From f4092abdf94af6a99aff944d6264bc1284e8bdd4 Mon Sep 17 00:00:00 2001 From: Reinhard Tartler Date: Mon, 10 Oct 2011 17:43:39 +0200 Subject: Imported nx-X11-3.1.0-1.tar.gz Summary: Imported nx-X11-3.1.0-1.tar.gz Keywords: Imported nx-X11-3.1.0-1.tar.gz into Git repository --- nx-X11/programs/Xserver/mfb/mfbzerarc.c | 258 ++++++++++++++++++++++++++++++++ 1 file changed, 258 insertions(+) create mode 100644 nx-X11/programs/Xserver/mfb/mfbzerarc.c (limited to 'nx-X11/programs/Xserver/mfb/mfbzerarc.c') diff --git a/nx-X11/programs/Xserver/mfb/mfbzerarc.c b/nx-X11/programs/Xserver/mfb/mfbzerarc.c new file mode 100644 index 000000000..92fd81dfb --- /dev/null +++ b/nx-X11/programs/Xserver/mfb/mfbzerarc.c @@ -0,0 +1,258 @@ +/* $XFree86: xc/programs/Xserver/mfb/mfbzerarc.c,v 3.7 2002/09/27 01:57:47 dawes Exp $ */ +/************************************************************ + +Copyright 1989, 1998 The Open Group + +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. + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN +AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +Except as contained in this notice, the name of The Open Group shall not be +used in advertising or otherwise to promote the sale, use or other dealings +in this Software without prior written authorization from The Open Group. + +********************************************************/ + +/* $Xorg: mfbzerarc.c,v 1.4 2001/02/09 02:05:19 xorgcvs Exp $ */ + +/* Derived from: + * "Algorithm for drawing ellipses or hyperbolae with a digital plotter" + * by M. L. V. Pitteway + * The Computer Journal, November 1967, Volume 10, Number 3, pp. 282-289 + */ + +#ifdef HAVE_DIX_CONFIG_H +#include +#endif + +#include +#include +#include "regionstr.h" +#include "gcstruct.h" +#include "pixmapstr.h" +#include "scrnintstr.h" +#include "mfb.h" +#include "maskbits.h" +#include "mizerarc.h" +#include "mi.h" + +/* + * Note: LEFTMOST must be the bit leftmost in the actual screen + * representation. This depends also on the IMAGE_BYTE_ORDER. + * LONG2CHARS() takes care of the re-ordering as required. (DHD) + */ +#if (BITMAP_BIT_ORDER == MSBFirst) +#define LEFTMOST ((PixelType) LONG2CHARS(((MfbBits)1 << PLST))) +#else +#define LEFTMOST ((PixelType) LONG2CHARS(1)) +#endif + +#define PixelateWhite(addr,yoff,xoff) \ + *mfbScanlineOffset(addr, (yoff)+((xoff)>>PWSH)) |= \ + SCRRIGHT (LEFTMOST, ((xoff) & PIM)) +#define PixelateBlack(addr,yoff,xoff) \ + *mfbScanlineOffset(addr, (yoff)+((xoff)>>PWSH)) &= \ + ~(SCRRIGHT (LEFTMOST, ((xoff) & PIM))) + +#define Pixelate(base,yoff,xoff) \ +{ \ + paddr = mfbScanlineOffset(base, (yoff) + ((xoff)>>PWSH)); \ + pmask = SCRRIGHT(LEFTMOST, (xoff) & PIM); \ + *paddr = (*paddr & ~pmask) | (pixel & pmask); \ +} + +#define DoPix(bit,base,yoff,xoff) if (mask & bit) Pixelate(base,yoff,xoff); + +static void +mfbZeroArcSS( + DrawablePtr pDraw, + GCPtr pGC, + xArc *arc) +{ + miZeroArcRec info; + Bool do360; + register int x, y, a, b, d, mask; + register int k1, k3, dx, dy; + PixelType *addrl; + PixelType *yorgl, *yorgol; + PixelType pixel; + int nlwidth, yoffset, dyoffset; + PixelType pmask; + register PixelType *paddr; + + if (((mfbPrivGC *)(pGC->devPrivates[mfbGCPrivateIndex].ptr))->rop == + RROP_BLACK) + pixel = 0; + else + pixel = ~0; + + mfbGetPixelWidthAndPointer(pDraw, nlwidth, addrl); + do360 = miZeroArcSetup(arc, &info, TRUE); + yorgl = addrl + ((info.yorg + pDraw->y) * nlwidth); + yorgol = addrl + ((info.yorgo + pDraw->y) * nlwidth); + info.xorg += pDraw->x; + info.xorgo += pDraw->x; + MIARCSETUP(); + yoffset = y ? nlwidth : 0; + dyoffset = 0; + mask = info.initialMask; + if (!