374 lines
9.5 KiB
C
374 lines
9.5 KiB
C
/* $XFree86: xc/programs/Xserver/ilbm/ilbmfillarc.c,v 3.1 1998/03/20 21:08:01 hohndel Exp $ */
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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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/* $XConsortium: ilbmfillarc.c,v 5.14 94/04/17 20:28:20 dpw Exp $ */
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/* Modified jun 95 by Geert Uytterhoeven (Geert.Uytterhoeven@cs.kuleuven.ac.be)
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to use interleaved bitplanes instead of normal bitplanes */
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#include "X.h"
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#include "Xprotostr.h"
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#include "miscstruct.h"
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#include "gcstruct.h"
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#include "pixmapstr.h"
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#include "scrnintstr.h"
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#include "ilbm.h"
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#include "maskbits.h"
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#include "mifillarc.h"
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#include "mi.h"
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static void
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ilbmFillEllipseSolid(pDraw, arc, rrops)
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DrawablePtr pDraw;
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xArc *arc;
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register unsigned char *rrops;
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{
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int x, y, e;
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int yk, xk, ym, xm, dx, dy, xorg, yorg;
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register int slw;
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miFillArcRec info;
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PixelType *addrlt, *addrlb;
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register PixelType *pdst;
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PixelType *addrl;
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register int n;
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register int d;
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int nlwidth;
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register int xpos;
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PixelType startmask, endmask;
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int nlmiddle;
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int depthDst;
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int auxDst;
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ilbmGetPixelWidthAuxDepthAndPointer(pDraw, nlwidth, auxDst, depthDst,
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addrlt);
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miFillArcSetup(arc, &info);
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MIFILLARCSETUP();
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xorg += pDraw->x;
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yorg += pDraw->y;
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addrlb = addrlt;
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addrlt += auxDst * (yorg - y);
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addrlb += auxDst * (yorg + y + dy);
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while (y) {
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addrlt += auxDst;
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addrlb -= auxDst;
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MIFILLARCSTEP(slw);
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if (!slw)
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continue;
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xpos = xorg - x;
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pdst = addrl = ilbmScanlineOffset(addrlt, (xpos >> PWSH));
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if (((xpos & PIM) + slw) < PPW) {
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maskpartialbits(xpos, slw, startmask);
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for (d = 0; d < depthDst; d++, pdst += nlwidth) { /* @@@ NEXT PLANE @@@ */
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switch (rrops[d]) {
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case RROP_BLACK:
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*pdst &= ~startmask;
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break;
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case RROP_WHITE:
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*pdst |= startmask;
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break;
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case RROP_INVERT:
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*pdst ^= startmask;
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break;
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case RROP_NOP:
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break;
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}
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}
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if (miFillArcLower(slw)) {
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pdst = ilbmScanlineOffset(addrlb, (xpos >> PWSH));
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for (d = 0; d < depthDst; d++, pdst += nlwidth) { /* @@@ NEXT PLANE @@@ */
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switch (rrops[d]) {
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case RROP_BLACK:
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*pdst &= ~startmask;
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break;
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case RROP_WHITE:
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*pdst |= startmask;
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break;
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case RROP_INVERT:
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*pdst ^= startmask;
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break;
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case RROP_NOP:
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break;
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}
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}
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}
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continue;
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}
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maskbits(xpos, slw, startmask, endmask, nlmiddle);
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for (d = 0; d < depthDst; d++, addrl += nlwidth) { /* @@@ NEXT PLANE @@@ */
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n = nlmiddle;
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pdst = addrl;
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switch (rrops[d]) {
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case RROP_BLACK:
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if (startmask)
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*pdst++ &= ~startmask;
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while (n--)
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*pdst++ = 0;
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if (endmask)
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*pdst &= ~endmask;
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break;
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case RROP_WHITE:
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if (startmask)
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*pdst++ |= startmask;
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while (n--)
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*pdst++ = ~0;
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if (endmask)
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*pdst |= endmask;
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break;
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case RROP_INVERT:
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if (startmask)
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*pdst++ ^= startmask;
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while (n--)
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*pdst++ ^= ~0;
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if (endmask)
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*pdst ^= endmask;
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break;
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case RROP_NOP:
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break;
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}
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}
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if (!miFillArcLower(slw))
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continue;
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addrl = ilbmScanlineOffset(addrlb, (xpos >> PWSH));
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for (d = 0; d < depthDst; d++, addrl += nlwidth) { /* @@@ NEXT PLANE @@@ */
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n = nlmiddle;
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pdst = addrl;
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switch (rrops[d]) {
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case RROP_BLACK:
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if (startmask)
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*pdst++ &= ~startmask;
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while (n--)
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*pdst++ = 0;
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if (endmask)
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*pdst &= ~endmask;
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break;
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case RROP_WHITE:
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if (startmask)
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*pdst++ |= startmask;
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while (n--)
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*pdst++ = ~0;
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if (endmask)
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*pdst |= endmask;
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break;
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case RROP_INVERT:
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if (startmask)
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*pdst++ ^= startmask;
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while (n--)
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*pdst++ ^= ~0;
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if (endmask)
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*pdst ^= endmask;
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break;
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case RROP_NOP:
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break;
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}
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}
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}
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}
