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gimp/modules/color-selector-cmyk.c

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/* GIMP CMYK ColorSelector using littleCMS
* Copyright (C) 2006 Sven Neumann <sven@gimp.org>
*
* 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 3 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, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl.h>
#include <gtk/gtk.h>
#include "libgimpcolor/gimpcolor.h"
#include "libgimpconfig/gimpconfig.h"
#include "libgimpmodule/gimpmodule.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "libgimp/libgimp-intl.h"
/* definitions and variables */
#define COLORSEL_TYPE_CMYK (colorsel_cmyk_get_type ())
#define COLORSEL_CMYK(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), COLORSEL_TYPE_CMYK, ColorselCmyk))
#define COLORSEL_CMYK_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), COLORSEL_TYPE_CMYK, ColorselCmykClass))
#define COLORSEL_IS_CMYK(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), COLORSEL_TYPE_CMYK))
#define COLORSEL_IS_CMYK_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), COLORSEL_TYPE_CMYK))
typedef struct _ColorselCmyk ColorselCmyk;
typedef struct _ColorselCmykClass ColorselCmykClass;
struct _ColorselCmyk
{
GimpColorSelector parent_instance;
GimpColorConfig *config;
GimpColorTransform *rgb2cmyk;
GimpColorTransform *cmyk2rgb;
GimpCMYK cmyk;
GtkAdjustment *adj[4];
GtkWidget *name_label;
gboolean in_destruction;
};
struct _ColorselCmykClass
{
GimpColorSelectorClass parent_class;
};
static GType colorsel_cmyk_get_type (void);
static void colorsel_cmyk_dispose (GObject *object);
static void colorsel_cmyk_set_color (GimpColorSelector *selector,
const GimpRGB *rgb,
const GimpHSV *hsv);
static void colorsel_cmyk_set_config (GimpColorSelector *selector,
GimpColorConfig *config);
static void colorsel_cmyk_adj_update (GtkAdjustment *adj,
ColorselCmyk *module);
static void colorsel_cmyk_config_changed (ColorselCmyk *module);
static const GimpModuleInfo colorsel_cmyk_info =
{
GIMP_MODULE_ABI_VERSION,
N_("CMYK color selector (using color profile)"),
"Sven Neumann <sven@gimp.org>",
"v0.1",
"(c) 2006, released under the GPL",
"September 2006"
};
G_DEFINE_DYNAMIC_TYPE (ColorselCmyk, colorsel_cmyk,
GIMP_TYPE_COLOR_SELECTOR)
G_MODULE_EXPORT const GimpModuleInfo *
gimp_module_query (GTypeModule *module)
{
return &colorsel_cmyk_info;
}
G_MODULE_EXPORT gboolean
gimp_module_register (GTypeModule *module)
{
colorsel_cmyk_register_type (module);
return TRUE;
}
static void
colorsel_cmyk_class_init (ColorselCmykClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpColorSelectorClass *selector_class = GIMP_COLOR_SELECTOR_CLASS (klass);
object_class->dispose = colorsel_cmyk_dispose;
selector_class->name = _("CMYK");
selector_class->help_id = "gimp-colorselector-cmyk";
selector_class->icon_name = GIMP_ICON_COLOR_SELECTOR_CMYK;
selector_class->set_color = colorsel_cmyk_set_color;
selector_class->set_config = colorsel_cmyk_set_config;
gtk_widget_class_set_css_name (GTK_WIDGET_CLASS (klass), "ColorselCmyk");
