753 lines
23 KiB
C
753 lines
23 KiB
C
/* PIKA - Photo and Image Kooker Application
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* a rebranding of The GNU Image Manipulation Program (created with heckimp)
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* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
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*
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* Original copyright, applying to most contents (license remains unchanged):
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* pikaoperationborder.c
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* Copyright (C) 2012 Michael Natterer <mitch@gimp.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <cairo.h>
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#include <gegl.h>
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#include "libpikacolor/pikacolor.h"
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#include "libpikamath/pikamath.h"
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#include "operations-types.h"
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#include "pikaoperationborder.h"
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enum
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{
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PROP_0,
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PROP_RADIUS_X,
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PROP_RADIUS_Y,
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PROP_FEATHER,
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PROP_EDGE_LOCK
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};
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static void pika_operation_border_get_property (GObject *object,
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guint property_id,
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GValue *value,
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GParamSpec *pspec);
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static void pika_operation_border_set_property (GObject *object,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec);
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static GeglRectangle
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pika_operation_border_get_required_for_output (GeglOperation *self,
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const gchar *input_pad,
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const GeglRectangle *roi);
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static GeglRectangle
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pika_operation_border_get_cached_region (GeglOperation *self,
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const GeglRectangle *roi);
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static void pika_operation_border_prepare (GeglOperation *operation);
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static gboolean pika_operation_border_process (GeglOperation *operation,
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GeglBuffer *input,
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GeglBuffer *output,
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const GeglRectangle *roi,
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gint level);
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G_DEFINE_TYPE (PikaOperationBorder, pika_operation_border,
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GEGL_TYPE_OPERATION_FILTER)
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#define parent_class pika_operation_border_parent_class
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static void
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pika_operation_border_class_init (PikaOperationBorderClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GeglOperationClass *operation_class = GEGL_OPERATION_CLASS (klass);
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GeglOperationFilterClass *filter_class = GEGL_OPERATION_FILTER_CLASS (klass);
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object_class->set_property = pika_operation_border_set_property;
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object_class->get_property = pika_operation_border_get_property;
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gegl_operation_class_set_keys (operation_class,
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"name", "pika:border",
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"categories", "pika",
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"description", "PIKA Border operation",
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NULL);
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operation_class->prepare = pika_operation_border_prepare;
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operation_class->get_required_for_output = pika_operation_border_get_required_for_output;
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operation_class->get_cached_region = pika_operation_border_get_cached_region;
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operation_class->threaded = FALSE;
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filter_class->process = pika_operation_border_process;
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g_object_class_install_property (object_class, PROP_RADIUS_X,
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g_param_spec_int ("radius-x",
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"Radius X",
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"Border radius in X diection",
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1, 2342, 1,
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G_PARAM_READWRITE |
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G_PARAM_CONSTRUCT));
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g_object_class_install_property (object_class, PROP_RADIUS_Y,
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g_param_spec_int ("radius-y",
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"Radius Y",
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"Border radius in Y diection",
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1, 2342, 1,
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G_PARAM_READWRITE |
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G_PARAM_CONSTRUCT));
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g_object_class_install_property (object_class, PROP_FEATHER,
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g_param_spec_boolean ("feather",
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"Feather",
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"Feather the border",
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FALSE,
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G_PARAM_READWRITE |
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G_PARAM_CONSTRUCT));
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g_object_class_install_property (object_class, PROP_EDGE_LOCK,
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g_param_spec_boolean ("edge-lock",
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"Edge Lock",
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"Shrink from border",
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FALSE,
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G_PARAM_READWRITE |
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G_PARAM_CONSTRUCT));
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}
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static void
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pika_operation_border_init (PikaOperationBorder *self)
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{
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}
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static void
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pika_operation_border_get_property (GObject *object,
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guint property_id,
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GValue *value,
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GParamSpec *pspec)
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{
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PikaOperationBorder *self = PIKA_OPERATION_BORDER (object);
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switch (property_id)
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{
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case PROP_RADIUS_X:
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g_value_set_int (value, self->radius_x);
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break;
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case PROP_RADIUS_Y:
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g_value_set_int (value, self->radius_y);
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break;
