x11-xserver-utils/x11perf/do_complex.c

/* $Xorg: do_complex.c,v 1.3 2000/08/17 19:54:09 cpqbld Exp $ */
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Copyright 1988, 1989 by Digital Equipment Corporation, Maynard, Massachusetts.

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Permission to use, copy, modify, and distribute this software and its 
documentation for any purpose and without fee is hereby granted, 
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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******************************************************************************/
/* $XFree86: xc/programs/x11perf/do_complex.c,v 1.8 2001/07/25 15:05:16 dawes Exp $ */

#include "x11perf.h"

#define NUM_POINTS 4    /* 4 points to an arrowhead */
#define NUM_ANGLES 3    /* But mostly it looks like a triangle */
static XPoint   *points;
static GC       pgc;

#include <math.h>
#if defined(QNX4) || defined(__CYGWIN__) || defined(__UNIXOS2__)
#define PI 3.14159265358979323846
#else
#define PI M_PI
#endif /* QNX4 */

int 
InitComplexPoly(XParms xp, Parms p, int reps)
{
    int     i, j, numPoints;
    int     x, y;
    int     size, iradius;
    double  phi, phiinc, radius, delta, phi2;
    XPoint  *curPoint;

    pgc = xp->fggc;

    size = p->special;
    phi = 0.0;
    delta = 2.0 * PI / ((double) NUM_ANGLES);
    if (xp->version == VERSION1_2) {
	radius = ((double) size) * sqrt(3.0)/2.0;
	phiinc = delta/10.0;
    } else {
	/* Version 1.2's radius computation was completely bogus, and resulted
	   in triangles with sides about 50% longer than advertised.  Since
	   in version 1.3 triangles are scaled to cover size^2 pixels, we do
	   the same computation here.  The arrowheads are a little larger than
	   simple triangles, because they lose 1/3 of their area due to the
	   notch cut out from them, so radius has to be sqrt(3/2) larger than
	   for simple triangles.
	 */
	radius = ((double) size) * sqrt(sqrt(4.0/3.0));
	phiinc = 1.75*PI / ((double) p->objects);
    }
    iradius = (int) radius + 1;

    numPoints = (p->objects) * NUM_POINTS;  
    points = (XPoint *)malloc(numPoints * sizeof(XPoint));
    curPoint = points;
    x = iradius;
    y = iradius;
    for (i = 0; i != p->objects; i++) {
	for (j = 0; j != NUM_ANGLES; j++) {
	    phi2 = phi + ((double) j) * delta;
	    curPoint->x = (int) ((double)x + (radius * cos(phi2)) + 0.5);
	    curPoint->y = (int) ((double)y + (radius * sin(phi2)) + 0.5);
	    curPoint++;
	}
	curPoint->x = x;
	curPoint->y = y;
	curPoint++;

	phi += phiinc;
	y += 2 * iradius;
	if (y + iradius >= HEIGHT) {
	    y = iradius;
	    x += 2 * iradius;
	    if (x + iradius >= WIDTH) {
		x = iradius;
	    }
	}
    }
    return reps;
}

void 
DoComplexPoly(XParms xp, Parms p, int reps)
{
    int     i, j;
    XPoint  *curPoint;

    for (i = 0; i != reps; i++) {
        curPoint = points;
        for (j = 0; j != p->objects; j++) {
            XFillPolygon(xp->d, xp->w, pgc, curPoint, NUM_POINTS, Complex, 
			 CoordModeOrigin);
            curPoint += NUM_POINTS;
	  }
        if (pgc == xp->bggc)
            pgc = xp->fggc;
        else
            pgc = xp->bggc;
	CheckAbort ();
    }
}

void 
EndComplexPoly(XParms xp, Parms p)
{
    free(points);
}

int 
InitGeneralPoly(XParms xp, Parms p, int reps)
{
    int     i, j, numPoints;
    int	    nsides;
    int	    x, y;
    int     size, iradius;
    double  phi, phiinc, inner_radius, outer_radius, delta, phi2;
    XPoint  *curPoint;

    pgc = xp->fggc;
    size = p->special;
    nsides = (long) p->font;
    phi = 0.0;
    delta = 2.0 * PI / ((double) nsides);
    phiinc = delta / 10.0;

    inner_radius = size / sqrt (nsides * tan (PI / nsides));
    outer_radius = inner_radius / cos (PI / (2 * nsides));
    numPoints = p->objects * nsides;
    points = (XPoint *) malloc (numPoints * sizeof (XPoint));
    curPoint = points;
    iradius = outer_radius + 1;
    x = iradius;
    y = iradius;
    for (i = 0; i < p->objects; i++) {
	phi2 = phi;
	for (j = 0; j < nsides; j++) {
	    curPoint->x = x + (outer_radius * cos(phi2) + 0.5);
	    curPoint->y = y + (outer_radius * sin(phi2) + 0.5);
	    curPoint++;
	    phi2 += delta;
	}
	phi += phiinc;
	y += 2 * iradius;
	if (y + iradius >= HEIGHT) {
	    y = iradius;
	    x += 2 * iradius;
	    if (x + iradius >= WIDTH) {
		x = iradius;
	    }
	}
    }
    return reps;
}

void 
DoGeneralPoly(XParms xp, Parms p, int reps)
{
    int     i, j;
    int	    nsides;
    int	    mode;
    XPoint  *curPoint;

    nsides = (long) p->font;
    mode = (long) p->bfont;
    for (i = 0; i != reps; i++) {
        curPoint = points;
        for (j = 0; j != p->objects; j++) {
            XFillPolygon(xp->d, xp->w, pgc, curPoint, nsides, mode, 
			 CoordModeOrigin);
            curPoint += nsides;
	  }
        if (pgc == xp->bggc)
            pgc = xp->fggc;
        else
            pgc = xp->bggc;
	CheckAbort ();
    }
}