2 /* creates all the necessary data for drawing the dive profile
3 * uses cairo to draw it
16 int selected_dive = 0;
19 typedef enum { STABLE, SLOW, MODERATE, FAST, CRAZY } velocity_t;
21 /* Plot info with smoothing, velocity indication
22 * and one-, two- and three-minute minimums and maximums */
26 int meandepth, maxdepth;
30 unsigned int same_cylinder:1;
31 unsigned int cylinderindex;
33 /* pressure[0] is sensor pressure
34 * pressure[1] is interpolated pressure */
41 struct plot_data *min[3];
42 struct plot_data *max[3];
48 #define INTERPOLATED_PR 1
49 #define SENSOR_PRESSURE(_entry) (_entry)->pressure[SENSOR_PR]
50 #define INTERPOLATED_PRESSURE(_entry) (_entry)->pressure[INTERPOLATED_PR]
51 #define GET_PRESSURE(_entry) (SENSOR_PRESSURE(_entry) ? : INTERPOLATED_PRESSURE(_entry))
53 #define SAC_COLORS_START_IDX SAC_1
55 #define VELOCITY_COLORS_START_IDX VELO_STABLE
56 #define VELOCITY_COLORS 5
59 /* SAC colors. Order is important, the SAC_COLORS_START_IDX define above. */
60 SAC_1, SAC_2, SAC_3, SAC_4, SAC_5, SAC_6, SAC_7, SAC_8, SAC_9,
62 /* Velocity colors. Order is still important, ref VELOCITY_COLORS_START_IDX. */
63 VELO_STABLE, VELO_SLOW, VELO_MODERATE, VELO_FAST, VELO_CRAZY,
66 TEXT_BACKGROUND, ALERT_BG, ALERT_FG, EVENTS, SAMPLE_DEEP, SAMPLE_SHALLOW,
67 SMOOTHED, MINUTE, TIME_GRID, TIME_TEXT, DEPTH_GRID, MEAN_DEPTH, DEPTH_TOP,
68 DEPTH_BOTTOM, TEMP_TEXT, TEMP_PLOT, SAC_DEFAULT, BOUNDING_BOX, PRESSURE_TEXT, BACKGROUND
72 /* media[0] is screen, and media[1] is printer */
78 /* [color indice] = {{screen color, printer color}} */
79 static const color_t profile_color[] = {
80 [SAC_1] = {{FUNGREEN1, BLACK1_LOW_TRANS}},
81 [SAC_2] = {{APPLE1, BLACK1_LOW_TRANS}},
82 [SAC_3] = {{ATLANTIS1, BLACK1_LOW_TRANS}},
83 [SAC_4] = {{ATLANTIS2, BLACK1_LOW_TRANS}},
84 [SAC_5] = {{EARLSGREEN1, BLACK1_LOW_TRANS}},
85 [SAC_6] = {{HOKEYPOKEY1, BLACK1_LOW_TRANS}},
86 [SAC_7] = {{TUSCANY1, BLACK1_LOW_TRANS}},
87 [SAC_8] = {{CINNABAR1, BLACK1_LOW_TRANS}},
88 [SAC_9] = {{REDORANGE1, BLACK1_LOW_TRANS}},
90 [VELO_STABLE] = {{CAMARONE1, BLACK1_LOW_TRANS}},
91 [VELO_SLOW] = {{LIMENADE1, BLACK1_LOW_TRANS}},
92 [VELO_MODERATE] = {{RIOGRANDE1, BLACK1_LOW_TRANS}},
93 [VELO_FAST] = {{PIRATEGOLD1, BLACK1_LOW_TRANS}},
94 [VELO_CRAZY] = {{RED1, BLACK1_LOW_TRANS}},
96 [TEXT_BACKGROUND] = {{CONCRETE1_LOWER_TRANS, WHITE1}},
97 [ALERT_BG] = {{BROOM1_LOWER_TRANS, BLACK1_LOW_TRANS}},
98 [ALERT_FG] = {{BLACK1_LOW_TRANS, BLACK1_LOW_TRANS}},
99 [EVENTS] = {{REDORANGE1, BLACK1_LOW_TRANS}},
100 [SAMPLE_DEEP] = {{PERSIANRED1, BLACK1_LOW_TRANS}},
101 [SAMPLE_SHALLOW] = {{PERSIANRED1, BLACK1_LOW_TRANS}},
102 [SMOOTHED] = {{REDORANGE1_HIGH_TRANS, BLACK1_LOW_TRANS}},
103 [MINUTE] = {{MEDIUMREDVIOLET1_HIGHER_TRANS, BLACK1_LOW_TRANS}},
104 [TIME_GRID] = {{WHITE1, TUNDORA1_MED_TRANS}},
105 [TIME_TEXT] = {{FORESTGREEN1, BLACK1_LOW_TRANS}},
106 [DEPTH_GRID] = {{WHITE1, TUNDORA1_MED_TRANS}},
107 [MEAN_DEPTH] = {{REDORANGE1_MED_TRANS, BLACK1_LOW_TRANS}},
108 [DEPTH_BOTTOM] = {{GOVERNORBAY1_MED_TRANS, TUNDORA1_MED_TRANS}},
109 [DEPTH_TOP] = {{MERCURY1_MED_TRANS, WHITE1_MED_TRANS}},
110 [TEMP_TEXT] = {{GOVERNORBAY2, BLACK1_LOW_TRANS}},
111 [TEMP_PLOT] = {{ROYALBLUE2_LOW_TRANS, BLACK1_LOW_TRANS}},
112 [SAC_DEFAULT] = {{WHITE1, BLACK1_LOW_TRANS}},
113 [BOUNDING_BOX] = {{WHITE1, BLACK1_LOW_TRANS}},