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case PROP_FEATHER:
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g_value_set_boolean (value, self->feather);
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break;
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case PROP_EDGE_LOCK:
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g_value_set_boolean (value, self->edge_lock);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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static void
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pika_operation_border_set_property (GObject *object,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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PikaOperationBorder *self = PIKA_OPERATION_BORDER (object);
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switch (property_id)
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{
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case PROP_RADIUS_X:
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self->radius_x = g_value_get_int (value);
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break;
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case PROP_RADIUS_Y:
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self->radius_y = g_value_get_int (value);
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break;
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case PROP_FEATHER:
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self->feather = g_value_get_boolean (value);
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break;
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case PROP_EDGE_LOCK:
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self->edge_lock = g_value_get_boolean (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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static void
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pika_operation_border_prepare (GeglOperation *operation)
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{
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const Babl *space = gegl_operation_get_source_space (operation, "input");
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gegl_operation_set_format (operation, "input", babl_format_with_space ("Y float", space));
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gegl_operation_set_format (operation, "output", babl_format_with_space ("Y float", space));
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}
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static GeglRectangle
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pika_operation_border_get_required_for_output (GeglOperation *self,
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const gchar *input_pad,
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const GeglRectangle *roi)
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{
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return *gegl_operation_source_get_bounding_box (self, "input");
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}
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static GeglRectangle
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pika_operation_border_get_cached_region (GeglOperation *self,
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const GeglRectangle *roi)
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{
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return *gegl_operation_source_get_bounding_box (self, "input");
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}
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static inline void
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rotate_pointers (gfloat **p,
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guint32 n)
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{
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guint32 i;
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gfloat *tmp;
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tmp = p[0];
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for (i = 0; i < n - 1; i++)
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p[i] = p[i + 1];
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p[i] = tmp;
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}
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/* Computes whether pixels in `buf[1]', if they are selected, have neighbouring
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pixels that are unselected. Put result in `transition'. */
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static void
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compute_transition (gfloat *transition,
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gfloat **buf,
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gint32 width,
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gboolean edge_lock)
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{
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register gint32 x = 0;
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if (width == 1)
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{
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if (buf[1][0] >= 0.5 && (buf[0][0] < 0.5 || buf[2][0] < 0.5))
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transition[0] = 1.0;
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else
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transition[0] = 0.0;
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return;
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}
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if (buf[1][0] >= 0.5 && edge_lock)
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{
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/* The pixel to the left (outside of the canvas) is considered selected,
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so we check if there are any unselected pixels in neighbouring pixels
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_on_ the canvas. */
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if (buf[0][x] < 0.5 || buf[0][x + 1] < 0.5 ||
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buf[1][x + 1] < 0.5 ||
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buf[2][x] < 0.5 || buf[2][x + 1] < 0.5 )
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{
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transition[x] = 1.0;
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}
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else
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{
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transition[x] = 0.0;
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}
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}
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else if (buf[1][0] >= 0.5 && !edge_lock)
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{
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/* We must not care about neighbouring pixels on the image canvas since
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there always are unselected pixels to the left (which is outside of
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the image canvas). */
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transition[x] = 1.0;
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}
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else
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{
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transition[x] = 0.0;
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}
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for (x = 1; x < width - 1; x++)
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{
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if (buf[1][x] >= 0.5)
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{
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if (buf[0][x - 1] < 0.5 || buf[0][x] < 0.5 || buf[0][x + 1] < 0.5 ||
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buf[1][x - 1] < 0.5 || buf[1][x + 1] < 0.5 ||
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buf[2][x - 1] < 0.5 || buf[2][x] < 0.5 || buf[2][x + 1] < 0.5)
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transition[x] = 1.0;
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else
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transition[x] = 0.0;
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}
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else
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{
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transition[x] = 0.0;
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}
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}
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if (buf[1][width - 1] >= 0.5 && edge_lock)
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{
