2 /* creates all the necessary data for drawing the dive profile
3 * uses cairo to draw it
15 int selected_dive = 0;
17 typedef enum { STABLE, SLOW, MODERATE, FAST, CRAZY } velocity_t;
18 /* Plot info with smoothing, velocity indication
19 * and one-, two- and three-minute minimums and maximums */
23 int meandepth, maxdepth;
27 unsigned int same_cylinder:1;
28 unsigned int cylinderindex;
30 /* pressure[0] is sensor pressure
31 * pressure[1] is interpolated pressure */
38 struct plot_data *min[3];
39 struct plot_data *max[3];
44 #define INTERPOLATED_PR 1
45 #define SENSOR_PRESSURE(_entry) (_entry)->pressure[SENSOR_PR]
46 #define INTERPOLATED_PRESSURE(_entry) (_entry)->pressure[INTERPOLATED_PR]
48 /* convert velocity to colors */
49 typedef struct { double r, g, b; } rgb_t;
50 static const rgb_t rgb[] = {
51 [STABLE] = {0.0, 0.4, 0.0},
52 [SLOW] = {0.4, 0.8, 0.0},
53 [MODERATE] = {0.8, 0.8, 0.0},
54 [FAST] = {0.8, 0.5, 0.0},
55 [CRAZY] = {1.0, 0.0, 0.0},
58 #define plot_info_size(nr) (sizeof(struct plot_info) + (nr)*sizeof(struct plot_data))
60 /* Scale to 0,0 -> maxx,maxy */
61 #define SCALEX(gc,x) (((x)-gc->leftx)/(gc->rightx-gc->leftx)*gc->maxx)
62 #define SCALEY(gc,y) (((y)-gc->topy)/(gc->bottomy-gc->topy)*gc->maxy)
63 #define SCALE(gc,x,y) SCALEX(gc,x),SCALEY(gc,y)
65 static void move_to(struct graphics_context *gc, double x, double y)
67 cairo_move_to(gc->cr, SCALE(gc, x, y));
70 static void line_to(struct graphics_context *gc, double x, double y)
72 cairo_line_to(gc->cr, SCALE(gc, x, y));
75 static void set_source_rgba(struct graphics_context *gc, double r, double g, double b, double a)
78 * For printers, we still honor 'a', but ignore colors
79 * for now. Black is white and white is black
88 cairo_set_source_rgba(gc->cr, r, g, b, a);
91 void set_source_rgb(struct graphics_context *gc, double r, double g, double b)
93 set_source_rgba(gc, r, g, b, 1);
96 #define ROUND_UP(x,y) ((((x)+(y)-1)/(y))*(y))
98 /* debugging tool - not normally used */
99 static void dump_pi (struct plot_info *pi)
103 printf("pi:{nr:%d maxtime:%d meandepth:%d maxdepth:%d \n"
104 " maxpressure:%d mintemp:%d maxtemp:%d\n",
105 pi->nr, pi->maxtime, pi->meandepth, pi->maxdepth,
106 pi->maxpressure, pi->mintemp, pi->maxtemp);
107 for (i = 0; i < pi->nr; i++)
108 printf(" entry[%d]:{same_cylinder:%d cylinderindex:%d sec:%d pressure:{%d,%d}\n"
109 " temperature:%d depth:%d smoothed:%d}\n",
110 i, pi->entry[i].same_cylinder, pi->entry[i].cylinderindex, pi->entry[i].sec,
111 pi->entry[i].pressure[0], pi->entry[i].pressure[1],
112 pi->entry[i].temperature, pi->entry[i].depth, pi->entry[i].smoothed);
117 * When showing dive profiles, we scale things to the
118 * current dive. However, we don't scale past less than
119 * 30 minutes or 90 ft, just so that small dives show
121 * we also need to add 180 seconds at the end so the min/max
124 static int get_maxtime(struct plot_info *pi)
126 int seconds = pi->maxtime;
127 /* min 30 minutes, rounded up to 5 minutes, with at least 2.5 minutes to spare */
128 return MAX(30*60, ROUND_UP(seconds+150, 60*5));
131 static int get_maxdepth(struct plot_info *pi)
133 unsigned mm = pi->maxdepth;
134 /* Minimum 30m, rounded up to 10m, with at least 3m to spare */
135 return MAX(30000, ROUND_UP(mm+3000, 10000));
142 } text_render_options_t;
145 #define CENTER (-0.5)
152 static void plot_text(struct graphics_context *gc, const text_render_options_t *tro,
153 double x, double y, const char *fmt, ...)
