mirror of https://github.com/GNOME/gimp.git
561 lines
13 KiB
C
561 lines
13 KiB
C
/* The GIMP -- an image manipulation program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <gtk/gtk.h>
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#include "libgimpcolor/gimpcolor.h"
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#include "apptypes.h"
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#include "gimppalette.h"
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#include "gimprc.h"
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#include "palette_select.h"
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#include "temp_buf.h"
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#include "libgimp/gimpenv.h"
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#include "libgimp/gimpintl.h"
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/* local function prototypes */
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static void gimp_palette_class_init (GimpPaletteClass *klass);
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static void gimp_palette_init (GimpPalette *palette);
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static void gimp_palette_destroy (GtkObject *object);
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static TempBuf * gimp_palette_get_new_preview (GimpViewable *viewable,
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gint width,
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gint height);
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static void gimp_palette_dirty (GimpData *data);
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static gboolean gimp_palette_save (GimpData *data);
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static gchar * gimp_palette_get_extension (GimpData *data);
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static void gimp_palette_entry_free (GimpPaletteEntry *entry);
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/* private variables */
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static GimpDataClass *parent_class = NULL;
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GtkType
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gimp_palette_get_type (void)
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{
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static GtkType palette_type = 0;
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if (! palette_type)
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{
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GtkTypeInfo palette_info =
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{
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"GimpPalette",
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sizeof (GimpPalette),
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sizeof (GimpPaletteClass),
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(GtkClassInitFunc) gimp_palette_class_init,
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(GtkObjectInitFunc) gimp_palette_init,
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/* reserved_1 */ NULL,
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/* reserved_2 */ NULL,
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(GtkClassInitFunc) NULL,
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};
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palette_type = gtk_type_unique (GIMP_TYPE_DATA, &palette_info);
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}
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return palette_type;
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}
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static void
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gimp_palette_class_init (GimpPaletteClass *klass)
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{
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GtkObjectClass *object_class;
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GimpViewableClass *viewable_class;
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GimpDataClass *data_class;
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object_class = (GtkObjectClass *) klass;
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viewable_class = (GimpViewableClass *) klass;
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data_class = (GimpDataClass *) klass;
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parent_class = gtk_type_class (GIMP_TYPE_DATA);
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object_class->destroy = gimp_palette_destroy;
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viewable_class->get_new_preview = gimp_palette_get_new_preview;
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data_class->dirty = gimp_palette_dirty;
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data_class->save = gimp_palette_save;
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data_class->get_extension = gimp_palette_get_extension;
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}
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static void
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gimp_palette_init (GimpPalette *palette)
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{
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palette->colors = NULL;
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palette->n_colors = 0;
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palette->n_columns = 0;
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}
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static void
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gimp_palette_destroy (GtkObject *object)
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{
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GimpPalette *palette;
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GimpPaletteEntry *entry;
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GList *list;
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g_return_if_fail (GIMP_IS_PALETTE (object));
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palette = GIMP_PALETTE (object);
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for (list = palette->colors; list; list = g_list_next (list))
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{
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entry = (GimpPaletteEntry *) list->data;
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gimp_palette_entry_free (entry);
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}
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g_list_free (palette->colors);
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if (GTK_OBJECT_CLASS (parent_class)->destroy)
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GTK_OBJECT_CLASS (parent_class)->destroy (object);
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}
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static TempBuf *
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gimp_palette_get_new_preview (GimpViewable *viewable,
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gint width,
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gint height)
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{
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GimpPalette *palette;
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GimpPaletteEntry *entry;
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TempBuf *temp_buf;
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guchar *buf;
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guchar *b;
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GList *list;
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guchar white[3] = { 255, 255, 255 };
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gint columns;
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gint rows;
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gint x, y, i;
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palette = GIMP_PALETTE (viewable);
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temp_buf = temp_buf_new (width, height,
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3,
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0, 0,
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white);
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#define CELL_SIZE 4
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columns = width / CELL_SIZE;
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rows = height / CELL_SIZE;
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buf = temp_buf_data (temp_buf);
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b = g_new (guchar, width * 3);
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memset (b, 255, width * 3);
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list = palette->colors;
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for (y = 0; y < rows && list; y++)
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{
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for (x = 0; x < columns && list; x++)
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{
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entry = (GimpPaletteEntry *) list->data;
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list = g_list_next (list);
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gimp_rgb_get_uchar (&entry->color,
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&b[x * CELL_SIZE * 3 + 0],
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&b[x * CELL_SIZE * 3 + 1],
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&b[x * CELL_SIZE * 3 + 2]);
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for (i = 1; i < CELL_SIZE; i++)
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{
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b[(x * CELL_SIZE + i) * 3 + 0] = b[(x * CELL_SIZE) * 3 + 0];
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b[(x * CELL_SIZE + i) * 3 + 1] = b[(x * CELL_SIZE) * 3 + 1];
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b[(x * CELL_SIZE + i) * 3 + 2] = b[(x * CELL_SIZE) * 3 + 2];
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}
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}
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for (i = 0; i < CELL_SIZE; i++)
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{
