448 lines
15 KiB
C
448 lines
15 KiB
C
|
/* PIKA - Photo and Image Kooker Application
|
||
|
|
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
|
||
|
|
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
|
||
|
|
*
|
||
|
|
* Original copyright, applying to most contents (license remains unchanged):
|
||
|
|
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
|
||
|
|
*
|
||
|
|
* pikaoperationshrink.c
|
||
|
|
* 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 <https://www.gnu.org/licenses/>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "config.h"
|
||
|
|
|
||
|
|
#include <cairo.h>
|
||
|
|
#include <gegl.h>
|
||
|
|
#include <gdk-pixbuf/gdk-pixbuf.h>
|
||
|
|
|
||
|
|
#include "libpikacolor/pikacolor.h"
|
||
|
|
#include "libpikamath/pikamath.h"
|
||
|
|
|
||
|
|
#include "operations-types.h"
|
||
|
|
|
||
|
|
#include "pikaoperationshrink.h"
|
||
|
|
|
||
|
|
|
||
|
|
enum
|
||
|
|
{
|
||
|
|
PROP_0,
|
||
|
|
PROP_RADIUS_X,
|
||
|
|
PROP_RADIUS_Y,
|
||
|
|
PROP_EDGE_LOCK
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
static void pika_operation_shrink_get_property (GObject *object,
|
||
|
|
guint property_id,
|
||
|
|
GValue *value,
|
||
|
|
GParamSpec *pspec);
|
||
|
|
static void pika_operation_shrink_set_property (GObject *object,
|
||
|
|
guint property_id,
|
||
|
|
const GValue *value,
|
||
|
|
GParamSpec *pspec);
|
||
|
|
|
||
|
|
static void pika_operation_shrink_prepare (GeglOperation *operation);
|
||
|
|
static GeglRectangle
|
||
|
|
pika_operation_shrink_get_required_for_output (GeglOperation *self,
|
||
|
|
const gchar *input_pad,
|
||
|
|
const GeglRectangle *roi);
|
||
|
|
static GeglRectangle
|
||
|
|
pika_operation_shrink_get_cached_region (GeglOperation *self,
|
||
|
|
const GeglRectangle *roi);
|
||
|
|
|
||
|
|
static gboolean pika_operation_shrink_process (GeglOperation *operation,
|
||
|
|
GeglBuffer *input,
|
||
|
|
GeglBuffer *output,
|
||
|
|
const GeglRectangle *roi,
|
||
|
|
gint level);
|
||
|
|
|
||
|
|
|
||
|
|
G_DEFINE_TYPE (PikaOperationShrink, pika_operation_shrink,
|
||
|
|
GEGL_TYPE_OPERATION_FILTER)
|
||
|
|
|
||
|
|
#define parent_class pika_operation_shrink_parent_class
|
||
|
|
|
||
|
|
|
||
|
|
static void
|
||
|
|
pika_operation_shrink_class_init (PikaOperationShrinkClass *klass)
|
||
|
|
{
|
||
|
|
GObjectClass *object_class = G_OBJECT_CLASS (klass);
|
||
|
|
GeglOperationClass *operation_class = GEGL_OPERATION_CLASS (klass);
|
||
|
|
GeglOperationFilterClass *filter_class = GEGL_OPERATION_FILTER_CLASS (klass);
|
||
|
|
|
||
|
|
object_class->set_property = pika_operation_shrink_set_property;
|
||
|
|
object_class->get_property = pika_operation_shrink_get_property;
|
||
|
|
|
||
|
|
gegl_operation_class_set_keys (operation_class,
|
||
|
|
"name", "pika:shrink",
|
||
|
|
"categories", "pika",
|
||
|
|
"description", "PIKA Shrink operation",
|
||
|
|
NULL);
|
||
|
|
|
||
|
|
operation_class->prepare = pika_operation_shrink_prepare;
|
||
|
|
operation_class->get_required_for_output = pika_operation_shrink_get_required_for_output;
|
||
|
|
operation_class->get_cached_region = pika_operation_shrink_get_cached_region;
|
||
|
|
operation_class->threaded = FALSE;
|
||
|
|
|
||
|
|
filter_class->process = pika_operation_shrink_process;
|
||
|
|
|
||
|
|
g_object_class_install_property (object_class, PROP_RADIUS_X,
|
||
|
|
g_param_spec_int ("radius-x",
|
||
|
|
"Radius X",
|
||
|
|
"Shrink radius in X diection",
|
||
|
|
1, 2342, 1,
|
||
|
|
G_PARAM_READWRITE |
|
||
|
|
G_PARAM_CONSTRUCT));
|
||
|
|
|
||
|
|
g_object_class_install_property (object_class, PROP_RADIUS_Y,
|
||
|
|
g_param_spec_int ("radius-y",
|
||
|
|
"Radius Y",
|
||
|
|
"Shrink radius in Y diection",
|
||
|
|
1, 2342, 1,
|
||
|
|
G_PARAM_READWRITE |
|
||
|
|
