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;
194 /* Possible apnea dive, we scale accordingly */
195 return ROUND_UP(seconds+seconds/4, 60);
197 /* min 30 minutes, rounded up to 5 minutes, with at least 2.5 minutes to spare */
198 return MAX(30*60, ROUND_UP(seconds+150, 60*5));
202 static int get_maxdepth(struct plot_info *pi)
204 unsigned mm = pi->maxdepth;
205 /* Minimum 30m, rounded up to 10m, with at least 3m to spare */
206 return MAX(30000, ROUND_UP(mm+3000, 10000));
211 color_indice_t color;
213 } text_render_options_t;
216 #define CENTER (-0.5)
223 static void plot_text(struct graphics_context *gc, const text_render_options_t *tro,
224 double x, double y, const char *fmt, ...)
226 cairo_t *cr = gc->cr;
227 cairo_font_extents_t fe;
228 cairo_text_extents_t extents;
234 vsnprintf(buffer, sizeof(buffer), fmt, args);
237 cairo_set_font_size(cr, tro->size);
238 cairo_font_extents(cr, &fe);
239 cairo_text_extents(cr, buffer, &extents);
240 dx = tro->hpos * extents.width + extents.x_bearing;
241 dy = tro->vpos * extents.height + fe.descent;
244 cairo_rel_move_to(cr, dx, dy);
246 cairo_text_path(cr, buffer);
247 set_source_rgba(gc, TEXT_BACKGROUND);
251 cairo_rel_move_to(cr, dx, dy);
253 set_source_rgba(gc, tro->color);
254 cairo_show_text(cr, buffer);
261 static struct ev_select *ev_namelist;
262 static int evn_allocated;
265 void evn_foreach(void (*callback)(const char *, int *, void *), void *data)
269 for (i = 0; i < evn_used; i++) {
270 callback(ev_namelist[i].ev_name, &ev_namelist[i].plot_ev, data);
274 void remember_event(const char *eventname)
278 if (!eventname || (len = strlen(eventname)) == 0)
280 while (i < evn_used) {
281 if (!strncmp(eventname,ev_namelist[i].ev_name,len))
285 if (evn_used == evn_allocated) {
287 ev_namelist = realloc(ev_namelist, evn_allocated * sizeof(struct ev_select));
289 /* we are screwed, but let's just bail out */
292 ev_namelist[evn_used].ev_name = strdup(eventname);
293 ev_namelist[evn_used].plot_ev = TRUE;
297 static void plot_one_event(struct graphics_context *gc, struct plot_info *pi, struct event *event, const text_render_options_t *tro)
302 /* is plotting this event disabled? */
304 for (i = 0; i < evn_used; i++) {
305 if (! strcmp(event->name, ev_namelist[i].ev_name)) {
306 if (ev_namelist[i].plot_ev)
313 for (i = 0; i < pi->nr; i++) {
314 struct plot_data *data = pi->entry + i;
315 if (event->time.seconds < data->sec)
319 /* draw a little tirangular marker and attach tooltip */
320 x = SCALEX(gc, event->time.seconds);
321 y = SCALEY(gc, depth);
322 set_source_rgba(gc, ALERT_BG);
323 cairo_move_to(gc->cr, x-15, y+6);
324 cairo_line_to(gc->cr, x-3 , y+6);
325 cairo_line_to(gc->cr, x-9, y-6);
326 cairo_line_to(gc->cr, x-15, y+6);
327 cairo_stroke_preserve(gc->cr);
329 set_source_rgba(gc, ALERT_FG);
330 cairo_move_to(gc->cr, x-9, y-3);
331 cairo_line_to(gc->cr, x-9, y+1);
332 cairo_move_to(gc->cr, x-9, y+4);
333 cairo_line_to(gc->cr, x-9, y+4);
334 cairo_stroke(gc->cr);
335 attach_tooltip(x-15, y-6, 12, 12, event->name);
338 static void plot_events(struct graphics_context *gc, struct plot_info *pi, struct dive *dive)
340 static const text_render_options_t tro = {14, EVENTS, CENTER, TOP};
341 struct event *event = dive->events;
347 plot_one_event(gc, pi, event, &tro);
352 static void render_depth_sample(struct graphics_context *gc, struct plot_data *entry, const text_render_options_t *tro)
354 int sec = entry->sec, decimals;
357 d = get_depth_units(entry->depth, &decimals, NULL);
359 plot_text(gc, tro, sec, entry->depth, "%.*f", decimals, d);
362 static void plot_text_samples(struct graphics_context *gc, struct plot_info *pi)
364 static const text_render_options_t deep = {14, SAMPLE_DEEP, CENTER, TOP};
365 static const text_render_options_t shallow = {14, SAMPLE_SHALLOW, CENTER, BOTTOM};
