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 * we also need to add 180 seconds at the end so the min/max
187 static int get_maxtime(struct plot_info *pi)
189 int seconds = pi->maxtime;
190 /* min 30 minutes, rounded up to 5 minutes, with at least 2.5 minutes to spare */
191 return MAX(30*60, ROUND_UP(seconds+150, 60*5));
194 static int get_maxdepth(struct plot_info *pi)
196 unsigned mm = pi->maxdepth;
197 /* Minimum 30m, rounded up to 10m, with at least 3m to spare */
198 return MAX(30000, ROUND_UP(mm+3000, 10000));
203 color_indice_t color;
205 } text_render_options_t;
208 #define CENTER (-0.5)
215 static void plot_text(struct graphics_context *gc, const text_render_options_t *tro,
216 double x, double y, const char *fmt, ...)
218 cairo_t *cr = gc->cr;
219 cairo_font_extents_t fe;
220 cairo_text_extents_t extents;
226 vsnprintf(buffer, sizeof(buffer), fmt, args);
229 cairo_set_font_size(cr, tro->size);
230 cairo_font_extents(cr, &fe);
231 cairo_text_extents(cr, buffer, &extents);
232 dx = tro->hpos * extents.width + extents.x_bearing;
233 dy = tro->vpos * extents.height + fe.descent;
236 cairo_rel_move_to(cr, dx, dy);
238 cairo_text_path(cr, buffer);
239 set_source_rgba(gc, TEXT_BACKGROUND);
243 cairo_rel_move_to(cr, dx, dy);
245 set_source_rgba(gc, tro->color);
246 cairo_show_text(cr, buffer);
253 static struct ev_select *ev_namelist;
254 static int evn_allocated;
257 void evn_foreach(void (*callback)(const char *, int *, void *), void *data)
261 for (i = 0; i < evn_used; i++) {
262 callback(ev_namelist[i].ev_name, &ev_namelist[i].plot_ev, data);
266 void remember_event(const char *eventname)
270 if (!eventname || (len = strlen(eventname)) == 0)
272 while (i < evn_used) {
273 if (!strncmp(eventname,ev_namelist[i].ev_name,len))
277 if (evn_used == evn_allocated) {
279 ev_namelist = realloc(ev_namelist, evn_allocated * sizeof(struct ev_select));
281 /* we are screwed, but let's just bail out */
284 ev_namelist[evn_used].ev_name = strdup(eventname);
285 ev_namelist[evn_used].plot_ev = TRUE;
289 static void plot_one_event(struct graphics_context *gc, struct plot_info *pi, struct event *event, const text_render_options_t *tro)
294 /* is plotting this event disabled? */
296 for (i = 0; i < evn_used; i++) {
297 if (! strcmp(event->name, ev_namelist[i].ev_name)) {
298 if (ev_namelist[i].plot_ev)
305 for (i = 0; i < pi->nr; i++) {
306 struct plot_data *data = pi->entry + i;
307 if (event->time.seconds < data->sec)
311 /* draw a little tirangular marker and attach tooltip */
312 x = SCALEX(gc, event->time.seconds);
313 y = SCALEY(gc, depth);
314 set_source_rgba(gc, ALERT_BG);
315 cairo_move_to(gc->cr, x-15, y+6);
316 cairo_line_to(gc->cr, x-3 , y+6);
317 cairo_line_to(gc->cr, x-9, y-6);
318 cairo_line_to(gc->cr, x-15, y+6);
319 cairo_stroke_preserve(gc->cr);
321 set_source_rgba(gc, ALERT_FG);
322 cairo_move_to(gc->cr, x-9, y-3);
323 cairo_line_to(gc->cr, x-9, y+1);
324 cairo_move_to(gc->cr, x-9, y+4);
325 cairo_line_to(gc->cr, x-9, y+4);
326 cairo_stroke(gc->cr);
327 attach_tooltip(x-15, y-6, 12, 12, event->name);
330 static void plot_events(struct graphics_context *gc, struct plot_info *pi, struct dive *dive)
332 static const text_render_options_t tro = {14, EVENTS, CENTER, TOP};
333 struct event *event = dive->events;
339 plot_one_event(gc, pi, event, &tro);
344 static void render_depth_sample(struct graphics_context *gc, struct plot_data *entry, const text_render_options_t *tro)
346 int sec = entry->sec, decimals;
349 d = get_depth_units(entry->depth, &decimals, NULL);
351 plot_text(gc, tro, sec, entry->depth, "%.*f", decimals, d);
