mirror of
https://github.com/subsurface/subsurface.git
synced 2024-11-28 05:00:20 +00:00
0a13d287e5
It doesn't really make much of a difference, but it can be visible especially with lots of tight samples. Miter joins really look horrible for acute angles. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
730 lines
17 KiB
C
730 lines
17 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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#include <time.h>
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#include "dive.h"
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#include "display.h"
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#include "divelist.h"
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int selected_dive = 0;
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/*
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* Cairo scaling really is horribly horribly mis-designed.
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*
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* Which is sad, because I really like Cairo otherwise. But
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* the fact that the line width is scaled with the same scale
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* as the coordinate system is a f*&%ing disaster. So we
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* can't use it, and instead have this butt-ugly wrapper thing..
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*/
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struct graphics_context {
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cairo_t *cr;
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double maxx, maxy;
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double leftx, rightx;
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double topy, bottomy;
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};
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/* Plot info with smoothing and one-, two- and three-minute minimums and maximums */
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struct plot_info {
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int nr;
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int maxtime;
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struct plot_data {
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int sec;
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int val;
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int smoothed;
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struct plot_data *min[3];
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struct plot_data *max[3];
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int avg[3];
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} entry[];
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};
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#define plot_info_size(nr) (sizeof(struct plot_info) + (nr)*sizeof(struct plot_data))
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/* Scale to 0,0 -> maxx,maxy */
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#define SCALEX(gc,x) (((x)-gc->leftx)/(gc->rightx-gc->leftx)*gc->maxx)
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#define SCALEY(gc,y) (((y)-gc->topy)/(gc->bottomy-gc->topy)*gc->maxy)
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#define SCALE(gc,x,y) SCALEX(gc,x),SCALEY(gc,y)
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static void move_to(struct graphics_context *gc, double x, double y)
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{
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cairo_move_to(gc->cr, SCALE(gc, x, y));
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}
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static void line_to(struct graphics_context *gc, double x, double y)
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{
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cairo_line_to(gc->cr, SCALE(gc, x, y));
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}
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#define ROUND_UP(x,y) ((((x)+(y)-1)/(y))*(y))
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/*
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* When showing dive profiles, we scale things to the
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* current dive. However, we don't scale past less than
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* 30 minutes or 90 ft, just so that small dives show
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* up as such.
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*/
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static int round_seconds_up(int seconds)
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{
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return MAX(30*60, ROUND_UP(seconds, 60*10));
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}
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static int round_depth_up(depth_t depth)
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{
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unsigned mm = depth.mm;
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/* Minimum 30m */
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return MAX(30000, ROUND_UP(mm+3000, 10000));
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}
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typedef struct {
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int size;
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double r,g,b;
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enum {CENTER,LEFT} halign;
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enum {MIDDLE,TOP,BOTTOM} valign;
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} text_render_options_t;
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static void plot_text(struct graphics_context *gc, const text_render_options_t *tro,
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double x, double y, const char *fmt, ...)