155 cairo_t *cr = gc->cr;
156 cairo_font_extents_t fe;
157 cairo_text_extents_t extents;
163 vsnprintf(buffer, sizeof(buffer), fmt, args);
166 cairo_set_font_size(cr, tro->size);
167 cairo_font_extents(cr, &fe);
168 cairo_text_extents(cr, buffer, &extents);
169 dx = tro->hpos * extents.width + extents.x_bearing;
170 dy = tro->vpos * extents.height + fe.descent;
173 cairo_rel_move_to(cr, dx, dy);
175 cairo_text_path(cr, buffer);
176 set_source_rgb(gc, 0, 0, 0);
180 cairo_rel_move_to(cr, dx, dy);
182 set_source_rgb(gc, tro->r, tro->g, tro->b);
183 cairo_show_text(cr, buffer);
190 static struct ev_select *ev_namelist;
191 static int evn_allocated;
194 void evn_foreach(void (*callback)(const char *, int *, void *), void *data)
198 for (i = 0; i < evn_used; i++) {
199 callback(ev_namelist[i].ev_name, &ev_namelist[i].plot_ev, data);
203 void remember_event(const char *eventname)
207 if (!eventname || (len = strlen(eventname)) == 0)
209 while (i < evn_used) {
210 if (!strncmp(eventname,ev_namelist[i].ev_name,len))
214 if (evn_used == evn_allocated) {
216 ev_namelist = realloc(ev_namelist, evn_allocated * sizeof(struct ev_select));
218 /* we are screwed, but let's just bail out */
221 ev_namelist[evn_used].ev_name = strdup(eventname);
222 ev_namelist[evn_used].plot_ev = TRUE;
226 static void plot_one_event(struct graphics_context *gc, struct plot_info *pi, struct event *event, const text_render_options_t *tro)
231 /* is plotting this event disabled? */
233 for (i = 0; i < evn_used; i++) {
234 if (! strcmp(event->name, ev_namelist[i].ev_name)) {
235 if (ev_namelist[i].plot_ev)
242 for (i = 0; i < pi->nr; i++) {
243 struct plot_data *data = pi->entry + i;
244 if (event->time.seconds < data->sec)
248 /* draw a little tirangular marker and attach tooltip */
249 x = SCALEX(gc, event->time.seconds);
250 y = SCALEY(gc, depth);
251 set_source_rgba(gc, 1.0, 1.0, 0.1, 0.8);
252 cairo_move_to(gc->cr, x-15, y+6);
253 cairo_line_to(gc->cr, x-3 , y+6);
254 cairo_line_to(gc->cr, x-9, y-6);
255 cairo_line_to(gc->cr, x-15, y+6);
256 cairo_stroke_preserve(gc->cr);
258 set_source_rgba(gc, 0.0, 0.0, 0.0, 0.8);
259 cairo_move_to(gc->cr, x-9, y-3);
260 cairo_line_to(gc->cr, x-9, y+1);
261 cairo_move_to(gc->cr, x-9, y+4);
262 cairo_line_to(gc->cr, x-9, y+4);
263 cairo_stroke(gc->cr);
264 attach_tooltip(x-15, y-6, 12, 12, event->name);
267 static void plot_events(struct graphics_context *gc, struct plot_info *pi, struct dive *dive)
269 static const text_render_options_t tro = {14, 1.0, 0.2, 0.2, CENTER, TOP};
270 struct event *event = dive->events;
276 plot_one_event(gc, pi, event, &tro);
281 static void render_depth_sample(struct graphics_context *gc, struct plot_data *entry, const text_render_options_t *tro)
283 int sec = entry->sec, decimals;
286 d = get_depth_units(entry->depth, &decimals, NULL);
288 plot_text(gc, tro, sec, entry->depth, "%.*f", decimals, d);
291 static void plot_text_samples(struct graphics_context *gc, struct plot_info *pi)
293 static const text_render_options_t deep = {14, 1.0, 0.2, 0.2, CENTER, TOP};
294 static const text_render_options_t shallow = {14, 1.0, 0.2, 0.2, CENTER, BOTTOM};
298 for (i = 0; i < pi->nr; i++) {
299 struct plot_data *entry = pi->entry + i;
301 if (entry->depth < 2000)
304 if ((entry == entry->max[2]) && entry->depth != last) {
305 render_depth_sample(gc, entry, &deep);
309 if ((entry == entry->min[2]) && entry->depth != last) {
310 render_depth_sample(gc, entry, &shallow);
314 if (entry->depth != last)
319 static void plot_depth_text(struct graphics_context *gc, struct plot_info *pi)
321 int maxtime, maxdepth;
323 /* Get plot scaling limits */
324 maxtime = get_maxtime(pi);
325 maxdepth = get_maxdepth(pi);
327 gc->leftx = 0; gc->rightx = maxtime;
328 gc->topy = 0; gc->bottomy = maxdepth;
330 plot_text_samples(gc, pi);