114 [PRESSURE_TEXT] = {{KILLARNEY1, BLACK1_LOW_TRANS}},
115 [BACKGROUND] = {{SPRINGWOOD1, BLACK1_LOW_TRANS}},
118 #define plot_info_size(nr) (sizeof(struct plot_info) + (nr)*sizeof(struct plot_data))
120 /* Scale to 0,0 -> maxx,maxy */
121 #define SCALEX(gc,x) (((x)-gc->leftx)/(gc->rightx-gc->leftx)*gc->maxx)
122 #define SCALEY(gc,y) (((y)-gc->topy)/(gc->bottomy-gc->topy)*gc->maxy)
123 #define SCALE(gc,x,y) SCALEX(gc,x),SCALEY(gc,y)
125 static void move_to(struct graphics_context *gc, double x, double y)
127 cairo_move_to(gc->cr, SCALE(gc, x, y));
130 static void line_to(struct graphics_context *gc, double x, double y)
132 cairo_line_to(gc->cr, SCALE(gc, x, y));
135 static void set_source_rgba(struct graphics_context *gc, color_indice_t c)
137 const color_t *col = &profile_color[c];
138 struct rgba rgb = col->media[gc->printer];
144 cairo_set_source_rgba(gc->cr, r, g, b, a);
147 void init_profile_background(struct graphics_context *gc)
149 set_source_rgba(gc, BACKGROUND);
152 void pattern_add_color_stop_rgba(struct graphics_context *gc, cairo_pattern_t *pat, double o, color_indice_t c)
154 const color_t *col = &profile_color[c];
155 struct rgba rgb = col->media[gc->printer];
156 cairo_pattern_add_color_stop_rgba(pat, o, rgb.r, rgb.g, rgb.b, rgb.a);
159 #define ROUND_UP(x,y) ((((x)+(y)-1)/(y))*(y))
161 /* debugging tool - not normally used */
162 static void dump_pi (struct plot_info *pi)
166 printf("pi:{nr:%d maxtime:%d meandepth:%d maxdepth:%d \n"
167 " maxpressure:%d mintemp:%d maxtemp:%d\n",
168 pi->nr, pi->maxtime, pi->meandepth, pi->maxdepth,
169 pi->maxpressure, pi->mintemp, pi->maxtemp);
170 for (i = 0; i < pi->nr; i++)
171 printf(" entry[%d]:{same_cylinder:%d cylinderindex:%d sec:%d pressure:{%d,%d}\n"
172 " time:%d:%02d temperature:%d depth:%d smoothed:%d}\n",
173 i, pi->entry[i].same_cylinder, pi->entry[i].cylinderindex, pi->entry[i].sec,
174 pi->entry[i].pressure[0], pi->entry[i].pressure[1],
175 pi->entry[i].sec / 60, pi->entry[i].sec % 60,
176 pi->entry[i].temperature, pi->entry[i].depth, pi->entry[i].smoothed);
181 * When showing dive profiles, we scale things to the
182 * current dive. However, we don't scale past less than
183 * 30 minutes or 90 ft, just so that small dives show
184 * up as such unless zoom is enabled.
185 * We also need to add 180 seconds at the end so the min/max
188 static int get_maxtime(struct plot_info *pi)
190 int seconds = pi->maxtime;
192 /* Rounded up to one minute, with at least 2.5 minutes to
194 * For dive times shorter than 10 minutes, we use seconds/4 to
195 * calculate the space dynamically.
196 * This is seamless since 600/4 = 150.
199 return ROUND_UP(seconds+seconds/4, 60);
201 return ROUND_UP(seconds+150, 60);
203 /* min 30 minutes, rounded up to 5 minutes, with at least 2.5 minutes to spare */
204 return MAX(30*60, ROUND_UP(seconds+150, 60*5));
208 static int get_maxdepth(struct plot_info *pi)
210 unsigned mm = pi->maxdepth;
212 /* Rounded up to 10m, with at least 3m to spare */
213 return ROUND_UP(mm+3000, 10000);
215 /* Minimum 30m, rounded up to 10m, with at least 3m to spare */
216 return MAX(30000, ROUND_UP(mm+3000, 10000));
222 color_indice_t color;
224 } text_render_options_t;
227 #define CENTER (-0.5)
234 static void plot_text(struct graphics_context *gc, const text_render_options_t *tro,
235 double x, double y, const char *fmt, ...)
