+/* profile.c */
+/* creates all the necessary data for drawing the dive profile
+ * uses cairo to draw it
+ */
#include <stdio.h>
#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
#include <time.h>
#include "dive.h"
#include "display.h"
+#include "divelist.h"
int selected_dive = 0;
+typedef enum { STABLE, SLOW, MODERATE, FAST, CRAZY } velocity_t;
+/* Plot info with smoothing, velocity indication
+ * and one-, two- and three-minute minimums and maximums */
+struct plot_info {
+ int nr;
+ int maxtime;
+ int meandepth, maxdepth;
+ int minpressure, maxpressure;
+ int mintemp, maxtemp;
+ struct plot_data {
+ int sec;
+ int pressure, temperature;
+ /* Depth info */
+ int val;
+ int smoothed;
+ velocity_t velocity;
+ struct plot_data *min[3];
+ struct plot_data *max[3];
+ int avg[3];
+ } entry[];
+};
+
+/* convert velocity to colors */
+typedef struct { double r, g, b; } rgb_t;
+static const rgb_t rgb[] = {
+ [STABLE] = {0.0, 0.4, 0.0},
+ [SLOW] = {0.4, 0.8, 0.0},
+ [MODERATE] = {0.8, 0.8, 0.0},
+ [FAST] = {0.8, 0.5, 0.0},
+ [CRAZY] = {1.0, 0.0, 0.0},
+};
+
+#define plot_info_size(nr) (sizeof(struct plot_info) + (nr)*sizeof(struct plot_data))
+
+/* Scale to 0,0 -> maxx,maxy */
+#define SCALEX(gc,x) (((x)-gc->leftx)/(gc->rightx-gc->leftx)*gc->maxx)
+#define SCALEY(gc,y) (((y)-gc->topy)/(gc->bottomy-gc->topy)*gc->maxy)
+#define SCALE(gc,x,y) SCALEX(gc,x),SCALEY(gc,y)
+
+static void move_to(struct graphics_context *gc, double x, double y)
+{
+ cairo_move_to(gc->cr, SCALE(gc, x, y));
+}
+
+static void line_to(struct graphics_context *gc, double x, double y)
+{
+ cairo_line_to(gc->cr, SCALE(gc, x, y));
+}
+
+static void set_source_rgba(struct graphics_context *gc, double r, double g, double b, double a)
+{
+ if (gc->printer) {
+ /* Black is white and white is black */
+ double sum = r+g+b;
+ if (sum > 2)
+ r = g = b = 0;
+ else if (sum < 1)
+ r = g = b = 1;
+ }
+ cairo_set_source_rgba(gc->cr, r, g, b, a);
+}
+
+void set_source_rgb(struct graphics_context *gc, double r, double g, double b)
+{
+ set_source_rgba(gc, r, g, b, 1);
+}
+
#define ROUND_UP(x,y) ((((x)+(y)-1)/(y))*(y))
-#define MAX(x,y) ((x) > (y) ? (x) : (y))
-static int round_seconds_up(int seconds)
+/*
+ * 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.
+ * we also need to add 180 seconds at the end so the min/max
+ * plots correctly
+ */
+static int get_maxtime(struct plot_info *pi)
{
- return MAX(30, ROUND_UP(seconds, 60*10));
+ int seconds = pi->maxtime;
+ /* min 30 minutes, rounded up to 5 minutes, with at least 2.5 minutes to spare */
+ return MAX(30*60, ROUND_UP(seconds+150, 60*5));
}
-static int round_feet_up(int feet)
+static int get_maxdepth(struct plot_info *pi)
{
- return MAX(45, ROUND_UP(feet+5, 15));
+ unsigned mm = pi->maxdepth;
+ /* Minimum 30m, rounded up to 10m, with at least 3m to spare */
+ return MAX(30000, ROUND_UP(mm+3000, 10000));
}
-/* Scale to 0,0 -> maxx,maxy */
-#define SCALE(x,y) (x)*maxx/scalex+topx,(y)*maxy/scaley+topy
+typedef struct {
+ int size;
+ double r,g,b;
+ double hpos, vpos;
+} text_render_options_t;
+
+#define RIGHT (-1.0)
+#define CENTER (-0.5)
+#define LEFT (0.0)
-static void plot(cairo_t *cr, int w, int h, struct dive *dive, int samples, struct sample *sample)
+#define TOP (1)
+#define MIDDLE (0)
+#define BOTTOM (-1)
+
+static void plot_text(struct graphics_context *gc, const text_render_options_t *tro,
+ double x, double y, const char *fmt, ...)