354 static void plot_text_samples(struct graphics_context *gc, struct plot_info *pi)
356 static const text_render_options_t deep = {14, SAMPLE_DEEP, CENTER, TOP};
357 static const text_render_options_t shallow = {14, SAMPLE_SHALLOW, CENTER, BOTTOM};
361 for (i = 0; i < pi->nr; i++) {
362 struct plot_data *entry = pi->entry + i;
364 if (entry->depth < 2000)
367 if ((entry == entry->max[2]) && entry->depth != last) {
368 render_depth_sample(gc, entry, &deep);
372 if ((entry == entry->min[2]) && entry->depth != last) {
373 render_depth_sample(gc, entry, &shallow);
377 if (entry->depth != last)
382 static void plot_depth_text(struct graphics_context *gc, struct plot_info *pi)
384 int maxtime, maxdepth;
386 /* Get plot scaling limits */
387 maxtime = get_maxtime(pi);
388 maxdepth = get_maxdepth(pi);
390 gc->leftx = 0; gc->rightx = maxtime;
391 gc->topy = 0; gc->bottomy = maxdepth;
393 plot_text_samples(gc, pi);
396 static void plot_smoothed_profile(struct graphics_context *gc, struct plot_info *pi)
399 struct plot_data *entry = pi->entry;
401 set_source_rgba(gc, SMOOTHED);
402 move_to(gc, entry->sec, entry->smoothed);
403 for (i = 1; i < pi->nr; i++) {
405 line_to(gc, entry->sec, entry->smoothed);
407 cairo_stroke(gc->cr);
410 static void plot_minmax_profile_minute(struct graphics_context *gc, struct plot_info *pi,
414 struct plot_data *entry = pi->entry;
416 set_source_rgba(gc, MINUTE);
417 move_to(gc, entry->sec, entry->min[index]->depth);
418 for (i = 1; i < pi->nr; i++) {
420 line_to(gc, entry->sec, entry->min[index]->depth);
422 for (i = 1; i < pi->nr; i++) {
423 line_to(gc, entry->sec, entry->max[index]->depth);
426 cairo_close_path(gc->cr);
430 static void plot_minmax_profile(struct graphics_context *gc, struct plot_info *pi)
434 plot_minmax_profile_minute(gc, pi, 2);
435 plot_minmax_profile_minute(gc, pi, 1);
436 plot_minmax_profile_minute(gc, pi, 0);
439 static void plot_depth_profile(struct graphics_context *gc, struct plot_info *pi)
442 cairo_t *cr = gc->cr;
444 struct plot_data *entry;
445 int maxtime, maxdepth, marker;
446 int increments[4] = { 5*60, 10*60, 15*60, 30*60 };
448 /* Get plot scaling limits */
449 maxtime = get_maxtime(pi);
450 maxdepth = get_maxdepth(pi);
452 /* Time markers: at most every 5 min, but no more than 12 markers
453 * and for convenience we do 5, 10, 15 or 30 min intervals.
454 * This allows for 6h dives - enough (I hope) for even the craziest
455 * divers - but just in case, for those 8h depth-record-breaking dives,
456 * we double the interval if this still doesn't get us to 12 or fewer
459 while (maxtime / increments[i] > 12 && i < 4)
461 incr = increments[i];
462 while (maxtime / incr > 12)
465 gc->leftx = 0; gc->rightx = maxtime;
466 gc->topy = 0; gc->bottomy = 1.0;
467 set_source_rgba(gc, TIME_GRID);
468 cairo_set_line_width(gc->cr, 2);
470 for (i = incr; i < maxtime; i += incr) {
476 /* now the text on every second time marker */
477 text_render_options_t tro = {10, TIME_TEXT, CENTER, TOP};
478 for (i = incr; i < maxtime; i += 2 * incr)
479 plot_text(gc, &tro, i, 1, "%d", i/60);
481 /* Depth markers: every 30 ft or 10 m*/
482 gc->leftx = 0; gc->rightx = 1.0;
483 gc->topy = 0; gc->bottomy = maxdepth;
484 switch (output_units.length) {
485 case METERS: marker = 10000; break;
486 case FEET: marker = 9144; break; /* 30 ft */
489 set_source_rgba(gc, DEPTH_GRID);
490 for (i = marker; i < maxdepth; i += marker) {
496 /* Show mean depth */
498 set_source_rgba(gc, MEAN_DEPTH);
499 move_to(gc, 0, pi->meandepth);
500 line_to(gc, 1, pi->meandepth);
504 gc->leftx = 0; gc->rightx = maxtime;
507 * These are good for debugging text placement etc,
508 * but not for actual display..
