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 " 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].temperature, pi->entry[i].depth, pi->entry[i].smoothed);
179 * When showing dive profiles, we scale things to the
180 * current dive. However, we don't scale past less than
181 * 30 minutes or 90 ft, just so that small dives show
183 * we also need to add 180 seconds at the end so the min/max
186 static int get_maxtime(struct plot_info *pi)
188 int seconds = pi->maxtime;
189 /* min 30 minutes, rounded up to 5 minutes, with at least 2.5 minutes to spare */
190 return MAX(30*60, ROUND_UP(seconds+150, 60*5));
193 static int get_maxdepth(struct plot_info *pi)
195 unsigned mm = pi->maxdepth;
196 /* Minimum 30m, rounded up to 10m, with at least 3m to spare */
197 return MAX(30000, ROUND_UP(mm+3000, 10000));
202 color_indice_t color;
204 } text_render_options_t;
207 #define CENTER (-0.5)
214 static void plot_text(struct graphics_context *gc, const text_render_options_t *tro,
215 double x, double y, const char *fmt, ...)
217 cairo_t *cr = gc->cr;
218 cairo_font_extents_t fe;
219 cairo_text_extents_t extents;
225 vsnprintf(buffer, sizeof(buffer), fmt, args);
228 cairo_set_font_size(cr, tro->size);
229 cairo_font_extents(cr, &fe);
230 cairo_text_extents(cr, buffer, &extents);
231 dx = tro->hpos * extents.width + extents.x_bearing;
232 dy = tro->vpos * extents.height + fe.descent;
235 cairo_rel_move_to(cr, dx, dy);
237 cairo_text_path(cr, buffer);
238 set_source_rgba(gc, TEXT_BACKGROUND);
242 cairo_rel_move_to(cr, dx, dy);
244 set_source_rgba(gc, tro->color);
245 cairo_show_text(cr, buffer);
252 static struct ev_select *ev_namelist;
253 static int evn_allocated;
256 void evn_foreach(void (*callback)(const char *, int *, void *), void *data)
260 for (i = 0; i < evn_used; i++) {
261 callback(ev_namelist[i].ev_name, &ev_namelist[i].plot_ev, data);
265 void remember_event(const char *eventname)
269 if (!eventname || (len = strlen(eventname)) == 0)
271 while (i < evn_used) {
272 if (!strncmp(eventname,ev_namelist[i].ev_name,len))
276 if (evn_used == evn_allocated) {
278 ev_namelist = realloc(ev_namelist, evn_allocated * sizeof(struct ev_select));
280 /* we are screwed, but let's just bail out */
283 ev_namelist[evn_used].ev_name = strdup(eventname);
284 ev_namelist[evn_used].plot_ev = TRUE;
288 static void plot_one_event(struct graphics_context *gc, struct plot_info *pi, struct event *event, const text_render_options_t *tro)
293 /* is plotting this event disabled? */
295 for (i = 0; i < evn_used; i++) {
296 if (! strcmp(event->name, ev_namelist[i].ev_name)) {
297 if (ev_namelist[i].plot_ev)
304 for (i = 0; i < pi->nr; i++) {
305 struct plot_data *data = pi->entry + i;
306 if (event->time.seconds < data->sec)
310 /* draw a little tirangular marker and attach tooltip */
311 x = SCALEX(gc, event->time.seconds);
312 y = SCALEY(gc, depth);
313 set_source_rgba(gc, ALERT_BG);
314 cairo_move_to(gc->cr, x-15, y+6);
315 cairo_line_to(gc->cr, x-3 , y+6);
316 cairo_line_to(gc->cr, x-9, y-6);
317 cairo_line_to(gc->cr, x-15, y+6);
318 cairo_stroke_preserve(gc->cr);
320 set_source_rgba(gc, ALERT_FG);
321 cairo_move_to(gc->cr, x-9, y-3);
322 cairo_line_to(gc->cr, x-9, y+1);
323 cairo_move_to(gc->cr, x-9, y+4);
324 cairo_line_to(gc->cr, x-9, y+4);
325 cairo_stroke(gc->cr);
326 attach_tooltip(x-15, y-6, 12, 12, event->name);
329 static void plot_events(struct graphics_context *gc, struct plot_info *pi, struct dive *dive)
331 static const text_render_options_t tro = {14, EVENTS, CENTER, TOP};
332 struct event *event = dive->events;
338 plot_one_event(gc, pi, event, &tro);
343 static void render_depth_sample(struct graphics_context *gc, struct plot_data *entry, const text_render_options_t *tro)
345 int sec = entry->sec, decimals;
