2 /* creates all the necessary data for drawing the dive profile
3 * uses cairo to draw it
16 int selected_dive = 0;
18 typedef enum { STABLE, SLOW, MODERATE, FAST, CRAZY } velocity_t;
20 /* Plot info with smoothing, velocity indication
21 * and one-, two- and three-minute minimums and maximums */
25 int meandepth, maxdepth;
29 unsigned int same_cylinder:1;
30 unsigned int cylinderindex;
32 /* pressure[0] is sensor pressure
33 * pressure[1] is interpolated pressure */
40 struct plot_data *min[3];
41 struct plot_data *max[3];
47 #define INTERPOLATED_PR 1
48 #define SENSOR_PRESSURE(_entry) (_entry)->pressure[SENSOR_PR]
49 #define INTERPOLATED_PRESSURE(_entry) (_entry)->pressure[INTERPOLATED_PR]
50 #define GET_PRESSURE(_entry) (SENSOR_PRESSURE(_entry) ? : INTERPOLATED_PRESSURE(_entry))
52 #define SAC_COLORS_START_IDX SAC_1
54 #define VELOCITY_COLORS_START_IDX VELO_STABLE
55 #define VELOCITY_COLORS 5
58 /* SAC colors. Order is important, the SAC_COLORS_START_IDX define above. */
59 SAC_1, SAC_2, SAC_3, SAC_4, SAC_5, SAC_6, SAC_7, SAC_8, SAC_9,
61 /* Velocity colors. Order is still important, ref VELOCITY_COLORS_START_IDX. */
62 VELO_STABLE, VELO_SLOW, VELO_MODERATE, VELO_FAST, VELO_CRAZY,
65 TEXT_BACKGROUND, ALERT_BG, ALERT_FG, EVENTS, SAMPLE_DEEP, SAMPLE_SHALLOW,
66 SMOOTHED, MINUTE, TIME_GRID, TIME_TEXT, DEPTH_GRID, MEAN_DEPTH, DEPTH_TOP,
67 DEPTH_BOTTOM, TEMP_TEXT, TEMP_PLOT, SAC_DEFAULT, BOUNDING_BOX, PRESSURE_TEXT, BACKGROUND
71 /* media[0] is screen, and media[1] is printer */
77 /* [color indice] = {{screen color, printer color}} */
78 static const color_t profile_color[] = {
79 [SAC_1] = {{FUNGREEN1, BLACK1_LOW_TRANS}},
80 [SAC_2] = {{APPLE1, BLACK1_LOW_TRANS}},
81 [SAC_3] = {{ATLANTIS1, BLACK1_LOW_TRANS}},
82 [SAC_4] = {{ATLANTIS2, BLACK1_LOW_TRANS}},
83 [SAC_5] = {{EARLSGREEN1, BLACK1_LOW_TRANS}},
84 [SAC_6] = {{HOKEYPOKEY1, BLACK1_LOW_TRANS}},
85 [SAC_7] = {{TUSCANY1, BLACK1_LOW_TRANS}},
86 [SAC_8] = {{CINNABAR1, BLACK1_LOW_TRANS}},
87 [SAC_9] = {{REDORANGE1, BLACK1_LOW_TRANS}},
89 [VELO_STABLE] = {{CAMARONE1, BLACK1_LOW_TRANS}},
90 [VELO_SLOW] = {{LIMENADE1, BLACK1_LOW_TRANS}},
91 [VELO_MODERATE] = {{RIOGRANDE1, BLACK1_LOW_TRANS}},
92 [VELO_FAST] = {{PIRATEGOLD1, BLACK1_LOW_TRANS}},
93 [VELO_CRAZY] = {{RED1, BLACK1_LOW_TRANS}},
95 [TEXT_BACKGROUND] = {{CONCRETE1_LOWER_TRANS, WHITE1}},
96 [ALERT_BG] = {{BROOM1_LOWER_TRANS, BLACK1_LOW_TRANS}},
97 [ALERT_FG] = {{BLACK1_LOW_TRANS, BLACK1_LOW_TRANS}},
98 [EVENTS] = {{REDORANGE1, BLACK1_LOW_TRANS}},
99 [SAMPLE_DEEP] = {{PERSIANRED1, BLACK1_LOW_TRANS}},
100 [SAMPLE_SHALLOW] = {{PERSIANRED1, BLACK1_LOW_TRANS}},
101 [SMOOTHED] = {{REDORANGE1_HIGH_TRANS, BLACK1_LOW_TRANS}},
102 [MINUTE] = {{MEDIUMREDVIOLET1_HIGHER_TRANS, BLACK1_LOW_TRANS}},
103 [TIME_GRID] = {{WHITE1, TUNDORA1_MED_TRANS}},
104 [TIME_TEXT] = {{FORESTGREEN1, BLACK1_LOW_TRANS}},
105 [DEPTH_GRID] = {{WHITE1, TUNDORA1_MED_TRANS}},
106 [MEAN_DEPTH] = {{REDORANGE1_MED_TRANS, BLACK1_LOW_TRANS}},
107 [DEPTH_BOTTOM] = {{GOVERNORBAY1_MED_TRANS, TUNDORA1_MED_TRANS}},
108 [DEPTH_TOP] = {{MERCURY1_MED_TRANS, WHITE1_MED_TRANS}},
109 [TEMP_TEXT] = {{GOVERNORBAY2, BLACK1_LOW_TRANS}},
110 [TEMP_PLOT] = {{ROYALBLUE2_LOW_TRANS, BLACK1_LOW_TRANS}},
111 [SAC_DEFAULT] = {{WHITE1, BLACK1_LOW_TRANS}},
112 [BOUNDING_BOX] = {{WHITE1, BLACK1_LOW_TRANS}},
113 [PRESSURE_TEXT] = {{KILLARNEY1, BLACK1_LOW_TRANS}},
114 [BACKGROUND] = {{SPRINGWOOD1, BLACK1_LOW_TRANS}},
117 #define plot_info_size(nr) (sizeof(struct plot_info) + (nr)*sizeof(struct plot_data))
119 /* Scale to 0,0 -> maxx,maxy */
120 #define SCALEX(gc,x) (((x)-gc->leftx)/(gc->rightx-gc->leftx)*gc->maxx)
121 #define SCALEY(gc,y) (((y)-gc->topy)/(gc->bottomy-gc->topy)*gc->maxy)
122 #define SCALE(gc,x,y) SCALEX(gc,x),SCALEY(gc,y)
124 static void move_to(struct graphics_context *gc, double x, double y)
126 cairo_move_to(gc->cr, SCALE(gc, x, y));
129 static void line_to(struct graphics_context *gc, double x, double y)
131 cairo_line_to(gc->cr, SCALE(gc, x, y));
134 static void set_source_rgba(struct graphics_context *gc, color_indice_t c)
136 const color_t *col = &profile_color[c];
137 struct rgba rgb = col->media[gc->printer];
143 cairo_set_source_rgba(gc->cr, r, g, b, a);
146 void init_profile_background(struct graphics_context *gc)
148 set_source_rgba(gc, BACKGROUND);
151 void pattern_add_color_stop_rgba(struct graphics_context *gc, cairo_pattern_t *pat, double o, color_indice_t c)
153 const color_t *col = &profile_color[c];