511 plot_smoothed_profile(gc, pi);
512 plot_minmax_profile(gc, pi);
515 /* Do the depth profile for the neat fill */
516 gc->topy = 0; gc->bottomy = maxdepth;
518 cairo_pattern_t *pat;
519 pat = cairo_pattern_create_linear (0.0, 0.0, 0.0, 256.0);
520 pattern_add_color_stop_rgba (gc, pat, 1, DEPTH_BOTTOM);
521 pattern_add_color_stop_rgba (gc, pat, 0, DEPTH_TOP);
523 cairo_set_source(gc->cr, pat);
524 cairo_pattern_destroy(pat);
525 cairo_set_line_width(gc->cr, 2);
529 for (i = 0; i < pi->nr; i++, entry++)
530 line_to(gc, entry->sec, entry->depth);
531 cairo_close_path(gc->cr);
535 /* Now do it again for the velocity colors */
537 for (i = 1; i < pi->nr; i++) {
540 /* we want to draw the segments in different colors
541 * representing the vertical velocity, so we need to
542 * chop this into short segments */
543 depth = entry->depth;
544 set_source_rgba(gc, VELOCITY_COLORS_START_IDX + entry->velocity);
545 move_to(gc, entry[-1].sec, entry[-1].depth);
546 line_to(gc, sec, depth);
551 static int setup_temperature_limits(struct graphics_context *gc, struct plot_info *pi)
553 int maxtime, mintemp, maxtemp, delta;
555 /* Get plot scaling limits */
556 maxtime = get_maxtime(pi);
557 mintemp = pi->mintemp;
558 maxtemp = pi->maxtemp;
560 gc->leftx = 0; gc->rightx = maxtime;
561 /* Show temperatures in roughly the lower third, but make sure the scale
562 is at least somewhat reasonable */
563 delta = maxtemp - mintemp;
564 if (delta > 3000) { /* more than 3K in fluctuation */
565 gc->topy = maxtemp + delta*2;
566 gc->bottomy = mintemp - delta/2;
568 gc->topy = maxtemp + 1500 + delta*2;
569 gc->bottomy = mintemp - delta/2;
572 return maxtemp > mintemp;
575 static void plot_single_temp_text(struct graphics_context *gc, int sec, int mkelvin)
579 static const text_render_options_t tro = {12, TEMP_TEXT, LEFT, TOP};
581 deg = get_temp_units(mkelvin, &unit);
583 plot_text(gc, &tro, sec, mkelvin, "%d%s", (int)(deg + 0.5), unit);
586 static void plot_temperature_text(struct graphics_context *gc, struct plot_info *pi)
589 int last = -300, sec = 0;
590 int last_temperature = 0, last_printed_temp = 0;
592 if (!setup_temperature_limits(gc, pi))
595 for (i = 0; i < pi->nr; i++) {
596 struct plot_data *entry = pi->entry+i;
597 int mkelvin = entry->temperature;
601 last_temperature = mkelvin;
603 /* don't print a temperature
604 * if it's been less than 5min and less than a 2K change OR
605 * if it's been less than 2min OR if the change from the
606 * last print is less than .4K (and therefore less than 1F */
607 if (((sec < last + 300) && (abs(mkelvin - last_printed_temp) < 2000)) ||
608 (sec < last + 120) ||
609 (abs(mkelvin - last_printed_temp) < 400))
612 plot_single_temp_text(gc,sec,mkelvin);
613 last_printed_temp = mkelvin;
615 /* it would be nice to print the end temperature, if it's
616 * different or if the last temperature print has been more
617 * than a quarter of the dive back */
618 if ((abs(last_temperature - last_printed_temp) > 500) ||
619 ((double)last / (double)sec < 0.75))
620 plot_single_temp_text(gc, sec, last_temperature);
623 static void plot_temperature_profile(struct graphics_context *gc, struct plot_info *pi)
626 cairo_t *cr = gc->cr;
629 if (!setup_temperature_limits(gc, pi))
632 cairo_set_line_width(gc->cr, 2);
633 set_source_rgba(gc, TEMP_PLOT);
634 for (i = 0; i < pi->nr; i++) {
635 struct plot_data *entry = pi->entry + i;
636 int mkelvin = entry->temperature;
637 int sec = entry->sec;
644 line_to(gc, sec, mkelvin);
646 move_to(gc, sec, mkelvin);
652 /* gets both the actual start and end pressure as well as the scaling factors */
653 static int get_cylinder_pressure_range(struct graphics_context *gc, struct plot_info *pi)
656 gc->rightx = get_maxtime(pi);
658 gc->bottomy = 0; gc->topy = pi->maxpressure * 1.5;
659 return pi->maxpressure != 0;
662 /* set the color for the pressure plot according to temporary sac rate
