X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;f=lib%2Fgfxpoly%2Fconvert.c;h=9d8ecab32508ab806916ff7aab4880d2eb4a13b1;hb=be6d3cbb485c5f7e9dd6fe22bf54245c79b10b71;hp=3d9763bd99b0fdef0b0ab139e78765858931b80f;hpb=e0a27e1bd83ff2d60745dd6030e0f5ef7ef97b82;p=swftools.git

diff --git a/lib/gfxpoly/convert.c b/lib/gfxpoly/convert.c
index 3d9763b..9d8ecab 100644
--- a/lib/gfxpoly/convert.c
+++ b/lib/gfxpoly/convert.c
@@ -264,6 +264,7 @@ typedef struct _polydraw_internal
 {
     double lx, ly;
     int32_t lastx, lasty;
+    int32_t x0, y0;
     double z;
     char last;
     polywriter_t writer;
@@ -279,6 +280,8 @@ static void polydraw_moveTo(gfxdrawer_t*d, gfxcoord_t _x, gfxcoord_t _y)
     }
     i->lx = _x;
     i->ly = _y;
+    i->x0 = x;
+    i->y0 = y;
     i->lastx = x;
     i->lasty = y;
     i->last = 1;
@@ -332,6 +335,21 @@ static void polydraw_splineTo(gfxdrawer_t*d, gfxcoord_t sx, gfxcoord_t sy, gfxco
     i->lasty = ny;
     i->last = 1;
 }
+static void polydraw_close(gfxdrawer_t*d)
+{
+    polydraw_internal_t*i = (polydraw_internal_t*)d->internal;
+    assert(!(i->last && (i->x0 == INVALID_COORD || i->y0 == INVALID_COORD)));
+    if(!i->last)
+	return;
+    if(i->lastx != i->x0 || i->lasty != i->y0) {
+	i->writer.lineto(&i->writer, i->x0, i->y0);
+	i->lastx = i->x0;
+	i->lasty = i->y0;
+    }
+    i->last = 0;
+    i->x0 = INVALID_COORD;
+    i->y0 = INVALID_COORD;
+}
 static void* polydraw_result(gfxdrawer_t*d)
 {
     polydraw_internal_t*i = (polydraw_internal_t*)d->internal;
@@ -345,17 +363,21 @@ void gfxdrawer_target_poly(gfxdrawer_t*d, double gridsize)
 {
     polydraw_internal_t*i = (polydraw_internal_t*)rfx_calloc(sizeof(polydraw_internal_t));
     d->internal = i;
-    i->lastx = 0x7fffffff; // convert_coord can never return this value
-    i->lasty = 0x7fffffff;
+    i->lastx = INVALID_COORD; // convert_coord can never return this value
+    i->lasty = INVALID_COORD;
+    i->x0 = INVALID_COORD;
+    i->y0 = INVALID_COORD;
     d->moveTo = polydraw_moveTo;
     d->lineTo = polydraw_lineTo;
     d->splineTo = polydraw_splineTo;
+    d->close = polydraw_close;
     d->result = polydraw_result;
     gfxpolywriter_init(&i->writer);
     i->writer.setgridsize(&i->writer, gridsize);
     i->z = 1.0 / gridsize;
 }
 
+#if 0
 gfxline_t*gfxline_from_gfxpoly(gfxpoly_t*poly)
 {
     gfxpolystroke_t*stroke;
@@ -382,6 +404,91 @@ gfxline_t*gfxline_from_gfxpoly(gfxpoly_t*poly)
     l[count-1].next = 0;
     return l;
 }
+#endif
+
+gfxline_t*gfxline_from_gfxpoly(gfxpoly_t*poly)
+{
+    gfxpolystroke_t*stroke;
+    int count = 0;
+    if(!poly->strokes)
+	return 0;
+    dict_t*d = dict_new2(&point_type);
+    dict_t*todo = dict_new2(&ptr_type);
+    gfxpolystroke_t*stroke_min= poly->strokes;
+    int32_t y_min=stroke_min->points[0].y;
+    for(stroke=poly->strokes;stroke;stroke=stroke->next) {
+	dict_put(todo, stroke, stroke);
+	assert(stroke->num_points>1);
+	count += stroke->num_points;
+	if(stroke->dir == DIR_UP) {
+	    dict_put(d, &stroke->points[stroke->num_points-1], stroke);
+	} else {
+	    dict_put(d, &stroke->points[0], stroke);
+	}
+	if(stroke->points[0].y < y_min) {
+	    y_min = stroke->points[0].y;
+	    stroke_min = stroke;
+	}
+    }
+    gfxpolystroke_t*next_todo = poly->strokes;
+    gfxline_t*l = malloc(sizeof(gfxline_t)*count);
+    count = 0;
+    stroke = stroke_min;
+    
+    point_t last = {INVALID_COORD, INVALID_COORD};
+    char should_connect = 0;
+    while(stroke) {
+	assert(dict_contains(todo, stroke));
+	int t;
+	int pos = 0;
+	int incr = 1;
+	if(stroke->dir == DIR_UP) {
+	    pos = stroke->num_points-1;
+	    incr = -1;
+	}
+	/* TODO: keeping the up/down order intact increases the polygon size
+	         considerably. If this is going to be an even/odd polygon,
+		 we could ignore it and save some space */
+	if(last.x != stroke->points[pos].x || last.y != stroke->points[pos].y) {
+	    l[count].x = stroke->points[pos].x * poly->gridsize;
+	    l[count].y = stroke->points[pos].y * poly->gridsize;
+	    l[count].type = gfx_moveTo;
+	    l[count].next = &l[count+1];
+	    count++;
+	    assert(!should_connect);
+	}
+	pos += incr;
+	for(t=1;t<stroke->num_points;t++) {
+	    l[count].x = stroke->points[pos].x * poly->gridsize;
+	    l[count].y = stroke->points[pos].y * poly->gridsize;
+	    l[count].type = gfx_lineTo;
+	    l[count].next = &l[count+1];
+	    count++;
+	    pos += incr;
+	}
+	last = stroke->points[pos-incr];
+	char del = dict_del(todo, stroke);
+	assert(del);
+	assert(!dict_contains(todo, stroke));
+
+	/* try to find a poly which starts at the point we drew last */
+	stroke = dict_lookup(d, &last);
+	should_connect = 1;
+	while(!dict_contains(todo, stroke)) {
+	    should_connect = 0;
+	    stroke = next_todo;
+	    if(!next_todo) {
+		stroke = 0;
+		break;
+	    }
+	    next_todo = next_todo->next;
+	}
+    }
+    l[count-1].next = 0;
+    dict_destroy(todo);
+    dict_destroy(d);
+    return l;
+}
 
 static windcontext_t onepolygon = {1};
 gfxline_t* gfxpoly_circular_to_evenodd(gfxline_t*line, double gridsize)