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#define FILLSPAN(xl,xr,addr) \
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if (xr >= xl) { \
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width = xr - xl + 1; \
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addrl = ilbmScanlineOffset(addr, (xl >> PWSH)); \
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if (((xl & PIM) + width) < PPW) { \
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maskpartialbits(xl, width, startmask); \
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for (pdst = addrl, d = 0; d < depthDst; d++, pdst += nlwidth) { /* @@@ NEXT PLANE @@@ */ \
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switch (rrops[d]) { \
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case RROP_BLACK: \
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*pdst &= ~startmask; \
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break; \
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case RROP_WHITE: \
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*pdst |= startmask; \
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break; \
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case RROP_INVERT: \
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*pdst ^= startmask; \
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break; \
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case RROP_NOP: \
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break; \
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} \
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} \
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} else { \
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maskbits(xl, width, startmask, endmask, nlmiddle); \
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for (d = 0; d < depthDst; d++, addrl += nlwidth) { /* @@@ NEXT PLANE @@@ */ \
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n = nlmiddle; \
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pdst = addrl; \
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switch (rrops[d]) { \
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case RROP_BLACK: \
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if (startmask) \
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*pdst++ &= ~startmask; \
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while (n--) \
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*pdst++ = 0; \
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if (endmask) \
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*pdst &= ~endmask; \
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break; \
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case RROP_WHITE: \
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if (startmask) \
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*pdst++ |= startmask; \
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while (n--) \
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*pdst++ = ~0; \
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if (endmask) \
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*pdst |= endmask; \
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break; \
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case RROP_INVERT: \
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if (startmask) \
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*pdst++ ^= startmask; \
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while (n--) \
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*pdst++ ^= ~0; \
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if (endmask) \
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*pdst ^= endmask; \
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break; \
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case RROP_NOP: \
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break; \
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} \
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} \
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} \
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}
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#define FILLSLICESPANS(flip,addr) \
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if (!flip) { \
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FILLSPAN(xl, xr, addr); \
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} else { \
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xc = xorg - x; \
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FILLSPAN(xc, xr, addr); \
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xc += slw - 1; \
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FILLSPAN(xl, xc, addr); \
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}
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static void
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ilbmFillArcSliceSolidCopy(pDraw, pGC, arc, rrops)
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DrawablePtr pDraw;
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GCPtr pGC;
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xArc *arc;
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register unsigned char *rrops;
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{
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PixelType *addrl;
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register PixelType *pdst;
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register int n;
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register int d;
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int yk, xk, ym, xm, dx, dy, xorg, yorg, slw;
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register int x, y, e;
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miFillArcRec info;
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miArcSliceRec slice;
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int xl, xr, xc;
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PixelType *addrlt, *addrlb;
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int nlwidth;
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int width;
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PixelType startmask, endmask;
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int nlmiddle;
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int auxDst;
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int depthDst;
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ilbmGetPixelWidthAuxDepthAndPointer(pDraw, nlwidth, auxDst, depthDst,
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addrlt);
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miFillArcSetup(arc, &info);
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miFillArcSliceSetup(arc, &slice, pGC);
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MIFILLARCSETUP();
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xorg += pDraw->x;
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yorg += pDraw->y;
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addrlb = addrlt;
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addrlt = ilbmScanlineDeltaNoBankSwitch(addrlt, yorg - y, auxDst);
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addrlb = ilbmScanlineDeltaNoBankSwitch(addrlb, yorg + y + dy, auxDst);
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slice.edge1.x += pDraw->x;
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slice.edge2.x += pDraw->x;
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while (y > 0) {
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ilbmScanlineIncNoBankSwitch(addrlt, auxDst);
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ilbmScanlineIncNoBankSwitch(addrlb, -auxDst);
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MIFILLARCSTEP(slw);
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MIARCSLICESTEP(slice.edge1);
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MIARCSLICESTEP(slice.edge2);
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if (miFillSliceUpper(slice)) {
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MIARCSLICEUPPER(xl, xr, slice, slw);
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FILLSLICESPANS(slice.flip_top, addrlt);
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}
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if (miFillSliceLower(slice)) {
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MIARCSLICELOWER(xl, xr, slice, slw);
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FILLSLICESPANS(slice.flip_bot, addrlb);
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}
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}
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}
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void
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ilbmPolyFillArcSolid(pDraw, pGC, narcs, parcs)
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register 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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ilbmPrivGC *priv;
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register xArc *arc;
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register int i;
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int x2, y2;
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BoxRec box;
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RegionPtr cclip;
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unsigned char *rrops;
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priv = (ilbmPrivGC *) pGC->devPrivates[ilbmGCPrivateIndex].ptr;
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rrops = priv->rrops;
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cclip = pGC->pCompositeClip;
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for (arc = parcs, i = narcs; --i >= 0; arc++) {
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if (miFillArcEmpty(arc))
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continue;
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if (miCanFillArc(arc)) {
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box.x1 = arc->x + pDraw->x;
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box.y1 = arc->y + pDraw->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)arc->width + 1;
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box.x2 = x2;
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y2 = box.y1 + (int)arc->height + 1;
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box.y2 = y2;
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if ( (x2 <= MAXSHORT) && (y2 <= MAXSHORT) &&
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(RECT_IN_REGION(pDraw->pScreen, cclip, &box) == rgnIN) ) {
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if ((arc->angle2 >= FULLCIRCLE) ||
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(arc->angle2 <= -FULLCIRCLE))
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ilbmFillEllipseSolid(pDraw, arc, rrops);
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else
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ilbmFillArcSliceSolidCopy(pDraw, pGC, arc, rrops);
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continue;
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}
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}
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miPolyFillArc(pDraw, pGC, 1, arc);
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}
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}
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