🚀 go-pugleaf

Would it be possible to add canvas member functions to control the
drawing parameters for the style of line joins, line endings, and
filling rules. Since they are available both on X drawables and on
PostScript printers, I think it should be quite easy to add them to
the current implementation.

I suggest the following functionnalities in canvas.h:

enum FillRule { fill_eo, fill_nzw };
enum CapStyle { cap_not_last, cap_butt, cap_round, cap_projecting };
enum JoinStyle { join_miter, join_round, join_bevel };

class Canvas {
public:
...
    virtual void fill_rule(FillRule);
    virtual FillRule fill_rule() const;
    virtual void cap_style(CapStyle);
    virtual CapStyle cap_style() const;
    virtual void join_style(JoinStyle);
    virtual JoinStyle join_style() const;
    virtual void push_gstate();
    virtual void pop_gstate();
...
};

Another choice would be to overload stroke and fill like this:

class Canvas {
public:
...
    virtual void stroke(const Color*, const Brush*);
    virtual void stroke(const Color*, const Brush*, CapStyle, JoinStyle);
....
    virtual void fill(const Color*);
    virtual void fill(const Color*, FillRule);
};

Any comment ?

   ___    0  Jean-Daniel Fekete            uucp  : jdf@lri.lri.fr
  /   \  /   LRI - Bat 490                 bitnet: jdf@FRLRI61.bitnet
 /   _/ /    Universite de Paris-Sud       voice : +33 (1) 69 41 65 91
/__   \/     F-91405 ORSAY Cedex                   +33 (1) 69 41 66 29