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Print starting and ending pressures

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This is very simplistic as far as placement of the text goes.
It makes the plot_text function somewhat more generic.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Dirk Hohndel 2011-09-06 15:00:56 -07:00 committed by Linus Torvalds
parent e88695ff72
commit dfe5133b57
1 changed files with 43 additions and 7 deletions
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48
profile.c
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@ -27,7 +27,13 @@ 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, ...)
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];
@ -39,6 +45,7 @@ static void plot_text(cairo_t *cr, double x, double y, const char *fmt, ...)
cairo_text_extents(cr, buffer, &extents);
if (tro->allign == CENTER)
x -= extents.width/2 + extents.x_bearing;
y += extents.height * 1.2;
@ -48,7 +55,7 @@ static void plot_text(cairo_t *cr, double x, double y, const char *fmt, ...)
cairo_stroke(cr);
cairo_move_to(cr, x, y);
cairo_set_source_rgb(cr, 1, 0, 0);
cairo_set_source_rgb(cr, tro->r, tro->g, tro->b);
cairo_show_text(cr, buffer);
}
@ -126,11 +133,12 @@ static void plot_depth_text(struct dive *dive, cairo_t *cr,
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, SCALE(sec, depth), "%d ft", depth);
plot_text(cr, &tro, SCALE(sec, depth), "%d ft", depth);
i = next_minmax(dive, i, 0);
if (!i)
break;
@ -202,18 +210,23 @@ static void plot_depth_profile(struct dive *dive, cairo_t *cr,
cairo_stroke(cr);
}
static int get_cylinder_pressure_range(struct dive *dive, double *scalex, double *scaley)
/* 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,
double *startp, double *endp)
{
int i;
double min, max;
double bar;
*scalex = round_seconds_up(dive->duration.seconds);
max = 0;
min = 5000;
if (startp)
*startp = *endp = 0.0;
for (i = 0; i < dive->samples; i++) {
struct sample *sample = dive->sample + i;
double bar;
/* FIXME! We only track cylinder 0 right now */
if (sample->cylinderindex)
@ -221,11 +234,15 @@ static int get_cylinder_pressure_range(struct dive *dive, double *scalex, double
if (!sample->cylinderpressure.mbar)
continue;
bar = sample->cylinderpressure.mbar;
if (bar != 0.0 && startp && *startp == 0.0)
*startp = bar;
if (bar < min)
min = bar;
if (bar > max)
max = bar;
}
if (endp)
*endp = bar;
if (!max)
return 0;
*scaley = max * 1.5;
@ -238,7 +255,7 @@ static void plot_cylinder_pressure(struct dive *dive, cairo_t *cr,
int i, sec = -1;
double scalex, scaley;
if (!get_cylinder_pressure_range(dive, &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);
@ -263,6 +280,24 @@ static void plot_cylinder_pressure(struct dive *dive, cairo_t *cr,
cairo_stroke(cr);
}
static void plot_cylinder_pressure_text(struct dive *dive, cairo_t *cr,
double topx, double topy, double maxx, double maxy)
{
double scalex, scaley;
double 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), "%3.0f bar", startp/1000.0);
plot_text(cr, &tro, SCALE(dive->duration.seconds, endp),
"%3.0f bar", endp/1000.0);
}
}
static void plot(cairo_t *cr, int w, int h, struct dive *dive)
{
double topx, topy, maxx, maxy;
@ -281,6 +316,7 @@ 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);
plot_cylinder_pressure_text(dive, cr, topx, topy, maxx, maxy);
/* Bounding box last */
scalex = scaley = 1.0;