348 d = get_depth_units(entry->depth, &decimals, NULL);
350 plot_text(gc, tro, sec, entry->depth, "%.*f", decimals, d);
353 static void plot_text_samples(struct graphics_context *gc, struct plot_info *pi)
355 static const text_render_options_t deep = {14, SAMPLE_DEEP, CENTER, TOP};
356 static const text_render_options_t shallow = {14, SAMPLE_SHALLOW, CENTER, BOTTOM};
360 for (i = 0; i < pi->nr; i++) {
361 struct plot_data *entry = pi->entry + i;
363 if (entry->depth < 2000)
366 if ((entry == entry->max[2]) && entry->depth != last) {
367 render_depth_sample(gc, entry, &deep);
371 if ((entry == entry->min[2]) && entry->depth != last) {
372 render_depth_sample(gc, entry, &shallow);
376 if (entry->depth != last)
381 static void plot_depth_text(struct graphics_context *gc, struct plot_info *pi)
383 int maxtime, maxdepth;
385 /* Get plot scaling limits */
386 maxtime = get_maxtime(pi);
387 maxdepth = get_maxdepth(pi);
389 gc->leftx = 0; gc->rightx = maxtime;
390 gc->topy = 0; gc->bottomy = maxdepth;
392 plot_text_samples(gc, pi);
395 static void plot_smoothed_profile(struct graphics_context *gc, struct plot_info *pi)
398 struct plot_data *entry = pi->entry;
400 set_source_rgba(gc, SMOOTHED);
401 move_to(gc, entry->sec, entry->smoothed);
402 for (i = 1; i < pi->nr; i++) {
404 line_to(gc, entry->sec, entry->smoothed);
406 cairo_stroke(gc->cr);
409 static void plot_minmax_profile_minute(struct graphics_context *gc, struct plot_info *pi,
413 struct plot_data *entry = pi->entry;
415 set_source_rgba(gc, MINUTE);
416 move_to(gc, entry->sec, entry->min[index]->depth);
417 for (i = 1; i < pi->nr; i++) {
419 line_to(gc, entry->sec, entry->min[index]->depth);
421 for (i = 1; i < pi->nr; i++) {
422 line_to(gc, entry->sec, entry->max[index]->depth);
425 cairo_close_path(gc->cr);
429 static void plot_minmax_profile(struct graphics_context *gc, struct plot_info *pi)
433 plot_minmax_profile_minute(gc, pi, 2);
434 plot_minmax_profile_minute(gc, pi, 1);
435 plot_minmax_profile_minute(gc, pi, 0);
438 static void plot_depth_profile(struct graphics_context *gc, struct plot_info *pi)
441 cairo_t *cr = gc->cr;
443 struct plot_data *entry;
444 int maxtime, maxdepth, marker;
445 int increments[4] = { 5*60, 10*60, 15*60, 30*60 };
447 /* Get plot scaling limits */
448 maxtime = get_maxtime(pi);
449 maxdepth = get_maxdepth(pi);
451 /* Time markers: at most every 5 min, but no more than 12 markers
452 * and for convenience we do 5, 10, 15 or 30 min intervals.
453 * This allows for 6h dives - enough (I hope) for even the craziest
454 * divers - but just in case, for those 8h depth-record-breaking dives,
455 * we double the interval if this still doesn't get us to 12 or fewer
458 while (maxtime / increments[i] > 12 && i < 4)
460 incr = increments[i];
461 while (maxtime / incr > 12)
464 gc->leftx = 0; gc->rightx = maxtime;
465 gc->topy = 0; gc->bottomy = 1.0;
466 set_source_rgba(gc, TIME_GRID);
467 cairo_set_line_width(gc->cr, 2);
469 for (i = incr; i < maxtime; i += incr) {
475 /* now the text on every second time marker */
476 text_render_options_t tro = {10, TIME_TEXT, CENTER, TOP};
477 for (i = incr; i < maxtime; i += 2 * incr)
478 plot_text(gc, &tro, i, 1, "%d", i/60);
480 /* Depth markers: every 30 ft or 10 m*/
481 gc->leftx = 0; gc->rightx = 1.0;
482 gc->topy = 0; gc->bottomy = maxdepth;
483 switch (output_units.length) {
484 case METERS: marker = 10000; break;
485 case FEET: marker = 9144; break; /* 30 ft */
488 set_source_rgba(gc, DEPTH_GRID);
489 for (i = marker; i < maxdepth; i += marker) {
495 /* Show mean depth */
497 set_source_rgba(gc, MEAN_DEPTH);
498 move_to(gc, 0, pi->meandepth);
499 line_to(gc, 1, pi->meandepth);
503 gc->leftx = 0; gc->rightx = maxtime;
506 * These are good for debugging text placement etc,
507 * but not for actual display..