154 struct rgba rgb = col->media[gc->printer];
155 cairo_pattern_add_color_stop_rgba(pat, o, rgb.r, rgb.g, rgb.b, rgb.a);
158 #define ROUND_UP(x,y) ((((x)+(y)-1)/(y))*(y))
160 /* debugging tool - not normally used */
161 static void dump_pi (struct plot_info *pi)
165 printf("pi:{nr:%d maxtime:%d meandepth:%d maxdepth:%d \n"
166 " maxpressure:%d mintemp:%d maxtemp:%d\n",
167 pi->nr, pi->maxtime, pi->meandepth, pi->maxdepth,
168 pi->maxpressure, pi->mintemp, pi->maxtemp);
169 for (i = 0; i < pi->nr; i++)
170 printf(" entry[%d]:{same_cylinder:%d cylinderindex:%d sec:%d pressure:{%d,%d}\n"
171 " time:%d:%02d temperature:%d depth:%d smoothed:%d}\n",
172 i, pi->entry[i].same_cylinder, pi->entry[i].cylinderindex, pi->entry[i].sec,
173 pi->entry[i].pressure[0], pi->entry[i].pressure[1],
174 pi->entry[i].sec / 60, pi->entry[i].sec % 60,
175 pi->entry[i].temperature, pi->entry[i].depth, pi->entry[i].smoothed);
180 * When showing dive profiles, we scale things to the
181 * current dive. However, we don't scale past less than
182 * 30 minutes or 90 ft, just so that small dives show
184 * If the dive time is shorter than 10 minutes we assume that
185 * this has been an apnea dive and display it accordingly.
186 * we also need to add 180 seconds at the end so the min/max
189 static int get_maxtime(struct plot_info *pi)
191 int seconds = pi->maxtime;
193 /* Possible apnea dive, we scale accordingly */
194 return ROUND_UP(seconds+seconds/4, 60);
196 /* min 30 minutes, rounded up to 5 minutes, with at least 2.5 minutes to spare */
197 return MAX(30*60, ROUND_UP(seconds+150, 60*5));
201 static int get_maxdepth(struct plot_info *pi)
203 unsigned mm = pi->maxdepth;
204 /* Minimum 30m, rounded up to 10m, with at least 3m to spare */
205 return MAX(30000, ROUND_UP(mm+3000, 10000));
210 color_indice_t color;
212 } text_render_options_t;
215 #define CENTER (-0.5)
222 static void plot_text(struct graphics_context *gc, const text_render_options_t *tro,
223 double x, double y, const char *fmt, ...)
225 cairo_t *cr = gc->cr;
226 cairo_font_extents_t fe;
227 cairo_text_extents_t extents;
233 vsnprintf(buffer, sizeof(buffer), fmt, args);
236 cairo_set_font_size(cr, tro->size);
237 cairo_font_extents(cr, &fe);
238 cairo_text_extents(cr, buffer, &extents);
239 dx = tro->hpos * extents.width + extents.x_bearing;
240 dy = tro->vpos * extents.height + fe.descent;
243 cairo_rel_move_to(cr, dx, dy);
245 cairo_text_path(cr, buffer);
246 set_source_rgba(gc, TEXT_BACKGROUND);
250 cairo_rel_move_to(cr, dx, dy);
252 set_source_rgba(gc, tro->color);
253 cairo_show_text(cr, buffer);
260 static struct ev_select *ev_namelist;
261 static int evn_allocated;
264 void evn_foreach(void (*callback)(const char *, int *, void *), void *data)
268 for (i = 0; i < evn_used; i++) {
269 callback(ev_namelist[i].ev_name, &ev_namelist[i].plot_ev, data);
273 void remember_event(const char *eventname)
277 if (!eventname || (len = strlen(eventname)) == 0)
279 while (i < evn_used) {
280 if (!strncmp(eventname,ev_namelist[i].ev_name,len))
284 if (evn_used == evn_allocated) {
286 ev_namelist = realloc(ev_namelist, evn_allocated * sizeof(struct ev_select));
288 /* we are screwed, but let's just bail out */
291 ev_namelist[evn_used].ev_name = strdup(eventname);
292 ev_namelist[evn_used].plot_ev = TRUE;
296 static void plot_one_event(struct graphics_context *gc, struct plot_info *pi, struct event *event, const text_render_options_t *tro)
301 /* is plotting this event disabled? */
303 for (i = 0; i < evn_used; i++) {
304 if (! strcmp(event->name, ev_namelist[i].ev_name)) {
305 if (ev_namelist[i].plot_ev)
312 for (i = 0; i < pi->nr; i++) {
313 struct plot_data *data = pi->entry + i;
314 if (event->time.seconds < data->sec)
318 /* draw a little tirangular marker and attach tooltip */
319 x = SCALEX(gc, event->time.seconds);
320 y = SCALEY(gc, depth);
321 set_source_rgba(gc, ALERT_BG);
322 cairo_move_to(gc->cr, x-15, y+6);
323 cairo_line_to(gc->cr, x-3 , y+6);
324 cairo_line_to(gc->cr, x-9, y-6);
325 cairo_line_to(gc->cr, x-15, y+6);
326 cairo_stroke_preserve(gc->cr);
328 set_source_rgba(gc, ALERT_FG);
329 cairo_move_to(gc->cr, x-9, y-3);
330 cairo_line_to(gc->cr, x-9, y+1);
331 cairo_move_to(gc->cr, x-9, y+4);
332 cairo_line_to(gc->cr, x-9, y+4);
333 cairo_stroke(gc->cr);
334 attach_tooltip(x-15, y-6, 12, 12, event->name);
337 static void plot_events(struct graphics_context *gc, struct plot_info *pi, struct dive *dive)
