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gimp/app/xcf/xcf.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* 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 <errno.h>
#include <stdlib.h>
#include <string.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <glib/gstdio.h>
#include <gegl.h>
#include "libgimpbase/gimpbase.h"
#include "core/core-types.h"
#include "core/gimp.h"
#include "core/gimpimage.h"
#include "core/gimpdrawable.h"
#include "core/gimpparamspecs.h"
#include "core/gimpprogress.h"
#include "plug-in/gimppluginmanager.h"
#include "plug-in/gimppluginprocedure.h"
#include "xcf.h"
#include "xcf-private.h"
#include "xcf-load.h"
#include "xcf-read.h"
#include "xcf-save.h"
#include "gimp-intl.h"
typedef GimpImage * GimpXcfLoaderFunc (Gimp *gimp,
XcfInfo *info,
GError **error);
static GimpValueArray * xcf_load_invoker (GimpProcedure *procedure,
Gimp *gimp,
GimpContext *context,
GimpProgress *progress,
const GimpValueArray *args,
GError **error);
static GimpValueArray * xcf_save_invoker (GimpProcedure *procedure,
Gimp *gimp,
GimpContext *context,
GimpProgress *progress,
const GimpValueArray *args,
GError **error);
static GimpXcfLoaderFunc * const xcf_loaders[] =
{
xcf_load_image, /* version 0 */
xcf_load_image, /* version 1 */
xcf_load_image, /* version 2 */
xcf_load_image, /* version 3 */
xcf_load_image, /* version 4 */
xcf_load_image, /* version 5 */
xcf_load_image, /* version 6 */
xcf_load_image, /* version 7 */
xcf_load_image, /* version 8 */
xcf_load_image, /* version 9 */
xcf_load_image, /* version 10 */
xcf_load_image, /* version 11 */
xcf_load_image, /* version 12 */
xcf_load_image, /* version 13 */
xcf_load_image, /* version 14 */
xcf_load_image, /* version 15 */
xcf_load_image, /* version 16 */
xcf_load_image, /* version 17 */
xcf_load_image, /* version 18 */
xcf_load_image, /* version 19 */
xcf_load_image, /* version 20 */
xcf_load_image, /* version 21 */
xcf_load_image, /* version 22 */
};
void
xcf_init (Gimp *gimp)
{
GimpPlugInProcedure *proc;
GFile *file;
GimpProcedure *procedure;
g_return_if_fail (GIMP_IS_GIMP (gimp));
/* So this is sort of a hack, but its better than it was before. To
* do this right there would be a file load-save handler type and
* the whole interface would change but there isn't, and currently
* the plug-in structure contains all the load-save info, so it
* makes sense to use that for the XCF load/save handlers, even
* though they are internal. The only thing it requires is using a
* PlugInProcDef struct. -josh
*/
/* gimp-xcf-save */
file = g_file_new_for_path ("gimp-xcf-save");
procedure = gimp_plug_in_procedure_new (GIMP_PDB_PROC_TYPE_PLUGIN, file);
g_object_unref (file);
procedure->proc_type = GIMP_PDB_PROC_TYPE_INTERNAL;
procedure->marshal_func = xcf_save_invoker;
proc = GIMP_PLUG_IN_PROCEDURE (procedure);
proc->menu_label = g_strdup (_("GIMP XCF image"));
gimp_plug_in_procedure_set_icon (proc, GIMP_ICON_TYPE_ICON_NAME,
(const guint8 *) "gimp-wilber",
strlen ("gimp-wilber") + 1,
NULL);
gimp_plug_in_procedure_set_image_types (proc, "RGB*, GRAY*, INDEXED*");
gimp_plug_in_procedure_set_file_proc (proc, "xcf", "", NULL);
gimp_plug_in_procedure_set_mime_types (proc, "image/x-xcf");
gimp_plug_in_procedure_set_handles_remote (proc);
gimp_object_set_static_name (GIMP_OBJECT (procedure), "gimp-xcf-save");
gimp_procedure_set_static_help (procedure,
"Saves file in the .xcf file format",
"The XCF file format has been designed "
"specifically for loading and saving "
"tiled and layered images in GIMP. "
"This procedure will save the specified "
"image in the xcf file format.",
NULL);
gimp_procedure_set_static_attribution (procedure,
"Spencer Kimball & Peter Mattis",
"Spencer Kimball & Peter Mattis",
"1995-1996");
gimp_procedure_add_argument (procedure,
gimp_param_spec_enum ("run-mode",
"Dummy Param",
"Dummy parameter",
GIMP_TYPE_RUN_MODE,
GIMP_RUN_INTERACTIVE,
GIMP_PARAM_READWRITE));