369 for (i = 0; i < pi->nr; i++) {
370 struct plot_data *entry = pi->entry + i;
372 if (entry->depth < 2000)
375 if ((entry == entry->max[2]) && entry->depth != last) {
376 render_depth_sample(gc, entry, &deep);
380 if ((entry == entry->min[2]) && entry->depth != last) {
381 render_depth_sample(gc, entry, &shallow);
385 if (entry->depth != last)
390 static void plot_depth_text(struct graphics_context *gc, struct plot_info *pi)
392 int maxtime, maxdepth;
394 /* Get plot scaling limits */
395 maxtime = get_maxtime(pi);
396 maxdepth = get_maxdepth(pi);
398 gc->leftx = 0; gc->rightx = maxtime;
399 gc->topy = 0; gc->bottomy = maxdepth;
401 plot_text_samples(gc, pi);
404 static void plot_smoothed_profile(struct graphics_context *gc, struct plot_info *pi)
407 struct plot_data *entry = pi->entry;
409 set_source_rgba(gc, SMOOTHED);
410 move_to(gc, entry->sec, entry->smoothed);
411 for (i = 1; i < pi->nr; i++) {
413 line_to(gc, entry->sec, entry->smoothed);
415 cairo_stroke(gc->cr);
418 static void plot_minmax_profile_minute(struct graphics_context *gc, struct plot_info *pi,
422 struct plot_data *entry = pi->entry;
424 set_source_rgba(gc, MINUTE);
425 move_to(gc, entry->sec, entry->min[index]->depth);
426 for (i = 1; i < pi->nr; i++) {
428 line_to(gc, entry->sec, entry->min[index]->depth);
430 for (i = 1; i < pi->nr; i++) {
431 line_to(gc, entry->sec, entry->max[index]->depth);
434 cairo_close_path(gc->cr);
438 static void plot_minmax_profile(struct graphics_context *gc, struct plot_info *pi)
442 plot_minmax_profile_minute(gc, pi, 2);
443 plot_minmax_profile_minute(gc, pi, 1);
444 plot_minmax_profile_minute(gc, pi, 0);
447 static void plot_depth_profile(struct graphics_context *gc, struct plot_info *pi)
450 cairo_t *cr = gc->cr;
452 struct plot_data *entry;
453 int maxtime, maxdepth, marker;
454 int increments[4] = { 5*60, 10*60, 15*60, 30*60 };
456 /* Get plot scaling limits */
457 maxtime = get_maxtime(pi);
458 maxdepth = get_maxdepth(pi);
459 /* We check whether this has been an apnea dive and overwrite
460 * the increments in order to get reasonable time markers */
466 increments[3] = 5*60;
468 /* Time markers: at most every 5 min, but no more than 12 markers
469 * and for convenience we do 5, 10, 15 or 30 min intervals.
470 * This allows for 6h dives - enough (I hope) for even the craziest
471 * divers - but just in case, for those 8h depth-record-breaking dives,
472 * we double the interval if this still doesn't get us to 12 or fewer
475 while (maxtime / increments[i] > 12 && i < 4)
477 incr = increments[i];
478 while (maxtime / incr > 12)
481 gc->leftx = 0; gc->rightx = maxtime;
482 gc->topy = 0; gc->bottomy = 1.0;
483 set_source_rgba(gc, TIME_GRID);
484 cairo_set_line_width(gc->cr, 2);
486 for (i = incr; i < maxtime; i += incr) {
492 /* now the text on the time markers */
493 text_render_options_t tro = {10, TIME_TEXT, CENTER, TOP};
496 /* Be a bit more verbose with shorter (apnea) dives */
497 for (i = incr; i < maxtime; i += incr)
498 plot_text(gc, &tro, i, 1, "%d:%d", i/60, i%60);
500 /* Only render the time on every second marker for normal dives */
501 for (i = incr; i < maxtime; i += 2 * incr)
502 plot_text(gc, &tro, i, 1, "%d", i/60);
504 /* Depth markers: every 30 ft or 10 m*/
505 gc->leftx = 0; gc->rightx = 1.0;
506 gc->topy = 0; gc->bottomy = maxdepth;
507 switch (output_units.length) {
508 case METERS: marker = 10000; break;
509 case FEET: marker = 9144; break; /* 30 ft */
512 set_source_rgba(gc, DEPTH_GRID);
513 for (i = marker; i < maxdepth; i += marker) {
519 /* Show mean depth */
521 set_source_rgba(gc, MEAN_DEPTH);
522 move_to(gc, 0, pi->meandepth);
523 line_to(gc, 1, pi->meandepth);
527 gc->leftx = 0; gc->rightx = maxtime;
530 * These are good for debugging text placement etc,
531 * but not for actual display..
