ref: 6dce09cec3bf6a689fa9a3f838df67d7d48d9d1a
dir: /libdraw/ellipse.c/
#include "lib9.h" #include "draw.h" static void doellipse(int cmd, Image *dst, Point *c, int xr, int yr, int thick, Image *src, Point *sp, int alpha, int phi, Drawop op) { uchar *a; _setdrawop(dst->display, op); a = bufimage(dst->display, 1+4+4+2*4+4+4+4+2*4+2*4); if(a == 0){ _drawprint(2, "image ellipse: %r\n"); return; } a[0] = cmd; BP32INT(a+1, dst->id); BP32INT(a+5, src->id); BP32INT(a+9, c->x); BP32INT(a+13, c->y); BP32INT(a+17, xr); BP32INT(a+21, yr); BP32INT(a+25, thick); BP32INT(a+29, sp->x); BP32INT(a+33, sp->y); BP32INT(a+37, alpha); BP32INT(a+41, phi); } void ellipse(Image *dst, Point c, int a, int b, int thick, Image *src, Point sp) { doellipse('e', dst, &c, a, b, thick, src, &sp, 0, 0, SoverD); } void ellipseop(Image *dst, Point c, int a, int b, int thick, Image *src, Point sp, Drawop op) { doellipse('e', dst, &c, a, b, thick, src, &sp, 0, 0, op); } void fillellipse(Image *dst, Point c, int a, int b, Image *src, Point sp) { doellipse('E', dst, &c, a, b, 0, src, &sp, 0, 0, SoverD); } void fillellipseop(Image *dst, Point c, int a, int b, Image *src, Point sp, Drawop op) { doellipse('E', dst, &c, a, b, 0, src, &sp, 0, 0, op); } void arc(Image *dst, Point c, int a, int b, int thick, Image *src, Point sp, int alpha, int phi) { alpha |= 1<<31; doellipse('e', dst, &c, a, b, thick, src, &sp, alpha, phi, SoverD); } void arcop(Image *dst, Point c, int a, int b, int thick, Image *src, Point sp, int alpha, int phi, Drawop op) { alpha |= 1<<31; doellipse('e', dst, &c, a, b, thick, src, &sp, alpha, phi, op); } void fillarc(Image *dst, Point c, int a, int b, Image *src, Point sp, int alpha, int phi) { alpha |= 1<<31; doellipse('E', dst, &c, a, b, 0, src, &sp, alpha, phi, SoverD); } void fillarcop(Image *dst, Point c, int a, int b, Image *src, Point sp, int alpha, int phi, Drawop op) { alpha |= 1<<31; doellipse('E', dst, &c, a, b, 0, src, &sp, alpha, phi, op); }