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gimp/plug-ins/common/file-gegl.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* file-gegl.c -- GEGL based file format plug-in
* Copyright (C) 2012 Simon Budig <simon@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 <stdlib.h>
#include <errno.h>
#include <glib/gstdio.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
#define PLUG_IN_BINARY "file-gegl"
typedef struct _FileFormat FileFormat;
struct _FileFormat
{
const gchar *file_type;
const gchar *mime_type;
const gchar *extensions;
const gchar *magic;
const gchar *load_proc;
const gchar *load_blurb;
const gchar *load_help;
const gchar *load_op;
const gchar *export_proc;
const gchar *export_blurb;
const gchar *export_help;
const gchar *export_op;
};
typedef struct _Goat Goat;
typedef struct _GoatClass GoatClass;
struct _Goat
{
GimpPlugIn parent_instance;
};
struct _GoatClass
{
GimpPlugInClass parent_class;
};
#define GOAT_TYPE (goat_get_type ())
#define GOAT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GOAT_TYPE, Goat))
GType goat_get_type (void) G_GNUC_CONST;
static GList * goat_query_procedures (GimpPlugIn *plug_in);
static GimpProcedure * goat_create_procedure (GimpPlugIn *plug_in,
const gchar *name);
static GimpValueArray * goat_load (GimpProcedure *procedure,
GimpRunMode run_mode,
GFile *file,
GimpMetadata *metadata,
GimpMetadataLoadFlags *flags,
GimpProcedureConfig *config,
gpointer run_data);
static GimpValueArray * goat_export (GimpProcedure *procedure,
GimpRunMode run_mode,
GimpImage *image,
GFile *file,
GimpMetadata *metadata,
GimpProcedureConfig *config,
gpointer run_data);
static GimpImage * load_image (GFile *file,
const gchar *gegl_op,
GError **error);
static gboolean export_image (GFile *file,
const gchar *gegl_op,
GimpImage *image,
GimpDrawable *drawable,
GError **error);
G_DEFINE_TYPE (Goat, goat, GIMP_TYPE_PLUG_IN)
GIMP_MAIN (GOAT_TYPE)
DEFINE_STD_SET_I18N
static const FileFormat file_formats[] =
{
{
N_("Radiance RGBE"),
"image/vnd.radiance",
"hdr",
"0,string,#?",
"file-rgbe-load",
"Load files in the RGBE file format",
"This procedure loads images in the RGBE format, using gegl:rgbe-load",
"gegl:rgbe-load",
"file-rgbe-export",
"Saves files in the RGBE file format",
"This procedure exports images in the RGBE format, using gegl:rgbe-save",
"gegl:rgbe-save",
},
{
N_("OpenEXR image"),
"image/x-exr",
"exr",
"0,lelong,20000630",
/* no EXR loading (implemented in native GIMP plug-in) */
NULL, NULL, NULL, NULL,
"file-exr-export",
"Saves files in the OpenEXR file format",
"This procedure saves images in the OpenEXR format, using gegl:exr-save",
"gegl:exr-save"
}
};
static void
goat_class_init (GoatClass *klass)
{
GimpPlugInClass *plug_in_class = GIMP_PLUG_IN_CLASS (klass);
plug_in_class->query_procedures = goat_query_procedures;
plug_in_class->create_procedure = goat_create_procedure;
plug_in_class->set_i18n = STD_SET_I18N;
}
static void
goat_init (Goat *goat)
{
}
static GList *
goat_query_procedures (GimpPlugIn *plug_in)
{
GList *list = NULL;
gint i;
for (i = 0; i < G_N_ELEMENTS (file_formats); i++)
{
const FileFormat *format = &file_formats[i];
if (format->load_proc)
list = g_list_append (list, g_strdup (format->load_proc));
if (format->export_proc)
list = g_list_append (list, g_strdup (format->export_proc));
}
return list;
}
static GimpProcedure *
