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gimp/app/indexed_palette.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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "gdk/gdkkeysyms.h"
#include "appenv.h"
#include "actionarea.h"
#include "buildmenu.h"
#include "colormaps.h"
#include "color_select.h"
#include "color_area.h"
#include "errors.h"
#include "gdisplay.h"
#include "gimage.h"
#include "gimprc.h"
#include "general.h"
#include "image_render.h"
#include "interface.h"
#include "indexed_palette.h"
#include "palette.h"
#include "undo.h"
#define EVENT_MASK GDK_BUTTON_PRESS_MASK | GDK_ENTER_NOTIFY_MASK
#define CELL_WIDTH 20
#define CELL_HEIGHT 20
#define P_AREA_WIDTH (CELL_WIDTH * 16)
#define P_AREA_HEIGHT (CELL_HEIGHT * 16)
/* Add these features:
*
* load/save colormaps
* requantize
* add color--by clicking in the checked region
* all changes need to flush colormap lookup cache
*/
typedef struct _IndexedPalette IndexedPalette;
struct _IndexedPalette {
GtkWidget *shell;
GtkWidget *vbox;
GtkWidget *palette;
GtkWidget *image_menu;
GtkWidget *image_option_menu;
/* state information */
int gimage_id;
int col_index;
};
/* indexed palette routines */
static void indexed_palette_draw (void);
static void indexed_palette_clear (void);
static void indexed_palette_update (int);
/* indexed palette menu callbacks */
static void indexed_palette_close_callback (GtkWidget *, gpointer);
static void indexed_palette_select_callback (int, int, int, ColorSelectState, void *);
/* event callback */
static gint indexed_palette_area_events (GtkWidget *, GdkEvent *);
/* create image menu */
static void image_menu_callback (GtkWidget *, gpointer);
static GtkWidget * create_image_menu (int *, int *, MenuItemCallback);
/* Only one indexed palette */
static IndexedPalette *indexedP = NULL;
/* Color select dialog */
static ColorSelectP color_select = NULL;
static int color_select_active = 0;
/* the action area structure */
static ActionAreaItem action_items[] =
{
{ "Close", indexed_palette_close_callback, NULL, NULL },
};
static MenuItem indexed_color_ops[] =
{
{ "Close", 'W', GDK_CONTROL_MASK,
indexed_palette_close_callback, NULL, NULL, NULL },
{ NULL, 0, 0, NULL, NULL, NULL, NULL },
};
/**************************************/
/* Public indexed palette functions */
/**************************************/
void
indexed_palette_create (int gimage_id)
{
GtkWidget *vbox;
GtkWidget *frame;
GtkWidget *util_box;
GtkWidget *label;
GtkWidget *arrow_hbox;
GtkWidget *arrow;
GtkWidget *ops_menu;
GtkWidget *menu_bar;
GtkWidget *menu_bar_item;
GtkWidget *hbox;
GtkAccelGroup *accel_group;
int default_index;
if (!indexedP)
{
indexedP = g_malloc (sizeof (IndexedPalette));
indexedP->gimage_id = -1;
accel_group = gtk_accel_group_new ();
/* The shell and main vbox */
indexedP->shell = gtk_dialog_new ();
gtk_window_set_wmclass (GTK_WINDOW (indexedP->shell), "indexed_color_palette", "Gimp");
gtk_window_set_policy (GTK_WINDOW (indexedP->shell), FALSE, FALSE, FALSE);
gtk_window_set_title (GTK_WINDOW (indexedP->shell), "Indexed Color Palette");
gtk_window_add_accel_group (GTK_WINDOW (indexedP->shell), accel_group);