663 * as compared to avg_sac; the calculation simply maps the delta between
664 * sac and avg_sac to indexes 0 .. (SAC_COLORS - 1) with everything
665 * more than 6000 ml/min below avg_sac mapped to 0 */
667 static void set_sac_color(struct graphics_context *gc, int sac, int avg_sac)
670 int delta = sac - avg_sac + 7000;
673 sac_index = delta / 2000;
676 if (sac_index > SAC_COLORS - 1)
677 sac_index = SAC_COLORS - 1;
678 set_source_rgba(gc, SAC_COLORS_START_IDX + sac_index);
680 set_source_rgba(gc, SAC_DEFAULT);
684 /* calculate the current SAC in ml/min and convert to int */
685 #define GET_LOCAL_SAC(_entry1, _entry2, _dive) (int) \
686 ((GET_PRESSURE((_entry1)) - GET_PRESSURE((_entry2))) * \
687 (_dive)->cylinder[(_entry1)->cylinderindex].type.size.mliter / \
688 (((_entry2)->sec - (_entry1)->sec) / 60.0) / \
689 (1 + ((_entry1)->depth + (_entry2)->depth) / 20000.0) / \
692 #define SAC_WINDOW 45 /* sliding window in seconds for current SAC calculation */
694 static void plot_cylinder_pressure(struct graphics_context *gc, struct plot_info *pi,
699 int lift_pen = FALSE;
700 int first_plot = TRUE;
702 struct plot_data *last_entry = NULL;
704 if (!get_cylinder_pressure_range(gc, pi))
707 cairo_set_line_width(gc->cr, 2);
709 for (i = 0; i < pi->nr; i++) {
711 struct plot_data *entry = pi->entry + i;
713 mbar = GET_PRESSURE(entry);
714 if (!entry->same_cylinder) {
725 sac = GET_LOCAL_SAC(entry, pi->entry + i + 1, dive);
729 for (j = last; j < i; j++)
730 sac += GET_LOCAL_SAC(pi->entry + j, pi->entry + j + 1, dive);
732 if (entry->sec - last_entry->sec >= SAC_WINDOW) {
734 last_entry = pi->entry + last;
737 set_sac_color(gc, sac, dive->sac);
739 if (!first_plot && entry->same_cylinder) {
740 /* if we have a previous event from the same tank,
741 * draw at least a short line */
743 prev_pr = GET_PRESSURE(entry - 1);
744 move_to(gc, (entry-1)->sec, prev_pr);
745 line_to(gc, entry->sec, mbar);
748 move_to(gc, entry->sec, mbar);
752 line_to(gc, entry->sec, mbar);
754 cairo_stroke(gc->cr);
755 move_to(gc, entry->sec, mbar);
759 static void plot_pressure_value(struct graphics_context *gc, int mbar, int sec,
760 int xalign, int yalign)
765 pressure = get_pressure_units(mbar, &unit);
766 text_render_options_t tro = {10, PRESSURE_TEXT, xalign, yalign};
767 plot_text(gc, &tro, sec, mbar, "%d %s", pressure, unit);
770 static void plot_cylinder_pressure_text(struct graphics_context *gc, struct plot_info *pi)
774 int seen_cyl[MAX_CYLINDERS] = { FALSE, };
775 int last_pressure[MAX_CYLINDERS] = { 0, };
776 int last_time[MAX_CYLINDERS] = { 0, };
777 struct plot_data *entry;
779 if (!get_cylinder_pressure_range(gc, pi))
782 /* only loop over the actual events from the dive computer
783 * plus the second synthetic event at the start (to make sure
784 * we get "time=0" right)
785 * sadly with a recent change that first entry may no longer
786 * have any pressure reading - in that case just grab the
787 * pressure from the second entry */
788 if (GET_PRESSURE(pi->entry + 1) == 0 && GET_PRESSURE(pi->entry + 2) !=0)
789 INTERPOLATED_PRESSURE(pi->entry + 1) = GET_PRESSURE(pi->entry + 2);
790 for (i = 1; i < pi->nr; i++) {
791 entry = pi->entry + i;
793 if (!entry->same_cylinder) {
794 cyl = entry->cylinderindex;
795 if (!seen_cyl[cyl]) {
796 mbar = GET_PRESSURE(entry);
797 plot_pressure_value(gc, mbar, entry->sec, LEFT, BOTTOM);
798 seen_cyl[cyl] = TRUE;
801 /* remember the last pressure and time of
802 * the previous cylinder */
803 cyl = (entry - 1)->cylinderindex;
804 last_pressure[cyl] = GET_PRESSURE(entry - 1);
805 last_time[cyl] = (entry - 1)->sec;
809 cyl = entry->cylinderindex;
810 if (GET_PRESSURE(entry))
811 last_pressure[cyl] = GET_PRESSURE(entry);
812 last_time[cyl] = entry->sec;
814 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) {
815 if (last_time[cyl]) {
816 plot_pressure_value(gc, last_pressure[cyl], last_time[cyl], CENTER, TOP);
