From ecb9dc67c50139e29a23a2406e11efd70f123dea Mon Sep 17 00:00:00 2001
From: Carl Worth <cworth@cworth.org>
Date: Fri, 8 Nov 2013 16:18:58 -0800
Subject: [PATCH] Add SVG export.

This is cheesy for now, (using a hard-coded output filename).
---
 acre-x.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/acre-x.c b/acre-x.c
index 80b86de..e62c596 100644
--- a/acre-x.c
+++ b/acre-x.c
@@ -24,6 +24,8 @@
 #include <inttypes.h>
 
 #include <X11/Xlib.h>
+
+#include <cairo-svg.h>
 #include <cairo-xlib.h>
 
 #include "acre.h"
@@ -117,6 +119,24 @@ draw (Display *dpy, Window window, Visual *visual, acre_t *acre,
 	cairo_surface_destroy (surface);
 }
 
+static void
+draw_svg (acre_t *acre, int width, int height, double x_min, double x_max)
+{
+	cairo_t *cr;
+	cairo_surface_t *surface;
+
+	surface = cairo_svg_surface_create ("acre-fips.svg", width, height);
+
+	cr = cairo_create (surface);
+
+	acre_set_x_axis_range (acre, x_min, x_max);
+	acre_draw (acre, cr, width, height);
+
+	cairo_destroy (cr);
+
+	cairo_surface_destroy (surface);
+}
+
 
 static void
 handle_events(Display *dpy, Window window, Visual *visual,
@@ -131,6 +151,7 @@ handle_events(Display *dpy, Window window, Visual *visual,
         KeyCode equal_code = XKeysymToKeycode (dpy, XStringToKeysym("equal"));
         KeyCode minus_code = XKeysymToKeycode (dpy, XStringToKeysym("minus"));
         KeyCode home_code = XKeysymToKeycode (dpy, XStringToKeysym("Home"));
+        KeyCode svg_code = XKeysymToKeycode (dpy, XStringToKeysym("S"));
 	KeyCode keycode;
 	bool need_redraw = false;
 	double x_min, x_max, shift;
@@ -183,6 +204,11 @@ handle_events(Display *dpy, Window window, Visual *visual,
 			{
 				acre_get_x_axis_data_range (acre, &x_min, &x_max);
 			}
+			else if (keycode == svg_code)
+			{
+				need_redraw = false;
+				draw_svg (acre, width, height, x_min, x_max);
+			}
 			else
 			{
 				need_redraw = false;
-- 
2.43.0