333 static void plot_smoothed_profile(struct graphics_context *gc, struct plot_info *pi)
336 struct plot_data *entry = pi->entry;
338 set_source_rgba(gc, 1, 0.2, 0.2, 0.20);
339 move_to(gc, entry->sec, entry->smoothed);
340 for (i = 1; i < pi->nr; i++) {
342 line_to(gc, entry->sec, entry->smoothed);
344 cairo_stroke(gc->cr);
347 static void plot_minmax_profile_minute(struct graphics_context *gc, struct plot_info *pi,
351 struct plot_data *entry = pi->entry;
353 set_source_rgba(gc, 1, 0.2, 1, a);
354 move_to(gc, entry->sec, entry->min[index]->depth);
355 for (i = 1; i < pi->nr; i++) {
357 line_to(gc, entry->sec, entry->min[index]->depth);
359 for (i = 1; i < pi->nr; i++) {
360 line_to(gc, entry->sec, entry->max[index]->depth);
363 cairo_close_path(gc->cr);
367 static void plot_minmax_profile(struct graphics_context *gc, struct plot_info *pi)
371 plot_minmax_profile_minute(gc, pi, 2, 0.1);
372 plot_minmax_profile_minute(gc, pi, 1, 0.1);
373 plot_minmax_profile_minute(gc, pi, 0, 0.1);
376 static void plot_depth_profile(struct graphics_context *gc, struct plot_info *pi)
379 cairo_t *cr = gc->cr;
381 struct plot_data *entry;
382 int maxtime, maxdepth, marker;
383 int increments[4] = { 5*60, 10*60, 15*60, 30*60 };
385 /* Get plot scaling limits */
386 maxtime = get_maxtime(pi);
387 maxdepth = get_maxdepth(pi);
389 /* Time markers: at most every 5 min, but no more than 12 markers
390 * and for convenience we do 5, 10, 15 or 30 min intervals.
391 * This allows for 6h dives - enough (I hope) for even the craziest
392 * divers - but just in case, for those 8h depth-record-breaking dives,
393 * we double the interval if this still doesn't get us to 12 or fewer
396 while (maxtime / increments[i] > 12 && i < 4)
398 incr = increments[i];
399 while (maxtime / incr > 12)
402 gc->leftx = 0; gc->rightx = maxtime;
403 gc->topy = 0; gc->bottomy = 1.0;
404 set_source_rgba(gc, 1, 1, 1, 0.5);
405 for (i = incr; i < maxtime; i += incr) {
411 /* now the text on every second time marker */
412 text_render_options_t tro = {10, 0.2, 1.0, 0.2, CENTER, TOP};
413 for (i = incr; i < maxtime; i += 2 * incr)
414 plot_text(gc, &tro, i, 1, "%d", i/60);
416 /* Depth markers: every 30 ft or 10 m*/
417 gc->leftx = 0; gc->rightx = 1.0;
418 gc->topy = 0; gc->bottomy = maxdepth;
419 switch (output_units.length) {
420 case METERS: marker = 10000; break;
421 case FEET: marker = 9144; break; /* 30 ft */
424 set_source_rgba(gc, 1, 1, 1, 0.5);
425 for (i = marker; i < maxdepth; i += marker) {
431 /* Show mean depth */
433 set_source_rgba(gc, 1, 0.2, 0.2, 0.40);
434 move_to(gc, 0, pi->meandepth);
435 line_to(gc, 1, pi->meandepth);
439 gc->leftx = 0; gc->rightx = maxtime;
442 * These are good for debugging text placement etc,
443 * but not for actual display..
446 plot_smoothed_profile(gc, pi);
447 plot_minmax_profile(gc, pi);
450 set_source_rgba(gc, 1, 0.2, 0.2, 0.80);
452 /* Do the depth profile for the neat fill */
453 gc->topy = 0; gc->bottomy = maxdepth;
454 set_source_rgba(gc, 1, 0.2, 0.2, 0.20);
458 for (i = 0; i < pi->nr; i++, entry++)
459 line_to(gc, entry->sec, entry->depth);
460 cairo_close_path(gc->cr);
462 set_source_rgba(gc, 1, 1, 1, 0.2);
463 cairo_fill_preserve(cr);
464 set_source_rgb(gc, 1, 1, 1);
470 /* Now do it again for the velocity colors */
472 for (i = 1; i < pi->nr; i++) {
475 /* we want to draw the segments in different colors
476 * representing the vertical velocity, so we need to
477 * chop this into short segments */
478 rgb_t color = rgb[entry->velocity];
479 depth = entry->depth;
480 set_source_rgb(gc, color.r, color.g, color.b);
481 move_to(gc, entry[-1].sec, entry[-1].depth);
482 line_to(gc, sec, depth);
487 static int setup_temperature_limits(struct graphics_context *gc, struct plot_info *pi)
489 int maxtime, mintemp, maxtemp, delta;
491 /* Get plot scaling limits */