534 plot_smoothed_profile(gc, pi);
535 plot_minmax_profile(gc, pi);
538 /* Do the depth profile for the neat fill */
539 gc->topy = 0; gc->bottomy = maxdepth;
541 cairo_pattern_t *pat;
542 pat = cairo_pattern_create_linear (0.0, 0.0, 0.0, 256.0);
543 pattern_add_color_stop_rgba (gc, pat, 1, DEPTH_BOTTOM);
544 pattern_add_color_stop_rgba (gc, pat, 0, DEPTH_TOP);
546 cairo_set_source(gc->cr, pat);
547 cairo_pattern_destroy(pat);
548 cairo_set_line_width(gc->cr, 2);
552 for (i = 0; i < pi->nr; i++, entry++)
553 line_to(gc, entry->sec, entry->depth);
554 cairo_close_path(gc->cr);
558 /* Now do it again for the velocity colors */
560 for (i = 1; i < pi->nr; i++) {
563 /* we want to draw the segments in different colors
564 * representing the vertical velocity, so we need to
565 * chop this into short segments */
566 depth = entry->depth;
567 set_source_rgba(gc, VELOCITY_COLORS_START_IDX + entry->velocity);
568 move_to(gc, entry[-1].sec, entry[-1].depth);
569 line_to(gc, sec, depth);
574 static int setup_temperature_limits(struct graphics_context *gc, struct plot_info *pi)
576 int maxtime, mintemp, maxtemp, delta;
578 /* Get plot scaling limits */
579 maxtime = get_maxtime(pi);
580 mintemp = pi->mintemp;
581 maxtemp = pi->maxtemp;
583 gc->leftx = 0; gc->rightx = maxtime;
584 /* Show temperatures in roughly the lower third, but make sure the scale
585 is at least somewhat reasonable */
586 delta = maxtemp - mintemp;
587 if (delta > 3000) { /* more than 3K in fluctuation */
588 gc->topy = maxtemp + delta*2;
589 gc->bottomy = mintemp - delta/2;
591 gc->topy = maxtemp + 1500 + delta*2;
592 gc->bottomy = mintemp - delta/2;
595 return maxtemp > mintemp;
598 static void plot_single_temp_text(struct graphics_context *gc, int sec, int mkelvin)
602 static const text_render_options_t tro = {12, TEMP_TEXT, LEFT, TOP};
604 deg = get_temp_units(mkelvin, &unit);
606 plot_text(gc, &tro, sec, mkelvin, "%d%s", (int)(deg + 0.5), unit);
609 static void plot_temperature_text(struct graphics_context *gc, struct plot_info *pi)
612 int last = -300, sec = 0;
613 int last_temperature = 0, last_printed_temp = 0;
615 if (!setup_temperature_limits(gc, pi))
618 for (i = 0; i < pi->nr; i++) {
619 struct plot_data *entry = pi->entry+i;
620 int mkelvin = entry->temperature;
624 last_temperature = mkelvin;
626 /* don't print a temperature
627 * if it's been less than 5min and less than a 2K change OR
628 * if it's been less than 2min OR if the change from the
629 * last print is less than .4K (and therefore less than 1F */
630 if (((sec < last + 300) && (abs(mkelvin - last_printed_temp) < 2000)) ||
631 (sec < last + 120) ||
632 (abs(mkelvin - last_printed_temp) < 400))
635 plot_single_temp_text(gc,sec,mkelvin);
636 last_printed_temp = mkelvin;
638 /* it would be nice to print the end temperature, if it's
639 * different or if the last temperature print has been more
640 * than a quarter of the dive back */
641 if ((abs(last_temperature - last_printed_temp) > 500) ||
642 ((double)last / (double)sec < 0.75))
643 plot_single_temp_text(gc, sec, last_temperature);
646 static void plot_temperature_profile(struct graphics_context *gc, struct plot_info *pi)
649 cairo_t *cr = gc->cr;
652 if (!setup_temperature_limits(gc, pi))
655 cairo_set_line_width(gc->cr, 2);
656 set_source_rgba(gc, TEMP_PLOT);
657 for (i = 0; i < pi->nr; i++) {
658 struct plot_data *entry = pi->entry + i;
659 int mkelvin = entry->temperature;
660 int sec = entry->sec;
667 line_to(gc, sec, mkelvin);
669 move_to(gc, sec, mkelvin);
675 /* gets both the actual start and end pressure as well as the scaling factors */
676 static int get_cylinder_pressure_range(struct graphics_context *gc, struct plot_info *pi)
679 gc->rightx = get_maxtime(pi);
681 gc->bottomy = 0; gc->topy = pi->maxpressure * 1.5;
682 return pi->maxpressure != 0;
685 /* set the color for the pressure plot according to temporary sac rate
