PIKApp/app/operations/pikaoperationcomposecrop.c

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2023-09-26 00:35:21 +02:00
/* 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
*
* pikaoperationcomposecrop.c
* Copyright (C) 2012 Michael Natterer <mitch@gimp.org>
* Copyright (C) 2016 Massimo Valentini <mvalentini@src.gnome.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 <gegl.h>
#include "operations-types.h"
#include "pikaoperationcomposecrop.h"
enum
{
PROP_0,
PROP_X,
PROP_Y,
PROP_WIDTH,
PROP_HEIGHT
};
static void pika_operation_compose_crop_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void pika_operation_compose_crop_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void pika_operation_compose_crop_prepare (GeglOperation *operation);
static GeglRectangle pika_operation_compose_crop_get_required_for_output (GeglOperation *operation,
const gchar *input_pad,
const GeglRectangle *output_roi);
static gboolean pika_operation_compose_crop_parent_process (GeglOperation *operation,
GeglOperationContext *context,
const gchar *output_pad,
const GeglRectangle *roi,
gint level);
static gboolean pika_operation_compose_crop_process (GeglOperation *operation,
void *in_buf,
void *aux_buf,
void *out_buf,
glong samples,
const GeglRectangle *roi,
gint level);
G_DEFINE_TYPE (PikaOperationComposeCrop, pika_operation_compose_crop,
GEGL_TYPE_OPERATION_POINT_COMPOSER)
#define parent_class pika_operation_compose_crop_parent_class
static void
pika_operation_compose_crop_class_init (PikaOperationComposeCropClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GeglOperationClass *operation_class = GEGL_OPERATION_CLASS (klass);
GeglOperationPointComposerClass *point_class = GEGL_OPERATION_POINT_COMPOSER_CLASS (klass);
object_class->set_property = pika_operation_compose_crop_set_property;
object_class->get_property = pika_operation_compose_crop_get_property;
gegl_operation_class_set_keys (operation_class,
"name", "pika:compose-crop",
"categories", "pika",
"description", "Selectively pick components from src or aux",
NULL);
operation_class->prepare = pika_operation_compose_crop_prepare;
operation_class->get_invalidated_by_change = pika_operation_compose_crop_get_required_for_output;
operation_class->get_required_for_output = pika_operation_compose_crop_get_required_for_output;
operation_class->process = pika_operation_compose_crop_parent_process;
point_class->process = pika_operation_compose_crop_process;
g_object_class_install_property (object_class, PROP_X,
g_param_spec_int ("x",
"x",
"x",
G_MININT, G_MAXINT, 0,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_Y,
g_param_spec_int ("y",
"y",
"y",
G_MININT, G_MAXINT, 0,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_WIDTH,
g_param_spec_int ("width",
"width",
"width",
0, G_MAXINT, 0,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_HEIGHT,
g_param_spec_int ("height",
"height",
"height",
0, G_MAXINT, 0,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
}
static void
pika_operation_compose_crop_init (PikaOperationComposeCrop *self)
{
}
static void
pika_operation_compose_crop_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
PikaOperationComposeCrop *self = PIKA_OPERATION_COMPOSE_CROP (object);
switch (property_id)
{
case PROP_X:
g_value_set_int (value, self->rect.x);
break;
case PROP_Y:
g_value_set_int (value, self->rect.y);
break;
case PROP_WIDTH:
g_value_set_int (value, self->rect.width);
break;
case PROP_HEIGHT:
g_value_set_int (value, self->rect.height);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
pika_operation_compose_crop_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
