270 lines
7.2 KiB
C
270 lines
7.2 KiB
C
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/************************************************************
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Copyright (c) 1989 X Consortium
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of the X Consortium shall not be
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used in advertising or otherwise to promote the sale, use or other dealings
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in this Software without prior written authorization from the X Consortium.
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********************************************************/
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/* GJA -- Took mfb code and modified it. */
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/* $XConsortium: mfbzerarc.c /main/4 1996/02/21 17:56:52 kaleb $ */
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/* Derived from:
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* "Algorithm for drawing ellipses or hyperbolae with a digital plotter"
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* by M. L. V. Pitteway
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* The Computer Journal, November 1967, Volume 10, Number 3, pp. 282-289
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*/
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#ifdef HAVE_XORG_CONFIG_H
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#include <xorg-config.h>
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#endif
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#include "xf4bpp.h"
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#include "OScompiler.h"
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#include "mfbmap.h"
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#include "mfb.h"
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#include "maskbits.h"
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#include "mi.h"
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#include "mizerarc.h"
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#include "wm3.h"
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#include "xf86str.h" /* for pScrn->vtSema */
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extern ScrnInfoPtr *xf86Screens;
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/*
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* Note, LEFTMOST must be the bit leftmost in the actual screen
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* representation. This depends on both BITMAP_BIT_ORDER and
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* IMAGE_BYTE_ORDER
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* DHD 10/92
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*/
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#if (BITMAP_BIT_ORDER == MSBFirst)
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#if (IMAGE_BYTE_ORDER == MSBFirst)
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#define LEFTMOST ((unsigned int) 0x80000000)
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#else
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#define LEFTMOST ((unsigned int) 0x80)
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#endif
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#else
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#if (IMAGE_BYTE_ORDER == LSBFirst)
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#define LEFTMOST ((unsigned int) 1)
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#else
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#define LEFTMOST ((unsigned int) 0x1000000)
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#endif
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#endif
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#define PixelateWhite(addr,off) \
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{ \
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register int *tmpaddr = &((addr)[(off)>>PWSH]); \
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UPDRW(tmpaddr,SCRRIGHT (LEFTMOST, ((off) & PIM))); \
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}
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#define PixelateBlack(addr,off) \
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{ \
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register int *tmpaddr = &((addr)[(off)>>PWSH]); \
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UPDRW(tmpaddr,~(SCRRIGHT (LEFTMOST, ((off) & PIM)))); \
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}
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#define Pixelate(base,off) \
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{ \
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paddr = base + ((off)>>PWSH); \
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pmask = SCRRIGHT(LEFTMOST, (off) & PIM); \
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UPDRW(paddr,(pixel & pmask)); \
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}
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#define DoPix(bit,base,off) if (msk & bit) Pixelate(base,off);
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static void
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v16ZeroArcSS
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(
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DrawablePtr pDraw,
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GCPtr pGC,
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xArc *arc
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)
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{
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miZeroArcRec info;
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Bool do360;
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register int x, y, a, b, d, msk;
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register int k1, k3, dx, dy;
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int *addrl;
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int *yorgl, *yorgol;
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unsigned long pixel;
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int nlwidth, yoffset, dyoffset;
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int pmask;
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register int *paddr;
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if (((mfbPrivGC *)(pGC->devPrivates[mfbGetGCPrivateIndex()].ptr))->rop ==
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RROP_BLACK)
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pixel = 0;
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else
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pixel = ~0UL;
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if (pDraw->type == DRAWABLE_WINDOW)
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{
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addrl = (int *)
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(((PixmapPtr)(pDraw->pScreen->devPrivate))->devPrivate.ptr);
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nlwidth = (int)
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(((PixmapPtr)(pDraw->pScreen->devPrivate))->devKind) >> 2;
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}
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else
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{
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addrl = (int *)(((PixmapPtr)pDraw)->devPrivate.ptr);
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nlwidth = (int)(((PixmapPtr)pDraw)->devKind) >> 2;
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}
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do360 = miZeroArcSetup(arc, &info, TRUE);
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yorgl = addrl + ((info.yorg + pDraw->y) * nlwidth);
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yorgol = addrl + ((info.yorgo + pDraw->y) * nlwidth);
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info.xorg += pDraw->x;
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info.xorgo += pDraw->x;
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MIARCSETUP();
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yoffset = y ? nlwidth : 0;
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dyoffset = 0;
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msk = info.initialMask;
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if (!(arc->width & 1))
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{
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DoPix(2, yorgl, info.xorgo);
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DoPix(8, yorgol, info.xorgo);
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}
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if (!info.end.x || !info.end.y)
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{