339 static const text_render_options_t tro = {14, EVENTS, CENTER, TOP};
340 struct event *event = dive->events;
346 plot_one_event(gc, pi, event, &tro);
351 static void render_depth_sample(struct graphics_context *gc, struct plot_data *entry, const text_render_options_t *tro)
353 int sec = entry->sec, decimals;
356 d = get_depth_units(entry->depth, &decimals, NULL);
358 plot_text(gc, tro, sec, entry->depth, "%.*f", decimals, d);
361 static void plot_text_samples(struct graphics_context *gc, struct plot_info *pi)
363 static const text_render_options_t deep = {14, SAMPLE_DEEP, CENTER, TOP};
364 static const text_render_options_t shallow = {14, SAMPLE_SHALLOW, CENTER, BOTTOM};
368 for (i = 0; i < pi->nr; i++) {
369 struct plot_data *entry = pi->entry + i;
371 if (entry->depth < 2000)
374 if ((entry == entry->max[2]) && entry->depth != last) {
375 render_depth_sample(gc, entry, &deep);
379 if ((entry == entry->min[2]) && entry->depth != last) {
380 render_depth_sample(gc, entry, &shallow);
384 if (entry->depth != last)
389 static void plot_depth_text(struct graphics_context *gc, struct plot_info *pi)
391 int maxtime, maxdepth;
393 /* Get plot scaling limits */
394 maxtime = get_maxtime(pi);
395 maxdepth = get_maxdepth(pi);
397 gc->leftx = 0; gc->rightx = maxtime;
398 gc->topy = 0; gc->bottomy = maxdepth;
400 plot_text_samples(gc, pi);
403 static void plot_smoothed_profile(struct graphics_context *gc, struct plot_info *pi)
406 struct plot_data *entry = pi->entry;
408 set_source_rgba(gc, SMOOTHED);
409 move_to(gc, entry->sec, entry->smoothed);
410 for (i = 1; i < pi->nr; i++) {
412 line_to(gc, entry->sec, entry->smoothed);
414 cairo_stroke(gc->cr);
417 static void plot_minmax_profile_minute(struct graphics_context *gc, struct plot_info *pi,
421 struct plot_data *entry = pi->entry;
423 set_source_rgba(gc, MINUTE);
424 move_to(gc, entry->sec, entry->min[index]->depth);
425 for (i = 1; i < pi->nr; i++) {
427 line_to(gc, entry->sec, entry->min[index]->depth);
429 for (i = 1; i < pi->nr; i++) {
430 line_to(gc, entry->sec, entry->max[index]->depth);
433 cairo_close_path(gc->cr);
437 static void plot_minmax_profile(struct graphics_context *gc, struct plot_info *pi)
441 plot_minmax_profile_minute(gc, pi, 2);
442 plot_minmax_profile_minute(gc, pi, 1);
443 plot_minmax_profile_minute(gc, pi, 0);
446 static void plot_depth_profile(struct graphics_context *gc, struct plot_info *pi)
449 cairo_t *cr = gc->cr;
451 struct plot_data *entry;
452 int maxtime, maxdepth, marker;
453 int increments[4] = { 5*60, 10*60, 15*60, 30*60 };
455 /* Get plot scaling limits */
456 maxtime = get_maxtime(pi);
457 maxdepth = get_maxdepth(pi);
458 /* We check whether this has been an apnea dive and overwrite
459 * the increments in order to get reasonable time markers */
466 /* Time markers: at most every 5 min, but no more than 12 markers
467 * and for convenience we do 5, 10, 15 or 30 min intervals.
468 * This allows for 6h dives - enough (I hope) for even the craziest
469 * divers - but just in case, for those 8h depth-record-breaking dives,
470 * we double the interval if this still doesn't get us to 12 or fewer
473 while (maxtime / increments[i] > 12 && i < 4)
475 incr = increments[i];
476 while (maxtime / incr > 12)
479 gc->leftx = 0; gc->rightx = maxtime;
480 gc->topy = 0; gc->bottomy = 1.0;
481 set_source_rgba(gc, TIME_GRID);
482 cairo_set_line_width(gc->cr, 2);
484 for (i = incr; i < maxtime; i += incr) {
490 /* now the text on the time markers */
491 text_render_options_t tro = {10, TIME_TEXT, CENTER, TOP};
493 /* Be a bit more verbose with shorter (apnea) dives */
494 for (i = incr; i < maxtime; i += incr)
495 plot_text(gc, &tro, i, 1, "%d:%d", i/60, i%60);
497 /* Only render the time on every second marker for normal dives */
498 for (i = incr; i < maxtime; i += 2 * incr)
499 plot_text(gc, &tro, i, 1, "%d", i/60);
501 /* Depth markers: every 30 ft or 10 m*/
502 gc->leftx = 0; gc->rightx = 1.0;
503 gc->topy = 0; gc->bottomy = maxdepth;
504 switch (output_units.length) {
505 case METERS: marker = 10000; break;
506 case FEET: marker = 9144; break; /* 30 ft */
509 set_source_rgba(gc, DEPTH_GRID);
510 for (i = marker; i < maxdepth; i += marker) {
516 /* Show mean depth */
518 set_source_rgba(gc, MEAN_DEPTH);
519 move_to(gc, 0, pi->meandepth);
520 line_to(gc, 1, pi->meandepth);
524 gc->leftx = 0; gc->rightx = maxtime;
527 * These are good for debugging text placement etc,
528 * but not for actual display..