}
static void
colorsel_cmyk_class_finalize (ColorselCmykClass *klass)
{
}
static void
colorsel_cmyk_init (ColorselCmyk *module)
{
GtkWidget *grid;
gint i;
static const gchar * const cmyk_labels[] =
{
/* Cyan */
N_("_C"),
/* Magenta */
N_("_M"),
/* Yellow */
N_("_Y"),
/* Key (Black) */
N_("_K")
};
static const gchar * const cmyk_tips[] =
{
N_("Cyan"),
N_("Magenta"),
N_("Yellow"),
N_("Black")
};
module->config = NULL;
module->rgb2cmyk = NULL;
module->cmyk2rgb = NULL;
gtk_box_set_spacing (GTK_BOX (module), 6);
grid = gtk_grid_new ();
gtk_grid_set_row_spacing (GTK_GRID (grid), 1);
gtk_grid_set_column_spacing (GTK_GRID (grid), 2);
gtk_box_pack_start (GTK_BOX (module), grid, FALSE, FALSE, 0);
gtk_widget_show (grid);
for (i = 0; i < 4; i++)
{
module->adj[i] = gimp_scale_entry_new (GTK_GRID (grid), 1, i,
gettext (cmyk_labels[i]),
-1, -1,
0.0,
0.0, 100.0,
1.0, 10.0,
0,
TRUE, 0.0, 0.0,
gettext (cmyk_tips[i]),
NULL);
g_signal_connect (module->adj[i], "value-changed",
G_CALLBACK (colorsel_cmyk_adj_update),
module);
}
module->name_label = gtk_label_new (NULL);
gtk_label_set_xalign (GTK_LABEL (module->name_label), 0.0);
gtk_label_set_ellipsize (GTK_LABEL (module->name_label), PANGO_ELLIPSIZE_END);
gimp_label_set_attributes (GTK_LABEL (module->name_label),
PANGO_ATTR_SCALE, PANGO_SCALE_SMALL,
-1);
gtk_box_pack_start (GTK_BOX (module), module->name_label, FALSE, FALSE, 0);
gtk_widget_show (module->name_label);
}
static void
colorsel_cmyk_dispose (GObject *object)
{
ColorselCmyk *module = COLORSEL_CMYK (object);
module->in_destruction = TRUE;
colorsel_cmyk_set_config (GIMP_COLOR_SELECTOR (object), NULL);
G_OBJECT_CLASS (colorsel_cmyk_parent_class)->dispose (object);
}
static void
colorsel_cmyk_set_color (GimpColorSelector *selector,
const GimpRGB *rgb,
const GimpHSV *hsv)
{
ColorselCmyk *module = COLORSEL_CMYK (selector);
gdouble values[4];
gint i;
if (module->rgb2cmyk)
{
gdouble rgb_values[3];
gdouble cmyk_values[4];
rgb_values[0] = rgb->r;
rgb_values[1] = rgb->g;
rgb_values[2] = rgb->b;
gimp_color_transform_process_pixels (module->rgb2cmyk,
babl_format ("R'G'B' double"),
rgb_values,
babl_format ("CMYK double"),
cmyk_values,
1);
module->cmyk.c = cmyk_values[0] / 100.0;
module->cmyk.m = cmyk_values[1] / 100.0;
module->cmyk.y = cmyk_values[2] / 100.0;
module->cmyk.k = cmyk_values[3] / 100.0;
}
else
{
gimp_rgb_to_cmyk (rgb, 1.0, &module->cmyk);
}
values[0] = module->cmyk.c * 100.0;
values[1] = module->cmyk.m * 100.0;
values[2] = module->cmyk.y * 100.0;
values[3] = module->cmyk.k * 100.0;
for (i = 0; i < 4; i++)
{
g_signal_handlers_block_by_func (module->adj[i],
colorsel_cmyk_adj_update,
module);
gtk_adjustment_set_value (module->adj[i], values[i]);
g_signal_handlers_unblock_by_func (module->adj[i],
colorsel_cmyk_adj_update,
module);
}
}
static void
colorsel_cmyk_set_config (GimpColorSelector *selector,
GimpColorConfig *config)
{
ColorselCmyk *module = COLORSEL_CMYK (selector);
if (config != module->config)
{
if (module->config)
g_signal_handlers_disconnect_by_func (module->config,
colorsel_cmyk_config_changed,
module);