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msk = info.end.mask;
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info.end = info.altend;
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}
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if (do360 && (arc->width == arc->height) && !(arc->width & 1))
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{
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int xoffset = nlwidth;
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int *yorghl = yorgl + (info.h * nlwidth);
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int xorghp = info.xorg + info.h;
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int xorghn = info.xorg - info.h;
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while (1)
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{
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PixelateWhite(yorgl + yoffset, info.xorg + x);
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PixelateWhite(yorgl + yoffset, info.xorg - x);
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PixelateWhite(yorgol- yoffset, info.xorg - x);
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PixelateWhite(yorgol - yoffset, info.xorg + x);
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if (a < 0)
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break;
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PixelateWhite(yorghl - xoffset, xorghp - y);
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PixelateWhite(yorghl - xoffset, xorghn + y);
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PixelateWhite(yorghl + xoffset, xorghn + y);
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PixelateWhite(yorghl + xoffset, xorghp - y);
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xoffset += nlwidth;
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MIARCCIRCLESTEP(yoffset += nlwidth;);
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}
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x = info.w;
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yoffset = info.h * nlwidth;
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}
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else if (do360)
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{
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while (y < info.h || x < info.w)
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{
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MIARCOCTANTSHIFT(dyoffset = nlwidth;);
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Pixelate(yorgl + yoffset, info.xorg + x);
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Pixelate(yorgl + yoffset, info.xorgo - x);
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Pixelate(yorgol - yoffset, info.xorgo - x);
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Pixelate(yorgol - yoffset, info.xorg + x);
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MIARCSTEP(yoffset += dyoffset;, yoffset += nlwidth;);
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}
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}
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else
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{
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while (y < info.h || x < info.w)
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{
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MIARCOCTANTSHIFT(dyoffset = nlwidth;);
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if ((x == info.start.x) || (y == info.start.y))
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{
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msk = info.start.mask;
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info.start = info.altstart;
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}
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DoPix(1, yorgl + yoffset, info.xorg + x);
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DoPix(2, yorgl + yoffset, info.xorgo - x);
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DoPix(4, yorgol - yoffset, info.xorgo - x);
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DoPix(8, yorgol - yoffset, info.xorg + x);
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if ((x == info.end.x) || (y == info.end.y))
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{
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msk = info.end.mask;
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info.end = info.altend;
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}
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MIARCSTEP(yoffset += dyoffset;, yoffset += nlwidth;);
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}
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}
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if ((x == info.start.x) || (y == info.start.y))
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msk = info.start.mask;
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DoPix(1, yorgl + yoffset, info.xorg + x);
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DoPix(4, yorgol - yoffset, info.xorgo - x);
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if (arc->height & 1)
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{
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DoPix(2, yorgl + yoffset, info.xorgo - x);
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DoPix(8, yorgol - yoffset, info.xorg + x);
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}
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}
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static void
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xf4bppZeroPolyArcSS
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(
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DrawablePtr pDraw,
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GCPtr pGC,
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int narcs,
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xArc *parcs
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)
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{
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register xArc *arc;
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register int i;
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BoxRec box;
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RegionPtr cclip;
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if (!pGC->planemask & 0x0F)
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return;
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cclip = pGC->pCompositeClip;
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for (arc = parcs, i = narcs; --i >= 0; arc++)
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{
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if (miCanZeroArc(arc))
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{
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box.x1 = arc->x + pDraw->x;
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box.y1 = arc->y + pDraw->y;
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box.x2 = box.x1 + (int)arc->width + 1;
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box.y2 = box.y1 + (int)arc->height + 1;
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if (RECT_IN_REGION(pDraw->pScreen, cclip, &box) == rgnIN)
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v16ZeroArcSS(pDraw, pGC, arc);
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else
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miZeroPolyArc(pDraw, pGC, 1, arc);
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}
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else
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miPolyArc(pDraw, pGC, 1, arc);
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}
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}
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void
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xf4bppZeroPolyArc(pDraw, pGC, narcs, parcs)
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DrawablePtr pDraw;
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GCPtr pGC;
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int narcs;
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xArc *parcs;
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{
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if ( !xf86Screens[pDraw->pScreen->myNum]->vtSema ) {
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miZeroPolyArc(pDraw, pGC, narcs, parcs);
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} else {
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DO_WM3(pGC,xf4bppZeroPolyArcSS(pDraw, pGC, narcs, parcs));
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}
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}
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