Convert test cases from C to C++

1 files changed, 44 insertions, 0 deletions

diff --git a/src/stroke.cpp b/src/stroke.cpp
new file mode 100644
index 0000000..2959125
--- /dev/null
+++ b/src/stroke.cpp
@@ -0,0 +1,44 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <cairo.h>
+
+void
+randomize_color(cairo_t *cr)
+{
+  double red, green, blue, alpha;
+
+  red = (double)rand()/RAND_MAX;
+  green = (double)rand()/RAND_MAX;
+  blue = (double)rand()/RAND_MAX;
+  alpha = (double)rand()/RAND_MAX;
+
+  cairo_set_source_rgba (cr, red, green, blue, alpha);
+}
+
+int
+main(int argc, char *argv[]) {
+  int i, x, w, prev_w;
+  cairo_surface_t *surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 800, 80);
+  cairo_t *cr = cairo_create (surface);
+
+  srand(0xdeadbeef);
+
+  x = 0;
+  prev_w = 0;
+  for (i=0; i<32; i++) {
+    randomize_color (cr);
+    w = (32.0*rand())/RAND_MAX + 1;
+    x += 4 + (prev_w + w)/2.0;
+    cairo_move_to (cr, x, 10);
+    cairo_line_to (cr, x, 70);
+    cairo_set_line_width (cr, w);
+    cairo_stroke (cr);
+    prev_w = w;
+  }
+
+  cairo_destroy (cr);
+  cairo_surface_write_to_png (surface, "hello.png");
+  cairo_surface_destroy (surface);
+  return 0;
+}
+