686 * as compared to avg_sac; the calculation simply maps the delta between
687 * sac and avg_sac to indexes 0 .. (SAC_COLORS - 1) with everything
688 * more than 6000 ml/min below avg_sac mapped to 0 */
690 static void set_sac_color(struct graphics_context *gc, int sac, int avg_sac)
693 int delta = sac - avg_sac + 7000;
696 sac_index = delta / 2000;
699 if (sac_index > SAC_COLORS - 1)
700 sac_index = SAC_COLORS - 1;
701 set_source_rgba(gc, SAC_COLORS_START_IDX + sac_index);
703 set_source_rgba(gc, SAC_DEFAULT);
707 /* calculate the current SAC in ml/min and convert to int */
708 #define GET_LOCAL_SAC(_entry1, _entry2, _dive) (int) \
709 ((GET_PRESSURE((_entry1)) - GET_PRESSURE((_entry2))) * \
710 (_dive)->cylinder[(_entry1)->cylinderindex].type.size.mliter / \
711 (((_entry2)->sec - (_entry1)->sec) / 60.0) / \
712 (1 + ((_entry1)->depth + (_entry2)->depth) / 20000.0) / \
715 #define SAC_WINDOW 45 /* sliding window in seconds for current SAC calculation */
717 static void plot_cylinder_pressure(struct graphics_context *gc, struct plot_info *pi,
722 int lift_pen = FALSE;
723 int first_plot = TRUE;
725 struct plot_data *last_entry = NULL;
727 if (!get_cylinder_pressure_range(gc, pi))
730 cairo_set_line_width(gc->cr, 2);
732 for (i = 0; i < pi->nr; i++) {
734 struct plot_data *entry = pi->entry + i;
736 mbar = GET_PRESSURE(entry);
737 if (!entry->same_cylinder) {
748 sac = GET_LOCAL_SAC(entry, pi->entry + i + 1, dive);
752 for (j = last; j < i; j++)
753 sac += GET_LOCAL_SAC(pi->entry + j, pi->entry + j + 1, dive);
755 if (entry->sec - last_entry->sec >= SAC_WINDOW) {
757 last_entry = pi->entry + last;
760 set_sac_color(gc, sac, dive->sac);
762 if (!first_plot && entry->same_cylinder) {
763 /* if we have a previous event from the same tank,
764 * draw at least a short line */
766 prev_pr = GET_PRESSURE(entry - 1);
767 move_to(gc, (entry-1)->sec, prev_pr);
768 line_to(gc, entry->sec, mbar);
771 move_to(gc, entry->sec, mbar);
775 line_to(gc, entry->sec, mbar);
777 cairo_stroke(gc->cr);
778 move_to(gc, entry->sec, mbar);
782 static void plot_pressure_value(struct graphics_context *gc, int mbar, int sec,
783 int xalign, int yalign)
788 pressure = get_pressure_units(mbar, &unit);
789 text_render_options_t tro = {10, PRESSURE_TEXT, xalign, yalign};
790 plot_text(gc, &tro, sec, mbar, "%d %s", pressure, unit);
793 static void plot_cylinder_pressure_text(struct graphics_context *gc, struct plot_info *pi)
797 int seen_cyl[MAX_CYLINDERS] = { FALSE, };
798 int last_pressure[MAX_CYLINDERS] = { 0, };
799 int last_time[MAX_CYLINDERS] = { 0, };
800 struct plot_data *entry;
802 if (!get_cylinder_pressure_range(gc, pi))
805 /* only loop over the actual events from the dive computer
806 * plus the second synthetic event at the start (to make sure
807 * we get "time=0" right)
808 * sadly with a recent change that first entry may no longer
809 * have any pressure reading - in that case just grab the
810 * pressure from the second entry */
811 if (GET_PRESSURE(pi->entry + 1) == 0 && GET_PRESSURE(pi->entry + 2) !=0)
812 INTERPOLATED_PRESSURE(pi->entry + 1) = GET_PRESSURE(pi->entry + 2);
813 for (i = 1; i < pi->nr; i++) {
814 entry = pi->entry + i;
816 if (!entry->same_cylinder) {
817 cyl = entry->cylinderindex;
818 if (!seen_cyl[cyl]) {
819 mbar = GET_PRESSURE(entry);
820 plot_pressure_value(gc, mbar, entry->sec, LEFT, BOTTOM);
821 seen_cyl[cyl] = TRUE;
824 /* remember the last pressure and time of
825 * the previous cylinder */
826 cyl = (entry - 1)->cylinderindex;
827 last_pressure[cyl] = GET_PRESSURE(entry - 1);
828 last_time[cyl] = (entry - 1)->sec;
832 cyl = entry->cylinderindex;
833 if (GET_PRESSURE(entry))
834 last_pressure[cyl] = GET_PRESSURE(entry);
835 last_time[cyl] = entry->sec;
837 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) {
838 if (last_time[cyl]) {
839 plot_pressure_value(gc, last_pressure[cyl], last_time[cyl], CENTER, TOP);
