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

                        All Rights Reserved

Permission to use, copy, modify, and distribute this software and its 
documentation for any purpose and without fee is hereby granted, 
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in 
supporting documentation, and that the name of Digital not be
used in advertising or publicity pertaining to distribution of the
software without specific, written prior permission.  

DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
SOFTWARE.

******************************************************************************/
/* $XFree86$ */

#include "x11perf.h"

static XArc *arcs;
static GC   pgc;

#define DegreesToX(degrees) (degrees * 64)

static void 
GenerateCircles(XParms xp, Parms p, Bool partialArcs, Bool ddashed)
{
    int     i;
    int     rows;       /* Number of rows filled in current column	    */
    int     x, y;       /* base of square to draw the circle in		    */
    int     xorg, yorg; /* Used to get from column to column or row to row  */
    int     size;
    int     half;
    int     startAngle, arcAngle;

    if(ddashed)
	pgc = xp->ddfggc;
    else
	pgc = xp->fggc;

    size = p->special;
    half = (size + 19) / 20;
    arcs = (XArc *)malloc((p->objects) * sizeof(XArc));
    x = xorg = half; y = yorg = half;
    rows = 0;
    startAngle = DegreesToX(0);
    arcAngle = DegreesToX(360);

    for (i = 0; i != p->objects; i++) {    
	arcs[i].x = x;
	arcs[i].y = y;
	arcs[i].width = size;
	arcs[i].height = size;
	arcs[i].angle1 = startAngle;
	arcs[i].angle2 = arcAngle;

	if (partialArcs) {
	    startAngle += DegreesToX(30);
	    if (startAngle >= DegreesToX(360)) startAngle -= DegreesToX(360);
	    arcAngle -= DegreesToX(20);
	    if (arcAngle <= DegreesToX(0)) arcAngle += DegreesToX(360);
	}

	y += size + 1;
	rows++;
	if (y >= HEIGHT - size  - half || rows == MAXROWS) {
	    /* Go to next column */
	    rows = 0;
	    x += size + 1;
	    if (x >= WIDTH - size) {
		yorg++;
		if (yorg >= size + half || yorg >= HEIGHT - size - half) {
		    yorg = half;
		    xorg++;
		    if (xorg >= size + half || xorg >= WIDTH - size - half) {
			xorg = half;
		    }
		}
		x = xorg;
	    }
	    y = yorg;
	}
    }
}

int 
InitCircles(XParms xp, Parms p, int reps)
{
    GenerateCircles(xp, p, False, False);
    return reps;
}

int 
InitPartCircles(XParms xp, Parms p, int reps)
{
    GenerateCircles(xp, p, True, False);
    return reps;
}


int 
InitChordPartCircles(XParms xp, Parms p, int reps)
{
    GenerateCircles(xp, p, True, False);
    XSetArcMode(xp->d, xp->bggc, ArcChord);
    XSetArcMode(xp->d, xp->fggc, ArcChord);
    return reps;
}


int 
InitSlicePartCircles(XParms xp, Parms p, int reps)
{
    GenerateCircles(xp, p, True, False);
    XSetArcMode(xp->d, xp->bggc, ArcPieSlice);
    XSetArcMode(xp->d, xp->fggc, ArcPieSlice);
    return reps;
}

static void
GenerateWideCircles(XParms xp, Parms p, Bool partialArcs, Bool ddashed)
{
    int	    size;

