From d5756a2e0e95b39ddc9025272b6ca1a43db98589 Mon Sep 17 00:00:00 2001
From: Werner Almesberger <werner@almesberger.net>
Date: Sun, 31 Jul 2016 03:17:10 -0300
Subject: [PATCH] sch2fig/cairo.c (cr_text): implement

---
 sch2fig/cairo.c | 34 +++++++++++++++++++++++++++++++++-
 1 file changed, 33 insertions(+), 1 deletion(-)

diff --git a/sch2fig/cairo.c b/sch2fig/cairo.c
index c2caac6..b473a76 100644
--- a/sch2fig/cairo.c
+++ b/sch2fig/cairo.c
@@ -19,6 +19,7 @@
 
 #include "util.h"
 #include "style.h"
+#include "text.h"
 #include "gfx.h"
 #include "cairo.h"
 
@@ -144,7 +145,35 @@ void cr_arc(void *ctx, int x, int y, int r, int sa, int ea,
 void cr_text(void *ctx, int x, int y, const char *s, unsigned size,
     enum text_align align, int rot, unsigned color, unsigned layer)
 {
-//	struct cairo_ctx *cc = ctx;
+	struct cairo_ctx *cc = ctx;
+	cairo_text_extents_t ext;
+	cairo_matrix_t m;
+
+	cairo_set_font_size(cc->cr, cx(size) * 1.3);
+	cairo_text_extents(cc->cr, s, &ext);
+
+	set_color(cc->cr, color);
+
+	cairo_move_to(cc->cr, cx(x), cy(y));
+
+	cairo_get_matrix(cc->cr, &m);
+	cairo_rotate(cc->cr, -rot / 180.0 * M_PI);
+
+	switch (align) {
+	case text_min:
+		break;
+	case text_mid:
+		cairo_rel_move_to(cc->cr, -ext.width / 2.0, 0);
+		break;
+	case text_max:
+		cairo_rel_move_to(cc->cr, -ext.width, 0);
+		break;
+	default:
+		abort();
+	}
+
+	cairo_show_text(cc->cr, s);
+	cairo_set_matrix(cc->cr, &m);
 }
 
 
@@ -158,9 +187,12 @@ void *cr_init(const char *template, int n_vars, const char **vars)
 	cc = alloc_type(struct cairo_ctx);
 	cc->s = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 2000, 1414);
 	cc->cr = cairo_create(cc->s);
+
 	set_color(cc->cr, COLOR_WHITE);
 	cairo_paint(cc->cr);
 
+	cairo_select_font_face(cc->cr, "Helvetica", CAIRO_FONT_SLANT_NORMAL,
+	    CAIRO_FONT_WEIGHT_BOLD);
 	cairo_set_line_width(cc->cr, 3);
 
 	return cc;