237 cairo_t *cr = gc->cr;
238 cairo_font_extents_t fe;
239 cairo_text_extents_t extents;
245 vsnprintf(buffer, sizeof(buffer), fmt, args);
248 cairo_set_font_size(cr, tro->size);
249 cairo_font_extents(cr, &fe);
250 cairo_text_extents(cr, buffer, &extents);
251 dx = tro->hpos * extents.width + extents.x_bearing;
252 dy = tro->vpos * extents.height + fe.descent;
255 cairo_rel_move_to(cr, dx, dy);
257 cairo_text_path(cr, buffer);
258 set_source_rgba(gc, TEXT_BACKGROUND);
262 cairo_rel_move_to(cr, dx, dy);
264 set_source_rgba(gc, tro->color);
265 cairo_show_text(cr, buffer);
272 static struct ev_select *ev_namelist;
273 static int evn_allocated;
276 void evn_foreach(void (*callback)(const char *, int *, void *), void *data)
280 for (i = 0; i < evn_used; i++) {
281 callback(ev_namelist[i].ev_name, &ev_namelist[i].plot_ev, data);
285 void remember_event(const char *eventname)
289 if (!eventname || (len = strlen(eventname)) == 0)
291 while (i < evn_used) {
292 if (!strncmp(eventname,ev_namelist[i].ev_name,len))
296 if (evn_used == evn_allocated) {
298 ev_namelist = realloc(ev_namelist, evn_allocated * sizeof(struct ev_select));
300 /* we are screwed, but let's just bail out */
303 ev_namelist[evn_used].ev_name = strdup(eventname);
304 ev_namelist[evn_used].plot_ev = TRUE;
308 static void plot_one_event(struct graphics_context *gc, struct plot_info *pi, struct event *event, const text_render_options_t *tro)
313 /* is plotting this event disabled? */
315 for (i = 0; i < evn_used; i++) {
316 if (! strcmp(event->name, ev_namelist[i].ev_name)) {
317 if (ev_namelist[i].plot_ev)
324 for (i = 0; i < pi->nr; i++) {
325 struct plot_data *data = pi->entry + i;
326 if (event->time.seconds < data->sec)
330 /* draw a little tirangular marker and attach tooltip */
331 x = SCALEX(gc, event->time.seconds);
332 y = SCALEY(gc, depth);
333 set_source_rgba(gc, ALERT_BG);
334 cairo_move_to(gc->cr, x-15, y+6);
335 cairo_line_to(gc->cr, x-3 , y+6);
336 cairo_line_to(gc->cr, x-9, y-6);
337 cairo_line_to(gc->cr, x-15, y+6);
338 cairo_stroke_preserve(gc->cr);
340 set_source_rgba(gc, ALERT_FG);
341 cairo_move_to(gc->cr, x-9, y-3);
342 cairo_line_to(gc->cr, x-9, y+1);
343 cairo_move_to(gc->cr, x-9, y+4);
344 cairo_line_to(gc->cr, x-9, y+4);
345 cairo_stroke(gc->cr);
346 attach_tooltip(x-15, y-6, 12, 12, event->name);
349 static void plot_events(struct graphics_context *gc, struct plot_info *pi, struct dive *dive)
351 static const text_render_options_t tro = {14, EVENTS, CENTER, TOP};
352 struct event *event = dive->events;
358 plot_one_event(gc, pi, event, &tro);
363 static void render_depth_sample(struct graphics_context *gc, struct plot_data *entry, const text_render_options_t *tro)
365 int sec = entry->sec, decimals;
368 d = get_depth_units(entry->depth, &decimals, NULL);
370 plot_text(gc, tro, sec, entry->depth, "%.*f", decimals, d);
373 static void plot_text_samples(struct graphics_context *gc, struct plot_info *pi)
375 static const text_render_options_t deep = {14, SAMPLE_DEEP, CENTER, TOP};
376 static const text_render_options_t shallow = {14, SAMPLE_SHALLOW, CENTER, BOTTOM};
380 for (i = 0; i < pi->nr; i++) {
381 struct plot_data *entry = pi->entry + i;
383 if (entry->depth < 2000)
386 if ((entry == entry->max[2]) && entry->depth != last) {
387 render_depth_sample(gc, entry, &deep);
391 if ((entry == entry->min[2]) && entry->depth != last) {
392 render_depth_sample(gc, entry, &shallow);
396 if (entry->depth != last)
401 static void plot_depth_text(struct graphics_context *gc, struct plot_info *pi)
403 int maxtime, maxdepth;
405 /* Get plot scaling limits */
406 maxtime = get_maxtime(pi);
407 maxdepth = get_maxdepth(pi);
409 gc->leftx = 0; gc->rightx = maxtime;
410 gc->topy = 0; gc->bottomy = maxdepth;
412 plot_text_samples(gc, pi);
415 static void plot_smoothed_profile(struct graphics_context *gc, struct plot_info *pi)
418 struct plot_data *entry = pi->entry;
420 set_source_rgba(gc, SMOOTHED);
421 move_to(gc, entry->sec, entry->smoothed);
422 for (i = 1; i < pi->nr; i++) {
424 line_to(gc, entry->sec, entry->smoothed);
426 cairo_stroke(gc->cr);
429 static void plot_minmax_profile_minute(struct graphics_context *gc, struct plot_info *pi,
433 struct plot_data *entry = pi->entry;
435 set_source_rgba(gc, MINUTE);
436 move_to(gc, entry->sec, entry->min[index]->depth);
437 for (i = 1; i < pi->nr; i++) {
439 line_to(gc, entry->sec, entry->min[index]->depth);
441 for (i = 1; i < pi->nr; i++) {
442 line_to(gc, entry->sec, entry->max[index]->depth);
445 cairo_close_path(gc->cr);
449 static void plot_minmax_profile(struct graphics_context *gc, struct plot_info *pi)
453 plot_minmax_profile_minute(gc, pi, 2);
454 plot_minmax_profile_minute(gc, pi, 1);
455 plot_minmax_profile_minute(gc, pi, 0);
458 static void plot_depth_profile(struct graphics_context *gc, struct plot_info *pi)
461 cairo_t *cr = gc->cr;
463 struct plot_data *entry;
464 int maxtime, maxdepth, marker;
465 int increments[8] = { 10, 20, 30, 60, 5*60, 10*60, 15*60, 30*60 };
467 /* Get plot scaling limits */
468 maxtime = get_maxtime(pi);
469 maxdepth = get_maxdepth(pi);
471 /* Time markers: at most every 5 min, but no more than 12 markers.
472 * We start out with 10 seconds and increment up to 30 minutes,
473 * depending on the dive time.