510 plot_smoothed_profile(gc, pi);
511 plot_minmax_profile(gc, pi);
514 /* Do the depth profile for the neat fill */
515 gc->topy = 0; gc->bottomy = maxdepth;
517 cairo_pattern_t *pat;
518 pat = cairo_pattern_create_linear (0.0, 0.0, 0.0, 256.0);
519 pattern_add_color_stop_rgba (gc, pat, 1, DEPTH_BOTTOM);
520 pattern_add_color_stop_rgba (gc, pat, 0, DEPTH_TOP);
522 cairo_set_source(gc->cr, pat);
523 cairo_pattern_destroy(pat);
524 cairo_set_line_width(gc->cr, 2);
528 for (i = 0; i < pi->nr; i++, entry++)
529 line_to(gc, entry->sec, entry->depth);
530 cairo_close_path(gc->cr);
534 /* Now do it again for the velocity colors */
536 for (i = 1; i < pi->nr; i++) {
539 /* we want to draw the segments in different colors
540 * representing the vertical velocity, so we need to
541 * chop this into short segments */
542 depth = entry->depth;
543 set_source_rgba(gc, VELOCITY_COLORS_START_IDX + entry->velocity);
544 move_to(gc, entry[-1].sec, entry[-1].depth);
545 line_to(gc, sec, depth);
550 static int setup_temperature_limits(struct graphics_context *gc, struct plot_info *pi)
552 int maxtime, mintemp, maxtemp, delta;
554 /* Get plot scaling limits */
555 maxtime = get_maxtime(pi);
556 mintemp = pi->mintemp;
557 maxtemp = pi->maxtemp;
559 gc->leftx = 0; gc->rightx = maxtime;
560 /* Show temperatures in roughly the lower third, but make sure the scale
561 is at least somewhat reasonable */
562 delta = maxtemp - mintemp;
563 if (delta > 3000) { /* more than 3K in fluctuation */
564 gc->topy = maxtemp + delta*2;
565 gc->bottomy = mintemp - delta/2;
567 gc->topy = maxtemp + 1500 + delta*2;
568 gc->bottomy = mintemp - delta/2;
571 return maxtemp > mintemp;
574 static void plot_single_temp_text(struct graphics_context *gc, int sec, int mkelvin)
578 static const text_render_options_t tro = {12, TEMP_TEXT, LEFT, TOP};
580 deg = get_temp_units(mkelvin, &unit);
582 plot_text(gc, &tro, sec, mkelvin, "%d%s", (int)(deg + 0.5), unit);
585 static void plot_temperature_text(struct graphics_context *gc, struct plot_info *pi)
588 int last = -300, sec = 0;
589 int last_temperature = 0, last_printed_temp = 0;
591 if (!setup_temperature_limits(gc, pi))
594 for (i = 0; i < pi->nr; i++) {
595 struct plot_data *entry = pi->entry+i;
596 int mkelvin = entry->temperature;
600 last_temperature = mkelvin;
602 /* don't print a temperature
603 * if it's been less than 5min and less than a 2K change OR
604 * if it's been less than 2min OR if the change from the
605 * last print is less than .4K (and therefore less than 1F */
606 if (((sec < last + 300) && (abs(mkelvin - last_printed_temp) < 2000)) ||
607 (sec < last + 120) ||
608 (abs(mkelvin - last_printed_temp) < 400))
611 plot_single_temp_text(gc,sec,mkelvin);
612 last_printed_temp = mkelvin;
614 /* it would be nice to print the end temperature, if it's
615 * different or if the last temperature print has been more
616 * than a quarter of the dive back */
617 if ((abs(last_temperature - last_printed_temp) > 500) ||
618 ((double)last / (double)sec < 0.75))
619 plot_single_temp_text(gc, sec, last_temperature);
622 static void plot_temperature_profile(struct graphics_context *gc, struct plot_info *pi)
625 cairo_t *cr = gc->cr;
628 if (!setup_temperature_limits(gc, pi))
631 cairo_set_line_width(gc->cr, 2);
632 set_source_rgba(gc, TEMP_PLOT);
633 for (i = 0; i < pi->nr; i++) {
634 struct plot_data *entry = pi->entry + i;
635 int mkelvin = entry->temperature;
636 int sec = entry->sec;
643 line_to(gc, sec, mkelvin);
645 move_to(gc, sec, mkelvin);
651 /* gets both the actual start and end pressure as well as the scaling factors */
652 static int get_cylinder_pressure_range(struct graphics_context *gc, struct plot_info *pi)
655 gc->rightx = get_maxtime(pi);
657 gc->bottomy = 0; gc->topy = pi->maxpressure * 1.5;
658 return pi->maxpressure != 0;
661 /* set the color for the pressure plot according to temporary sac rate
