#include <stdio.h>
#include <stdlib.h>
+#include <stdarg.h>
#include <time.h>
#include "dive.h"
#include "display.h"
+#include "divelist.h"
int selected_dive = 0;
#define ROUND_UP(x,y) ((((x)+(y)-1)/(y))*(y))
-#define MAX(x,y) ((x) > (y) ? (x) : (y))
+/*
+ * When showing dive profiles, we scale things to the
+ * current dive. However, we don't scale past less than
+ * 30 minutes or 90 ft, just so that small dives show
+ * up as such.
+ */
static int round_seconds_up(int seconds)
{
- return MAX(30, ROUND_UP(seconds, 60*10));
+ return MAX(30*60, ROUND_UP(seconds, 60*10));
}
static int round_feet_up(int feet)
{
- return MAX(45, ROUND_UP(feet+5, 15));
+ return MAX(90, ROUND_UP(feet+5, 15));
+}
+
+typedef struct {
+ double r,g,b;
+ enum {CENTER,LEFT} allign;
+} text_render_options_t;
+
+static void plot_text(cairo_t *cr, text_render_options_t *tro,
+ double x, double y, const char *fmt, ...)
+{
+ cairo_text_extents_t extents;
+ char buffer[80];
+ va_list args;
+
+ va_start(args, fmt);
+ vsnprintf(buffer, sizeof(buffer), fmt, args);
+ va_end(args);
+
+ cairo_text_extents(cr, buffer, &extents);
+
+ if (tro->allign == CENTER)
+ x -= extents.width/2 + extents.x_bearing;
+ y += extents.height * 1.2;
+
+ cairo_move_to(cr, x, y);
+ cairo_text_path(cr, buffer);
+ cairo_set_source_rgb(cr, 0, 0, 0);
+ cairo_stroke(cr);
+
+ cairo_move_to(cr, x, y);
+ cairo_set_source_rgb(cr, tro->r, tro->g, tro->b);
+ cairo_show_text(cr, buffer);
+}
+
+/*
+ * Find the next maximum point in a 10-minute window.
+ *
+ * We exit early if we hit "enough" of a depth reversal,
+ * which is roughly 10 feet.
+ */
+static int next_minmax(struct dive *dive, int index, int minmax)
+{
+ const int enough = 3000;
+ int timelimit, depthlimit, result;
+ struct sample *sample = dive->sample + index;
+
+ if (index >= dive->samples)
+ return 0;
+
+ timelimit = 24*60*60;
+ depthlimit = sample->depth.mm;
+ result = 0;
+
+ for (;;) {
+ int time, depth;
+
+ index++;
+ sample++;
+ if (index >= dive->samples)
+ break;
+ time = sample->time.seconds;
+ depth = sample->depth.mm;
+ if (time > timelimit)
+ break;
+
+ if (minmax) {
+ if (depth <= depthlimit) {
+ if (depthlimit - depth > enough)
+ break;
+ continue;
+ }
+ } else {
+ if (depth >= depthlimit) {
+ if (depth - depthlimit > enough)
+ break;
+ continue;
+ }
+ }
+
+ result = index;
+ depthlimit = depth;
+ /* Look up to ten minutes into the future */
+ timelimit = time + 600;
+ }
+ return result;
}
/* Scale to 0,0 -> maxx,maxy */
-#define SCALE(x,y) (x)*maxx/scalex+topx,(y)*maxy/scaley+topy
+#define SCALE(x,y) (x)*maxx/scalex,(y)*maxy/scaley
-static void plot(cairo_t *cr, int w, int h, struct dive *dive, int samples, struct sample *sample)
+static void plot_depth_text(struct dive *dive, cairo_t *cr,
+ double maxx, double maxy)
{
- int i;
- double topx, topy, maxx, maxy;
double scalex, scaley;
int maxtime, maxdepth;
+ int i;
+
+ /* Get plot scaling limits */
+ maxtime = round_seconds_up(dive->duration.seconds);
+ maxdepth = round_feet_up(to_feet(dive->maxdepth));
+
+ scalex = maxtime;
+ scaley = maxdepth;
+
+ cairo_set_font_size(cr, 14);
+ cairo_set_source_rgb(cr, 1, 0.2, 0.2);
+ i = 0;
+ while ((i = next_minmax(dive, i, 1)) != 0) {
+ text_render_options_t tro = {1.0, 0.2, 0.2, CENTER};
+ struct sample *sample = dive->sample+i;
+ int sec = sample->time.seconds;
+ int depth = to_feet(sample->depth);
+
+ plot_text(cr, &tro, SCALE(sec, depth), "%d ft", depth);
+ i = next_minmax(dive, i, 0);
+ if (!i)
+ break;
+ }
+}
+
+static void plot_depth_profile(struct dive *dive, cairo_t *cr,
+ double maxx, double maxy)
+{
+ double scalex, scaley;
int begins, sec, depth;