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{
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cairo_t *cr = gc->cr;
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cairo_text_extents_t extents;
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double dx, dy;
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char buffer[80];
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va_list args;
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va_start(args, fmt);
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vsnprintf(buffer, sizeof(buffer), fmt, args);
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va_end(args);
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cairo_set_font_size(cr, tro->size);
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cairo_text_extents(cr, buffer, &extents);
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dx = 0;
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switch (tro->halign) {
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case CENTER:
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dx = -(extents.width/2 + extents.x_bearing);
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break;
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case LEFT:
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dx = 0;
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break;
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}
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switch (tro->valign) {
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case TOP:
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dy = extents.height * 1.2;
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break;
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case BOTTOM:
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dy = -extents.height * 0.8;
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break;
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case MIDDLE:
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dy = 0;
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break;
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}
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move_to(gc, x, y);
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cairo_rel_move_to(cr, dx, dy);
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cairo_text_path(cr, buffer);
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cairo_set_source_rgb(cr, 0, 0, 0);
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cairo_stroke(cr);
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move_to(gc, x, y);
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cairo_rel_move_to(cr, dx, dy);
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cairo_set_source_rgb(cr, tro->r, tro->g, tro->b);
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cairo_show_text(cr, buffer);
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}
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static void render_depth_sample(struct graphics_context *gc, struct plot_data *entry, const text_render_options_t *tro)
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{
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int sec = entry->sec;
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depth_t depth = { entry->val };
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const char *fmt;
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double d;
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switch (output_units.length) {
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case METERS:
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d = depth.mm / 1000.0;
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fmt = "%.1f";
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break;
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case FEET:
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d = to_feet(depth);
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fmt = "%.0f";
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break;
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}
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plot_text(gc, tro, sec, depth.mm, fmt, d);
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}
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static void plot_text_samples(struct graphics_context *gc, struct plot_info *pi)
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{
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static const text_render_options_t deep = {14, 1.0, 0.2, 0.2, CENTER, TOP};
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static const text_render_options_t shallow = {14, 1.0, 0.2, 0.2, CENTER, BOTTOM};
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int i;
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for (i = 0; i < pi->nr; i++) {
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struct plot_data *entry = pi->entry + i;
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if (entry->val < 2000)
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continue;
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if (entry == entry->max[2])
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render_depth_sample(gc, entry, &deep);
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if (entry == entry->min[2])
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render_depth_sample(gc, entry, &shallow);
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}
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}
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static void plot_depth_text(struct dive *dive, struct graphics_context *gc, struct plot_info *pi)
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{
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int maxtime, maxdepth;
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/* Get plot scaling limits */
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maxtime = round_seconds_up(dive->duration.seconds);
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maxdepth = round_depth_up(dive->maxdepth);
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gc->leftx = 0; gc->rightx = maxtime;
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gc->topy = 0; gc->bottomy = maxdepth;
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plot_text_samples(gc, pi);
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}
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static void plot_smoothed_profile(struct graphics_context *gc, struct plot_info *pi)
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{
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int i;
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struct plot_data *entry = pi->entry;
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cairo_set_source_rgba(gc->cr, 1, 0.2, 0.2, 0.20);
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move_to(gc, entry->sec, entry->smoothed);
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for (i = 1; i < pi->nr; i++) {
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entry++;
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line_to(gc, entry->sec, entry->smoothed);
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}
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cairo_stroke(gc->cr);
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}
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static void plot_minmax_profile_minute(struct graphics_context *gc, struct plot_info *pi,
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int index, double a)
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{
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int i;
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struct plot_data *entry = pi->entry;
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cairo_set_source_rgba(gc->cr, 1, 0.2, 1, a);
