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app: add GimpOperationEqualize and port equalize to it

This commit is contained in:
Michael Natterer 2012-03-25 00:12:15 +01:00
parent 8d5471502e
commit cf86aeceb3
9 changed files with 296 additions and 138 deletions
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2
app/base/Makefile.am
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@ -30,8 +30,6 @@ libappbase_a_SOURCES = \
gimplut.h \
hue-saturation.c \
hue-saturation.h \
lut-funcs.c \
lut-funcs.h \
pixel-processor.c \
pixel-processor.h \
pixel-region.c \

101
app/base/lut-funcs.c
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@ -1,101 +0,0 @@
/* GIMP - The GNU 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 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 <glib-object.h>
#include "libgimpmath/gimpmath.h"
#include "core/core-types.h"
#include "core/gimphistogram.h"
#include "gimplut.h"
#include "lut-funcs.h"
/* --------------- equalize ------------- */
typedef struct
{
GimpHistogram *histogram;
gint part[5][256];
} hist_lut_struct;
static gfloat
equalize_lut_func (hist_lut_struct *hlut,
gint nchannels,
gint channel,
gfloat value)
{
gint j;
/* don't equalize the alpha channel */
if ((nchannels == 2 || nchannels == 4) && channel == nchannels - 1)
return value;
j = RINT (CLAMP (value * 255.0, 0, 255));
return hlut->part[channel][j] / 255.;
}
static void
equalize_lut_setup (GimpLut *lut,
GimpHistogram *hist,
gint n_channels)
{
gint i, k;
hist_lut_struct hlut;
gdouble pixels;
g_return_if_fail (lut != NULL);
g_return_if_fail (hist != NULL);
/* Find partition points */
pixels = gimp_histogram_get_count (hist, GIMP_HISTOGRAM_VALUE, 0, 255);
for (k = 0; k < n_channels; k++)
{
gdouble sum = 0;
for (i = 0; i < 256; i++)
{
gdouble histi = gimp_histogram_get_channel (hist, k, i);
sum += histi;
hlut.part[k][i] = RINT (sum * 255. / pixels);
}
}
gimp_lut_setup (lut, (GimpLutFunc) equalize_lut_func, &hlut, n_channels);
}
GimpLut *
equalize_lut_new (GimpHistogram *histogram,
gint n_channels)
{
GimpLut *lut;
g_return_val_if_fail (histogram != NULL, NULL);
lut = gimp_lut_new ();
equalize_lut_setup (lut, histogram, n_channels);
return lut;
}

26
app/base/lut-funcs.h
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@ -1,26 +0,0 @@
/* GIMP - The GNU 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 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/>.
*/
#ifndef __LUT_FUNCS_H__
#define __LUT_FUNCS_H__
GimpLut * equalize_lut_new (GimpHistogram *histogram,
gint n_channels);
#endif /* __LUT_FUNCS_H__ */

22
app/core/gimpdrawable-equalize.c
View File

@ -21,13 +21,10 @@
#include "core-types.h"
#include "base/gimplut.h"
#include "base/lut-funcs.h"
#include "gimpdrawable.h"
#include "gimpdrawable-equalize.h"
#include "gimpdrawable-histogram.h"
#include "gimpdrawable-process.h"
#include "gimpdrawable-operation.h"
#include "gimphistogram.h"
#include "gimp-intl.h"
@ -38,7 +35,7 @@ gimp_drawable_equalize (GimpDrawable *drawable,
gboolean mask_only)
{
GimpHistogram *hist;
GimpLut *lut;
GeglNode *equalize;
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)));
@ -46,9 +43,16 @@ gimp_drawable_equalize (GimpDrawable *drawable,
hist = gimp_histogram_new ();
gimp_drawable_calculate_histogram (drawable, hist);
lut = equalize_lut_new (hist, gimp_drawable_bytes (drawable));
gimp_histogram_unref (hist);
equalize = gegl_node_new_child (NULL,
"operation", "gimp:equalize",
"histogram", hist,
NULL);
gimp_drawable_process_lut (drawable, NULL, C_("undo-type", "Equalize"), lut);
gimp_lut_free (lut);
gimp_drawable_apply_operation (drawable, NULL,
C_("undo-type", "Equalize"),
equalize, TRUE);
g_object_unref (equalize);
gimp_histogram_unref (hist);
}