662 * as compared to avg_sac; the calculation simply maps the delta between
663 * sac and avg_sac to indexes 0 .. (SAC_COLORS - 1) with everything
664 * more than 6000 ml/min below avg_sac mapped to 0 */
666 static void set_sac_color(struct graphics_context *gc, int sac, int avg_sac)
669 int delta = sac - avg_sac + 7000;
672 sac_index = delta / 2000;
675 if (sac_index > SAC_COLORS - 1)
676 sac_index = SAC_COLORS - 1;
677 set_source_rgba(gc, SAC_COLORS_START_IDX + sac_index);
679 set_source_rgba(gc, SAC_DEFAULT);
683 /* calculate the current SAC in ml/min and convert to int */
684 #define GET_LOCAL_SAC(_entry1, _entry2, _dive) (int) \
685 ((GET_PRESSURE((_entry1)) - GET_PRESSURE((_entry2))) * \
686 (_dive)->cylinder[(_entry1)->cylinderindex].type.size.mliter / \
687 (((_entry2)->sec - (_entry1)->sec) / 60.0) / \
688 (1 + ((_entry1)->depth + (_entry2)->depth) / 20000.0) / \
691 #define SAC_WINDOW 45 /* sliding window in seconds for current SAC calculation */
693 static void plot_cylinder_pressure(struct graphics_context *gc, struct plot_info *pi,
698 int lift_pen = FALSE;
699 int first_plot = TRUE;
701 struct plot_data *last_entry = NULL;
703 if (!get_cylinder_pressure_range(gc, pi))
706 cairo_set_line_width(gc->cr, 2);
708 for (i = 0; i < pi->nr; i++) {
710 struct plot_data *entry = pi->entry + i;
712 mbar = GET_PRESSURE(entry);
713 if (!entry->same_cylinder) {
724 sac = GET_LOCAL_SAC(entry, pi->entry + i + 1, dive);
728 for (j = last; j < i; j++)
729 sac += GET_LOCAL_SAC(pi->entry + j, pi->entry + j + 1, dive);
731 if (entry->sec - last_entry->sec >= SAC_WINDOW) {
733 last_entry = pi->entry + last;
736 set_sac_color(gc, sac, dive->sac);
738 if (!first_plot && entry->same_cylinder) {
739 /* if we have a previous event from the same tank,
740 * draw at least a short line */
742 prev_pr = GET_PRESSURE(entry - 1);
743 move_to(gc, (entry-1)->sec, prev_pr);
744 line_to(gc, entry->sec, mbar);
747 move_to(gc, entry->sec, mbar);
751 line_to(gc, entry->sec, mbar);
753 cairo_stroke(gc->cr);
754 move_to(gc, entry->sec, mbar);
758 static void plot_pressure_value(struct graphics_context *gc, int mbar, int sec,
759 int xalign, int yalign)
764 pressure = get_pressure_units(mbar, &unit);
765 text_render_options_t tro = {10, PRESSURE_TEXT, xalign, yalign};
766 plot_text(gc, &tro, sec, mbar, "%d %s", pressure, unit);
769 static void plot_cylinder_pressure_text(struct graphics_context *gc, struct plot_info *pi)
773 int seen_cyl[MAX_CYLINDERS] = { FALSE, };
774 int last_pressure[MAX_CYLINDERS] = { 0, };
775 int last_time[MAX_CYLINDERS] = { 0, };
776 struct plot_data *entry;
778 if (!get_cylinder_pressure_range(gc, pi))
781 /* only loop over the actual events from the dive computer
782 * plus the second synthetic event at the start (to make sure
783 * we get "time=0" right)
784 * sadly with a recent change that first entry may no longer
785 * have any pressure reading - in that case just grab the
786 * pressure from the second entry */
787 if (GET_PRESSURE(pi->entry + 1) == 0 && GET_PRESSURE(pi->entry + 2) !=0)
788 INTERPOLATED_PRESSURE(pi->entry + 1) = GET_PRESSURE(pi->entry + 2);
789 for (i = 1; i < pi->nr; i++) {
790 entry = pi->entry + i;
792 if (!entry->same_cylinder) {
793 cyl = entry->cylinderindex;
794 if (!seen_cyl[cyl]) {
795 mbar = GET_PRESSURE(entry);
796 plot_pressure_value(gc, mbar, entry->sec, LEFT, BOTTOM);
797 seen_cyl[cyl] = TRUE;
800 /* remember the last pressure and time of
801 * the previous cylinder */
802 cyl = (entry - 1)->cylinderindex;
803 last_pressure[cyl] = GET_PRESSURE(entry - 1);
804 last_time[cyl] = (entry - 1)->sec;
808 cyl = entry->cylinderindex;
809 if (GET_PRESSURE(entry))
810 last_pressure[cyl] = GET_PRESSURE(entry);
811 last_time[cyl] = entry->sec;
813 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) {
814 if (last_time[cyl]) {
815 plot_pressure_value(gc, last_pressure[cyl], last_time[cyl], CENTER, TOP);