821 static void analyze_plot_info_minmax_minute(struct plot_data *entry, struct plot_data *first, struct plot_data *last, int index)
823 struct plot_data *p = entry;
824 int time = entry->sec;
825 int seconds = 90*(index+1);
826 struct plot_data *min, *max;
829 /* Go back 'seconds' in time */
831 if (p[-1].sec < time - seconds)
836 /* Then go forward until we hit an entry past the time */
841 int depth = p->depth;
842 if (p->sec > time + seconds)
846 if (depth < min->depth)
848 if (depth > max->depth)
851 entry->min[index] = min;
852 entry->max[index] = max;
853 entry->avg[index] = (avg + nr/2) / nr;
856 static void analyze_plot_info_minmax(struct plot_data *entry, struct plot_data *first, struct plot_data *last)
858 analyze_plot_info_minmax_minute(entry, first, last, 0);
859 analyze_plot_info_minmax_minute(entry, first, last, 1);
860 analyze_plot_info_minmax_minute(entry, first, last, 2);
863 static velocity_t velocity(int speed)
867 if (speed < -304) /* ascent faster than -60ft/min */
869 else if (speed < -152) /* above -30ft/min */
871 else if (speed < -76) /* -15ft/min */
873 else if (speed < -25) /* -5ft/min */
875 else if (speed < 25) /* very hard to find data, but it appears that the recommendations
876 for descent are usually about 2x ascent rate; still, we want
877 stable to mean stable */
879 else if (speed < 152) /* between 5 and 30ft/min is considered slow */
881 else if (speed < 304) /* up to 60ft/min is moderate */
883 else if (speed < 507) /* up to 100ft/min is fast */
885 else /* more than that is just crazy - you'll blow your ears out */
890 static struct plot_info *analyze_plot_info(struct plot_info *pi)
895 /* Do pressure min/max based on the non-surface data */
896 for (i = 0; i < nr; i++) {
897 struct plot_data *entry = pi->entry+i;
898 int pressure = GET_PRESSURE(entry);
899 int temperature = entry->temperature;
902 if (pressure > pi->maxpressure)
903 pi->maxpressure = pressure;
907 if (!pi->mintemp || temperature < pi->mintemp)
908 pi->mintemp = temperature;
909 if (temperature > pi->maxtemp)
910 pi->maxtemp = temperature;
914 /* Smoothing function: 5-point triangular smooth */
915 for (i = 2; i < nr; i++) {
916 struct plot_data *entry = pi->entry+i;
920 depth = entry[-2].depth + 2*entry[-1].depth + 3*entry[0].depth + 2*entry[1].depth + entry[2].depth;
921 entry->smoothed = (depth+4) / 9;
923 /* vertical velocity in mm/sec */
924 /* Linus wants to smooth this - let's at least look at the samples that aren't FAST or CRAZY */
925 if (entry[0].sec - entry[-1].sec) {
926 entry->velocity = velocity((entry[0].depth - entry[-1].depth) / (entry[0].sec - entry[-1].sec));
927 /* if our samples are short and we aren't too FAST*/
928 if (entry[0].sec - entry[-1].sec < 15 && entry->velocity < FAST) {
930 while (i+past > 0 && entry[0].sec - entry[past].sec < 15)
932 entry->velocity = velocity((entry[0].depth - entry[past].depth) /
933 (entry[0].sec - entry[past].sec));
936 entry->velocity = STABLE;
939 /* One-, two- and three-minute minmax data */
940 for (i = 0; i < nr; i++) {
941 struct plot_data *entry = pi->entry +i;
942 analyze_plot_info_minmax(entry, pi->entry, pi->entry+nr);
949 * simple structure to track the beginning and end tank pressure as
950 * well as the integral of depth over time spent while we have no
951 * pressure reading from the tank */
952 typedef struct pr_track_struct pr_track_t;
953 struct pr_track_struct {
958 double pressure_time;
962 static pr_track_t *pr_track_alloc(int start, int t_start) {
963 pr_track_t *pt = malloc(sizeof(pr_track_t));
965 pt->t_start = t_start;
968 pt->pressure_time = 0.0;
973 /* poor man's linked list */
974 static pr_track_t *list_last(pr_track_t *list)
976 pr_track_t *tail = list;
985 static pr_track_t *list_add(pr_track_t *list, pr_track_t *element)
987 pr_track_t *tail = list_last(list);
990 tail->next = element;
994 static void list_free(pr_track_t *list)
