Pentagon

1 files changed, 23 insertions, 5 deletions

diff --git a/poly.c b/poly.c
index 14c93c1..129b088 100644
--- a/poly.c
+++ b/poly.c
@@ -20,6 +20,12 @@ typedef pixman_fixed_16_16_t	fixed_t;
 #define fixed_to_double(f)	(double) ((f) / (double) pixman_fixed_1)
 #define double_to_fixed(d)	((pixman_fixed_t) ((d) * 65536.0))
 
+typedef enum
+{
+    WINDING,
+    EVEN_ODD
+} fill_rule_t;
+
 
 /*
  *    +--------------------------------------------------+
@@ -174,29 +180,41 @@ compare_edges (const void *e1, const void *e2)
 }
 
 static void
-scan_convert (int n_edges, edge_t *edges)
+scan_convert (int n_edges, edge_t *edges, fill_rule_t fill_rule)
 {
-    /* First sort the edges according to scanline, then according to
-     * X subpixel position.
+    int i;
+    
+    /* First sort the edges
      */
     qsort (edges, n_edges, sizeof (edge_t), compare_edges);
-    
-    
+
 }
 
+#define df(a) pixman_double_to_fixed(a)
 
 int
 main (int argc, char **argv)
 {
+    edge_t pentagon[] = {
+	{ df  (2.2), df (10.2), df (11.3),  df (2.2) },
+	{ df (11.3), df  (2.2), df (15.7),  df (5.5) },
+	{ df (15.7), df  (5.5), df (20.8), df (15.8) },
+	{ df (20.8), df (15.8), df (13.2), df (25.2) },
+	{ df (13.2), df (25.2), df (2.2),  df (10.2) } };
+    
     gtk_init (&argc, &argv);
 
+    scan_convert (5, pentagon, WINDING);
+    
     
+#if 0
     ddda (0.5, 0.5, 2.5, 1.6);
     ddda (0.3, 0.2, 3.7, 2.2);
     ddda (3.7, 2.2, 7.2, 2.8);
     ddda (3.7, 2.2, 4.2, 7.2);
     ddda (0.5, 0.5, 1.5, 1.5);
     ddda (0.5, 0.5, 2.5, 2.5);
+#endif
     
     return 0;
 }