X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;f=lib%2Fdrawer.c;h=1b4f7e9694fdbd3386d7dd4dfdbbcaffc4dede4c;hb=6bc6fbc4e85984fbd471e0410ac0fcbbddbb49c4;hp=d3716574b70fe90e1361349e4048f31a111950ba;hpb=facdbc2c6d5ac9b5d6551690f646355bf11ae58e;p=swftools.git

diff --git a/lib/drawer.c b/lib/drawer.c
index d371657..1b4f7e9 100644
--- a/lib/drawer.c
+++ b/lib/drawer.c
@@ -22,6 +22,7 @@
 
 #include <stdlib.h>
 #include <stdio.h>
+#include <string.h>
 #include <memory.h>
 #include <math.h>
 #include "drawer.h"
@@ -83,6 +84,14 @@ void draw_string(drawer_t*draw, const char*string)
 	    to.y = atoi(getToken(&p));
 	    draw->splineTo(draw, &mid, &to);
 	}
+	else if(!strncmp(token, "conicTo", 5)) {
+	    FPOINT mid,to;
+	    mid.x = atoi(getToken(&p));
+	    mid.y = atoi(getToken(&p));
+	    to.x = atoi(getToken(&p));
+	    to.y = atoi(getToken(&p));
+	    draw_conicTo(draw, &mid, &to);
+	}
 	else if(!strncmp(token, "cubicTo", 5)) {
 	    FPOINT mid1,mid2,to;
 	    mid1.x = atoi(getToken(&p));
@@ -93,7 +102,7 @@ void draw_string(drawer_t*draw, const char*string)
 	    to.y = atoi(getToken(&p));
 	    draw_cubicTo(draw, &mid1, &mid2, &to);
 	}
-	else fprintf(stderr, "drawer: Warning: unknown primitive '%s'", token);
+	else fprintf(stderr, "drawer: Warning: unknown primitive '%s'\n", token);
 	
 	free(token);
     }
@@ -159,6 +168,7 @@ static int approximate3(const struct cspline*s, struct qspline*q, int size, doub
 	char left = 0,recurse=0;
 	int t;
 	int probes = 15;
+	double dx,dy;
 
 	/* create simple approximation: a qspline which run's through the
 	   qspline point at 0.5 */
@@ -193,8 +203,9 @@ static int approximate3(const struct cspline*s, struct qspline*q, int size, doub
 	    test.control.y += test.end.y;
 	}
 
+#define PROBES
+#ifdef PROBES
 	/* measure the spline's accurancy, by taking a number of probes */
-
 	for(t=0;t<probes;t++) {
 	    struct SPLINEPOINT qr1,qr2,cr1,cr2;
 	    double pos = 0.5/(probes*2)*(t*2+1);
@@ -221,6 +232,19 @@ static int approximate3(const struct cspline*s, struct qspline*q, int size, doub
 		recurse=1;break;
 	    }
 	}
+#else // quadratic error: *much* faster!
+
+	/* convert control point representation to 
+	   d*x^3 + c*x^2 + b*x + a */
+	dx= s->end.x  - s->control2.x*3 + s->control1.x*3 - s->start.x;
+	dy= s->end.y  - s->control2.y*3 + s->control1.y*3 - s->start.y;
+	
+	/* use the integral over (f(x)-g(x))^2 between 0 and 1
+	   to measure the approximation quality. 
+	   (it boils down to const*d^2)
+	 */
+	recurse = (dx*dx + dy*dy > quality2);
+#endif
 
 	if(recurse && istep>1 && size-level > num) {
 	    istep >>= 1;
@@ -242,6 +266,10 @@ void draw_cubicTo(drawer_t*draw, FPOINT*  control1, FPOINT* control2, FPOINT*  t
 {
     struct qspline q[128];
     struct cspline c;
+    double quality = 80;
+    double maxerror = (500-(quality*5)>1?500-(quality*5):1)/20.0;
+    int t,num;
+
     c.start.x = draw->pos.x;
     c.start.y = draw->pos.y;
     c.control1.x = control1->x;
@@ -250,11 +278,9 @@ void draw_cubicTo(drawer_t*draw, FPOINT*  control1, FPOINT* control2, FPOINT*  t
     c.control2.y = control2->y;
     c.end.x = to->x;
     c.end.y = to->y;
-    double quality = 80;
-    double maxerror = (500-(quality*5)>1?500-(quality*5):1)/20.0;
+    
+    num = approximate3(&c, q, 128, maxerror*maxerror);
 
-    int num = approximate3(&c, q, 128, maxerror*maxerror);
-    int t;
     for(t=0;t<num;t++) {
 	FPOINT mid;
 	FPOINT to;