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move_to(gc, entry->sec, entry->min[index]->val);
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for (i = 1; i < pi->nr; i++) {
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entry++;
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line_to(gc, entry->sec, entry->min[index]->val);
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}
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for (i = 1; i < pi->nr; i++) {
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line_to(gc, entry->sec, entry->max[index]->val);
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entry--;
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}
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cairo_close_path(gc->cr);
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cairo_fill(gc->cr);
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}
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static void plot_minmax_profile(struct graphics_context *gc, struct plot_info *pi)
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{
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plot_minmax_profile_minute(gc, pi, 2, 0.1);
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plot_minmax_profile_minute(gc, pi, 1, 0.1);
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plot_minmax_profile_minute(gc, pi, 0, 0.1);
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}
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static void plot_depth_profile(struct dive *dive, struct graphics_context *gc, struct plot_info *pi)
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{
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int i;
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cairo_t *cr = gc->cr;
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int begins, sec, depth;
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struct plot_data *entry;
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int maxtime, maxdepth, marker;
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/* Get plot scaling limits */
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maxtime = round_seconds_up(dive->duration.seconds);
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maxdepth = round_depth_up(dive->maxdepth);
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/* Time markers: every 5 min */
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gc->leftx = 0; gc->rightx = maxtime;
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gc->topy = 0; gc->bottomy = 1.0;
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for (i = 5*60; i < maxtime; i += 5*60) {
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move_to(gc, i, 0);
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line_to(gc, i, 1);
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}
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/* Depth markers: every 30 ft or 10 m*/
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gc->leftx = 0; gc->rightx = 1.0;
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gc->topy = 0; gc->bottomy = maxdepth;
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switch (output_units.length) {
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case METERS: marker = 10000; break;
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case FEET: marker = 9144; break; /* 30 ft */
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}
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cairo_set_source_rgba(cr, 1, 1, 1, 0.5);
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for (i = marker; i < maxdepth; i += marker) {
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move_to(gc, 0, i);
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line_to(gc, 1, i);
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}
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cairo_stroke(cr);
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/* Show mean depth */
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cairo_set_source_rgba(cr, 1, 0.2, 0.2, 0.40);
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move_to(gc, 0, dive->meandepth.mm);
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line_to(gc, 1, dive->meandepth.mm);
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cairo_stroke(cr);
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gc->leftx = 0; gc->rightx = maxtime;
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plot_smoothed_profile(gc, pi);
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plot_minmax_profile(gc, pi);
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entry = pi->entry;
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cairo_set_source_rgba(cr, 1, 0.2, 0.2, 0.80);
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begins = entry->sec;
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move_to(gc, entry->sec, entry->val);
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for (i = 1; i < pi->nr; i++) {
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entry++;
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sec = entry->sec;
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if (sec <= maxtime) {
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depth = entry->val;
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line_to(gc, sec, depth);
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}
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}
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gc->topy = 0; gc->bottomy = 1.0;
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line_to(gc, MIN(sec,maxtime), 0);
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line_to(gc, begins, 0);
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cairo_close_path(cr);
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cairo_set_source_rgba(cr, 1, 0.2, 0.2, 0.20);
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cairo_fill_preserve(cr);
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cairo_set_source_rgba(cr, 1, 0.2, 0.2, 0.80);
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cairo_stroke(cr);
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}
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static int setup_temperature_limits(struct dive *dive, struct graphics_context *gc)
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{
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int i;
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int maxtime, mintemp, maxtemp;
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/* Get plot scaling limits */
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maxtime = round_seconds_up(dive->duration.seconds);
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mintemp = INT_MAX;
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maxtemp = 0;
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for (i = 0; i < dive->samples; i++) {
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struct sample *sample = dive->sample+i;
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int mkelvin = sample->temperature.mkelvin;
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if (!mkelvin)
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continue;
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if (mkelvin > maxtemp)
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maxtemp = mkelvin;
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if (mkelvin < mintemp)
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mintemp = mkelvin;
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}
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gc->leftx = 0; gc->rightx = maxtime;
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/* Show temperatures in roughly the lower third */
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gc->topy = maxtemp + (maxtemp - mintemp)*2;
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gc->bottomy = mintemp - (maxtemp - mintemp)/2;