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/* The pixel to the right (outside of the canvas) is considered selected,
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so we check if there are any unselected pixels in neighbouring pixels
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_on_ the canvas. */
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if ( buf[0][x - 1] < 0.5 || buf[0][x] < 0.5 ||
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buf[1][x - 1] < 0.5 ||
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buf[2][x - 1] < 0.5 || buf[2][x] < 0.5)
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{
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transition[width - 1] = 1.0;
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}
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else
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{
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transition[width - 1] = 0.0;
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}
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}
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else if (buf[1][width - 1] >= 0.5 && !edge_lock)
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{
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/* We must not care about neighbouring pixels on the image canvas since
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there always are unselected pixels to the right (which is outside of
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the image canvas). */
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transition[width - 1] = 1.0;
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}
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else
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{
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transition[width - 1] = 0.0;
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}
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}
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static gboolean
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pika_operation_border_process (GeglOperation *operation,
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GeglBuffer *input,
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GeglBuffer *output,
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const GeglRectangle *roi,
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gint level)
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{
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/* This function has no bugs, but if you imagine some you can blame
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* them on jaycox@gimp.org
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*/
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PikaOperationBorder *self = PIKA_OPERATION_BORDER (operation);
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const Babl *input_format = gegl_operation_get_format (operation, "input");
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const Babl *output_format = gegl_operation_get_format (operation, "output");
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gint32 i, j, x, y;
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/* A cache used in the algorithm as it works its way down. `buf[1]' is the
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current row. Thus, at algorithm initialization, `buf[0]' represents the
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row 'above' the first row of the region. */
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gfloat *buf[3];
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/* The resulting selection is calculated row by row, and this buffer holds the
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output for each individual row, on each iteration. */
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gfloat *out;
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/* Keeps track of transitional pixels (pixels that are selected and have
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unselected neighbouring pixels). */
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gfloat **transition;
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/* TODO: Figure out role clearly in algorithm. */
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gint16 *max;
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/* TODO: Figure out role clearly in algorithm. */
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gfloat **density;
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gint16 last_index;
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/* optimize this case specifically */
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if (self->radius_x == 1 && self->radius_y == 1)
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{
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gfloat *transition;
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gfloat *source[3];
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for (i = 0; i < 3; i++)
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source[i] = g_new (gfloat, roi->width);
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transition = g_new (gfloat, roi->width);
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/* With `self->edge_lock', initialize row above image as
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* selected, otherwise, initialize as unselected.
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*/
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if (self->edge_lock)
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{
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for (i = 0; i < roi->width; i++)
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source[0][i] = 1.0;
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}
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else
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{
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memset (source[0], 0, roi->width * sizeof (gfloat));
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}
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gegl_buffer_get (input,
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GEGL_RECTANGLE (roi->x, roi->y + 0,
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roi->width, 1),
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1.0, input_format, source[1],
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GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
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if (roi->height > 1)
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gegl_buffer_get (input,
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GEGL_RECTANGLE (roi->x, roi->y + 1,
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roi->width, 1),
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1.0, input_format, source[2],
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GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
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else
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memcpy (source[2], source[1], roi->width * sizeof (gfloat));
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compute_transition (transition, source, roi->width, self->edge_lock);
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gegl_buffer_set (output,
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GEGL_RECTANGLE (roi->x, roi->y,
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roi->width, 1),
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0, output_format, transition,
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GEGL_AUTO_ROWSTRIDE);
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for (y = 1; y < roi->height; y++)
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{
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rotate_pointers (source, 3);
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if (y + 1 < roi->height)
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{
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gegl_buffer_get (input,
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GEGL_RECTANGLE (roi->x, roi->y + y + 1,
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roi->width, 1),
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1.0, input_format, source[2],
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GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
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}
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else
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{
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/* Depending on `self->edge_lock', set the row below the
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* image as either selected or non-selected.
