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/*
* $Id: ambfile.c 20677 2017-12-18 18:22:52Z yeti-dn $
* Copyright (C) 2005 David Necas (Yeti), Petr Klapetek.
* E-mail: yeti@gwyddion.net, klapetek@gwyddion.net.
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* [FILE-MAGIC-FREEDESKTOP]
* <mime-type type="application/x-ambios-amb">
* <comment>Ambios AMB data</comment>
* <magic priority="80">
* <match type="string" offset="0" value="Binary TrueMap Data File \\ Ambios File Format\r\n"/>
* </magic>
* <glob pattern="*.amb"/>
* <glob pattern="*.AMB"/>
* </mime-type>
**/
/**
* [FILE-MAGIC-FILEMAGIC]
* # Ambios/TrueMap surface (profiles?) data.
* 0 string Binary\ TrueMap\ Data\ File\ \\\ Ambios\ File\ Format\x0d\x0a Ambios/TrueMap surface topography data.
**/
/**
* [FILE-MAGIC-USERGUIDE]
* Ambios AMB
* .amb
* Read[1]
* [1] The import module is unfinished due to the lack of documentation,
* testing files and/or people willing to help with the testing. If you can
* help please contact us.
**/
#include "config.h"
#include <string.h>
#include <libgwyddion/gwymacros.h>
#include <libgwyddion/gwyutils.h>
#include <libgwyddion/gwymath.h>
#include <libprocess/datafield.h>
#include <libgwymodule/gwymodule-file.h>
#include <app/gwyapp.h>
#include <app/gwymoduleutils-file.h>
#include "err.h"
#include "get.h"
#define MAGIC "Binary TrueMap Data File \\ Ambios File Format\r\n"
#define MAGIC_SIZE (sizeof(MAGIC)-1)
#define EXTENSION ".amb"
enum {
HEADER_SIZE = 65,
PARAM_OFFSET = 0x31,
};
static gboolean module_register(void);
static gint amb_detect (const GwyFileDetectInfo *fileinfo,
gboolean only_name);
static GwyContainer* amb_load (const gchar *filename,
GwyRunType mode,
GError **error);
static GwyModuleInfo module_info = {
GWY_MODULE_ABI_VERSION,
&module_register,
N_("Imports Ambios AMB data files."),
"Yeti <yeti@gwyddion.net>",
"0.3",
"David Nečas (Yeti)",
"2011",
};
GWY_MODULE_QUERY2(module_info, ambfile)
static gboolean
module_register(void)
{
gwy_file_func_register("ambfile",
N_("Ambios amb files (.amb)"),
(GwyFileDetectFunc)&amb_detect,
(GwyFileLoadFunc)&amb_load,
NULL,
NULL);
return TRUE;
}
static gint
amb_detect(const GwyFileDetectInfo *fileinfo,
gboolean only_name)
{
if (only_name)
return g_str_has_suffix(fileinfo->name_lowercase, EXTENSION) ? 20 : 0;
if (fileinfo->file_size >= HEADER_SIZE
&& fileinfo->buffer_len >= MAGIC_SIZE
&& memcmp(fileinfo->head, MAGIC, MAGIC_SIZE) == 0)
return 100;
return 0;
}
static GwyContainer*
amb_load(const gchar *filename,
G_GNUC_UNUSED GwyRunType mode,
GError **error)
{
GwyContainer *container = NULL;
guchar *buffer = NULL;
const guchar *p;
gsize size = 0;
GError *err = NULL;
guint xres, yres;
gdouble xreal;
G_GNUC_UNUSED gdouble q;
GwyDataField *dfield;
if (!gwy_file_get_contents(filename, &buffer, &size, &err)) {
err_GET_FILE_CONTENTS(error, &err);
return NULL;
}
if (size <= HEADER_SIZE) {
err_TOO_SHORT(error);
goto fail;
}
/* The two bytes before are usually zeroes */
p = buffer + PARAM_OFFSET;
xres = gwy_get_guint32_le(&p);
yres = gwy_get_guint32_le(&p);
gwy_debug("xres: %u yres: %u", xres, yres);
/* The four bytes after might be a float, then there are four more bytes. */
if (err_DIMENSION(error, xres) || err_DIMENSION(error, yres))
goto fail;
if (err_SIZE_MISMATCH(error, 4*xres*yres + HEADER_SIZE, size, TRUE))
goto fail;
xreal = gwy_get_gfloat_le(&p) * 1e-3;
/* FIXME: I do not know what the second number means. It does not seem to
* be z-scale because z scaling does not change when the number changes. */
q = gwy_get_gfloat_le(&p);
gwy_debug("xreal: %g, q: %g", xreal, q);
dfield = gwy_data_field_new(xres, yres, xreal, xreal, FALSE);
gwy_convert_raw_data(buffer + HEADER_SIZE, xres*yres, 1,
GWY_RAW_DATA_FLOAT, GWY_BYTE_ORDER_LITTLE_ENDIAN,
gwy_data_field_get_data(dfield), 1e-3, 0.0);
gwy_si_unit_set_from_string(gwy_data_field_get_si_unit_xy(dfield), "m");
gwy_si_unit_set_from_string(gwy_data_field_get_si_unit_z(dfield), "m");
container = gwy_container_new();
gwy_container_set_object_by_name(container, "/0/data", dfield);
gwy_container_set_string_by_name(container, "/0/data/title",
g_strdup("Topography"));
gwy_app_channel_check_nonsquare(container, 0);
g_object_unref(dfield);
gwy_file_channel_import_log_add(container, 0, NULL, filename);
fail:
gwy_file_abandon_contents(buffer, size, NULL);
return container;
}
/* vim: set cin et ts=4 sw=4 cino=>1s,e0,n0,f0,{0,}0,^0,\:1s,=0,g1s,h0,t0,+1s,c3,(0,u0 : */
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