+ int i, samples;
+ struct sample *sample;
+ int maxtime, maxdepth;
- topx = w / 20.0;
- topy = h / 20.0;
- maxx = (w - 2*topx);
- maxy = (h - 2*topy);
+ samples = dive->samples;
+ if (!samples)
+ return;
cairo_set_line_width(cr, 2);
maxtime = round_seconds_up(dive->duration.seconds);
maxdepth = round_feet_up(to_feet(dive->maxdepth));
+ /* Time markers: every 5 min */
+ scalex = maxtime;
+ scaley = 1.0;
+ for (i = 5*60; i < maxtime; i += 5*60) {
+ cairo_move_to(cr, SCALE(i, 0));
+ cairo_line_to(cr, SCALE(i, 1));
+ }
+
/* Depth markers: every 15 ft */
scalex = 1.0;
scaley = maxdepth;
cairo_move_to(cr, SCALE(0, i));
cairo_line_to(cr, SCALE(1, i));
}
+ cairo_stroke(cr);
- /* Time markers: every 5 min */
- scalex = maxtime;
- scaley = 1.0;
- for (i = 5*60; i < maxtime; i += 5*60) {
- cairo_move_to(cr, SCALE(i, 0));
- cairo_line_to(cr, SCALE(i, 1));
- }
+ /* Show mean depth */
+ cairo_set_source_rgba(cr, 1, 0.2, 0.2, 0.40);
+ cairo_move_to(cr, SCALE(0, to_feet(dive->meandepth)));
+ cairo_line_to(cr, SCALE(1, to_feet(dive->meandepth)));
cairo_stroke(cr);
- scaley = maxdepth;
+ scalex = maxtime;
- /* Depth profile */
+ sample = dive->sample;
cairo_set_source_rgba(cr, 1, 0.2, 0.2, 0.80);
begins = sample->time.seconds;
cairo_move_to(cr, SCALE(sample->time.seconds, to_feet(sample->depth)));
for (i = 1; i < dive->samples; i++) {
sample++;
sec = sample->time.seconds;
- depth = to_feet(sample->depth);
- cairo_line_to(cr, SCALE(sec, depth));
+ if (sec <= maxtime) {
+ depth = to_feet(sample->depth);
+ cairo_line_to(cr, SCALE(sec, depth));
+ }
}
scaley = 1.0;
- cairo_line_to(cr, SCALE(sec, 0));
+ cairo_line_to(cr, SCALE(MIN(sec,maxtime), 0));
cairo_line_to(cr, SCALE(begins, 0));
cairo_close_path(cr);
cairo_set_source_rgba(cr, 1, 0.2, 0.2, 0.20);
cairo_fill_preserve(cr);
cairo_set_source_rgba(cr, 1, 0.2, 0.2, 0.80);
cairo_stroke(cr);
+}
+
+/* gets both the actual start and end pressure as well as the scaling factors */
+static int get_cylinder_pressure_range(struct dive *dive, double *scalex, double *scaley,
+ pressure_t *startp, pressure_t *endp)
+{
+ int i;
+ int min, max, mbar;
+
+ *scalex = round_seconds_up(dive->duration.seconds);
+
+ max = 0;
+ min = 5000000;
+ if (startp)
+ startp->mbar = endp->mbar = 0;
+
+ for (i = 0; i < dive->samples; i++) {
+ struct sample *sample = dive->sample + i;
+
+ /* FIXME! We only track cylinder 0 right now */
+ if (sample->cylinderindex)
+ continue;
+ mbar = sample->cylinderpressure.mbar;
+ if (!mbar)
+ continue;
+ if (mbar && startp && !startp->mbar)
+ startp->mbar = mbar;
+ if (mbar < min)
+ min = mbar;
+ if (mbar > max)
+ max = mbar;
+ }
+ if (endp)
+ endp->mbar = mbar;
+ if (!max)
+ return 0;
+ *scaley = max * 1.5;
+ return 1;
+}
+
+static void plot_cylinder_pressure(struct dive *dive, cairo_t *cr,
+ double maxx, double maxy)
+{
+ int i, sec = -1;
+ double scalex, scaley;
+
+ if (!get_cylinder_pressure_range(dive, &scalex, &scaley, NULL, NULL))
+ return;
+
+ cairo_set_source_rgba(cr, 0.2, 1.0, 0.2, 0.80);
+
+ cairo_move_to(cr, SCALE(0, dive->cylinder[0].start.mbar));
+ for (i = 1; i < dive->samples; i++) {
+ int mbar;
+ struct sample *sample = dive->sample + i;
+
+ mbar = sample->cylinderpressure.mbar;
+ if (!mbar)
+ continue;
+ sec = sample->time.seconds;
+ if (sec <= dive->duration.seconds)
+ cairo_line_to(cr, SCALE(sec, mbar));
+ }
+ /*
+ * We may have "surface time" events, in which case we don't go
+ * back to dive duration
+ */
+ if (sec < dive->duration.seconds)
+ cairo_line_to(cr, SCALE(dive->duration.seconds, dive->cylinder[0].end.mbar));
+ cairo_stroke(cr);
+}
+
+/*
+ * Return air usage (in liters).
