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gimp/app/operations/gimpcurvesconfig.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpcurvesconfig.c
* Copyright (C) 2007 Michael Natterer <mitch@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 <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <cairo.h>
#include <gegl.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpcolor/gimpcolor.h"
#include "libgimpmath/gimpmath.h"
#include "libgimpconfig/gimpconfig.h"
#include "operations-types.h"
#include "core/gimpcurve.h"
#include "core/gimphistogram.h"
#include "gimpcurvesconfig.h"
#include "gimp-intl.h"
#include "gimp-intl.h"
enum
{
PROP_0,
PROP_CHANNEL,
PROP_CURVE
};
static void gimp_curves_config_iface_init (GimpConfigInterface *iface);
static void gimp_curves_config_finalize (GObject *object);
static void gimp_curves_config_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_curves_config_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static gboolean gimp_curves_config_serialize (GimpConfig *config,
GimpConfigWriter *writer,
gpointer data);
static gboolean gimp_curves_config_deserialize (GimpConfig *config,
GScanner *scanner,
gint nest_level,
gpointer data);
static gboolean gimp_curves_config_equal (GimpConfig *a,
GimpConfig *b);
static void gimp_curves_config_reset (GimpConfig *config);
static gboolean gimp_curves_config_copy (GimpConfig *src,
GimpConfig *dest,
GParamFlags flags);
static void gimp_curves_config_curve_dirty (GimpCurve *curve,
GimpCurvesConfig *config);
G_DEFINE_TYPE_WITH_CODE (GimpCurvesConfig, gimp_curves_config,
GIMP_TYPE_SETTINGS,
G_IMPLEMENT_INTERFACE (GIMP_TYPE_CONFIG,
gimp_curves_config_iface_init))
#define parent_class gimp_curves_config_parent_class
static void
gimp_curves_config_class_init (GimpCurvesConfigClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpViewableClass *viewable_class = GIMP_VIEWABLE_CLASS (klass);
object_class->finalize = gimp_curves_config_finalize;
object_class->set_property = gimp_curves_config_set_property;
object_class->get_property = gimp_curves_config_get_property;
viewable_class->default_icon_name = "gimp-tool-curves";
GIMP_CONFIG_PROP_ENUM (object_class, PROP_CHANNEL,
"channel",
_("Channel"),
_("The affected channel"),
GIMP_TYPE_HISTOGRAM_CHANNEL,
GIMP_HISTOGRAM_VALUE, 0);
GIMP_CONFIG_PROP_OBJECT (object_class, PROP_CURVE,
"curve",
_("Curve"),
_("Curve"),
GIMP_TYPE_CURVE,
GIMP_CONFIG_PARAM_AGGREGATE);
}
static void
gimp_curves_config_iface_init (GimpConfigInterface *iface)
{
iface->serialize = gimp_curves_config_serialize;
iface->deserialize = gimp_curves_config_deserialize;
iface->equal = gimp_curves_config_equal;
iface->reset = gimp_curves_config_reset;
iface->copy = gimp_curves_config_copy;
}
static void
gimp_curves_config_init (GimpCurvesConfig *self)
{
GimpHistogramChannel channel;
for (channel = GIMP_HISTOGRAM_VALUE;
channel <= GIMP_HISTOGRAM_ALPHA;
channel++)
{
self->curve[channel] = GIMP_CURVE (gimp_curve_new ("curves config"));
g_signal_connect_object (self->curve[channel], "dirty",
G_CALLBACK (gimp_curves_config_curve_dirty),
self, 0);
}
gimp_config_reset (GIMP_CONFIG (self));
}
static void
gimp_curves_config_finalize (GObject *object)
{
GimpCurvesConfig *self = GIMP_CURVES_CONFIG (object);
GimpHistogramChannel channel;
for (channel = GIMP_HISTOGRAM_VALUE;
channel <= GIMP_HISTOGRAM_ALPHA;
channel++)
{
g_object_unref (self->curve[channel]);
self->curve[channel] = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_curves_config_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpCurvesConfig *self = GIMP_CURVES_CONFIG (object);
switch (property_id)
{
case PROP_CHANNEL:
g_value_set_enum (value, self->channel);
break;
case PROP_CURVE:
g_value_set_object (value, self->curve[self->channel]);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_curves_config_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpCurvesConfig *self = GIMP_CURVES_CONFIG (object);
switch (property_id)
{
case PROP_CHANNEL:
self->channel = g_value_get_enum (value);
g_object_notify (object, "curve");
break;
case PROP_CURVE:
{
GimpCurve *src_curve = g_value_get_object (value);
GimpCurve *dest_curve = self->curve[self->channel];
if (src_curve && dest_curve)
{
gimp_config_copy (GIMP_CONFIG (src_curve),
GIMP_CONFIG (dest_curve), 0);
}
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static gboolean
gimp_curves_config_serialize (GimpConfig *config,
GimpConfigWriter *writer,
gpointer data)
{
GimpCurvesConfig *c_config = GIMP_CURVES_CONFIG (config);
GimpHistogramChannel channel;
GimpHistogramChannel old_channel;
gboolean success = TRUE;
if (! gimp_config_serialize_property_by_name (config, "time", writer))
return FALSE;
old_channel = c_config->channel;
for (channel = GIMP_HISTOGRAM_VALUE;
channel <= GIMP_HISTOGRAM_ALPHA;
channel++)
{
c_config->channel = channel;
/* Serialize the channel properties manually (not using
* gimp_config_serialize_properties()), so the parent class'
* "time" property doesn't end up in the config file once per
* channel. See bug #700653.