474 * This allows for 6h dives - enough (I hope) for even the craziest
475 * divers - but just in case, for those 8h depth-record-breaking dives,
476 * we double the interval if this still doesn't get us to 12 or fewer
479 while (maxtime / increments[i] > 12 && i < 8)
481 incr = increments[i];
482 while (maxtime / incr > 12)
485 gc->leftx = 0; gc->rightx = maxtime;
486 gc->topy = 0; gc->bottomy = 1.0;
487 set_source_rgba(gc, TIME_GRID);
488 cairo_set_line_width(gc->cr, 2);
490 for (i = incr; i < maxtime; i += incr) {
496 /* now the text on the time markers */
497 text_render_options_t tro = {10, TIME_TEXT, CENTER, TOP};
499 /* Be a bit more verbose with shorter dives */
500 for (i = incr; i < maxtime; i += incr)
501 plot_text(gc, &tro, i, 1, "%d:%d", i/60, i%60);
503 /* Only render the time on every second marker for normal dives */
504 for (i = incr; i < maxtime; i += 2 * incr)
505 plot_text(gc, &tro, i, 1, "%d", i/60);
507 /* Depth markers: every 30 ft or 10 m*/
508 gc->leftx = 0; gc->rightx = 1.0;
509 gc->topy = 0; gc->bottomy = maxdepth;
510 switch (output_units.length) {
511 case METERS: marker = 10000; break;
512 case FEET: marker = 9144; break; /* 30 ft */
515 set_source_rgba(gc, DEPTH_GRID);
516 for (i = marker; i < maxdepth; i += marker) {
522 /* Show mean depth */
524 set_source_rgba(gc, MEAN_DEPTH);
525 move_to(gc, 0, pi->meandepth);
526 line_to(gc, 1, pi->meandepth);
530 gc->leftx = 0; gc->rightx = maxtime;
533 * These are good for debugging text placement etc,
534 * but not for actual display..
537 plot_smoothed_profile(gc, pi);
538 plot_minmax_profile(gc, pi);
541 /* Do the depth profile for the neat fill */
542 gc->topy = 0; gc->bottomy = maxdepth;
544 cairo_pattern_t *pat;
545 pat = cairo_pattern_create_linear (0.0, 0.0, 0.0, 256.0);
546 pattern_add_color_stop_rgba (gc, pat, 1, DEPTH_BOTTOM);
547 pattern_add_color_stop_rgba (gc, pat, 0, DEPTH_TOP);
549 cairo_set_source(gc->cr, pat);
550 cairo_pattern_destroy(pat);
551 cairo_set_line_width(gc->cr, 2);
555 for (i = 0; i < pi->nr; i++, entry++)
556 line_to(gc, entry->sec, entry->depth);
557 cairo_close_path(gc->cr);
561 /* Now do it again for the velocity colors */
563 for (i = 1; i < pi->nr; i++) {
566 /* we want to draw the segments in different colors
567 * representing the vertical velocity, so we need to
568 * chop this into short segments */
569 depth = entry->depth;
570 set_source_rgba(gc, VELOCITY_COLORS_START_IDX + entry->velocity);
571 move_to(gc, entry[-1].sec, entry[-1].depth);
572 line_to(gc, sec, depth);
577 static int setup_temperature_limits(struct graphics_context *gc, struct plot_info *pi)
579 int maxtime, mintemp, maxtemp, delta;
581 /* Get plot scaling limits */
582 maxtime = get_maxtime(pi);
583 mintemp = pi->mintemp;
584 maxtemp = pi->maxtemp;
586 gc->leftx = 0; gc->rightx = maxtime;
587 /* Show temperatures in roughly the lower third, but make sure the scale
588 is at least somewhat reasonable */
589 delta = maxtemp - mintemp;
590 if (delta > 3000) { /* more than 3K in fluctuation */
591 gc->topy = maxtemp + delta*2;
592 gc->bottomy = mintemp - delta/2;
594 gc->topy = maxtemp + 1500 + delta*2;
595 gc->bottomy = mintemp - delta/2;
598 return maxtemp > mintemp;
601 static void plot_single_temp_text(struct graphics_context *gc, int sec, int mkelvin)
605 static const text_render_options_t tro = {12, TEMP_TEXT, LEFT, TOP};
607 deg = get_temp_units(mkelvin, &unit);
609 plot_text(gc, &tro, sec, mkelvin, "%d%s", (int)(deg + 0.5), unit);
612 static void plot_temperature_text(struct graphics_context *gc, struct plot_info *pi)
615 int last = -300, sec = 0;
616 int last_temperature = 0, last_printed_temp = 0;
618 if (!setup_temperature_limits(gc, pi))
621 for (i = 0; i < pi->nr; i++) {
622 struct plot_data *entry = pi->entry+i;
623 int mkelvin = entry->temperature;
627 last_temperature = mkelvin;
629 /* don't print a temperature
630 * if it's been less than 5min and less than a 2K change OR
631 * if it's been less than 2min OR if the change from the
632 * last print is less than .4K (and therefore less than 1F */
633 if (((sec < last + 300) && (abs(mkelvin - last_printed_temp) < 2000)) ||
634 (sec < last + 120) ||
635 (abs(mkelvin - last_printed_temp) < 400))
638 plot_single_temp_text(gc,sec,mkelvin);
639 last_printed_temp = mkelvin;
641 /* it would be nice to print the end temperature, if it's
642 * different or if the last temperature print has been more
643 * than a quarter of the dive back */
644 if ((abs(last_temperature - last_printed_temp) > 500) ||
645 ((double)last / (double)sec < 0.75))
646 plot_single_temp_text(gc, sec, last_temperature);
649 static void plot_temperature_profile(struct graphics_context *gc, struct plot_info *pi)
652 cairo_t *cr = gc->cr;
655 if (!setup_temperature_limits(gc, pi))
658 cairo_set_line_width(gc->cr, 2);
659 set_source_rgba(gc, TEMP_PLOT);
660 for (i = 0; i < pi->nr; i++) {
661 struct plot_data *entry = pi->entry + i;
662 int mkelvin = entry->temperature;
663 int sec = entry->sec;
670 line_to(gc, sec, mkelvin);
672 move_to(gc, sec, mkelvin);
678 /* gets both the actual start and end pressure as well as the scaling factors */