gtk_signal_connect (GTK_OBJECT (indexedP->shell), "delete_event",
GTK_SIGNAL_FUNC (gtk_widget_hide_on_delete),
NULL);
gtk_quit_add_destroy (1, GTK_OBJECT (indexedP->shell));
indexedP->vbox = vbox = gtk_vbox_new (FALSE, 1);
gtk_container_border_width (GTK_CONTAINER (vbox), 1);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (indexedP->shell)->vbox), vbox, TRUE, TRUE, 0);
/* The hbox to hold the command menu and image option menu box */
util_box = gtk_hbox_new (FALSE, 1);
gtk_box_pack_start (GTK_BOX (vbox), util_box, FALSE, FALSE, 0);
/* The GIMP image option menu */
label = gtk_label_new ("Image:");
gtk_box_pack_start (GTK_BOX (util_box), label, FALSE, FALSE, 2);
indexedP->image_option_menu = gtk_option_menu_new ();
gtk_box_pack_start (GTK_BOX (util_box), indexedP->image_option_menu, TRUE, TRUE, 2);
gtk_widget_show (indexedP->image_option_menu);
indexedP->image_menu = create_image_menu (&gimage_id, &default_index, image_menu_callback);
gtk_option_menu_set_menu (GTK_OPTION_MENU (indexedP->image_option_menu), indexedP->image_menu);
if (default_index != -1)
gtk_option_menu_set_history (GTK_OPTION_MENU (indexedP->image_option_menu), default_index);
gtk_widget_show (label);
/* The indexed palette commands pulldown menu */
ops_menu = build_menu (indexed_color_ops, accel_group);
menu_bar = gtk_menu_bar_new ();
gtk_box_pack_start (GTK_BOX (util_box), menu_bar, FALSE, FALSE, 2);
menu_bar_item = gtk_menu_item_new ();
gtk_container_add (GTK_CONTAINER (menu_bar), menu_bar_item);
gtk_menu_item_set_submenu (GTK_MENU_ITEM (menu_bar_item), ops_menu);
arrow_hbox = gtk_hbox_new (FALSE, 1);
gtk_container_add (GTK_CONTAINER (menu_bar_item), arrow_hbox);
label = gtk_label_new ("Ops");
arrow = gtk_arrow_new (GTK_ARROW_DOWN, GTK_SHADOW_OUT);
gtk_box_pack_start (GTK_BOX (arrow_hbox), arrow, FALSE, FALSE, 0);
gtk_box_pack_start (GTK_BOX (arrow_hbox), label, FALSE, FALSE, 4);
gtk_misc_set_alignment (GTK_MISC (label), 0.5, 0.5);
gtk_misc_set_alignment (GTK_MISC (arrow), 0.5, 0.5);
gtk_widget_show (arrow);
gtk_widget_show (label);
gtk_widget_show (arrow_hbox);
gtk_widget_show (menu_bar_item);
gtk_widget_show (menu_bar);
gtk_widget_show (util_box);
/* The palette frame */
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_box_pack_start (GTK_BOX (vbox), frame, TRUE, TRUE, 2);
indexedP->palette = gtk_preview_new (GTK_PREVIEW_COLOR);
gtk_preview_size (GTK_PREVIEW (indexedP->palette), P_AREA_WIDTH, P_AREA_HEIGHT);
gtk_widget_set_events (indexedP->palette, EVENT_MASK);
gtk_signal_connect (GTK_OBJECT (indexedP->palette), "event",
(GtkSignalFunc) indexed_palette_area_events,
NULL);
gtk_container_add (GTK_CONTAINER (frame), indexedP->palette);
gtk_widget_show (indexedP->palette);
gtk_widget_show (frame);
/* some helpful hints */
hbox = gtk_hbox_new(FALSE, 1);
gtk_box_pack_start (GTK_BOX (vbox), hbox, TRUE, TRUE, 1);
label = gtk_label_new (" Click to select color. Right-click to edit color");
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 1);
gtk_widget_show (hbox);
gtk_widget_show (label);
/* The action area */
action_items[0].user_data = indexedP;
