xenocara/xserver/fb/fbsetsp.c

/*
 * Copyright © 1998 Keith Packard
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, 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 Keith Packard not be used in
 * advertising or publicity pertaining to distribution of the software without
 * specific, written prior permission.  Keith Packard makes no
 * representations about the suitability of this software for any purpose.  It
 * is provided "as is" without express or implied warranty.
 *
 * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL KEITH PACKARD 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.
 */

#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif

#include "fb.h"

void
fbSetSpans(DrawablePtr pDrawable,
           GCPtr pGC,
           char *src, DDXPointPtr ppt, int *pwidth, int nspans, int fSorted)
{
    FbGCPrivPtr pPriv = fbGetGCPrivate(pGC);
    RegionPtr pClip = fbGetCompositeClip(pGC);
    FbBits *dst, *d, *s;
    FbStride dstStride;
    int dstBpp;
    int dstXoff, dstYoff;
    BoxPtr pbox;
    int n;
    int xoff;
    int x1, x2;

    fbGetDrawable(pDrawable, dst, dstStride, dstBpp, dstXoff, dstYoff);
    while (nspans--) {
        d = dst + (ppt->y + dstYoff) * dstStride;
        xoff = (int) (((long) src) & (FB_MASK >> 3));
        s = (FbBits *) (src - xoff);
        xoff <<= 3;
        n = RegionNumRects(pClip);
        pbox = RegionRects(pClip);
        while (n--) {
            if (pbox->y1 > ppt->y)
                break;
            if (pbox->y2 > ppt->y) {
                x1 = ppt->x;
                x2 = x1 + *pwidth;
                if (pbox->x1 > x1)
                    x1 = pbox->x1;
                if (pbox->x2 < x2)
                    x2 = pbox->x2;
                if (x1 < x2)
                    fbBlt((FbBits *) s,
                          0,
                          (x1 - ppt->x) * dstBpp + xoff,
                          d,
                          dstStride,
                          (x1 + dstXoff) * dstBpp,
                          (x2 - x1) * dstBpp,
                          1, pGC->alu, pPriv->pm, dstBpp, FALSE, FALSE);
            }
        }
        src += PixmapBytePad(*pwidth, pDrawable->depth);
        ppt++;
        pwidth++;
    }
    fbValidateDrawable(pDrawable);
    fbFinishAccess(pDrawable);
}