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diff --git a/ilbm/ilbmbitblt.c b/ilbm/ilbmbitblt.c
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+/* $XFree86: xc/programs/Xserver/ilbm/ilbmbitblt.c,v 3.2 1998/03/20 21:08:00 hohndel Exp $ */
+/* Combined Purdue/PurduePlus patches, level 2.0, 1/17/89 */
+/***********************************************************
+
+Copyright (c) 1987 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.
+
+
+Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
+
+ All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its
+documentation for any purpose and without fee is hereby granted,
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in
+supporting documentation, and that the name of Digital not be
+used in advertising or publicity pertaining to distribution of the
+software without specific, written prior permission.
+
+DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
+ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+SOFTWARE.
+
+******************************************************************/
+/* $XConsortium: ilbmbitblt.c,v 5.25 94/04/17 20:28:16 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 "regionstr.h"
+#include "gcstruct.h"
+#include "windowstr.h"
+#include "pixmapstr.h"
+#include "scrnintstr.h"
+
+#include "mi.h"
+
+#include "ilbm.h"
+#include "maskbits.h"
+
+
+static unsigned char ilbmRropsOS[AFB_MAX_DEPTH];
+
+/* CopyArea and CopyPlane for a monchrome frame buffer
+
+
+ clip the source rectangle to the source's available bits. (this
+avoids copying unnecessary pieces that will just get exposed anyway.)
+this becomes the new shape of the destination.
+ clip the destination region to the composite clip in the
+GC. this requires translating the destination region to (dstx, dsty).
+ build a list of source points, one for each rectangle in the
+destination. this is a simple translation.
+ go do the multiple rectangle copies
+ do graphics exposures
+*/
+/** Optimized for drawing pixmaps into windows, especially when drawing into
+ ** unobscured windows. Calls to the general-purpose region code were
+ ** replaced with rectangle-to-rectangle clipping comparisions. This is
+ ** possible, since the pixmap is a single rectangle. In an unobscured
+ ** window, the destination clip is also a single rectangle, and region
+ ** code can be avoided entirely. This is a big savings, since the region
+ ** code uses XAlloc() and makes many function calls.
+ **
+ ** In addition, if source is a pixmap, there is no need to call the
+ ** expensive miHandleExposures() routine. Instead, we simply return NULL.
+ **
+ ** Previously, drawing a pixmap into an unobscured window executed at least
+ ** 8 XAlloc()'s, 30 function calls, and hundreds of lines of code.
+ **
+ ** Now, the same operation requires no XAlloc()'s, no region function calls,
+ ** and much less overhead. Nice for drawing lots of small pixmaps.
+ */
+
+void
+ilbmDoBitblt(pSrc, pDst, alu, prgnDst, pptSrc, planemask)
+ DrawablePtr pSrc, pDst;
+ int alu;
+ RegionPtr prgnDst;
+ DDXPointPtr pptSrc;
+ unsigned long planemask;
+{
+ switch (alu) {
+ case GXcopy:
+ ilbmDoBitbltCopy(pSrc, pDst, alu, prgnDst, pptSrc, planemask);
+ break;
+ case GXxor:
+ ilbmDoBitbltXor(pSrc, pDst, alu, prgnDst, pptSrc, planemask);