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*/
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if (self->edge_lock)
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{
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for (i = 0; i < roi->width; i++)
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source[2][i] = 1.0;
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}
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else
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{
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memset (source[2], 0, roi->width * sizeof (gfloat));
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}
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}
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compute_transition (transition, source, roi->width, self->edge_lock);
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gegl_buffer_set (output,
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GEGL_RECTANGLE (roi->x, roi->y + y,
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roi->width, 1),
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0, output_format, transition,
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GEGL_AUTO_ROWSTRIDE);
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}
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for (i = 0; i < 3; i++)
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g_free (source[i]);
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g_free (transition);
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/* Finished handling the radius = 1 special case, return here. */
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return TRUE;
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}
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max = g_new (gint16, roi->width + 2 * self->radius_x);
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for (i = 0; i < (roi->width + 2 * self->radius_x); i++)
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max[i] = self->radius_y + 2;
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max += self->radius_x;
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for (i = 0; i < 3; i++)
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buf[i] = g_new (gfloat, roi->width);
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transition = g_new (gfloat *, self->radius_y + 1);
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for (i = 0; i < self->radius_y + 1; i++)
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{
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transition[i] = g_new (gfloat, roi->width + 2 * self->radius_x);
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memset (transition[i], 0,
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(roi->width + 2 * self->radius_x) * sizeof (gfloat));
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transition[i] += self->radius_x;
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}
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out = g_new (gfloat, roi->width);
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density = g_new (gfloat *, 2 * self->radius_x + 1);
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density += self->radius_x;
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/* allocate density[][] */
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for (x = 0; x < (self->radius_x + 1); x++)
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{
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density[ x] = g_new (gfloat, 2 * self->radius_y + 1);
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density[ x] += self->radius_y;
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density[-x] = density[x];
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}
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/* compute density[][] */
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for (x = 0; x < (self->radius_x + 1); x++)
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{
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gdouble tmpx, tmpy, dist;
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gfloat a;
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if (x > 0)
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tmpx = x - 0.5;
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else if (x < 0)
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tmpx = x + 0.5;
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else
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tmpx = 0.0;
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for (y = 0; y < (self->radius_y + 1); y++)
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{
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if (y > 0)
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tmpy = y - 0.5;
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else if (y < 0)
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tmpy = y + 0.5;
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else
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tmpy = 0.0;
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dist = ((tmpy * tmpy) / (self->radius_y * self->radius_y) +
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(tmpx * tmpx) / (self->radius_x * self->radius_x));
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if (dist < 1.0)
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{
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if (self->feather)
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a = 1.0 - sqrt (dist);
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else
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a = 1.0;
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}
|
|
else
|
|
{
|
|
a = 0.0;
|
|
}
|
|
|
|
density[ x][ y] = a;
|
|
density[ x][-y] = a;
|
|
density[-x][ y] = a;
|
|
density[-x][-y] = a;
|
|
}
|
|
}
|
|
|
|
/* Since the algorithm considerers `buf[0]' to be 'over' the row
|
|
* currently calculated, we must start with `buf[0]' as non-selected
|
|
* if there is no `self->edge_lock. If there is an
|
|
* 'self->edge_lock', initialize the first row to 'selected'. Refer
|
|
* to bug #350009.
|
|
*/
|
|
if (self->edge_lock)
|
|
{
|
|
for (i = 0; i < roi->width; i++)
|
|
buf[0][i] = 1.0;
|
|
}
|
|
else
|
|
{
|
|
memset (buf[0], 0, roi->width * sizeof (gfloat));
|
|
}
|
|
|
|
gegl_buffer_get (input,
|
|
GEGL_RECTANGLE (roi->x, roi->y + 0,
|
|
roi->width, 1),
|
|
1.0, input_format, buf[1],
|
|
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
|
|
|
|
if (roi->height > 1)
|
|
gegl_buffer_get (input,
|
|
GEGL_RECTANGLE (roi->x, roi->y + 1,
|
|
roi->width, 1),
|
|
1.0, input_format, buf[2],
|
|
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
|
|
else
|
|
memcpy (buf[2], buf[1], roi->width * sizeof (gfloat));
|
|
|
|
compute_transition (transition[1], buf, roi->width, self->edge_lock);
|
|
|
|
/* set up top of image */
|
|
for (y = 1; y < self->radius_y && y + 1 < roi->height; y++)
|
|
{
|
|
rotate_pointers (buf, 3);
|
|
gegl_buffer_get (input,
|
|
GEGL_RECTANGLE (roi->x, roi->y + y + 1,
|
|
roi->width, 1),
|
|
1.0, input_format, buf[2],
|
|
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
|
|
compute_transition (transition[y + 1], buf, roi->width, self->edge_lock);
|
|
}
|
|
|
|
/* set up max[] for top of image */
|
|
for (x = 0; x < roi->width; x++)
|
|
{
|
|
max[x] = -(self->radius_y + 7);
|
|
|
|
for (j = 1; j < self->radius_y + 1; j++)
|
|
if (transition[j][x])
|
|
{
|
|
max[x] = j;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* main calculation loop */
|
|
for (y = 0; y < roi->height; y++)
|
|
{
|
|
rotate_pointers (buf, 3);
|
|
rotate_pointers (transition, self->radius_y + 1);
|
|
|
|
if (y < roi->height - (self->radius_y + 1))
|
|
{
|
|
gegl_buffer_get (input,
|
|
GEGL_RECTANGLE (roi->x,
|
|
roi->y + y + self->radius_y + 1,
|
|
roi->width, 1),
|
|
1.0, input_format, buf[2],
|
|
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
|
|
compute_transition (transition[self->radius_y], buf, roi->width, self->edge_lock);
|
|
}
|
|
else
|
|
{
|
|
if (self->edge_lock)
|
|
{
|
|
memcpy (transition[self->radius_y], transition[self->radius_y - 1], roi->width * sizeof (gfloat));
|
|
}
|
|
else
|
|
{
|
|
/* No edge lock, set everything 'below canvas' as seen
|
|
* from the algorithm as unselected.