build_action_area (GTK_DIALOG (indexedP->shell), action_items, 1, 0);
gtk_widget_show (vbox);
gtk_widget_show (indexedP->shell);
indexed_palette_update (gimage_id);
indexed_palette_update_image_list ();
}
else
{
if (!GTK_WIDGET_VISIBLE (indexedP->shell))
gtk_widget_show (indexedP->shell);
indexed_palette_update (gimage_id);
indexed_palette_update_image_list ();
}
}
void
indexed_palette_update_image_list ()
{
int default_index;
int default_id;
if (! indexedP)
return;
default_id = indexedP->gimage_id;
indexedP->image_menu = create_image_menu (&default_id, &default_index, image_menu_callback);
gtk_option_menu_set_menu (GTK_OPTION_MENU (indexedP->image_option_menu), indexedP->image_menu);
if (default_index != -1)
{
if (! GTK_WIDGET_IS_SENSITIVE (indexedP->vbox))
gtk_widget_set_sensitive (indexedP->vbox, TRUE);
gtk_option_menu_set_history (GTK_OPTION_MENU (indexedP->image_option_menu), default_index);
indexed_palette_update (default_id);
}
else
{
if (GTK_WIDGET_IS_SENSITIVE (indexedP->vbox))
{
gtk_widget_set_sensitive (indexedP->vbox, FALSE);
indexed_palette_clear ();
}
}
}
static void
indexed_palette_draw ()
{
GImage *gimage;
int i, j, k, l, b;
int col;
guchar row[P_AREA_WIDTH * 3];
if (!indexedP)
return;
if ((gimage = gimage_get_ID (indexedP->gimage_id)) == NULL)
return;
col = 0;
for (i = 0; i < 16; i++)
{
for (j = 0; j < 16 && col < gimage->num_cols; j++, col++)
{
for (k = 0; k < CELL_WIDTH; k++)
for (b = 0; b < 3; b++)
row[(j * CELL_WIDTH + k) * 3 + b] = gimage->cmap[col * 3 + b];
}
for (k = 0; k < CELL_HEIGHT; k++)
{
for (l = j * CELL_WIDTH; l < 16 * CELL_WIDTH; l++)
for (b = 0; b < 3; b++)
row[l * 3 + b] = ((((i * CELL_HEIGHT + k) & 0x4) ? (l) : (l + 0x4)) & 0x4) ?
blend_light_check[0] : blend_dark_check[0];
gtk_preview_draw_row (GTK_PREVIEW (indexedP->palette), row, 0,
i * CELL_HEIGHT + k, P_AREA_WIDTH);
}
}
gtk_widget_draw (indexedP->palette, NULL);
}
static void
indexed_palette_clear ()
{
int i, j;
int offset;
guchar row[P_AREA_WIDTH * 3];
if (!indexedP)
return;
for (i = 0; i < P_AREA_HEIGHT; i += 4)
{
offset = (i & 0x4) ? 0x4 : 0x0;
for (j = 0; j < P_AREA_WIDTH; j++)
{
row[j * 3 + 0] = row[j * 3 + 1] = row[j * 3 + 2] =
((j + offset) & 0x4) ? blend_light_check[0] : blend_dark_check[0];
}
for (j = 0; j < 4; j++)
gtk_preview_draw_row (GTK_PREVIEW (indexedP->palette), row, 0, i + j, P_AREA_WIDTH);
}
gtk_widget_draw (indexedP->palette, NULL);
}
static void
indexed_palette_update (int gimage_id)
{
GImage *gimage;
if (!indexedP)
return;
if ((gimage = gimage_get_ID (gimage_id)) == NULL)
return;
if (gimage_base_type (gimage) == INDEXED)
{
indexedP->gimage_id = gimage_id;
indexed_palette_draw ();
}
}
static void
indexed_palette_close_callback (GtkWidget *w,
gpointer client_data)
{
if (!indexedP)
return;
gtk_widget_hide (indexedP->shell);
}
static void
indexed_palette_select_callback (int r,
int g,
int b,
ColorSelectState state,
void *client_data)
{
GImage *gimage;
if (!indexedP)
return;
if ((gimage = gimage_get_ID (indexedP->gimage_id)) == NULL)
return;
if (color_select )
{
switch (state) {
case COLOR_SELECT_UPDATE:
break;
case COLOR_SELECT_OK:
gimage->cmap[indexedP->col_index * 3 + 0] = r;