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memcpy (buf + ((y * CELL_SIZE + i) * width) * 3, b, width * 3);
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}
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}
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#undef CELL_SIZE
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g_free (b);
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return temp_buf;
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}
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GimpData *
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gimp_palette_new (const gchar *name)
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{
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GimpPalette *palette = NULL;
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g_return_val_if_fail (name != NULL, NULL);
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g_return_val_if_fail (*name != '\0', NULL);
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palette = GIMP_PALETTE (gtk_object_new (GIMP_TYPE_PALETTE,
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"name", name,
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NULL));
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gimp_data_dirty (GIMP_DATA (palette));
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return GIMP_DATA (palette);
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}
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GimpData *
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gimp_palette_get_standard (void)
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{
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static GimpPalette *standard_palette = NULL;
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if (! standard_palette)
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{
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standard_palette = GIMP_PALETTE (gtk_type_new (GIMP_TYPE_PALETTE));
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gimp_object_set_name (GIMP_OBJECT (standard_palette), "Standard");
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}
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return GIMP_DATA (standard_palette);
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}
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GimpData *
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gimp_palette_load (const gchar *filename)
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{
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GimpPalette *palette;
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gchar str[1024];
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gchar *tok;
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FILE *fp;
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gint r, g, b;
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GimpRGB color;
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gint linenum;
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g_return_val_if_fail (filename != NULL, NULL);
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g_return_val_if_fail (*filename != '\0', NULL);
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r = g = b = 0;
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/* Open the requested file */
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if (! (fp = fopen (filename, "r")))
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{
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g_warning ("Failed to open palette file %s", filename);
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return NULL;
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}
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linenum = 0;
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fread (str, 13, 1, fp);
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str[13] = '\0';
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linenum++;
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if (strcmp (str, "GIMP Palette\n"))
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{
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/* bad magic, but maybe it has \r\n at the end of lines? */
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if (!strcmp (str, "GIMP Palette\r"))
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g_message (_("Loading palette %s:\n"
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"Corrupt palette:\n"
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"missing magic header\n"
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"Does this file need converting from DOS?"), filename);
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else
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g_message (_("Loading palette %s:\n"
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"Corrupt palette: missing magic header"), filename);
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fclose (fp);
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return NULL;
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}
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palette = gtk_type_new (GIMP_TYPE_PALETTE);
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gimp_data_set_filename (GIMP_DATA (palette), filename);
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if (! fgets (str, 1024, fp))
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{
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g_message (_("Loading palette %s (line %d):\nRead error"),
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filename, linenum);
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fclose (fp);
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gtk_object_sink (GTK_OBJECT (palette));
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return NULL;
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}
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linenum++;
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if (! strncmp (str, "Name: ", strlen ("Name: ")))
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{
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gimp_object_set_name (GIMP_OBJECT (palette),
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g_strstrip (&str[strlen ("Name: ")]));
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if (! fgets (str, 1024, fp))
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{
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g_message (_("Loading palette %s (line %d):\nRead error"),
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filename, linenum);
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fclose (fp);
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gtk_object_sink (GTK_OBJECT (palette));
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return NULL;
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}
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linenum++;
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if (! strncmp (str, "Columns: ", strlen ("Columns: ")))
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{
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gint columns;
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columns = atoi (g_strstrip (&str[strlen ("Columns: ")]));
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if (columns < 0 || columns > 256)
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{
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g_message (_("Loading palette %s (line %d):\n"
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"Invalid number or columns"),
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filename, linenum);
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columns = 0;
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}
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palette->n_columns = columns;
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if (! fgets (str, 1024, fp))
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{
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g_message (_("Loading palette %s (line %d):\nRead error"),
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filename, linenum);
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fclose (fp);
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gtk_object_sink (GTK_OBJECT (palette));
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return NULL;
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}
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linenum++;
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}
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}
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else /* old palette format */
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{
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g_warning ("old palette format %s", filename);
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gimp_object_set_name (GIMP_OBJECT (palette), g_basename (filename));
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}
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while (! feof (fp))
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{
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if (str[0] != '#')
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{
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tok = strtok (str, " \t");
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if (tok)
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r = atoi (tok);
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else
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/* maybe we should just abort? */
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g_message (_("Loading palette %s (line %d):\n"
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"Missing RED component"), filename, linenum);
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tok = strtok (NULL, " \t");
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if (tok)
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g = atoi (tok);
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else
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g_message (_("Loading palette %s (line %d):\n"
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"Missing GREEN component"), filename, linenum);
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tok = strtok (NULL, " \t");
