+++ /dev/null
-/************************************************************
-
-Copyright (c) 1989 X Consortium
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-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
-X CONSORTIUM 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 X Consortium 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 X Consortium.
-
-********************************************************/
-
-/* $XConsortium: mfbzerarc.c /main/21 1995/12/06 16:55:48 dpw $ */
-/* $XFree86: xc/programs/Xserver/mfb/mfbzerarc.c,v 3.1 1996/01/05 13:19:46 dawes 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
- */
-
-#include "X.h"
-#include "Xprotostr.h"
-#include "miscstruct.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(((unsigned long)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(pDraw, pGC, arc)
- 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 = ((mfbPrivGC *)(pGC->devPrivates[mfbGCPrivateIndex].ptr))->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);
- }
-}
projects / rdpsrv / blobdiff