mirror of https://github.com/GNOME/gimp.git
472 lines
11 KiB
C
472 lines
11 KiB
C
/* The GIMP -- an image manipulation program
|
|
* Copyright (C) 1999 Manish Singh
|
|
*
|
|
* 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 <string.h>
|
|
|
|
#include "gdisplay_color.h"
|
|
#include "gdisplay.h"
|
|
#include "gimpimageP.h"
|
|
|
|
#include "libgimp/parasite.h"
|
|
#include "libgimp/gimpintl.h"
|
|
|
|
#include <gtk/gtk.h>
|
|
|
|
typedef struct _ColorDisplayInfo ColorDisplayInfo;
|
|
|
|
struct _ColorDisplayInfo {
|
|
char *name;
|
|
GimpColorDisplayMethods methods;
|
|
GSList *refs;
|
|
};
|
|
|
|
static GHashTable *color_display_table = NULL;
|
|
|
|
typedef struct _GammaContext GammaContext;
|
|
|
|
struct _GammaContext
|
|
{
|
|
double gamma;
|
|
guchar *lookup;
|
|
|
|
GtkWidget *shell;
|
|
GtkWidget *spinner;
|
|
};
|
|
|
|
static void color_display_foreach (gpointer key,
|
|
gpointer value,
|
|
gpointer user_data);
|
|
|
|
static void gdisplay_color_detach_real (GDisplay *gdisp,
|
|
ColorDisplayNode *node,
|
|
gboolean unref);
|
|
static gint node_name_compare (ColorDisplayNode *node,
|
|
const char *name);
|
|
|
|
static gpointer gamma_new (int type);
|
|
static void gamma_create_lookup_table (GammaContext *context);
|
|
static void gamma_destroy (gpointer cd_ID);
|
|
static void gamma_convert (gpointer cd_ID,
|
|
guchar *buf,
|
|
int width,
|
|
int height,
|
|
int bpp);
|
|
static void gamma_load (gpointer cd_ID,
|
|
Parasite *state);
|
|
static Parasite * gamma_save (gpointer cd_ID);
|
|
static void gamma_configure_ok_callback (GtkWidget *widget,
|
|
gpointer data);
|
|
static void gamma_configure_cancel_callback (GtkWidget *widget,
|
|
gpointer data);
|
|
static gint gamma_configure_delete_callback (GtkWidget *widget,
|
|
GdkEvent *event,
|
|
gpointer data);
|
|
static void gamma_configure (gpointer cd_ID);
|
|
|
|
void
|
|
gdisplay_color_init (void)
|
|
{
|
|
GimpColorDisplayMethods methods = {
|
|
NULL,
|
|
gamma_new,
|
|
gamma_convert,
|
|
gamma_destroy,
|
|
NULL,
|
|
gamma_load,
|
|
gamma_save,
|
|
gamma_configure
|
|
};
|
|
|
|
gimp_color_display_register ("Gamma", &methods);
|
|
}
|
|
|
|
gboolean
|
|
gimp_color_display_register (const char *name,
|
|
GimpColorDisplayMethods *methods)
|
|
{
|
|
ColorDisplayInfo *info;
|
|
|
|
info = g_new (ColorDisplayInfo, 1);
|
|
|
|
info->name = g_strdup (name);
|
|
info->methods = *methods;
|
|
info->refs = NULL;
|
|
|
|
if (!color_display_table)
|
|
color_display_table = g_hash_table_new (g_str_hash, g_str_equal);
|
|
|
|
if (g_hash_table_lookup (color_display_table, name))
|
|
return FALSE;
|
|
|
|
if (!methods->convert)
|
|
return FALSE;
|
|
|
|
g_hash_table_insert (color_display_table, info->name, info);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
gboolean
|
|
gimp_color_display_unregister (const char *name)