    GenerateCircles(xp, p, partialArcs, ddashed);

    size = p->special;
    if(ddashed) {
	XSetLineAttributes(xp->d, xp->ddbggc, (int) ((size + 9) / 10),
	    LineSolid, CapRound, JoinRound);
	XSetLineAttributes(xp->d, xp->ddfggc, (int) ((size + 9) / 10),
	    LineSolid, CapRound, JoinRound);
    }
    else {
	XSetLineAttributes(xp->d, xp->bggc, (int) ((size + 9) / 10),
	    LineSolid, CapRound, JoinRound);
	XSetLineAttributes(xp->d, xp->fggc, (int) ((size + 9) / 10),
	    LineSolid, CapRound, JoinRound);
    }
}

int 
InitWideCircles(XParms xp, Parms p, int reps)
{
    GenerateWideCircles (xp, p, False, False);
    return reps;
}
 
int 
InitPartWideCircles(XParms xp, Parms p, int reps)
{
    GenerateWideCircles (xp, p, True, False);
    return reps;
}
 
int 
InitDashedCircles(XParms xp, Parms p, int reps)
{
    char dashes[2];

    GenerateCircles(xp, p, False, False);

    /* Modify GCs to draw dashed */
    XSetLineAttributes(xp->d, xp->bggc, 0, LineOnOffDash, CapButt, JoinMiter);
    XSetLineAttributes(xp->d, xp->fggc, 0, LineOnOffDash, CapButt, JoinMiter);
    dashes[0] = 3;   dashes[1] = 2;
    XSetDashes(xp->d, xp->fggc, 0, dashes, 2);
    XSetDashes(xp->d, xp->bggc, 0, dashes, 2);
    return reps;
}

int 
InitWideDashedCircles(XParms xp, Parms p, int reps)
{
    int		size;
    XGCValues   gcv;
    char	dashes[2];

    GenerateWideCircles(xp, p, False, False);
    size = p->special;
    size = (size + 9) / 10;

    /* Modify GCs to draw dashed */
    dashes[0] = 2*size;   dashes[1] = 2*size;
    gcv.line_style = LineOnOffDash;
    XChangeGC(xp->d, xp->fggc, GCLineStyle, &gcv);
    XChangeGC(xp->d, xp->bggc, GCLineStyle, &gcv);
    XSetDashes(xp->d, xp->fggc, 0, dashes, 2);
    XSetDashes(xp->d, xp->bggc, 0, dashes, 2);
    return reps;
}

int 
InitDoubleDashedCircles(XParms xp, Parms p, int reps)
{
    char dashes[2];

    GenerateCircles(xp, p, False, True);

    /* Modify GCs to draw dashed */
    XSetLineAttributes(xp->d, xp->ddbggc, 0, LineDoubleDash, CapButt, JoinMiter);
    XSetLineAttributes(xp->d, xp->ddfggc, 0, LineDoubleDash, CapButt, JoinMiter);
    dashes[0] = 3;   dashes[1] = 2;
    XSetDashes(xp->d, xp->ddfggc, 0, dashes, 2);
    XSetDashes(xp->d, xp->ddbggc, 0, dashes, 2);
    return reps;
}

int 
InitWideDoubleDashedCircles(XParms xp, Parms p, int reps)
{
    int		size;
    XGCValues   gcv;
    char	dashes[2];

    GenerateWideCircles(xp, p, False, True);
    size = p->special;
    size = (size + 9) / 10;

    /* Modify GCs to draw dashed */
    dashes[0] = 2*size;   dashes[1] = 2*size;
    gcv.line_style = LineDoubleDash;
    XChangeGC(xp->d, xp->ddfggc, GCLineStyle, &gcv);
    XChangeGC(xp->d, xp->ddbggc, GCLineStyle, &gcv);
    XSetDashes(xp->d, xp->ddfggc, 0, dashes, 2);
    XSetDashes(xp->d, xp->ddbggc, 0, dashes, 2);
    return reps;
}

static void 
GenerateEllipses(XParms xp, Parms p, int partialArcs, Bool ddashed)
{
    int     size;
    int     half;
    int     rows;       /* Number of rows filled in current column	    */
    int     i;
    int     x, y;	    /* base of square to draw ellipse in	    */
    int     vsize, vsizeinc;
    int     dir;
    int     startAngle, arcAngle;

    if(ddashed)
	pgc = xp->ddfggc;
    else
	pgc = xp->fggc;

