columns (GimpPalette *palette)
{
g_return_val_if_fail (GIMP_IS_PALETTE (palette), 0);
return palette->n_columns;
}
/* private functions */
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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