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/*
* qdrp.c
*
* Handle QDRP-style control files
*
* (c) 2007 Thomas White <taw27@cam.ac.uk>
* dtr - Diffraction Tomography Reconstruction
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#define _GNU_SOURCE
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "readpng.h"
#include "control.h"
#include "reflections.h"
static void qdrp_chomp(char *str) {
size_t i;
for ( i=0; i<strlen(str); i++ ) {
if ( str[i] == '\r' ) {
str[i] = '\0';
return;
}
if ( str[i] == '\n' ) {
str[i] = '\0';
return;
}
}
}
#define skip_whitespace \
while ( (( line[pos] == ' ' ) || ( line[pos] == '\t' )) && ( pos < strlen(line) ) ) { \
pos++; \
}
#define skip_chars \
while ( ( line[pos] != ' ' ) && ( line[pos] != '\t' ) && ( pos < strlen(line) ) ) { \
pos++; \
}
static int qdrp_parsefileline(ControlContext *ctx, const char *line) {
size_t pos = 0;
size_t mark = 0;
char *tilt_s;
char *file;
double tilt;
skip_whitespace;
mark = pos;
skip_chars;
tilt_s = strndup(line+mark, pos-mark);
skip_whitespace;
mark = pos;
skip_chars;
file = strndup(line+mark, pos-mark);
tilt = strtod(tilt_s, NULL);
free(tilt_s);
printf("QD: Reading file: Tilt = %f deg, File='%s'\n", tilt, file);
if ( readpng_read(file, tilt, ctx) ) {
printf("Reconstruction failed.\n");
return 1;
}
return 0;
}
static int qdrp_parseline(ControlContext *ctx, const char *line) {
if ( ctx->started ) {
return qdrp_parsefileline(ctx, line);
}
if ( ( line[0] == '-' ) && ( line[1] == '-') ) {
if ( !ctx->camera_length_set ) {
printf("QD: Parameter 'camera-length' not specified!\n");
return 1;
}
if ( !ctx->lambda_set ) {
printf("QD: Parameter 'lambda' not specified!\n");
return 1;
}
if ( !ctx->resolution_set ) {
printf("QD: Parameter 'resolution' not specified!\n");
return 1;
}
if ( !ctx->omega_set ) {
printf("QD: Parameter 'omega' not specified, and not using tilt-axis-search.\n");
return 1;
}
ctx->started = 1;
ctx->reflectionlist = reflection_init();
}
if ( !ctx->started ) {
size_t pos = 0;
size_t mark = 0;
skip_whitespace;
if ( strncasecmp(line+pos, "resolution", 10) == 0 ) {
char *resolution_s;
skip_chars;
skip_whitespace;
mark = pos;
skip_chars;
resolution_s = strndup(line+mark, pos-mark);
ctx->resolution = strtod(resolution_s, NULL);
free(resolution_s);
ctx->resolution_set = 1;
printf("QD: resolution = %f pixels/m\n", ctx->resolution);
}
if ( strncasecmp(line+pos, "lambda", 6) == 0 ) {
char *lambda_s;
skip_chars;
skip_whitespace;
mark = pos;
skip_chars;
lambda_s = strndup(line+mark, pos-mark);
ctx->lambda = strtod(lambda_s, NULL);
free(lambda_s);
ctx->lambda_set = 1;
printf("QD: lambda = %e m\n", ctx->lambda);
}
if ( strncasecmp(line+pos, "camera-length", 13) == 0 ) {
char *camera_length_s;
skip_chars;
skip_whitespace;
mark = pos;
skip_chars;
camera_length_s = strndup(line+mark, pos-mark);
ctx->camera_length = strtod(camera_length_s, NULL);
free(camera_length_s);
ctx->camera_length_set = 1;
printf("QD: camera-length = %f m\n", ctx->camera_length);
}
if ( strncasecmp(line+pos, "omega", 5) == 0 ) {
char *omega_s;
skip_chars;
skip_whitespace;
mark = pos;
skip_chars;
omega_s = strndup(line+mark, pos-mark);
ctx->omega = strtod(omega_s, NULL);
free(omega_s);
ctx->omega_set = 1;
printf("QD: omega = %f deg\n", ctx->omega);
}
if ( strncasecmp(line+pos, "centre", 6) == 0 ) {
float xc, yc;
if ( sscanf(line+pos, "centre %f %f", &xc, &yc) != 2 ) {
fprintf(stderr, "Couldn't parse 'centre' line\n");
return 1;
}
ctx->x_centre = xc;
ctx->y_centre = yc;
ctx->have_centres = 1;
printf("QD: centre %.2f, %.2f px\n", ctx->x_centre, ctx->y_centre);
}
}
return 0;
}
int qdrp_read(ControlContext *ctx) {
char *line;
line = malloc(256);
ctx->camera_length_set = 0;
ctx->omega_set = 0;
ctx->resolution_set = 0;
ctx->lambda_set = 0;
ctx->started = 0;
FILE *fh;
fh = fopen(ctx->filename, "r");
if ( !fh ) {
printf("QD: Couldn't open control file '%s'\n", ctx->filename);
return -1;
}
while ( !feof(fh) ) {
fgets(line, 256, fh);
if ( !feof(fh) ) {
qdrp_chomp(line);
if ( strlen(line) == 0 ) continue;
if ( line[0] != '#' ) {
if ( qdrp_parseline(ctx, line) ) {
fclose(fh);
free(line);
return -1;
}
}
}
}
fclose(fh);
free(line);
return 0; /* Success */
}
unsigned int qdrp_is_qdrprc(const char *filename) {
if ( strstr(filename, "qdrp") ) {
return 1;
}
return 0;
}
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