InfoMagic Source Code 1993 July/THE_SOURCE_CODE_CD_ROM.iso/X/mit/server/ddx/mi/mipolyrect.c

C/C++ Source or Header | 1991-05-29 | 4.2 KB | 165 lines

/***********************************************************
Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts,
and the Massachusetts Institute of Technology, Cambridge, 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 names of Digital or MIT 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.

******************************************************************/
/* $XConsortium: mipolyrect.c,v 5.7 91/05/29 14:56:38 keith Exp $ */
#include "X.h"
#include "Xprotostr.h"
#include "miscstruct.h"
#include "gcstruct.h"
#include "pixmap.h"

void
miPolyRectangle(pDraw, pGC, nrects, pRects)
    DrawablePtr    pDraw;
    GCPtr    pGC;
    int        nrects;
    xRectangle    *pRects;
{
    int i;
    xRectangle *pR = pRects;
    DDXPointRec rect[5];
    int        bound_tmp;

#define MINBOUND(dst,eqn)    bound_tmp = eqn; \
                if (bound_tmp < -32768) \
                    bound_tmp = -32768; \
                dst = bound_tmp;

#define MAXBOUND(dst,eqn)    bound_tmp = eqn; \
                if (bound_tmp > 32767) \
                    bound_tmp = 32767; \
                dst = bound_tmp;

#define MAXUBOUND(dst,eqn)    bound_tmp = eqn; \
                if (bound_tmp > 65535) \
                    bound_tmp = 65535; \
                dst = bound_tmp;

    if (pGC->lineStyle == LineSolid && pGC->joinStyle == JoinMiter &&
    pGC->lineWidth != 0)
    {
    xRectangle  *tmp, *t;
    int        ntmp;
    int        offset1, offset2, offset3;
    int        x, y, width, height;

    ntmp = (nrects << 2);
    offset2 = pGC->lineWidth;
    offset1 = offset2 >> 1;
    offset3 = offset2 - offset1;
    tmp = (xRectangle *) ALLOCATE_LOCAL(ntmp * sizeof (xRectangle));
    if (!tmp)
        return;
    t = tmp;
    for (i = 0; i < nrects; i++)
    {
        x = pR->x;
        y = pR->y;
        width = pR->width;
        height = pR->height;
        pR++;
        if (width == 0 && height == 0)
        {
        rect[0].x = x;
        rect[0].y = y;
        rect[1].x = x;
        rect[1].y = y;
        (*pGC->ops->Polylines)(pDraw, pGC, CoordModeOrigin, 2, rect);
        }
        else if (height < offset2 || width < offset1)
        {
        if (height == 0)
        {
            t->x = x;
            t->width = width;
        }
        else
        {
            MINBOUND (t->x, x - offset1)
            MAXUBOUND (t->width, width + offset2)
        }
        if (width == 0)
        {
            t->y = y;
            t->height = height;
        }
        else
        {
            MINBOUND (t->y, y - offset1)
            MAXUBOUND (t->height, height + offset2)
        }
        t++;
        }
        else
        {
        MINBOUND(t->x, x - offset1)
        MINBOUND(t->y, y - offset1)
        MAXUBOUND(t->width, width + offset2)
            t->height = offset2;
            t++;
            MINBOUND(t->x, x - offset1)
            MAXBOUND(t->y, y + offset3);
            t->width = offset2;
            t->height = height - offset2;
            t++;
            MAXBOUND(t->x, x + width - offset1);
            MAXBOUND(t->y, y + offset3)
            t->width = offset2;
            t->height = height - offset2;
            t++;
            MINBOUND(t->x, x - offset1)
            MAXBOUND(t->y, y + height - offset1)
            MAXUBOUND(t->width, width + offset2)
            t->height = offset2;
            t++;
        }
    }
    (*pGC->ops->PolyFillRect) (pDraw, pGC, t - tmp, tmp);
    DEALLOCATE_LOCAL ((pointer) tmp);
    }
    else
    {

        for (i=0; i<nrects; i++)
        {
        rect[0].x = pR->x;
        rect[0].y = pR->y;

        MAXBOUND(rect[1].x, pR->x + (int) pR->width)
        rect[1].y = rect[0].y;

        rect[2].x = rect[1].x;
        MAXBOUND(rect[2].y, pR->y + (int) pR->height);

        rect[3].x = rect[0].x;
        rect[3].y = rect[2].y;

        rect[4].x = rect[0].x;
        rect[4].y = rect[0].y;

            (*pGC->ops->Polylines)(pDraw, pGC, CoordModeOrigin, 5, rect);
        pR++;
        }
    }
}