strokedPath error

[abu-irrational]

Here is a BL::Path made of a simple BL::Arc of 120 degrees.
Then, from this Path I build a strokedPath with a given width (thickness)

As you can see, the stroked-path (p2) has a strange glitch, and it is made of 40 vertices (against 7 vertices of path p1).
Here's a test:
// ------------------------------------------------------------------
BLImage render(const BLContextCreateInfo& cci) {
BLImage img(256, 256, BL_FORMAT_PRGB32);
BLContext ctx(img, cci);

ctx.clearAll();

BLPath p1;

double r = 100.0;
double PI=3.1415;

double r1=r/5*4;
BLArc xa = BLArc(r,0,r1,r1,PI*2/3,PI*2/3);
p1.addArc(xa);

// create a dummyContext
//  it requires a minimal dummyImage, too
//  or you won't be able to set options  (--> error INVALID_STATE)
BLImage dummyImage = BLImage(1,1, BL_FORMAT_A8); 

BLContext dummyCtx( dummyImage );
dummyCtx.setStrokeWidth(r/6);

BLStrokeOptions opt;
BLPath p2;
p2.addStrokedPath(p1,dummyCtx.strokeOptions(),blDefaultApproximationOptions);

ctx.setTransform({1,0,0,1,100,100});
ctx.strokePath(p2, BLRgba32(0xFFFFFF00));

printf("p1 size is %ld\n", p1.size());
printf("p2 size is %ld\n", p2.size());

return img;
}

[kobalicek]

This is unfortunately a limitation of the current stroker (stroking twice just makes it visible).

This should be resolved by the new stroke, which is not ready atm.