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/*
* $Id: burleigh_exp.c 20677 2017-12-18 18:22:52Z yeti-dn $
* Copyright (C) 2007 David Necas (Yeti).
* E-mail: yeti@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-burleigh-export-spm">
* <comment>Burleigh exported SPM data</comment>
* <magic priority="80">
* <match type="string" offset="0" value=".Image Data"/>
* </magic>
* </mime-type>
**/
/**
* [FILE-MAGIC-USERGUIDE]
* Burleigh exported data
* .txt .bin
* Read
**/
#include "config.h"
#include <stdlib.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/gwymoduleutils-file.h>
#include <app/data-browser.h>
#include "err.h"
#define EXTENSION_TEXT ".txt"
#define EXTENSION_BIN ".bin"
#define MAGIC ".Image Data"
#define MAGIC_SIZE (sizeof(MAGIC)-1)
#define MIN_FILE_SIZE 120
typedef struct {
gint xres;
gint yres;
gdouble xscale;
gdouble yscale;
gdouble zscale;
gdouble zres;
GwySIUnit *xyunits;
GwySIUnit *zunits;
gboolean binary;
guint length;
guint bpp;
} BurleighExpHeader;
static gboolean module_register (void);
static gint burleigh_exp_detect (const GwyFileDetectInfo *fileinfo,
gboolean only_name);
static GwyContainer* burleigh_exp_load (const gchar *filename,
GwyRunType mode,
GError **error);
static gboolean burleigh_exp_read_header(BurleighExpHeader *header,
gchar *buf,
GError **error);
static void free_header (BurleighExpHeader *header);
static GwyModuleInfo module_info = {
GWY_MODULE_ABI_VERSION,
&module_register,
N_("Imports Burleigh text/bin exported images."),
"Yeti <yeti@gwyddion.net>",
"0.2",
"David Nečas (Yeti)",
"2007",
};
GWY_MODULE_QUERY2(module_info, burleigh_exp)
static gboolean
module_register(void)
{
gwy_file_func_register("burleigh_exp",
N_("Burleigh exported data (.txt, .bin)"),
(GwyFileDetectFunc)&burleigh_exp_detect,
(GwyFileLoadFunc)&burleigh_exp_load,
NULL,
NULL);
return TRUE;
}
static gint
burleigh_exp_detect(const GwyFileDetectInfo *fileinfo,
gboolean only_name)
{
if (only_name)
return 0;
if (fileinfo->buffer_len < MIN_FILE_SIZE+1)
return 0;
if (memcmp(fileinfo->head, MAGIC, MAGIC_SIZE) == 0)
return 100;
return 0;
}
static GwyContainer*
burleigh_exp_load(const gchar *filename,
G_GNUC_UNUSED GwyRunType mode,
GError **error)
{
GwyContainer *container = NULL;
gchar *buffer = NULL;
BurleighExpHeader header;
gsize size = 0;
GError *err = NULL;
GwyDataField *dfield;
gdouble *data;
guint i, n;
if (!g_file_get_contents(filename, &buffer, &size, &err)) {
err_GET_FILE_CONTENTS(error, &err);
return NULL;
}
if (size < MIN_FILE_SIZE + 2) {
err_TOO_SHORT(error);
g_free(buffer);
return NULL;
}
if (!burleigh_exp_read_header(&header, buffer, error))
goto fail;
n = header.xres * header.yres;
if (header.binary) {
if (header.bpp != 16) {
err_BPP(error, header.bpp);
goto fail;
}
else if (err_SIZE_MISMATCH(error, header.length + 2*n, size, TRUE))
goto fail;
}
dfield = gwy_data_field_new(header.xres, header.yres,
header.xscale, header.yscale,
FALSE);
data = gwy_data_field_get_data(dfield);
if (header.binary) {
const gint16 *d16 = (const gint16*)(buffer + header.length);
for (i = 0; i < n; i++)
data[i] = GINT16_FROM_LE(d16[i]);
}
else {
gchar *p = buffer + header.length;
for (i = 0; i < n; i++)
data[i] = strtol(p, &p, 10);
}
gwy_data_field_multiply(dfield, header.zscale/32768.0);