998 list_free(list->next);
1002 static void dump_pr_track(pr_track_t **track_pr)
1007 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) {
1008 list = track_pr[cyl];
1010 printf("cyl%d: start %d end %d t_start %d t_end %d pt %6.3f\n", cyl,
1011 list->start, list->end, list->t_start, list->t_end, list->pressure_time);
1017 static void fill_missing_tank_pressures(struct dive *dive, struct plot_info *pi,
1018 pr_track_t **track_pr)
1020 pr_track_t *list = NULL;
1021 pr_track_t *nlist = NULL;
1024 struct plot_data *entry;
1025 int cur_pr[MAX_CYLINDERS];
1028 /* another great debugging tool */
1029 dump_pr_track(track_pr);
1031 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) {
1032 cur_pr[cyl] = track_pr[cyl]->start;
1035 /* The first two are "fillers", but in case we don't have a sample
1036 * at time 0 we need to process the second of them here */
1037 for (i = 1; i < pi->nr; i++) {
1038 entry = pi->entry + i;
1039 if (SENSOR_PRESSURE(entry)) {
1040 cur_pr[entry->cylinderindex] = SENSOR_PRESSURE(entry);
1042 if(!list || list->t_end < entry->sec) {
1043 nlist = track_pr[entry->cylinderindex];
1045 while (nlist && nlist->t_start <= entry->sec) {
1049 /* there may be multiple segments - so
1050 * let's assemble the length */
1052 pt = list->pressure_time;
1053 while (!nlist->end) {
1054 nlist = nlist->next;
1056 /* oops - we have no end pressure,
1057 * so this means this is a tank without
1058 * gas consumption information */
1061 pt += nlist->pressure_time;
1064 /* just continue without calculating
1065 * interpolated values */
1066 INTERPOLATED_PRESSURE(entry) = cur_pr[entry->cylinderindex];
1070 magic = (nlist->end - cur_pr[entry->cylinderindex]) / pt;
1073 double cur_pt = (entry->sec - (entry-1)->sec) *
1074 (1 + (entry->depth + (entry-1)->depth) / 20000.0);
1075 INTERPOLATED_PRESSURE(entry) =
1076 cur_pr[entry->cylinderindex] + cur_pt * magic + 0.5;
1077 cur_pr[entry->cylinderindex] = INTERPOLATED_PRESSURE(entry);
1079 INTERPOLATED_PRESSURE(entry) = cur_pr[entry->cylinderindex];
1084 static int get_cylinder_index(struct dive *dive, struct event *ev)
1089 * Try to find a cylinder that matches the O2 percentage
1090 * in the gas change event 'value' field.
1092 * Crazy suunto gas change events. We really should do
1093 * this in libdivecomputer or something.
1095 for (i = 0; i < MAX_CYLINDERS; i++) {
1096 cylinder_t *cyl = dive->cylinder+i;
1097 int o2 = (cyl->gasmix.o2.permille + 5) / 10;
1098 if (o2 == ev->value)
1105 static struct event *get_next_gaschange(struct event *event)
1108 if (!strcmp(event->name, "gaschange"))
1110 event = event->next;
1115 static int set_cylinder_index(struct plot_info *pi, int i, int cylinderindex, unsigned int end)
1117 while (i < pi->nr) {
1118 struct plot_data *entry = pi->entry+i;
1119 if (entry->sec > end)
1121 if (entry->cylinderindex != cylinderindex) {
1122 entry->cylinderindex = cylinderindex;
1123 entry->pressure[0] = 0;
1130 static void check_gas_change_events(struct dive *dive, struct plot_info *pi)
1132 int i = 0, cylinderindex = 0;
1133 struct event *ev = get_next_gaschange(dive->events);
1139 i = set_cylinder_index(pi, i, cylinderindex, ev->time.seconds);
1140 cylinderindex = get_cylinder_index(dive, ev);
1141 ev = get_next_gaschange(ev->next);
1143 set_cylinder_index(pi, i, cylinderindex, ~0u);
1146 /* for computers that track gas changes through events */
1147 static int count_gas_change_events(struct dive *dive)
1150 struct event *ev = get_next_gaschange(dive->events);
1154 ev = get_next_gaschange(ev->next);
1160 * Create a plot-info with smoothing and ranged min/max
1162 * This also makes sure that we have extra empty events on both
1163 * sides, so that you can do end-points without having to worry
1166 static struct plot_info *create_plot_info(struct dive *dive, int nr_samples, struct sample *dive_sample)
1168 int cylinderindex = -1;
1169 int lastdepth, lastindex;