G_PARAM_CONSTRUCT));
|
||
|
|
|
||
|
|
g_object_class_install_property (object_class, PROP_EDGE_LOCK,
|
||
|
|
g_param_spec_boolean ("edge-lock",
|
||
|
|
"Edge Lock",
|
||
|
|
"Shrink from border",
|
||
|
|
FALSE,
|
||
|
|
G_PARAM_READWRITE |
|
||
|
|
G_PARAM_CONSTRUCT));
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
pika_operation_shrink_init (PikaOperationShrink *self)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
pika_operation_shrink_get_property (GObject *object,
|
||
|
|
guint property_id,
|
||
|
|
GValue *value,
|
||
|
|
GParamSpec *pspec)
|
||
|
|
{
|
||
|
|
PikaOperationShrink *self = PIKA_OPERATION_SHRINK (object);
|
||
|
|
|
||
|
|
switch (property_id)
|
||
|
|
{
|
||
|
|
case PROP_RADIUS_X:
|
||
|
|
g_value_set_int (value, self->radius_x);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case PROP_RADIUS_Y:
|
||
|
|
g_value_set_int (value, self->radius_y);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case PROP_EDGE_LOCK:
|
||
|
|
g_value_set_boolean (value, self->edge_lock);
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
pika_operation_shrink_set_property (GObject *object,
|
||
|
|
guint property_id,
|
||
|
|
const GValue *value,
|
||
|
|
GParamSpec *pspec)
|
||
|
|
{
|
||
|
|
PikaOperationShrink *self = PIKA_OPERATION_SHRINK (object);
|
||
|
|
|
||
|
|
switch (property_id)
|
||
|
|
{
|
||
|
|
case PROP_RADIUS_X:
|
||
|
|
self->radius_x = g_value_get_int (value);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case PROP_RADIUS_Y:
|
||
|
|
self->radius_y = g_value_get_int (value);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case PROP_EDGE_LOCK:
|
||
|
|
self->edge_lock = g_value_get_boolean (value);
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
pika_operation_shrink_prepare (GeglOperation *operation)
|
||
|
|
{
|
||
|
|
const Babl *space = gegl_operation_get_source_space (operation, "input");
|
||
|
|
gegl_operation_set_format (operation, "input", babl_format_with_space ("Y float", space));
|
||
|
|
gegl_operation_set_format (operation, "output", babl_format_with_space ("Y float", space));
|
||
|
|
}
|
||
|
|
|
||
|
|
static GeglRectangle
|
||
|
|
pika_operation_shrink_get_required_for_output (GeglOperation *self,
|
||
|
|
const gchar *input_pad,
|
||
|
|
const GeglRectangle *roi)
|
||
|
|
{
|
||
|
|
return *gegl_operation_source_get_bounding_box (self, "input");
|
||
|
|
}
|
||
|
|
|
||
|
|
static GeglRectangle
|
||
|
|
pika_operation_shrink_get_cached_region (GeglOperation *self,
|
||
|
|
const GeglRectangle *roi)
|
||
|
|
{
|
||
|
|
return *gegl_operation_source_get_bounding_box (self, "input");
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
compute_border (gint16 *circ,
|
||
|
|
guint16 xradius,
|
||
|
|
guint16 yradius)
|
||
|
|
{
|
||
|
|
gint32 i;
|
||
|
|
gint32 diameter = xradius * 2 + 1;
|
||
|
|
gdouble tmp;
|
||
|
|
|
||
|
|
for (i = 0; i < diameter; i++)
|
||
|
|
{
|
||
|
|
if (i > xradius)
|
||
|
|
tmp = (i - xradius) - 0.5;
|
||
|
|
else if (i < xradius)
|
||
|
|
tmp = (xradius - i) - 0.5;
|
||
|
|
else
|
||
|
|
tmp = 0.0;
|
||
|
|
|
||
|
|
circ[i] = RINT (yradius /
|
||
|
|
(gdouble) xradius * sqrt (SQR (xradius) - SQR (tmp)));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void
|
||
|
|
rotate_pointers (gfloat **p,
|
||
|
|
guint32 n)
|
||
|
|
{
|
||
|
|
guint32 i;
|
||
|
|
gfloat *tmp;
|
||
|
|
|
||
|
|
tmp = p[0];
|
||
|
|
|
||
|
|
for (i = 0; i < n - 1; i++)
|
||
|
|
p[i] = p[i + 1];
|
||
|
|
|
||
|
|
p[i] = tmp;
|
||
|
|
}
|
||
|
|
|
||
|
|
static gboolean
|
||
|
|
pika_operation_shrink_process (GeglOperation *operation,
|
||
|
|
GeglBuffer *input,
|
||
|
|
GeglBuffer *output,
|
||
|
|
const GeglRectangle *roi,
|
||
|
|
gint level)
|
||
|
|
{
|
||
|
|
/* Pretty much the same as fatten_region only different.