gimage->cmap[indexedP->col_index * 3 + 1] = g;
gimage->cmap[indexedP->col_index * 3 + 2] = b;
gdisplays_update_full (gimage->ID);
indexed_palette_draw ();
/* Fallthrough */
case COLOR_SELECT_CANCEL:
color_select_hide (color_select);
color_select_active = FALSE;
}
}
}
static gint
indexed_palette_area_events (GtkWidget *widget,
GdkEvent * event)
{
GImage *gimage;
GdkEventButton *bevent;
guchar r, g, b;
if (!indexedP)
return FALSE;
if ((gimage = gimage_get_ID (indexedP->gimage_id)) == NULL)
return FALSE;
switch (event->type)
{
case GDK_BUTTON_PRESS:
bevent = (GdkEventButton *) event;
if (bevent->button == 1)
{
indexedP->col_index = 16 * ((int)bevent->y / CELL_HEIGHT) + ((int)bevent->x / CELL_WIDTH);
r = gimage->cmap[indexedP->col_index * 3 + 0];
g = gimage->cmap[indexedP->col_index * 3 + 1];
b = gimage->cmap[indexedP->col_index * 3 + 2];
if (active_color == FOREGROUND)
palette_set_foreground (r, g, b);
else if (active_color == BACKGROUND)
palette_set_background (r, g, b);
}
if (bevent->button == 3)
{
indexedP->col_index = 16 * ((int)bevent->y / CELL_HEIGHT) + ((int)bevent->x / CELL_WIDTH);
r = gimage->cmap[indexedP->col_index * 3 + 0];
g = gimage->cmap[indexedP->col_index * 3 + 1];
b = gimage->cmap[indexedP->col_index * 3 + 2];
if (! color_select)
{
color_select = color_select_new (r, g, b, indexed_palette_select_callback, NULL, FALSE);
color_select_active = 1;
}
else
{
if (! color_select_active)
color_select_show (color_select);
color_select_set_color (color_select, r, g, b, 1);
}
}
break;
default:
break;
}
return FALSE;
}
static void
image_menu_callback (GtkWidget *w,
gpointer client_data)
{
if (!indexedP)
return;
if (gimage_get_ID ((long) client_data) != NULL)
{
indexed_palette_update ((long) client_data);
}
}
static GtkWidget *
create_image_menu (int *default_id,
int *default_index,
MenuItemCallback callback)
{
extern GSList *image_list;
GImage *gimage;
GtkWidget *menu_item;
GtkWidget *menu;
char *menu_item_label;
char *image_name;
GSList *tmp;
int num_items = 0;
int id;
id = -1;
*default_index = -1;
menu = gtk_menu_new ();
tmp = image_list;
while (tmp)
{
gimage = tmp->data;
tmp = g_slist_next (tmp);
if (gimage_base_type (gimage) == INDEXED)
{
id = -1;
/* make sure the default index gets set to _something_, if possible */
if (*default_index == -1)
{
id = gimage->ID;
*default_index = num_items;
}
if (gimage->ID == *default_id)
{
id = *default_id;
*default_index = num_items;
}
image_name = prune_filename (gimage_filename (gimage));
menu_item_label = (char *) g_malloc (strlen (image_name) + 15);
sprintf (menu_item_label, "%s-%d", image_name, gimage->ID);
menu_item = gtk_menu_item_new_with_label (menu_item_label);
gtk_signal_connect (GTK_OBJECT (menu_item), "activate",
(GtkSignalFunc) callback,
(gpointer) ((long) gimage->ID));
gtk_container_add (GTK_CONTAINER (menu), menu_item);
gtk_widget_show (menu_item);
g_free (menu_item_label);
num_items ++;
}
}
if (!num_items)
{
menu_item = gtk_menu_item_new_with_label ("none");
gtk_container_add (GTK_CONTAINER (menu), menu_item);
gtk_widget_show (menu_item);
}
*default_id = id;
return menu;
}
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