{
+ cairo_t *cr = gc->cr;
+ cairo_font_extents_t fe;
+ cairo_text_extents_t extents;
+ double dx, dy;
+ char buffer[80];
+ va_list args;
+
+ va_start(args, fmt);
+ vsnprintf(buffer, sizeof(buffer), fmt, args);
+ va_end(args);
+
+ cairo_set_font_size(cr, tro->size);
+ cairo_font_extents(cr, &fe);
+ cairo_text_extents(cr, buffer, &extents);
+ dx = tro->hpos * extents.width + extents.x_bearing;
+ dy = tro->vpos * extents.height + fe.descent;
+
+ move_to(gc, x, y);
+ cairo_rel_move_to(cr, dx, dy);
+
+ cairo_text_path(cr, buffer);
+ set_source_rgb(gc, 0, 0, 0);
+ cairo_stroke(cr);
+
+ move_to(gc, x, y);
+ cairo_rel_move_to(cr, dx, dy);
+
+ set_source_rgb(gc, tro->r, tro->g, tro->b);
+ cairo_show_text(cr, buffer);
+}
+
+static void render_depth_sample(struct graphics_context *gc, struct plot_data *entry, const text_render_options_t *tro)
+{
+ int sec = entry->sec;
+ depth_t depth = { entry->val };
+ const char *fmt;
+ double d;
+
+ switch (output_units.length) {
+ case METERS:
+ d = depth.mm / 1000.0;
+ fmt = "%.1f";
+ break;
+ case FEET:
+ d = to_feet(depth);
+ fmt = "%.0f";
+ break;
+ }
+ plot_text(gc, tro, sec, depth.mm, fmt, d);
+}
+
+static void plot_text_samples(struct graphics_context *gc, struct plot_info *pi)
+{
+ static const text_render_options_t deep = {14, 1.0, 0.2, 0.2, CENTER, TOP};
+ static const text_render_options_t shallow = {14, 1.0, 0.2, 0.2, CENTER, BOTTOM};
int i;
- double topx, topy, maxx, maxy;
- double scalex, scaley;
- int maxtime, maxdepth;
- topx = w / 20.0;
- topy = h / 20.0;
- maxx = (w - 2*topx);
- maxy = (h - 2*topy);
+ for (i = 0; i < pi->nr; i++) {
+ struct plot_data *entry = pi->entry + i;
+
+ if (entry->val < 2000)
+ continue;
+
+ if (entry == entry->max[2])
+ render_depth_sample(gc, entry, &deep);
- cairo_set_line_width(cr, 2);
+ if (entry == entry->min[2])
+ render_depth_sample(gc, entry, &shallow);
+ }
+}
+
+static void plot_depth_text(struct graphics_context *gc, struct plot_info *pi)
+{
+ int maxtime, maxdepth;
/* Get plot scaling limits */
- maxtime = round_seconds_up(dive->duration.seconds);
- maxdepth = round_feet_up(to_feet(dive->maxdepth));
+ maxtime = get_maxtime(pi);
+ maxdepth = get_maxdepth(pi);
+
+ gc->leftx = 0; gc->rightx = maxtime;
+ gc->topy = 0; gc->bottomy = maxdepth;
+
+ plot_text_samples(gc, pi);
+}
- /* Depth markers: every 15 ft */
- scalex = 1.0;
- scaley = maxdepth;
- cairo_set_source_rgba(cr, 1, 1, 1, 0.5);
- for (i = 15; i < maxdepth; i += 15) {
- cairo_move_to(cr, SCALE(0, i));
- cairo_line_to(cr, SCALE(1, i));
+static void plot_smoothed_profile(struct graphics_context *gc, struct plot_info *pi)
+{
+ int i;
+ struct plot_data *entry = pi->entry;
+
+ cairo_set_source_rgba(gc->cr, 1, 0.2, 0.2, 0.20);
+ move_to(gc, entry->sec, entry->smoothed);
+ for (i = 1; i < pi->nr; i++) {
+ entry++;
+ line_to(gc, entry->sec, entry->smoothed);
}
+ cairo_stroke(gc->cr);
+}
+
+static void plot_minmax_profile_minute(struct graphics_context *gc, struct plot_info *pi,
+ int index, double a)
+{
+ int i;
+ struct plot_data *entry = pi->entry;