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return maxtemp > mintemp;
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}
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static void plot_temperature_text(struct dive *dive, struct graphics_context *gc)
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{
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int i;
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static const text_render_options_t tro = {12, 0.2, 0.2, 1.0, LEFT, TOP};
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int last = 0;
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if (!setup_temperature_limits(dive, gc))
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return;
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for (i = 0; i < dive->samples; i++) {
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const char *unit;
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struct sample *sample = dive->sample+i;
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int mkelvin = sample->temperature.mkelvin;
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int sec, deg;
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if (!mkelvin)
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continue;
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sec = sample->time.seconds;
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if (sec < last)
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continue;
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last = sec + 300;
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if (output_units.temperature == FAHRENHEIT) {
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deg = to_F(sample->temperature);
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unit = "F";
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} else {
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deg = to_C(sample->temperature);
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unit = "C";
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}
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plot_text(gc, &tro, sec, mkelvin, "%d %s", deg, unit);
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}
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}
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static void plot_temperature_profile(struct dive *dive, struct graphics_context *gc)
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{
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int i;
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cairo_t *cr = gc->cr;
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int last = 0;
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if (!setup_temperature_limits(dive, gc))
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return;
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cairo_set_source_rgba(cr, 0.2, 0.2, 1.0, 0.8);
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for (i = 0; i < dive->samples; i++) {
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struct sample *sample = dive->sample+i;
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int mkelvin = sample->temperature.mkelvin;
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if (!mkelvin) {
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if (!last)
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continue;
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mkelvin = last;
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}
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if (last)
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line_to(gc, sample->time.seconds, mkelvin);
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else
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move_to(gc, sample->time.seconds, mkelvin);
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last = mkelvin;
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}
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cairo_stroke(cr);
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}
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/* gets both the actual start and end pressure as well as the scaling factors */
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static int get_cylinder_pressure_range(struct dive *dive, struct graphics_context *gc,
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pressure_t *startp, pressure_t *endp)
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{
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int i;
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int min, max;
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gc->leftx = 0; gc->rightx = round_seconds_up(dive->duration.seconds);
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max = 0;
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min = 5000000;
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if (startp)
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startp->mbar = endp->mbar = 0;
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for (i = 0; i < dive->samples; i++) {
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int mbar;
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struct sample *sample = dive->sample + i;
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/* FIXME! We only track cylinder 0 right now */
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if (sample->cylinderindex)
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continue;
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mbar = sample->cylinderpressure.mbar;
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if (!mbar)
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continue;
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if (mbar < min)
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min = mbar;
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if (mbar > max)
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max = mbar;
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}
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if (startp)
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startp->mbar = max;
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if (endp)
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endp->mbar = min;
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if (!max)
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return 0;
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gc->topy = 0; gc->bottomy = max * 1.5;
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return 1;
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}
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static void plot_cylinder_pressure(struct dive *dive, struct graphics_context *gc)
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{
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int i, sec = -1;
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if (!get_cylinder_pressure_range(dive, gc, NULL, NULL))
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return;
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cairo_set_source_rgba(gc->cr, 0.2, 1.0, 0.2, 0.80);
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move_to(gc, 0, dive->cylinder[0].start.mbar);
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for (i = 1; i < dive->samples; i++) {
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int mbar;
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struct sample *sample = dive->sample + i;
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mbar = sample->cylinderpressure.mbar;
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if (!mbar)
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continue;
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sec = sample->time.seconds;
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if (sec <= dive->duration.seconds)
