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);
533 set_source_rgba(gc, DEPTH_FILL_PRINTER);
534 cairo_fill_preserve(cr);
535 set_source_rgba(gc, DEPTH_STROKE_PRINTER);
539 */ cairo_fill(gc->cr);
541 /* Now do it again for the velocity colors */
543 for (i = 1; i < pi->nr; i++) {
546 /* we want to draw the segments in different colors
547 * representing the vertical velocity, so we need to
548 * chop this into short segments */
549 depth = entry->depth;
550 set_source_rgba(gc, VELOCITY_COLORS_START_IDX + entry->velocity);
551 move_to(gc, entry[-1].sec, entry[-1].depth);
552 line_to(gc, sec, depth);
557 static int setup_temperature_limits(struct graphics_context *gc, struct plot_info *pi)
559 int maxtime, mintemp, maxtemp, delta;
561 /* Get plot scaling limits */
562 maxtime = get_maxtime(pi);
563 mintemp = pi->mintemp;
564 maxtemp = pi->maxtemp;
566 gc->leftx = 0; gc->rightx = maxtime;
567 /* Show temperatures in roughly the lower third, but make sure the scale
568 is at least somewhat reasonable */
569 delta = maxtemp - mintemp;
570 if (delta > 3000) { /* more than 3K in fluctuation */
571 gc->topy = maxtemp + delta*2;
572 gc->bottomy = mintemp - delta/2;
574 gc->topy = maxtemp + 1500 + delta*2;
575 gc->bottomy = mintemp - delta/2;
578 return maxtemp > mintemp;
581 static void plot_single_temp_text(struct graphics_context *gc, int sec, int mkelvin)
585 static const text_render_options_t tro = {12, TEMP_TEXT, LEFT, TOP};
587 deg = get_temp_units(mkelvin, &unit);
589 plot_text(gc, &tro, sec, mkelvin, "%d%s", (int)(deg + 0.5), unit);
592 static void plot_temperature_text(struct graphics_context *gc, struct plot_info *pi)
595 int last = -300, sec = 0;
596 int last_temperature = 0, last_printed_temp = 0;
598 if (!setup_temperature_limits(gc, pi))
601 for (i = 0; i < pi->nr; i++) {
602 struct plot_data *entry = pi->entry+i;
603 int mkelvin = entry->temperature;
607 last_temperature = mkelvin;
609 /* don't print a temperature
610 * if it's been less than 5min and less than a 2K change OR
611 * if it's been less than 2min OR if the change from the
612 * last print is less than .4K (and therefore less than 1F */
613 if (((sec < last + 300) && (abs(mkelvin - last_printed_temp) < 2000)) ||
614 (sec < last + 120) ||
615 (abs(mkelvin - last_printed_temp) < 400))
618 plot_single_temp_text(gc,sec,mkelvin);
619 last_printed_temp = mkelvin;
621 /* it would be nice to print the end temperature, if it's
622 * different or if the last temperature print has been more
623 * than a quarter of the dive back */
624 if ((abs(last_temperature - last_printed_temp) > 500) ||
625 ((double)last / (double)sec < 0.75))
626 plot_single_temp_text(gc, sec, last_temperature);
629 static void plot_temperature_profile(struct graphics_context *gc, struct plot_info *pi)
632 cairo_t *cr = gc->cr;
635 if (!setup_temperature_limits(gc, pi))
638 cairo_set_line_width(gc->cr, 2);
639 set_source_rgba(gc, TEMP_PLOT);
640 for (i = 0; i < pi->nr; i++) {
641 struct plot_data *entry = pi->entry + i;
642 int mkelvin = entry->temperature;
643 int sec = entry->sec;
650 line_to(gc, sec, mkelvin);
652 move_to(gc, sec, mkelvin);
658 /* gets both the actual start and end pressure as well as the scaling factors */
659 static int get_cylinder_pressure_range(struct graphics_context *gc, struct plot_info *pi)
662 gc->rightx = get_maxtime(pi);