679 static int get_cylinder_pressure_range(struct graphics_context *gc, struct plot_info *pi)
682 gc->rightx = get_maxtime(pi);
684 gc->bottomy = 0; gc->topy = pi->maxpressure * 1.5;
685 return pi->maxpressure != 0;
688 /* set the color for the pressure plot according to temporary sac rate
689 * as compared to avg_sac; the calculation simply maps the delta between
690 * sac and avg_sac to indexes 0 .. (SAC_COLORS - 1) with everything
691 * more than 6000 ml/min below avg_sac mapped to 0 */
693 static void set_sac_color(struct graphics_context *gc, int sac, int avg_sac)
696 int delta = sac - avg_sac + 7000;
699 sac_index = delta / 2000;
702 if (sac_index > SAC_COLORS - 1)
703 sac_index = SAC_COLORS - 1;
704 set_source_rgba(gc, SAC_COLORS_START_IDX + sac_index);
706 set_source_rgba(gc, SAC_DEFAULT);
710 /* calculate the current SAC in ml/min and convert to int */
711 #define GET_LOCAL_SAC(_entry1, _entry2, _dive) (int) \
712 ((GET_PRESSURE((_entry1)) - GET_PRESSURE((_entry2))) * \
713 (_dive)->cylinder[(_entry1)->cylinderindex].type.size.mliter / \
714 (((_entry2)->sec - (_entry1)->sec) / 60.0) / \
715 (1 + ((_entry1)->depth + (_entry2)->depth) / 20000.0) / \
718 #define SAC_WINDOW 45 /* sliding window in seconds for current SAC calculation */
720 static void plot_cylinder_pressure(struct graphics_context *gc, struct plot_info *pi,
725 int lift_pen = FALSE;
726 int first_plot = TRUE;
728 struct plot_data *last_entry = NULL;
730 if (!get_cylinder_pressure_range(gc, pi))
733 cairo_set_line_width(gc->cr, 2);
735 for (i = 0; i < pi->nr; i++) {
737 struct plot_data *entry = pi->entry + i;
739 mbar = GET_PRESSURE(entry);
740 if (!entry->same_cylinder) {
751 sac = GET_LOCAL_SAC(entry, pi->entry + i + 1, dive);
755 for (j = last; j < i; j++)
756 sac += GET_LOCAL_SAC(pi->entry + j, pi->entry + j + 1, dive);
758 if (entry->sec - last_entry->sec >= SAC_WINDOW) {
760 last_entry = pi->entry + last;
763 set_sac_color(gc, sac, dive->sac);
765 if (!first_plot && entry->same_cylinder) {
766 /* if we have a previous event from the same tank,
767 * draw at least a short line */
769 prev_pr = GET_PRESSURE(entry - 1);
770 move_to(gc, (entry-1)->sec, prev_pr);
771 line_to(gc, entry->sec, mbar);
774 move_to(gc, entry->sec, mbar);
778 line_to(gc, entry->sec, mbar);
780 cairo_stroke(gc->cr);
781 move_to(gc, entry->sec, mbar);
785 static void plot_pressure_value(struct graphics_context *gc, int mbar, int sec,
786 int xalign, int yalign)
791 pressure = get_pressure_units(mbar, &unit);
792 text_render_options_t tro = {10, PRESSURE_TEXT, xalign, yalign};
793 plot_text(gc, &tro, sec, mbar, "%d %s", pressure, unit);
796 static void plot_cylinder_pressure_text(struct graphics_context *gc, struct plot_info *pi)
800 int seen_cyl[MAX_CYLINDERS] = { FALSE, };
801 int last_pressure[MAX_CYLINDERS] = { 0, };
802 int last_time[MAX_CYLINDERS] = { 0, };
803 struct plot_data *entry;
805 if (!get_cylinder_pressure_range(gc, pi))
808 /* only loop over the actual events from the dive computer
809 * plus the second synthetic event at the start (to make sure
810 * we get "time=0" right)
811 * sadly with a recent change that first entry may no longer
812 * have any pressure reading - in that case just grab the
813 * pressure from the second entry */
814 if (GET_PRESSURE(pi->entry + 1) == 0 && GET_PRESSURE(pi->entry + 2) !=0)
815 INTERPOLATED_PRESSURE(pi->entry + 1) = GET_PRESSURE(pi->entry + 2);
816 for (i = 1; i < pi->nr; i++) {
817 entry = pi->entry + i;
819 if (!entry->same_cylinder) {
820 cyl = entry->cylinderindex;
821 if (!seen_cyl[cyl]) {
822 mbar = GET_PRESSURE(entry);
823 plot_pressure_value(gc, mbar, entry->sec, LEFT, BOTTOM);
824 seen_cyl[cyl] = TRUE;
827 /* remember the last pressure and time of
828 * the previous cylinder */
829 cyl = (entry - 1)->cylinderindex;
830 last_pressure[cyl] = GET_PRESSURE(entry - 1);
831 last_time[cyl] = (entry - 1)->sec;
835 cyl = entry->cylinderindex;
836 if (GET_PRESSURE(entry))
837 last_pressure[cyl] = GET_PRESSURE(entry);
838 last_time[cyl] = entry->sec;
840 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) {
841 if (last_time[cyl]) {
842 plot_pressure_value(gc, last_pressure[cyl], last_time[cyl], CENTER, TOP);
847 static void analyze_plot_info_minmax_minute(struct plot_data *entry, struct plot_data *first, struct plot_data *last, int index)
849 struct plot_data *p = entry;
850 int time = entry->sec;
851 int seconds = 90*(index+1);
852 struct plot_data *min, *max;
855 /* Go back 'seconds' in time */
857 if (p[-1].sec < time - seconds)
862 /* Then go forward until we hit an entry past the time */
867 int depth = p->depth;
868 if (p->sec > time + seconds)
872 if (depth < min->depth)
874 if (depth > max->depth)
877 entry->min[index] = min;
878 entry->max[index] = max;
879 entry->avg[index] = (avg + nr/2) / nr;
882 static void analyze_plot_info_minmax(struct plot_data *entry, struct plot_data *first, struct plot_data *last)
884 analyze_plot_info_minmax_minute(entry, first, last, 0);
885 analyze_plot_info_minmax_minute(entry, first, last, 1);
886 analyze_plot_info_minmax_minute(entry, first, last, 2);
889 static velocity_t velocity(int speed)