+
+ cairo_set_source_rgba(gc->cr, 1, 0.2, 1, a);
+ move_to(gc, entry->sec, entry->min[index]->val);
+ for (i = 1; i < pi->nr; i++) {
+ entry++;
+ line_to(gc, entry->sec, entry->min[index]->val);
+ }
+ for (i = 1; i < pi->nr; i++) {
+ line_to(gc, entry->sec, entry->max[index]->val);
+ entry--;
+ }
+ cairo_close_path(gc->cr);
+ cairo_fill(gc->cr);
+}
+
+static void plot_minmax_profile(struct graphics_context *gc, struct plot_info *pi)
+{
+ if (gc->printer)
+ return;
+ plot_minmax_profile_minute(gc, pi, 2, 0.1);
+ plot_minmax_profile_minute(gc, pi, 1, 0.1);
+ plot_minmax_profile_minute(gc, pi, 0, 0.1);
+}
+
+static void plot_depth_profile(struct graphics_context *gc, struct plot_info *pi)
+{
+ int i;
+ cairo_t *cr = gc->cr;
+ int ends, sec, depth;
+ int *secs;
+ int *depths;
+ struct plot_data *entry;
+ int maxtime, maxdepth, marker;
+
+ /* Get plot scaling limits */
+ maxtime = get_maxtime(pi);
+ maxdepth = get_maxdepth(pi);
/* Time markers: every 5 min */
- scalex = maxtime;
- scaley = 1.0;
+ gc->leftx = 0; gc->rightx = maxtime;
+ gc->topy = 0; gc->bottomy = 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));
+ move_to(gc, i, 0);
+ line_to(gc, i, 1);
}
- cairo_stroke(cr);
- scaley = maxdepth;
+ /* Depth markers: every 30 ft or 10 m*/
+ gc->leftx = 0; gc->rightx = 1.0;
+ gc->topy = 0; gc->bottomy = maxdepth;
+ switch (output_units.length) {
+ case METERS: marker = 10000; break;
+ case FEET: marker = 9144; break; /* 30 ft */
+ }
- /* Depth profile */
- cairo_set_source_rgba(cr, 1, 0.2, 0.2, 0.80);
- cairo_move_to(cr, SCALE(sample->time.seconds, to_feet(sample->depth)));
- for (i = 1; i < dive->samples; i++) {
- sample++;
- cairo_line_to(cr, SCALE(sample->time.seconds, to_feet(sample->depth)));
+ set_source_rgba(gc, 1, 1, 1, 0.5);
+ for (i = marker; i < maxdepth; i += marker) {
+ move_to(gc, 0, i);
+ line_to(gc, 1, i);
}
cairo_stroke(cr);
- /* Bounding box last */
- scalex = scaley = 1.0;
- cairo_set_source_rgb(cr, 1, 1, 1);
- cairo_move_to(cr, SCALE(0,0));
- cairo_line_to(cr, SCALE(0,1));
- cairo_line_to(cr, SCALE(1,1));
- cairo_line_to(cr, SCALE(1,0));
+ /* Show mean depth */
+ set_source_rgba(gc, 1, 0.2, 0.2, 0.40);
+ move_to(gc, 0, pi->meandepth);
+ line_to(gc, 1, pi->meandepth);
+ cairo_stroke(cr);
+
+ gc->leftx = 0; gc->rightx = maxtime;
+
+ plot_smoothed_profile(gc, pi);
+ plot_minmax_profile(gc, pi);
+
+ entry = pi->entry;
+ set_source_rgba(gc, 1, 0.2, 0.2, 0.80);
+ secs = (int *) malloc(sizeof(int) * pi->nr);
+ depths = (int *) malloc(sizeof(int) * pi->nr);
+ secs[0] = entry->sec;
+ depths[0] = entry->val;
+ for (i = 1; i < pi->nr; i++) {
+ entry++;
+ sec = entry->sec;
+ if (sec <= maxtime || entry->val > 0) {
+ /* we want to draw the segments in different colors
+ * representing the vertical velocity, so we need to
+ * chop this into short segments */
+ rgb_t color = rgb[entry->velocity];
+ depth = entry->val;
+ set_source_rgb(gc, color.r, color.g, color.b);
+ move_to(gc, secs[i-1], depths[i-1]);
+ line_to(gc, sec, depth);
+ cairo_stroke(cr);
+ ends = i;