gimp_procedure_add_argument (procedure,
gimp_param_spec_image ("image",
"Image",
"Input image",
FALSE,
GIMP_PARAM_READWRITE));
gimp_procedure_add_argument (procedure,
g_param_spec_object ("file",
"File",
"The file "
"to save the image in",
G_TYPE_FILE,
GIMP_PARAM_READWRITE));
gimp_plug_in_manager_add_procedure (gimp->plug_in_manager, proc);
g_object_unref (procedure);
/* gimp-xcf-load */
file = g_file_new_for_path ("gimp-xcf-load");
procedure = gimp_plug_in_procedure_new (GIMP_PDB_PROC_TYPE_PLUGIN, file);
g_object_unref (file);
procedure->proc_type = GIMP_PDB_PROC_TYPE_INTERNAL;
procedure->marshal_func = xcf_load_invoker;
proc = GIMP_PLUG_IN_PROCEDURE (procedure);
proc->menu_label = g_strdup (_("GIMP XCF image"));
gimp_plug_in_procedure_set_icon (proc, GIMP_ICON_TYPE_ICON_NAME,
(const guint8 *) "gimp-wilber",
strlen ("gimp-wilber") + 1,
NULL);
gimp_plug_in_procedure_set_image_types (proc, NULL);
gimp_plug_in_procedure_set_file_proc (proc, "xcf", "",
"0,string,gimp\\040xcf\\040");
gimp_plug_in_procedure_set_mime_types (proc, "image/x-xcf");
gimp_plug_in_procedure_set_handles_remote (proc);
gimp_object_set_static_name (GIMP_OBJECT (procedure), "gimp-xcf-load");
gimp_procedure_set_static_help (procedure,
"Loads file saved in the .xcf file format",
"The XCF file format has been designed "
"specifically for loading and saving "
"tiled and layered images in GIMP. "
"This procedure will load the specified "
"file.",
NULL);
gimp_procedure_set_static_attribution (procedure,
"Spencer Kimball & Peter Mattis",
"Spencer Kimball & Peter Mattis",
"1995-1996");
gimp_procedure_add_argument (procedure,
gimp_param_spec_enum ("run-mode",
"Dummy Param",
"Dummy parameter",
GIMP_TYPE_RUN_MODE,
GIMP_RUN_INTERACTIVE,
GIMP_PARAM_READWRITE));
gimp_procedure_add_argument (procedure,
g_param_spec_object ("file",
"File",
"The file to load",
G_TYPE_FILE,
GIMP_PARAM_READWRITE));
gimp_procedure_add_return_value (procedure,
gimp_param_spec_image ("image",
"Image",
"Output image",
FALSE,
GIMP_PARAM_READWRITE));
gimp_plug_in_manager_add_procedure (gimp->plug_in_manager, proc);
g_object_unref (procedure);
}
void
xcf_exit (Gimp *gimp)
{
g_return_if_fail (GIMP_IS_GIMP (gimp));
}
GimpImage *
xcf_load_stream (Gimp *gimp,
GInputStream *input,
GFile *input_file,
GimpProgress *progress,
GError **error)
{
XcfInfo info = { 0, };
const gchar *filename;
GimpImage *image = NULL;
gchar id[14];
gboolean success;
g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
g_return_val_if_fail (G_IS_INPUT_STREAM (input), NULL);
g_return_val_if_fail (input_file == NULL || G_IS_FILE (input_file), NULL);
g_return_val_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
if (input_file)
filename = gimp_file_get_utf8_name (input_file);
else
filename = _("Memory Stream");
info.gimp = gimp;
info.input = input;
info.seekable = G_SEEKABLE (input);
info.bytes_per_offset = 4;
info.progress = progress;
info.file = input_file;
info.compression = COMPRESS_NONE;
if (progress)
gimp_progress_start (progress, FALSE, _("Opening '%s'"), filename);
success = TRUE;
xcf_read_int8 (&info, (guint8 *) id, 14);
if (! g_str_has_prefix (id, "gimp xcf "))
{
success = FALSE;
}
else if (strcmp (id + 9, "file") == 0)
{
info.file_version = 0;
}
else if (id[9] == 'v' &&
id[13] == '\0')
{
info.file_version = atoi (id + 10);
}
else
{
success = FALSE;
}
if (info.file_version >= 11)
info.bytes_per_offset = 8;
if (success)
{
if (info.file_version >= 0 &&
info.file_version < G_N_ELEMENTS (xcf_loaders))
{
image = (*(xcf_loaders[info.file_version])) (gimp, &info, error);
if (! image)
success = FALSE;
g_input_stream_close (info.input, NULL, NULL);
}
else
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("XCF error: unsupported XCF file version %d "
"encountered"), info.file_version);
success = FALSE;
}
}
if (progress)
gimp_progress_end (progress);
return image;
}
gboolean
xcf_save_stream (Gimp *gimp,
GimpImage *image,
