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Gimp/plug-ins/file-compressor/file-compressor.c
Michael Natterer 517dd7d142 Make it harder to "save" to foo.png.gz or "export" to foo.xcf.gz 
Remove plain .gz .bz2 .xz from the extensions the file-compressor
plug-in registers, and make sure is only ends up in "save_procs", so
at least "exporting" to foo.xcf.gz is not possible any longer. With
some effort, one can still "save" to foo.png.gz tho, but it's much
harder now.
(cherry picked from commit 086793d040)
2013-02-15 00:08:41 +01:00

766 lines
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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
* Copyright (C) 1997 Daniel Risacher, magnus@alum.mit.edu
*
* 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/>.
*/
/* Minor changes to support file magic */
/* 4 Oct 1997 -- Risacher */
/* compressor plug-in for GIMP */
/* based on gz.c which in turn is */
/* loosley based on url.c by */
/* Josh MacDonald, jmacd@cs.berkeley.edu */
/* and, very loosely on hrz.c by */
/* Albert Cahalan <acahalan at cs.uml.edu> */
/* This is reads and writes compressed image files for GIMP
*
* It should work with file names of the form
* filename.foo.[gz|bz2] where foo is some already-recognized extension
*
* and it also works for names of the form
* filename.xcf[gz|bz2] - which is equivalent to
* filename.xcf.[gz|bz2]
*
* I added the xcfgz bit because having a default extension of xcf.gz
* can confuse the file selection dialog box somewhat, forcing the
* user to type sometimes when he/she otherwise wouldn't need to.
*
* I later decided I didn't like it because I don't like to bloat
* the file-extension namespace. But I left in the recognition
* feature/bug so if people want to use files named foo.xcfgz by
* default, they can just hack their pluginrc file.
*
* to do this hack, change :
* "xcf.gz,gz,xcfgz"
* to
* "xcfgz,gz,xcf.gz"
*
*
* -Dan Risacher, 0430 CDT, 26 May 1997
*/
#include "config.h"
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#ifdef HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
#include <sys/stat.h>
#include <fcntl.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <glib/gstdio.h>
#ifndef _O_BINARY
#define _O_BINARY 0
#endif
#include <libgimp/gimp.h>
#include "libgimp/stdplugins-intl.h"
#include <zlib.h>
#include <bzlib.h>
/* Author 1: Josh MacDonald (url.c) */
/* Author 2: Daniel Risacher (gz.c) */
/* Author 3: Michael Natterer (compressor.c) */
/* According to USAF Lt Steve Werhle, US DoD software development
* contracts average about $25 USD per source line of code (SLOC). By
* that metric, I figure this plug-in is worth about $10,000 USD */
/* But you got it free. Magic of Gnu. */
typedef gboolean (*LoadFn) (const char *infile,
const char *outfile);
typedef gboolean (*SaveFn) (const char *infile,
const char *outfile);
typedef struct _Compressor Compressor;
struct _Compressor
{
const gchar *file_type;
const gchar *mime_type;
const gchar *extensions;
const gchar *magic;
const gchar *xcf_extension;
const gchar *generic_extension;
const gchar *load_proc;
const gchar *load_blurb;
const gchar *load_help;
LoadFn load_fn;
const gchar *save_proc;
const gchar *save_blurb;
const gchar *save_help;
SaveFn save_fn;
};
static void query (void);
static void run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static GimpPDBStatusType save_image (const Compressor *compressor,
const gchar *filename,
gint32 image_ID,
gint32 drawable_ID,
gint32 run_mode,
GError **error);
static gint32 load_image (const Compressor *compressor,
const gchar *filename,
gint32 run_mode,
GimpPDBStatusType *status,
GError **error);
static gboolean valid_file (const gchar *filename);
static const gchar * find_extension (const Compressor *compressor,
const gchar *filename);
static gboolean
gzip_load (const char *infile,
const char *outfile);
static gboolean
gzip_save (const char *infile,
const char *outfile);
static gboolean
bzip2_load (const char *infile,
const char *outfile);
static gboolean
bzip2_save (const char *infile,
const char *outfile);
static const Compressor compressors[] =
{
{
N_("gzip archive"),
"application/x-gzip",
"xcf.gz,xcfgz", /* FIXME "xcf.gz,gz,xcfgz" */
"0,string,\037\213",
".xcfgz",
".gz",
"file-gz-load",
"loads files compressed with gzip",
"This procedure loads files in the gzip compressed format.",
gzip_load,
