94 lines
2.8 KiB
C
94 lines
2.8 KiB
C
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/*
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*
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* Copyright © 1998 Keith Packard
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of Keith Packard not be used in
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* advertising or publicity pertaining to distribution of the software without
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* specific, written prior permission. Keith Packard makes no
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* representations about the suitability of this software for any purpose. It
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* is provided "as is" without express or implied warranty.
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*
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* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifdef HAVE_DIX_CONFIG_H
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#include <dix-config.h>
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#endif
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#include "fb.h"
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void
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fbFillSpans(DrawablePtr pDrawable,
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GCPtr pGC, int n, DDXPointPtr ppt, int *pwidth, int fSorted)
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{
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RegionPtr pClip = fbGetCompositeClip(pGC);
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BoxPtr pextent, pbox;
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int nbox;
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int extentX1, extentX2, extentY1, extentY2;
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int fullX1, fullX2, fullY1;
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int partX1, partX2;
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pextent = REGION_EXTENTS(pClip);
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extentX1 = pextent->x1;
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extentY1 = pextent->y1;
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extentX2 = pextent->x2;
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extentY2 = pextent->y2;
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while (n--) {
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fullX1 = ppt->x;
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fullY1 = ppt->y;
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fullX2 = fullX1 + (int) *pwidth;
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ppt++;
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pwidth++;
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if (fullY1 < extentY1 || extentY2 <= fullY1)
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continue;
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if (fullX1 < extentX1)
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fullX1 = extentX1;
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if (fullX2 > extentX2)
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fullX2 = extentX2;
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if (fullX1 >= fullX2)
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continue;
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nbox = REGION_NUM_RECTS(pClip);
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if (nbox == 1) {
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fbFill(pDrawable, pGC, fullX1, fullY1, fullX2 - fullX1, 1);
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}
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else {
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pbox = REGION_RECTS(pClip);
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while (nbox--) {
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if (pbox->y1 <= fullY1 && fullY1 < pbox->y2) {
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partX1 = pbox->x1;
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if (partX1 < fullX1)
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partX1 = fullX1;
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partX2 = pbox->x2;
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if (partX2 > fullX2)
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partX2 = fullX2;
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if (partX2 > partX1) {
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fbFill(pDrawable, pGC,
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partX1, fullY1, partX2 - partX1, 1);
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}
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}
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pbox++;
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}
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}
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}
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}
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