GOutputStream *output,
GFile *output_file,
GimpProgress *progress,
GError **error)
{
XcfInfo info = { 0, };
const gchar *filename;
gboolean success = FALSE;
GError *my_error = NULL;
GCancellable *cancellable;
g_return_val_if_fail (GIMP_IS_GIMP (gimp), FALSE);
g_return_val_if_fail (GIMP_IS_IMAGE (image), FALSE);
g_return_val_if_fail (G_IS_OUTPUT_STREAM (output), FALSE);
g_return_val_if_fail (output_file == NULL || G_IS_FILE (output_file), FALSE);
g_return_val_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress), FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
if (output_file)
filename = gimp_file_get_utf8_name (output_file);
else
filename = _("Memory Stream");
info.gimp = gimp;
info.output = output;
info.seekable = G_SEEKABLE (output);
info.bytes_per_offset = 4;
info.progress = progress;
info.file = output_file;
if (gimp_image_get_xcf_compression (image))
info.compression = COMPRESS_ZLIB;
else
info.compression = COMPRESS_RLE;
info.file_version = gimp_image_get_xcf_version (image,
info.compression ==
COMPRESS_ZLIB,
NULL, NULL, NULL);
if (info.file_version >= 11)
info.bytes_per_offset = 8;
if (progress)
gimp_progress_start (progress, FALSE, _("Saving '%s'"), filename);
success = xcf_save_image (&info, image, &my_error);
cancellable = g_cancellable_new ();
if (success)
{
if (progress)
gimp_progress_set_text (progress, _("Closing '%s'"), filename);
}
else
{
/* When closing the stream, the image will be actually saved,
* unless we properly cancel it with a GCancellable.
* Not closing the stream is not an option either, as this will
* happen anyway when finalizing the output.
* So let's make sure now that we don't overwrite the XCF file
* when an error occurred.
*/
g_cancellable_cancel (cancellable);
}
success = g_output_stream_close (info.output, cancellable, &my_error);
g_object_unref (cancellable);
if (! success && my_error)
g_propagate_prefixed_error (error, my_error,
_("Error writing '%s': "), filename);
if (progress)
gimp_progress_end (progress);
return success;
}
/* private functions */
static GimpValueArray *
xcf_load_invoker (GimpProcedure *procedure,
Gimp *gimp,
GimpContext *context,
GimpProgress *progress,
const GimpValueArray *args,
GError **error)
{
GimpValueArray *return_vals;
GimpImage *image = NULL;
GFile *file;
GInputStream *input;
GError *my_error = NULL;
gimp_set_busy (gimp);
file = g_value_get_object (gimp_value_array_index (args, 1));
input = G_INPUT_STREAM (g_file_read (file, NULL, &my_error));
if (input)
{
image = xcf_load_stream (gimp, input, file, progress, error);
g_object_unref (input);
}
else
{
g_propagate_prefixed_error (error, my_error,
_("Could not open '%s' for reading: "),
gimp_file_get_utf8_name (file));
}
return_vals = gimp_procedure_get_return_values (procedure, image != NULL,
error ? *error : NULL);
if (image)
g_value_set_object (gimp_value_array_index (return_vals, 1), image);
gimp_unset_busy (gimp);
return return_vals;
}
static GimpValueArray *
xcf_save_invoker (GimpProcedure *procedure,
Gimp *gimp,
GimpContext *context,
GimpProgress *progress,
const GimpValueArray *args,
GError **error)
{
GimpValueArray *return_vals;
GimpImage *image;
GFile *file;
GOutputStream *output;
gboolean success = FALSE;
GError *my_error = NULL;
gimp_set_busy (gimp);
image = g_value_get_object (gimp_value_array_index (args, 1));
file = g_value_get_object (gimp_value_array_index (args, 2));
output = G_OUTPUT_STREAM (g_file_replace (file,
NULL, FALSE, G_FILE_CREATE_NONE,
NULL, &my_error));
if (output)
{
success = xcf_save_stream (gimp, image, output, file, progress, error);
g_object_unref (output);
}
else
{
g_propagate_prefixed_error (error, my_error,
_("Error creating '%s': "),
gimp_file_get_utf8_name (file));
}
return_vals = gimp_procedure_get_return_values (procedure, success,
error ? *error : NULL);
gimp_unset_busy (gimp);
return return_vals;
}
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