    size = p->special;
    half = (size + 19) / 20;
    arcs = (XArc *)malloc((p->objects) * sizeof(XArc));
    vsize = 1;
    vsizeinc = (size - 1) / (p->objects - 1);
    if (vsizeinc == 0) vsizeinc = 1;

    x = half; y = half;
    dir = 0;
    rows = 0;
    startAngle = DegreesToX(0);
    arcAngle = DegreesToX(360);

    for (i = 0; i != p->objects; i++) {    
	arcs[i].x = x;
	arcs[i].y = y;
	if ((i & 1) ^ dir) {
	    /* Make vertical axis longer */
	    arcs[i].width = vsize;
	    arcs[i].height = size;
	} else {
	    /* Make horizontal axis longer */
	    arcs[i].width = size;
	    arcs[i].height = vsize;
	}
	arcs[i].angle1 = startAngle;
	arcs[i].angle2 = arcAngle;

	if (partialArcs) {
	    startAngle += DegreesToX(30);
	    if (startAngle >= DegreesToX(360)) startAngle -= DegreesToX(360);
	    arcAngle -= DegreesToX(20);
	    if (arcAngle <= DegreesToX(0)) arcAngle += DegreesToX(360);
	}

	y += size + 1;
	rows++;
	if (y >= HEIGHT - size - half || rows == MAXROWS) {
	    /* Go to next column */
	    rows = 0;
	    y = half;
	    x += size + 1;
	    if (x >= WIDTH - size - half) {
		x = half;
	    }
	}
	
	vsize += vsizeinc;
	if (vsize > size) {
	    vsize -= size;
	    dir = 1 - dir;
	}
    }
}

int 
InitEllipses(XParms xp, Parms p, int reps)
{
    GenerateEllipses(xp, p, False, False);
    return reps;
}


int 
InitPartEllipses(XParms xp, Parms p, int reps)
{
    GenerateEllipses(xp, p, True, False);
    return reps;
}


int 
InitChordPartEllipses(XParms xp, Parms p, int reps)
{
    GenerateEllipses(xp, p, True, False);
    XSetArcMode(xp->d, xp->bggc, ArcChord);
    XSetArcMode(xp->d, xp->fggc, ArcChord);
    return reps;
}


int 
InitSlicePartEllipses(XParms xp, Parms p, int reps)
{
    GenerateEllipses(xp, p, True, False);
    XSetArcMode(xp->d, xp->bggc, ArcPieSlice);
    XSetArcMode(xp->d, xp->fggc, ArcPieSlice);
    return reps;
}


static void
GenerateWideEllipses(XParms xp, Parms p, Bool partialArcs, Bool ddashed)
{
    int size;

    GenerateEllipses (xp, p, partialArcs, ddashed);
    size = p->special;
    if(ddashed) {
	XSetLineAttributes(xp->d, xp->ddbggc, (int) ((size + 9) / 10),
	    LineSolid, CapRound, JoinRound);
	XSetLineAttributes(xp->d, xp->ddfggc, (int) ((size + 9) / 10),
	    LineSolid, CapRound, JoinRound);
    }
    else {
	XSetLineAttributes(xp->d, xp->bggc, (int) ((size + 9) / 10),
	    LineSolid, CapRound, JoinRound);
	XSetLineAttributes(xp->d, xp->fggc, (int) ((size + 9) / 10),
	    LineSolid, CapRound, JoinRound);
    }

}

int 
InitWideEllipses(XParms xp, Parms p, int reps)
{
    GenerateWideEllipses(xp, p, False, False);
    return reps;
}
 
int 
InitPartWideEllipses(XParms xp, Parms p, int reps)
{
    GenerateWideEllipses(xp, p, True, False);
    return reps;
}
 
int 
InitDashedEllipses(XParms xp, Parms p, int reps)
{
    char dashes[2];

    GenerateEllipses(xp, p, False, False);