*/
success =
(gimp_config_serialize_property_by_name (config, "channel", writer) &&
gimp_config_serialize_property_by_name (config, "curve", writer));
if (! success)
break;
}
c_config->channel = old_channel;
return success;
}
static gboolean
gimp_curves_config_deserialize (GimpConfig *config,
GScanner *scanner,
gint nest_level,
gpointer data)
{
GimpCurvesConfig *c_config = GIMP_CURVES_CONFIG (config);
GimpHistogramChannel old_channel;
gboolean success = TRUE;
old_channel = c_config->channel;
success = gimp_config_deserialize_properties (config, scanner, nest_level);
g_object_set (config, "channel", old_channel, NULL);
return success;
}
static gboolean
gimp_curves_config_equal (GimpConfig *a,
GimpConfig *b)
{
GimpCurvesConfig *config_a = GIMP_CURVES_CONFIG (a);
GimpCurvesConfig *config_b = GIMP_CURVES_CONFIG (b);
GimpHistogramChannel channel;
for (channel = GIMP_HISTOGRAM_VALUE;
channel <= GIMP_HISTOGRAM_ALPHA;
channel++)
{
GimpCurve *curve_a = config_a->curve[channel];
GimpCurve *curve_b = config_b->curve[channel];
if (curve_a && curve_b)
{
if (! gimp_config_is_equal_to (GIMP_CONFIG (curve_a),
GIMP_CONFIG (curve_b)))
return FALSE;
}
else if (curve_a || curve_b)
{
return FALSE;
}
}
/* don't compare "channel" */
return TRUE;
}
static void
gimp_curves_config_reset (GimpConfig *config)
{
GimpCurvesConfig *c_config = GIMP_CURVES_CONFIG (config);
GimpHistogramChannel channel;
for (channel = GIMP_HISTOGRAM_VALUE;
channel <= GIMP_HISTOGRAM_ALPHA;
channel++)
{
c_config->channel = channel;
gimp_curves_config_reset_channel (c_config);
}
gimp_config_reset_property (G_OBJECT (config), "channel");
}
static gboolean
gimp_curves_config_copy (GimpConfig *src,
GimpConfig *dest,
GParamFlags flags)
{
GimpCurvesConfig *src_config = GIMP_CURVES_CONFIG (src);
GimpCurvesConfig *dest_config = GIMP_CURVES_CONFIG (dest);
GimpHistogramChannel channel;
for (channel = GIMP_HISTOGRAM_VALUE;
channel <= GIMP_HISTOGRAM_ALPHA;
channel++)
{
gimp_config_copy (GIMP_CONFIG (src_config->curve[channel]),
GIMP_CONFIG (dest_config->curve[channel]),
flags);
}
dest_config->channel = src_config->channel;
g_object_notify (G_OBJECT (dest), "channel");
return TRUE;
}
static void
gimp_curves_config_curve_dirty (GimpCurve *curve,
GimpCurvesConfig *config)
{
g_object_notify (G_OBJECT (config), "curve");
}
/* public functions */
GObject *
gimp_curves_config_new_spline (gint32 channel,
const gdouble *points,
gint n_points)
{
GimpCurvesConfig *config;
GimpCurve *curve;
gint i;
g_return_val_if_fail (channel >= GIMP_HISTOGRAM_VALUE &&
channel <= GIMP_HISTOGRAM_ALPHA, NULL);
g_return_val_if_fail (points != NULL, NULL);
g_return_val_if_fail (n_points >= 2 && n_points <= 1024, NULL);
config = g_object_new (GIMP_TYPE_CURVES_CONFIG, NULL);
curve = config->curve[channel];
gimp_data_freeze (GIMP_DATA (curve));
gimp_curve_set_curve_type (curve, GIMP_CURVE_SMOOTH);
gimp_curve_set_n_points (curve, n_points);
/* unset the last point */
gimp_curve_set_point (curve, curve->n_points - 1, -1.0, -1.0);
for (i = 0; i < n_points; i++)
gimp_curve_set_point (curve, i,
(gdouble) points[i * 2],
(gdouble) points[i * 2 + 1]);
