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- /* Combined Purdue/PurduePlus patches, level 2.0, 1/17/89 */
- /***********************************************************
- Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts,
- and the Massachusetts Institute of Technology, Cambridge, 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 names of Digital or MIT 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: mfbbitblt.c,v 5.14 90/02/08 13:29:24 rws Exp $ */
- #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 "mfb.h"
- #include "maskbits.h"
-
-
- /* 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.
- */
-
- RegionPtr
- mfbCopyArea(pSrcDrawable, pDstDrawable,
- pGC, srcx, srcy, width, height, dstx, dsty)
- register DrawablePtr pSrcDrawable;
- register DrawablePtr pDstDrawable;
- register GC *pGC;
- int srcx, srcy;
- int width, height;
- int dstx, dsty;
- {
- 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 */
-
- 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 = ((mfbPrivGC *)(pGC->devPrivates[mfbGCPrivateIndex].ptr))->pCompositeClip;
- }
- else
- {
- /* Pixmap sources generate simple exposure events */
- fastExpose = 1;
-
- /* Pixmap is just one clipping rectangle so we can avoid
- allocating a full-blown region. */
- fastClip = 1;
-
- fastBox.x1 = srcx;
- fastBox.y1 = srcy;
- fastBox.x2 = srcx + width;
- fastBox.y2 = srcy + height;
-
- /* Left and top are already clipped, so clip right and bottom */
- if (fastBox.x2 > pSrcDrawable->x + (int) pSrcDrawable->width)
- fastBox.x2 = pSrcDrawable->x + (int) pSrcDrawable->width;
- if (fastBox.y2 > pSrcDrawable->y + (int) pSrcDrawable->height)
- fastBox.y2 = pSrcDrawable->y + (int) pSrcDrawable->height;
- }
- }
- else
- {
- if (pGC->subWindowMode == IncludeInferiors)
- {
- if ((pSrcDrawable == pDstDrawable) &&
- (pGC->clientClipType == CT_NONE))
- {
- prgnSrcClip = ((mfbPrivGC *)(pGC->devPrivates[mfbGCPrivateIndex].ptr))->pCompositeClip;
- }
- else
- {
- prgnSrcClip = NotClippedByChildren((WindowPtr)pSrcDrawable);
- freeSrcClip = TRUE;
- }
- }
- else
- {
- prgnSrcClip = &((WindowPtr)pSrcDrawable)->clipList;
- }
- }
-
- /* Don't create a source region if we are doing a fast clip */
- if (!fastClip)
- {
- BoxRec srcBox;
-
- srcBox.x1 = srcx;
- srcBox.y1 = srcy;
- srcBox.x2 = srcx + width;
- srcBox.y2 = srcy + height;
-
- (*pGC->pScreen->RegionInit)(&rgnDst, &srcBox, 1);
- (*pGC->pScreen->Intersect)(&rgnDst, &rgnDst, prgnSrcClip);
- }
-
- dstx += pDstDrawable->x;
- dsty += pDstDrawable->y;
-
- if (pDstDrawable->type == DRAWABLE_WINDOW)
- {
- if (!((WindowPtr)pDstDrawable)->realized)
- {
- if (!fastClip)
- (*pGC->pScreen->RegionUninit)(&rgnDst);
- if (freeSrcClip)
- (*pGC->pScreen->RegionDestroy)(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 = ((mfbPrivGC *)(pGC->devPrivates[mfbGCPrivateIndex].ptr))->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)
- (*pGC->pScreen->RegionInit)(&rgnDst, NullBox, 0);
- else
- (*pGC->pScreen->RegionInit)(&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;
- (*pGC->pScreen->RegionInit)(&rgnDst, &fastBox,1);
- }
- }
- else
- {
- (*pGC->pScreen->TranslateRegion)(&rgnDst, -dx, -dy);
- }
-
- if (!fastClip)
- {
- (*pGC->pScreen->Intersect)(&rgnDst,
- &rgnDst,
- ((mfbPrivGC *)(pGC->devPrivates[mfbGCPrivateIndex].ptr))->pCompositeClip);
- }
-
- /* Do bit blitting */
- numRects = REGION_NUM_RECTS(&rgnDst);
- if (numRects)
- {
- if(!(pptSrc = (DDXPointPtr)ALLOCATE_LOCAL(numRects *
- sizeof(DDXPointRec))))
- {
- (*pGC->pScreen->RegionUninit)(&rgnDst);
- if (freeSrcClip)
- (*pGC->pScreen->RegionDestroy)(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;
- }
-
- if (pGC->planemask & 1)
- mfbDoBitblt(pSrcDrawable, pDstDrawable, pGC->alu, &rgnDst, pptSrc);
- DEALLOCATE_LOCAL(pptSrc);
- }
-
- prgnExposed = NULL;
- if (((mfbPrivGC *)(pGC->devPrivates[mfbGCPrivateIndex].ptr))->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);
- }
- (*pGC->pScreen->RegionUninit)(&rgnDst);
- if (freeSrcClip)
- (*pGC->pScreen->RegionDestroy)(prgnSrcClip);
- return prgnExposed;
- }
-
- /* DoBitblt() does multiple rectangle moves into the rectangles
- DISCLAIMER:
- this code can be made much faster; this implementation is
- designed to be independent of byte/bit order, processor
- instruction set, and the like. it could probably be done
- in a similarly device independent way using mask tables instead
- of the getbits/putbits macros. the narrow case (w<32) can be
- subdivided into a case that crosses word boundaries and one that
- doesn't.
