numerous bigfixes in stroke->polygon conversion

[swftools.git] / lib / gfxtools.c

diff --git a/lib/gfxtools.c b/lib/gfxtools.c
index 0c9e2ab..f754379 100644 (file)
--- a/lib/gfxtools.c
+++ b/lib/gfxtools.c
@@ -62,9 +62,10 @@ static void linedraw_lineTo(gfxdrawer_t*d, gfxcoord_t x, gfxcoord_t y)
     gfxline_t*l = (gfxline_t*)rfx_alloc(sizeof(gfxline_t));
 
     if(!i->start) {
-       /* starts with a line, not with a moveto. That needs we first
-          need an explicit moveto to (0,0) */
-       linedraw_moveTo(d, 0, 0);
+       /* starts with a line, not with a moveto. As this is the first
+          entry in the list, this is probably *meant* to be a moveto */
+       linedraw_moveTo(d, x, y);
+       return;
     }
 
     l->type = gfx_lineTo;
@@ -84,9 +85,9 @@ static void linedraw_splineTo(gfxdrawer_t*d, gfxcoord_t sx, gfxcoord_t sy, gfxco
     gfxline_t*l = (gfxline_t*)rfx_alloc(sizeof(gfxline_t));
 
     if(!i->start) {
-       /* starts with a line, not with a moveto. That needs we first
-          need an explicit moveto to (0,0) */
-       linedraw_moveTo(d, 0, 0);
+       fprintf(stderr, "Error: drawing startpoint is a spline\n");
+       linedraw_moveTo(d, x, y);
+       return;
     }
 
     l->type = gfx_splineTo;
@@ -203,7 +204,13 @@ void gfxtool_draw_dashed_line(gfxdrawer_t*d, gfxline_t*line, float*r, float phas
        fprintf(stderr, "gfxtool: outline doesn't start with a moveTo");
        return;
     }
-    if(!r || (r[0]<=0 && r[0]>-0.01)) {
+    
+    int i;
+    double dashlen=0;
+    for(i=0;r[i]>=0;i++) {
+        dashlen+=r[i];
+    }
+    if(!r || (r[0]<=0 && r[0]>-0.01) || dashlen<0.001) {
         // no dashing. just draw the thing
         while(line) {
             if(line->type == gfx_moveTo) {
@@ -222,7 +229,6 @@ void gfxtool_draw_dashed_line(gfxdrawer_t*d, gfxline_t*line, float*r, float phas
        return;
     }
 
-
     for(;line;line=line->next) {
        if(line->type == gfx_moveTo) {
            d->moveTo(d, line->x, line->y);
@@ -829,6 +835,42 @@ gfxline_t*gfxline_makerectangle(int x1,int y1,int x2, int y2)
     return line;
 }
 
+gfxline_t*gfxline_makecircle(double x,double y,double rx, double ry)
+{
+    double C1 = 0.2930;    
+    double C2 = 0.4140;   
+    double begin = 0.7070; 
+    gfxline_t** line = (gfxline_t**)rfx_calloc(sizeof(gfxline_t*)*9);
+    int t;
+    for(t=0;t<9;t++) {
+       line[t] = rfx_calloc(sizeof(gfxline_t));
+    }
+    line[0]->type = gfx_moveTo;
+    line[0]->x = x+begin*rx;
+    line[0]->y = y+begin*ry;
+    for(t=1;t<9;t++) {
+       line[t-1]->next = line[t];
+       line[t]->type = gfx_splineTo;
+    }
+    line[8]->next = 0;
+#define R(nr,cx,cy,mx,my) \
+    line[nr]->sx = line[nr-1]->x + (cx); \
+    line[nr]->sy = line[nr-1]->y + (cy); \
+    line[nr]->x = line[nr]->sx + (mx); \
+    line[nr]->y = line[nr]->sy + (my);
+    R(1, -C1*rx,  C1*ry, -C2*rx,      0);
+    R(2, -C2*rx,      0, -C1*rx, -C1*ry);
+    R(3, -C1*rx, -C1*ry,      0, -C2*ry);
+    R(4,      0, -C2*ry,  C1*rx, -C1*ry);
+    R(5,  C1*rx, -C1*ry,  C2*rx,      0);
+    R(6,  C2*rx,      0,  C1*rx,  C1*ry);
+    R(7,  C1*rx,  C1*ry,      0,  C2*ry);
+    R(8,      0,  C2*ry, -C1*rx,  C1*ry);
+    gfxline_t*l = line[0];
+    free(line);
+    return l;
+}
+
 gfxbbox_t* gfxline_isrectangle(gfxline_t*_l)
 {
     if(!_l)