|
||
|
|
* Blame all bugs in this function on jaycox@gimp.org
|
||
|
|
*
|
||
|
|
* If edge_lock is true we assume that pixels outside the region we
|
||
|
|
* are passed are identical to the edge pixels. If edge_lock is
|
||
|
|
* false, we assume that pixels outside the region are 0
|
||
|
|
*/
|
||
|
|
PikaOperationShrink *self = PIKA_OPERATION_SHRINK (operation);
|
||
|
|
const Babl *input_format = babl_format ("Y float");
|
||
|
|
const Babl *output_format = babl_format ("Y float");
|
||
|
|
gint32 i, j, x, y;
|
||
|
|
gfloat **buf; /* caches the the region's pixels */
|
||
|
|
gfloat *out; /* holds the new scan line we are computing */
|
||
|
|
gfloat **max; /* caches the smallest values for each column */
|
||
|
|
gint16 *circ; /* holds the y coords of the filter's mask */
|
||
|
|
gfloat last_max;
|
||
|
|
gint16 last_index;
|
||
|
|
gfloat *buffer;
|
||
|
|
gint buffer_size;
|
||
|
|
|
||
|
|
max = g_new (gfloat *, roi->width + 2 * self->radius_x);
|
||
|
|
buf = g_new (gfloat *, self->radius_y + 1);
|
||
|
|
|
||
|
|
for (i = 0; i < self->radius_y + 1; i++)
|
||
|
|
buf[i] = g_new (gfloat, roi->width);
|
||
|
|
|
||
|
|
buffer_size = (roi->width+ 2 * self->radius_x + 1) * (self->radius_y + 1);
|
||
|
|
buffer = g_new (gfloat, buffer_size);
|
||
|
|
|
||
|
|
if (self->edge_lock)
|
||
|
|
{
|
||
|
|
for (i = 0; i < buffer_size; i++)
|
||
|
|
buffer[i] = 1.0;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
memset (buffer, 0, buffer_size * sizeof (gfloat));
|
||
|
|
}
|
||
|
|
|
||
|
|
for (i = 0; i < roi->width + 2 * self->radius_x; i++)
|
||
|
|
{
|
||
|
|
if (i < self->radius_x)
|
||
|
|
{
|
||
|
|
if (self->edge_lock)
|
||
|
|
max[i] = buffer;
|
||
|
|
else
|
||
|
|
max[i] = &buffer[(self->radius_y + 1) * (roi->width + self->radius_x)];
|
||
|
|
}
|
||
|
|
else if (i < roi->width + self->radius_x)
|
||
|
|
{
|
||
|
|
max[i] = &buffer[(self->radius_y + 1) * (i - self->radius_x)];
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
if (self->edge_lock)
|
||
|
|
max[i] = &buffer[(self->radius_y + 1) * (roi->width + self->radius_x - 1)];
|
||
|
|
else
|
||
|
|
max[i] = &buffer[(self->radius_y + 1) * (roi->width + self->radius_x)];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (! self->edge_lock)
|
||
|
|
for (j = 0 ; j < self->radius_y + 1; j++)
|
||
|
|
max[0][j] = 0.0;
|
||
|
|
|
||
|
|
/* offset the max pointer by self->radius_x so the range of the
|
||
|
|
* array is [-self->radius_x] to [roi->width + self->radius_x]
|
||
|
|
*/
|
||
|
|
max += self->radius_x;
|
||
|
|
|
||
|
|
out = g_new (gfloat, roi->width);
|
||
|
|
|
||
|
|
circ = g_new (gint16, 2 * self->radius_x + 1);
|
||
|
|
compute_border (circ, self->radius_x, self->radius_y);
|
||
|
|
|
||
|
|
/* offset the circ pointer by self->radius_x so the range of the
|
||
|
|
* array is [-self->radius_x] to [self->radius_x]
|
||
|
|
*/
|
||
|
|
circ += self->radius_x;
|
||
|
|
|
||
|
|
for (i = 0; i < self->radius_y && i < roi->height; i++) /* load top of image */
|
||
|
|
gegl_buffer_get (input,
|
||
|
|
GEGL_RECTANGLE (roi->x, roi->y + i,
|
||
|
|
roi->width, 1),
|
||
