Rasterize loop

1 files changed, 32 insertions, 2 deletions

diff --git a/poly3.c b/poly3.c
index 74b63e9..50cc048 100644
--- a/poly3.c
+++ b/poly3.c
@@ -219,12 +219,11 @@ long_edge_update_error (long_edge_t *edge)
 		edge->e -= edge->delta_e_big_x;
 		edge->common.xi -= fixed_1;
 		edge->common.xi |= (N_GRID_X - 1);
-		goto small;
+		goto begin;
 	    }
 	}
 	else
 	{
-	small:
 	    if (edge->e > edge->delta_e_small_x)
 	    {
 		edge->e -= edge->delta_e_small_x;
@@ -407,6 +406,37 @@ static void
 polygon_rasterize (polygon_t *polygon, int x, int y, int width, int height)
 {
     global_t *global = create_global (polygon, x, y, width, height);
+    active_t *active = create_active (global);
+    sample_t yi = y << FIXED_BITS;
+    sample_t end = (y + height) << FIXED_BITS;
+
+    while (yi < end)
+    {
+	int i, j;
+
+	for (i = 0; i < N_GRID_Y - 1; ++i)
+	{
+	    active = update_active (active, yi);
+
+	    for (j = 0; j < active->n_edges; ++j)
+	    {
+		/* emit yi, edge->xi */
+		/* step_small (edge); */
+	    }
+
+	    yi++;
+	}
+
+	active = update_active (active, yi);
+
+	for (j = 0; j < active->n_edges; ++j)
+	{
+	    /* emit ((y | (N_GRID_Y - 1), edge->xi), */
+	    /* step_big (edge); */
+	}
+
+	yi = fixed_floor (yi + fixed_1);
+    }
 }
 
 int