Merge branch 'horizontals'

[swftools.git] / lib / gfxpoly / wind.h

diff --git a/lib/gfxpoly/wind.h b/lib/gfxpoly/wind.h
index 1dae74e..a07ed64 100644 (file)
--- a/lib/gfxpoly/wind.h
+++ b/lib/gfxpoly/wind.h
@@ -1,7 +1,37 @@
 #ifndef __wind_h__
 #define __wind_h__
 
-#include "poly.h"
+/* Every segment has an original direction, which is the direction
+   the segment had in the input data.
+   as our scanline moves from minimum y to maximum y, "DOWN" means
+   the the (original) segment's y2 is larger than its y1 */
+typedef enum {DIR_UP, DIR_DOWN, DIR_UNKNOWN} segment_dir_t;
+
+#define DIR_INVERT(d) ((d)^(DIR_UP^DIR_DOWN))
+
+typedef struct _edgestyle {
+    void*internal;
+} edgestyle_t;
+
+extern edgestyle_t edgestyle_default;
+
+typedef struct _windstate
+{
+    char is_filled;
+    int wind_nr;
+} windstate_t;
+
+typedef struct _windcontext
+{
+    int num_polygons;
+} windcontext_t;
+
+typedef struct _windrule
+{
+    windstate_t (*start)(windcontext_t* num_polygons);
+    windstate_t (*add)(windcontext_t*context, windstate_t left, edgestyle_t*edge, segment_dir_t dir, int polygon_nr);
+    edgestyle_t* (*diff)(windstate_t*left, windstate_t*right);
+} windrule_t;
 
 extern windrule_t windrule_evenodd;
 extern windrule_t windrule_circular;