+ }
+ secs[i] = sec;
+ depths[i] = depth;
+ }
+ move_to(gc, secs[ends], depths[ends]);
+ gc->topy = 0; gc->bottomy = 1.0;
+ line_to(gc, secs[ends], 0);
+ line_to(gc, secs[0], 0);
cairo_close_path(cr);
+ set_source_rgba(gc, 1, 0.2, 0.2, 0.80);
+ cairo_stroke(cr);
+ /* now do it again for the neat fill */
+ gc->topy = 0; gc->bottomy = maxdepth;
+ set_source_rgba(gc, 1, 0.2, 0.2, 0.20);
+ move_to(gc, secs[0], depths[0]);
+ for (i = 1; i <= ends; i++) {
+ line_to(gc, secs[i],depths[i]);
+ }
+ gc->topy = 0; gc->bottomy = 1.0;
+ line_to(gc, secs[ends], 0);
+ line_to(gc, secs[0], 0);
+ cairo_close_path(gc->cr);
+ cairo_fill(gc->cr);
+}
+
+static int setup_temperature_limits(struct graphics_context *gc, struct plot_info *pi)
+{
+ int maxtime, mintemp, maxtemp, delta;
+
+ /* Get plot scaling limits */
+ maxtime = get_maxtime(pi);
+ mintemp = pi->mintemp;
+ maxtemp = pi->maxtemp;
+
+ gc->leftx = 0; gc->rightx = maxtime;
+ /* Show temperatures in roughly the lower third, but make sure the scale
+ is at least somewhat reasonable */
+ delta = maxtemp - mintemp;
+ if (delta > 3000) { /* more than 3K in fluctuation */
+ gc->topy = maxtemp + delta*2;
+ gc->bottomy = mintemp - delta/2;
+ } else {
+ gc->topy = maxtemp + 1500 + delta*2;
+ gc->bottomy = mintemp - delta/2;
+ }
+
+ return maxtemp > mintemp;
+}
+
+static void plot_single_temp_text(struct graphics_context *gc, int sec, int mkelvin)
+{
+ int deg;
+ const char *unit;
+ static const text_render_options_t tro = {12, 0.2, 0.2, 1.0, LEFT, TOP};
+ temperature_t temperature = { mkelvin };
+
+ if (output_units.temperature == FAHRENHEIT) {
+ deg = to_F(temperature);
+ unit = "F";
+ } else {
+ deg = to_C(temperature);
+ unit = "C";
+ }
+ plot_text(gc, &tro, sec, temperature.mkelvin, "%d %s", deg, unit);
+}
+
+static void plot_temperature_text(struct graphics_context *gc, struct plot_info *pi)
+{
+ int i;
+ int last = 0, sec = 0;
+ int last_temperature = 0, last_printed_temp = 0;
+
+ if (!setup_temperature_limits(gc, pi))
+ return;
+
+ for (i = 0; i < pi->nr; i++) {
+ struct plot_data *entry = pi->entry+i;
+ int mkelvin = entry->temperature;
+
+ if (!mkelvin)
+ continue;
+ last_temperature = mkelvin;
+ sec = entry->sec;
+ if (sec < last + 300)
+ continue;
+ last = sec;
+ plot_single_temp_text(gc,sec,mkelvin);
+ last_printed_temp = mkelvin;
+ }
+ /* it would be nice to print the end temperature, if it's different */
+ if (abs(last_temperature - last_printed_temp) > 500)
+ plot_single_temp_text(gc, sec, last_temperature);
+}
+
+static void plot_temperature_profile(struct graphics_context *gc, struct plot_info *pi)
+{
+ int i;
+ cairo_t *cr = gc->cr;
+ int last = 0;
+
+ if (!setup_temperature_limits(gc, pi))
+ return;
+
+ set_source_rgba(gc, 0.2, 0.2, 1.0, 0.8);
+ for (i = 0; i < pi->nr; i++) {
+ struct plot_data *entry = pi->entry + i;
+ int mkelvin = entry->temperature;
+ int sec = entry->sec;
+ if (!mkelvin) {
+ if (!last)
+ continue;
+ mkelvin = last;
+ }
+ if (last)
+ line_to(gc, sec, mkelvin);
+ else
+ move_to(gc, sec, mkelvin);
+ last = mkelvin;