492 maxtime = get_maxtime(pi);
493 mintemp = pi->mintemp;
494 maxtemp = pi->maxtemp;
496 gc->leftx = 0; gc->rightx = maxtime;
497 /* Show temperatures in roughly the lower third, but make sure the scale
498 is at least somewhat reasonable */
499 delta = maxtemp - mintemp;
500 if (delta > 3000) { /* more than 3K in fluctuation */
501 gc->topy = maxtemp + delta*2;
502 gc->bottomy = mintemp - delta/2;
504 gc->topy = maxtemp + 1500 + delta*2;
505 gc->bottomy = mintemp - delta/2;
508 return maxtemp > mintemp;
511 static void plot_single_temp_text(struct graphics_context *gc, int sec, int mkelvin)
515 static const text_render_options_t tro = {12, 0.6, 0.6, 1.0, LEFT, TOP};
517 deg = get_temp_units(mkelvin, &unit);
519 plot_text(gc, &tro, sec, mkelvin, "%d%s", (int)(deg + 0.5), unit);
522 static void plot_temperature_text(struct graphics_context *gc, struct plot_info *pi)
525 int last = -300, sec = 0;
526 int last_temperature = 0, last_printed_temp = 0;
528 if (!setup_temperature_limits(gc, pi))
531 for (i = 0; i < pi->nr; i++) {
532 struct plot_data *entry = pi->entry+i;
533 int mkelvin = entry->temperature;
537 last_temperature = mkelvin;
539 /* don't print a temperature
540 * if it's been less than 5min and less than a 2K change OR
541 * if it's been less than 2min OR if the change from the
542 * last print is less than .4K (and therefore less than 1F */
543 if (((sec < last + 300) && (abs(mkelvin - last_printed_temp) < 2000)) ||
544 (sec < last + 120) ||
545 (abs(mkelvin - last_printed_temp) < 400))
548 plot_single_temp_text(gc,sec,mkelvin);
549 last_printed_temp = mkelvin;
551 /* it would be nice to print the end temperature, if it's
552 * different or if the last temperature print has been more
553 * than a quarter of the dive back */
554 if ((abs(last_temperature - last_printed_temp) > 500) ||
555 ((double)last / (double)sec < 0.75))
556 plot_single_temp_text(gc, sec, last_temperature);
559 static void plot_temperature_profile(struct graphics_context *gc, struct plot_info *pi)
562 cairo_t *cr = gc->cr;
565 if (!setup_temperature_limits(gc, pi))
568 set_source_rgba(gc, 0.2, 0.2, 1.0, 0.8);
569 for (i = 0; i < pi->nr; i++) {
570 struct plot_data *entry = pi->entry + i;
571 int mkelvin = entry->temperature;
572 int sec = entry->sec;
579 line_to(gc, sec, mkelvin);
581 move_to(gc, sec, mkelvin);
587 /* gets both the actual start and end pressure as well as the scaling factors */
588 static int get_cylinder_pressure_range(struct graphics_context *gc, struct plot_info *pi)
591 gc->rightx = get_maxtime(pi);
593 gc->bottomy = 0; gc->topy = pi->maxpressure * 1.5;
594 return pi->maxpressure != 0;
597 static void plot_pressure_helper(struct graphics_context *gc, struct plot_info *pi, int type)
600 int lift_pen = FALSE;
602 for (i = 0; i < pi->nr; i++) {
604 struct plot_data *entry = pi->entry + i;
606 mbar = entry->pressure[type];
607 if (!entry->same_cylinder)
614 if (i > 0 && entry->same_cylinder) {
615 /* if we have a previous event from the same tank,
616 * draw at least a short line .
617 * This uses the implementation detail that the
618 * type is either 0 or 1 */
620 prev_pr = (entry-1)->pressure[type] ? : (entry-1)->pressure[1 - type];
621 move_to(gc, (entry-1)->sec, prev_pr);
622 line_to(gc, entry->sec, mbar);
624 move_to(gc, entry->sec, mbar);
628 line_to(gc, entry->sec, mbar);
630 cairo_stroke(gc->cr);
634 static void plot_cylinder_pressure(struct graphics_context *gc, struct plot_info *pi)
636 if (!get_cylinder_pressure_range(gc, pi))
639 /* first plot the pressure readings we have from the dive computer */
640 set_source_rgba(gc, 0.2, 1.0, 0.2, 0.80);
641 plot_pressure_helper(gc, pi, SENSOR_PR);
643 /* then, in a different color, the interpolated values */
644 set_source_rgba(gc, 1.0, 1.0, 0.2, 0.80);
