Add minimal cairo samplecairo

cairo [1] should be used to implement phonelock. This is just some
example code to get started.

[1]: https://www.cairographics.org/

2 files changed, 23 insertions, 3 deletions

diff --git a/Makefile b/Makefile
index f855e96..e9a7956 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@ all: build/phonelock
 
 build/phonelock: main.c
 	mkdir -p build
-	gcc -Wall -o build/phonelock main.c
+	gcc -o build/phonelock -Wall `pkg-config --cflags --libs cairo` main.c
 
 clean:
 	rm -rf build
diff --git a/main.c b/main.c
index 5663924..9a645b5 100644
--- a/main.c
+++ b/main.c
@@ -1,9 +1,29 @@
 
 
+#include <cairo.h>
 #include <stdio.h>
 
 
-int main(void) {
-	printf("Hello world!\n");
+int main(void)
+{
+	printf("Starting phonelock ...");
+
+	cairo_surface_t *surface =
+	    cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 240, 80);
+	cairo_t *cr = cairo_create (surface);
+
+	cairo_select_font_face(cr, "serif", CAIRO_FONT_SLANT_NORMAL,
+	                       CAIRO_FONT_WEIGHT_BOLD);
+	cairo_set_font_size(cr, 32.0);
+	cairo_set_source_rgb(cr, 0.0, 0.0, 1.0);
+	cairo_move_to(cr, 10.0, 50.0);
+	cairo_show_text(cr, "Hello, world");
+
+	cairo_destroy(cr);
+	cairo_surface_write_to_png(surface, "hello.png");
+	cairo_surface_destroy(surface);
+
+	printf(" done!\n");
+
 	return 0;
 }