844 static void analyze_plot_info_minmax_minute(struct plot_data *entry, struct plot_data *first, struct plot_data *last, int index)
846 struct plot_data *p = entry;
847 int time = entry->sec;
848 int seconds = 90*(index+1);
849 struct plot_data *min, *max;
852 /* Go back 'seconds' in time */
854 if (p[-1].sec < time - seconds)
859 /* Then go forward until we hit an entry past the time */
864 int depth = p->depth;
865 if (p->sec > time + seconds)
869 if (depth < min->depth)
871 if (depth > max->depth)
874 entry->min[index] = min;
875 entry->max[index] = max;
876 entry->avg[index] = (avg + nr/2) / nr;
879 static void analyze_plot_info_minmax(struct plot_data *entry, struct plot_data *first, struct plot_data *last)
881 analyze_plot_info_minmax_minute(entry, first, last, 0);
882 analyze_plot_info_minmax_minute(entry, first, last, 1);
883 analyze_plot_info_minmax_minute(entry, first, last, 2);
886 static velocity_t velocity(int speed)
890 if (speed < -304) /* ascent faster than -60ft/min */
892 else if (speed < -152) /* above -30ft/min */
894 else if (speed < -76) /* -15ft/min */
896 else if (speed < -25) /* -5ft/min */
898 else if (speed < 25) /* very hard to find data, but it appears that the recommendations
899 for descent are usually about 2x ascent rate; still, we want
900 stable to mean stable */
902 else if (speed < 152) /* between 5 and 30ft/min is considered slow */
904 else if (speed < 304) /* up to 60ft/min is moderate */
906 else if (speed < 507) /* up to 100ft/min is fast */
908 else /* more than that is just crazy - you'll blow your ears out */
913 static struct plot_info *analyze_plot_info(struct plot_info *pi)
918 /* Do pressure min/max based on the non-surface data */
919 for (i = 0; i < nr; i++) {
920 struct plot_data *entry = pi->entry+i;
921 int pressure = GET_PRESSURE(entry);
922 int temperature = entry->temperature;
925 if (pressure > pi->maxpressure)
926 pi->maxpressure = pressure;
930 if (!pi->mintemp || temperature < pi->mintemp)
931 pi->mintemp = temperature;
932 if (temperature > pi->maxtemp)
933 pi->maxtemp = temperature;
937 /* Smoothing function: 5-point triangular smooth */
938 for (i = 2; i < nr; i++) {
939 struct plot_data *entry = pi->entry+i;
943 depth = entry[-2].depth + 2*entry[-1].depth + 3*entry[0].depth + 2*entry[1].depth + entry[2].depth;
944 entry->smoothed = (depth+4) / 9;
946 /* vertical velocity in mm/sec */
947 /* Linus wants to smooth this - let's at least look at the samples that aren't FAST or CRAZY */
948 if (entry[0].sec - entry[-1].sec) {
949 entry->velocity = velocity((entry[0].depth - entry[-1].depth) / (entry[0].sec - entry[-1].sec));
950 /* if our samples are short and we aren't too FAST*/
951 if (entry[0].sec - entry[-1].sec < 15 && entry->velocity < FAST) {
953 while (i+past > 0 && entry[0].sec - entry[past].sec < 15)
955 entry->velocity = velocity((entry[0].depth - entry[past].depth) /
956 (entry[0].sec - entry[past].sec));
959 entry->velocity = STABLE;
962 /* One-, two- and three-minute minmax data */
963 for (i = 0; i < nr; i++) {
964 struct plot_data *entry = pi->entry +i;
965 analyze_plot_info_minmax(entry, pi->entry, pi->entry+nr);
972 * simple structure to track the beginning and end tank pressure as
973 * well as the integral of depth over time spent while we have no
974 * pressure reading from the tank */
975 typedef struct pr_track_struct pr_track_t;
976 struct pr_track_struct {
981 double pressure_time;
985 static pr_track_t *pr_track_alloc(int start, int t_start) {
986 pr_track_t *pt = malloc(sizeof(pr_track_t));
988 pt->t_start = t_start;
991 pt->pressure_time = 0.0;
996 /* poor man's linked list */
997 static pr_track_t *list_last(pr_track_t *list)
999 pr_track_t *tail = list;
1002 while (tail->next) {
1008 static pr_track_t *list_add(pr_track_t *list, pr_track_t *element)
1010 pr_track_t *tail = list_last(list);
1013 tail->next = element;