645 plot_pressure_helper(gc, pi, INTERPOLATED_PR);
648 static void plot_pressure_value(struct graphics_context *gc, int mbar, int sec,
649 int xalign, int yalign)
654 pressure = get_pressure_units(mbar, &unit);
655 text_render_options_t tro = {10, 0.2, 1.0, 0.2, xalign, yalign};
656 plot_text(gc, &tro, sec, mbar, "%d %s", pressure, unit);
659 #define GET_PRESSURE(_entry) (SENSOR_PRESSURE(_entry) ? : INTERPOLATED_PRESSURE(_entry))
661 static void plot_cylinder_pressure_text(struct graphics_context *gc, struct plot_info *pi)
665 int seen_cyl[MAX_CYLINDERS] = { FALSE, };
666 int last_pressure[MAX_CYLINDERS] = { 0, };
667 int last_time[MAX_CYLINDERS] = { 0, };
668 struct plot_data *entry;
670 if (!get_cylinder_pressure_range(gc, pi))
673 /* only loop over the actual events from the dive computer
674 * plus the second synthetic event at the start (to make sure
675 * we get "time=0" right)
676 * sadly with a recent change that first entry may no longer
677 * have any pressure reading - in that case just grab the
678 * pressure from the second entry */
679 if (GET_PRESSURE(pi->entry + 1) == 0 && GET_PRESSURE(pi->entry + 2) !=0)
680 INTERPOLATED_PRESSURE(pi->entry + 1) = GET_PRESSURE(pi->entry + 2);
681 for (i = 1; i < pi->nr; i++) {
682 entry = pi->entry + i;
684 if (!entry->same_cylinder) {
685 cyl = entry->cylinderindex;
686 if (!seen_cyl[cyl]) {
687 mbar = GET_PRESSURE(entry);
688 plot_pressure_value(gc, mbar, entry->sec, LEFT, BOTTOM);
689 seen_cyl[cyl] = TRUE;
692 /* remember the last pressure and time of
693 * the previous cylinder */
694 cyl = (entry - 1)->cylinderindex;
695 last_pressure[cyl] = GET_PRESSURE(entry - 1);
696 last_time[cyl] = (entry - 1)->sec;
700 cyl = entry->cylinderindex;
701 last_pressure[cyl] = GET_PRESSURE(entry);
702 last_time[cyl] = entry->sec;
704 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) {
705 if (last_time[cyl]) {
706 plot_pressure_value(gc, last_pressure[cyl], last_time[cyl], CENTER, TOP);
711 static void analyze_plot_info_minmax_minute(struct plot_data *entry, struct plot_data *first, struct plot_data *last, int index)
713 struct plot_data *p = entry;
714 int time = entry->sec;
715 int seconds = 90*(index+1);
716 struct plot_data *min, *max;
719 /* Go back 'seconds' in time */
721 if (p[-1].sec < time - seconds)
726 /* Then go forward until we hit an entry past the time */
731 int depth = p->depth;
732 if (p->sec > time + seconds)
736 if (depth < min->depth)
738 if (depth > max->depth)
741 entry->min[index] = min;
742 entry->max[index] = max;
743 entry->avg[index] = (avg + nr/2) / nr;
746 static void analyze_plot_info_minmax(struct plot_data *entry, struct plot_data *first, struct plot_data *last)
748 analyze_plot_info_minmax_minute(entry, first, last, 0);
749 analyze_plot_info_minmax_minute(entry, first, last, 1);
750 analyze_plot_info_minmax_minute(entry, first, last, 2);
753 static velocity_t velocity(int speed)
757 if (speed < -304) /* ascent faster than -60ft/min */
759 else if (speed < -152) /* above -30ft/min */
761 else if (speed < -76) /* -15ft/min */
763 else if (speed < -25) /* -5ft/min */
765 else if (speed < 25) /* very hard to find data, but it appears that the recommendations
766 for descent are usually about 2x ascent rate; still, we want
767 stable to mean stable */
769 else if (speed < 152) /* between 5 and 30ft/min is considered slow */
771 else if (speed < 304) /* up to 60ft/min is moderate */
773 else if (speed < 507) /* up to 100ft/min is fast */
775 else /* more than that is just crazy - you'll blow your ears out */
780 static struct plot_info *analyze_plot_info(struct plot_info *pi)
785 /* Do pressure min/max based on the non-surface data */
786 for (i = 0; i < nr; i++) {
787 struct plot_data *entry = pi->entry+i;
788 int pressure = GET_PRESSURE(entry);
789 int temperature = entry->temperature;