goat_create_procedure (GimpPlugIn *plug_in,
const gchar *name)
{
GimpProcedure *procedure = NULL;
gint i;
for (i = 0; i < G_N_ELEMENTS (file_formats); i++)
{
const FileFormat *format = &file_formats[i];
if (! g_strcmp0 (name, format->load_proc))
{
procedure = gimp_load_procedure_new (plug_in, name,
GIMP_PDB_PROC_TYPE_PLUGIN,
goat_load,
(gpointer) format, NULL);
gimp_procedure_set_menu_label (procedure, format->file_type);
gimp_procedure_set_documentation (procedure,
format->load_blurb,
format->load_help,
name);
gimp_file_procedure_set_mime_types (GIMP_FILE_PROCEDURE (procedure),
format->mime_type);
gimp_file_procedure_set_extensions (GIMP_FILE_PROCEDURE (procedure),
format->extensions);
gimp_file_procedure_set_magics (GIMP_FILE_PROCEDURE (procedure),
format->magic);
}
else if (! g_strcmp0 (name, format->export_proc))
{
procedure = gimp_export_procedure_new (plug_in, name,
GIMP_PDB_PROC_TYPE_PLUGIN,
FALSE, goat_export,
(gpointer) format, NULL);
gimp_procedure_set_image_types (procedure, "*");
gimp_procedure_set_menu_label (procedure, format->file_type);
gimp_procedure_set_documentation (procedure,
format->export_blurb,
format->export_help,
name);
gimp_file_procedure_set_mime_types (GIMP_FILE_PROCEDURE (procedure),
format->mime_type);
gimp_file_procedure_set_extensions (GIMP_FILE_PROCEDURE (procedure),
format->extensions);
}
}
return procedure;
}
static GimpValueArray *
goat_load (GimpProcedure *procedure,
GimpRunMode run_mode,
GFile *file,
GimpMetadata *metadata,
GimpMetadataLoadFlags *flags,
GimpProcedureConfig *config,
gpointer run_data)
{
const FileFormat *format = run_data;
GimpValueArray *return_vals;
GimpImage *image;
GError *error = NULL;
gegl_init (NULL, NULL);
image = load_image (file, format->load_op, &error);
if (! image)
return gimp_procedure_new_return_values (procedure,
GIMP_PDB_EXECUTION_ERROR,
error);
return_vals = gimp_procedure_new_return_values (procedure,
GIMP_PDB_SUCCESS,
NULL);
GIMP_VALUES_SET_IMAGE (return_vals, 1, image);
return return_vals;
}
static GimpValueArray *
goat_export (GimpProcedure *procedure,
GimpRunMode run_mode,
GimpImage *image,
GFile *file,
GimpMetadata *metadata,
GimpProcedureConfig *config,
gpointer run_data)
{
const FileFormat *format = run_data;
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
GimpExportReturn export = GIMP_EXPORT_IGNORE;
GList *drawables;
GError *error = NULL;
gegl_init (NULL, NULL);
export = gimp_export_image (&image,
GIMP_EXPORT_CAN_HANDLE_RGB |
GIMP_EXPORT_CAN_HANDLE_GRAY |
GIMP_EXPORT_CAN_HANDLE_INDEXED |
GIMP_EXPORT_CAN_HANDLE_ALPHA);
drawables = gimp_image_list_layers (image);
if (! export_image (file, format->export_op, image, drawables->data,
&error))
{
status = GIMP_PDB_EXECUTION_ERROR;
}
if (export == GIMP_EXPORT_EXPORT)
gimp_image_delete (image);
g_list_free (drawables);
return gimp_procedure_new_return_values (procedure, status, error);
}
static GimpImage *
load_image (GFile *file,
const gchar *gegl_op,
GError **error)
{
GimpImage *image;
GimpLayer *layer;
GimpImageType image_type;
GimpImageBaseType base_type;
GimpPrecision precision;
gint width;
gint height;
GeglNode *graph;
GeglNode *sink;
GeglNode *source;
GeglBuffer *src_buf = NULL;
GeglBuffer *dest_buf = NULL;
const Babl *format;
gimp_progress_init_printf (_("Opening '%s'"),
gimp_file_get_utf8_name (file));
graph = gegl_node_new ();