+ }
cairo_stroke(cr);
+}
+
+/* gets both the actual start and end pressure as well as the scaling factors */
+static int get_cylinder_pressure_range(struct graphics_context *gc, struct plot_info *pi)
+{
+ gc->leftx = 0;
+ gc->rightx = get_maxtime(pi);
+ gc->bottomy = 0; gc->topy = pi->maxpressure * 1.5;
+ return pi->maxpressure != 0;
}
-static gboolean expose_event(GtkWidget *widget, GdkEventExpose *event, gpointer data)
+static void plot_cylinder_pressure(struct graphics_context *gc, struct plot_info *pi)
{
- struct dive *dive = dive_table.dives[selected_dive];
- cairo_t *cr;
- int w,h;
+ int i;
- w = widget->allocation.width;
- h = widget->allocation.height;
+ if (!get_cylinder_pressure_range(gc, pi))
+ return;
- cr = gdk_cairo_create(widget->window);
- cairo_set_source_rgb(cr, 0, 0, 0);
- cairo_paint(cr);
+ cairo_set_source_rgba(gc->cr, 0.2, 1.0, 0.2, 0.80);
- if (dive->samples)
- plot(cr, w, h, dive, dive->samples, dive->sample);
+ move_to(gc, 0, pi->maxpressure);
+ for (i = 1; i < pi->nr; i++) {
+ int mbar;
+ struct plot_data *entry = pi->entry + i;
- cairo_destroy(cr);
+ mbar = entry->pressure;
+ if (!mbar)
+ continue;
+ line_to(gc, entry->sec, mbar);
+ }
+ line_to(gc, pi->maxtime, pi->minpressure);
+ cairo_stroke(gc->cr);
+}
- return FALSE;
+static int mbar_to_PSI(int mbar)
+{
+ pressure_t p = {mbar};
+ return to_PSI(p);
}
-GtkWidget *dive_profile_frame(void)
+static void plot_cylinder_pressure_text(struct graphics_context *gc, struct plot_info *pi)
{
- GtkWidget *frame;
- GtkWidget *da;
+ if (get_cylinder_pressure_range(gc, pi)) {
+ int start, end;
+ const char *unit = "bar";
+
+ switch (output_units.pressure) {
+ case PASCAL:
+ start = pi->maxpressure * 100;
+ end = pi->minpressure * 100;
+ unit = "pascal";
+ break;
+ case BAR:
+ start = (pi->maxpressure + 500) / 1000;
+ end = (pi->minpressure + 500) / 1000;
+ unit = "bar";
+ break;
+ case PSI:
+ start = mbar_to_PSI(pi->maxpressure);
+ end = mbar_to_PSI(pi->minpressure);
+ unit = "psi";
+ break;
+ }
+
+ text_render_options_t tro = {10, 0.2, 1.0, 0.2, LEFT, TOP};
+ plot_text(gc, &tro, 0, pi->maxpressure, "%d %s", start, unit);
+ plot_text(gc, &tro, pi->maxtime, pi->minpressure,
+ "%d %s", end, unit);
+ }
+}
+
+static void analyze_plot_info_minmax_minute(struct plot_data *entry, struct plot_data *first, struct plot_data *last, int index)
+{
+ struct plot_data *p = entry;
+ int time = entry->sec;
+ int seconds = 90*(index+1);
+ struct plot_data *min, *max;
+ int avg, nr;
+
+ /* Go back 'seconds' in time */
+ while (p > first) {
+ if (p[-1].sec < time - seconds)
+ break;
+ p--;
+ }
+
+ /* Then go forward until we hit an entry past the time */
+ min = max = p;
+ avg = p->val;
+ nr = 1;
+ while (++p < last) {
+ int val = p->val;
+ if (p->sec > time + seconds)
+ break;
+ avg += val;
+ nr ++;
+ if (val < min->val)
+ min = p;
+ if (val > max->val)
+ max = p;
+ }
+ entry->min[index] = min;
+ entry->max[index] = max;
+ entry->avg[index] = (avg + nr/2) / nr;
+}
+
+static void analyze_plot_info_minmax(struct plot_data *entry, struct plot_data *first, struct plot_data *last)