1017 static void list_free(pr_track_t *list)
1021 list_free(list->next);
1025 static void dump_pr_track(pr_track_t **track_pr)
1030 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) {
1031 list = track_pr[cyl];
1033 printf("cyl%d: start %d end %d t_start %d t_end %d pt %6.3f\n", cyl,
1034 list->start, list->end, list->t_start, list->t_end, list->pressure_time);
1040 static void fill_missing_tank_pressures(struct plot_info *pi, pr_track_t **track_pr)
1042 pr_track_t *list = NULL;
1043 pr_track_t *nlist = NULL;
1046 struct plot_data *entry;
1047 int cur_pr[MAX_CYLINDERS];
1050 /* another great debugging tool */
1051 dump_pr_track(track_pr);
1053 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) {
1054 cur_pr[cyl] = track_pr[cyl]->start;
1057 /* The first two are "fillers", but in case we don't have a sample
1058 * at time 0 we need to process the second of them here */
1059 for (i = 1; i < pi->nr; i++) {
1060 entry = pi->entry + i;
1061 if (SENSOR_PRESSURE(entry)) {
1062 cur_pr[entry->cylinderindex] = SENSOR_PRESSURE(entry);
1064 if(!list || list->t_end < entry->sec) {
1065 nlist = track_pr[entry->cylinderindex];
1067 while (nlist && nlist->t_start <= entry->sec) {
1071 /* there may be multiple segments - so
1072 * let's assemble the length */
1074 pt = list->pressure_time;
1075 while (!nlist->end) {
1076 nlist = nlist->next;
1078 /* oops - we have no end pressure,
1079 * so this means this is a tank without
1080 * gas consumption information */
1083 pt += nlist->pressure_time;
1086 /* just continue without calculating
1087 * interpolated values */
1088 INTERPOLATED_PRESSURE(entry) = cur_pr[entry->cylinderindex];
1092 magic = (nlist->end - cur_pr[entry->cylinderindex]) / pt;
1095 double cur_pt = (entry->sec - (entry-1)->sec) *
1096 (1 + (entry->depth + (entry-1)->depth) / 20000.0);
1097 INTERPOLATED_PRESSURE(entry) =
1098 cur_pr[entry->cylinderindex] + cur_pt * magic + 0.5;
1099 cur_pr[entry->cylinderindex] = INTERPOLATED_PRESSURE(entry);
1101 INTERPOLATED_PRESSURE(entry) = cur_pr[entry->cylinderindex];
1106 static int get_cylinder_index(struct dive *dive, struct event *ev)
1111 * Try to find a cylinder that matches the O2 percentage
1112 * in the gas change event 'value' field.
1114 * Crazy suunto gas change events. We really should do
1115 * this in libdivecomputer or something.
1117 for (i = 0; i < MAX_CYLINDERS; i++) {
1118 cylinder_t *cyl = dive->cylinder+i;
1119 int o2 = (cyl->gasmix.o2.permille + 5) / 10;
1120 if (o2 == ev->value)
1127 static struct event *get_next_gaschange(struct event *event)
1130 if (!strcmp(event->name, "gaschange"))
1132 event = event->next;
1137 static int set_cylinder_index(struct plot_info *pi, int i, int cylinderindex, unsigned int end)
1139 while (i < pi->nr) {
1140 struct plot_data *entry = pi->entry+i;
1141 if (entry->sec > end)
1143 if (entry->cylinderindex != cylinderindex) {
1144 entry->cylinderindex = cylinderindex;
1145 entry->pressure[0] = 0;
1152 static void check_gas_change_events(struct dive *dive, struct plot_info *pi)
1154 int i = 0, cylinderindex = 0;
1155 struct event *ev = get_next_gaschange(dive->events);
1161 i = set_cylinder_index(pi, i, cylinderindex, ev->time.seconds);
1162 cylinderindex = get_cylinder_index(dive, ev);
1163 ev = get_next_gaschange(ev->next);
1165 set_cylinder_index(pi, i, cylinderindex, ~0u);
1168 /* for computers that track gas changes through events */
1169 static int count_gas_change_events(struct dive *dive)
1172 struct event *ev = get_next_gaschange(dive->events);
1176 ev = get_next_gaschange(ev->next);
1182 * Create a plot-info with smoothing and ranged min/max
1184 * This also makes sure that we have extra empty events on both
1185 * sides, so that you can do end-points without having to worry
1188 static struct plot_info *create_plot_info(struct dive *dive, int nr_samples, struct sample *dive_sample)
1190 int cylinderindex = -1;
1191 int lastdepth, lastindex;