893 if (speed < -304) /* ascent faster than -60ft/min */
895 else if (speed < -152) /* above -30ft/min */
897 else if (speed < -76) /* -15ft/min */
899 else if (speed < -25) /* -5ft/min */
901 else if (speed < 25) /* very hard to find data, but it appears that the recommendations
902 for descent are usually about 2x ascent rate; still, we want
903 stable to mean stable */
905 else if (speed < 152) /* between 5 and 30ft/min is considered slow */
907 else if (speed < 304) /* up to 60ft/min is moderate */
909 else if (speed < 507) /* up to 100ft/min is fast */
911 else /* more than that is just crazy - you'll blow your ears out */
916 static struct plot_info *analyze_plot_info(struct plot_info *pi)
921 /* Do pressure min/max based on the non-surface data */
922 for (i = 0; i < nr; i++) {
923 struct plot_data *entry = pi->entry+i;
924 int pressure = GET_PRESSURE(entry);
925 int temperature = entry->temperature;
928 if (pressure > pi->maxpressure)
929 pi->maxpressure = pressure;
933 if (!pi->mintemp || temperature < pi->mintemp)
934 pi->mintemp = temperature;
935 if (temperature > pi->maxtemp)
936 pi->maxtemp = temperature;
940 /* Smoothing function: 5-point triangular smooth */
941 for (i = 2; i < nr; i++) {
942 struct plot_data *entry = pi->entry+i;
946 depth = entry[-2].depth + 2*entry[-1].depth + 3*entry[0].depth + 2*entry[1].depth + entry[2].depth;
947 entry->smoothed = (depth+4) / 9;
949 /* vertical velocity in mm/sec */
950 /* Linus wants to smooth this - let's at least look at the samples that aren't FAST or CRAZY */
951 if (entry[0].sec - entry[-1].sec) {
952 entry->velocity = velocity((entry[0].depth - entry[-1].depth) / (entry[0].sec - entry[-1].sec));
953 /* if our samples are short and we aren't too FAST*/
954 if (entry[0].sec - entry[-1].sec < 15 && entry->velocity < FAST) {
956 while (i+past > 0 && entry[0].sec - entry[past].sec < 15)
958 entry->velocity = velocity((entry[0].depth - entry[past].depth) /
959 (entry[0].sec - entry[past].sec));
962 entry->velocity = STABLE;
965 /* One-, two- and three-minute minmax data */
966 for (i = 0; i < nr; i++) {
967 struct plot_data *entry = pi->entry +i;
968 analyze_plot_info_minmax(entry, pi->entry, pi->entry+nr);
975 * simple structure to track the beginning and end tank pressure as
976 * well as the integral of depth over time spent while we have no
977 * pressure reading from the tank */
978 typedef struct pr_track_struct pr_track_t;
979 struct pr_track_struct {
984 double pressure_time;
988 static pr_track_t *pr_track_alloc(int start, int t_start) {
989 pr_track_t *pt = malloc(sizeof(pr_track_t));
991 pt->t_start = t_start;
994 pt->pressure_time = 0.0;
999 /* poor man's linked list */
1000 static pr_track_t *list_last(pr_track_t *list)
1002 pr_track_t *tail = list;
1005 while (tail->next) {
1011 static pr_track_t *list_add(pr_track_t *list, pr_track_t *element)
1013 pr_track_t *tail = list_last(list);
1016 tail->next = element;
1020 static void list_free(pr_track_t *list)
1024 list_free(list->next);
1028 static void dump_pr_track(pr_track_t **track_pr)
1033 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) {
1034 list = track_pr[cyl];
1036 printf("cyl%d: start %d end %d t_start %d t_end %d pt %6.3f\n", cyl,
1037 list->start, list->end, list->t_start, list->t_end, list->pressure_time);
1043 static void fill_missing_tank_pressures(struct plot_info *pi, pr_track_t **track_pr)
1045 pr_track_t *list = NULL;
1046 pr_track_t *nlist = NULL;
1049 struct plot_data *entry;
1050 int cur_pr[MAX_CYLINDERS];
1053 /* another great debugging tool */
1054 dump_pr_track(track_pr);
1056 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) {
1057 cur_pr[cyl] = track_pr[cyl]->start;
1060 /* The first two are "fillers", but in case we don't have a sample
1061 * at time 0 we need to process the second of them here */
1062 for (i = 1; i < pi->nr; i++) {
1063 entry = pi->entry + i;
1064 if (SENSOR_PRESSURE(entry)) {
1065 cur_pr[entry->cylinderindex] = SENSOR_PRESSURE(entry);
1067 if(!list || list->t_end < entry->sec) {
1068 nlist = track_pr[entry->cylinderindex];
1070 while (nlist && nlist->t_start <= entry->sec) {
1074 /* there may be multiple segments - so
1075 * let's assemble the length */
1077 pt = list->pressure_time;
1078 while (!nlist->end) {
1079 nlist = nlist->next;
1081 /* oops - we have no end pressure,
1082 * so this means this is a tank without
1083 * gas consumption information */
1086 pt += nlist->pressure_time;
1089 /* just continue without calculating
1090 * interpolated values */
1091 INTERPOLATED_PRESSURE(entry) = cur_pr[entry->cylinderindex];
1095 magic = (nlist->end - cur_pr[entry->cylinderindex]) / pt;
1098 double cur_pt = (entry->sec - (entry-1)->sec) *
1099 (1 + (entry->depth + (entry-1)->depth) / 20000.0);
1100 INTERPOLATED_PRESSURE(entry) =
1101 cur_pr[entry->cylinderindex] + cur_pt * magic + 0.5;
1102 cur_pr[entry->cylinderindex] = INTERPOLATED_PRESSURE(entry);
1104 INTERPOLATED_PRESSURE(entry) = cur_pr[entry->cylinderindex];
1109 static int get_cylinder_index(struct dive *dive, struct event *ev)
1114 * Try to find a cylinder that matches the O2 percentage
1115 * in the gas change event 'value' field.
