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-rw-r--r--ilbm/ilbmfillarc.c373
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diff --git a/ilbm/ilbmfillarc.c b/ilbm/ilbmfillarc.c
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+++ b/ilbm/ilbmfillarc.c
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+/* $XFree86: xc/programs/Xserver/ilbm/ilbmfillarc.c,v 3.1 1998/03/20 21:08:01 hohndel Exp $ */
+/************************************************************
+
+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: ilbmfillarc.c,v 5.14 94/04/17 20:28:20 dpw Exp $ */
+
+/* Modified jun 95 by Geert Uytterhoeven (Geert.Uytterhoeven@cs.kuleuven.ac.be)
+ to use interleaved bitplanes instead of normal bitplanes */
+
+#include "X.h"
+#include "Xprotostr.h"
+#include "miscstruct.h"
+#include "gcstruct.h"
+#include "pixmapstr.h"
+#include "scrnintstr.h"
+#include "ilbm.h"
+#include "maskbits.h"
+#include "mifillarc.h"
+#include "mi.h"
+
+static void
+ilbmFillEllipseSolid(pDraw, arc, rrops)
+ DrawablePtr pDraw;
+ xArc *arc;
+ register unsigned char *rrops;
+{
+ int x, y, e;
+ int yk, xk, ym, xm, dx, dy, xorg, yorg;
+ register int slw;
+ miFillArcRec info;
+ PixelType *addrlt, *addrlb;
+ register PixelType *pdst;
+ PixelType *addrl;
+ register int n;
+ register int d;
+ int nlwidth;
+ register int xpos;
+ PixelType startmask, endmask;
+ int nlmiddle;
+ int depthDst;
+ int auxDst;
+
+ ilbmGetPixelWidthAuxDepthAndPointer(pDraw, nlwidth, auxDst, depthDst,
+ addrlt);
+ miFillArcSetup(arc, &info);
+ MIFILLARCSETUP();
+ xorg += pDraw->x;
+ yorg += pDraw->y;
+ addrlb = addrlt;
+ addrlt += auxDst * (yorg - y);
+ addrlb += auxDst * (yorg + y + dy);
+ while (y) {
+ addrlt += auxDst;
+ addrlb -= auxDst;
+ MIFILLARCSTEP(slw);
+ if (!slw)
+ continue;
+ xpos = xorg - x;
+ pdst = addrl = ilbmScanlineOffset(addrlt, (xpos >> PWSH));
+ if (((xpos & PIM) + slw) < PPW) {
+ maskpartialbits(xpos, slw, startmask);
+ for (d = 0; d < depthDst; d++, pdst += nlwidth) { /* @@@ NEXT PLANE @@@ */
+ switch (rrops[d]) {
+ case RROP_BLACK:
+ *pdst &= ~startmask;
+ break;
+ case RROP_WHITE:
+ *pdst |= startmask;
+ break;
+ case RROP_INVERT:
+ *pdst ^= startmask;
+ break;
+ case RROP_NOP:
+ break;
+ }
+ }
+ if (miFillArcLower(slw)) {
+ pdst = ilbmScanlineOffset(addrlb, (xpos >> PWSH));
+
+ for (d = 0; d < depthDst; d++, pdst += nlwidth) { /* @@@ NEXT PLANE @@@ */
+ switch (rrops[d]) {
+ case RROP_BLACK:
+ *pdst &= ~startmask;
+ break;
+ case RROP_WHITE:
+ *pdst |= startmask;
+ break;
+ case RROP_INVERT:
+ *pdst ^= startmask;
+ break;
+ case RROP_NOP:
+ break;
+ }
+ }
+ }
+ continue;
+ }
+ maskbits(xpos, slw, startmask, endmask, nlmiddle);
+ for (d = 0; d < depthDst; d++, addrl += nlwidth) { /* @@@ NEXT PLANE @@@ */
+ n = nlmiddle;
+ pdst = addrl;
+
+ switch (rrops[d]) {
+ case RROP_BLACK:
+ if (startmask)
+ *pdst++ &= ~startmask;
+ while (n--)
+ *pdst++ = 0;
+ if (endmask)
+ *pdst &= ~endmask;
+ break;
+
+ case RROP_WHITE:
+ if (startmask)
+ *pdst++ |= startmask;
+ while (n--)
+ *pdst++ = ~0;
+ if (endmask)
+ *pdst |= endmask;
+ break;
+
+ case RROP_INVERT:
+ if (startmask)
+ *pdst++ ^= startmask;
+ while (n--)
+ *pdst++ ^= ~0;
+ if (endmask)
+ *pdst ^= endmask;
+ break;
+
+ case RROP_NOP:
+ break;
+ }
+ }
+ if (!miFillArcLower(slw))
+ continue;
+ addrl = ilbmScanlineOffset(addrlb, (xpos >> PWSH));
+ for (d = 0; d < depthDst; d++, addrl += nlwidth) { /* @@@ NEXT PLANE @@@ */
+ n = nlmiddle;
+ pdst = addrl;
+
+ switch (rrops[d]) {
+ case RROP_BLACK:
+ if (startmask)
+ *pdst++ &= ~startmask;
+ while (n--)
+ *pdst++ = 0;
+ if (endmask)
+ *pdst &= ~endmask;
+ break;
+
+ case RROP_WHITE:
+ if (startmask)
+ *pdst++ |= startmask;
+ while (n--)
+ *pdst++ = ~0;
+ if (endmask)
+ *pdst |= endmask;
+ break;
+
+ case RROP_INVERT:
+ if (startmask)
+ *pdst++ ^= startmask;
+ while (n--)
+ *pdst++ ^= ~0;
+ if (endmask)
+ *pdst ^= endmask;
+ break;
+
+ case RROP_NOP:
+ break;
+ }
+ }
+ }
+}
+
+#define FILLSPAN(xl,xr,addr) \
+ if (xr >= xl) { \
+ width = xr - xl + 1; \
+ addrl = ilbmScanlineOffset(addr, (xl >> PWSH)); \
+ if (((xl & PIM) + width) < PPW) { \
+ maskpartialbits(xl, width, startmask); \
+ for (pdst = addrl, d = 0; d < depthDst; d++, pdst += nlwidth) { /* @@@ NEXT PLANE @@@ */ \
+ switch (rrops[d]) { \
+ case RROP_BLACK: \
+ *pdst &= ~startmask; \
+ break; \
+ case RROP_WHITE: \
+ *pdst |= startmask; \
+ break; \
+ case RROP_INVERT: \
+ *pdst ^= startmask; \
+ break; \
+ case RROP_NOP: \
+ break; \
+ } \
+ } \
+ } else { \
+ maskbits(xl, width, startmask, endmask, nlmiddle); \
+ for (d = 0; d < depthDst; d++, addrl += nlwidth) { /* @@@ NEXT PLANE @@@ */ \
+ n = nlmiddle; \
+ pdst = addrl; \
+ switch (rrops[d]) { \
+ case RROP_BLACK: \
+ if (startmask) \
+ *pdst++ &= ~startmask; \
+ while (n--) \
+ *pdst++ = 0; \
+ if (endmask) \
+ *pdst &= ~endmask; \
+ break; \
+ case RROP_WHITE: \
+ if (startmask) \
+ *pdst++ |= startmask; \
+ while (n--) \
+ *pdst++ = ~0; \
+ if (endmask) \
+ *pdst |= endmask; \
+ break; \
+ case RROP_INVERT: \
+ if (startmask) \
+ *pdst++ ^= startmask; \
+ while (n--) \
