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+/* $XFree86: xc/programs/Xserver/afb/afbpushpxl.c,v 3.1 1998/03/20 21:04:56 hohndel Exp $ */
+/***********************************************************
+
+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: afbpushpxl.c,v 5.6 94/04/17 20:28:31 dpw Exp $ */
+
+#include "X.h"
+#include "gcstruct.h"
+#include "scrnintstr.h"
+#include "pixmapstr.h"
+#include "miscstruct.h"
+#include "maskbits.h"
+#include "regionstr.h"
+#include "afb.h"
+
+/*  afbSolidPP is courtesy of xhacks@csri.toronto.edu
+
+	For fillStyle==FillSolid, a monochrome PushPixels can be reduced to
+	a ROP in the following way:  (Note that the ROP is the same as the
+	result of ROP(src=0x3,dst=0x5))
+
+								src=0011 0000 0011
+								dst=0101 0101 0101
+								rop	  fg=0 fg=1
+		GXclear				0x0 0000 0100 0100 0
+		GXand					0x1 0001 0100 0101  s&d
+		GXandReverse		0x2 0010 0100 0110 s&~d
+		GXcopy				0x3 0011 0100 0111 s
+		GXandInverted		0x4 0100 0101 0100 ~s&d
+		GXnoop				0x5 0101 0101 0101 d
+		GXxor					0x6 0110 0101 0110 s^d
+		GXor					0x7 0111 0101 0111 s|d
+		GXnor					0x8 1000 0110 0100 ~s&~d
+		GXequiv				0x9 1001 0110 0101 ~s^d
+		GXinvert				0xa 1010 0110 0110 ~d
+		GXorReverse			0xb 1011 0110 0111 s|~d
+		GXcopyInverted		0xc 1100 0111 0100 ~s
+		GXorInverted		0xd 1101 0111 0101 ~s|d
+		GXnand				0xe 1110 0111 0110 ~s|~d
+		GXset					0xf 1111 0111 0111 1
+
+For src=0: newRop = 0x4|(rop>>2)
+For src=1: newRop = 0x4|(rop&3)
+*/
+
+/* afbSolidPP -- squeegees the forground color of pGC through pBitMap
+ * into pDrawable.  pBitMap is a stencil (dx by dy of it is used, it may
+ * be bigger) which is placed on the drawable at xOrg, yOrg.  Where a 1 bit
+ * is set in the bitmap, the fill style is put onto the drawable using
+ * the GC's logical function. The drawable is not changed where the bitmap
+ * has a zero bit or outside the area covered by the stencil.
+ */
+void
+afbSolidPP(pGC, pBitMap, pDrawable, dx, dy, xOrg, yOrg)
+	GCPtr		pGC;
+	PixmapPtr		pBitMap;
+	DrawablePtr pDrawable;
+	int				dx, dy, xOrg, yOrg;
+{
+	unsigned char alu;
+	RegionRec rgnDst;
+	DDXPointPtr pptSrc;
+	BoxRec srcBox;
+	register DDXPointPtr ppt;
+	register BoxPtr pbox;
+	int i;
+
+	if (!pGC->planemask & 1) return;
+
+	/* compute the reduced rop function */
+	alu = pGC->alu;
+	if (!(pGC->fgPixel&1)) alu >>= 2;
+	alu = (alu & 0x3) | 0x4;
+	if (alu == GXnoop) return;
+
+	srcBox.x1 = xOrg;
+	srcBox.y1 = yOrg;
+	srcBox.x2 = xOrg + dx;
+	srcBox.y2 = yOrg + dy;
+	REGION_INIT(pGC->pScreen, &rgnDst, &srcBox, 1);
+
+	/* clip the shape of the dst to the destination composite clip */
+	REGION_INTERSECT(pGC->pScreen, &rgnDst, &rgnDst, pGC->pCompositeClip);
+
+	if (!REGION_NIL(&rgnDst)) {
+		i = REGION_NUM_RECTS(&rgnDst);
+		pptSrc = (DDXPointPtr)ALLOCATE_LOCAL(i * sizeof(DDXPointRec));
+		if(pptSrc) {
+			for (pbox = REGION_RECTS(&rgnDst), ppt = pptSrc; --i >= 0;
+				  pbox++, ppt++) {
+				ppt->x = pbox->x1 - xOrg;
+				ppt->y = pbox->y1 - yOrg;
+			}
+			afbDoBitblt((DrawablePtr)pBitMap, pDrawable, alu, &rgnDst, pptSrc,
+							 pGC->planemask);
+			DEALLOCATE_LOCAL(pptSrc);
+		}
+	}
+	REGION_UNINIT(pGC->pScreen, &rgnDst);
+}
+
+#define NPT 128
+
+/* afbPushPixels -- squeegees the forground color of pGC through pBitMap
+ * into pDrawable.  pBitMap is a stencil (dx by dy of it is used, it may
+ * be bigger) which is placed on the drawable at xOrg, yOrg.  Where a 1 bit
+ * is set in the bitmap, the fill style is put onto the drawable using
+ * the GC's logical function. The drawable is not changed where the bitmap
+ * has a zero bit or outside the area covered by the stencil.