2
app/gegl/Makefile.am
View File

@ -67,6 +67,8 @@ libappgegl_a_sources = \
gimpoperationcurves.h \
gimpoperationdesaturate.c \
gimpoperationdesaturate.h \
gimpoperationequalize.c \
gimpoperationequalize.h \
gimpoperationhuesaturation.c \
gimpoperationhuesaturation.h \
gimpoperationlevels.c \

1
app/gegl/gimp-gegl-types.h
View File

@ -40,6 +40,7 @@ typedef struct _GimpOperationColorBalance GimpOperationColorBalance;
typedef struct _GimpOperationColorize GimpOperationColorize;
typedef struct _GimpOperationCurves GimpOperationCurves;
typedef struct _GimpOperationDesaturate GimpOperationDesaturate;
typedef struct _GimpOperationEqualize GimpOperationEqualize;
typedef struct _GimpOperationHueSaturation GimpOperationHueSaturation;
typedef struct _GimpOperationLevels GimpOperationLevels;
typedef struct _GimpOperationPosterize GimpOperationPosterize;

2
app/gegl/gimp-gegl.c
View File

@ -41,6 +41,7 @@
#include "gimpoperationcolorize.h"
#include "gimpoperationcurves.h"
#include "gimpoperationdesaturate.h"
#include "gimpoperationequalize.h"
#include "gimpoperationhuesaturation.h"
#include "gimpoperationlevels.h"
#include "gimpoperationposterize.h"
@ -127,6 +128,7 @@ gimp_gegl_init (Gimp *gimp)
g_type_class_ref (GIMP_TYPE_OPERATION_COLORIZE);
g_type_class_ref (GIMP_TYPE_OPERATION_CURVES);
g_type_class_ref (GIMP_TYPE_OPERATION_DESATURATE);
g_type_class_ref (GIMP_TYPE_OPERATION_EQUALIZE);
g_type_class_ref (GIMP_TYPE_OPERATION_HUE_SATURATION);
g_type_class_ref (GIMP_TYPE_OPERATION_LEVELS);
g_type_class_ref (GIMP_TYPE_OPERATION_POSTERIZE);