531 plot_smoothed_profile(gc, pi);
532 plot_minmax_profile(gc, pi);
535 /* Do the depth profile for the neat fill */
536 gc->topy = 0; gc->bottomy = maxdepth;
538 cairo_pattern_t *pat;
539 pat = cairo_pattern_create_linear (0.0, 0.0, 0.0, 256.0);
540 pattern_add_color_stop_rgba (gc, pat, 1, DEPTH_BOTTOM);
541 pattern_add_color_stop_rgba (gc, pat, 0, DEPTH_TOP);
543 cairo_set_source(gc->cr, pat);
544 cairo_pattern_destroy(pat);
545 cairo_set_line_width(gc->cr, 2);
549 for (i = 0; i < pi->nr; i++, entry++)
550 line_to(gc, entry->sec, entry->depth);
551 cairo_close_path(gc->cr);
555 /* Now do it again for the velocity colors */
557 for (i = 1; i < pi->nr; i++) {
560 /* we want to draw the segments in different colors
561 * representing the vertical velocity, so we need to
562 * chop this into short segments */
563 depth = entry->depth;
564 set_source_rgba(gc, VELOCITY_COLORS_START_IDX + entry->velocity);
565 move_to(gc, entry[-1].sec, entry[-1].depth);
566 line_to(gc, sec, depth);
571 static int setup_temperature_limits(struct graphics_context *gc, struct plot_info *pi)
573 int maxtime, mintemp, maxtemp, delta;
575 /* Get plot scaling limits */
576 maxtime = get_maxtime(pi);
577 mintemp = pi->mintemp;
578 maxtemp = pi->maxtemp;
580 gc->leftx = 0; gc->rightx = maxtime;
581 /* Show temperatures in roughly the lower third, but make sure the scale
582 is at least somewhat reasonable */
583 delta = maxtemp - mintemp;
584 if (delta > 3000) { /* more than 3K in fluctuation */
585 gc->topy = maxtemp + delta*2;
586 gc->bottomy = mintemp - delta/2;
588 gc->topy = maxtemp + 1500 + delta*2;
589 gc->bottomy = mintemp - delta/2;
592 return maxtemp > mintemp;
595 static void plot_single_temp_text(struct graphics_context *gc, int sec, int mkelvin)
599 static const text_render_options_t tro = {12, TEMP_TEXT, LEFT, TOP};
601 deg = get_temp_units(mkelvin, &unit);
603 plot_text(gc, &tro, sec, mkelvin, "%d%s", (int)(deg + 0.5), unit);
606 static void plot_temperature_text(struct graphics_context *gc, struct plot_info *pi)
609 int last = -300, sec = 0;
610 int last_temperature = 0, last_printed_temp = 0;
612 if (!setup_temperature_limits(gc, pi))
615 for (i = 0; i < pi->nr; i++) {
616 struct plot_data *entry = pi->entry+i;
617 int mkelvin = entry->temperature;
621 last_temperature = mkelvin;
623 /* don't print a temperature
624 * if it's been less than 5min and less than a 2K change OR
625 * if it's been less than 2min OR if the change from the
626 * last print is less than .4K (and therefore less than 1F */
627 if (((sec < last + 300) && (abs(mkelvin - last_printed_temp) < 2000)) ||
628 (sec < last + 120) ||
629 (abs(mkelvin - last_printed_temp) < 400))
632 plot_single_temp_text(gc,sec,mkelvin);
633 last_printed_temp = mkelvin;
635 /* it would be nice to print the end temperature, if it's
636 * different or if the last temperature print has been more
637 * than a quarter of the dive back */
638 if ((abs(last_temperature - last_printed_temp) > 500) ||
639 ((double)last / (double)sec < 0.75))
640 plot_single_temp_text(gc, sec, last_temperature);
643 static void plot_temperature_profile(struct graphics_context *gc, struct plot_info *pi)
646 cairo_t *cr = gc->cr;
649 if (!setup_temperature_limits(gc, pi))
652 cairo_set_line_width(gc->cr, 2);
653 set_source_rgba(gc, TEMP_PLOT);
654 for (i = 0; i < pi->nr; i++) {
655 struct plot_data *entry = pi->entry + i;
656 int mkelvin = entry->temperature;
657 int sec = entry->sec;
664 line_to(gc, sec, mkelvin);
666 move_to(gc, sec, mkelvin);
672 /* gets both the actual start and end pressure as well as the scaling factors */
673 static int get_cylinder_pressure_range(struct graphics_context *gc, struct plot_info *pi)
676 gc->rightx = get_maxtime(pi);
678 gc->bottomy = 0; gc->topy = pi->maxpressure * 1.5;
679 return pi->maxpressure != 0;
682 /* set the color for the pressure plot according to temporary sac rate
683 * as compared to avg_sac; the calculation simply maps the delta between
684 * sac and avg_sac to indexes 0 .. (SAC_COLORS - 1) with everything
685 * more than 6000 ml/min below avg_sac mapped to 0 */
687 static void set_sac_color(struct graphics_context *gc, int sac, int avg_sac)
690 int delta = sac - avg_sac + 7000;
693 sac_index = delta / 2000;
696 if (sac_index > SAC_COLORS - 1)
697 sac_index = SAC_COLORS - 1;
698 set_source_rgba(gc, SAC_COLORS_START_IDX + sac_index);
700 set_source_rgba(gc, SAC_DEFAULT);
704 /* calculate the current SAC in ml/min and convert to int */
705 #define GET_LOCAL_SAC(_entry1, _entry2, _dive) (int) \
706 ((GET_PRESSURE((_entry1)) - GET_PRESSURE((_entry2))) * \