|
|
*/
|
|
memset (buf[2], 0, roi->width * sizeof (gfloat));
|
|
compute_transition (transition[self->radius_y], buf, roi->width, self->edge_lock);
|
|
}
|
|
}
|
|
|
|
/* update max array */
|
|
for (x = 0; x < roi->width; x++)
|
|
{
|
|
if (max[x] < 1)
|
|
{
|
|
if (max[x] <= -self->radius_y)
|
|
{
|
|
if (transition[self->radius_y][x])
|
|
max[x] = self->radius_y;
|
|
else
|
|
max[x]--;
|
|
}
|
|
else
|
|
{
|
|
if (transition[-max[x]][x])
|
|
max[x] = -max[x];
|
|
else if (transition[-max[x] + 1][x])
|
|
max[x] = -max[x] + 1;
|
|
else
|
|
max[x]--;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
max[x]--;
|
|
}
|
|
|
|
if (max[x] < -self->radius_y - 1)
|
|
max[x] = -self->radius_y - 1;
|
|
}
|
|
|
|
last_index = 1;
|
|
|
|
/* render scan line */
|
|
for (x = 0 ; x < roi->width; x++)
|
|
{
|
|
gfloat last_max;
|
|
|
|
last_index--;
|
|
|
|
if (last_index >= 0)
|
|
{
|
|
last_max = 0.0;
|
|
|
|
for (i = self->radius_x; i >= 0; i--)
|
|
if (max[x + i] <= self->radius_y && max[x + i] >= -self->radius_y &&
|
|
density[i][max[x+i]] > last_max)
|
|
{
|
|
last_max = density[i][max[x + i]];
|
|
last_index = i;
|
|
}
|
|
|
|
out[x] = last_max;
|
|
}
|
|
else
|
|
{
|
|
last_max = 0.0;
|
|
|
|
for (i = self->radius_x; i >= -self->radius_x; i--)
|
|
if (max[x + i] <= self->radius_y && max[x + i] >= -self->radius_y &&
|
|
density[i][max[x + i]] > last_max)
|
|
{
|
|
last_max = density[i][max[x + i]];
|
|
last_index = i;
|
|
}
|
|
|
|
out[x] = last_max;
|
|
}
|
|
|
|
if (last_max <= 0.0)
|
|
{
|
|
for (i = x + 1; i < roi->width; i++)
|
|
{
|
|
if (max[i] >= -self->radius_y)
|
|
break;
|
|
}
|
|
|
|
if (i - x > self->radius_x)
|
|
{
|
|
for (; x < i - self->radius_x; x++)
|
|
out[x] = 0;
|
|
|
|
x--;
|
|
}
|
|
|
|
last_index = self->radius_x;
|
|
}
|
|
}
|
|
|
|
gegl_buffer_set (output,
|
|
GEGL_RECTANGLE (roi->x, roi->y + y,
|
|
roi->width, 1),
|
|
0, output_format, out,
|
|
GEGL_AUTO_ROWSTRIDE);
|
|
}
|
|
|
|
g_free (out);
|
|
|
|
for (i = 0; i < 3; i++)
|
|
g_free (buf[i]);
|
|
|
|
max -= self->radius_x;
|
|
g_free (max);
|
|
|
|
for (i = 0; i < self->radius_y + 1; i++)
|
|
{
|
|
transition[i] -= self->radius_x;
|
|
g_free (transition[i]);
|
|
}
|
|
|
|
g_free (transition);
|
|
|
|
for (i = 0; i < self->radius_x + 1 ; i++)
|
|
{
|
|
density[i] -= self->radius_y;
|
|
g_free (density[i]);
|
|
}
|
|
|
|
density -= self->radius_x;
|
|
g_free (density);
|
|
|
|
return TRUE;
|
|
}
|