1117 * Crazy suunto gas change events. We really should do
1118 * this in libdivecomputer or something.
1120 for (i = 0; i < MAX_CYLINDERS; i++) {
1121 cylinder_t *cyl = dive->cylinder+i;
1122 int o2 = (cyl->gasmix.o2.permille + 5) / 10;
1123 if (o2 == ev->value)
1130 static struct event *get_next_gaschange(struct event *event)
1133 if (!strcmp(event->name, "gaschange"))
1135 event = event->next;
1140 static int set_cylinder_index(struct plot_info *pi, int i, int cylinderindex, unsigned int end)
1142 while (i < pi->nr) {
1143 struct plot_data *entry = pi->entry+i;
1144 if (entry->sec > end)
1146 if (entry->cylinderindex != cylinderindex) {
1147 entry->cylinderindex = cylinderindex;
1148 entry->pressure[0] = 0;
1155 static void check_gas_change_events(struct dive *dive, struct plot_info *pi)
1157 int i = 0, cylinderindex = 0;
1158 struct event *ev = get_next_gaschange(dive->events);
1164 i = set_cylinder_index(pi, i, cylinderindex, ev->time.seconds);
1165 cylinderindex = get_cylinder_index(dive, ev);
1166 ev = get_next_gaschange(ev->next);
1168 set_cylinder_index(pi, i, cylinderindex, ~0u);
1171 /* for computers that track gas changes through events */
1172 static int count_gas_change_events(struct dive *dive)
1175 struct event *ev = get_next_gaschange(dive->events);
1179 ev = get_next_gaschange(ev->next);
1185 * Create a plot-info with smoothing and ranged min/max
1187 * This also makes sure that we have extra empty events on both
1188 * sides, so that you can do end-points without having to worry
1191 static struct plot_info *create_plot_info(struct dive *dive, int nr_samples, struct sample *dive_sample)
1193 int cylinderindex = -1;
1194 int lastdepth, lastindex;
1195 int i, pi_idx, nr, sec, cyl;
1197 struct plot_info *pi;
1198 pr_track_t *track_pr[MAX_CYLINDERS] = {NULL, };
1199 pr_track_t *pr_track, *current;
1200 gboolean missing_pr = FALSE;
1201 struct plot_data *entry = NULL;
1204 /* we want to potentially add synthetic plot_info elements for the gas changes */
1205 nr = nr_samples + 4 + 2 * count_gas_change_events(dive);
1206 alloc_size = plot_info_size(nr);
1207 pi = malloc(alloc_size);
1210 memset(pi, 0, alloc_size);
1212 pi_idx = 2; /* the two extra events at the start */
1213 /* check for gas changes before the samples start */
1214 ev = get_next_gaschange(dive->events);
1215 while (ev && ev->time.seconds < dive_sample->time.seconds) {
1216 entry = pi->entry + pi_idx;
1217 entry->sec = ev->time.seconds;
1218 entry->depth = 0; /* is that always correct ? */
1220 ev = get_next_gaschange(ev->next);
1222 if (ev && ev->time.seconds == dive_sample->time.seconds) {
1223 /* we already have a sample at the time of the event */
1224 ev = get_next_gaschange(ev->next);
1229 for (i = 0; i < nr_samples; i++) {
1232 struct sample *sample = dive_sample+i;
1234 entry = pi->entry + i + pi_idx;
1235 while (ev && ev->time.seconds < sample->time.seconds) {
1236 /* insert two fake plot info structures for the end of
1237 * the old tank and the start of the new tank */
1238 if (ev->time.seconds == sample->time.seconds - 1) {
1239 entry->sec = ev->time.seconds - 1;
1240 (entry+1)->sec = ev->time.seconds;
1242 entry->sec = ev->time.seconds;
1243 (entry+1)->sec = ev->time.seconds + 1;
1245 /* we need a fake depth - let's interpolate */
1247 entry->depth = sample->depth.mm -
1248 (sample->depth.mm - (sample-1)->depth.mm) / 2;
1250 entry->depth = sample->depth.mm;
1251 (entry+1)->depth = entry->depth;
1253 entry = pi->entry + i + pi_idx;
1254 ev = get_next_gaschange(ev->next);
1256 if (ev && ev->time.seconds == sample->time.seconds) {
1257 /* we already have a sample at the time of the event
1258 * just add a new one for the old tank and delay the
1259 * real even by one second (to keep time monotonous) */
1260 entry->sec = ev->time.seconds;
1261 entry->depth = sample->depth.mm;
1263 entry = pi->entry + i + pi_idx;
1264 ev = get_next_gaschange(ev->next);
1267 sec = entry->sec = sample->time.seconds + delay;
1268 depth = entry->depth = sample->depth.mm;
1269 entry->cylinderindex = sample->cylinderindex;
1270 SENSOR_PRESSURE(entry) = sample->cylinderpressure.mbar;
1271 entry->temperature = sample->temperature.mkelvin;
1273 if (depth || lastdepth)
1274 lastindex = i + pi_idx;
1277 if (depth > pi->maxdepth)
1278 pi->maxdepth = depth;
1280 entry = pi->entry + i + pi_idx;
1281 /* are there still unprocessed gas changes? that would be very strange */
1283 entry->sec = ev->time.seconds;
1284 entry->depth = 0; /* why are there gas changes after the dive is over? */
1286 entry = pi->entry + i + pi_idx;
1287 ev = get_next_gaschange(ev->next);
1289 nr = nr_samples + pi_idx - 2;
1290 check_gas_change_events(dive, pi);
1292 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) /* initialize the start pressures */
