elene@5: #include <ctype.h>
elene@5: #include <errno.h>
elene@4: #include <stdio.h>
elene@5: #include <string.h>
elene@5: 
elene@5: #include <string>
elene@5: #include <vector>
elene@4: 
elene@3: #include "volume.h"
elene@4: 
elene@5: static char *strip_whitespaces(char *buf);
elene@5: 
elene@4: Volume::Volume()
elene@4: {
elene@4: 	width = height = 0;
elene@5: 	zaspect = 1;
elene@4: }
elene@4: 
elene@4: bool Volume::load_volume(const char *fname)
elene@4: {
elene@5: 	FILE *fp = fopen(fname, "r");
elene@5: 	if(!fp) {
elene@5: 		fprintf(stderr, "Failed to open file: %s: %s\n", fname, strerror(errno));
elene@5: 		return false;
elene@5: 	}
elene@5: 
elene@5: 	char buf[512];
elene@5: 	if(!fgets(buf, sizeof buf, fp)) {
elene@5: 		fprintf(stderr, "Empty file: %s.\n", fname);
elene@5: 		return false;
elene@5: 	}
elene@5: 	if(strstr(buf, "VOLUME") != buf) {
elene@5: 		fprintf(stderr, "Invalid volume file format: %s\n", fname);
elene@5: 		return false;
elene@5: 	}
elene@5: 
elene@5: 	bool reading_slices = false;
elene@5: 	std::vector<std::string> img_fnames;
elene@5: 
elene@5: 	while(fgets(buf, sizeof buf, fp)) {
elene@5: 		char *line = strip_whitespaces(buf);
elene@5: 		if(!line || *line == 0 || *line == '#')
elene@5: 			continue;
elene@5: 
elene@5: 		if(reading_slices == false) {
elene@5: 			if(strcmp(line, "SLICES") == 0)
elene@5: 				reading_slices = true;
elene@5: 
elene@5: 			sscanf(line, "zaspect = %f", &zaspect);
elene@5: 		}
elene@5: 		else {
elene@5: 			img_fnames.push_back(line);
elene@5: 		}
elene@5: 	}
elene@5: 
elene@5: 	fclose(fp);
elene@5: 
elene@5: 	for(size_t i=0; i<img_fnames.size(); i++) {
elene@5: 		Image img;
elene@5: 		if(img.load(img_fnames[i].c_str())) {
elene@5: 			push_slice(std::move(img));
elene@5: 		}
elene@5: 		else {
elene@5: 			fprintf(stderr, "Failed to load slice: %s\n", img_fnames[i].c_str());
elene@5: 		}
elene@5: 	}
elene@5: 
elene@4: 	return true;
elene@4: }
elene@4: 
elene@4: bool Volume::push_slice(Image &&slice)
elene@4: {
elene@4: 	if(slices.empty()) {
elene@4: 		width = slice.get_width();
elene@4: 		height = slice.get_height();
elene@4: 	}
elene@4: 	else {
elene@4: 		if(width != slice.get_width() || height != slice.get_height()) {
elene@4: 			fprintf(stderr, "failed to load slice no: %d\n", (int)slices.size() + 1);
elene@4: 			return false;
elene@4: 		}
elene@4: 	}
elene@4: 
elene@4: 	slices.push_back(slice);
elene@4: 	return true;
elene@4: }
elene@5: 
elene@5: void Volume::draw()
elene@5: {
elene@5: }
elene@5: 
elene@5: static char *strip_whitespaces(char *buf)
elene@5: {
elene@5: 	while(*buf && isspace(*buf))
elene@5: 		buf++;
elene@5: 
elene@5: 	if(!*buf)
elene@5: 		return 0;
elene@5: 
elene@5: 	char *end = buf + strlen(buf) - 1;
elene@5: 	while(end > buf && isspace(*end))
elene@5: 		end--;
elene@5: 	end[1] = 0;
elene@5: 	return buf;
elene@5: }