PikaOperationComposeCrop *self = PIKA_OPERATION_COMPOSE_CROP (object);
switch (property_id)
{
case PROP_X:
self->rect.x = g_value_get_int (value);
break;
case PROP_Y:
self->rect.y = g_value_get_int (value);
break;
case PROP_WIDTH:
self->rect.width = g_value_get_int (value);
break;
case PROP_HEIGHT:
self->rect.height = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
pika_operation_compose_crop_prepare (GeglOperation *operation)
{
const Babl *input_format = gegl_operation_get_source_format (operation, "input");
const Babl *aux_format = gegl_operation_get_source_format (operation, "aux");
const Babl *format;
if (input_format)
{
if (input_format == aux_format)
{
format = input_format;
}
else
{
const Babl *model = babl_format_get_model (input_format);
if (! strcmp (babl_get_name (model), "R'G'B'A"))
format = babl_format_with_space ("R'G'B'A float", input_format);
else
format = babl_format_with_space ("RGBA float", input_format);
}
}
else
{
format = babl_format_with_space ("RGBA float", input_format);
}
gegl_operation_set_format (operation, "input", format);
gegl_operation_set_format (operation, "aux", format);
gegl_operation_set_format (operation, "output", format);
}
static GeglRectangle
pika_operation_compose_crop_get_required_for_output (GeglOperation *operation,
const gchar *input_pad,
const GeglRectangle *output_roi)
{
PikaOperationComposeCrop *self = PIKA_OPERATION_COMPOSE_CROP (operation);
GeglRectangle result;
if (! strcmp (input_pad, "input"))
gegl_rectangle_intersect (&result, output_roi, &self->rect);
else if (! strcmp (input_pad, "aux"))
gegl_rectangle_subtract_bounding_box (&result, output_roi, &self->rect);
else
g_return_val_if_reached (*output_roi);
return result;
}
static gboolean
pika_operation_compose_crop_parent_process (GeglOperation *operation,
GeglOperationContext *context,
const gchar *output_pad,
const GeglRectangle *roi,
gint level)
{
PikaOperationComposeCrop *self = PIKA_OPERATION_COMPOSE_CROP (operation);
if (gegl_rectangle_contains (&self->rect, roi))
{
GObject *input;
input = gegl_operation_context_get_object (context, "input");
gegl_operation_context_set_object (context, "output", input);
return TRUE;
}
else if (! gegl_rectangle_intersect (NULL, &self->rect, roi))
{
GObject *aux;
aux = gegl_operation_context_get_object (context, "aux");
gegl_operation_context_set_object (context, "output", aux);
return TRUE;
}
return GEGL_OPERATION_CLASS (parent_class)->process (operation, context,
output_pad, roi, level);
}
static gboolean
pika_operation_compose_crop_process (GeglOperation *operation,
void *in_buf,
void *aux_buf,
void *out_buf,
glong samples,
const GeglRectangle *roi,
gint level)
{
PikaOperationComposeCrop *self = PIKA_OPERATION_COMPOSE_CROP (operation);
const Babl *format = gegl_operation_get_format (operation, "output");
gint bpp = babl_format_get_bytes_per_pixel (format);
const guchar *in = in_buf;
const guchar *aux = aux_buf;
guchar *out = out_buf;
gint x0, x1;
gint y0, y1;
gint y;
#define COPY(src, n) \
do \
{ \
gint size = (n) * bpp; \
\
if (src) \
memcpy (out, (src), size); \
else \
memset (out, 0, size); \
\
in += size; \
if (aux) aux += size; \
out += size; \
} \
while (FALSE)
x0 = CLAMP (self->rect.x, roi->x, roi->x + roi->width);
x1 = CLAMP (self->rect.x + self->rect.width, roi->x, roi->x + roi->width);
y0 = CLAMP (self->rect.y, roi->y, roi->y + roi->height);
y1 = CLAMP (self->rect.y + self->rect.height, roi->y, roi->y + roi->height);
COPY (aux, (y0 - roi->y) * roi->width);
for (y = y0; y < y1; y++)
{
COPY (aux, x0 - roi->x);
COPY (in, x1 - x0);
COPY (aux, roi->x + roi->width - x1);
}
COPY (aux, (roi->y + roi->height - y1) * roi->width);
#undef COPY
return TRUE;
}