|
|
1.0, input_format, buf[i + 1],
|
||
|
|
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
|
||
|
|
|
||
|
|
if (self->edge_lock)
|
||
|
|
memcpy (buf[0], buf[1], roi->width * sizeof (gfloat));
|
||
|
|
else
|
||
|
|
memset (buf[0], 0, roi->width * sizeof (gfloat));
|
||
|
|
|
||
|
|
for (x = 0; x < roi->width; x++) /* set up max for top of image */
|
||
|
|
{
|
||
|
|
max[x][0] = buf[0][x];
|
||
|
|
|
||
|
|
for (j = 1; j < self->radius_y + 1; j++)
|
||
|
|
max[x][j] = MIN (buf[j][x], max[x][j - 1]);
|
||
|
|
}
|
||
|
|
|
||
|
|
for (y = 0; y < roi->height; y++)
|
||
|
|
{
|
||
|
|
rotate_pointers (buf, self->radius_y + 1);
|
||
|
|
|
||
|
|
if (y < roi->height - self->radius_y)
|
||
|
|
gegl_buffer_get (input,
|
||
|
|
GEGL_RECTANGLE (roi->x, roi->y + y + self->radius_y,
|
||
|
|
roi->width, 1),
|
||
|
|
1.0, input_format, buf[self->radius_y],
|
||
|
|
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
|
||
|
|
|
||
|
|
else if (self->edge_lock)
|
||
|
|
memcpy (buf[self->radius_y], buf[self->radius_y - 1],
|
||
|
|
roi->width * sizeof (gfloat));
|
||
|
|
else
|
||
|
|
memset (buf[self->radius_y], 0, roi->width * sizeof (gfloat));
|
||
|
|
|
||
|
|
for (x = 0 ; x < roi->width; x++) /* update max array */
|
||
|
|
{
|
||
|
|
for (i = self->radius_y; i > 0; i--)
|
||
|
|
max[x][i] = MIN (MIN (max[x][i - 1], buf[i - 1][x]), buf[i][x]);
|
||
|
|
|
||
|
|
max[x][0] = buf[0][x];
|
||
|
|
}
|
||
|
|
|
||
|
|
last_max = max[0][circ[-1]];
|
||
|
|
last_index = 0;
|
||
|
|
|
||
|
|
for (x = 0 ; x < roi->width; x++) /* render scan line */
|
||
|
|
{
|
||
|
|
last_index--;
|
||
|
|
|
||
|
|
if (last_index >= 0)
|
||
|
|
{
|
||
|
|
if (last_max <= 0.0)
|
||
|
|
{
|
||
|
|
out[x] = 0.0;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
last_max = 1.0;
|
||
|
|
|
||
|
|
for (i = self->radius_x; i >= 0; i--)
|
||
|
|
if (last_max > max[x + i][circ[i]])
|
||
|
|
{
|
||
|
|
last_max = max[x + i][circ[i]];
|
||
|
|
last_index = i;
|
||
|
|
}
|
||
|
|
|
||
|
|
out[x] = last_max;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
last_index = self->radius_x;
|
||
|
|
last_max = max[x + self->radius_x][circ[self->radius_x]];
|
||
|
|
|
||
|
|
for (i = self->radius_x - 1; i >= -self->radius_x; i--)
|
||
|
|
if (last_max > max[x + i][circ[i]])
|
||
|
|
{
|
||
|
|
last_max = max[x + i][circ[i]];
|
||
|
|
last_index = i;
|
||
|
|
}
|
||
|
|
|
||
|
|
out[x] = last_max;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
gegl_buffer_set (output,
|
||
|
|
GEGL_RECTANGLE (roi->x, roi->y + y,
|
||
|
|
roi->width, 1),
|
||
|
|
0, output_format, out,
|
||
|
|
GEGL_AUTO_ROWSTRIDE);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* undo the offsets to the pointers so we can free the malloced memory */
|
||
|
|
circ -= self->radius_x;
|
||
|
|
max -= self->radius_x;
|
||
|
|
|
||
|
|
/* free the memory */
|
||
|
|
g_free (circ);
|
||
|
|
g_free (buffer);
|
||
|
|
g_free (max);
|
||
|
|
|
||
|
|
for (i = 0; i < self->radius_y + 1; i++)
|
||
|
|
g_free (buf[i]);
|
||
|
|
|
||
|
|
g_free (buf);
|
||
|
|
g_free (out);
|
||
|
|
|
||
|
|
return TRUE;
|
||
|
|
}
|
