PIKApp/plug-ins/common/file-farbfeld.c

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/* PIKA - Photo and Image Kooker Application
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* Farbfeld Image Format plug-in
*
* Copyright (C) 2023 Alex S.
*
* 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 <string.h>
#include <errno.h>
#include <glib/gstdio.h>
#include <libpika/pika.h>
#include <libpika/pikaui.h>
#include "libpika/stdplugins-intl.h"
#define LOAD_PROC "file-farbfeld-load"
#define SAVE_PROC "file-farbfeld-save"
#define PLUG_IN_BINARY "file-farbfeld"
#define PLUG_IN_ROLE "pika-file-farbfeld"
typedef struct _Farbfeld Farbfeld;
typedef struct _FarbfeldClass FarbfeldClass;
struct _Farbfeld
{
PikaPlugIn parent_instance;
};
struct _FarbfeldClass
{
PikaPlugInClass parent_class;
};
#define FARBFELD_TYPE (farbfeld_get_type ())
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#define FARBFELD(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), FARBFELD_TYPE, Farbfeld))
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GType farbfeld_get_type (void) G_GNUC_CONST;
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static GList * farbfeld_query_procedures (PikaPlugIn *plug_in);
static PikaProcedure * farbfeld_create_procedure (PikaPlugIn *plug_in,
const gchar *name);
static PikaValueArray * farbfeld_load (PikaProcedure *procedure,
PikaRunMode run_mode,
GFile *file,
PikaMetadata *metadata,
PikaMetadataLoadFlags *flags,
PikaProcedureConfig *config,
gpointer run_data);
static PikaValueArray * farbfeld_save (PikaProcedure *procedure,
PikaRunMode run_mode,
PikaImage *image,
gint n_drawables,
PikaDrawable **drawables,
GFile *file,
PikaMetadata *metadata,
PikaProcedureConfig *config,
gpointer run_data);
static PikaImage * load_image (GFile *file,
GObject *config,
PikaRunMode run_mode,
GError **error);
static gboolean save_image (GFile *file,
PikaImage *image,
PikaDrawable *drawable,
GError **error);
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G_DEFINE_TYPE (Farbfeld, farbfeld, PIKA_TYPE_PLUG_IN)
PIKA_MAIN (FARBFELD_TYPE)
DEFINE_STD_SET_I18N
static void
farbfeld_class_init (FarbfeldClass *klass)
{
PikaPlugInClass *plug_in_class = PIKA_PLUG_IN_CLASS (klass);
plug_in_class->query_procedures = farbfeld_query_procedures;
plug_in_class->create_procedure = farbfeld_create_procedure;
plug_in_class->set_i18n = STD_SET_I18N;
}
static void
farbfeld_init (Farbfeld *farbfeld)
{
}
static GList *
farbfeld_query_procedures (PikaPlugIn *plug_in)
{
GList *list = NULL;
list = g_list_append (list, g_strdup (LOAD_PROC));
list = g_list_append (list, g_strdup (SAVE_PROC));
return list;
}
static PikaProcedure *
farbfeld_create_procedure (PikaPlugIn *plug_in,
const gchar *name)
{
PikaProcedure *procedure = NULL;
if (! strcmp (name, LOAD_PROC))
{
procedure = pika_load_procedure_new (plug_in, name,
PIKA_PDB_PROC_TYPE_PLUGIN,
farbfeld_load, NULL, NULL);
pika_procedure_set_menu_label (procedure,
N_("Farbfeld"));
pika_procedure_set_documentation (procedure,
_("Load file in the Farbfeld file "
"format"),
_("Load file in the Farbfeld file "
"format"),
name);
pika_procedure_set_attribution (procedure,
"Alex S.",
"Alex S.",
"2023");
pika_file_procedure_set_extensions (PIKA_FILE_PROCEDURE (procedure),
"ff");
pika_file_procedure_set_magics (PIKA_FILE_PROCEDURE (procedure),
"0,string,farbfeld");
}
else if (! strcmp (name, SAVE_PROC))
{
procedure = pika_save_procedure_new (plug_in, name,
PIKA_PDB_PROC_TYPE_PLUGIN,
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FALSE, farbfeld_save, NULL, NULL);
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pika_procedure_set_image_types (procedure, "*");
pika_procedure_set_menu_label (procedure, _("Farbfeld"));
pika_procedure_set_documentation (procedure,
_("Export image in the Farbfeld file "
"format"),
_("Export image in the Farbfeld file "
"format"),
name);
pika_procedure_set_attribution (procedure,
"Alex S.",
"Alex S.",
"2023");
pika_file_procedure_set_extensions (PIKA_FILE_PROCEDURE (procedure),
"ff");
}
return procedure;
}
static PikaValueArray *
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farbfeld_load (PikaProcedure *procedure,
PikaRunMode run_mode,
GFile *file,
PikaMetadata *metadata,
PikaMetadataLoadFlags *flags,
PikaProcedureConfig *config,
gpointer run_data)
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{
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PikaValueArray *return_vals;
PikaImage *image;
GError *error = NULL;
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gegl_init (NULL, NULL);
image = load_image (file, G_OBJECT (config), run_mode, &error);
if (! image)
return pika_procedure_new_return_values (procedure,
PIKA_PDB_EXECUTION_ERROR,
error);
return_vals = pika_procedure_new_return_values (procedure,
PIKA_PDB_SUCCESS,
NULL);
PIKA_VALUES_SET_IMAGE (return_vals, 1, image);