"file-gz-save",
"saves files compressed with gzip",
"This procedure saves files in the gzip compressed format.",
gzip_save
},
{
N_("bzip archive"),
"application/x-bzip",
"xcf.bz2,xcfbz2", /* FIXME "xcf.bz2,bz2,xcfbz2" */
"0,string,BZh",
".xcfbz2",
".bz2",
"file-bz2-load",
"loads files compressed with bzip2",
"This procedure loads files in the bzip2 compressed format.",
bzip2_load,
"file-bz2-save",
"saves files compressed with bzip2",
"This procedure saves files in the bzip2 compressed format.",
bzip2_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 entered" },
};
gint i;
for (i = 0; i < G_N_ELEMENTS (compressors); i++)
{
const Compressor *compressor = &compressors[i];
gimp_install_procedure (compressor->load_proc,
compressor->load_blurb,
compressor->load_help,
"Daniel Risacher",
"Daniel Risacher, Spencer Kimball and Peter Mattis",
"1995-1997",
compressor->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 (compressor->load_proc,
compressor->mime_type);
gimp_register_magic_load_handler (compressor->load_proc,
compressor->extensions,
"",
compressor->magic);
gimp_install_procedure (compressor->save_proc,
compressor->save_blurb,
compressor->save_help,
"Daniel Risacher",
"Daniel Risacher, Spencer Kimball and Peter Mattis",
"1995-1997",
compressor->file_type,
"RGB*, GRAY*, INDEXED*",
GIMP_PLUGIN,
G_N_ELEMENTS (save_args), 0,
save_args, NULL);
gimp_register_file_handler_mime (compressor->save_proc,
compressor->mime_type);
gimp_register_save_handler (compressor->save_proc,
compressor->extensions, "");
}
}
static void
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[2];
GimpRunMode run_mode;
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
GError *error = NULL;
gint32 image_ID;
gint i;
run_mode = param[0].data.d_int32;
INIT_I18N();
*nreturn_vals = 1;
*return_vals = values;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = GIMP_PDB_EXECUTION_ERROR;
/* We handle PDB errors by forwarding them to the caller in
* our return values.
*/
gimp_plugin_set_pdb_error_handler (GIMP_PDB_ERROR_HANDLER_PLUGIN);
for (i = 0; i < G_N_ELEMENTS (compressors); i++)
{
const Compressor *compressor = &compressors[i];
if (! strcmp (name, compressor->load_proc))
{
image_ID = load_image (compressor,
param[1].data.d_string,
param[0].data.d_int32,
&status, &error);
if (image_ID != -1 && status == GIMP_PDB_SUCCESS)
{
*nreturn_vals = 2;
values[1].type = GIMP_PDB_IMAGE;
values[1].data.d_image = image_ID;
}
break;
}
else if (! strcmp (name, compressor->save_proc))
{
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
break;
case GIMP_RUN_NONINTERACTIVE:
/* Make sure all the arguments are there! */
if (nparams != 5)
status = GIMP_PDB_CALLING_ERROR;
break;
case GIMP_RUN_WITH_LAST_VALS:
break;
default:
break;
}
if (status == GIMP_PDB_SUCCESS)
status = save_image (compressor,
param[3].data.d_string,
param[1].data.d_int32,
param[2].data.d_int32,
param[0].data.d_int32,
&error);
break;
}
}
if (i == G_N_ELEMENTS (compressors))
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;
}
static GimpPDBStatusType
save_image (const Compressor *compressor,
const gchar *filename,
gint32 image_ID,
gint32 drawable_ID,
gint32 run_mode,
GError **error)
{
const gchar *ext;
gchar *tmpname;
ext = find_extension (compressor, filename);
if (! ext)
{
g_message (_("No sensible file extension, saving as compressed XCF."));
ext = ".xcf";
}
/* get a temp name with the right extension and save into it. */
tmpname = gimp_temp_name (ext + 1);
if (! (gimp_file_save (run_mode,
image_ID,
drawable_ID,
tmpname,
tmpname) && valid_file (tmpname)))
{
g_unlink (tmpname);
g_free (tmpname);
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
"%s", gimp_get_pdb_error ());
return GIMP_PDB_EXECUTION_ERROR;
}
if (!compressor->save_fn (tmpname, filename))
{
g_unlink (tmpname);
g_free (tmpname);
return GIMP_PDB_EXECUTION_ERROR;
}
g_unlink (tmpname);
g_free (tmpname);
/* ask the core to save a thumbnail for compressed XCF files */
if (strcmp (ext, ".xcf") == 0)
gimp_file_save_thumbnail (image_ID, filename);
return GIMP_PDB_SUCCESS;
}
static gint32
load_image (const Compressor *compressor,
const gchar *filename,
gint32 run_mode,
GimpPDBStatusType *status,
GError **error)
{
gint32 image_ID;
const gchar *ext;
gchar *tmpname;
ext = find_extension (compressor, filename);
if (! ext)
{
g_message (_("No sensible file extension, "