    /* Modify GCs to draw dashed */
    XSetLineAttributes(xp->d, xp->bggc, 0, LineOnOffDash, CapButt, JoinMiter);
    XSetLineAttributes(xp->d, xp->fggc, 0, LineOnOffDash, CapButt, JoinMiter);
    dashes[0] = 3;   dashes[1] = 2;
    XSetDashes(xp->d, xp->fggc, 0, dashes, 2);
    XSetDashes(xp->d, xp->bggc, 0, dashes, 2);
    return reps;
}

int 
InitWideDashedEllipses(XParms xp, Parms p, int reps)
{
    int		size;
    XGCValues   gcv;
    char	dashes[2];

    GenerateWideEllipses(xp, p, False, False);
    size = p->special;
    size = (size + 9) / 10;

    /* Modify GCs to draw dashed */
    dashes[0] = 2*size;   dashes[1] = 2*size;
    gcv.line_style = LineOnOffDash;
    XChangeGC(xp->d, xp->fggc, GCLineStyle, &gcv);
    XChangeGC(xp->d, xp->bggc, GCLineStyle, &gcv);
    XSetDashes(xp->d, xp->fggc, 0, dashes, 2);
    XSetDashes(xp->d, xp->bggc, 0, dashes, 2);
    return reps;
}

int 
InitDoubleDashedEllipses(XParms xp, Parms p, int reps)
{
    char dashes[2];

    GenerateEllipses(xp, p, False, True);

    /* Modify GCs to draw dashed */
    XSetLineAttributes(xp->d, xp->ddbggc, 0, LineDoubleDash, CapButt, JoinMiter);
    XSetLineAttributes(xp->d, xp->ddfggc, 0, LineDoubleDash, CapButt, JoinMiter);
    dashes[0] = 3;   dashes[1] = 2;
    XSetDashes(xp->d, xp->ddfggc, 0, dashes, 2);
    XSetDashes(xp->d, xp->ddbggc, 0, dashes, 2);
    return reps;
}

int 
InitWideDoubleDashedEllipses(XParms xp, Parms p, int reps)
{
    int		size;
    XGCValues   gcv;
    char	dashes[2];

    GenerateWideEllipses(xp, p, False, True);
    size = p->special;
    size = (size + 9) / 10;

    /* Modify GCs to draw dashed */
    dashes[0] = 2*size;   dashes[1] = 2*size;
    gcv.line_style = LineDoubleDash;
    XChangeGC(xp->d, xp->ddfggc, GCLineStyle, &gcv);
    XChangeGC(xp->d, xp->ddbggc, GCLineStyle, &gcv);
    XSetDashes(xp->d, xp->ddfggc, 0, dashes, 2);
    XSetDashes(xp->d, xp->ddbggc, 0, dashes, 2);
    return reps;
}

void 
DoArcs(XParms xp, Parms p, int reps)
{
    int i;

    for (i = 0; i != reps; i++) {
        XDrawArcs(xp->d, xp->w, pgc, arcs, p->objects);
        if (pgc == xp->ddbggc)
            pgc = xp->ddfggc;
        else if(pgc == xp->ddfggc)
            pgc = xp->ddbggc;
        else if (pgc == xp->bggc)
            pgc = xp->fggc;
        else
            pgc = xp->bggc;
	CheckAbort ();
    }
}

void 
DoFilledArcs(XParms xp, Parms p, int reps)
{
    int i;

    for (i = 0; i != reps; i++) {
        XFillArcs(xp->d, xp->w, pgc, arcs, p->objects);
        if (pgc == xp->ddbggc)
            pgc = xp->ddfggc;
        else if(pgc == xp->ddfggc)
            pgc = xp->ddbggc;
        else if (pgc == xp->bggc)
            pgc = xp->fggc;
        else
            pgc = xp->bggc;
	CheckAbort ();
    }
}

void 
EndArcs(XParms xp, Parms p)
{
    free(arcs);
}