|
|
{
|
|
ColorDisplayInfo *info;
|
|
GDisplay *gdisp;
|
|
GList *node;
|
|
|
|
if ((info = g_hash_table_lookup (color_display_table, name)))
|
|
{
|
|
GSList *refs = info->refs;
|
|
|
|
while (refs)
|
|
{
|
|
gdisp = (GDisplay *) refs->data;
|
|
|
|
node = g_list_find_custom (gdisp->cd_list, name, node_name_compare);
|
|
gdisp->cd_list = g_slist_remove_link (gdisp->cd_list, node);
|
|
|
|
gdisplay_color_detach_real (gdisp, node->data, FALSE);
|
|
|
|
g_list_free_1 (node);
|
|
|
|
refs = refs->next;
|
|
}
|
|
|
|
g_slist_free (info->refs);
|
|
|
|
g_hash_table_remove (color_display_table, name);
|
|
|
|
g_free (info->name);
|
|
g_free (info);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
typedef struct _DisplayForeachData DisplayForeachData;
|
|
|
|
struct _DisplayForeachData
|
|
{
|
|
GimpCDFunc func;
|
|
gpointer user_data;
|
|
};
|
|
|
|
void
|
|
gimp_color_display_foreach (GimpCDFunc func,
|
|
gpointer user_data)
|
|
{
|
|
DisplayForeachData data;
|
|
|
|
data.func = func;
|
|
data.user_data = user_data;
|
|
|
|
g_hash_table_foreach (color_display_table, color_display_foreach, &data);
|
|
}
|
|
|
|
static void
|
|
color_display_foreach (gpointer key,
|
|
gpointer value,
|
|
gpointer user_data)
|
|
{
|
|
DisplayForeachData *data = (DisplayForeachData *) user_data;
|
|
data->func (key, data->user_data);
|
|
}
|
|
|
|
void
|
|
gdisplay_color_attach (GDisplay *gdisp,
|
|
const char *name)
|
|
{
|
|
ColorDisplayInfo *info;
|
|
ColorDisplayNode *node;
|
|
|
|
if ((info = g_hash_table_lookup (color_display_table, name)))
|
|
{
|
|
node = g_new (ColorDisplayNode, 1);
|
|
|
|
node->cd_name = g_strdup (name);
|
|
node->cd_ID = NULL;
|
|
|
|
if (!info->refs && info->methods.init)
|
|
info->methods.init ();
|
|
|
|
info->refs = g_slist_append (info->refs, gdisp);
|
|
|
|
if (info->methods.new)
|
|
node->cd_ID = info->methods.new (gdisp->gimage->base_type);
|
|
|
|
node->cd_convert = info->methods.convert;
|
|
|
|
gdisp->cd_list = g_list_append (gdisp->cd_list, name);
|
|
}
|
|
else
|
|
g_warning ("Tried to attach a nonexistant color display");
|
|
}
|
|
|
|
void
|
|
gdisplay_color_detach (GDisplay *gdisp,
|
|
const char *name)
|
|
{
|
|
GList *node;
|
|
|
|
node = g_list_find_custom (gdisp->cd_list, name, node_name_compare);
|
|
gdisplay_color_detach_real (gdisp, node->data, TRUE);
|
|
|
|
gdisp->cd_list = g_list_remove_link (gdisp->cd_list, node);
|
|
g_list_free_1 (node);
|
|
}
|
|
|
|
void
|
|
gdisplay_color_detach_all (GDisplay *gdisp)
|
|
{
|
|
GList *list = gdisp->cd_list;
|
|
|
|
while (list)
|
|
{
|
|
gdisplay_color_detach_real (gdisp, list->data, TRUE);
|
|
list = list->next;
|
|
}
|
|
|
|
g_list_free (gdisp->cd_list);
|
|
gdisp->cd_list = NULL;
|
|
}
|
|
|
|
static void
|
|
gdisplay_color_detach_real (GDisplay *gdisp,
|
|
ColorDisplayNode *node,
|
|