664 gc->bottomy = 0; gc->topy = pi->maxpressure * 1.5;
665 return pi->maxpressure != 0;
668 /* set the color for the pressure plot according to temporary sac rate
669 * as compared to avg_sac; the calculation simply maps the delta between
670 * sac and avg_sac to indexes 0 .. (SAC_COLORS - 1) with everything
671 * more than 6000 ml/min below avg_sac mapped to 0 */
673 static void set_sac_color(struct graphics_context *gc, int sac, int avg_sac)
676 int delta = sac - avg_sac + 7000;
679 sac_index = delta / 2000;
682 if (sac_index > SAC_COLORS - 1)
683 sac_index = SAC_COLORS - 1;
684 set_source_rgba(gc, SAC_COLORS_START_IDX + sac_index);
686 set_source_rgba(gc, SAC_DEFAULT);
690 /* calculate the current SAC in ml/min and convert to int */
691 #define GET_LOCAL_SAC(_entry1, _entry2, _dive) (int) \
692 ((GET_PRESSURE((_entry1)) - GET_PRESSURE((_entry2))) * \
693 (_dive)->cylinder[(_entry1)->cylinderindex].type.size.mliter / \
694 (((_entry2)->sec - (_entry1)->sec) / 60.0) / \
695 (1 + ((_entry1)->depth + (_entry2)->depth) / 20000.0) / \
698 #define SAC_WINDOW 45 /* sliding window in seconds for current SAC calculation */
700 static void plot_cylinder_pressure(struct graphics_context *gc, struct plot_info *pi,
705 int lift_pen = FALSE;
706 int first_plot = TRUE;
708 struct plot_data *last_entry = NULL;
710 if (!get_cylinder_pressure_range(gc, pi))
713 cairo_set_line_width(gc->cr, 2);
715 for (i = 0; i < pi->nr; i++) {
717 struct plot_data *entry = pi->entry + i;
719 mbar = GET_PRESSURE(entry);
720 if (!entry->same_cylinder) {
731 sac = GET_LOCAL_SAC(entry, pi->entry + i + 1, dive);
735 for (j = last; j < i; j++)
736 sac += GET_LOCAL_SAC(pi->entry + j, pi->entry + j + 1, dive);
738 if (entry->sec - last_entry->sec >= SAC_WINDOW) {
740 last_entry = pi->entry + last;
743 set_sac_color(gc, sac, dive->sac);
745 if (!first_plot && entry->same_cylinder) {
746 /* if we have a previous event from the same tank,
747 * draw at least a short line */
749 prev_pr = GET_PRESSURE(entry - 1);
750 move_to(gc, (entry-1)->sec, prev_pr);
751 line_to(gc, entry->sec, mbar);
754 move_to(gc, entry->sec, mbar);
758 line_to(gc, entry->sec, mbar);
760 cairo_stroke(gc->cr);
761 move_to(gc, entry->sec, mbar);
765 static void plot_pressure_value(struct graphics_context *gc, int mbar, int sec,
766 int xalign, int yalign)
771 pressure = get_pressure_units(mbar, &unit);
772 text_render_options_t tro = {10, PRESSURE_TEXT, xalign, yalign};
773 plot_text(gc, &tro, sec, mbar, "%d %s", pressure, unit);
776 static void plot_cylinder_pressure_text(struct graphics_context *gc, struct plot_info *pi)
780 int seen_cyl[MAX_CYLINDERS] = { FALSE, };
781 int last_pressure[MAX_CYLINDERS] = { 0, };
782 int last_time[MAX_CYLINDERS] = { 0, };
783 struct plot_data *entry;
785 if (!get_cylinder_pressure_range(gc, pi))
788 /* only loop over the actual events from the dive computer
789 * plus the second synthetic event at the start (to make sure
790 * we get "time=0" right)
791 * sadly with a recent change that first entry may no longer
792 * have any pressure reading - in that case just grab the
793 * pressure from the second entry */
794 if (GET_PRESSURE(pi->entry + 1) == 0 && GET_PRESSURE(pi->entry + 2) !=0)
795 INTERPOLATED_PRESSURE(pi->entry + 1) = GET_PRESSURE(pi->entry + 2);
796 for (i = 1; i < pi->nr; i++) {
797 entry = pi->entry + i;
799 if (!entry->same_cylinder) {
800 cyl = entry->cylinderindex;