gimp_data_thaw (GIMP_DATA (curve));
return G_OBJECT (config);
}
GObject *
gimp_curves_config_new_explicit (gint32 channel,
const gdouble *samples,
gint n_samples)
{
GimpCurvesConfig *config;
GimpCurve *curve;
gint i;
g_return_val_if_fail (channel >= GIMP_HISTOGRAM_VALUE &&
channel <= GIMP_HISTOGRAM_ALPHA, NULL);
g_return_val_if_fail (samples != NULL, NULL);
g_return_val_if_fail (n_samples >= 2 && n_samples <= 4096, NULL);
config = g_object_new (GIMP_TYPE_CURVES_CONFIG, NULL);
curve = config->curve[channel];
gimp_data_freeze (GIMP_DATA (curve));
gimp_curve_set_curve_type (curve, GIMP_CURVE_FREE);
gimp_curve_set_n_samples (curve, n_samples);
for (i = 0; i < n_samples; i++)
gimp_curve_set_curve (curve,
(gdouble) i / (gdouble) (n_samples - 1),
(gdouble) samples[i]);
gimp_data_thaw (GIMP_DATA (curve));
return G_OBJECT (config);
}
GObject *
gimp_curves_config_new_spline_cruft (gint32 channel,
const guint8 *points,
gint n_points)
{
GObject *config;
gdouble *d_points;
gint i;
g_return_val_if_fail (channel >= GIMP_HISTOGRAM_VALUE &&
channel <= GIMP_HISTOGRAM_ALPHA, NULL);
g_return_val_if_fail (points != NULL, NULL);
g_return_val_if_fail (n_points >= 2 && n_points <= 1024, NULL);
d_points = g_new (gdouble, 2 * n_points);
for (i = 0; i < n_points; i++)
{
d_points[i * 2] = (gdouble) points[i * 2] / 255.0;
d_points[i * 2 + 1] = (gdouble) points[i * 2 + 1] / 255.0;
}
config = gimp_curves_config_new_spline (channel, d_points, n_points);
g_free (d_points);
return config;
}
GObject *
gimp_curves_config_new_explicit_cruft (gint32 channel,
const guint8 *samples,
gint n_samples)
{
GObject *config;
gdouble *d_samples;
gint i;
g_return_val_if_fail (channel >= GIMP_HISTOGRAM_VALUE &&
channel <= GIMP_HISTOGRAM_ALPHA, NULL);
g_return_val_if_fail (samples != NULL, NULL);
g_return_val_if_fail (n_samples >= 2 && n_samples <= 4096, NULL);
d_samples = g_new (gdouble, n_samples);
for (i = 0; i < n_samples; i++)
{
d_samples[i] = (gdouble) samples[i] / 255.0;
}
config = gimp_curves_config_new_explicit (channel, d_samples, n_samples);
g_free (d_samples);
return config;
}
void
gimp_curves_config_reset_channel (GimpCurvesConfig *config)
{
g_return_if_fail (GIMP_IS_CURVES_CONFIG (config));
gimp_config_reset (GIMP_CONFIG (config->curve[config->channel]));
}
#define GIMP_CURVE_N_CRUFT_POINTS 17
gboolean
gimp_curves_config_load_cruft (GimpCurvesConfig *config,
GInputStream *input,
GError **error)
{
GDataInputStream *data_input;
gint index[5][GIMP_CURVE_N_CRUFT_POINTS];
gint value[5][GIMP_CURVE_N_CRUFT_POINTS];
gchar *line;
gsize line_len;
gint i, j;
g_return_val_if_fail (GIMP_IS_CURVES_CONFIG (config), FALSE);
g_return_val_if_fail (G_IS_INPUT_STREAM (input), FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
data_input = g_data_input_stream_new (input);
line_len = 64;
line = g_data_input_stream_read_line (data_input, &line_len,
NULL, error);
if (! line)
return FALSE;
if (strcmp (line, "# GIMP Curves File") != 0)
{
g_set_error_literal (error, GIMP_CONFIG_ERROR, GIMP_CONFIG_ERROR_PARSE,
_("not a GIMP Curves file"));
g_object_unref (data_input);
g_free (line);
return FALSE;
}
for (i = 0; i < 5; i++)
{