-
- we have to cope with the dircetion on a per band basis,
- rather than a per rectangle basis. moving bottom to top
- means we have to invert the order of the bands; moving right
- to left requires reversing the order of the rectangles in
- each band.
-
- if src or dst is a window, the points have already been
- translated.
- */
-
- #ifdef FASTGETBITS
- #define getunalignedword(psrc, x, dst) { \
- register int _tmp; \
- FASTGETBITS(psrc, x, 32, _tmp); \
- dst = _tmp; \
- }
- #else
- #define getunalignedword(psrc, x, dst) \
- { \
- dst = (SCRLEFT((unsigned) *(psrc), (x))) | \
- (SCRRIGHT((unsigned) *((psrc)+1), 32-(x))); \
- }
- #endif /* FASTGETBITS */
-
- #include "fastblt.h"
-
- mfbDoBitblt(pSrcDrawable, pDstDrawable, alu, prgnDst, pptSrc)
- DrawablePtr pSrcDrawable;
- DrawablePtr pDstDrawable;
- unsigned char alu;
- RegionPtr prgnDst;
- DDXPointPtr pptSrc;
- {
- unsigned int *psrcBase, *pdstBase;
- /* start of src and dst bitmaps */
- int widthSrc, widthDst; /* add to get to same position in next line */
-
- register BoxPtr pbox;
- int nbox;
-
- BoxPtr pboxTmp, pboxNext, pboxBase, pboxNew1, pboxNew2;
- /* temporaries for shuffling rectangles */
- DDXPointPtr pptTmp, pptNew1, pptNew2;
- /* shuffling boxes entails shuffling the
- source points too */
- int w, h;
- int xdir; /* 1 = left right, -1 = right left/ */
- int ydir; /* 1 = top down, -1 = bottom up */
-
- unsigned int *psrcLine, *pdstLine;
- /* pointers to line with current src and dst */
- register unsigned int *psrc;/* pointer to current src longword */
- register unsigned int *pdst;/* pointer to current dst longword */
-
- /* following used for looping through a line */
- unsigned int startmask, endmask; /* masks for writing ends of dst */
- int nlMiddle; /* whole longwords in dst */
- register int nl; /* temp copy of nlMiddle */
- register unsigned int tmpSrc;
- /* place to store full source word */
- register int xoffSrc; /* offset (>= 0, < 32) from which to
- fetch whole longwords fetched
- in src */
- int nstart; /* number of ragged bits at start of dst */
- int nend; /* number of ragged bits at end of dst */
- int srcStartOver; /* pulling nstart bits from src
- overflows into the next word? */
- int careful;
-
-
- if (pSrcDrawable->type == DRAWABLE_WINDOW)
- {
- psrcBase = (unsigned int *)
- (((PixmapPtr)(pSrcDrawable->pScreen->devPrivate))->devPrivate.ptr);
- widthSrc = (int)
- ((PixmapPtr)(pSrcDrawable->pScreen->devPrivate))->devKind
- >> 2;
- }
- else
- {
- psrcBase = (unsigned int *)(((PixmapPtr)pSrcDrawable)->devPrivate.ptr);
- widthSrc = (int)(((PixmapPtr)pSrcDrawable)->devKind) >> 2;
- }
-
- if (pDstDrawable->type == DRAWABLE_WINDOW)
- {
- pdstBase = (unsigned int *)
- (((PixmapPtr)(pDstDrawable->pScreen->devPrivate))->devPrivate.ptr);
- widthDst = (int)
- ((PixmapPtr)(pDstDrawable->pScreen->devPrivate))->devKind
- >> 2;
- }
- else
- {
- pdstBase = (unsigned int *)(((PixmapPtr)pDstDrawable)->devPrivate.ptr);
- widthDst = (int)(((PixmapPtr)pDstDrawable)->devKind) >> 2;
- }
-
- /* XXX we have to err on the side of safety when both are windows,
- * because we don't know if IncludeInferiors is being used.