707 (_dive)->cylinder[(_entry1)->cylinderindex].type.size.mliter / \
708 (((_entry2)->sec - (_entry1)->sec) / 60.0) / \
709 (1 + ((_entry1)->depth + (_entry2)->depth) / 20000.0) / \
712 #define SAC_WINDOW 45 /* sliding window in seconds for current SAC calculation */
714 static void plot_cylinder_pressure(struct graphics_context *gc, struct plot_info *pi,
719 int lift_pen = FALSE;
720 int first_plot = TRUE;
722 struct plot_data *last_entry = NULL;
724 if (!get_cylinder_pressure_range(gc, pi))
727 cairo_set_line_width(gc->cr, 2);
729 for (i = 0; i < pi->nr; i++) {
731 struct plot_data *entry = pi->entry + i;
733 mbar = GET_PRESSURE(entry);
734 if (!entry->same_cylinder) {
745 sac = GET_LOCAL_SAC(entry, pi->entry + i + 1, dive);
749 for (j = last; j < i; j++)
750 sac += GET_LOCAL_SAC(pi->entry + j, pi->entry + j + 1, dive);
752 if (entry->sec - last_entry->sec >= SAC_WINDOW) {
754 last_entry = pi->entry + last;
757 set_sac_color(gc, sac, dive->sac);
759 if (!first_plot && entry->same_cylinder) {
760 /* if we have a previous event from the same tank,
761 * draw at least a short line */
763 prev_pr = GET_PRESSURE(entry - 1);
764 move_to(gc, (entry-1)->sec, prev_pr);
765 line_to(gc, entry->sec, mbar);
768 move_to(gc, entry->sec, mbar);
772 line_to(gc, entry->sec, mbar);
774 cairo_stroke(gc->cr);
775 move_to(gc, entry->sec, mbar);
779 static void plot_pressure_value(struct graphics_context *gc, int mbar, int sec,
780 int xalign, int yalign)
785 pressure = get_pressure_units(mbar, &unit);
786 text_render_options_t tro = {10, PRESSURE_TEXT, xalign, yalign};
787 plot_text(gc, &tro, sec, mbar, "%d %s", pressure, unit);
790 static void plot_cylinder_pressure_text(struct graphics_context *gc, struct plot_info *pi)
794 int seen_cyl[MAX_CYLINDERS] = { FALSE, };
795 int last_pressure[MAX_CYLINDERS] = { 0, };
796 int last_time[MAX_CYLINDERS] = { 0, };
797 struct plot_data *entry;
799 if (!get_cylinder_pressure_range(gc, pi))
802 /* only loop over the actual events from the dive computer
803 * plus the second synthetic event at the start (to make sure
804 * we get "time=0" right)
805 * sadly with a recent change that first entry may no longer
806 * have any pressure reading - in that case just grab the
807 * pressure from the second entry */
808 if (GET_PRESSURE(pi->entry + 1) == 0 && GET_PRESSURE(pi->entry + 2) !=0)
809 INTERPOLATED_PRESSURE(pi->entry + 1) = GET_PRESSURE(pi->entry + 2);
810 for (i = 1; i < pi->nr; i++) {
811 entry = pi->entry + i;
813 if (!entry->same_cylinder) {
814 cyl = entry->cylinderindex;
815 if (!seen_cyl[cyl]) {
816 mbar = GET_PRESSURE(entry);
817 plot_pressure_value(gc, mbar, entry->sec, LEFT, BOTTOM);
818 seen_cyl[cyl] = TRUE;
821 /* remember the last pressure and time of
822 * the previous cylinder */
823 cyl = (entry - 1)->cylinderindex;
824 last_pressure[cyl] = GET_PRESSURE(entry - 1);
825 last_time[cyl] = (entry - 1)->sec;
829 cyl = entry->cylinderindex;
830 if (GET_PRESSURE(entry))
831 last_pressure[cyl] = GET_PRESSURE(entry);
832 last_time[cyl] = entry->sec;
834 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) {
835 if (last_time[cyl]) {
836 plot_pressure_value(gc, last_pressure[cyl], last_time[cyl], CENTER, TOP);
841 static void analyze_plot_info_minmax_minute(struct plot_data *entry, struct plot_data *first, struct plot_data *last, int index)
843 struct plot_data *p = entry;
844 int time = entry->sec;
845 int seconds = 90*(index+1);
846 struct plot_data *min, *max;
849 /* Go back 'seconds' in time */
851 if (p[-1].sec < time - seconds)
856 /* Then go forward until we hit an entry past the time */
861 int depth = p->depth;
862 if (p->sec > time + seconds)
866 if (depth < min->depth)
868 if (depth > max->depth)
871 entry->min[index] = min;
872 entry->max[index] = max;
873 entry->avg[index] = (avg + nr/2) / nr;
876 static void analyze_plot_info_minmax(struct plot_data *entry, struct plot_data *first, struct plot_data *last)
878 analyze_plot_info_minmax_minute(entry, first, last, 0);
879 analyze_plot_info_minmax_minute(entry, first, last, 1);
880 analyze_plot_info_minmax_minute(entry, first, last, 2);
883 static velocity_t velocity(int speed)
887 if (speed < -304) /* ascent faster than -60ft/min */
889 else if (speed < -152) /* above -30ft/min */
891 else if (speed < -76) /* -15ft/min */
893 else if (speed < -25) /* -5ft/min */
895 else if (speed < 25) /* very hard to find data, but it appears that the recommendations
896 for descent are usually about 2x ascent rate; still, we want
897 stable to mean stable */
899 else if (speed < 152) /* between 5 and 30ft/min is considered slow */
901 else if (speed < 304) /* up to 60ft/min is moderate */