+ */
+static double calculate_airuse(struct dive *dive)
+{
+ double airuse = 0;
+ int i;
+
+ for (i = 0; i < MAX_CYLINDERS; i++) {
+ cylinder_t *cyl = dive->cylinder + i;
+ int size = cyl->type.size.mliter;
+ double kilo_atm;
+
+ if (!size)
+ continue;
+
+ kilo_atm = (cyl->start.mbar - cyl->end.mbar) / 1013250.0;
+
+ /* Liters of air at 1 atm == milliliters at 1k atm*/
+ airuse += kilo_atm * size;
+ }
+ return airuse;
+}
+
+static void plot_info(struct dive *dive, cairo_t *cr,
+ double maxx, double maxy)
+{
+ text_render_options_t tro = {0.2, 1.0, 0.2, LEFT};
+ const double liters_per_cuft = 28.317;
+ double airuse;
+
+ airuse = calculate_airuse(dive);
+ if (!airuse)
+ return;
+
+ /* I really need to start addign some unit setting thing */
+ airuse /= liters_per_cuft;
+ plot_text(cr, &tro, maxx*0.8, maxy*0.8, "cuft: %4.2f", airuse);
+ if (dive->duration.seconds) {
+ double pressure = 1 + (dive->meandepth.mm / 10000.0);
+ double sac = airuse / pressure * 60 / dive->duration.seconds;
+ plot_text(cr, &tro, maxx*0.8, maxy*0.85, "SAC: %4.2f", sac);
+ }
+}
+
+static void plot_cylinder_pressure_text(struct dive *dive, cairo_t *cr,
+ double maxx, double maxy)
+{
+ double scalex, scaley;
+ pressure_t startp, endp;
+
+ cairo_set_font_size(cr, 10);
+
+ if (get_cylinder_pressure_range(dive, &scalex, &scaley,
+ &startp, &endp)) {
+ text_render_options_t tro = {0.2, 1.0, 0.2, LEFT};
+ plot_text(cr, &tro, SCALE(0, startp.mbar), "%3.0f bar", startp.mbar/1000.0);
+ plot_text(cr, &tro, SCALE(dive->duration.seconds, endp.mbar),
+ "%3.0f bar", endp.mbar/1000.0);
+ }
+}
+
+static void plot(cairo_t *cr, int w, int h, struct dive *dive)
+{
+ double topx, topy, maxx, maxy;
+ double scalex, scaley;
+
+ topx = w / 20.0;
+ topy = h / 20.0;
+ maxx = (w - 2*topx);
+ maxy = (h - 2*topy);
+ cairo_translate(cr, topx, topy);
+
+ /* Cylinder pressure plot */
+ plot_cylinder_pressure(dive, cr, maxx, maxy);
+
+ /* Depth profile */
+ plot_depth_profile(dive, cr, maxx, maxy);
+
+ /* Text on top of all graphs.. */
+ plot_depth_text(dive, cr, maxx, maxy);
+ plot_cylinder_pressure_text(dive, cr, maxx, maxy);
+
+ /* And info box in the lower right corner.. */
+ plot_info(dive, cr, maxx, maxy);
/* Bounding box last */
scalex = scaley = 1.0;
static gboolean expose_event(GtkWidget *widget, GdkEventExpose *event, gpointer data)
{
- struct dive *dive = dive_table.dives[selected_dive];
+ struct dive *dive = current_dive;
cairo_t *cr;
int w,h;
cairo_set_source_rgb(cr, 0, 0, 0);
cairo_paint(cr);
- if (dive->samples)
- plot(cr, w, h, dive, dive->samples, dive->sample);
+ if (dive)
+ plot(cr, w, h, dive);
cairo_destroy(cr);
return FALSE;
}
-GtkWidget *dive_profile_frame(void)
+GtkWidget *dive_profile_widget(void)
{
- GtkWidget *frame;
GtkWidget *da;
- frame = gtk_frame_new("Dive profile");
- gtk_widget_show(frame);
da = gtk_drawing_area_new();
gtk_widget_set_size_request(da, 450, 350);
g_signal_connect(da, "expose_event", G_CALLBACK(expose_event), NULL);
- gtk_container_add(GTK_CONTAINER(frame), da);
- return frame;
+ return da;
}
projects / ext / subsurface.git / blobdiff