792 if (pressure > pi->maxpressure)
793 pi->maxpressure = pressure;
797 if (!pi->mintemp || temperature < pi->mintemp)
798 pi->mintemp = temperature;
799 if (temperature > pi->maxtemp)
800 pi->maxtemp = temperature;
804 /* Smoothing function: 5-point triangular smooth */
805 for (i = 2; i < nr; i++) {
806 struct plot_data *entry = pi->entry+i;
810 depth = entry[-2].depth + 2*entry[-1].depth + 3*entry[0].depth + 2*entry[1].depth + entry[2].depth;
811 entry->smoothed = (depth+4) / 9;
813 /* vertical velocity in mm/sec */
814 /* Linus wants to smooth this - let's at least look at the samples that aren't FAST or CRAZY */
815 if (entry[0].sec - entry[-1].sec) {
816 entry->velocity = velocity((entry[0].depth - entry[-1].depth) / (entry[0].sec - entry[-1].sec));
817 /* if our samples are short and we aren't too FAST*/
818 if (entry[0].sec - entry[-1].sec < 15 && entry->velocity < FAST) {
820 while (i+past > 0 && entry[0].sec - entry[past].sec < 15)
822 entry->velocity = velocity((entry[0].depth - entry[past].depth) /
823 (entry[0].sec - entry[past].sec));
826 entry->velocity = STABLE;
829 /* One-, two- and three-minute minmax data */
830 for (i = 0; i < nr; i++) {
831 struct plot_data *entry = pi->entry +i;
832 analyze_plot_info_minmax(entry, pi->entry, pi->entry+nr);
839 * simple structure to track the beginning and end tank pressure as
840 * well as the integral of depth over time spent while we have no
841 * pressure reading from the tank */
842 typedef struct pr_track_struct pr_track_t;
843 struct pr_track_struct {
848 double pressure_time;
852 static pr_track_t *pr_track_alloc(int start, int t_start) {
853 pr_track_t *pt = malloc(sizeof(pr_track_t));
855 pt->t_start = t_start;
858 pt->pressure_time = 0.0;
863 /* poor man's linked list */
864 static pr_track_t *list_last(pr_track_t *list)
866 pr_track_t *tail = list;
875 static pr_track_t *list_add(pr_track_t *list, pr_track_t *element)
877 pr_track_t *tail = list_last(list);
880 tail->next = element;
884 static void list_free(pr_track_t *list)
888 list_free(list->next);
892 static void fill_missing_tank_pressures(struct dive *dive, struct plot_info *pi,
893 pr_track_t **track_pr)
895 pr_track_t *list = NULL;
896 pr_track_t *nlist = NULL;
899 struct plot_data *entry;
900 int cur_pr[MAX_CYLINDERS];
902 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) {
903 cur_pr[cyl] = track_pr[cyl]->start;
906 /* The first two are "fillers", but in case we don't have a sample
907 * at time 0 we need to process the second of them here */
908 for (i = 1; i < pi->nr; i++) {
909 entry = pi->entry + i;
910 if (SENSOR_PRESSURE(entry)) {
911 cur_pr[entry->cylinderindex] = SENSOR_PRESSURE(entry);
913 if(!list || list->t_end < entry->sec) {
914 nlist = track_pr[entry->cylinderindex];
916 while (nlist && nlist->t_start <= entry->sec) {
920 /* there may be multiple segments - so
921 * let's assemble the length */
923 pt = list->pressure_time;
924 while (!nlist->end) {
927 /* oops - we have no end pressure,
928 * so this means this is a tank without
929 * gas consumption information */
932 pt += nlist->pressure_time;
935 /* just continue without calculating
936 * interpolated values */
940 magic = (nlist->end - cur_pr[entry->cylinderindex]) / pt; }
942 double cur_pt = (entry->sec - (entry-1)->sec) *
943 (1 + entry->depth / 10000.0);
944 INTERPOLATED_PRESSURE(entry) =
945 cur_pr[entry->cylinderindex] + cur_pt * magic;
946 cur_pr[entry->cylinderindex] = INTERPOLATED_PRESSURE(entry);
948 INTERPOLATED_PRESSURE(entry) = cur_pr[entry->cylinderindex];
953 static int get_cylinder_index(struct dive *dive, struct event *ev)
958 * Try to find a cylinder that matches the O2 percentage
959 * in the gas change event 'value' field.
961 * Crazy suunto gas change events. We really should do
962 * this in libdivecomputer or something.