"attempting to load with file magic."));
ext = ".foo";
}
/* find a temp name */
tmpname = gimp_temp_name (ext + 1);
if (!compressor->load_fn (filename, tmpname))
{
g_free (tmpname);
*status = GIMP_PDB_EXECUTION_ERROR;
return -1;
}
/* now that we uncompressed it, load the temp file */
image_ID = gimp_file_load (run_mode, tmpname, tmpname);
g_unlink (tmpname);
g_free (tmpname);
if (image_ID != -1)
{
*status = GIMP_PDB_SUCCESS;
gimp_image_set_filename (image_ID, filename);
}
else
{
*status = GIMP_PDB_EXECUTION_ERROR;
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
"%s", gimp_get_pdb_error ());
}
return image_ID;
}
static gboolean
valid_file (const gchar *filename)
{
struct stat buf;
return g_stat (filename, &buf) == 0 && buf.st_size > 0;
}
static const gchar *
find_extension (const Compressor *compressor,
const gchar *filename)
{
gchar *filename_copy;
gchar *ext;
/* we never free this copy - aren't we evil! */
filename_copy = g_strdup (filename);
/* find the extension, boy! */
ext = strrchr (filename_copy, '.');
while (TRUE)
{
if (!ext || ext[1] == '\0' || strchr (ext, G_DIR_SEPARATOR))
{
return NULL;
}
if (0 == g_ascii_strcasecmp (ext, compressor->xcf_extension))
{
return ".xcf"; /* we've found it */
}
if (0 != g_ascii_strcasecmp (ext, compressor->generic_extension))
{
return ext;
}
else
{
/* we found ".gz" so strip it, loop back, and look again */
*ext = '\0';
ext = strrchr (filename_copy, '.');
}
}
}
static gboolean
gzip_load (const char *infile,
const char *outfile)
{
gboolean ret;
int fd;
gzFile in;
FILE *out;
char buf[16384];
int len;
ret = FALSE;
in = NULL;
out = NULL;
fd = g_open (infile, O_RDONLY | _O_BINARY, 0);
if (fd == -1)
goto out;
in = gzdopen (fd, "rb");
if (!in)
{
close (fd);
goto out;
}
out = g_fopen (outfile, "wb");
if (!out)
goto out;
while (TRUE)
{
len = gzread (in, buf, sizeof buf);
if (len < 0)
break;
else if (len == 0)
{
ret = TRUE;
break;
}
if (fwrite(buf, 1, len, out) != len)
break;
}
out:
/* There is no need to close(fd) as it is closed by gzclose(). */
if (in)
if (gzclose (in) != Z_OK)
ret = FALSE;
if (out)
fclose (out);
return ret;
}
static gboolean
gzip_save (const char *infile,
const char *outfile)
{
gboolean ret;
FILE *in;
int fd;
gzFile out;
char buf[16384];
int len;
ret = FALSE;
in = NULL;
out = NULL;
in = g_fopen (infile, "rb");
if (!in)
goto out;
fd = g_open (outfile, O_CREAT | O_WRONLY | _O_BINARY, 0664);
if (fd == -1)
goto out;
out = gzdopen (fd, "wb");
if (!out)
{
close (fd);
goto out;
}
while (TRUE)
{
len = fread (buf, 1, sizeof buf, in);
if (ferror (in))
break;
if (len < 0)
break;
else if (len == 0)
{
ret = TRUE;
break;
}
if (gzwrite (out, buf, len) != len)
break;
}
out:
if (in)
fclose (in);
/* There is no need to close(fd) as it is closed by gzclose(). */
if (out)
if (gzclose (out) != Z_OK)
ret = FALSE;
return ret;
}
static gboolean
bzip2_load (const char *infile,
const char *outfile)
{
gboolean ret;
int fd;
BZFILE *in;
FILE *out;
char buf[16384];
int len;
ret = FALSE;
in = NULL;
out = NULL;
fd = g_open (infile, O_RDONLY | _O_BINARY, 0);
if (fd == -1)
goto out;
in = BZ2_bzdopen (fd, "rb");
if (!in)
{
close (fd);
goto out;
}
out = g_fopen (outfile, "wb");
if (!out)
goto out;
while (TRUE)
{
len = BZ2_bzread (in, buf, sizeof buf);
if (len < 0)
break;
else if (len == 0)
{
ret = TRUE;
break;
}
if (fwrite(buf, 1, len, out) != len)
break;
}
out:
/* TODO: Check this in the case of BZ2_bzclose(): */
/* There is no need to close(fd) as it is closed by BZ2_bzclose(). */
if (in)
BZ2_bzclose (in);
if (out)
fclose (out);
return ret;
}
static gboolean
bzip2_save (const char *infile,
const char *outfile)
{
gboolean ret;
FILE *in;
int fd;
BZFILE *out;
char buf[16384];
int len;
ret = FALSE;
in = NULL;
out = NULL;
in = g_fopen (infile, "rb");
if (!in)
goto out;
fd = g_open (outfile, O_CREAT | O_WRONLY | _O_BINARY, 0664);
if (fd == -1)
goto out;
out = BZ2_bzdopen (fd, "wb");
if (!out)
{
close (fd);
goto out;
}
while (TRUE)
{
len = fread (buf, 1, sizeof buf, in);
if (ferror (in))
break;
if (len < 0)
break;
else if (len == 0)
{
ret = TRUE;
break;
}
if (BZ2_bzwrite (out, buf, len) != len)
break;
}
out:
if (in)
fclose (in);
/* TODO: Check this in the case of BZ2_bzclose(): */
/* There is no need to close(fd) as it is closed by BZ2_bzclose(). */
if (out)
BZ2_bzclose (out);
return ret;
}
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