gboolean unref)
|
|
{
|
|
ColorDisplayInfo *info;
|
|
|
|
if ((info = g_hash_table_lookup (color_display_table, node->cd_name)))
|
|
{
|
|
if (info->methods.destroy)
|
|
info->methods.destroy (node->cd_ID);
|
|
|
|
if (unref)
|
|
info->refs = g_slist_remove (info->refs, gdisp);
|
|
|
|
if (!info->refs && info->methods.finalize)
|
|
info->methods.finalize ();
|
|
}
|
|
|
|
g_free (node->cd_name);
|
|
g_free (node);
|
|
}
|
|
|
|
static gint
|
|
node_name_compare (ColorDisplayNode *node,
|
|
const char *name)
|
|
{
|
|
return strcmp (node->cd_name, name);
|
|
}
|
|
|
|
/* The Gamma Color Display */
|
|
|
|
static gpointer
|
|
gamma_new (int type)
|
|
{
|
|
int i;
|
|
GammaContext *context = NULL;
|
|
|
|
context = g_new (GammaContext, 1);
|
|
context->gamma = 1.0;
|
|
context->lookup = g_new (guchar, 256);
|
|
context->shell = NULL;
|
|
context->spinner = NULL;
|
|
|
|
for (i = 0; i < 256; i++)
|
|
context->lookup[i] = i;
|
|
|
|
return context;
|
|
}
|
|
|
|
static void
|
|
gamma_create_lookup_table (GammaContext *context)
|
|
{
|
|
double one_over_gamma;
|
|
double ind;
|
|
int i;
|
|
|
|
if (context->gamma == 0.0)
|
|
context->gamma = 1.0;
|
|
|
|
one_over_gamma = 1.0 / context->gamma;
|
|
|
|
for (i = 0; i < 256; i++)
|
|
{
|
|
ind = (double) i / 255.0;
|
|
context->lookup[i] = (guchar) (int) (255 * pow (ind, one_over_gamma));
|
|
}
|
|
}
|
|
|
|
static void
|
|
gamma_destroy (gpointer cd_ID)
|
|
{
|
|
GammaContext *context = (GammaContext *) cd_ID;
|
|
|
|
if (context->shell)
|
|
gtk_widget_destroy (context->shell);
|
|
|
|
g_free (context->lookup);
|
|
g_free (context);
|
|
}
|
|
|
|
static void
|
|
gamma_convert (gpointer cd_ID,
|
|
guchar *buf,
|
|
int width,
|
|
int height,
|
|
int bpp)
|
|
{
|
|
int i;
|
|
guchar *lookup = ((GammaContext *) cd_ID)->lookup;
|
|
|
|
for (i = 0; i < width * height * bpp; i++)
|
|
*buf++ = lookup[*buf];
|
|
}
|
|
|
|
static void
|
|
gamma_load (gpointer cd_ID,
|
|
Parasite *state)
|
|
{
|
|
GammaContext *context = (GammaContext *) cd_ID;
|
|
|
|
#if G_BYTE_ORDER == G_BIG_ENDIAN
|
|
memcpy (&context->gamma, parasite_data (state), sizeof (double));
|
|
#else
|
|
guint32 buf[2], *data = parasite_data (state);
|
|
|
|
buf[0] = g_ntohl (data[1]);
|
|
buf[1] = g_ntohl (data[0]);
|
|
|
|
memcpy (&context->gamma, buf, sizeof (double));
|
|
#endif
|
|
|
|
gamma_create_lookup_table (context);
|
|
}
|
|
|
|
static Parasite *
|
|
gamma_save (gpointer cd_ID)
|
|
{
|
|
GammaContext *context = (GammaContext *) cd_ID;
|
|
guint32 buf[2];
|
|
|
|
memcpy (buf, &context->gamma, sizeof (double));
|
|
|
|
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
|
|
{
|
|
guint32 tmp = g_htonl (buf[0]);
|
|
buf[0] = g_htonl (buf[1]);
|
|
buf[1] = tmp;
|
|
}
|
|
#endif
|
|
|
|
return parasite_new ("Display/Gamma", PARASITE_PERSISTENT,
|
|
sizeof (double), &buf);