820 static void analyze_plot_info_minmax_minute(struct plot_data *entry, struct plot_data *first, struct plot_data *last, int index)
822 struct plot_data *p = entry;
823 int time = entry->sec;
824 int seconds = 90*(index+1);
825 struct plot_data *min, *max;
828 /* Go back 'seconds' in time */
830 if (p[-1].sec < time - seconds)
835 /* Then go forward until we hit an entry past the time */
840 int depth = p->depth;
841 if (p->sec > time + seconds)
845 if (depth < min->depth)
847 if (depth > max->depth)
850 entry->min[index] = min;
851 entry->max[index] = max;
852 entry->avg[index] = (avg + nr/2) / nr;
855 static void analyze_plot_info_minmax(struct plot_data *entry, struct plot_data *first, struct plot_data *last)
857 analyze_plot_info_minmax_minute(entry, first, last, 0);
858 analyze_plot_info_minmax_minute(entry, first, last, 1);
859 analyze_plot_info_minmax_minute(entry, first, last, 2);
862 static velocity_t velocity(int speed)
866 if (speed < -304) /* ascent faster than -60ft/min */
868 else if (speed < -152) /* above -30ft/min */
870 else if (speed < -76) /* -15ft/min */
872 else if (speed < -25) /* -5ft/min */
874 else if (speed < 25) /* very hard to find data, but it appears that the recommendations
875 for descent are usually about 2x ascent rate; still, we want
876 stable to mean stable */
878 else if (speed < 152) /* between 5 and 30ft/min is considered slow */
880 else if (speed < 304) /* up to 60ft/min is moderate */
882 else if (speed < 507) /* up to 100ft/min is fast */
884 else /* more than that is just crazy - you'll blow your ears out */
889 static struct plot_info *analyze_plot_info(struct plot_info *pi)
894 /* Do pressure min/max based on the non-surface data */
895 for (i = 0; i < nr; i++) {
896 struct plot_data *entry = pi->entry+i;
897 int pressure = GET_PRESSURE(entry);
898 int temperature = entry->temperature;
901 if (pressure > pi->maxpressure)
902 pi->maxpressure = pressure;
906 if (!pi->mintemp || temperature < pi->mintemp)
907 pi->mintemp = temperature;
908 if (temperature > pi->maxtemp)
909 pi->maxtemp = temperature;
913 /* Smoothing function: 5-point triangular smooth */
914 for (i = 2; i < nr; i++) {
915 struct plot_data *entry = pi->entry+i;
919 depth = entry[-2].depth + 2*entry[-1].depth + 3*entry[0].depth + 2*entry[1].depth + entry[2].depth;
920 entry->smoothed = (depth+4) / 9;
922 /* vertical velocity in mm/sec */
923 /* Linus wants to smooth this - let's at least look at the samples that aren't FAST or CRAZY */
924 if (entry[0].sec - entry[-1].sec) {
925 entry->velocity = velocity((entry[0].depth - entry[-1].depth) / (entry[0].sec - entry[-1].sec));
926 /* if our samples are short and we aren't too FAST*/
927 if (entry[0].sec - entry[-1].sec < 15 && entry->velocity < FAST) {
929 while (i+past > 0 && entry[0].sec - entry[past].sec < 15)
931 entry->velocity = velocity((entry[0].depth - entry[past].depth) /
932 (entry[0].sec - entry[past].sec));
935 entry->velocity = STABLE;
938 /* One-, two- and three-minute minmax data */
939 for (i = 0; i < nr; i++) {
940 struct plot_data *entry = pi->entry +i;
941 analyze_plot_info_minmax(entry, pi->entry, pi->entry+nr);
948 * simple structure to track the beginning and end tank pressure as
949 * well as the integral of depth over time spent while we have no
950 * pressure reading from the tank */
951 typedef struct pr_track_struct pr_track_t;
952 struct pr_track_struct {
957 double pressure_time;
961 static pr_track_t *pr_track_alloc(int start, int t_start) {
962 pr_track_t *pt = malloc(sizeof(pr_track_t));
964 pt->t_start = t_start;
967 pt->pressure_time = 0.0;
972 /* poor man's linked list */
973 static pr_track_t *list_last(pr_track_t *list)
975 pr_track_t *tail = list;
984 static pr_track_t *list_add(pr_track_t *list, pr_track_t *element)
986 pr_track_t *tail = list_last(list);
989 tail->next = element;
993 static void list_free(pr_track_t *list)
