tellipse.c - plan9port - [fork] Plan 9 from user space
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       tellipse.c (1966B)
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            1 #include <u.h>
            2 #include <libc.h>
            3 #include <draw.h>
            4 
            5 static
            6 void
            7 doellipse(int cmd, Image *dst, Point *c, int xr, int yr, int thick, Image *src, Point *sp, int alpha, int phi, Drawop op)
            8 {
            9         uchar *a;
           10 
           11         _setdrawop(dst->display, op);
           12 
           13         a = bufimage(dst->display, 1+4+4+2*4+4+4+4+2*4+2*4);
           14         if(a == 0){
           15                 fprint(2, "image ellipse: %r\n");
           16                 return;
           17         }
           18         a[0] = cmd;
           19         BPLONG(a+1, dst->id);
           20         BPLONG(a+5, src->id);
           21         BPLONG(a+9, c->x);
           22         BPLONG(a+13, c->y);
           23         BPLONG(a+17, xr);
           24         BPLONG(a+21, yr);
           25         BPLONG(a+25, thick);
           26         BPLONG(a+29, sp->x);
           27         BPLONG(a+33, sp->y);
           28         BPLONG(a+37, alpha);
           29         BPLONG(a+41, phi);
           30 }
           31 
           32 void
           33 ellipse(Image *dst, Point c, int a, int b, int thick, Image *src, Point sp)
           34 {
           35         doellipse('e', dst, &c, a, b, thick, src, &sp, 0, 0, SoverD);
           36 }
           37 
           38 void
           39 ellipseop(Image *dst, Point c, int a, int b, int thick, Image *src, Point sp, Drawop op)
           40 {
           41         doellipse('e', dst, &c, a, b, thick, src, &sp, 0, 0, op);
           42 }
           43 
           44 void
           45 fillellipse(Image *dst, Point c, int a, int b, Image *src, Point sp)
           46 {
           47         doellipse('E', dst, &c, a, b, 0, src, &sp, 0, 0, SoverD);
           48 }
           49 
           50 void
           51 fillellipseop(Image *dst, Point c, int a, int b, Image *src, Point sp, Drawop op)
           52 {
           53         doellipse('E', dst, &c, a, b, 0, src, &sp, 0, 0, op);
           54 }
           55 
           56 void
           57 arc(Image *dst, Point c, int a, int b, int thick, Image *src, Point sp, int alpha, int phi)
           58 {
           59         alpha |= ((ulong)1)<<31;
           60         doellipse('e', dst, &c, a, b, thick, src, &sp, alpha, phi, SoverD);
           61 }
           62 
           63 void
           64 arcop(Image *dst, Point c, int a, int b, int thick, Image *src, Point sp, int alpha, int phi, Drawop op)
           65 {
           66         alpha |= (ulong)1<<31;
           67         doellipse('e', dst, &c, a, b, thick, src, &sp, alpha, phi, op);
           68 }
           69 
           70 void
           71 fillarc(Image *dst, Point c, int a, int b, Image *src, Point sp, int alpha, int phi)
           72 {
           73         alpha |= (ulong)1<<31;
           74         doellipse('E', dst, &c, a, b, 0, src, &sp, alpha, phi, SoverD);
           75 }
           76 
           77 void
           78 fillarcop(Image *dst, Point c, int a, int b, Image *src, Point sp, int alpha, int phi, Drawop op)
           79 {
           80         alpha |= (ulong)1<<31;
           81         doellipse('E', dst, &c, a, b, 0, src, &sp, alpha, phi, op);
           82 }