964 for (i = 0; i < MAX_CYLINDERS; i++) {
965 cylinder_t *cyl = dive->cylinder+i;
966 int o2 = (cyl->gasmix.o2.permille + 5) / 10;
974 static struct event *get_next_gaschange(struct event *event)
977 if (!strcmp(event->name, "gaschange"))
984 static int set_cylinder_index(struct plot_info *pi, int i, int cylinderindex, unsigned int end)
987 struct plot_data *entry = pi->entry+i;
988 if (entry->sec > end)
990 if (entry->cylinderindex != cylinderindex) {
991 entry->cylinderindex = cylinderindex;
992 entry->pressure[0] = 0;
999 static void check_gas_change_events(struct dive *dive, struct plot_info *pi)
1001 int i = 0, cylinderindex = 0;
1002 struct event *ev = get_next_gaschange(dive->events);
1008 i = set_cylinder_index(pi, i, cylinderindex, ev->time.seconds);
1009 cylinderindex = get_cylinder_index(dive, ev);
1010 ev = get_next_gaschange(ev->next);
1012 set_cylinder_index(pi, i, cylinderindex, ~0u);
1015 /* for computers that track gas changes through events */
1016 static int count_gas_change_events(struct dive *dive)
1019 struct event *ev = get_next_gaschange(dive->events);
1023 ev = get_next_gaschange(ev->next);
1029 * Create a plot-info with smoothing and ranged min/max
1031 * This also makes sure that we have extra empty events on both
1032 * sides, so that you can do end-points without having to worry
1035 static struct plot_info *create_plot_info(struct dive *dive, int nr_samples, struct sample *dive_sample)
1037 int cylinderindex = -1;
1038 int lastdepth, lastindex;
1039 int i, pi_idx, nr, sec, cyl;
1041 struct plot_info *pi;
1042 pr_track_t *track_pr[MAX_CYLINDERS] = {NULL, };
1043 pr_track_t *pr_track, *current;
1044 gboolean missing_pr = FALSE;
1045 struct plot_data *entry = NULL;
1048 /* we want to potentially add synthetic plot_info elements for the gas changes */
1049 nr = nr_samples + 4 + 2 * count_gas_change_events(dive);
1050 alloc_size = plot_info_size(nr);
1051 pi = malloc(alloc_size);
1054 memset(pi, 0, alloc_size);
1056 pi_idx = 2; /* the two extra events at the start */
1057 /* check for gas changes before the samples start */
1058 ev = get_next_gaschange(dive->events);
1059 while (ev && ev->time.seconds < dive_sample->time.seconds) {
1060 entry = pi->entry + pi_idx;
1061 entry->sec = ev->time.seconds;
1062 entry->depth = 0; /* is that always correct ? */
1064 ev = get_next_gaschange(ev->next);
1066 if (ev && ev->time.seconds == dive_sample->time.seconds) {
1067 /* we already have a sample at the time of the event */
1068 ev = get_next_gaschange(ev->next);
1073 for (i = 0; i < nr_samples; i++) {
1076 struct sample *sample = dive_sample+i;
1078 entry = pi->entry + i + pi_idx;
1079 while (ev && ev->time.seconds < sample->time.seconds) {
1080 /* insert two fake plot info structures for the end of
1081 * the old tank and the start of the new tank */
1082 entry->sec = ev->time.seconds;
1083 (entry+1)->sec = ev->time.seconds + 1;
1084 /* we need a fake depth - let's interpolate */
1086 entry->depth = sample->depth.mm -
1087 (sample->depth.mm - (sample-1)->depth.mm) / 2;
1089 entry->depth = sample->depth.mm;
1090 (entry+1)->depth = entry->depth;
1092 entry = pi->entry + i + pi_idx;
1093 ev = get_next_gaschange(ev->next);
1095 if (ev && ev->time.seconds == sample->time.seconds) {
1096 /* we already have a sample at the time of the event
1097 * just add a new one for the old tank and delay the
1098 * real even by one second (to keep time monotonous) */
1099 entry->sec = ev->time.seconds;
1100 entry->depth = sample->depth.mm;
1102 entry = pi->entry + i + pi_idx;
1103 ev = get_next_gaschange(ev->next);
1106 sec = entry->sec = sample->time.seconds + delay;
1107 depth = entry->depth = sample->depth.mm;
1108 entry->cylinderindex = sample->cylinderindex;
1109 SENSOR_PRESSURE(entry) = sample->cylinderpressure.mbar;
1110 entry->temperature = sample->temperature.mkelvin;
1112 if (depth || lastdepth)
1113 lastindex = i + pi_idx;
1116 if (depth > pi->maxdepth)
1117 pi->maxdepth = depth;
1119 entry = pi->entry + i + pi_idx;
1120 /* are there still unprocessed gas changes? that would be very strange */
1122 entry->sec = ev->time.seconds;
1123 entry->depth = 0; /* why are there gas changes after the dive is over? */
1125 entry = pi->entry + i + pi_idx;
1126 ev = get_next_gaschange(ev->next);
1128 nr = nr_samples + pi_idx - 2;
1129 check_gas_change_events(dive, pi);
1131 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) /* initialize the start pressures */
1132 track_pr[cyl] = pr_track_alloc(dive->cylinder[cyl].start.mbar, -1);
1133 current = track_pr[pi->entry[2].cylinderindex];
