plan9port

fork of plan9port with libvec, libstr and libsdb
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line.c (731B)


      1 #include <u.h>
      2 #include <libc.h>
      3 #include <draw.h>
      4 
      5 void
      6 line(Image *dst, Point p0, Point p1, int end0, int end1, int radius, Image *src, Point sp)
      7 {
      8 	lineop(dst, p0, p1, end0, end1, radius, src, sp, SoverD);
      9 }
     10 
     11 void
     12 lineop(Image *dst, Point p0, Point p1, int end0, int end1, int radius, Image *src, Point sp, Drawop op)
     13 {
     14 	uchar *a;
     15 
     16 	_setdrawop(dst->display, op);
     17 
     18 	a = bufimage(dst->display, 1+4+2*4+2*4+4+4+4+4+2*4);
     19 	if(a == 0){
     20 		fprint(2, "image line: %r\n");
     21 		return;
     22 	}
     23 	a[0] = 'L';
     24 	BPLONG(a+1, dst->id);
     25 	BPLONG(a+5, p0.x);
     26 	BPLONG(a+9, p0.y);
     27 	BPLONG(a+13, p1.x);
     28 	BPLONG(a+17, p1.y);
     29 	BPLONG(a+21, end0);
     30 	BPLONG(a+25, end1);
     31 	BPLONG(a+29, radius);
     32 	BPLONG(a+33, src->id);
     33 	BPLONG(a+37, sp.x);
     34 	BPLONG(a+41, sp.y);
     35 }