+{
+ analyze_plot_info_minmax_minute(entry, first, last, 0);
+ analyze_plot_info_minmax_minute(entry, first, last, 1);
+ analyze_plot_info_minmax_minute(entry, first, last, 2);
+}
+
+static velocity_t velocity(int speed)
+{
+ velocity_t v;
+
+ if (speed < -304) /* ascent faster than -60ft/min */
+ v = CRAZY;
+ else if (speed < -152) /* above -30ft/min */
+ v = FAST;
+ else if (speed < -76) /* -15ft/min */
+ v = MODERATE;
+ else if (speed < -25) /* -5ft/min */
+ v = SLOW;
+ else if (speed < 25) /* very hard to find data, but it appears that the recommendations
+ for descent are usually about 2x ascent rate; still, we want
+ stable to mean stable */
+ v = STABLE;
+ else if (speed < 152) /* between 5 and 30ft/min is considered slow */
+ v = SLOW;
+ else if (speed < 304) /* up to 60ft/min is moderate */
+ v = MODERATE;
+ else if (speed < 507) /* up to 100ft/min is fast */
+ v = FAST;
+ else /* more than that is just crazy - you'll blow your ears out */
+ v = CRAZY;
+
+ return v;
+}
+static struct plot_info *analyze_plot_info(struct plot_info *pi)
+{
+ int i;
+ int nr = pi->nr;
+
+ /* Do pressure min/max based on the non-surface data */
+ for (i = 0; i < nr; i++) {
+ struct plot_data *entry = pi->entry+i;
+ int pressure = entry->pressure;
+ int temperature = entry->temperature;
+
+ if (pressure) {
+ if (!pi->minpressure || pressure < pi->minpressure)
+ pi->minpressure = pressure;
+ if (pressure > pi->maxpressure)
+ pi->maxpressure = pressure;
+ }
+
+ if (temperature) {
+ if (!pi->mintemp || temperature < pi->mintemp)
+ pi->mintemp = temperature;
+ if (temperature > pi->maxtemp)
+ pi->maxtemp = temperature;
+ }
+ }
+
+ /* Smoothing function: 5-point triangular smooth */
+ for (i = 2; i < nr-1; i++) {
+ struct plot_data *entry = pi->entry+i;
+ int val;
+
+ if (i < nr-2) {
+ val = entry[-2].val + 2*entry[-1].val + 3*entry[0].val + 2*entry[1].val + entry[2].val;
+ entry->smoothed = (val+4) / 9;
+ }
+ /* vertical velocity in mm/sec */
+ /* Linus wants to smooth this - let's at least look at the samples that aren't FAST or CRAZY */
+ if (entry[0].sec - entry[-1].sec) {
+ entry->velocity = velocity((entry[0].val - entry[-1].val) / (entry[0].sec - entry[-1].sec));
+ /* if our samples are short and we aren't too FAST*/
+ if (entry[0].sec - entry[-1].sec < 30 && entry->velocity < FAST) {
+ int past = -2;
+ while (pi->entry <= entry-past && entry[0].sec - entry[past].sec < 30)
+ past--;
+ entry->velocity = velocity((entry[0].val - entry[past].val) /
+ (entry[0].sec - entry[past].sec));
+ }
+ } else
+ entry->velocity = STABLE;
+ }
+
+ /* One-, two- and three-minute minmax data */
+ for (i = 0; i < nr; i++) {
+ struct plot_data *entry = pi->entry +i;
+ analyze_plot_info_minmax(entry, pi->entry, pi->entry+nr);
+ }
+
+ return pi;
+}
+
+/*
+ * Create a plot-info with smoothing and ranged min/max
+ *
+ * This also makes sure that we have extra empty events on both
+ * sides, so that you can do end-points without having to worry
+ * about it.