(arc->width & 1)) + { + DoPix(2, yorgl, 0, info.xorgo); + DoPix(8, yorgol, 0, info.xorgo); + } + if (!info.end.x || !info.end.y) + { + mask = info.end.mask; + info.end = info.altend; + } + if (do360 && (arc->width == arc->height) && !(arc->width & 1)) + { + int xoffset = nlwidth; + PixelType *yorghl = mfbScanlineDeltaNoBankSwitch(yorgl, info.h, nlwidth); + int xorghp = info.xorg + info.h; + int xorghn = info.xorg - info.h; + + if (pixel) + { + while (1) + { + PixelateWhite(yorgl, yoffset, info.xorg + x); + PixelateWhite(yorgl, yoffset, info.xorg - x); + PixelateWhite(yorgol, -yoffset, info.xorg - x); + PixelateWhite(yorgol, -yoffset, info.xorg + x); + if (a < 0) + break; + PixelateWhite(yorghl, -xoffset, xorghp - y); + PixelateWhite(yorghl, -xoffset, xorghn + y); + PixelateWhite(yorghl, xoffset, xorghn + y); + PixelateWhite(yorghl, xoffset, xorghp - y); + xoffset += nlwidth; + MIARCCIRCLESTEP(yoffset += nlwidth;); + } + } + else + { + while (1) + { + PixelateBlack(yorgl, yoffset, info.xorg + x); + PixelateBlack(yorgl, yoffset, info.xorg - x); + PixelateBlack(yorgol, -yoffset, info.xorg - x); + PixelateBlack(yorgol, -yoffset, info.xorg + x); + if (a < 0) + break; + PixelateBlack(yorghl, -xoffset, xorghp - y); + PixelateBlack(yorghl, -xoffset, xorghn + y); + PixelateBlack(yorghl, xoffset, xorghn + y); + PixelateBlack(yorghl, xoffset, xorghp - y); + xoffset += nlwidth; + MIARCCIRCLESTEP(yoffset += nlwidth;); + } + } + x = info.w; + yoffset = info.h * nlwidth; + } + else if (do360) + { + while (y < info.h || x < info.w) + { + MIARCOCTANTSHIFT(dyoffset = nlwidth;); + Pixelate(yorgl, yoffset, info.xorg + x); + Pixelate(yorgl, yoffset, info.xorgo - x); + Pixelate(yorgol, -yoffset, info.xorgo - x); + Pixelate(yorgol, -yoffset, info.xorg + x); + MIARCSTEP(yoffset += dyoffset;, yoffset += nlwidth;); + } + } + else + { + while (y < info.h || x < info.w) + { + MIARCOCTANTSHIFT(dyoffset = nlwidth;); + if ((x == info.start.x) || (y == info.start.y)) + { + mask = info.start.mask; + info.start = info.altstart; + } + DoPix(1, yorgl, yoffset, info.xorg + x); + DoPix(2, yorgl, yoffset, info.xorgo - x); + DoPix(4, yorgol, -yoffset, info.xorgo - x); + DoPix(8, yorgol, -yoffset, info.xorg + x); + if ((x == info.end.x) || (y == info.end.y)) + { + mask = info.end.mask; + info.end = info.altend; + } + MIARCSTEP(yoffset += dyoffset;, yoffset += nlwidth;); + } + } + if ((x == info.start.x) || (y == info.start.y)) + mask = info.start.mask; + DoPix(1, yorgl, yoffset, info.xorg + x); + DoPix(4, yorgol, -yoffset, info.xorgo - x); + if (arc->height & 1) + { + DoPix(2, yorgl, yoffset, info.xorgo - x); + DoPix(8, yorgol, -yoffset, info.xorg + x); + } +} + +void +mfbZeroPolyArcSS(pDraw, pGC, narcs, parcs) + DrawablePtr pDraw; + GCPtr pGC; + int narcs; + xArc *parcs; +{ + register xArc *arc; + register int i; + BoxRec box; + int x2, y2; + RegionPtr cclip; + + if (!(pGC->planemask & 1)) + return; + cclip = pGC->pCompositeClip; + for (arc = parcs, i = narcs; --i >= 0; arc++) + { + if (miCanZeroArc(arc)) + { + box.x1 = arc->x + pDraw->x; + box.y1 = arc->y + pDraw->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)arc->width + 1; + box.x2 = x2; + y2 = box.y1 + (int)arc->height + 1; + box.y2 = y2; + if ( (x2 <= MAXSHORT) && (y2 <= MAXSHORT) && + (RECT_IN_REGION(pDraw->pScreen, cclip, &box) == rgnIN) ) + mfbZeroArcSS(pDraw, pGC, arc); + else + miZeroPolyArc(pDraw, pGC, 1, arc); + } + else + miPolyArc(pDraw, pGC, 1, arc); + } +} -- cgit v1.2.3