801 if (!seen_cyl[cyl]) {
802 mbar = GET_PRESSURE(entry);
803 plot_pressure_value(gc, mbar, entry->sec, LEFT, BOTTOM);
804 seen_cyl[cyl] = TRUE;
807 /* remember the last pressure and time of
808 * the previous cylinder */
809 cyl = (entry - 1)->cylinderindex;
810 last_pressure[cyl] = GET_PRESSURE(entry - 1);
811 last_time[cyl] = (entry - 1)->sec;
815 cyl = entry->cylinderindex;
816 if (GET_PRESSURE(entry))
817 last_pressure[cyl] = GET_PRESSURE(entry);
818 last_time[cyl] = entry->sec;
820 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) {
821 if (last_time[cyl]) {
822 plot_pressure_value(gc, last_pressure[cyl], last_time[cyl], CENTER, TOP);
827 static void analyze_plot_info_minmax_minute(struct plot_data *entry, struct plot_data *first, struct plot_data *last, int index)
829 struct plot_data *p = entry;
830 int time = entry->sec;
831 int seconds = 90*(index+1);
832 struct plot_data *min, *max;
835 /* Go back 'seconds' in time */
837 if (p[-1].sec < time - seconds)
842 /* Then go forward until we hit an entry past the time */
847 int depth = p->depth;
848 if (p->sec > time + seconds)
852 if (depth < min->depth)
854 if (depth > max->depth)
857 entry->min[index] = min;
858 entry->max[index] = max;
859 entry->avg[index] = (avg + nr/2) / nr;
862 static void analyze_plot_info_minmax(struct plot_data *entry, struct plot_data *first, struct plot_data *last)
864 analyze_plot_info_minmax_minute(entry, first, last, 0);
865 analyze_plot_info_minmax_minute(entry, first, last, 1);
866 analyze_plot_info_minmax_minute(entry, first, last, 2);
869 static velocity_t velocity(int speed)
873 if (speed < -304) /* ascent faster than -60ft/min */
875 else if (speed < -152) /* above -30ft/min */
877 else if (speed < -76) /* -15ft/min */
879 else if (speed < -25) /* -5ft/min */
881 else if (speed < 25) /* very hard to find data, but it appears that the recommendations
882 for descent are usually about 2x ascent rate; still, we want
883 stable to mean stable */
885 else if (speed < 152) /* between 5 and 30ft/min is considered slow */
887 else if (speed < 304) /* up to 60ft/min is moderate */
889 else if (speed < 507) /* up to 100ft/min is fast */
891 else /* more than that is just crazy - you'll blow your ears out */
896 static struct plot_info *analyze_plot_info(struct plot_info *pi)
901 /* Do pressure min/max based on the non-surface data */
902 for (i = 0; i < nr; i++) {
903 struct plot_data *entry = pi->entry+i;
904 int pressure = GET_PRESSURE(entry);
905 int temperature = entry->temperature;
908 if (pressure > pi->maxpressure)
909 pi->maxpressure = pressure;
913 if (!pi->mintemp || temperature < pi->mintemp)
914 pi->mintemp = temperature;
915 if (temperature > pi->maxtemp)
916 pi->maxtemp = temperature;
920 /* Smoothing function: 5-point triangular smooth */
921 for (i = 2; i < nr; i++) {
922 struct plot_data *entry = pi->entry+i;
926 depth = entry[-2].depth + 2*entry[-1].depth + 3*entry[0].depth + 2*entry[1].depth + entry[2].depth;
927 entry->smoothed = (depth+4) / 9;
929 /* vertical velocity in mm/sec */
930 /* Linus wants to smooth this - let's at least look at the samples that aren't FAST or CRAZY */
931 if (entry[0].sec - entry[-1].sec) {
932 entry->velocity = velocity((entry[0].depth - entry[-1].depth) / (entry[0].sec - entry[-1].sec));
933 /* if our samples are short and we aren't too FAST*/