g_set_object (&module->config, config);
if (module->config)
g_signal_connect_swapped (module->config, "notify",
G_CALLBACK (colorsel_cmyk_config_changed),
module);
colorsel_cmyk_config_changed (module);
}
}
static void
colorsel_cmyk_adj_update (GtkAdjustment *adj,
ColorselCmyk *module)
{
GimpColorSelector *selector = GIMP_COLOR_SELECTOR (module);
gint i;
gdouble value;
for (i = 0; i < 4; i++)
if (module->adj[i] == adj)
break;
value = gtk_adjustment_get_value (adj) / 100.0;
switch (i)
{
case 0:
module->cmyk.c = value;
break;
case 1:
module->cmyk.m = value;
break;
case 2:
module->cmyk.y = value;
break;
case 3:
module->cmyk.k = value;
break;
default:
return;
}
if (module->cmyk2rgb)
{
gdouble cmyk_values[4];
gdouble rgb_values[3];
cmyk_values[0] = module->cmyk.c * 100.0;
cmyk_values[1] = module->cmyk.m * 100.0;
cmyk_values[2] = module->cmyk.y * 100.0;
cmyk_values[3] = module->cmyk.k * 100.0;
gimp_color_transform_process_pixels (module->cmyk2rgb,
babl_format ("CMYK double"),
cmyk_values,
babl_format ("R'G'B' double"),
rgb_values,
1);
selector->rgb.r = rgb_values[0];
selector->rgb.g = rgb_values[1];
selector->rgb.b = rgb_values[2];
}
else
{
gimp_cmyk_to_rgb (&module->cmyk, &selector->rgb);
}
gimp_rgb_to_hsv (&selector->rgb, &selector->hsv);
gimp_color_selector_emit_color_changed (selector);
}
static void
colorsel_cmyk_config_changed (ColorselCmyk *module)
{
GimpColorSelector *selector = GIMP_COLOR_SELECTOR (module);
GimpColorConfig *config = module->config;
GimpColorTransformFlags flags = 0;
GimpColorProfile *rgb_profile = NULL;
GimpColorProfile *cmyk_profile = NULL;
gchar *text;
if (module->rgb2cmyk)
{
g_object_unref (module->rgb2cmyk);
module->rgb2cmyk = NULL;
}
if (module->cmyk2rgb)
{
g_object_unref (module->cmyk2rgb);
module->cmyk2rgb = NULL;
}
gtk_label_set_text (GTK_LABEL (module->name_label), _("Profile: (none)"));
gimp_help_set_help_data (module->name_label, NULL, NULL);
if (! config)
goto out;
cmyk_profile = gimp_color_config_get_cmyk_color_profile (config, NULL);
if (! cmyk_profile)
goto out;
rgb_profile = gimp_color_profile_new_rgb_srgb ();
text = g_strdup_printf (_("Profile: %s"),
gimp_color_profile_get_label (cmyk_profile));
gtk_label_set_text (GTK_LABEL (module->name_label), text);
g_free (text);
gimp_help_set_help_data (module->name_label,
gimp_color_profile_get_summary (cmyk_profile),
NULL);
flags |= GIMP_COLOR_TRANSFORM_FLAGS_NOOPTIMIZE;
flags |= GIMP_COLOR_TRANSFORM_FLAGS_BLACK_POINT_COMPENSATION;
module->rgb2cmyk = gimp_color_transform_new (rgb_profile,
babl_format ("R'G'B' double"),
cmyk_profile,
babl_format ("CMYK double"),
GIMP_COLOR_RENDERING_INTENT_PERCEPTUAL,
flags);
module->cmyk2rgb = gimp_color_transform_new (cmyk_profile,
babl_format ("CMYK double"),
rgb_profile,
babl_format ("R'G'B' double"),
GIMP_COLOR_RENDERING_INTENT_PERCEPTUAL,
flags);
out:
if (rgb_profile)
g_object_unref (rgb_profile);
if (cmyk_profile)
g_object_unref (cmyk_profile);
if (! module->in_destruction)
colorsel_cmyk_set_color (selector, &selector->rgb, &selector->hsv);
}
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