+ *pdst++ ^= ~0; \
+ if (endmask) \
+ *pdst ^= endmask; \
+ break; \
+ case RROP_NOP: \
+ break; \
+ } \
+ } \
+ } \
+ }
+
+#define FILLSLICESPANS(flip,addr) \
+ if (!flip) { \
+ FILLSPAN(xl, xr, addr); \
+ } else { \
+ xc = xorg - x; \
+ FILLSPAN(xc, xr, addr); \
+ xc += slw - 1; \
+ FILLSPAN(xl, xc, addr); \
+ }
+
+static void
+ilbmFillArcSliceSolidCopy(pDraw, pGC, arc, rrops)
+ DrawablePtr pDraw;
+ GCPtr pGC;
+ xArc *arc;
+ register unsigned char *rrops;
+{
+ PixelType *addrl;
+ register PixelType *pdst;
+ register int n;
+ register int d;
+ int yk, xk, ym, xm, dx, dy, xorg, yorg, slw;
+ register int x, y, e;
+ miFillArcRec info;
+ miArcSliceRec slice;
+ int xl, xr, xc;
+ PixelType *addrlt, *addrlb;
+ int nlwidth;
+ int width;
+ PixelType startmask, endmask;
+ int nlmiddle;
+ int auxDst;
+ int depthDst;
+
+ ilbmGetPixelWidthAuxDepthAndPointer(pDraw, nlwidth, auxDst, depthDst,
+ addrlt);
+ miFillArcSetup(arc, &info);
+ miFillArcSliceSetup(arc, &slice, pGC);
+ MIFILLARCSETUP();
+ xorg += pDraw->x;
+ yorg += pDraw->y;
+ addrlb = addrlt;
+ addrlt = ilbmScanlineDeltaNoBankSwitch(addrlt, yorg - y, auxDst);
+ addrlb = ilbmScanlineDeltaNoBankSwitch(addrlb, yorg + y + dy, auxDst);
+ slice.edge1.x += pDraw->x;
+ slice.edge2.x += pDraw->x;
+ while (y > 0) {
+ ilbmScanlineIncNoBankSwitch(addrlt, auxDst);
+ ilbmScanlineIncNoBankSwitch(addrlb, -auxDst);
+ MIFILLARCSTEP(slw);
+ MIARCSLICESTEP(slice.edge1);
+ MIARCSLICESTEP(slice.edge2);
+ if (miFillSliceUpper(slice)) {
+ MIARCSLICEUPPER(xl, xr, slice, slw);
+ FILLSLICESPANS(slice.flip_top, addrlt);
+ }
+ if (miFillSliceLower(slice)) {
+ MIARCSLICELOWER(xl, xr, slice, slw);
+ FILLSLICESPANS(slice.flip_bot, addrlb);
+ }
+ }
+}
+
+void
+ilbmPolyFillArcSolid(pDraw, pGC, narcs, parcs)
+ register DrawablePtr pDraw;
+ GCPtr pGC;
+ int narcs;
+ xArc *parcs;
+{
+ ilbmPrivGC *priv;
+ register xArc *arc;
+ register int i;
+ int x2, y2;
+ BoxRec box;
+ RegionPtr cclip;
+ unsigned char *rrops;
+
+ priv = (ilbmPrivGC *) pGC->devPrivates[ilbmGCPrivateIndex].ptr;
+ rrops = priv->rrops;
+ cclip = pGC->pCompositeClip;
+ for (arc = parcs, i = narcs; --i >= 0; arc++) {
+ if (miFillArcEmpty(arc))
+ continue;
+ if (miCanFillArc(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) ) {
+ if ((arc->angle2 >= FULLCIRCLE) ||
+ (arc->angle2 <= -FULLCIRCLE))
+ ilbmFillEllipseSolid(pDraw, arc, rrops);
+ else
+ ilbmFillArcSliceSolidCopy(pDraw, pGC, arc, rrops);
+ continue;
+ }
+ }
+ miPolyFillArc(pDraw, pGC, 1, arc);
+ }
+}
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