934 if (entry[0].sec - entry[-1].sec < 15 && entry->velocity < FAST) {
936 while (i+past > 0 && entry[0].sec - entry[past].sec < 15)
938 entry->velocity = velocity((entry[0].depth - entry[past].depth) /
939 (entry[0].sec - entry[past].sec));
942 entry->velocity = STABLE;
945 /* One-, two- and three-minute minmax data */
946 for (i = 0; i < nr; i++) {
947 struct plot_data *entry = pi->entry +i;
948 analyze_plot_info_minmax(entry, pi->entry, pi->entry+nr);
955 * simple structure to track the beginning and end tank pressure as
956 * well as the integral of depth over time spent while we have no
957 * pressure reading from the tank */
958 typedef struct pr_track_struct pr_track_t;
959 struct pr_track_struct {
964 double pressure_time;
968 static pr_track_t *pr_track_alloc(int start, int t_start) {
969 pr_track_t *pt = malloc(sizeof(pr_track_t));
971 pt->t_start = t_start;
974 pt->pressure_time = 0.0;
979 /* poor man's linked list */
980 static pr_track_t *list_last(pr_track_t *list)
982 pr_track_t *tail = list;
991 static pr_track_t *list_add(pr_track_t *list, pr_track_t *element)
993 pr_track_t *tail = list_last(list);
996 tail->next = element;
1000 static void list_free(pr_track_t *list)
1004 list_free(list->next);
1008 static void dump_pr_track(pr_track_t **track_pr)
1013 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) {
1014 list = track_pr[cyl];
1016 printf("cyl%d: start %d end %d t_start %d t_end %d pt %6.3f\n", cyl,
1017 list->start, list->end, list->t_start, list->t_end, list->pressure_time);
1023 static void fill_missing_tank_pressures(struct dive *dive, struct plot_info *pi,
1024 pr_track_t **track_pr)
1026 pr_track_t *list = NULL;
1027 pr_track_t *nlist = NULL;
1030 struct plot_data *entry;
1031 int cur_pr[MAX_CYLINDERS];
1034 /* another great debugging tool */
1035 dump_pr_track(track_pr);
1037 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) {
1038 cur_pr[cyl] = track_pr[cyl]->start;
1041 /* The first two are "fillers", but in case we don't have a sample
1042 * at time 0 we need to process the second of them here */
1043 for (i = 1; i < pi->nr; i++) {
1044 entry = pi->entry + i;
1045 if (SENSOR_PRESSURE(entry)) {
1046 cur_pr[entry->cylinderindex] = SENSOR_PRESSURE(entry);
1048 if(!list || list->t_end < entry->sec) {
1049 nlist = track_pr[entry->cylinderindex];
1051 while (nlist && nlist->t_start <= entry->sec) {
1055 /* there may be multiple segments - so
1056 * let's assemble the length */
1058 pt = list->pressure_time;
1059 while (!nlist->end) {
1060 nlist = nlist->next;
1062 /* oops - we have no end pressure,
1063 * so this means this is a tank without
1064 * gas consumption information */
1067 pt += nlist->pressure_time;
1070 /* just continue without calculating
1071 * interpolated values */
1072 INTERPOLATED_PRESSURE(entry) = cur_pr[entry->cylinderindex];
1076 magic = (nlist->end - cur_pr[entry->cylinderindex]) / pt;
1079 double cur_pt = (entry->sec - (entry-1)->sec) *
1080 (1 + (entry->depth + (entry-1)->depth) / 20000.0);
1081 INTERPOLATED_PRESSURE(entry) =
1082 cur_pr[entry->cylinderindex] + cur_pt * magic + 0.5;
1083 cur_pr[entry->cylinderindex] = INTERPOLATED_PRESSURE(entry);
1085 INTERPOLATED_PRESSURE(entry) = cur_pr[entry->cylinderindex];
1090 static int get_cylinder_index(struct dive *dive, struct event *ev)
1095 * Try to find a cylinder that matches the O2 percentage
1096 * in the gas change event 'value' field.