223
app/gegl/gimpoperationequalize.c Normal file
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@ -0,0 +1,223 @@
/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpoperationequalize.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 "libgimpcolor/gimpcolor.h"
#include "libgimpmath/gimpmath.h"
#include "gimp-gegl-types.h"
#include "core/gimphistogram.h"
#include "gimpoperationequalize.h"
enum
{
PROP_0,
PROP_HISTOGRAM
};
static void gimp_operation_equalize_finalize (GObject *object);
static void gimp_operation_equalize_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_operation_equalize_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static gboolean gimp_operation_equalize_process (GeglOperation *operation,
void *in_buf,
void *out_buf,
glong samples,
const GeglRectangle *roi);
G_DEFINE_TYPE (GimpOperationEqualize, gimp_operation_equalize,
GIMP_TYPE_OPERATION_POINT_FILTER)
#define parent_class gimp_operation_equalize_parent_class
static void
gimp_operation_equalize_class_init (GimpOperationEqualizeClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GeglOperationClass *operation_class = GEGL_OPERATION_CLASS (klass);
GeglOperationPointFilterClass *point_class = GEGL_OPERATION_POINT_FILTER_CLASS (klass);
object_class->finalize = gimp_operation_equalize_finalize;
object_class->set_property = gimp_operation_equalize_set_property;
object_class->get_property = gimp_operation_equalize_get_property;
operation_class->name = "gimp:equalize";
operation_class->categories = "color";
operation_class->description = "GIMP Equalize operation";
point_class->process = gimp_operation_equalize_process;
g_object_class_install_property (object_class, PROP_HISTOGRAM,
g_param_spec_pointer ("histogram",
"Histogram",
"The histogram",
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY));
}
static void
gimp_operation_equalize_init (GimpOperationEqualize *self)
{
}
static void
gimp_operation_equalize_finalize (GObject *object)
{
GimpOperationEqualize *self = GIMP_OPERATION_EQUALIZE (object);
if (self->histogram)
{
gimp_histogram_unref (self->histogram);
self->histogram = NULL;
}
}
static void
gimp_operation_equalize_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpOperationEqualize *self = GIMP_OPERATION_EQUALIZE (object);
switch (property_id)
{
case PROP_HISTOGRAM:
g_value_set_pointer (value, self->histogram);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_operation_equalize_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpOperationEqualize *self = GIMP_OPERATION_EQUALIZE (object);
switch (property_id)
{
case PROP_HISTOGRAM:
if (self->histogram)
gimp_histogram_unref (self->histogram);
self->histogram = g_value_get_pointer (value);
if (self->histogram)
{
gdouble pixels;
gint max;
gint k;
gimp_histogram_ref (self->histogram);
pixels = gimp_histogram_get_count (self->histogram,
GIMP_HISTOGRAM_VALUE, 0, 255);
if (gimp_histogram_n_channels (self->histogram) == 1 ||
gimp_histogram_n_channels (self->histogram) == 2)
max = 1;
else
max = 3;
for (k = 0; k < 3; k++)
{
gdouble sum = 0;
gint i;
for (i = 0; i < 256; i++)
{
gdouble histi;
histi = gimp_histogram_get_channel (self->histogram, k, i);
sum += histi;
self->part[k][i] = sum / pixels;
if (max == 1)
{
self->part[1][i] = self->part[0][i];
self->part[2][i] = self->part[0][i];
}
}
}
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static inline float
gimp_operation_equalize_map (GimpOperationEqualize *self,
gint component,
gfloat value)
{
gint index = (gint) CLAMP (value * 255.0, 0, 255);
return self->part[component][index];
}
static gboolean
gimp_operation_equalize_process (GeglOperation *operation,
void *in_buf,
void *out_buf,
glong samples,
const GeglRectangle *roi)
{
GimpOperationEqualize *self = GIMP_OPERATION_EQUALIZE (operation);
gfloat *src = in_buf;
gfloat *dest = out_buf;
while (samples--)
{
dest[RED] = gimp_operation_equalize_map (self, RED, src[RED]);
dest[GREEN] = gimp_operation_equalize_map (self, GREEN, src[GREEN]);
dest[BLUE] = gimp_operation_equalize_map (self, BLUE, src[BLUE]);
dest[ALPHA] = src[ALPHA];
src += 4;
dest += 4;
}
return TRUE;
}

55
app/gegl/gimpoperationequalize.h Normal file
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@ -0,0 +1,55 @@
/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpoperationequalize.h
* Copyright (C) 2012 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/>.
*/
#ifndef __GIMP_OPERATION_EQUALIZE_H__
#define __GIMP_OPERATION_EQUALIZE_H__
#include "gimpoperationpointfilter.h"
#define GIMP_TYPE_OPERATION_EQUALIZE (gimp_operation_equalize_get_type ())
#define GIMP_OPERATION_EQUALIZE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_OPERATION_EQUALIZE, GimpOperationEqualize))
#define GIMP_OPERATION_EQUALIZE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_OPERATION_EQUALIZE, GimpOperationEqualizeClass))
#define GIMP_IS_OPERATION_EQUALIZE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_OPERATION_EQUALIZE))
#define GIMP_IS_OPERATION_EQUALIZE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_OPERATION_EQUALIZE))
#define GIMP_OPERATION_EQUALIZE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_OPERATION_EQUALIZE, GimpOperationEqualizeClass))
typedef struct _GimpOperationEqualizeClass GimpOperationEqualizeClass;
struct _GimpOperationEqualize
{
GimpOperationPointFilter parent_instance;
GimpHistogram *histogram;
gfloat part[5][256];
};
struct _GimpOperationEqualizeClass
{
GimpOperationPointFilterClass parent_class;
};
GType gimp_operation_equalize_get_type (void) G_GNUC_CONST;
#endif /* __GIMP_OPERATION_EQUALIZE_H__ */