1192 int i, pi_idx, nr, sec, cyl;
1194 struct plot_info *pi;
1195 pr_track_t *track_pr[MAX_CYLINDERS] = {NULL, };
1196 pr_track_t *pr_track, *current;
1197 gboolean missing_pr = FALSE;
1198 struct plot_data *entry = NULL;
1201 /* we want to potentially add synthetic plot_info elements for the gas changes */
1202 nr = nr_samples + 4 + 2 * count_gas_change_events(dive);
1203 alloc_size = plot_info_size(nr);
1204 pi = malloc(alloc_size);
1207 memset(pi, 0, alloc_size);
1209 pi_idx = 2; /* the two extra events at the start */
1210 /* check for gas changes before the samples start */
1211 ev = get_next_gaschange(dive->events);
1212 while (ev && ev->time.seconds < dive_sample->time.seconds) {
1213 entry = pi->entry + pi_idx;
1214 entry->sec = ev->time.seconds;
1215 entry->depth = 0; /* is that always correct ? */
1217 ev = get_next_gaschange(ev->next);
1219 if (ev && ev->time.seconds == dive_sample->time.seconds) {
1220 /* we already have a sample at the time of the event */
1221 ev = get_next_gaschange(ev->next);
1226 for (i = 0; i < nr_samples; i++) {
1229 struct sample *sample = dive_sample+i;
1231 entry = pi->entry + i + pi_idx;
1232 while (ev && ev->time.seconds < sample->time.seconds) {
1233 /* insert two fake plot info structures for the end of
1234 * the old tank and the start of the new tank */
1235 if (ev->time.seconds == sample->time.seconds - 1) {
1236 entry->sec = ev->time.seconds - 1;
1237 (entry+1)->sec = ev->time.seconds;
1239 entry->sec = ev->time.seconds;
1240 (entry+1)->sec = ev->time.seconds + 1;
1242 /* we need a fake depth - let's interpolate */
1244 entry->depth = sample->depth.mm -
1245 (sample->depth.mm - (sample-1)->depth.mm) / 2;
1247 entry->depth = sample->depth.mm;
1248 (entry+1)->depth = entry->depth;
1250 entry = pi->entry + i + pi_idx;
1251 ev = get_next_gaschange(ev->next);
1253 if (ev && ev->time.seconds == sample->time.seconds) {
1254 /* we already have a sample at the time of the event
1255 * just add a new one for the old tank and delay the
1256 * real even by one second (to keep time monotonous) */
1257 entry->sec = ev->time.seconds;
1258 entry->depth = sample->depth.mm;
1260 entry = pi->entry + i + pi_idx;
1261 ev = get_next_gaschange(ev->next);
1264 sec = entry->sec = sample->time.seconds + delay;
1265 depth = entry->depth = sample->depth.mm;
1266 entry->cylinderindex = sample->cylinderindex;
1267 SENSOR_PRESSURE(entry) = sample->cylinderpressure.mbar;
1268 entry->temperature = sample->temperature.mkelvin;
1270 if (depth || lastdepth)
1271 lastindex = i + pi_idx;
1274 if (depth > pi->maxdepth)
1275 pi->maxdepth = depth;
1277 entry = pi->entry + i + pi_idx;
1278 /* are there still unprocessed gas changes? that would be very strange */
1280 entry->sec = ev->time.seconds;
1281 entry->depth = 0; /* why are there gas changes after the dive is over? */
1283 entry = pi->entry + i + pi_idx;
1284 ev = get_next_gaschange(ev->next);
1286 nr = nr_samples + pi_idx - 2;
1287 check_gas_change_events(dive, pi);
1289 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) /* initialize the start pressures */
1290 track_pr[cyl] = pr_track_alloc(dive->cylinder[cyl].start.mbar, -1);
1291 current = track_pr[pi->entry[2].cylinderindex];
1292 for (i = 0; i < nr + 1; i++) {
1293 entry = pi->entry + i + 1;
1295 entry->same_cylinder = entry->cylinderindex == cylinderindex;
1296 cylinderindex = entry->cylinderindex;
1298 /* track the segments per cylinder and their pressure/time integral */
1299 if (!entry->same_cylinder) {
1300 current->end = SENSOR_PRESSURE(entry-1);
1301 current->t_end = (entry-1)->sec;
1302 current = pr_track_alloc(SENSOR_PRESSURE(entry), entry->sec);
1303 track_pr[cylinderindex] = list_add(track_pr[cylinderindex], current);
1304 } else { /* same cylinder */
1305 if ((!SENSOR_PRESSURE(entry) && SENSOR_PRESSURE(entry-1)) ||
1306 (SENSOR_PRESSURE(entry) && !SENSOR_PRESSURE(entry-1))) {