997 list_free(list->next);
1001 static void dump_pr_track(pr_track_t **track_pr)
1006 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) {
1007 list = track_pr[cyl];
1009 printf("cyl%d: start %d end %d t_start %d t_end %d pt %6.3f\n", cyl,
1010 list->start, list->end, list->t_start, list->t_end, list->pressure_time);
1016 static void fill_missing_tank_pressures(struct dive *dive, struct plot_info *pi,
1017 pr_track_t **track_pr)
1019 pr_track_t *list = NULL;
1020 pr_track_t *nlist = NULL;
1023 struct plot_data *entry;
1024 int cur_pr[MAX_CYLINDERS];
1027 /* another great debugging tool */
1028 dump_pr_track(track_pr);
1030 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) {
1031 cur_pr[cyl] = track_pr[cyl]->start;
1034 /* The first two are "fillers", but in case we don't have a sample
1035 * at time 0 we need to process the second of them here */
1036 for (i = 1; i < pi->nr; i++) {
1037 entry = pi->entry + i;
1038 if (SENSOR_PRESSURE(entry)) {
1039 cur_pr[entry->cylinderindex] = SENSOR_PRESSURE(entry);
1041 if(!list || list->t_end < entry->sec) {
1042 nlist = track_pr[entry->cylinderindex];
1044 while (nlist && nlist->t_start <= entry->sec) {
1048 /* there may be multiple segments - so
1049 * let's assemble the length */
1051 pt = list->pressure_time;
1052 while (!nlist->end) {
1053 nlist = nlist->next;
1055 /* oops - we have no end pressure,
1056 * so this means this is a tank without
1057 * gas consumption information */
1060 pt += nlist->pressure_time;
1063 /* just continue without calculating
1064 * interpolated values */
1065 INTERPOLATED_PRESSURE(entry) = cur_pr[entry->cylinderindex];
1069 magic = (nlist->end - cur_pr[entry->cylinderindex]) / pt;
1072 double cur_pt = (entry->sec - (entry-1)->sec) *
1073 (1 + (entry->depth + (entry-1)->depth) / 20000.0);
1074 INTERPOLATED_PRESSURE(entry) =
1075 cur_pr[entry->cylinderindex] + cur_pt * magic + 0.5;
1076 cur_pr[entry->cylinderindex] = INTERPOLATED_PRESSURE(entry);
1078 INTERPOLATED_PRESSURE(entry) = cur_pr[entry->cylinderindex];
1083 static int get_cylinder_index(struct dive *dive, struct event *ev)
1088 * Try to find a cylinder that matches the O2 percentage
1089 * in the gas change event 'value' field.
1091 * Crazy suunto gas change events. We really should do
1092 * this in libdivecomputer or something.
1094 for (i = 0; i < MAX_CYLINDERS; i++) {
1095 cylinder_t *cyl = dive->cylinder+i;
1096 int o2 = (cyl->gasmix.o2.permille + 5) / 10;
1097 if (o2 == ev->value)
1104 static struct event *get_next_gaschange(struct event *event)
1107 if (!strcmp(event->name, "gaschange"))
1109 event = event->next;
1114 static int set_cylinder_index(struct plot_info *pi, int i, int cylinderindex, unsigned int end)
1116 while (i < pi->nr) {
1117 struct plot_data *entry = pi->entry+i;
1118 if (entry->sec > end)
1120 if (entry->cylinderindex != cylinderindex) {
1121 entry->cylinderindex = cylinderindex;
1122 entry->pressure[0] = 0;
1129 static void check_gas_change_events(struct dive *dive, struct plot_info *pi)
1131 int i = 0, cylinderindex = 0;
1132 struct event *ev = get_next_gaschange(dive->events);
1138 i = set_cylinder_index(pi, i, cylinderindex, ev->time.seconds);
1139 cylinderindex = get_cylinder_index(dive, ev);
1140 ev = get_next_gaschange(ev->next);
1142 set_cylinder_index(pi, i, cylinderindex, ~0u);
1145 /* for computers that track gas changes through events */
1146 static int count_gas_change_events(struct dive *dive)
1149 struct event *ev = get_next_gaschange(dive->events);
1153 ev = get_next_gaschange(ev->next);
1159 * Create a plot-info with smoothing and ranged min/max
1161 * This also makes sure that we have extra empty events on both
1162 * sides, so that you can do end-points without having to worry
1165 static struct plot_info *create_plot_info(struct dive *dive, int nr_samples, struct sample *dive_sample)
1167 int cylinderindex = -1;
1168 int lastdepth, lastindex;
