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From: telephil9@gmail.com
To: 9front@9front.org, telephil9@gmail.com
Cc: 9front@9front.org
Subject: [9front] Re: [PATCH] libdraw: add bezierpts
Date: Wed, 06 Jan 2021 21:13:27 +0100	[thread overview]
Message-ID: <4B76AD7B3AC5B196F7B00CE810077C1D@gmail.com> (raw)
In-Reply-To: <517CFBCF8E3172A9CDB922A8128A4AE8@gmail.com>

Hi,

It seems my mail has gone unnocited.
Ping ?

Thanks

--phil

Quoth telephil9@gmail.com:
> Hi,
> 
> Happy new year to everyone!
> 
> This patch exposes a new bezierpts function similar to the current bezsplinepts.
> Note that this merely makes it visible as it was already present in libdraw.
> ===
> diff -r f020e57da8d6 sys/include/draw.h
> --- a/sys/include/draw.h	Thu Dec 17 20:26:38 2020 -0800
> +++ b/sys/include/draw.h	Fri Jan 01 16:48:33 2021 +0100
> @@ -436,6 +436,7 @@
>  extern Point	stringsubfont(Image*, Point, Image*, Subfont*, char*);
>  extern int		bezier(Image*, Point, Point, Point, Point, int, int, int, Image*, Point);
>  extern int		bezierop(Image*, Point, Point, Point, Point, int, int, int, Image*, Point, Drawop);
> +extern int		bezierpts(Point, Point, Point, Point, Point**);
>  extern int		bezspline(Image*, Point*, int, int, int, int, Image*, Point);
>  extern int		bezsplineop(Image*, Point*, int, int, int, int, Image*, Point, Drawop);
>  extern int		bezsplinepts(Point*, int, Point**);
> diff -r f020e57da8d6 sys/src/libdraw/bezier.c
> --- a/sys/src/libdraw/bezier.c	Thu Dec 17 20:26:38 2020 -0800
> +++ b/sys/src/libdraw/bezier.c	Fri Jan 01 16:48:33 2021 +0100
> @@ -98,12 +98,23 @@
>  }
>  
>  static void
> -bezierpts(Plist *l, Point p0, Point p1, Point p2, Point p3)
> +_bezierpts(Plist *l, Point p0, Point p1, Point p2, Point p3)
>  {
>  	bpts(l, p0, p1, p2, p3);
>  	appendpt(l, p3);
>  }
>  
> +int
> +bezierpts(Point p0, Point p1, Point p2, Point p3, Point **pp)
> +{
> +	Plist l;
> +	l.p = nil;
> +	l.np = 0;
> +	_bezierpts(&l, p0, p1, p2, p3);
> +	*pp = l.p;
> +	return l.np;
> +}
> +
>  static void
>  _bezsplinepts(Plist *l, Point *pt, int npt)
>  {
> @@ -167,7 +178,7 @@
>  	Plist l;
>  
>  	l.np = 0;
> -	bezierpts(&l, p0, p1, p2, p3);
> +	_bezierpts(&l, p0, p1, p2, p3);
>  	if(l.np == -1)
>  		return 0;
>  	if(l.np != 0){
> @@ -211,7 +222,7 @@
>  	Plist l;
>  
>  	l.np = 0;
> -	bezierpts(&l, p0, p1, p2, p3);
> +	_bezierpts(&l, p0, p1, p2, p3);
>  	if(l.np == -1)
>  		return 0;
>  	if(l.np != 0){
> ===
> 
> Updated man page:
> ===
> diff -r f020e57da8d6 sys/man/2/draw
> --- a/sys/man/2/draw	Thu Dec 17 20:26:38 2020 -0800
> +++ b/sys/man/2/draw	Fri Jan 01 16:49:11 2021 +0100
> @@ -103,6 +103,8 @@
>  		int end0, int end1, int radius, Image *src, Point sp,
>  		Drawop op)
>  .PB
> +int	bezierpts(Point p0, Point p1, Point p2, Point p3, Point **pp)
> +.PB
>  int	bezspline(Image *dst, Point *pt, int npt, int end0, int end1,
>  		int radius, Image *src, Point sp)
>  .PB
> @@ -603,6 +605,16 @@
>  in
>  .IR dst .
>  .TP
> +\f5bezierpts(\f2a\fP, \f2b\fP, \f2c\fP, \f2d\fP, \f2pp\fP)
> +.I Bezierpts
> +returns in
> +.I pp
> +a list of points making up the open polygon that
> +.I bezier
> +would draw.
> +The caller is responsible for freeing
> +.IR *pp .
> +.TP
>  \f5bezspline(\f2dst\fP, \f2p\fP, \f2np\fP, \f2end0\fP, \f2end1\fP, \f2thick\fP, \f2src\fP, \f2sp\fP)
>  .I Bezspline
>  takes the same arguments as
> ===
> 
> --phil

  reply	other threads:[~2021-01-06 20:45 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-01 15:53 [9front] " telephil9
2021-01-06 20:13 ` telephil9 [this message]
2021-01-06 20:51   ` [9front] " ori
2021-01-06 21:04     ` telephil9

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