903 else if (speed < 507) /* up to 100ft/min is fast */
905 else /* more than that is just crazy - you'll blow your ears out */
910 static struct plot_info *analyze_plot_info(struct plot_info *pi)
915 /* Do pressure min/max based on the non-surface data */
916 for (i = 0; i < nr; i++) {
917 struct plot_data *entry = pi->entry+i;
918 int pressure = GET_PRESSURE(entry);
919 int temperature = entry->temperature;
922 if (pressure > pi->maxpressure)
923 pi->maxpressure = pressure;
927 if (!pi->mintemp || temperature < pi->mintemp)
928 pi->mintemp = temperature;
929 if (temperature > pi->maxtemp)
930 pi->maxtemp = temperature;
934 /* Smoothing function: 5-point triangular smooth */
935 for (i = 2; i < nr; i++) {
936 struct plot_data *entry = pi->entry+i;
940 depth = entry[-2].depth + 2*entry[-1].depth + 3*entry[0].depth + 2*entry[1].depth + entry[2].depth;
941 entry->smoothed = (depth+4) / 9;
943 /* vertical velocity in mm/sec */
944 /* Linus wants to smooth this - let's at least look at the samples that aren't FAST or CRAZY */
945 if (entry[0].sec - entry[-1].sec) {
946 entry->velocity = velocity((entry[0].depth - entry[-1].depth) / (entry[0].sec - entry[-1].sec));
947 /* if our samples are short and we aren't too FAST*/
948 if (entry[0].sec - entry[-1].sec < 15 && entry->velocity < FAST) {
950 while (i+past > 0 && entry[0].sec - entry[past].sec < 15)
952 entry->velocity = velocity((entry[0].depth - entry[past].depth) /
953 (entry[0].sec - entry[past].sec));
956 entry->velocity = STABLE;
959 /* One-, two- and three-minute minmax data */
960 for (i = 0; i < nr; i++) {
961 struct plot_data *entry = pi->entry +i;
962 analyze_plot_info_minmax(entry, pi->entry, pi->entry+nr);
969 * simple structure to track the beginning and end tank pressure as
970 * well as the integral of depth over time spent while we have no
971 * pressure reading from the tank */
972 typedef struct pr_track_struct pr_track_t;
973 struct pr_track_struct {
978 double pressure_time;
982 static pr_track_t *pr_track_alloc(int start, int t_start) {
983 pr_track_t *pt = malloc(sizeof(pr_track_t));
985 pt->t_start = t_start;
988 pt->pressure_time = 0.0;
993 /* poor man's linked list */
994 static pr_track_t *list_last(pr_track_t *list)
996 pr_track_t *tail = list;
1005 static pr_track_t *list_add(pr_track_t *list, pr_track_t *element)
1007 pr_track_t *tail = list_last(list);
1010 tail->next = element;
1014 static void list_free(pr_track_t *list)
1018 list_free(list->next);
1022 static void dump_pr_track(pr_track_t **track_pr)
1027 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) {
1028 list = track_pr[cyl];
1030 printf("cyl%d: start %d end %d t_start %d t_end %d pt %6.3f\n", cyl,
1031 list->start, list->end, list->t_start, list->t_end, list->pressure_time);
1037 static void fill_missing_tank_pressures(struct plot_info *pi, pr_track_t **track_pr)
1039 pr_track_t *list = NULL;
1040 pr_track_t *nlist = NULL;
1043 struct plot_data *entry;
1044 int cur_pr[MAX_CYLINDERS];
1047 /* another great debugging tool */
1048 dump_pr_track(track_pr);
1050 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) {
1051 cur_pr[cyl] = track_pr[cyl]->start;
1054 /* The first two are "fillers", but in case we don't have a sample
1055 * at time 0 we need to process the second of them here */
1056 for (i = 1; i < pi->nr; i++) {
1057 entry = pi->entry + i;
1058 if (SENSOR_PRESSURE(entry)) {
1059 cur_pr[entry->cylinderindex] = SENSOR_PRESSURE(entry);
1061 if(!list || list->t_end < entry->sec) {
1062 nlist = track_pr[entry->cylinderindex];
1064 while (nlist && nlist->t_start <= entry->sec) {
1068 /* there may be multiple segments - so
1069 * let's assemble the length */
1071 pt = list->pressure_time;
1072 while (!nlist->end) {
1073 nlist = nlist->next;
1075 /* oops - we have no end pressure,
1076 * so this means this is a tank without
1077 * gas consumption information */
1080 pt += nlist->pressure_time;
1083 /* just continue without calculating
1084 * interpolated values */
1085 INTERPOLATED_PRESSURE(entry) = cur_pr[entry->cylinderindex];
1089 magic = (nlist->end - cur_pr[entry->cylinderindex]) / pt;
1092 double cur_pt = (entry->sec - (entry-1)->sec) *
1093 (1 + (entry->depth + (entry-1)->depth) / 20000.0);
1094 INTERPOLATED_PRESSURE(entry) =
1095 cur_pr[entry->cylinderindex] + cur_pt * magic + 0.5;
1096 cur_pr[entry->cylinderindex] = INTERPOLATED_PRESSURE(entry);
1098 INTERPOLATED_PRESSURE(entry) = cur_pr[entry->cylinderindex];
1103 static int get_cylinder_index(struct dive *dive, struct event *ev)
1108 * Try to find a cylinder that matches the O2 percentage
1109 * in the gas change event 'value' field.