source = gegl_node_new_child (graph,
"operation", gegl_op,
"path", g_file_peek_path (file),
NULL);
sink = gegl_node_new_child (graph,
"operation", "gegl:buffer-sink",
"buffer", &src_buf,
NULL);
gegl_node_link (source, sink);
gegl_node_process (sink);
g_object_unref (graph);
if (! src_buf)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("Could not open '%s'"),
gimp_file_get_utf8_name (file));
return NULL;
}
gimp_progress_update (0.33);
width = gegl_buffer_get_width (src_buf);
height = gegl_buffer_get_height (src_buf);
format = gegl_buffer_get_format (src_buf);
if (babl_format_is_palette (format))
{
base_type = GIMP_INDEXED;
if (babl_format_has_alpha (format))
image_type = GIMP_INDEXEDA_IMAGE;
else
image_type = GIMP_INDEXED_IMAGE;
precision = GIMP_PRECISION_U8_NON_LINEAR;
}
else
{
const Babl *model = babl_format_get_model (format);
const Babl *type = babl_format_get_type (format, 0);
gboolean linear = TRUE;
if (model == babl_model ("Y") ||
model == babl_model ("Y'") ||
model == babl_model ("YA") ||
model == babl_model ("Y'A"))
{
base_type = GIMP_GRAY;
if (babl_format_has_alpha (format))
image_type = GIMP_GRAYA_IMAGE;
else
image_type = GIMP_GRAY_IMAGE;
if (model == babl_model ("Y'") ||
model == babl_model ("Y'A"))
linear = FALSE;
}
else
{
base_type = GIMP_RGB;
if (babl_format_has_alpha (format))
image_type = GIMP_RGBA_IMAGE;
else
image_type = GIMP_RGB_IMAGE;
if (model == babl_model ("R'G'B'") ||
model == babl_model ("R'G'B'A"))
linear = FALSE;
}
if (linear)
{
if (type == babl_type ("u8"))
precision = GIMP_PRECISION_U8_LINEAR;
else if (type == babl_type ("u16"))
precision = GIMP_PRECISION_U16_LINEAR;
else if (type == babl_type ("u32"))
precision = GIMP_PRECISION_U32_LINEAR;
else if (type == babl_type ("half"))
precision = GIMP_PRECISION_HALF_LINEAR;
else
precision = GIMP_PRECISION_FLOAT_LINEAR;
}
else
{
if (type == babl_type ("u8"))
precision = GIMP_PRECISION_U8_NON_LINEAR;
else if (type == babl_type ("u16"))
precision = GIMP_PRECISION_U16_NON_LINEAR;
else if (type == babl_type ("u32"))
precision = GIMP_PRECISION_U32_NON_LINEAR;
else if (type == babl_type ("half"))
precision = GIMP_PRECISION_HALF_NON_LINEAR;
else
precision = GIMP_PRECISION_FLOAT_NON_LINEAR;
}
}
image = gimp_image_new_with_precision (width, height,
base_type, precision);
layer = gimp_layer_new (image,
_("Background"),
width, height,
image_type,
100,
gimp_image_get_default_new_layer_mode (image));
gimp_image_insert_layer (image, layer, NULL, 0);
dest_buf = gimp_drawable_get_buffer (GIMP_DRAWABLE (layer));
gimp_progress_update (0.66);
gegl_buffer_copy (src_buf, NULL, GEGL_ABYSS_NONE, dest_buf, NULL);
g_object_unref (src_buf);
g_object_unref (dest_buf);
gimp_progress_update (1.0);
return image;
}
static gboolean
export_image (GFile *file,
const gchar *gegl_op,
GimpImage *image,
GimpDrawable *drawable,
GError **error)
{
GeglNode *graph;
GeglNode *source;
GeglNode *sink;
GeglBuffer *src_buf;
src_buf = gimp_drawable_get_buffer (drawable);
graph = gegl_node_new ();
source = gegl_node_new_child (graph,
"operation", "gegl:buffer-source",
"buffer", src_buf,
NULL);
sink = gegl_node_new_child (graph,
"operation", gegl_op,
"path", g_file_peek_path (file),
NULL);
gegl_node_link (source, sink);
gegl_node_process (sink);
g_object_unref (graph);
g_object_unref (src_buf);
return TRUE;
}
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