for (j = 0; j < GIMP_CURVE_N_CRUFT_POINTS; j++)
{
gchar *x_str = NULL;
gchar *y_str = NULL;
if (! (x_str = g_data_input_stream_read_upto (data_input, " ", -1,
NULL, NULL, error)) ||
! g_data_input_stream_read_byte (data_input, NULL, error) ||
! (y_str = g_data_input_stream_read_upto (data_input, " ", -1,
NULL, NULL, error)) ||
! g_data_input_stream_read_byte (data_input, NULL, error))
{
g_free (x_str);
g_free (y_str);
g_object_unref (data_input);
return FALSE;
}
if (sscanf (x_str, "%d", &index[i][j]) != 1 ||
sscanf (y_str, "%d", &value[i][j]) != 1)
{
g_set_error_literal (error,
GIMP_CONFIG_ERROR, GIMP_CONFIG_ERROR_PARSE,
_("Parse error, didn't find 2 integers"));
g_free (x_str);
g_free (y_str);
g_object_unref (data_input);
return FALSE;
}
g_free (x_str);
g_free (y_str);
}
}
g_object_unref (data_input);
g_object_freeze_notify (G_OBJECT (config));
for (i = 0; i < 5; i++)
{
GimpCurve *curve = config->curve[i];
gimp_data_freeze (GIMP_DATA (curve));
gimp_curve_set_curve_type (curve, GIMP_CURVE_SMOOTH);
gimp_curve_set_n_points (curve, GIMP_CURVE_N_CRUFT_POINTS);
gimp_curve_reset (curve, FALSE);
for (j = 0; j < GIMP_CURVE_N_CRUFT_POINTS; j++)
{
if (index[i][j] < 0 || value[i][j] < 0)
gimp_curve_set_point (curve, j, -1.0, -1.0);
else
gimp_curve_set_point (curve, j,
(gdouble) index[i][j] / 255.0,
(gdouble) value[i][j] / 255.0);
}
gimp_data_thaw (GIMP_DATA (curve));
}
g_object_thaw_notify (G_OBJECT (config));
return TRUE;
}
gboolean
gimp_curves_config_save_cruft (GimpCurvesConfig *config,
GOutputStream *output,
GError **error)
{
GString *string;
gint i;
g_return_val_if_fail (GIMP_IS_CURVES_CONFIG (config), FALSE);
g_return_val_if_fail (G_IS_OUTPUT_STREAM (output), FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
string = g_string_new ("# GIMP Curves File\n");
for (i = 0; i < 5; i++)
{
GimpCurve *curve = config->curve[i];
gint j;
if (curve->curve_type == GIMP_CURVE_FREE)
{
gint n_points;
for (j = 0; j < curve->n_points; j++)
{
curve->points[j].x = -1;
curve->points[j].y = -1;
}
/* pick some points from the curve and make them control
* points
*/
n_points = CLAMP (9, curve->n_points / 2, curve->n_points);
for (j = 0; j < n_points; j++)
{
gint sample = j * (curve->n_samples - 1) / (n_points - 1);
gint point = j * (curve->n_points - 1) / (n_points - 1);
curve->points[point].x = ((gdouble) sample /
(gdouble) (curve->n_samples - 1));
curve->points[point].y = curve->samples[sample];
}
}
for (j = 0; j < curve->n_points; j++)
{
/* don't use gimp_curve_get_point() becaue that doesn't
* work when the curve type is GIMP_CURVE_FREE
*/
gdouble x = curve->points[j].x;
gdouble y = curve->points[j].y;
if (x < 0.0 || y < 0.0)
{
g_string_append_printf (string, "%d %d ", -1, -1);
}
else
{
g_string_append_printf (string, "%d %d ",
(gint) (x * 255.999),
(gint) (y * 255.999));
}
}
g_string_append_printf (string, "\n");
}
if (! g_output_stream_write_all (output, string->str, string->len,
NULL, NULL, error))
{
g_prefix_error (error, _("Writing curves file failed: "));
g_string_free (string, TRUE);
return FALSE;
}
g_string_free (string, TRUE);
return TRUE;
}
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