diff options
Diffstat (limited to 'profile.c')
| -rw-r--r-- | profile.c | 73 |
1 files changed, 69 insertions, 4 deletions
@@ -27,7 +27,7 @@ static int round_feet_up(int feet) return MAX(90, ROUND_UP(feet+5, 15)); } -static void plot_text(cairo_t *cr, double x, double y, const char *fmt, ...) +static void plot_text(cairo_t *cr, int xpos, int ypos, double x, double y, const char *fmt, ...) { cairo_text_extents_t extents; char buffer[80]; @@ -39,8 +39,26 @@ static void plot_text(cairo_t *cr, double x, double y, const char *fmt, ...) cairo_text_extents(cr, buffer, &extents); - x -= extents.width/2 + extents.x_bearing; - y += extents.height * 1.2; + switch (xpos) { + case -1: /* Left-justify */ + break; + case 0: /* Center */ + x -= extents.width/2 + extents.x_bearing; + break; + case 1: /* Right-justify */ + x -= extents.width + extents.x_bearing; + break; + } + switch (ypos) { + case -1: /* Top-justify */ + break; + case 0: /* Center */ + y -= extents.height/2 + extents.y_bearing; + break; + case 1: /* Bottom-justify */ + y += extents.height * 1.2; + break; + } cairo_move_to(cr, x, y); cairo_text_path(cr, buffer); @@ -130,7 +148,7 @@ static void plot_depth_text(struct dive *dive, cairo_t *cr, int sec = sample->time.seconds; int depth = to_feet(sample->depth); - plot_text(cr, SCALE(sec, depth), "%d ft", depth); + plot_text(cr, 0, 1, SCALE(sec, depth), "%d ft", depth); i = next_minmax(dive, i, 0); if (!i) break; @@ -263,6 +281,50 @@ static void plot_cylinder_pressure(struct dive *dive, cairo_t *cr, 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 topx, double topy, double maxx, double maxy) +{ + 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, 1, 0, maxx*0.95, maxy*0.9, "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, 1, 0, maxx*0.95, maxy*0.95, "SAC: %4.2f", sac); + } +} + static void plot(cairo_t *cr, int w, int h, struct dive *dive) { double topx, topy, maxx, maxy; @@ -282,6 +344,9 @@ static void plot(cairo_t *cr, int w, int h, struct dive *dive) /* Text on top of all graphs.. */ plot_depth_text(dive, cr, topx, topy, maxx, maxy); + /* And info box in the lower right corner.. */ + plot_info(dive, cr, topx, topy, maxx, maxy); + /* Bounding box last */ scalex = scaley = 1.0; cairo_set_source_rgb(cr, 1, 1, 1); |