small bugfixes and memory optimizations

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

diff --git a/lib/gfxpoly/poly.h b/lib/gfxpoly/poly.h
index 6314935..417c6c1 100644 (file)
--- a/lib/gfxpoly/poly.h
+++ b/lib/gfxpoly/poly.h
@@ -3,9 +3,14 @@
 
 #include <stdint.h>
 #include "../q.h"
+#include "../types.h"
 
-typedef enum {DIR_UP, DIR_DOWN} segment_dir_t;
-typedef enum {EVENT_CROSS, EVENT_END, EVENT_HORIZONTAL, EVENT_START} eventtype_t;
+//#define DEBUG
+#define CHECKS
+#define SPLAY
+
+typedef enum {DIR_UP, DIR_DOWN, DIR_UNKNOWN} segment_dir_t;
+typedef enum {EVENT_CROSS, EVENT_END, EVENT_START, EVENT_HORIZONTAL} eventtype_t;
 typedef enum {SLOPE_POSITIVE, SLOPE_NEGATIVE} slope_t;
 
 typedef struct _point {
@@ -17,50 +22,106 @@ typedef struct _fillstyle {
     char is_filled;
 } fillstyle_t;
 
-typedef struct _edge {
-    point_t a;
-    point_t b;
-    fillstyle_t*style;
-    struct _edge *next;
-} edge_t;
+typedef struct _windstate
+{
+    char is_filled;
+    int wind_nr;
+} windstate_t;
+
+/* TODO: maybe we should merge windcontext and windrule */
+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, fillstyle_t*edge, segment_dir_t dir, int polygon_nr);
+    fillstyle_t* (*diff)(windstate_t*left, windstate_t*right);
+} windrule_t;
+
+#define SEGNR(s) ((s)?(s)->nr:-1)
+
+typedef struct _gfxpolystroke {
+    segment_dir_t dir;
+    int num_points;
+    point_t*points;
+    fillstyle_t*fs;
+    struct _gfxpolystroke*next;
+} gfxpolystroke_t;
+typedef struct _gfxpoly {
+    double gridsize;
+    gfxpolystroke_t*strokes;
+} gfxpoly_t;
 
 typedef struct _segment {
     point_t a;
     point_t b;
     point_t delta;
     double k; //k = a.x*b.y-a.y*b.x = delta.y*a.x - delta.x*a.y (=0 for points on the segment)
+    int32_t minx, maxx;
     
     segment_dir_t dir;
-    fillstyle_t*style;
+    fillstyle_t*fs;
+    fillstyle_t*fs_out;
+#ifdef CHECKS
+    char fs_out_ok;
+#endif
+    
+    int polygon_nr;
+    windstate_t wind;
+    ptroff_t nr;
 
-    int nr;
+#ifdef SPLAY
+    struct _segment*parent;
+    struct _segment*leftchild;
+    struct _segment*rightchild;
+#endif
     struct _segment*left;
     struct _segment*right;
-    
+    char changed;
+
     point_t pos;
-    point_t new_point;
-    point_t new_pos;
+
+    gfxpolystroke_t*stroke;
+    int stroke_pos;
 
     dict_t scheduled_crossings;
 } segment_t;
 
 #define LINE_EQ(p,s) ((double)(s)->delta.y*(p).x - (double)(s)->delta.x*(p).y - (s)->k)
-#define XPOS(s,ypos) ((s)->a.x + ceil(((s)->delta.x * (double)((ypos) - (s)->a.y)) / (s)->delta.y))
 
-typedef edge_t gfxpoly_t;
-gfxpoly_t* gfxpoly_new();
+/* x1 + ((x2-x1)*(y-y1)) / dy = 
+   (x1*(y2-y1) + (x2-x1)*(y-y1)) / dy =
+   (x1*(y2-y)  +  x2    *(y-y1)) / dy =
+   (x1*y2 - x2*y1 + x2*y - y*x1) / dy =
+   (k + x2*y - x1*y) / dy
+   (k + dx*y) / dy
+*/
+//#define XPOS(s,ypos) ((s)->a.x + ((s)->delta.x * (double)((ypos) - (s)->a.y)) / (s)->delta.y)
+#define XPOS(s,ypos) (((s)->k + (double)(s)->delta.x*ypos) / (s)->delta.y)
+
+#define XPOS_INT(s,ypos) ((int)ceil(XPOS((s),ypos)))
+#define XDIFF(s1,s2,ypos) (((s1)->k + (double)(s1)->delta.x*ypos)*(s2)->delta.y - \
+                           ((s2)->k + (double)(s2)->delta.x*ypos)*(s1)->delta.y)
+
+void gfxpoly_fail(char*expr, char*file, int line, const char*function);
+
+char gfxpoly_check(gfxpoly_t*poly);
+int gfxpoly_size(gfxpoly_t*poly);
 void gfxpoly_dump(gfxpoly_t*poly);
-gfxpoly_t* gfxpoly_process(gfxpoly_t*poly);
-
-typedef struct _event {
-    eventtype_t type;
-    point_t p;
-    segment_t*s1;
-    segment_t*s2;
-} event_t;
-
-void segment_init(segment_t*s, int32_t x1, int32_t y1, int32_t x2, int32_t y2);
-segment_t*segment_new(int32_t x1, int32_t y1, int32_t x2, int32_t y2);
-void segment_insert_before(segment_t**list, segment_t*add);
+void gfxpoly_save(gfxpoly_t*poly, const char*filename);
+gfxpoly_t* gfxpoly_process(gfxpoly_t*poly, windrule_t*windrule, windcontext_t*context);
+
+#ifndef CHECKS
+#ifdef assert
+#undef assert
+#endif
+#define assert(x)
+#else
+#define assert(x) ((x)?0:gfxpoly_fail(__STRING(x), __FILE__, __LINE__, __PRETTY_FUNCTION__))
+#endif
+
 
 #endif