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if (tok)
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b = atoi (tok);
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else
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g_message (_("Loading palette %s (line %d):\n"
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"Missing BLUE component"), filename, linenum);
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/* optional name */
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tok = strtok (NULL, "\n");
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if (r < 0 || r > 255 ||
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g < 0 || g > 255 ||
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b < 0 || b > 255)
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g_message (_("Loading palette %s (line %d):\n"
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"RGB value out of range"), filename, linenum);
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gimp_rgba_set_uchar (&color,
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(guchar) r,
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(guchar) g,
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(guchar) b,
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255);
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gimp_palette_add_entry (palette, tok, &color);
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}
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if (! fgets (str, 1024, fp))
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{
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if (feof (fp))
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break;
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g_message (_("Loading palette %s (line %d):\nRead error"),
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filename, linenum);
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fclose (fp);
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gtk_object_sink (GTK_OBJECT (palette));
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return NULL;
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}
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linenum++;
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}
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fclose (fp);
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GIMP_DATA (palette)->dirty = FALSE;
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return GIMP_DATA (palette);
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}
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static void
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gimp_palette_dirty (GimpData *data)
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{
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if (GIMP_DATA_CLASS (parent_class)->dirty)
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GIMP_DATA_CLASS (parent_class)->dirty (data);
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}
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static gboolean
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gimp_palette_save (GimpData *data)
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{
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GimpPalette *palette;
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GimpPaletteEntry *entry;
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GList *list;
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FILE *fp;
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guchar r, g, b;
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palette = GIMP_PALETTE (data);
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if (! (fp = fopen (GIMP_DATA (palette)->filename, "w")))
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{
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g_message (_("Can't save palette \"%s\"\n"),
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GIMP_DATA (palette)->filename);
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return FALSE;
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}
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fprintf (fp, "GIMP Palette\n");
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fprintf (fp, "Name: %s\n", GIMP_OBJECT (palette)->name);
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fprintf (fp, "Columns: %d\n#\n", CLAMP (palette->n_columns, 0, 256));
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for (list = palette->colors; list; list = g_list_next (list))
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{
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entry = (GimpPaletteEntry *) list->data;
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gimp_rgb_get_uchar (&entry->color, &r, &g, &b);
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fprintf (fp, "%3d %3d %3d\t%s\n",
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r, g, b,
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entry->name);
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}
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fclose (fp);
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if (GIMP_DATA_CLASS (parent_class)->save)
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return GIMP_DATA_CLASS (parent_class)->save (data);
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return TRUE;
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}
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static gchar *
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gimp_palette_get_extension (GimpData *data)
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{
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return GIMP_PALETTE_FILE_EXTENSION;
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}
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GimpPaletteEntry *
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gimp_palette_add_entry (GimpPalette *palette,
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const gchar *name,
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GimpRGB *color)
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{
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GimpPaletteEntry *entry;
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g_return_val_if_fail (palette != NULL, NULL);
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g_return_val_if_fail (GIMP_IS_PALETTE (palette), NULL);
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g_return_val_if_fail (color != NULL, NULL);
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entry = g_new0 (GimpPaletteEntry, 1);
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entry->color = *color;
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entry->name = g_strdup (name ? name : _("Untitled"));
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entry->position = palette->n_colors;
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palette->colors = g_list_append (palette->colors, entry);
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palette->n_colors += 1;
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gimp_data_dirty (GIMP_DATA (palette));
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return entry;
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}
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void
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gimp_palette_delete_entry (GimpPalette *palette,
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GimpPaletteEntry *entry)
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{
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GList *list;
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gint pos = 0;
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g_return_if_fail (palette != NULL);
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g_return_if_fail (GIMP_IS_PALETTE (palette));
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g_return_if_fail (entry != NULL);
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if (g_list_find (palette->colors, entry))
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{
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pos = entry->position;
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gimp_palette_entry_free (entry);
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palette->colors = g_list_remove (palette->colors, entry);
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palette->n_colors--;
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for (list = g_list_nth (palette->colors, pos);
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list;
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list = g_list_next (list))
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{
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entry = (GimpPaletteEntry *) list->data;
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entry->position = pos++;
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}
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if (palette->n_colors == 0)
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{
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GimpRGB color;
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gimp_rgba_set (&color, 0.0, 0.0, 0.0, 1.0);
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gimp_palette_add_entry (palette,
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_("Black"),
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&color);
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}
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gimp_data_dirty (GIMP_DATA (palette));
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}
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}
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static void
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gimp_palette_entry_free (GimpPaletteEntry *entry)
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{
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g_return_if_fail (entry != NULL);
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g_free (entry->name);
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g_free (entry);
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}
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