1111 * Crazy suunto gas change events. We really should do
1112 * this in libdivecomputer or something.
1114 for (i = 0; i < MAX_CYLINDERS; i++) {
1115 cylinder_t *cyl = dive->cylinder+i;
1116 int o2 = (cyl->gasmix.o2.permille + 5) / 10;
1117 if (o2 == ev->value)
1124 static struct event *get_next_gaschange(struct event *event)
1127 if (!strcmp(event->name, "gaschange"))
1129 event = event->next;
1134 static int set_cylinder_index(struct plot_info *pi, int i, int cylinderindex, unsigned int end)
1136 while (i < pi->nr) {
1137 struct plot_data *entry = pi->entry+i;
1138 if (entry->sec > end)
1140 if (entry->cylinderindex != cylinderindex) {
1141 entry->cylinderindex = cylinderindex;
1142 entry->pressure[0] = 0;
1149 static void check_gas_change_events(struct dive *dive, struct plot_info *pi)
1151 int i = 0, cylinderindex = 0;
1152 struct event *ev = get_next_gaschange(dive->events);
1158 i = set_cylinder_index(pi, i, cylinderindex, ev->time.seconds);
1159 cylinderindex = get_cylinder_index(dive, ev);
1160 ev = get_next_gaschange(ev->next);
1162 set_cylinder_index(pi, i, cylinderindex, ~0u);
1165 /* for computers that track gas changes through events */
1166 static int count_gas_change_events(struct dive *dive)
1169 struct event *ev = get_next_gaschange(dive->events);
1173 ev = get_next_gaschange(ev->next);
1179 * Create a plot-info with smoothing and ranged min/max
1181 * This also makes sure that we have extra empty events on both
1182 * sides, so that you can do end-points without having to worry
1185 static struct plot_info *create_plot_info(struct dive *dive, int nr_samples, struct sample *dive_sample)
1187 int cylinderindex = -1;
1188 int lastdepth, lastindex;
1189 int i, pi_idx, nr, sec, cyl;
1191 struct plot_info *pi;
1192 pr_track_t *track_pr[MAX_CYLINDERS] = {NULL, };
1193 pr_track_t *pr_track, *current;
1194 gboolean missing_pr = FALSE;
1195 struct plot_data *entry = NULL;
1198 /* we want to potentially add synthetic plot_info elements for the gas changes */
1199 nr = nr_samples + 4 + 2 * count_gas_change_events(dive);
1200 alloc_size = plot_info_size(nr);
1201 pi = malloc(alloc_size);
1204 memset(pi, 0, alloc_size);
1206 pi_idx = 2; /* the two extra events at the start */
1207 /* check for gas changes before the samples start */
1208 ev = get_next_gaschange(dive->events);
1209 while (ev && ev->time.seconds < dive_sample->time.seconds) {
1210 entry = pi->entry + pi_idx;
1211 entry->sec = ev->time.seconds;
1212 entry->depth = 0; /* is that always correct ? */
1214 ev = get_next_gaschange(ev->next);
1216 if (ev && ev->time.seconds == dive_sample->time.seconds) {
1217 /* we already have a sample at the time of the event */
1218 ev = get_next_gaschange(ev->next);
1223 for (i = 0; i < nr_samples; i++) {
1226 struct sample *sample = dive_sample+i;
1228 entry = pi->entry + i + pi_idx;
1229 while (ev && ev->time.seconds < sample->time.seconds) {
1230 /* insert two fake plot info structures for the end of
1231 * the old tank and the start of the new tank */
1232 if (ev->time.seconds == sample->time.seconds - 1) {
1233 entry->sec = ev->time.seconds - 1;
1234 (entry+1)->sec = ev->time.seconds;
1236 entry->sec = ev->time.seconds;
1237 (entry+1)->sec = ev->time.seconds + 1;
1239 /* we need a fake depth - let's interpolate */
1241 entry->depth = sample->depth.mm -
1242 (sample->depth.mm - (sample-1)->depth.mm) / 2;
1244 entry->depth = sample->depth.mm;
1245 (entry+1)->depth = entry->depth;
1247 entry = pi->entry + i + pi_idx;
1248 ev = get_next_gaschange(ev->next);
1250 if (ev && ev->time.seconds == sample->time.seconds) {
1251 /* we already have a sample at the time of the event
1252 * just add a new one for the old tank and delay the
1253 * real even by one second (to keep time monotonous) */
1254 entry->sec = ev->time.seconds;
1255 entry->depth = sample->depth.mm;
1257 entry = pi->entry + i + pi_idx;
1258 ev = get_next_gaschange(ev->next);
1261 sec = entry->sec = sample->time.seconds + delay;
1262 depth = entry->depth = sample->depth.mm;
1263 entry->cylinderindex = sample->cylinderindex;
1264 SENSOR_PRESSURE(entry) = sample->cylinderpressure.mbar;
1265 entry->temperature = sample->temperature.mkelvin;
1267 if (depth || lastdepth)
1268 lastindex = i + pi_idx;
1271 if (depth > pi->maxdepth)
1272 pi->maxdepth = depth;
1274 entry = pi->entry + i + pi_idx;
1275 /* are there still unprocessed gas changes? that would be very strange */
1277 entry->sec = ev->time.seconds;
1278 entry->depth = 0; /* why are there gas changes after the dive is over? */
1280 entry = pi->entry + i + pi_idx;
1281 ev = get_next_gaschange(ev->next);
1283 nr = nr_samples + pi_idx - 2;
1284 check_gas_change_events(dive, pi);
1286 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) /* initialize the start pressures */
