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app: Add "gimp:flood" GEGL operation

Browse source 
This operation assigns to each pixel the minimum of the
maxima of all paths from it to the outside, as if the
input image represents a height map, and the operation
floods it with water.
This commit is contained in:
Ell 2016-01-24 17:08:43 +00:00 • committed by Michael Natterer
parent 101c9d4e88
commit c63bee3440
6 changed files with 325 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

22
app/gegl/gimp-gegl-apply-operation.c
View file

@ -426,6 +426,28 @@ gimp_gegl_apply_shrink (GeglBuffer *src_buffer,
g_object_unref (node);
}
void
gimp_gegl_apply_flood (GeglBuffer *src_buffer,
GimpProgress *progress,
const gchar *undo_desc,
GeglBuffer *dest_buffer,
const GeglRectangle *dest_rect)
{
GeglNode *node;
g_return_if_fail (GEGL_IS_BUFFER (src_buffer));
g_return_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress));
g_return_if_fail (GEGL_IS_BUFFER (dest_buffer));
node = gegl_node_new_child (NULL,
"operation", "gimp:flood",
NULL);
gimp_gegl_apply_operation (src_buffer, progress, undo_desc,
node, dest_buffer, dest_rect);
g_object_unref (node);
}
void
gimp_gegl_apply_gaussian_blur (GeglBuffer *src_buffer,
GimpProgress *progress,

6
app/gegl/gimp-gegl-apply-operation.h
View file

@ -95,6 +95,12 @@ void gimp_gegl_apply_shrink (GeglBuffer *src_buffer,
gint radius_y,
gboolean edge_lock);
void gimp_gegl_apply_flood (GeglBuffer *src_buffer,
GimpProgress *progress,
const gchar *undo_desc,
GeglBuffer *dest_buffer,
const GeglRectangle *dest_rect);
void gimp_gegl_apply_gaussian_blur (GeglBuffer *src_buffer,
GimpProgress *progress,
const gchar *undo_desc,

2
app/operations/Makefile.am
View file

@ -48,6 +48,8 @@ libappoperations_generic_a_sources = \
gimpoperationcagetransform.h \
gimpoperationequalize.c \
gimpoperationequalize.h \
gimpoperationflood.c \
gimpoperationflood.h \
gimpoperationgrow.c \
gimpoperationgrow.h \
gimpoperationhistogramsink.c \

2
app/operations/gimp-operations.c
View file

@ -35,6 +35,7 @@
#include "gimpoperationcagecoefcalc.h"
#include "gimpoperationcagetransform.h"
#include "gimpoperationequalize.h"
#include "gimpoperationflood.h"
#include "gimpoperationgrow.h"
#include "gimpoperationhistogramsink.h"
#include "gimpoperationmaskcomponents.h"
@ -103,6 +104,7 @@ gimp_operations_init (void)
g_type_class_ref (GIMP_TYPE_OPERATION_CAGE_COEF_CALC);
g_type_class_ref (GIMP_TYPE_OPERATION_CAGE_TRANSFORM);
g_type_class_ref (GIMP_TYPE_OPERATION_EQUALIZE);
g_type_class_ref (GIMP_TYPE_OPERATION_FLOOD);
g_type_class_ref (GIMP_TYPE_OPERATION_GROW);
g_type_class_ref (GIMP_TYPE_OPERATION_HISTOGRAM_SINK);
g_type_class_ref (GIMP_TYPE_OPERATION_MASK_COMPONENTS);

