From: telephil9@gmail.com
To: 9front@9front.org
Cc: telephil9@gmail.com
Subject: [9front] [PATCH] libdraw: add bezierpts
Date: Fri, 01 Jan 2021 16:53:31 +0100 [thread overview]
Message-ID: <517CFBCF8E3172A9CDB922A8128A4AE8@gmail.com> (raw)
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
next reply other threads:[~2021-01-01 15:54 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-01 15:53 telephil9 [this message]
2021-01-06 20:13 ` [9front] " telephil9
2021-01-06 20:51 ` ori
2021-01-06 21:04 ` telephil9
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