On Fri, 27 Apr 2012 23:03:41 +0200, Christina Roßmanith <ChrRossmanith@gmx.de> wrote:Hi,there are two "case XML_RECT" blocks in svgreader.cxx in two different visitors. The ShapeWritingVisitor scales rx and ry with width and height, the ShapeRenderingVisitor does not apply any scaling. I guess both visitors should treat rx and ry the same way?Looking at basegfx::tools::createPolygonFromRect implementation (in basegfx/source/polygon/b2dpoligontools.cxx) the routine expects radii (rx, ry) in the [0,1] range and if not they are cropped to 0 or 1. So the scaled input should be the correct one. However I think it is better if you perform some visual test.
Well, I have thought again to createPolygonFromRect implementation,
because I had the feeling I had missed something.
If rx is the radius how could the value 1 be a valid input ?
In fact rx/width == 1 => rx == width, but the corner radius along
the x-axis should be <= width/2.
These lines from the createPolygonFromRect implementation:
const double fBowX((rRect.getWidth() / 2.0) * fRadiusX);
const double fBowY((rRect.getHeight() / 2.0) * fRadiusY);
confirmed to me that the rx argument is required to be a fraction
of width/2 and the ry argument to be a fraction of height/2.
So the XML_RECT case implementation is wrong in the
ShapeWritingVisitor, too. The passed radii have to be:
rx / (width/2) and ry / (height/2).
In fact, by opening the attached svg file with Inkscape
(or in a browser) and in Draw you can see that corner
rounding is different.
Btw I have no idea which user action the ShapeRenderingVisitor
is triggered by.
Cheers,
-- Marco
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