return return_vals;
}
static PikaValueArray *
farbfeld_save (PikaProcedure *procedure,
PikaRunMode run_mode,
PikaImage *image,
gint n_drawables,
PikaDrawable **drawables,
GFile *file,
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PikaMetadata *metadata,
PikaProcedureConfig *config,
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gpointer run_data)
{
PikaPDBStatusType status = PIKA_PDB_SUCCESS;
PikaExportReturn export = PIKA_EXPORT_CANCEL;
GError *error = NULL;
gegl_init (NULL, NULL);
switch (run_mode)
{
case PIKA_RUN_INTERACTIVE:
case PIKA_RUN_WITH_LAST_VALS:
pika_ui_init (PLUG_IN_BINARY);
export = pika_export_image (&image, &n_drawables, &drawables, "farbfeld",
PIKA_EXPORT_CAN_HANDLE_RGB |
PIKA_EXPORT_CAN_HANDLE_GRAY |
PIKA_EXPORT_CAN_HANDLE_INDEXED |
PIKA_EXPORT_CAN_HANDLE_ALPHA);
if (export == PIKA_EXPORT_CANCEL)
return pika_procedure_new_return_values (procedure,
PIKA_PDB_CANCEL,
NULL);
break;
default:
break;
}
if (n_drawables != 1)
{
g_set_error (&error, G_FILE_ERROR, 0,
_("Farbfeld format does not support multiple layers."));
return pika_procedure_new_return_values (procedure,
PIKA_PDB_CALLING_ERROR,
error);
}
if (! save_image (file, image, drawables[0], &error))
status = PIKA_PDB_EXECUTION_ERROR;
if (export == PIKA_EXPORT_EXPORT)
{
pika_image_delete (image);
g_free (drawables);
}
return pika_procedure_new_return_values (procedure, status, error);
}
static PikaImage *
load_image (GFile *file,
GObject *config,
PikaRunMode run_mode,
GError **error)
{
PikaImage *image = NULL;
PikaLayer *layer;
GeglBuffer *buffer;
guint16 *pixels;
guchar magic_number[8];
guint32 width;
guint32 height;
guint32 row_size;
const Babl *format = babl_format ("R'G'B'A u16");
FILE *fp;
fp = g_fopen (g_file_peek_path (file), "rb");
if (! fp)
{
g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno),
_("Could not open '%s' for reading: %s"),
pika_file_get_utf8_name (file), g_strerror (errno));
return NULL;
}
/* Load the header */
if (! fread (magic_number, 8, 1, fp) ||
! fread (&width, sizeof (guint32), 1, fp) ||
! fread (&height, sizeof (guint32), 1, fp))
{
g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno),
_("Failed to read Farbfeld header"));
return NULL;
}
/* Header information is stored in Big-Endian format */
width = GUINT32_FROM_BE (width);
height = GUINT32_FROM_BE (height);
row_size = width * sizeof (guint16) * 4;
image = pika_image_new_with_precision (width, height, PIKA_RGB,
PIKA_PRECISION_U16_NON_LINEAR);
layer = pika_layer_new (image, _("Background"), width, height,
PIKA_RGBA_IMAGE, 100,
pika_image_get_default_new_layer_mode (image));
pika_image_insert_layer (image, layer, NULL, 0);
buffer = pika_drawable_get_buffer (PIKA_DRAWABLE (layer));
for (gint i = 0; i < height; i++)
{
pixels = g_malloc (row_size);
if (! fread (pixels, row_size, 1, fp))
{
g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno),
_("Premature end of Farbfeld pixel data"));
return NULL;
}
/* Pixels are also stored in Big-Endian format */
for (gint j = 0; j < (width * 4); j++)
pixels[j] = GUINT16_FROM_BE (pixels[j]);
gegl_buffer_set (buffer,
GEGL_RECTANGLE (0, i, width, 1), 0,
format, pixels, GEGL_AUTO_ROWSTRIDE);
g_free (pixels);
}
fclose (fp);
g_object_unref (buffer);
return image;
}
static gboolean
save_image (GFile *file,
PikaImage *image,
PikaDrawable *drawable,
GError **error)
{
FILE *fp;
GeglBuffer *buffer;
guint16 *pixels;
const Babl *format = babl_format ("R'G'B'A u16");
gchar *magic_number;
guint32 image_width;
guint32 image_height;
guint32 export_width;
guint32 export_height;
pika_progress_init_printf (_("Exporting '%s'"),
pika_file_get_utf8_name (file));
fp = g_fopen (g_file_peek_path (file), "wb");
if (! fp)
{
g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno),
_("Could not open '%s' for writing: %s"),
pika_file_get_utf8_name (file), g_strerror (errno));
return FALSE;
}
buffer = pika_drawable_get_buffer (drawable);
image_width = gegl_buffer_get_width (buffer);
image_height = gegl_buffer_get_height (buffer);
/* Farbfeld values are Big-Endian */
export_width = GUINT32_TO_BE (image_width);
export_height = GUINT32_TO_BE (image_height);
/* Write header */
magic_number = "farbfeld";
for (gint i = 0; i < 8; i++)
fputc (magic_number[i], fp);
fwrite ((gchar *) &export_width, 1, 4, fp);
fwrite ((gchar *) &export_height, 1, 4, fp);
/* Write pixel data */
for (gint i = 0; i < image_height; i++)
{
pixels = g_malloc (image_width * sizeof (guint16) * 4);
gegl_buffer_get (buffer, GEGL_RECTANGLE (0, i, image_width, 1),
1.0, format, pixels,
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
for (gint j = 0; j < (image_width * 4); j++)
{
pixels[j] = GUINT16_TO_BE (pixels[j]);
fwrite ((gchar *) &pixels[j], 1, 2, fp);
}
g_free (pixels);
pika_progress_update (i / (gdouble) image_height);
}
pika_progress_update (1.0);
fclose (fp);
if (buffer)
g_object_unref (buffer);
return TRUE;
}