1098 * Crazy suunto gas change events. We really should do
1099 * this in libdivecomputer or something.
1101 for (i = 0; i < MAX_CYLINDERS; i++) {
1102 cylinder_t *cyl = dive->cylinder+i;
1103 int o2 = (cyl->gasmix.o2.permille + 5) / 10;
1104 if (o2 == ev->value)
1111 static struct event *get_next_gaschange(struct event *event)
1114 if (!strcmp(event->name, "gaschange"))
1116 event = event->next;
1121 static int set_cylinder_index(struct plot_info *pi, int i, int cylinderindex, unsigned int end)
1123 while (i < pi->nr) {
1124 struct plot_data *entry = pi->entry+i;
1125 if (entry->sec > end)
1127 if (entry->cylinderindex != cylinderindex) {
1128 entry->cylinderindex = cylinderindex;
1129 entry->pressure[0] = 0;
1136 static void check_gas_change_events(struct dive *dive, struct plot_info *pi)
1138 int i = 0, cylinderindex = 0;
1139 struct event *ev = get_next_gaschange(dive->events);
1145 i = set_cylinder_index(pi, i, cylinderindex, ev->time.seconds);
1146 cylinderindex = get_cylinder_index(dive, ev);
1147 ev = get_next_gaschange(ev->next);
1149 set_cylinder_index(pi, i, cylinderindex, ~0u);
1152 /* for computers that track gas changes through events */
1153 static int count_gas_change_events(struct dive *dive)
1156 struct event *ev = get_next_gaschange(dive->events);
1160 ev = get_next_gaschange(ev->next);
1166 * Create a plot-info with smoothing and ranged min/max
1168 * This also makes sure that we have extra empty events on both
1169 * sides, so that you can do end-points without having to worry
1172 static struct plot_info *create_plot_info(struct dive *dive, int nr_samples, struct sample *dive_sample)
1174 int cylinderindex = -1;
1175 int lastdepth, lastindex;
1176 int i, pi_idx, nr, sec, cyl;
1178 struct plot_info *pi;
1179 pr_track_t *track_pr[MAX_CYLINDERS] = {NULL, };
1180 pr_track_t *pr_track, *current;
1181 gboolean missing_pr = FALSE;
1182 struct plot_data *entry = NULL;
1185 /* we want to potentially add synthetic plot_info elements for the gas changes */
1186 nr = nr_samples + 4 + 2 * count_gas_change_events(dive);
1187 alloc_size = plot_info_size(nr);
1188 pi = malloc(alloc_size);
1191 memset(pi, 0, alloc_size);
1193 pi_idx = 2; /* the two extra events at the start */
1194 /* check for gas changes before the samples start */
1195 ev = get_next_gaschange(dive->events);
1196 while (ev && ev->time.seconds < dive_sample->time.seconds) {
1197 entry = pi->entry + pi_idx;
1198 entry->sec = ev->time.seconds;
1199 entry->depth = 0; /* is that always correct ? */
1201 ev = get_next_gaschange(ev->next);
1203 if (ev && ev->time.seconds == dive_sample->time.seconds) {
1204 /* we already have a sample at the time of the event */
1205 ev = get_next_gaschange(ev->next);
1210 for (i = 0; i < nr_samples; i++) {
1213 struct sample *sample = dive_sample+i;
1215 entry = pi->entry + i + pi_idx;
1216 while (ev && ev->time.seconds < sample->time.seconds) {
1217 /* insert two fake plot info structures for the end of
1218 * the old tank and the start of the new tank */
1219 if (ev->time.seconds == sample->time.seconds - 1) {
1220 entry->sec = ev->time.seconds - 1;
1221 (entry+1)->sec = ev->time.seconds;