1287 track_pr[cyl] = pr_track_alloc(dive->cylinder[cyl].start.mbar, -1);
1288 current = track_pr[pi->entry[2].cylinderindex];
1289 for (i = 0; i < nr + 1; i++) {
1290 entry = pi->entry + i + 1;
1292 entry->same_cylinder = entry->cylinderindex == cylinderindex;
1293 cylinderindex = entry->cylinderindex;
1295 /* track the segments per cylinder and their pressure/time integral */
1296 if (!entry->same_cylinder) {
1297 current->end = SENSOR_PRESSURE(entry-1);
1298 current->t_end = (entry-1)->sec;
1299 current = pr_track_alloc(SENSOR_PRESSURE(entry), entry->sec);
1300 track_pr[cylinderindex] = list_add(track_pr[cylinderindex], current);
1301 } else { /* same cylinder */
1302 if ((!SENSOR_PRESSURE(entry) && SENSOR_PRESSURE(entry-1)) ||
1303 (SENSOR_PRESSURE(entry) && !SENSOR_PRESSURE(entry-1))) {
1304 /* transmitter changed its working status */
1305 current->end = SENSOR_PRESSURE(entry-1);
1306 current->t_end = (entry-1)->sec;
1307 current = pr_track_alloc(SENSOR_PRESSURE(entry), entry->sec);
1308 track_pr[cylinderindex] =
1309 list_add(track_pr[cylinderindex], current);
1312 /* finally, do the discrete integration to get the SAC rate equivalent */
1313 current->pressure_time += (entry->sec - (entry-1)->sec) *
1314 (1 + (entry->depth + (entry-1)->depth) / 20000.0);
1315 missing_pr |= !SENSOR_PRESSURE(entry);
1319 current->t_end = entry->sec;
1321 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) { /* initialize the end pressures */
1322 int pr = dive->cylinder[cyl].end.mbar;
1323 if (pr && track_pr[cyl]) {
1324 pr_track = list_last(track_pr[cyl]);
1328 /* Fill in the last two entries with empty values but valid times
1329 * without creating a false cylinder change event */
1331 pi->entry[i].sec = sec + 20;
1332 pi->entry[i].same_cylinder = 1;
1333 pi->entry[i].cylinderindex = pi->entry[i-1].cylinderindex;
1334 INTERPOLATED_PRESSURE(pi->entry + i) = GET_PRESSURE(pi->entry + i - 1);
1335 pi->entry[i+1].sec = sec + 40;
1336 pi->entry[i+1].same_cylinder = 1;
1337 pi->entry[i+1].cylinderindex = pi->entry[i-1].cylinderindex;
1338 INTERPOLATED_PRESSURE(pi->entry + i + 1) = GET_PRESSURE(pi->entry + i - 1);
1339 /* the number of actual entries - some computers have lots of
1340 * depth 0 samples at the end of a dive, we want to make sure
1341 * we have exactly one of them at the end */
1342 pi->nr = lastindex+1;
1343 while (pi->nr <= i+2 && pi->entry[pi->nr-1].depth > 0)
1345 pi->maxtime = pi->entry[lastindex].sec;
1347 /* Analyze_plot_info() will do the sample max pressures,
1348 * this handles the manual pressures
1350 pi->maxpressure = 0;
1351 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) {
1352 unsigned int mbar = dive->cylinder[cyl].start.mbar;
1353 if (mbar > pi->maxpressure)
1354 pi->maxpressure = mbar;
1357 pi->meandepth = dive->meandepth.mm;
1360 fill_missing_tank_pressures(pi, track_pr);
1362 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++)
1363 list_free(track_pr[cyl]);
1364 if (0) /* awesome for debugging - not useful otherwise */
1366 return analyze_plot_info(pi);
1369 void plot(struct graphics_context *gc, cairo_rectangle_int_t *drawing_area, struct dive *dive)
1371 struct plot_info *pi;
1372 static struct sample fake[4];
1373 struct sample *sample = dive->sample;
1374 int nr = dive->samples;
1377 int duration = dive->duration.seconds;
1378 int maxdepth = dive->maxdepth.mm;
1380 fake[1].time.seconds = duration * 0.05;
1381 fake[1].depth.mm = maxdepth;
1382 fake[2].time.seconds = duration * 0.95;
1383 fake[2].depth.mm = maxdepth;
1384 fake[3].time.seconds = duration * 1.00;
1388 pi = create_plot_info(dive, nr, sample);
1390 cairo_translate(gc->cr, drawing_area->x, drawing_area->y);
1391 cairo_set_line_width(gc->cr, 1);
1392 cairo_set_line_cap(gc->cr, CAIRO_LINE_CAP_ROUND);
1393 cairo_set_line_join(gc->cr, CAIRO_LINE_JOIN_ROUND);
1396 * We can use "cairo_translate()" because that doesn't
1397 * scale line width etc. But the actual scaling we need
1398 * do set up ourselves..
1400 * Snif. What a pity.
1402 gc->maxx = (drawing_area->width - 2*drawing_area->x);
1403 gc->maxy = (drawing_area->height - 2*drawing_area->y);
1406 plot_depth_profile(gc, pi);
1407 plot_events(gc, pi, dive);
1409 /* Temperature profile */
1410 plot_temperature_profile(gc, pi);
1412 /* Cylinder pressure plot */
1413 plot_cylinder_pressure(gc, pi, dive);
1415 /* Text on top of all graphs.. */
1416 plot_temperature_text(gc, pi);
1417 plot_depth_text(gc, pi);
1418 plot_cylinder_pressure_text(gc, pi);
1420 /* Bounding box last */
1421 gc->leftx = 0; gc->rightx = 1.0;
1422 gc->topy = 0; gc->bottomy = 1.0;
1424 set_source_rgba(gc, BOUNDING_BOX);
1425 cairo_set_line_width(gc->cr, 1);
1430 cairo_close_path(gc->cr);
1431 cairo_stroke(gc->cr);