1170 int i, pi_idx, nr, sec, cyl;
1172 struct plot_info *pi;
1173 pr_track_t *track_pr[MAX_CYLINDERS] = {NULL, };
1174 pr_track_t *pr_track, *current;
1175 gboolean missing_pr = FALSE;
1176 struct plot_data *entry = NULL;
1179 /* we want to potentially add synthetic plot_info elements for the gas changes */
1180 nr = nr_samples + 4 + 2 * count_gas_change_events(dive);
1181 alloc_size = plot_info_size(nr);
1182 pi = malloc(alloc_size);
1185 memset(pi, 0, alloc_size);
1187 pi_idx = 2; /* the two extra events at the start */
1188 /* check for gas changes before the samples start */
1189 ev = get_next_gaschange(dive->events);
1190 while (ev && ev->time.seconds < dive_sample->time.seconds) {
1191 entry = pi->entry + pi_idx;
1192 entry->sec = ev->time.seconds;
1193 entry->depth = 0; /* is that always correct ? */
1195 ev = get_next_gaschange(ev->next);
1197 if (ev && ev->time.seconds == dive_sample->time.seconds) {
1198 /* we already have a sample at the time of the event */
1199 ev = get_next_gaschange(ev->next);
1204 for (i = 0; i < nr_samples; i++) {
1207 struct sample *sample = dive_sample+i;
1209 entry = pi->entry + i + pi_idx;
1210 while (ev && ev->time.seconds < sample->time.seconds) {
1211 /* insert two fake plot info structures for the end of
1212 * the old tank and the start of the new tank */
1213 if (ev->time.seconds == sample->time.seconds - 1) {
1214 entry->sec = ev->time.seconds - 1;
1215 (entry+1)->sec = ev->time.seconds;
1217 entry->sec = ev->time.seconds;
1218 (entry+1)->sec = ev->time.seconds + 1;
1220 /* we need a fake depth - let's interpolate */
1222 entry->depth = sample->depth.mm -
1223 (sample->depth.mm - (sample-1)->depth.mm) / 2;
1225 entry->depth = sample->depth.mm;
1226 (entry+1)->depth = entry->depth;
1228 entry = pi->entry + i + pi_idx;
1229 ev = get_next_gaschange(ev->next);
1231 if (ev && ev->time.seconds == sample->time.seconds) {
1232 /* we already have a sample at the time of the event
1233 * just add a new one for the old tank and delay the
1234 * real even by one second (to keep time monotonous) */
1235 entry->sec = ev->time.seconds;
1236 entry->depth = sample->depth.mm;
1238 entry = pi->entry + i + pi_idx;
1239 ev = get_next_gaschange(ev->next);
1242 sec = entry->sec = sample->time.seconds + delay;
1243 depth = entry->depth = sample->depth.mm;
1244 entry->cylinderindex = sample->cylinderindex;
1245 SENSOR_PRESSURE(entry) = sample->cylinderpressure.mbar;
1246 entry->temperature = sample->temperature.mkelvin;
1248 if (depth || lastdepth)
1249 lastindex = i + pi_idx;
1252 if (depth > pi->maxdepth)
1253 pi->maxdepth = depth;
1255 entry = pi->entry + i + pi_idx;
1256 /* are there still unprocessed gas changes? that would be very strange */
1258 entry->sec = ev->time.seconds;
1259 entry->depth = 0; /* why are there gas changes after the dive is over? */
1261 entry = pi->entry + i + pi_idx;
1262 ev = get_next_gaschange(ev->next);
1264 nr = nr_samples + pi_idx - 2;
1265 check_gas_change_events(dive, pi);
1267 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) /* initialize the start pressures */
1268 track_pr[cyl] = pr_track_alloc(dive->cylinder[cyl].start.mbar, -1);
1269 current = track_pr[pi->entry[2].cylinderindex];
1270 for (i = 0; i < nr + 1; i++) {
1271 entry = pi->entry + i + 1;
1273 entry->same_cylinder = entry->cylinderindex == cylinderindex;
1274 cylinderindex = entry->cylinderindex;
1276 /* track the segments per cylinder and their pressure/time integral */
1277 if (!entry->same_cylinder) {
1278 current->end = SENSOR_PRESSURE(entry-1);
1279 current->t_end = (entry-1)->sec;
1280 current = pr_track_alloc(SENSOR_PRESSURE(entry), entry->sec);
1281 track_pr[cylinderindex] = list_add(track_pr[cylinderindex], current);
1282 } else { /* same cylinder */
1283 if ((!SENSOR_PRESSURE(entry) && SENSOR_PRESSURE(entry-1)) ||
1284 (SENSOR_PRESSURE(entry) && !SENSOR_PRESSURE(entry-1))) {