+ break;
+ case GXcopyInverted:
+ ilbmDoBitbltCopyInverted(pSrc, pDst, alu, prgnDst, pptSrc, planemask);
+ break;
+ case GXor:
+ ilbmDoBitbltOr(pSrc, pDst, alu, prgnDst, pptSrc, planemask);
+ break;
+ default:
+ ilbmDoBitbltGeneral(pSrc, pDst, alu, prgnDst, pptSrc, planemask);
+ break;
+ }
+}
+
+RegionPtr
+ilbmCopyArea(pSrcDrawable, pDstDrawable, pGC, srcx, srcy, width, height,
+ dstx, dsty)
+ DrawablePtr pSrcDrawable;
+ DrawablePtr pDstDrawable;
+ GC *pGC;
+ int srcx, srcy;
+ int width, height;
+ int dstx, dsty;
+{
+ void (*doBitBlt)();
+
+ switch (pGC->alu) {
+ case GXcopy:
+ doBitBlt = ilbmDoBitbltCopy;
+ break;
+ case GXxor:
+ doBitBlt = ilbmDoBitbltXor;
+ break;
+ case GXcopyInverted:
+ doBitBlt = ilbmDoBitbltCopyInverted;
+ break;
+ case GXor:
+ doBitBlt = ilbmDoBitbltOr;
+ break;
+ default:
+ doBitBlt = ilbmDoBitbltGeneral;
+ break;
+ }
+
+ return(ilbmBitBlt(pSrcDrawable, pDstDrawable, pGC, srcx, srcy,
+ width, height, dstx, dsty, doBitBlt, pGC->planemask));
+}
+
+RegionPtr
+ilbmBitBlt(pSrcDrawable, pDstDrawable, pGC, srcx, srcy, width, height,
+ dstx, dsty, doBitBlt, planemask)
+ register DrawablePtr pSrcDrawable;
+ register DrawablePtr pDstDrawable;
+ register GC *pGC;
+ int srcx, srcy;
+ int width, height;
+ int dstx, dsty;
+ void (*doBitBlt)();
+ unsigned long planemask;
+{
+ RegionPtr prgnSrcClip; /* may be a new region, or just a copy */
+ Bool freeSrcClip = FALSE;
+
+ RegionPtr prgnExposed;
+ RegionRec rgnDst;
+ DDXPointPtr pptSrc;
+ register DDXPointPtr ppt;
+ register BoxPtr pbox;
+ int i;
+ register int dx;
+ register int dy;
+ xRectangle origSource;
+ DDXPointRec origDest;
+ int numRects;
+ BoxRec fastBox;
+ int fastClip = 0; /* for fast clipping with pixmap source */
+ int fastExpose = 0; /* for fast exposures with pixmap source */
+ void (*localDoBitBlt)();
+
+ origSource.x = srcx;
+ origSource.y = srcy;
+ origSource.width = width;
+ origSource.height = height;
+ origDest.x = dstx;
+ origDest.y = dsty;
+
+ if ((pSrcDrawable != pDstDrawable) && pSrcDrawable->pScreen->SourceValidate)
+ (*pSrcDrawable->pScreen->SourceValidate)(pSrcDrawable, srcx, srcy, width,
+ height);
+
+ srcx += pSrcDrawable->x;
+ srcy += pSrcDrawable->y;
+
+ /* clip the source */
+
+ if (pSrcDrawable->type == DRAWABLE_PIXMAP)
+ if ((pSrcDrawable == pDstDrawable) && (pGC->clientClipType == CT_NONE))
+ prgnSrcClip = pGC->pCompositeClip;
+ else
+ fastClip = 1;
+ else if (pGC->subWindowMode == IncludeInferiors)
+ if (!((WindowPtr)pSrcDrawable)->parent)
+ /*
+ * special case bitblt from root window in
+ * IncludeInferiors mode; just like from a pixmap
+ */
+ fastClip = 1;
+ else if ((pSrcDrawable == pDstDrawable) &&
+ (pGC->clientClipType == CT_NONE))
+ prgnSrcClip = pGC->pCompositeClip;
+ else {
+ prgnSrcClip = NotClippedByChildren((WindowPtr)pSrcDrawable);
+ freeSrcClip = TRUE;
+ }
+ else
+ prgnSrcClip = &((WindowPtr)pSrcDrawable)->clipList;
+
+ fastBox.x1 = srcx;
+ fastBox.y1 = srcy;
+ fastBox.x2 = srcx + width;
+ fastBox.y2 = srcy + height;
+
+ /* Don't create a source region if we are doing a fast clip */
+ if (fastClip) {
+ fastExpose = 1;
+ /*
+ * clip the source; if regions extend beyond the source size,
+ * make sure exposure events get sent
+ */
+ if (fastBox.x1 < pSrcDrawable->x) {