+ */
+void
+afbPushPixels(pGC, pBitMap, pDrawable, dx, dy, xOrg, yOrg)
+	GCPtr pGC;
+	PixmapPtr pBitMap;
+	DrawablePtr pDrawable;
+	int dx, dy, xOrg, yOrg;
+{
+	int h, dxDivPPW, ibEnd;
+	PixelType *pwLineStart;
+	register PixelType *pw, *pwEnd;
+	register PixelType mask;
+	register int ib;
+	register PixelType w;
+	register int ipt;				/* index into above arrays */
+	Bool fInBox;
+	DDXPointRec pt[NPT];
+	int width[NPT];
+
+	/* Now scan convert the pixmap and use the result to call fillspans in
+	 * in the drawable with the original GC */
+	ipt = 0;
+	dxDivPPW = dx/PPW;
+	for (h = 0; h < dy; h++) {
+
+		pw = (PixelType *)
+			  (((char *)(pBitMap->devPrivate.ptr))+(h * pBitMap->devKind));
+		pwLineStart = pw;
+		/* Process all words which are fully in the pixmap */
+
+		fInBox = FALSE;
+		pwEnd = pwLineStart + dxDivPPW;
+		while(pw  < pwEnd) {
+			w = *pw;
+			mask = endtab[1];
+			for(ib = 0; ib < PPW; ib++) {
+				if(w & mask) {
+					if(!fInBox) {
+						pt[ipt].x = ((pw - pwLineStart) << PWSH) + ib + xOrg;
+						pt[ipt].y = h + yOrg;
+						/* start new box */
+						fInBox = TRUE;
+					}
+				} else {
+					if(fInBox) {
+						width[ipt] = ((pw - pwLineStart) << PWSH) +
+									 ib + xOrg - pt[ipt].x;
+						if (++ipt >= NPT) {
+							(*pGC->ops->FillSpans)(pDrawable, pGC, NPT, pt,
+											  width, TRUE);
+							ipt = 0;
+						}
+						/* end box */
+						fInBox = FALSE;
+					}
+				}
+				mask = SCRRIGHT(mask, 1);
+			}
+			pw++;
+		}
+		ibEnd = dx & PIM;
+		if(ibEnd) {
+			/* Process final partial word on line */
+			w = *pw;
+			mask = endtab[1];
+			for(ib = 0; ib < ibEnd; ib++) {
+				if(w & mask) {
+					if(!fInBox) {
+						/* start new box */
+						pt[ipt].x = ((pw - pwLineStart) << PWSH) + ib + xOrg;
+						pt[ipt].y = h + yOrg;
+						fInBox = TRUE;
+					}
+				} else {
+					if(fInBox) {
+						/* end box */
+						width[ipt] = ((pw - pwLineStart) << PWSH) +
+									 ib + xOrg - pt[ipt].x;
+						if (++ipt >= NPT) {
+							(*pGC->ops->FillSpans)(pDrawable, pGC, NPT, pt,
+											  width, TRUE);
+							ipt = 0;
+						}
+						fInBox = FALSE;
+					}
+				}
+				mask = SCRRIGHT(mask, 1);
+			}
+		}
+		/* If scanline ended with last bit set, end the box */
+		if(fInBox) {
+			width[ipt] = dx + xOrg - pt[ipt].x;
+			if (++ipt >= NPT) {
+				(*pGC->ops->FillSpans)(pDrawable, pGC, NPT, pt, width, TRUE);
+				ipt = 0;
+			}
+		}
+	}
+	/* Flush any remaining spans */
+	if (ipt) {
+		(*pGC->ops->FillSpans)(pDrawable, pGC, ipt, pt, width, TRUE);
+	}
+}