|
|
}
|
|
|
|
static void
|
|
gamma_configure_ok_callback (GtkWidget *widget,
|
|
gpointer data)
|
|
{
|
|
GammaContext *context = (GammaContext *) data;
|
|
|
|
context->gamma = gtk_spin_button_get_value_as_float (context->spinner);
|
|
gamma_create_lookup_table (context);
|
|
|
|
gtk_widget_hide (widget);
|
|
}
|
|
|
|
static void
|
|
gamma_configure_cancel_callback (GtkWidget *widget,
|
|
gpointer data)
|
|
{
|
|
gtk_widget_hide (widget);
|
|
}
|
|
|
|
static gint
|
|
gamma_configure_delete_callback (GtkWidget *widget,
|
|
GdkEvent *event,
|
|
gpointer data)
|
|
{
|
|
gamma_configure_cancel_callback (widget, data);
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
gamma_configure (gpointer cd_ID)
|
|
{
|
|
GammaContext *context = (GammaContext *) cd_ID;
|
|
GtkWidget *vbox;
|
|
GtkWidget *hbox;
|
|
GtkWidget *label;
|
|
GtkWidget *entry;
|
|
GtkWidget *hbbox;
|
|
GtkWidget *button;
|
|
GtkObject *adjustment;
|
|
|
|
if (!context->shell)
|
|
{
|
|
context->shell = gtk_dialog_new ();
|
|
gtk_window_set_wmclass (GTK_WINDOW (context->shell), "gamma", "Gimp");
|
|
gtk_window_set_title (GTK_WINDOW (context->shell), _("Gamma"));
|
|
|
|
gtk_signal_connect (GTK_OBJECT (context->shell), "delete_event",
|
|
GTK_SIGNAL_FUNC (gamma_configure_delete_callback),
|
|
NULL);
|
|
|
|
hbox = gtk_hbox_new (TRUE, 2);
|
|
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (context->shell)->vbox),
|
|
hbox, FALSE, FALSE, 0);
|
|
|
|
label = gtk_label_new (_("Gamma:"));
|
|
gtk_misc_set_alignment (GTK_MISC (label), 1.0, 0.5);
|
|
gtk_box_pack_start (GTK_BOX (hbox), label, TRUE, FALSE, 0);
|
|
|
|
adjustment = gtk_adjustment_new (1.0, 0.01, 10.0, 0.01, 0.1, 0.0);
|
|
context->spinner = gtk_spin_button_new (GTK_ADJUSTMENT (adjustment),
|
|
0.1, 3);
|
|
gtk_widget_set_usize (context->spinner, 100, 0);
|
|
gtk_box_pack_start (GTK_BOX (hbox), label, TRUE, FALSE, 0);
|
|
|
|
gtk_widget_show_all (hbox);
|
|
|
|
hbbox = gtk_hbutton_box_new ();
|
|
gtk_button_box_set_spacing (GTK_BUTTON_BOX (hbbox), 4);
|
|
gtk_box_pack_end (GTK_BOX (GTK_DIALOG (context->shell)->action_area),
|
|
hbbox, FALSE, FALSE, 0);
|
|
|
|
button = gtk_button_new_with_label (_("OK"));
|
|
GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
|
|
gtk_box_pack_start (GTK_BOX (hbbox), button, FALSE, FALSE, 0);
|
|
gtk_signal_connect (GTK_OBJECT (button), "clicked",
|
|
GTK_SIGNAL_FUNC (gamma_configure_ok_callback),
|
|
cd_ID);
|
|
|
|
button = gtk_button_new_with_label (_("Cancel"));
|
|
GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
|
|
gtk_box_pack_start (GTK_BOX (hbbox), button, FALSE, FALSE, 0);
|
|
gtk_signal_connect (GTK_OBJECT (button), "clicked",
|
|
GTK_SIGNAL_FUNC (gamma_configure_cancel_callback),
|
|
cd_ID);
|
|
|
|
gtk_widget_show_all (hbbox);
|
|
}
|
|
|
|
gtk_widget_show (context->shell);
|
|
}
|