added in-line horizontal processing prototype

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

diff --git a/lib/gfxpoly/wind.h b/lib/gfxpoly/wind.h
index e057544..e1926ed 100644 (file)
--- a/lib/gfxpoly/wind.h
+++ b/lib/gfxpoly/wind.h
@@ -1,20 +1,41 @@
 #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* (*add)(windstate_t*left, fillstyle_t*edge, segment_dir_t dir, gfxpoly_t*master);
-    fillstyle_t* (*diff)(windstate_t*left, windstate_t*right);
+    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;
 
-windrule_t* windrule_new_evenodd();
-windrule_t* windrule_new_circular();
+extern windrule_t windrule_evenodd;
+extern windrule_t windrule_circular;
+extern windrule_t windrule_intersect;
+extern windrule_t windrule_union;
 
 #endif