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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 <http://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 *save_proc;
const gchar *save_blurb;
const gchar *save_help;
};
static void query (void);
static void run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static gint32 load_image (const gchar *filename,
GError **error);
static gboolean save_image (const gchar *filename,
gint32 image_ID,
gint32 drawable_ID,
GError **error);
static const FileFormat file_formats[] =
{
{
N_("Radiance RGBE"),
"image/vnd.radiance",
"hdr",
"0,string,?#",
"file-load-rgbe",
"Load files in the RGBE file format",
"This procedure loads images in the RGBE format, using gegl:load",
"file-save-rgbe",
"Saves files in the RGBE file format",
"This procedure exports images in the RGBE format, using gegl:save"
},
{
N_("OpenEXR image"),
"image/x-exr",
"exr",
"0,lelong,20000630",
/* no EXR loading (implemented in native GIMP plug-in) */
NULL, NULL, NULL,
"file-exr-save",
"Saves files in the OpenEXR file format",
"This procedure saves images in the OpenEXR format, using gegl:save"
}
};
const GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query proc */
run, /* run_proc */
};
MAIN ()
static void
query (void)
{
static const GimpParamDef load_args[] =
{
{ GIMP_PDB_INT32, "run-mode", "The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }" },
{ GIMP_PDB_STRING, "filename", "The name of the file to load." },
{ GIMP_PDB_STRING, "raw-filename", "The name entered" },
};
static const GimpParamDef load_return_vals[] =
{
{ GIMP_PDB_IMAGE, "image", "Output image" }
};
static const GimpParamDef save_args[] =
{
{ GIMP_PDB_INT32, "run-mode", "The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }" },
{ GIMP_PDB_IMAGE, "image", "Input image" },
{ GIMP_PDB_DRAWABLE, "drawable", "Drawable to save" },
{ GIMP_PDB_STRING, "filename", "The name of the file to save the image in" },
{ GIMP_PDB_STRING, "raw-filename", "The name of the file to save the image in" }
};
gint i;
for (i = 0; i < G_N_ELEMENTS (file_formats); i++)
{
const FileFormat *format = &file_formats[i];
if (format->load_proc)
{
gimp_install_procedure (format->load_proc,
format->load_blurb,
format->load_help,
"Simon Budig",
"Simon Budig",
"2012",
format->file_type,
NULL,
GIMP_PLUGIN,
G_N_ELEMENTS (load_args),
G_N_ELEMENTS (load_return_vals),
load_args, load_return_vals);
gimp_register_file_handler_mime (format->load_proc,
format->mime_type);
gimp_register_magic_load_handler (format->load_proc,
format->extensions,
"",
format->magic);
}
if (format->save_proc)
{
gimp_install_procedure (format->save_proc,
format->save_blurb,
format->save_help,
"Simon Budig",
"Simon Budig",
"2012",
format->file_type,
"*",
GIMP_PLUGIN,
G_N_ELEMENTS (save_args), 0,
save_args, NULL);
gimp_register_file_handler_mime (format->save_proc,
format->mime_type);
gimp_register_save_handler (format->save_proc,
format->extensions, "");
}
}
}
static void
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[2];
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
GimpRunMode run_mode;
gint image_ID;
gint drawable_ID;
GError *error = NULL;
gint i;
INIT_I18N ();
gegl_init (NULL, NULL);
run_mode = param[0].data.d_int32;
*nreturn_vals = 1;
*return_vals = values;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = GIMP_PDB_EXECUTION_ERROR;
for (i = 0; i < G_N_ELEMENTS (file_formats); i++)
{
const FileFormat *format = &file_formats[i];
if (format->load_proc && !strcmp (name, format->load_proc))
{
image_ID = load_image (param[1].data.d_string, &error);
if (image_ID != -1)
{
*nreturn_vals = 2;
values[1].type = GIMP_PDB_IMAGE;
values[1].data.d_image = image_ID;
}
else
{
status = GIMP_PDB_EXECUTION_ERROR;
}
break;
}
else if (format->save_proc && !strcmp (name, format->save_proc))
{
GimpExportReturn export = GIMP_EXPORT_CANCEL;
image_ID = param[1].data.d_int32;
drawable_ID = param[2].data.d_int32;
/* eventually export the image */
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
case GIMP_RUN_WITH_LAST_VALS:
gimp_ui_init (PLUG_IN_BINARY, FALSE);
export = gimp_export_image (&image_ID, &drawable_ID, "GEGL",
GIMP_EXPORT_CAN_HANDLE_RGB |
GIMP_EXPORT_CAN_HANDLE_GRAY |
GIMP_EXPORT_CAN_HANDLE_INDEXED |
GIMP_EXPORT_CAN_HANDLE_ALPHA);
if (export == GIMP_EXPORT_CANCEL)
{
*nreturn_vals = 1;
values[0].data.d_status = GIMP_PDB_CANCEL;
return;
}
break;
default:
break;
}
if (! save_image (param[3].data.d_string, image_ID, drawable_ID,
&error))
{
status = GIMP_PDB_EXECUTION_ERROR;
}
if (export == GIMP_EXPORT_EXPORT)
gimp_image_delete (image_ID);
break;
}
}
if (i == G_N_ELEMENTS (file_formats))
status = GIMP_PDB_CALLING_ERROR;
if (status != GIMP_PDB_SUCCESS && error)
{
*nreturn_vals = 2;
values[1].type = GIMP_PDB_STRING;
values[1].data.d_string = error->message;
}
values[0].data.d_status = status;
gegl_exit ();
}
static gint32
load_image (const gchar *filename,
GError **error)
{
gint32 image_ID = -1;
gint32 layer_ID;
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_filename_to_utf8 (filename));
graph = gegl_node_new ();
source = gegl_node_new_child (graph,
"operation", "gegl:load",
"path", filename,
NULL);
sink = gegl_node_new_child (graph,
"operation", "gegl:buffer-sink",
"buffer", &src_buf,
NULL);
gegl_node_connect_to (source, "output",
sink, "input");
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_filename_to_utf8 (filename));
return -1;
}
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_GAMMA;
}
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_GAMMA;
else if (type == babl_type ("u16"))
precision = GIMP_PRECISION_U16_GAMMA;
else if (type == babl_type ("u32"))
precision = GIMP_PRECISION_U32_GAMMA;
else if (type == babl_type ("half"))
precision = GIMP_PRECISION_HALF_GAMMA;
else
precision = GIMP_PRECISION_FLOAT_GAMMA;
}
}
image_ID = gimp_image_new_with_precision (width, height,
base_type, precision);
gimp_image_set_filename (image_ID, filename);
layer_ID = gimp_layer_new (image_ID,
_("Background"),
width, height,
image_type,
100,
gimp_image_get_default_new_layer_mode (image_ID));
gimp_image_insert_layer (image_ID, layer_ID, -1, 0);
dest_buf = gimp_drawable_get_buffer (layer_ID);
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_ID;
}
static gboolean
save_image (const gchar *filename,
gint32 image_ID,
gint32 drawable_ID,
GError **error)
{
GeglNode *graph;
GeglNode *source;
GeglNode *sink;
GeglBuffer *src_buf;
src_buf = gimp_drawable_get_buffer (drawable_ID);
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:save",
"path", filename,
NULL);
gegl_node_connect_to (source, "output",
sink, "input");
gegl_node_process (sink);
g_object_unref (graph);
g_object_unref (src_buf);
return TRUE;
}
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