1223 entry->sec = ev->time.seconds;
1224 (entry+1)->sec = ev->time.seconds + 1;
1226 /* we need a fake depth - let's interpolate */
1228 entry->depth = sample->depth.mm -
1229 (sample->depth.mm - (sample-1)->depth.mm) / 2;
1231 entry->depth = sample->depth.mm;
1232 (entry+1)->depth = entry->depth;
1234 entry = pi->entry + i + pi_idx;
1235 ev = get_next_gaschange(ev->next);
1237 if (ev && ev->time.seconds == sample->time.seconds) {
1238 /* we already have a sample at the time of the event
1239 * just add a new one for the old tank and delay the
1240 * real even by one second (to keep time monotonous) */
1241 entry->sec = ev->time.seconds;
1242 entry->depth = sample->depth.mm;
1244 entry = pi->entry + i + pi_idx;
1245 ev = get_next_gaschange(ev->next);
1248 sec = entry->sec = sample->time.seconds + delay;
1249 depth = entry->depth = sample->depth.mm;
1250 entry->cylinderindex = sample->cylinderindex;
1251 SENSOR_PRESSURE(entry) = sample->cylinderpressure.mbar;
1252 entry->temperature = sample->temperature.mkelvin;
1254 if (depth || lastdepth)
1255 lastindex = i + pi_idx;
1258 if (depth > pi->maxdepth)
1259 pi->maxdepth = depth;
1261 entry = pi->entry + i + pi_idx;
1262 /* are there still unprocessed gas changes? that would be very strange */
1264 entry->sec = ev->time.seconds;
1265 entry->depth = 0; /* why are there gas changes after the dive is over? */
1267 entry = pi->entry + i + pi_idx;
1268 ev = get_next_gaschange(ev->next);
1270 nr = nr_samples + pi_idx - 2;
1271 check_gas_change_events(dive, pi);
1273 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) /* initialize the start pressures */
1274 track_pr[cyl] = pr_track_alloc(dive->cylinder[cyl].start.mbar, -1);
1275 current = track_pr[pi->entry[2].cylinderindex];
1276 for (i = 0; i < nr + 1; i++) {
1277 entry = pi->entry + i + 1;
1279 entry->same_cylinder = entry->cylinderindex == cylinderindex;
1280 cylinderindex = entry->cylinderindex;
1282 /* track the segments per cylinder and their pressure/time integral */
1283 if (!entry->same_cylinder) {
1284 current->end = SENSOR_PRESSURE(entry-1);
1285 current->t_end = (entry-1)->sec;
1286 current = pr_track_alloc(SENSOR_PRESSURE(entry), entry->sec);
1287 track_pr[cylinderindex] = list_add(track_pr[cylinderindex], current);
1288 } else { /* same cylinder */
1289 if ((!SENSOR_PRESSURE(entry) && SENSOR_PRESSURE(entry-1)) ||
1290 (SENSOR_PRESSURE(entry) && !SENSOR_PRESSURE(entry-1))) {
1291 /* transmitter changed its working status */
1292 current->end = SENSOR_PRESSURE(entry-1);
1293 current->t_end = (entry-1)->sec;
1294 current = pr_track_alloc(SENSOR_PRESSURE(entry), entry->sec);
1295 track_pr[cylinderindex] =
1296 list_add(track_pr[cylinderindex], current);
1299 /* finally, do the discrete integration to get the SAC rate equivalent */
1300 current->pressure_time += (entry->sec - (entry-1)->sec) *
1301 (1 + (entry->depth + (entry-1)->depth) / 20000.0);
1302 missing_pr |= !SENSOR_PRESSURE(entry);
1306 current->t_end = entry->sec;
1308 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) { /* initialize the end pressures */
1309 int pr = dive->cylinder[cyl].end.mbar;
1310 if (pr && track_pr[cyl]) {
1311 pr_track = list_last(track_pr[cyl]);