/* Units references released in free_header() */
gwy_data_field_set_si_unit_xy(dfield, header.xyunits);
gwy_data_field_set_si_unit_z(dfield, header.zunits);
container = gwy_container_new();
gwy_container_set_object(container, gwy_app_get_data_key_for_id(0), dfield);
g_object_unref(dfield);
gwy_app_channel_title_fall_back(container, 0);
gwy_file_channel_import_log_add(container, 0, NULL, filename);
fail:
free_header(&header);
g_free(buffer);
return container;
}
static void
free_header(BurleighExpHeader *header)
{
GWY_OBJECT_UNREF(header->xyunits);
GWY_OBJECT_UNREF(header->zunits);
}
static gboolean
parse_scale(gchar **p,
const gchar *name,
double *value,
GwySIUnit **units,
GError **error)
{
gint power10;
gchar *vp, *line;
line = gwy_str_next_line(p);
if (!line) {
err_MISSING_FIELD(error, name);
return FALSE;
}
vp = strchr(line, ':');
if (!vp) {
g_set_error(error, GWY_MODULE_FILE_ERROR, GWY_MODULE_FILE_ERROR_DATA,
_("Missing colon in header line."));
return FALSE;
}
*vp = '\0';
vp++;
gwy_debug("<%s> = <%s>", name, vp);
if (!gwy_strequal(line, name)) {
err_MISSING_FIELD(error, name);
return FALSE;
}
*value = g_ascii_strtod(vp, &vp);
*units = gwy_si_unit_new_parse(vp, &power10);
*value *= pow10(power10);
if (!*value) {
g_warning("%s is 0.0, fixing to 1.0", name);
*value = 1.0;
}
return TRUE;
}
static gboolean
parse_dim(gchar **p,
const gchar *name,
gint *value,
GError **error)
{
gchar *vp, *line;
line = gwy_str_next_line(p);
if (!line) {
err_MISSING_FIELD(error, name);
return FALSE;
}
vp = strchr(line, ':');
if (!vp) {
g_set_error(error, GWY_MODULE_FILE_ERROR, GWY_MODULE_FILE_ERROR_DATA,
_("Missing colon in header line."));
return FALSE;
}
*vp = '\0';
vp++;
gwy_debug("<%s> = <%s>", name, vp);
if (!gwy_strequal(line, name)) {
err_MISSING_FIELD(error, name);
return FALSE;
}
*value = strtol(vp, NULL, 10);
if (err_DIMENSION(error, *value))
return FALSE;
return TRUE;
}
static gboolean
burleigh_exp_read_header(BurleighExpHeader *header,
gchar *buf,
GError **error)
{
GwySIUnit *yunits = NULL, *dummy = NULL;
gchar *p, *line;
gwy_clear(header, 1);
p = buf;
/* Magic header */
if (!(line = gwy_str_next_line(&p))
|| strncmp(line, MAGIC, MAGIC_SIZE) != 0) {
err_FILE_TYPE(error, "Burleigh export");
return FALSE;
}
/* Skip all other lines starting with a dot */
while ((line = gwy_str_next_line(&p))) {
if (sscanf(line, ".Binary Format, Header Length=%u, Integer %u bits",
&header->length, &header->bpp))
header->binary = TRUE;
if (!p || p[0] != '.')
break;
}
if (!line) {
err_FILE_TYPE(error, "Burleigh export");
return FALSE;
}
if (!parse_scale(&p, "X Scale", &header->xscale, &header->xyunits, error))
return FALSE;
if (!parse_dim(&p, "X Pixel", &header->xres, error))
return FALSE;
if (!parse_scale(&p, "Y Scale", &header->yscale, &yunits, error))
return FALSE;
/* FIXME: Check sanity */
g_object_unref(yunits);
if (!parse_dim(&p, "Y Pixel", &header->yres, error))
return FALSE;
if (!parse_scale(&p, "Z Scale", &header->zscale, &header->zunits, error))
return FALSE;
if (!parse_scale(&p, "Z Res.(value/digital)", &header->zres, &dummy,
error))
return FALSE;
g_object_unref(dummy);
if (!header->binary)
header->length = p - buf;
return TRUE;
}
/* 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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