1169 int i, pi_idx, nr, sec, cyl;
1171 struct plot_info *pi;
1172 pr_track_t *track_pr[MAX_CYLINDERS] = {NULL, };
1173 pr_track_t *pr_track, *current;
1174 gboolean missing_pr = FALSE;
1175 struct plot_data *entry = NULL;
1178 /* we want to potentially add synthetic plot_info elements for the gas changes */
1179 nr = nr_samples + 4 + 2 * count_gas_change_events(dive);
1180 alloc_size = plot_info_size(nr);
1181 pi = malloc(alloc_size);
1184 memset(pi, 0, alloc_size);
1186 pi_idx = 2; /* the two extra events at the start */
1187 /* check for gas changes before the samples start */
1188 ev = get_next_gaschange(dive->events);
1189 while (ev && ev->time.seconds < dive_sample->time.seconds) {
1190 entry = pi->entry + pi_idx;
1191 entry->sec = ev->time.seconds;
1192 entry->depth = 0; /* is that always correct ? */
1194 ev = get_next_gaschange(ev->next);
1196 if (ev && ev->time.seconds == dive_sample->time.seconds) {
1197 /* we already have a sample at the time of the event */
1198 ev = get_next_gaschange(ev->next);
1203 for (i = 0; i < nr_samples; i++) {
1206 struct sample *sample = dive_sample+i;
1208 entry = pi->entry + i + pi_idx;
1209 while (ev && ev->time.seconds < sample->time.seconds) {
1210 /* insert two fake plot info structures for the end of
1211 * the old tank and the start of the new tank */
1212 if (ev->time.seconds == sample->time.seconds - 1) {
1213 entry->sec = ev->time.seconds - 1;
1214 (entry+1)->sec = ev->time.seconds;
1216 entry->sec = ev->time.seconds;
1217 (entry+1)->sec = ev->time.seconds + 1;
1219 /* we need a fake depth - let's interpolate */
1221 entry->depth = sample->depth.mm -
1222 (sample->depth.mm - (sample-1)->depth.mm) / 2;
1224 entry->depth = sample->depth.mm;
1225 (entry+1)->depth = entry->depth;
1227 entry = pi->entry + i + pi_idx;
1228 ev = get_next_gaschange(ev->next);
1230 if (ev && ev->time.seconds == sample->time.seconds) {
1231 /* we already have a sample at the time of the event
1232 * just add a new one for the old tank and delay the
1233 * real even by one second (to keep time monotonous) */
1234 entry->sec = ev->time.seconds;
1235 entry->depth = sample->depth.mm;
1237 entry = pi->entry + i + pi_idx;
1238 ev = get_next_gaschange(ev->next);
1241 sec = entry->sec = sample->time.seconds + delay;
1242 depth = entry->depth = sample->depth.mm;
1243 entry->cylinderindex = sample->cylinderindex;
1244 SENSOR_PRESSURE(entry) = sample->cylinderpressure.mbar;
1245 entry->temperature = sample->temperature.mkelvin;
1247 if (depth || lastdepth)
1248 lastindex = i + pi_idx;
1251 if (depth > pi->maxdepth)
1252 pi->maxdepth = depth;
1254 entry = pi->entry + i + pi_idx;
1255 /* are there still unprocessed gas changes? that would be very strange */
1257 entry->sec = ev->time.seconds;
1258 entry->depth = 0; /* why are there gas changes after the dive is over? */
1260 entry = pi->entry + i + pi_idx;
1261 ev = get_next_gaschange(ev->next);
1263 nr = nr_samples + pi_idx - 2;
1264 check_gas_change_events(dive, pi);
1266 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) /* initialize the start pressures */
1267 track_pr[cyl] = pr_track_alloc(dive->cylinder[cyl].start.mbar, -1);
1268 current = track_pr[pi->entry[2].cylinderindex];
1269 for (i = 0; i < nr + 1; i++) {
1270 entry = pi->entry + i + 1;
1272 entry->same_cylinder = entry->cylinderindex == cylinderindex;
1273 cylinderindex = entry->cylinderindex;
1275 /* track the segments per cylinder and their pressure/time integral */
1276 if (!entry->same_cylinder) {
1277 current->end = SENSOR_PRESSURE(entry-1);
1278 current->t_end = (entry-1)->sec;
1279 current = pr_track_alloc(SENSOR_PRESSURE(entry), entry->sec);
1280 track_pr[cylinderindex] = list_add(track_pr[cylinderindex], current);
1281 } else { /* same cylinder */
1282 if ((!SENSOR_PRESSURE(entry) && SENSOR_PRESSURE(entry-1)) ||
1283 (SENSOR_PRESSURE(entry) && !SENSOR_PRESSURE(entry-1))) {