1315 /* Fill in the last two entries with empty values but valid times
1316 * without creating a false cylinder change event */
1318 pi->entry[i].sec = sec + 20;
1319 pi->entry[i].same_cylinder = 1;
1320 pi->entry[i].cylinderindex = pi->entry[i-1].cylinderindex;
1321 INTERPOLATED_PRESSURE(pi->entry + i) = GET_PRESSURE(pi->entry + i - 1);
1322 pi->entry[i+1].sec = sec + 40;
1323 pi->entry[i+1].same_cylinder = 1;
1324 pi->entry[i+1].cylinderindex = pi->entry[i-1].cylinderindex;
1325 INTERPOLATED_PRESSURE(pi->entry + i + 1) = GET_PRESSURE(pi->entry + i - 1);
1326 /* the number of actual entries - some computers have lots of
1327 * depth 0 samples at the end of a dive, we want to make sure
1328 * we have exactly one of them at the end */
1329 pi->nr = lastindex+1;
1330 while (pi->nr <= i+2 && pi->entry[pi->nr-1].depth > 0)
1332 pi->maxtime = pi->entry[lastindex].sec;
1334 /* Analyze_plot_info() will do the sample max pressures,
1335 * this handles the manual pressures
1337 pi->maxpressure = 0;
1338 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) {
1339 unsigned int mbar = dive->cylinder[cyl].start.mbar;
1340 if (mbar > pi->maxpressure)
1341 pi->maxpressure = mbar;
1344 pi->meandepth = dive->meandepth.mm;
1347 fill_missing_tank_pressures(dive, pi, track_pr);
1349 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++)
1350 list_free(track_pr[cyl]);
1351 if (0) /* awesome for debugging - not useful otherwise */
1353 return analyze_plot_info(pi);
1356 void plot(struct graphics_context *gc, cairo_rectangle_int_t *drawing_area, struct dive *dive)
1358 struct plot_info *pi;
1359 static struct sample fake[4];
1360 struct sample *sample = dive->sample;
1361 int nr = dive->samples;
1364 int duration = dive->duration.seconds;
1365 int maxdepth = dive->maxdepth.mm;
1367 fake[1].time.seconds = duration * 0.05;
1368 fake[1].depth.mm = maxdepth;
1369 fake[2].time.seconds = duration * 0.95;
1370 fake[2].depth.mm = maxdepth;
1371 fake[3].time.seconds = duration * 1.00;
1375 pi = create_plot_info(dive, nr, sample);
1377 cairo_translate(gc->cr, drawing_area->x, drawing_area->y);
1378 cairo_set_line_width(gc->cr, 1);
1379 cairo_set_line_cap(gc->cr, CAIRO_LINE_CAP_ROUND);
1380 cairo_set_line_join(gc->cr, CAIRO_LINE_JOIN_ROUND);
1383 * We can use "cairo_translate()" because that doesn't
1384 * scale line width etc. But the actual scaling we need
1385 * do set up ourselves..
1387 * Snif. What a pity.
1389 gc->maxx = (drawing_area->width - 2*drawing_area->x);
1390 gc->maxy = (drawing_area->height - 2*drawing_area->y);
1392 /* Temperature profile */
1393 plot_temperature_profile(gc, pi);
1396 plot_depth_profile(gc, pi);
1397 plot_events(gc, pi, dive);
1399 /* Cylinder pressure plot */
1400 plot_cylinder_pressure(gc, pi, dive);
1402 /* Text on top of all graphs.. */
1403 plot_temperature_text(gc, pi);
1404 plot_depth_text(gc, pi);
1405 plot_cylinder_pressure_text(gc, pi);
1407 /* Bounding box last */
1408 gc->leftx = 0; gc->rightx = 1.0;
1409 gc->topy = 0; gc->bottomy = 1.0;
1411 set_source_rgba(gc, BOUNDING_BOX);
1412 cairo_set_line_width(gc->cr, 1);
1417 cairo_close_path(gc->cr);
1418 cairo_stroke(gc->cr);