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line_to(gc, sec, mbar);
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}
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/*
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* We may have "surface time" events, in which case we don't go
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* back to dive duration
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*/
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if (sec < dive->duration.seconds)
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line_to(gc, dive->duration.seconds, dive->cylinder[0].end.mbar);
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cairo_stroke(gc->cr);
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}
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/*
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* Return air usage (in liters).
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*/
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static double calculate_airuse(struct dive *dive)
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{
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double airuse = 0;
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int i;
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for (i = 0; i < MAX_CYLINDERS; i++) {
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cylinder_t *cyl = dive->cylinder + i;
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int size = cyl->type.size.mliter;
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double kilo_atm;
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if (!size)
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continue;
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kilo_atm = (cyl->start.mbar - cyl->end.mbar) / 1013250.0;
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/* Liters of air at 1 atm == milliliters at 1k atm*/
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airuse += kilo_atm * size;
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}
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return airuse;
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}
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static void plot_info(struct dive *dive, struct graphics_context *gc)
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{
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text_render_options_t tro = {10, 0.2, 1.0, 0.2, LEFT, TOP};
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const double liters_per_cuft = 28.317;
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const char *unit, *desc;
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double airuse;
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airuse = calculate_airuse(dive);
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if (!airuse)
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return;
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/* I really need to start addign some unit setting thing */
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switch (output_units.volume) {
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case LITER:
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unit = "l";
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break;
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case CUFT:
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unit = "cuft";
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airuse /= liters_per_cuft;
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break;
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}
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plot_text(gc, &tro, 0.8, 0.8, "vol: %4.2f %s", airuse, unit);
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if (dive->duration.seconds) {
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double pressure = 1 + (dive->meandepth.mm / 10000.0);
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double sac = airuse / pressure * 60 / dive->duration.seconds;
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plot_text(gc, &tro, 0.8, 0.85, "SAC: %4.2f %s/min", sac, unit);
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}
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desc = dive->cylinder[0].type.description;
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if (desc || dive->cylinder[0].gasmix.o2.permille) {
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int o2 = dive->cylinder[0].gasmix.o2.permille / 10;
|
|
if (!desc)
|
|
desc = "";
|
|
if (!o2)
|
|
o2 = 21;
|
|
plot_text(gc, &tro, 0.8, 0.9, "%s (%d%%)", desc, o2);
|
|
}
|
|
}
|
|
|
|
static void plot_cylinder_pressure_text(struct dive *dive, struct graphics_context *gc)
|
|
{
|
|
pressure_t startp, endp;
|
|
|
|
if (get_cylinder_pressure_range(dive, gc, &startp, &endp)) {
|
|
int start, end;
|
|
const char *unit = "bar";
|
|
|
|
switch (output_units.pressure) {
|
|
case PASCAL:
|
|
start = startp.mbar * 100;
|
|
end = startp.mbar * 100;
|
|
unit = "pascal";
|
|
break;
|
|
case BAR:
|
|
start = (startp.mbar + 500) / 1000;
|
|
end = (endp.mbar + 500) / 1000;
|
|
unit = "bar";
|
|
break;
|
|
case PSI:
|
|
start = to_PSI(startp);
|
|
end = to_PSI(endp);
|
|
unit = "psi";
|
|
break;
|
|
}
|
|
|
|
text_render_options_t tro = {10, 0.2, 1.0, 0.2, LEFT, TOP};
|
|
plot_text(gc, &tro, 0, startp.mbar, "%d %s", start, unit);
|
|
plot_text(gc, &tro, dive->duration.seconds, endp.mbar,
|
|
"%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 struct plot_info *analyze_plot_info(struct plot_info *pi)
|
|
{
|
|
int i;
|
|
int nr = pi->nr;
|
|
|
|
/* Smoothing function: 5-point triangular smooth */
|
|
for (i = 2; i < nr-2; i++) {
|
|
struct plot_data *entry = pi->entry+i;
|
|
int val;
|
|
|
|
val = entry[-2].val + 2*entry[-1].val + 3*entry[0].val + 2*entry[1].val + entry[2].val;
|
|
entry->smoothed = (val+4) / 9;
|
|
}
|
|
|
|
/* 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 *depth_plot_info(struct dive *dive)
|
|
{
|
|
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;
|
|
for (i = 0; i < dive->samples; i++) {
|
|
struct sample *sample = dive->sample+i;
|
|
struct plot_data *entry = pi->entry + i + 2;
|
|
|
|
sec = entry->sec = sample->time.seconds;
|
|
entry->val = sample->depth.mm;
|
|
}
|
|
/* 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;
|
|
|
|
return analyze_plot_info(pi);
|
|
}
|
|
|
|
static void plot(struct graphics_context *gc, int w, int h, struct dive *dive)
|
|
{
|
|
double topx, topy;
|
|
struct plot_info *pi = depth_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(dive, gc);
|
|
|
|
/* Cylinder pressure plot */
|
|
plot_cylinder_pressure(dive, gc);
|
|
|
|
/* Depth profile */
|
|
plot_depth_profile(dive, gc, pi);
|
|
|
|
/* Text on top of all graphs.. */
|
|
plot_temperature_text(dive, gc);
|
|
plot_depth_text(dive, gc, pi);
|
|
plot_cylinder_pressure_text(dive, gc);
|
|
|
|
/* And info box in the lower right corner.. */
|
|
gc->leftx = 0; gc->rightx = 1.0;
|
|
gc->topy = 0; gc->bottomy = 1.0;
|
|
plot_info(dive, gc);
|
|
|
|
/* Bounding box last */
|
|
cairo_set_source_rgb(gc->cr, 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);
|
|
|
|
}
|
|
|
|
static gboolean expose_event(GtkWidget *widget, GdkEventExpose *event, gpointer data)
|
|
{
|
|
struct dive *dive = current_dive;
|
|
struct graphics_context gc;
|
|
int w,h;
|
|
|
|
w = widget->allocation.width;
|
|
h = widget->allocation.height;
|
|
|
|
gc.cr = gdk_cairo_create(widget->window);
|
|
cairo_set_source_rgb(gc.cr, 0, 0, 0);
|
|
cairo_paint(gc.cr);
|
|
|
|
if (dive)
|
|
plot(&gc, w, h, dive);
|
|
|
|
cairo_destroy(gc.cr);
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
GtkWidget *dive_profile_widget(void)
|
|
{
|
|
GtkWidget *da;
|
|
|
|
da = gtk_drawing_area_new();
|
|
gtk_widget_set_size_request(da, 350, 250);
|
|
g_signal_connect(da, "expose_event", G_CALLBACK(expose_event), NULL);
|
|
|
|
return da;
|
|
}
|