1293 track_pr[cyl] = pr_track_alloc(dive->cylinder[cyl].start.mbar, -1);
1294 current = track_pr[pi->entry[2].cylinderindex];
1295 for (i = 0; i < nr + 1; i++) {
1296 entry = pi->entry + i + 1;
1298 entry->same_cylinder = entry->cylinderindex == cylinderindex;
1299 cylinderindex = entry->cylinderindex;
1301 /* track the segments per cylinder and their pressure/time integral */
1302 if (!entry->same_cylinder) {
1303 current->end = SENSOR_PRESSURE(entry-1);
1304 current->t_end = (entry-1)->sec;
1305 current = pr_track_alloc(SENSOR_PRESSURE(entry), entry->sec);
1306 track_pr[cylinderindex] = list_add(track_pr[cylinderindex], current);
1307 } else { /* same cylinder */
1308 if ((!SENSOR_PRESSURE(entry) && SENSOR_PRESSURE(entry-1)) ||
1309 (SENSOR_PRESSURE(entry) && !SENSOR_PRESSURE(entry-1))) {
1310 /* transmitter changed its working status */
1311 current->end = SENSOR_PRESSURE(entry-1);
1312 current->t_end = (entry-1)->sec;
1313 current = pr_track_alloc(SENSOR_PRESSURE(entry), entry->sec);
1314 track_pr[cylinderindex] =
1315 list_add(track_pr[cylinderindex], current);
1318 /* finally, do the discrete integration to get the SAC rate equivalent */
1319 current->pressure_time += (entry->sec - (entry-1)->sec) *
1320 (1 + (entry->depth + (entry-1)->depth) / 20000.0);
1321 missing_pr |= !SENSOR_PRESSURE(entry);
1325 current->t_end = entry->sec;
1327 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) { /* initialize the end pressures */
1328 int pr = dive->cylinder[cyl].end.mbar;
1329 if (pr && track_pr[cyl]) {
1330 pr_track = list_last(track_pr[cyl]);
1334 /* Fill in the last two entries with empty values but valid times
1335 * without creating a false cylinder change event */
1337 pi->entry[i].sec = sec + 20;
1338 pi->entry[i].same_cylinder = 1;
1339 pi->entry[i].cylinderindex = pi->entry[i-1].cylinderindex;
1340 INTERPOLATED_PRESSURE(pi->entry + i) = GET_PRESSURE(pi->entry + i - 1);
1341 pi->entry[i+1].sec = sec + 40;
1342 pi->entry[i+1].same_cylinder = 1;
1343 pi->entry[i+1].cylinderindex = pi->entry[i-1].cylinderindex;
1344 INTERPOLATED_PRESSURE(pi->entry + i + 1) = GET_PRESSURE(pi->entry + i - 1);
1345 /* the number of actual entries - some computers have lots of
1346 * depth 0 samples at the end of a dive, we want to make sure
1347 * we have exactly one of them at the end */
1348 pi->nr = lastindex+1;
1349 while (pi->nr <= i+2 && pi->entry[pi->nr-1].depth > 0)
1351 pi->maxtime = pi->entry[lastindex].sec;
1353 /* Analyze_plot_info() will do the sample max pressures,
1354 * this handles the manual pressures
1356 pi->maxpressure = 0;
1357 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) {
1358 unsigned int mbar = dive->cylinder[cyl].start.mbar;
1359 if (mbar > pi->maxpressure)
1360 pi->maxpressure = mbar;
1363 pi->meandepth = dive->meandepth.mm;
1366 fill_missing_tank_pressures(pi, track_pr);
1368 for (cyl = 0; cyl < MAX_CYLINDERS; cyl++)
1369 list_free(track_pr[cyl]);
1370 if (0) /* awesome for debugging - not useful otherwise */
1372 return analyze_plot_info(pi);
1375 void plot(struct graphics_context *gc, cairo_rectangle_int_t *drawing_area, struct dive *dive)
1377 struct plot_info *pi;
1378 static struct sample fake[4];
1379 struct sample *sample = dive->sample;
1380 int nr = dive->samples;
1383 int duration = dive->duration.seconds;
1384 int maxdepth = dive->maxdepth.mm;
1386 fake[1].time.seconds = duration * 0.05;
1387 fake[1].depth.mm = maxdepth;
1388 fake[2].time.seconds = duration * 0.95;
1389 fake[2].depth.mm = maxdepth;
1390 fake[3].time.seconds = duration * 1.00;
1394 pi = create_plot_info(dive, nr, sample);
1396 cairo_translate(gc->cr, drawing_area->x, drawing_area->y);
1397 cairo_set_line_width(gc->cr, 1);
1398 cairo_set_line_cap(gc->cr, CAIRO_LINE_CAP_ROUND);
1399 cairo_set_line_join(gc->cr, CAIRO_LINE_JOIN_ROUND);
1402 * We can use "cairo_translate()" because that doesn't
1403 * scale line width etc. But the actual scaling we need
1404 * do set up ourselves..
1406 * Snif. What a pity.
1408 gc->maxx = (drawing_area->width - 2*drawing_area->x);
1409 gc->maxy = (drawing_area->height - 2*drawing_area->y);
1412 plot_depth_profile(gc, pi);
1413 plot_events(gc, pi, dive);
1415 /* Temperature profile */
1416 plot_temperature_profile(gc, pi);
1418 /* Cylinder pressure plot */
1419 plot_cylinder_pressure(gc, pi, dive);
1421 /* Text on top of all graphs.. */
1422 plot_temperature_text(gc, pi);
1423 plot_depth_text(gc, pi);
1424 plot_cylinder_pressure_text(gc, pi);
1426 /* Bounding box last */
1427 gc->leftx = 0; gc->rightx = 1.0;
1428 gc->topy = 0; gc->bottomy = 1.0;
1430 set_source_rgba(gc, BOUNDING_BOX);
1431 cairo_set_line_width(gc->cr, 1);
1436 cairo_close_path(gc->cr);
1437 cairo_stroke(gc->cr);