1285 /* transmitter changed its working status */
1286 current->end = SENSOR_PRESSURE(entry-1);
1287 current->t_end = (entry-1)->sec;
1288 current = pr_track_alloc(SENSOR_PRESSURE(entry), entry->sec);
1289 track_pr[cylinderindex] =
1290 list_add(track_pr[cylinderindex], current);
1293 /* finally, do the discrete integration to get the SAC rate equivalent */
1294 current->pressure_time += (entry->sec - (entry-1)->sec) *
1295 (1 + (entry->depth + (entry-1)->depth) / 20000.0);
1296 missing_pr |= !SENSOR_PRESSURE(entry);
1300 current->t_end = entry->sec;
1302 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) { /* initialize the end pressures */
1303 int pr = dive->cylinder[cyl].end.mbar;
1304 if (pr && track_pr[cyl]) {
1305 pr_track = list_last(track_pr[cyl]);
1309 /* Fill in the last two entries with empty values but valid times
1310 * without creating a false cylinder change event */
1312 pi->entry[i].sec = sec + 20;
1313 pi->entry[i].same_cylinder = 1;
1314 pi->entry[i].cylinderindex = pi->entry[i-1].cylinderindex;
1315 INTERPOLATED_PRESSURE(pi->entry + i) = GET_PRESSURE(pi->entry + i - 1);
1316 pi->entry[i+1].sec = sec + 40;
1317 pi->entry[i+1].same_cylinder = 1;
1318 pi->entry[i+1].cylinderindex = pi->entry[i-1].cylinderindex;
1319 INTERPOLATED_PRESSURE(pi->entry + i + 1) = GET_PRESSURE(pi->entry + i - 1);
1320 /* the number of actual entries - some computers have lots of
1321 * depth 0 samples at the end of a dive, we want to make sure
1322 * we have exactly one of them at the end */
1323 pi->nr = lastindex+1;
1324 while (pi->nr <= i+2 && pi->entry[pi->nr-1].depth > 0)
1326 pi->maxtime = pi->entry[lastindex].sec;
1328 /* Analyze_plot_info() will do the sample max pressures,
1329 * this handles the manual pressures
1331 pi->maxpressure = 0;
1332 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) {
1333 unsigned int mbar = dive->cylinder[cyl].start.mbar;
1334 if (mbar > pi->maxpressure)
1335 pi->maxpressure = mbar;
1338 pi->meandepth = dive->meandepth.mm;
1341 fill_missing_tank_pressures(dive, pi, track_pr);
1343 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++)
1344 list_free(track_pr[cyl]);
1345 if (0) /* awesome for debugging - not useful otherwise */
1347 return analyze_plot_info(pi);
1350 void plot(struct graphics_context *gc, cairo_rectangle_int_t *drawing_area, struct dive *dive)
1352 struct plot_info *pi;
1353 static struct sample fake[4];
1354 struct sample *sample = dive->sample;
1355 int nr = dive->samples;
1358 int duration = dive->duration.seconds;
1359 int maxdepth = dive->maxdepth.mm;
1361 fake[1].time.seconds = duration * 0.05;
1362 fake[1].depth.mm = maxdepth;
1363 fake[2].time.seconds = duration * 0.95;
1364 fake[2].depth.mm = maxdepth;
1365 fake[3].time.seconds = duration * 1.00;
1369 pi = create_plot_info(dive, nr, sample);
1371 cairo_translate(gc->cr, drawing_area->x, drawing_area->y);
1372 cairo_set_line_width(gc->cr, 1);
1373 cairo_set_line_cap(gc->cr, CAIRO_LINE_CAP_ROUND);
1374 cairo_set_line_join(gc->cr, CAIRO_LINE_JOIN_ROUND);
1377 * We can use "cairo_translate()" because that doesn't
1378 * scale line width etc. But the actual scaling we need
1379 * do set up ourselves..
1381 * Snif. What a pity.
1383 gc->maxx = (drawing_area->width - 2*drawing_area->x);
1384 gc->maxy = (drawing_area->height - 2*drawing_area->y);
1387 plot_depth_profile(gc, pi);
1388 plot_events(gc, pi, dive);
1390 /* Temperature profile */
1391 plot_temperature_profile(gc, pi);
1393 /* Cylinder pressure plot */
1394 plot_cylinder_pressure(gc, pi, dive);
1396 /* Text on top of all graphs.. */
1397 plot_temperature_text(gc, pi);
1398 plot_depth_text(gc, pi);
1399 plot_cylinder_pressure_text(gc, pi);
1401 /* Bounding box last */
1402 gc->leftx = 0; gc->rightx = 1.0;
1403 gc->topy = 0; gc->bottomy = 1.0;
1405 set_source_rgba(gc, BOUNDING_BOX);
1406 cairo_set_line_width(gc->cr, 1);
1411 cairo_close_path(gc->cr);
1412 cairo_stroke(gc->cr);