1284 /* transmitter changed its working status */
1285 current->end = SENSOR_PRESSURE(entry-1);
1286 current->t_end = (entry-1)->sec;
1287 current = pr_track_alloc(SENSOR_PRESSURE(entry), entry->sec);
1288 track_pr[cylinderindex] =
1289 list_add(track_pr[cylinderindex], current);
1292 /* finally, do the discrete integration to get the SAC rate equivalent */
1293 current->pressure_time += (entry->sec - (entry-1)->sec) *
1294 (1 + (entry->depth + (entry-1)->depth) / 20000.0);
1295 missing_pr |= !SENSOR_PRESSURE(entry);
1299 current->t_end = entry->sec;
1301 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) { /* initialize the end pressures */
1302 int pr = dive->cylinder[cyl].end.mbar;
1303 if (pr && track_pr[cyl]) {
1304 pr_track = list_last(track_pr[cyl]);
1308 /* Fill in the last two entries with empty values but valid times
1309 * without creating a false cylinder change event */
1311 pi->entry[i].sec = sec + 20;
1312 pi->entry[i].same_cylinder = 1;
1313 pi->entry[i].cylinderindex = pi->entry[i-1].cylinderindex;
1314 INTERPOLATED_PRESSURE(pi->entry + i) = GET_PRESSURE(pi->entry + i - 1);
1315 pi->entry[i+1].sec = sec + 40;
1316 pi->entry[i+1].same_cylinder = 1;
1317 pi->entry[i+1].cylinderindex = pi->entry[i-1].cylinderindex;
1318 INTERPOLATED_PRESSURE(pi->entry + i + 1) = GET_PRESSURE(pi->entry + i - 1);
1319 /* the number of actual entries - some computers have lots of
1320 * depth 0 samples at the end of a dive, we want to make sure
1321 * we have exactly one of them at the end */
1322 pi->nr = lastindex+1;
1323 while (pi->nr <= i+2 && pi->entry[pi->nr-1].depth > 0)
1325 pi->maxtime = pi->entry[lastindex].sec;
1327 /* Analyze_plot_info() will do the sample max pressures,
1328 * this handles the manual pressures
1330 pi->maxpressure = 0;
1331 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) {
1332 unsigned int mbar = dive->cylinder[cyl].start.mbar;
1333 if (mbar > pi->maxpressure)
1334 pi->maxpressure = mbar;
1337 pi->meandepth = dive->meandepth.mm;
1340 fill_missing_tank_pressures(dive, pi, track_pr);
1342 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++)
1343 list_free(track_pr[cyl]);
1344 if (0) /* awesome for debugging - not useful otherwise */
1346 return analyze_plot_info(pi);
1349 void plot(struct graphics_context *gc, cairo_rectangle_int_t *drawing_area, struct dive *dive)
1351 struct plot_info *pi;
1352 static struct sample fake[4];
1353 struct sample *sample = dive->sample;
1354 int nr = dive->samples;
1357 int duration = dive->duration.seconds;
1358 int maxdepth = dive->maxdepth.mm;
1360 fake[1].time.seconds = duration * 0.05;
1361 fake[1].depth.mm = maxdepth;
1362 fake[2].time.seconds = duration * 0.95;
1363 fake[2].depth.mm = maxdepth;
1364 fake[3].time.seconds = duration * 1.00;
1368 pi = create_plot_info(dive, nr, sample);
1370 cairo_translate(gc->cr, drawing_area->x, drawing_area->y);
1371 cairo_set_line_width(gc->cr, 1);
1372 cairo_set_line_cap(gc->cr, CAIRO_LINE_CAP_ROUND);
1373 cairo_set_line_join(gc->cr, CAIRO_LINE_JOIN_ROUND);
1376 * We can use "cairo_translate()" because that doesn't
1377 * scale line width etc. But the actual scaling we need
1378 * do set up ourselves..
1380 * Snif. What a pity.
1382 gc->maxx = (drawing_area->width - 2*drawing_area->x);
1383 gc->maxy = (drawing_area->height - 2*drawing_area->y);
1385 /* Temperature profile */
1386 plot_temperature_profile(gc, pi);
1389 plot_depth_profile(gc, pi);
1390 plot_events(gc, pi, dive);
1392 /* Cylinder pressure plot */
1393 plot_cylinder_pressure(gc, pi, dive);
1395 /* Text on top of all graphs.. */
1396 plot_temperature_text(gc, pi);
1397 plot_depth_text(gc, pi);
1398 plot_cylinder_pressure_text(gc, pi);
1400 /* Bounding box last */
1401 gc->leftx = 0; gc->rightx = 1.0;
1402 gc->topy = 0; gc->bottomy = 1.0;
1404 set_source_rgba(gc, BOUNDING_BOX);
1405 cairo_set_line_width(gc->cr, 1);
1410 cairo_close_path(gc->cr);
1411 cairo_stroke(gc->cr);