1307 /* transmitter changed its working status */
1308 current->end = SENSOR_PRESSURE(entry-1);
1309 current->t_end = (entry-1)->sec;
1310 current = pr_track_alloc(SENSOR_PRESSURE(entry), entry->sec);
1311 track_pr[cylinderindex] =
1312 list_add(track_pr[cylinderindex], current);
1315 /* finally, do the discrete integration to get the SAC rate equivalent */
1316 current->pressure_time += (entry->sec - (entry-1)->sec) *
1317 (1 + (entry->depth + (entry-1)->depth) / 20000.0);
1318 missing_pr |= !SENSOR_PRESSURE(entry);
1322 current->t_end = entry->sec;
1324 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) { /* initialize the end pressures */
1325 int pr = dive->cylinder[cyl].end.mbar;
1326 if (pr && track_pr[cyl]) {
1327 pr_track = list_last(track_pr[cyl]);
1331 /* Fill in the last two entries with empty values but valid times
1332 * without creating a false cylinder change event */
1334 pi->entry[i].sec = sec + 20;
1335 pi->entry[i].same_cylinder = 1;
1336 pi->entry[i].cylinderindex = pi->entry[i-1].cylinderindex;
1337 INTERPOLATED_PRESSURE(pi->entry + i) = GET_PRESSURE(pi->entry + i - 1);
1338 pi->entry[i+1].sec = sec + 40;
1339 pi->entry[i+1].same_cylinder = 1;
1340 pi->entry[i+1].cylinderindex = pi->entry[i-1].cylinderindex;
1341 INTERPOLATED_PRESSURE(pi->entry + i + 1) = GET_PRESSURE(pi->entry + i - 1);
1342 /* the number of actual entries - some computers have lots of
1343 * depth 0 samples at the end of a dive, we want to make sure
1344 * we have exactly one of them at the end */
1345 pi->nr = lastindex+1;
1346 while (pi->nr <= i+2 && pi->entry[pi->nr-1].depth > 0)
1348 pi->maxtime = pi->entry[lastindex].sec;
1350 /* Analyze_plot_info() will do the sample max pressures,
1351 * this handles the manual pressures
1353 pi->maxpressure = 0;
1354 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) {
1355 unsigned int mbar = dive->cylinder[cyl].start.mbar;
1356 if (mbar > pi->maxpressure)
1357 pi->maxpressure = mbar;
1360 pi->meandepth = dive->meandepth.mm;
1363 fill_missing_tank_pressures(pi, track_pr);
1365 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++)
1366 list_free(track_pr[cyl]);
1367 if (0) /* awesome for debugging - not useful otherwise */
1369 return analyze_plot_info(pi);
1372 void plot(struct graphics_context *gc, cairo_rectangle_int_t *drawing_area, struct dive *dive)
1374 struct plot_info *pi;
1375 static struct sample fake[4];
1376 struct sample *sample = dive->sample;
1377 int nr = dive->samples;
1380 int duration = dive->duration.seconds;
1381 int maxdepth = dive->maxdepth.mm;
1383 fake[1].time.seconds = duration * 0.05;
1384 fake[1].depth.mm = maxdepth;
1385 fake[2].time.seconds = duration * 0.95;
1386 fake[2].depth.mm = maxdepth;
1387 fake[3].time.seconds = duration * 1.00;
1391 pi = create_plot_info(dive, nr, sample);
1393 cairo_translate(gc->cr, drawing_area->x, drawing_area->y);
1394 cairo_set_line_width(gc->cr, 1);
1395 cairo_set_line_cap(gc->cr, CAIRO_LINE_CAP_ROUND);
1396 cairo_set_line_join(gc->cr, CAIRO_LINE_JOIN_ROUND);
1399 * We can use "cairo_translate()" because that doesn't
1400 * scale line width etc. But the actual scaling we need
1401 * do set up ourselves..
1403 * Snif. What a pity.
1405 gc->maxx = (drawing_area->width - 2*drawing_area->x);
1406 gc->maxy = (drawing_area->height - 2*drawing_area->y);
1409 plot_depth_profile(gc, pi);
1410 plot_events(gc, pi, dive);
1412 /* Temperature profile */
1413 plot_temperature_profile(gc, pi);
1415 /* Cylinder pressure plot */
1416 plot_cylinder_pressure(gc, pi, dive);
1418 /* Text on top of all graphs.. */
1419 plot_temperature_text(gc, pi);
1420 plot_depth_text(gc, pi);
1421 plot_cylinder_pressure_text(gc, pi);
1423 /* Bounding box last */
1424 gc->leftx = 0; gc->rightx = 1.0;
1425 gc->topy = 0; gc->bottomy = 1.0;
1427 set_source_rgba(gc, BOUNDING_BOX);
1428 cairo_set_line_width(gc->cr, 1);
1433 cairo_close_path(gc->cr);
1434 cairo_stroke(gc->cr);