From 3e585cade600783e6f405bcceecf0120ade8be64 Mon Sep 17 00:00:00 2001
From: Thomas White <taw@physics.org>
Date: Fri, 3 Jan 2020 21:13:57 +0100
Subject: Version for video

---
 glitchyclock.c | 64 +++++++++++++++++++++++++++++++++++++---------------------
 1 file changed, 41 insertions(+), 23 deletions(-)

diff --git a/glitchyclock.c b/glitchyclock.c
index 89ba8e3..90e2aaa 100644
--- a/glitchyclock.c
+++ b/glitchyclock.c
@@ -21,35 +21,36 @@
 /* Get LED display fonts from here: https://www.keshikan.net/fonts-e.html */
 
 #include <gtk/gtk.h>
+#include <math.h>
 
 struct glitchyclock
 {
 	GtkWidget *da;
 	PangoFontDescription *fontdesc;
 	int nglitch;
-	time_t glitch_base;
+	double glitch_base;
 };
 
 
 const int glitch_times[] = {
-	 7, 15,
+	 4, 15,
 	23, 58,
 	-1, -1
 };
 
 
-static time_t get_monotonic_seconds()
+static double get_monotonic_seconds()
 {
 	struct timespec tp;
 	clock_gettime(CLOCK_MONOTONIC, &tp);
-	return tp.tv_sec;
+	return tp.tv_sec + (double)tp.tv_nsec/1e9;
 }
 
 
 static void do_glitch(struct glitchyclock *gc)
 {
-	if ( glitch_times[2*(gc->nglitch+1)] == -1 ) return;
-	gc->nglitch++;
+	//if ( glitch_times[2*(gc->nglitch+1)] == -1 ) return;
+	//gc->nglitch++;
 	gc->glitch_base = get_monotonic_seconds();
 }
 
@@ -60,10 +61,13 @@ static gboolean draw_sig(GtkWidget *widget, cairo_t *cr, struct glitchyclock *gc
 	int lw, lh;
 	double sf;
 	PangoLayout *layout;
-	const double screen_w_frac = 0.4;
+	const double screen_w_frac = 0.6;
 	int glitch_hours, glitch_minutes;
 	char timestr[64];
-	int seconds;
+	double seconds_f;
+	char col;
+	double seconds_if;
+	int hours, minutes, seconds;
 
 	w = gtk_widget_get_allocated_width(widget);
 	h = gtk_widget_get_allocated_height(widget);
@@ -76,19 +80,33 @@ static gboolean draw_sig(GtkWidget *widget, cairo_t *cr, struct glitchyclock *gc
 	pango_layout_set_alignment(layout, PANGO_ALIGN_CENTER);
 	pango_layout_set_font_description(layout, gc->fontdesc);
 
-	glitch_hours = glitch_times[gc->nglitch*2];
-	glitch_minutes = glitch_times[gc->nglitch*2+1];
-	seconds = get_monotonic_seconds() - gc->glitch_base;
-
-	if ( seconds < 4 ) {
-		strcpy(timestr, "rK:S8");
-	} else {
-		int hours, minutes;
-		hours = (seconds/3600 + glitch_hours) % 24;
-		minutes = (seconds/60 + glitch_minutes) % 60;
-		snprintf(timestr, 63, "%02i:%02i", hours, minutes);
+	seconds_f = get_monotonic_seconds() - gc->glitch_base;
+	col = (modf(seconds_f, &seconds_if) < 0.5) ? ':' : ' ';
+	seconds = seconds_if;
+	if ( seconds > 16 ) seconds = 16;
+
+	hours = (seconds/3600 + 4) % 24;
+	minutes = (seconds/60 + 48) % 60;
+	seconds += 15;
+	snprintf(timestr, 63, "%02i%c%02i%c%02i", hours, col, minutes, col, seconds);
+
+	double duty = 0.5;
+	if ( seconds_f > 17.0 ) {
+		duty = 0.5 + (seconds_f - 17.0)/10.0;
+		if ( duty > 1.0 ) duty = 1.0;
 	}
-	pango_layout_set_text(layout, "88:88", -1);
+	if ( ((seconds_f > 7.1) && (seconds_f < 7.9))
+	  || ((seconds_f > 12.2) && (seconds_f < 13.1))
+	  || ((seconds_f > 17.0)) )
+	{
+		if ( fmod(seconds_f, 0.05) > duty*0.05 ) {
+			strcpy(timestr, "00:rK:c1");
+		} else {
+			strcpy(timestr, "88:v8:68");
+		}
+	}
+
+	pango_layout_set_text(layout, "88:88:88", -1);
 
 	pango_cairo_update_layout(cr, layout);
 	pango_layout_get_size(layout, &lw, &lh);
@@ -100,10 +118,10 @@ static gboolean draw_sig(GtkWidget *widget, cairo_t *cr, struct glitchyclock *gc
 	pango_layout_get_size(layout, &lw, &lh);
 	lw /= PANGO_SCALE;  lh /= PANGO_SCALE;
 	w /= sf;  h /= sf;
-	cairo_translate(cr, (w-lw)/2.0, h-lh);
+	cairo_translate(cr, (w-lw)/2.0, h-lh-20.0);
 	pango_cairo_update_layout(cr, layout);
 
-	cairo_set_source_rgb(cr, 0.04, 0.0, 0.0);
+	cairo_set_source_rgb(cr, 0.10, 0.0, 0.0);
 	pango_cairo_show_layout(cr, layout);
 
 	pango_layout_set_text(layout, timestr, -1);
@@ -174,7 +192,7 @@ int main(int argc, char *argv[])
 	gtk_widget_grab_focus(GTK_WIDGET(gc.da));
 	gtk_widget_show_all(mainwindow);
 
-	g_timeout_add(1000, redraw_cb, &gc);
+	g_timeout_add(20, redraw_cb, &gc);
 
 	gtk_main();
 
-- 
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