diff options
Diffstat (limited to 'fb/fbarc.c')
| -rw-r--r-- | fb/fbarc.c | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/fb/fbarc.c b/fb/fbarc.c new file mode 100644 index 000000000..9713ffb09 --- /dev/null +++ b/fb/fbarc.c @@ -0,0 +1,118 @@ +/* + * Id: fbarc.c,v 1.1 1999/11/02 03:54:45 keithp Exp $ + * + * 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. + */ +/* $XFree86: xc/programs/Xserver/fb/fbarc.c,v 1.8 2002/11/09 04:59:29 tsi Exp $ */ + +#include "fb.h" +#include "mizerarc.h" +#ifdef IN_MODULE +#include "xf86_ansic.h" +#endif + +typedef void (*FbArc) (FbBits *dst, + FbStride dstStride, + int dstBpp, + xArc *arc, + int dx, + int dy, + FbBits and, + FbBits xor); + +void +fbPolyArc (DrawablePtr pDrawable, + GCPtr pGC, + int narcs, + xArc *parcs) +{ + FbArc arc; + + if (pGC->lineWidth == 0) + { +#ifndef FBNOPIXADDR + arc = 0; + if (pGC->lineStyle == LineSolid && pGC->fillStyle == FillSolid) + { + switch (pDrawable->bitsPerPixel) + { + case 8: arc = fbArc8; break; + case 16: arc = fbArc16; break; +#ifdef FB_24BIT + case 24: arc = fbArc24; break; +#endif + case 32: arc = fbArc32; break; + } + } + if (arc) + { + FbGCPrivPtr pPriv = fbGetGCPrivate (pGC); + FbBits *dst; + FbStride dstStride; + int dstBpp; + int dstXoff, dstYoff; + BoxRec box; + int x2, y2; + RegionPtr cclip; + + cclip = fbGetCompositeClip (pGC); + fbGetDrawable (pDrawable, dst, dstStride, dstBpp, dstXoff, dstYoff); + while (narcs--) + { + if (miCanZeroArc (parcs)) + { + box.x1 = parcs->x + pDrawable->x; + box.y1 = parcs->y + pDrawable->y; + /* + * Because box.x2 and box.y2 get truncated to 16 bits, and the + * RECT_IN_REGION test treats the resulting number as a signed + * integer, the RECT_IN_REGION test alone can go the wrong way. + * This can result in a server crash because the rendering + * routines in this file deal directly with cpu addresses + * of pixels to be stored, and do not clip or otherwise check + * that all such addresses are within their respective pixmaps. + * So we only allow the RECT_IN_REGION test to be used for + * values that can be expressed correctly in a signed short. + */ + x2 = box.x1 + (int)parcs->width + 1; + box.x2 = x2; + y2 = box.y1 + (int)parcs->height + 1; + box.y2 = y2; + if ( (x2 <= MAXSHORT) && (y2 <= MAXSHORT) && + (RECT_IN_REGION(pDrawable->pScreen, cclip, &box) == rgnIN) ) + (*arc) (dst, dstStride, dstBpp, + parcs, pDrawable->x + dstXoff, pDrawable->y + dstYoff, + pPriv->and, pPriv->xor); + else + miZeroPolyArc(pDrawable, pGC, 1, parcs); + } + else + miPolyArc(pDrawable, pGC, 1, parcs); + parcs++; + } + } + else +#endif + miZeroPolyArc (pDrawable, pGC, narcs, parcs); + } + else + miPolyArc (pDrawable, pGC, narcs, parcs); +} |