+ */
+static struct plot_info *create_plot_info(struct dive *dive)
+{
+ int lastdepth, lastindex;
+ int i, nr = dive->samples + 4, sec;
+ size_t alloc_size = plot_info_size(nr);
+ struct plot_info *pi;
+
+ pi = malloc(alloc_size);
+ if (!pi)
+ return pi;
+ memset(pi, 0, alloc_size);
+ pi->nr = nr;
+ sec = 0;
+ lastindex = 0;
+ lastdepth = -1;
+ for (i = 0; i < dive->samples; i++) {
+ int depth;
+ struct sample *sample = dive->sample+i;
+ struct plot_data *entry = pi->entry + i + 2;
+
+ sec = entry->sec = sample->time.seconds;
+ depth = entry->val = sample->depth.mm;
+ entry->pressure = sample->cylinderpressure.mbar;
+ entry->temperature = sample->temperature.mkelvin;
+
+ if (depth || lastdepth)
+ lastindex = i+2;
+
+ lastdepth = depth;
+ if (depth > pi->maxdepth)
+ pi->maxdepth = depth;
+ }
+ if (lastdepth)
+ lastindex = i + 2;
+ /* Fill in the last two entries with empty values but valid times */
+ i = dive->samples + 2;
+ pi->entry[i].sec = sec + 20;
+ pi->entry[i+1].sec = sec + 40;
+
+ pi->nr = lastindex+1;
+ pi->maxtime = pi->entry[lastindex].sec;
+
+ pi->minpressure = dive->cylinder[0].end.mbar;
+ pi->maxpressure = dive->cylinder[0].start.mbar;
+
+ pi->meandepth = dive->meandepth.mm;
+
+ return analyze_plot_info(pi);
+}
+
+void plot(struct graphics_context *gc, int w, int h, struct dive *dive)
+{
+ double topx, topy;
+ struct plot_info *pi = create_plot_info(dive);
+
+ topx = w / 20.0;
+ topy = h / 20.0;
+ cairo_translate(gc->cr, topx, topy);
+ cairo_set_line_width(gc->cr, 2);
+ cairo_set_line_cap(gc->cr, CAIRO_LINE_CAP_ROUND);
+ cairo_set_line_join(gc->cr, CAIRO_LINE_JOIN_ROUND);
+
+ /*
+ * We can use "cairo_translate()" because that doesn't
+ * scale line width etc. But the actual scaling we need
+ * do set up ourselves..
+ *
+ * Snif. What a pity.
+ */
+ gc->maxx = (w - 2*topx);
+ gc->maxy = (h - 2*topy);
+
+ /* Temperature profile */
+ plot_temperature_profile(gc, pi);
+
+ /* Cylinder pressure plot */
+ plot_cylinder_pressure(gc, pi);
+
+ /* Depth profile */
+ plot_depth_profile(gc, pi);
+
+ /* Text on top of all graphs.. */
+ plot_temperature_text(gc, pi);
+ plot_depth_text(gc, pi);
+ plot_cylinder_pressure_text(gc, pi);
+
+ /* Bounding box last */
+ gc->leftx = 0; gc->rightx = 1.0;
+ gc->topy = 0; gc->bottomy = 1.0;
- 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);
+ set_source_rgb(gc, 1, 1, 1);
+ move_to(gc, 0, 0);
+ line_to(gc, 0, 1);
+ line_to(gc, 1, 1);
+ line_to(gc, 1, 0);
+ cairo_close_path(gc->cr);
+ cairo_stroke(gc->cr);
- return frame;
}
projects / ext / subsurface.git / blobdiff