- */
- careful = ((pSrcDrawable == pDstDrawable) ||
- ((pSrcDrawable->type == DRAWABLE_WINDOW) &&
- (pDstDrawable->type == DRAWABLE_WINDOW)));
-
- pbox = REGION_RECTS(prgnDst);
- nbox = REGION_NUM_RECTS(prgnDst);
-
- pboxNew1 = NULL;
- pptNew1 = NULL;
- pboxNew2 = NULL;
- pptNew2 = NULL;
- if (careful && (pptSrc->y < pbox->y1))
- {
- /* walk source botttom to top */
- ydir = -1;
- widthSrc = -widthSrc;
- widthDst = -widthDst;
-
- if (nbox > 1)
- {
- /* keep ordering in each band, reverse order of bands */
- pboxNew1 = (BoxPtr)ALLOCATE_LOCAL(sizeof(BoxRec) * nbox);
- if(!pboxNew1)
- return;
- pptNew1 = (DDXPointPtr)ALLOCATE_LOCAL(sizeof(DDXPointRec) * nbox);
- if(!pptNew1)
- {
- DEALLOCATE_LOCAL(pboxNew1);
- return;
- }
- pboxBase = pboxNext = pbox+nbox-1;
- while (pboxBase >= pbox)
- {
- while ((pboxNext >= pbox) &&
- (pboxBase->y1 == pboxNext->y1))
- pboxNext--;
- pboxTmp = pboxNext+1;
- pptTmp = pptSrc + (pboxTmp - pbox);
- while (pboxTmp <= pboxBase)
- {
- *pboxNew1++ = *pboxTmp++;
- *pptNew1++ = *pptTmp++;
- }
- pboxBase = pboxNext;
- }
- pboxNew1 -= nbox;
- pbox = pboxNew1;
- pptNew1 -= nbox;
- pptSrc = pptNew1;
- }
- }
- else
- {
- /* walk source top to bottom */
- ydir = 1;
- }
-
- if (careful && (pptSrc->x < pbox->x1))
- {
- /* walk source right to left */
- xdir = -1;
-
- if (nbox > 1)
- {
- /* reverse order of rects in each band */
- pboxNew2 = (BoxPtr)ALLOCATE_LOCAL(sizeof(BoxRec) * nbox);
- pptNew2 = (DDXPointPtr)ALLOCATE_LOCAL(sizeof(DDXPointRec) * nbox);
- if(!pboxNew2 || !pptNew2)
- {
- if (pptNew2) DEALLOCATE_LOCAL(pptNew2);
- if (pboxNew2) DEALLOCATE_LOCAL(pboxNew2);
- if (pboxNew1)
- {
- DEALLOCATE_LOCAL(pptNew1);
- DEALLOCATE_LOCAL(pboxNew1);
- }
- return;
- }
- pboxBase = pboxNext = pbox;
- while (pboxBase < pbox+nbox)
- {
- while ((pboxNext < pbox+nbox) &&
- (pboxNext->y1 == pboxBase->y1))
- pboxNext++;
- pboxTmp = pboxNext;
- pptTmp = pptSrc + (pboxTmp - pbox);
- while (pboxTmp != pboxBase)
- {
- *pboxNew2++ = *--pboxTmp;
- *pptNew2++ = *--pptTmp;
- }
- pboxBase = pboxNext;
- }
- pboxNew2 -= nbox;
- pbox = pboxNew2;
- pptNew2 -= nbox;
- pptSrc = pptNew2;
- }
- }
- else
- {
- /* walk source left to right */
- xdir = 1;
- }
-
-
- /* special case copy */
- if (alu == GXcopy)
- {
- register unsigned int bits;
- register unsigned int bits1;
- int xoffSrc, xoffDst;
- int leftShift, rightShift;
-
- while(nbox--)
- {
- w = pbox->x2 - pbox->x1;
- h = pbox->y2 - pbox->y1;
-
- if (ydir == -1) /* start at last scanline of rectangle */
- {
- psrcLine = psrcBase + ((pptSrc->y+h-1) * -widthSrc);
- pdstLine = pdstBase + ((pbox->y2-1) * -widthDst);
- }
- else /* start at first scanline */
- {
- psrcLine = psrcBase + (pptSrc->y * widthSrc);