+ fastBox.x1 = pSrcDrawable->x;
+ fastExpose = 0;
+ }
+ if (fastBox.y1 < pSrcDrawable->y) {
+ fastBox.y1 = pSrcDrawable->y;
+ fastExpose = 0;
+ }
+ if (fastBox.x2 > pSrcDrawable->x + (int)pSrcDrawable->width) {
+ fastBox.x2 = pSrcDrawable->x + (int)pSrcDrawable->width;
+ fastExpose = 0;
+ }
+ if (fastBox.y2 > pSrcDrawable->y + (int)pSrcDrawable->height) {
+ fastBox.y2 = pSrcDrawable->y + (int)pSrcDrawable->height;
+ fastExpose = 0;
+ }
+ } else {
+ REGION_INIT(pGC->pScreen, &rgnDst, &fastBox, 1);
+ REGION_INTERSECT(pGC->pScreen, &rgnDst, &rgnDst, prgnSrcClip);
+ }
+
+ dstx += pDstDrawable->x;
+ dsty += pDstDrawable->y;
+
+ if (pDstDrawable->type == DRAWABLE_WINDOW)
+ if (!((WindowPtr)pDstDrawable)->realized) {
+ if (!fastClip)
+ REGION_UNINIT(pGC->pScreen, &rgnDst);
+ if (freeSrcClip)
+ REGION_DESTROY(pGC->pScreen, prgnSrcClip);
+ return NULL;
+ }
+
+ dx = srcx - dstx;
+ dy = srcy - dsty;
+
+ /* Translate and clip the dst to the destination composite clip */
+ if (fastClip) {
+ RegionPtr cclip;
+
+ /* Translate the region directly */
+ fastBox.x1 -= dx;
+ fastBox.x2 -= dx;
+ fastBox.y1 -= dy;
+ fastBox.y2 -= dy;
+
+ /* If the destination composite clip is one rectangle we can
+ do the clip directly. Otherwise we have to create a full
+ blown region and call intersect */
+ cclip = pGC->pCompositeClip;
+ if (REGION_NUM_RECTS(cclip) == 1) {
+ BoxPtr pBox = REGION_RECTS(cclip);
+
+ if (fastBox.x1 < pBox->x1)
+ fastBox.x1 = pBox->x1;
+ if (fastBox.x2 > pBox->x2)
+ fastBox.x2 = pBox->x2;
+ if (fastBox.y1 < pBox->y1)
+ fastBox.y1 = pBox->y1;
+ if (fastBox.y2 > pBox->y2)
+ fastBox.y2 = pBox->y2;
+
+ /* Check to see if the region is empty */
+ if (fastBox.x1 >= fastBox.x2 || fastBox.y1 >= fastBox.y2) {
+ REGION_INIT(pGC->pScreen, &rgnDst, NullBox, 0);
+ } else {
+ REGION_INIT(pGC->pScreen, &rgnDst, &fastBox, 1);
+ }
+ } else {
+ /* We must turn off fastClip now, since we must create
+ a full blown region. It is intersected with the
+ composite clip below. */
+ fastClip = 0;
+ REGION_INIT(pGC->pScreen, &rgnDst, &fastBox,1);
+ }
+ } else
+ REGION_TRANSLATE(pGC->pScreen, &rgnDst, -dx, -dy);
+
+ if (!fastClip) {
+ REGION_INTERSECT(pGC->pScreen, &rgnDst, &rgnDst, pGC->pCompositeClip);
+ }
+
+ /* Do bit blitting */
+ numRects = REGION_NUM_RECTS(&rgnDst);
+ if (numRects && width && height) {
+ if (!(pptSrc = (DDXPointPtr)ALLOCATE_LOCAL(numRects *
+ sizeof(DDXPointRec)))) {
+ REGION_UNINIT(pGC->pScreen, &rgnDst);
+ if (freeSrcClip)
+ REGION_DESTROY(pGC->pScreen, prgnSrcClip);
+ return NULL;
+ }
+ pbox = REGION_RECTS(&rgnDst);
+ ppt = pptSrc;
+ for (i = numRects; --i >= 0; pbox++, ppt++) {
+ ppt->x = pbox->x1 + dx;
+ ppt->y = pbox->y1 + dy;
+ }
+
+ (*doBitBlt)(pSrcDrawable, pDstDrawable, pGC->alu, &rgnDst, pptSrc,
+ planemask);
+
+ DEALLOCATE_LOCAL(pptSrc);
+ }
+
+ prgnExposed = NULL;
+ if (pGC->fExpose) {
+ /* Pixmap sources generate a NoExposed (we return NULL to do this) */
+ if (!fastExpose)
+ prgnExposed = miHandleExposures(pSrcDrawable, pDstDrawable, pGC,
+ origSource.x, origSource.y,
+ (int)origSource.width,
+ (int)origSource.height, origDest.x,
+ origDest.y, (unsigned long)0);
+ }
+ REGION_UNINIT(pGC->pScreen, &rgnDst);
+ if (freeSrcClip)
+ REGION_DESTROY(pGC->pScreen, prgnSrcClip);
+ return prgnExposed;
+}
+
+RegionPtr