240
app/operations/gimpoperationflood.c Normal file
View file

@ -0,0 +1,240 @@
/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpoperationflood.c
* Copyright (C) 2016 Ell
*
* 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 "libgimpcolor/gimpcolor.h"
#include "libgimpmath/gimpmath.h"
#include "operations-types.h"
#include "gimpoperationflood.h"
static void gimp_operation_flood_prepare (GeglOperation *operation);
static GeglRectangle
gimp_operation_flood_get_required_for_output (GeglOperation *self,
const gchar *input_pad,
const GeglRectangle *roi);
static GeglRectangle
gimp_operation_flood_get_cached_region (GeglOperation *self,
const GeglRectangle *roi);
static gboolean gimp_operation_flood_process_segment (const gfloat *src,
gfloat *dest,
gchar *changed,
gint size);
static gboolean gimp_operation_flood_process (GeglOperation *operation,
GeglBuffer *input,
GeglBuffer *output,
const GeglRectangle *roi,
gint level);
G_DEFINE_TYPE (GimpOperationFlood, gimp_operation_flood,
GEGL_TYPE_OPERATION_FILTER)
#define parent_class gimp_operation_flood_parent_class
static void
gimp_operation_flood_class_init (GimpOperationFloodClass *klass)
{
GeglOperationClass *operation_class = GEGL_OPERATION_CLASS (klass);
GeglOperationFilterClass *filter_class = GEGL_OPERATION_FILTER_CLASS (klass);
operation_class->want_in_place = FALSE;
operation_class->threaded = FALSE;
gegl_operation_class_set_keys (operation_class,
"name", "gimp:flood",
"categories", "gimp",
"description", "GIMP Flood operation",
NULL);
operation_class->prepare = gimp_operation_flood_prepare;
operation_class->get_required_for_output = gimp_operation_flood_get_required_for_output;
operation_class->get_cached_region = gimp_operation_flood_get_cached_region;
filter_class->process = gimp_operation_flood_process;
}
static void
gimp_operation_flood_init (GimpOperationFlood *self)
{
}
static void
gimp_operation_flood_prepare (GeglOperation *operation)
{
gegl_operation_set_format (operation, "input", babl_format ("Y float"));
gegl_operation_set_format (operation, "output", babl_format ("Y float"));
}
static GeglRectangle
gimp_operation_flood_get_required_for_output (GeglOperation *self,
const gchar *input_pad,
const GeglRectangle *roi)
{
return *gegl_operation_source_get_bounding_box (self, "input");
}
static GeglRectangle
gimp_operation_flood_get_cached_region (GeglOperation *self,
const GeglRectangle *roi)
{
return *gegl_operation_source_get_bounding_box (self, "input");
}
static gboolean
gimp_operation_flood_process_segment (const gfloat *src,
gfloat *dest,
gchar *changed,
gint size)
{
gint dir;
gboolean any_changed = FALSE;
for (dir = 1; dir >= -1; dir -= 2) /* for dir in [1, -1]: ... */
{
gint i;
gfloat level = 0.0;
for (i = size; i; i--)
{
if (*src > level) { level = *src; }
if (*dest < level) { level = *dest; }
else if (level < *dest) { *dest = level;
*changed = any_changed = TRUE; }
if (i > 1)
{
src += dir;
dest += dir;
changed += dir;
}
}
}
return any_changed;
}
static gboolean
gimp_operation_flood_process (GeglOperation *operation,
GeglBuffer *input,
GeglBuffer *output,
const GeglRectangle *roi,
gint level)
{
const Babl *input_format = babl_format ("Y float");
const Babl *output_format = babl_format ("Y float");
gfloat *src_buffer, *dest_buffer;
gchar *horz_changed, *vert_changed;
gboolean any_changed;
gint forced;
gboolean horz;
GeglColor *color;
g_return_val_if_fail (input != output, FALSE);
src_buffer = g_new (gfloat, MAX (roi->width, roi->height));
dest_buffer = g_new (gfloat, MAX (roi->width, roi->height));
horz_changed = g_new (gchar, roi->width);
vert_changed = g_new (gchar, roi->height);
color = gegl_color_new ("#fff");
gegl_buffer_set_color (output, roi, color);
g_object_unref (color);
forced = 2; /* Force at least one horizontal and one vertical iterations. */
horz = TRUE;
do
{
gint count, size;
GeglRectangle rect = *roi;
gint *coord;
gchar *prev_changed, *curr_changed;
gint i;
any_changed = FALSE;
if (horz)
{
count = roi->height;
size = roi->width;
rect.height = 1;
coord = &rect.y;
prev_changed = vert_changed;
curr_changed = horz_changed;
}
else
{
count = roi->width;
size = roi->height;
rect.width = 1;
coord = &rect.x;
prev_changed = horz_changed;
curr_changed = vert_changed;
}
for (i = 0; i < count; i++, (*coord)++)
{
gboolean this_changed;
if (! (forced || prev_changed[i]))
continue;
prev_changed[i] = FALSE;
gegl_buffer_get (input, &rect, 1.0, input_format, src_buffer,
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
gegl_buffer_get (output, &rect, 1.0, output_format, dest_buffer,
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
this_changed = gimp_operation_flood_process_segment (src_buffer,
dest_buffer,
curr_changed,
size);
if (this_changed)
{
gegl_buffer_set (output, &rect, 0, output_format, dest_buffer,
GEGL_AUTO_ROWSTRIDE);
any_changed = TRUE;
}
}
horz = ! horz;
if (forced)
forced--;
}
while (forced || any_changed);
g_free (src_buffer);
g_free (dest_buffer);
g_free (horz_changed);
g_free (vert_changed);
return TRUE;
}

53
app/operations/gimpoperationflood.h Normal file
View file

@ -0,0 +1,53 @@
/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpoperationflood.h
* Copyright (C) 2016 Ell
*
* 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_FLOOD_H__
#define __GIMP_OPERATION_FLOOD_H__
#include <gegl-plugin.h>
#define GIMP_TYPE_OPERATION_FLOOD (gimp_operation_flood_get_type ())
#define GIMP_OPERATION_FLOOD(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_OPERATION_FLOOD, GimpOperationFlood))
#define GIMP_OPERATION_FLOOD_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_OPERATION_FLOOD, GimpOperationFloodClass))
#define GIMP_IS_OPERATION_FLOOD(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_OPERATION_FLOOD))
#define GIMP_IS_OPERATION_FLOOD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_OPERATION_FLOOD))
#define GIMP_OPERATION_FLOOD_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_OPERATION_FLOOD, GimpOperationFloodClass))
typedef struct _GimpOperationFlood GimpOperationFlood;
typedef struct _GimpOperationFloodClass GimpOperationFloodClass;
struct _GimpOperationFlood
{
GeglOperationFilter parent_instance;
};
struct _GimpOperationFloodClass
{
GeglOperationFilterClass parent_class;
};
GType gimp_operation_flood_get_type (void) G_GNUC_CONST;
#endif /* __GIMP_OPERATION_FLOOD_H__ */