1134 for (i = 0; i < nr + 1; i++) {
1135 entry = pi->entry + i + 1;
1137 entry->same_cylinder = entry->cylinderindex == cylinderindex;
1138 cylinderindex = entry->cylinderindex;
1140 /* track the segments per cylinder and their pressure/time integral */
1141 if (!entry->same_cylinder) {
1142 current->end = SENSOR_PRESSURE(entry-1);
1143 current->t_end = (entry-1)->sec;
1144 current = pr_track_alloc(SENSOR_PRESSURE(entry), entry->sec);
1145 track_pr[cylinderindex] = list_add(track_pr[cylinderindex], current);
1146 } else { /* same cylinder */
1147 if ((!SENSOR_PRESSURE(entry) && SENSOR_PRESSURE(entry-1)) ||
1148 (SENSOR_PRESSURE(entry) && !SENSOR_PRESSURE(entry-1))) {
1149 /* transmitter changed its working status */
1150 current->end = SENSOR_PRESSURE(entry-1);
1151 current->t_end = (entry-1)->sec;
1152 current = pr_track_alloc(SENSOR_PRESSURE(entry), entry->sec);
1153 track_pr[cylinderindex] =
1154 list_add(track_pr[cylinderindex], current);
1157 /* finally, do the discrete integration to get the SAC rate equivalent */
1158 current->pressure_time += (entry->sec - (entry-1)->sec) *
1159 (1 + entry->depth / 10000.0);
1160 missing_pr |= !SENSOR_PRESSURE(entry);
1164 current->t_end = entry->sec;
1166 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) { /* initialize the end pressures */
1167 int pr = dive->cylinder[cyl].end.mbar;
1168 if (pr && track_pr[cyl]) {
1169 pr_track = list_last(track_pr[cyl]);
1173 /* Fill in the last two entries with empty values but valid times
1174 * without creating a false cylinder change event */
1176 pi->entry[i].sec = sec + 20;
1177 pi->entry[i].same_cylinder = 1;
1178 pi->entry[i].cylinderindex = pi->entry[i-1].cylinderindex;
1179 INTERPOLATED_PRESSURE(pi->entry + i) = GET_PRESSURE(pi->entry + i - 1);
1180 pi->entry[i+1].sec = sec + 40;
1181 pi->entry[i+1].same_cylinder = 1;
1182 pi->entry[i+1].cylinderindex = pi->entry[i-1].cylinderindex;
1183 INTERPOLATED_PRESSURE(pi->entry + i + 1) = GET_PRESSURE(pi->entry + i - 1);
1184 /* the number of actual entries - some computers have lots of
1185 * depth 0 samples at the end of a dive, we want to make sure
1186 * we have exactly one of them at the end */
1187 pi->nr = lastindex+1;
1188 while (pi->nr <= i+2 && pi->entry[pi->nr-1].depth > 0)
1190 pi->maxtime = pi->entry[lastindex].sec;
1192 /* Analyze_plot_info() will do the sample max pressures,
1193 * this handles the manual pressures
1195 pi->maxpressure = 0;
1196 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) {
1197 unsigned int mbar = dive->cylinder[cyl].start.mbar;
1198 if (mbar > pi->maxpressure)
1199 pi->maxpressure = mbar;
1202 pi->meandepth = dive->meandepth.mm;
1205 fill_missing_tank_pressures(dive, pi, track_pr);
1207 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++)
1208 list_free(track_pr[cyl]);
1209 if (0) /* awesome for debugging - not useful otherwise */
1211 return analyze_plot_info(pi);
1214 void plot(struct graphics_context *gc, cairo_rectangle_int_t *drawing_area, struct dive *dive)
1216 struct plot_info *pi;
1217 static struct sample fake[4];
1218 struct sample *sample = dive->sample;
1219 int nr = dive->samples;
1222 int duration = dive->duration.seconds;
1223 int maxdepth = dive->maxdepth.mm;
1225 fake[1].time.seconds = duration * 0.05;
1226 fake[1].depth.mm = maxdepth;
1227 fake[2].time.seconds = duration * 0.95;
1228 fake[2].depth.mm = maxdepth;
1229 fake[3].time.seconds = duration * 1.00;
1233 pi = create_plot_info(dive, nr, sample);
1235 cairo_translate(gc->cr, drawing_area->x, drawing_area->y);
1236 cairo_set_line_width(gc->cr, 2);
1237 cairo_set_line_cap(gc->cr, CAIRO_LINE_CAP_ROUND);
1238 cairo_set_line_join(gc->cr, CAIRO_LINE_JOIN_ROUND);
1241 * We can use "cairo_translate()" because that doesn't
1242 * scale line width etc. But the actual scaling we need
1243 * do set up ourselves..
1245 * Snif. What a pity.
1247 gc->maxx = (drawing_area->width - 2*drawing_area->x);
1248 gc->maxy = (drawing_area->height - 2*drawing_area->y);
1250 /* Temperature profile */
1251 plot_temperature_profile(gc, pi);
1253 /* Cylinder pressure plot */
1254 plot_cylinder_pressure(gc, pi);
1257 plot_depth_profile(gc, pi);
1258 plot_events(gc, pi, dive);
1260 /* Text on top of all graphs.. */
1261 plot_temperature_text(gc, pi);
1262 plot_depth_text(gc, pi);
1263 plot_cylinder_pressure_text(gc, pi);
1265 /* Bounding box last */
1266 gc->leftx = 0; gc->rightx = 1.0;
1267 gc->topy = 0; gc->bottomy = 1.0;
1269 set_source_rgb(gc, 1, 1, 1);
1274 cairo_close_path(gc->cr);
1275 cairo_stroke(gc->cr);