+ilbmCopyPlane(pSrcDrawable, pDstDrawable, pGC, srcx, srcy, width, height,
+ dstx, dsty, plane)
+DrawablePtr pSrcDrawable, pDstDrawable;
+register GC *pGC;
+int srcx, srcy;
+int width, height;
+int dstx, dsty;
+unsigned long plane;
+{
+ int alu;
+ RegionPtr prgnExposed = NULL;
+ unsigned long old_planemask;
+ PixmapPtr pPixmap = NULL;
+
+ if (pDstDrawable->depth == 1) {
+ old_planemask = pGC->planemask;
+ pGC->planemask = plane;
+ if ((pGC->fgPixel & 1) == 1 && (pGC->bgPixel & 1) == 0) {
+ prgnExposed = (*pGC->ops->CopyArea)(pSrcDrawable, pDstDrawable,
+ pGC, srcx, srcy, width, height, dstx, dsty);
+ } else if ((pGC->fgPixel & 1) == (pGC->bgPixel & 1)) {
+ unsigned char rop;
+
+ ilbmReduceRop(pGC->alu, pGC->fgPixel, 1, 1, &rop);
+ alu = pGC->alu;
+ pGC->alu = rop;
+ prgnExposed = (*pGC->ops->CopyArea)(pSrcDrawable, pDstDrawable, pGC,
+ srcx, srcy, width, height, dstx,
+ dsty);
+ pGC->alu = alu;
+ } else { /* need to invert the src */
+ alu = pGC->alu;
+ pGC->alu = ilbmInverseAlu[alu];
+ prgnExposed = (*pGC->ops->CopyArea)(pSrcDrawable, pDstDrawable, pGC,
+ srcx, srcy, width, height, dstx,
+ dsty);
+ pGC->alu = alu;
+ }
+ pGC->planemask = old_planemask;
+ } else {
+ int free_pixmap = FALSE;
+ PixmapPtr pBitmap = (PixmapPtr)pSrcDrawable;
+ ScreenPtr pScreen = pSrcDrawable->pScreen;
+ GCPtr pGC1;
+
+ if (pSrcDrawable == pDstDrawable ||
+ pSrcDrawable->type == DRAWABLE_WINDOW || pSrcDrawable->depth != 1) {
+ /* Copy a plane from source drawable to a tmp 1-bit deep pixmap */
+ /* XXX: Range check width and height */
+ pBitmap = (*pScreen->CreatePixmap)(pScreen, width, height, 1);
+
+ if (!pBitmap)
+ return(NULL);
+ pGC1 = GetScratchGC(1, pScreen);
+ if (!pGC1) {
+ (*pScreen->DestroyPixmap)(pBitmap);
+ return(NULL);
+ }
+ ValidateGC((DrawablePtr)pBitmap, pGC1);
+ (void)ilbmBitBlt(pSrcDrawable, (DrawablePtr)pBitmap, pGC1, srcx, srcy,
+ width, height, 0, 0, ilbmDoBitbltCopy, plane);
+ free_pixmap = TRUE;
+ }
+#if 0
+ else {
+ /* XXX: could cope with N-deep pixmap source case without using tmp
+ * src bitmap by setting up a scratch pixmap header and fiddle
+ * around with the pbits pointer.
+ */
+ }
+#endif
+ ilbmReduceOpaqueStipple(pGC->fgPixel, pGC->bgPixel, pGC->planemask,
+ pGC->depth, ilbmRropsOS);
+ (void)ilbmBitBlt((DrawablePtr)pBitmap, pDstDrawable, pGC, 0, 0, width,
+ height, dstx, dsty, ilbmCopy1ToN, pGC->planemask);
+ if (free_pixmap) {
+ (*pScreen->DestroyPixmap)(pBitmap);
+ FreeScratchGC(pGC1);
+ }
+
+ if (pGC->fExpose)
+ prgnExposed = miHandleExposures(pSrcDrawable, pDstDrawable, pGC, srcx,
+ srcy, width, height, dstx, dsty,
+ plane);
+ }
+ return prgnExposed;
+}
+
+void
+ilbmCopy1ToN(pSrc, pDst, alu, prgnDst, pptSrc, planemask)
+ DrawablePtr pSrc, pDst;
+ int alu;
+ RegionPtr prgnDst;
+ DDXPointPtr pptSrc;
+ unsigned long planemask;
+{
+ int numRects = REGION_NUM_RECTS(prgnDst);
+ BoxPtr pbox = REGION_RECTS(prgnDst);
+ int r;
+
+ for (r = 0; r < numRects; r++, pbox++, pptSrc++) {
+ int dx = pptSrc->x;
+ int dy = pptSrc->y;
+
+ if (alu == GXcopy)
+ ilbmOpaqueStippleAreaCopy(pDst, 1, pbox, alu, (PixmapPtr)pSrc, dx, dy,
+ ilbmRropsOS, planemask);
+ else
+ ilbmOpaqueStippleAreaGeneral(pDst, 1, pbox, alu, (PixmapPtr)pSrc, dx,
+ dy, ilbmRropsOS, planemask);
+ }
+}
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