118 lines
4.2 KiB
C
118 lines
4.2 KiB
C
/*
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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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#include "mizerarc.h"
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#include <limits.h>
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typedef void (*FbArc) (FbBits * dst,
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FbStride dstStride,
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int dstBpp,
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xArc * arc, int dx, int dy, FbBits and, FbBits xor);
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void
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fbPolyArc(DrawablePtr pDrawable, GCPtr pGC, int narcs, xArc * parcs)
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{
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FbArc arc;
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if (pGC->lineWidth == 0) {
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arc = 0;
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if (pGC->lineStyle == LineSolid && pGC->fillStyle == FillSolid) {
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switch (pDrawable->bitsPerPixel) {
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case 8:
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arc = fbArc8;
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break;
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case 16:
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arc = fbArc16;
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break;
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case 24:
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arc = fbArc24;
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break;
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case 32:
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arc = fbArc32;
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break;
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}
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}
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if (arc) {
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FbGCPrivPtr pPriv = fbGetGCPrivate(pGC);
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FbBits *dst;
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FbStride dstStride;
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int dstBpp;
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int dstXoff, dstYoff;
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BoxRec box;
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int x2, y2;
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RegionPtr cclip;
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cclip = fbGetCompositeClip(pGC);
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fbGetDrawable(pDrawable, dst, dstStride, dstBpp, dstXoff, dstYoff);
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while (narcs--) {
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if (miCanZeroArc(parcs)) {
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box.x1 = parcs->x + pDrawable->x;
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box.y1 = parcs->y + pDrawable->y;
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/*
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* Because box.x2 and box.y2 get truncated to 16 bits, and the
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* RECT_IN_REGION test treats the resulting number as a signed
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* integer, the RECT_IN_REGION test alone can go the wrong way.
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* This can result in a server crash because the rendering
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* routines in this file deal directly with cpu addresses
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* of pixels to be stored, and do not clip or otherwise check
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* that all such addresses are within their respective pixmaps.
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* So we only allow the RECT_IN_REGION test to be used for
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* values that can be expressed correctly in a signed short.
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*/
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x2 = box.x1 + (int) parcs->width + 1;
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box.x2 = x2;
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y2 = box.y1 + (int) parcs->height + 1;
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box.y2 = y2;
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if ((x2 <= SHRT_MAX) && (y2 <= SHRT_MAX) &&
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(RECT_IN_REGION(cclip, &box) ==
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rgnIN))
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(*arc) (dst, dstStride, dstBpp, parcs,
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pDrawable->x + dstXoff, pDrawable->y + dstYoff,
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pPriv->and, pPriv->xor);
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else
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miZeroPolyArc(pDrawable, pGC, 1, parcs);
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}
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else
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miPolyArc(pDrawable, pGC, 1, parcs);
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parcs++;
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}
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}
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else
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miZeroPolyArc(pDrawable, pGC, narcs, parcs);
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}
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else
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miPolyArc(pDrawable, pGC, narcs, parcs);
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}
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