- pdstLine = pdstBase + (pbox->y1 * widthDst);
- }
- if ((pbox->x1 & 0x1f) + w <= 32)
- {
- pdst = pdstLine + (pbox->x1 >> 5);
- psrc = psrcLine + (pptSrc->x >> 5);
- xoffSrc = pptSrc->x & 0x1f;
- xoffDst = pbox->x1 & 0x1f;
- while (h--)
- {
- getandputbits(psrc, xoffSrc, xoffDst, w, pdst);
- psrc += widthSrc;
- pdst += widthDst;
- }
- }
- else
- {
- maskbits(pbox->x1, w, startmask, endmask, nlMiddle);
- if (xdir == 1)
- {
- xoffSrc = pptSrc->x & 0x1f;
- xoffDst = pbox->x1 & 0x1f;
- pdstLine += (pbox->x1 >> 5);
- psrcLine += (pptSrc->x >> 5);
- if (xoffSrc == xoffDst)
- {
- while (h--)
- {
- psrc = psrcLine;
- pdst = pdstLine;
- pdstLine += widthDst;
- psrcLine += widthSrc;
- if (startmask)
- {
- *pdst = (*pdst & ~startmask) | (*psrc++ & startmask);
- pdst++;
- }
- nl = nlMiddle;
-
- #ifdef LARGE_INSTRUCTION_CACHE
- #ifdef FAST_CONSTANT_OFFSET_MODE
-
- psrc += nl & (UNROLL-1);
- pdst += nl & (UNROLL-1);
-
- #define BodyOdd(n) pdst[-n] = psrc[-n];
- #define BodyEven(n) pdst[-n] = psrc[-n];
-
- #define LoopReset \
- pdst += UNROLL; \
- psrc += UNROLL;
-
- #else
-
- #define BodyOdd(n) *pdst++ = *psrc++;
- #define BodyEven(n) BodyOdd(n)
-
- #define LoopReset ;
-
- #endif
- PackedLoop
-
- #undef BodyOdd
- #undef BodyEven
- #undef LoopReset
-
- #else
- DuffL(nl, label1, *pdst++ = *psrc++;)
- #endif
- if (endmask)
- *pdst = (*pdst & ~endmask) | (*psrc++ & endmask);
- }
- }
- else
- {
- if (xoffSrc > xoffDst)
- {
- leftShift = (xoffSrc - xoffDst);
- rightShift = 32 - leftShift;
- }
- else
- {
- rightShift = (xoffDst - xoffSrc);
- leftShift = 32 - rightShift;
- }
- while (h--)
- {
- psrc = psrcLine;
- pdst = pdstLine;
- pdstLine += widthDst;
- psrcLine += widthSrc;
- bits = 0;
- if (xoffSrc > xoffDst)
- bits = *psrc++;
- if (startmask)
- {
- bits1 = SCRLEFT(bits,leftShift);
- bits = *psrc++;
- bits1 |= SCRRIGHT(bits,rightShift);
- *pdst = (*pdst & ~startmask) |
- (bits1 & startmask);
- pdst++;
- }
- nl = nlMiddle;
-
- #ifdef LARGE_INSTRUCTION_CACHE
- bits1 = bits;
- #ifdef FAST_CONSTANT_OFFSET_MODE
-
- psrc += nl & (UNROLL-1);
- pdst += nl & (UNROLL-1);
-
- #define BodyOdd(n) \
- bits = psrc[-n]; \
- pdst[-n] = BitLeft(bits1, leftShift) | BitRight(bits, rightShift);
-
- #define BodyEven(n) \
- bits1 = psrc[-n]; \
- pdst[-n] = BitLeft(bits, leftShift) | BitRight(bits1, rightShift);
-
- #define LoopReset \
- pdst += UNROLL; \
- psrc += UNROLL;
-
- #else
-
- #define BodyOdd(n) \
- bits = *psrc++; \
- *pdst++ = BitLeft(bits1, leftShift) | BitRight(bits, rightShift);
-
- #define BodyEven(n) \
- bits1 = *psrc++; \
- *pdst++ = BitLeft(bits, leftShift) | BitRight(bits1, rightShift);
-
- #define LoopReset ;
-
- #endif /* !FAST_CONSTANT_OFFSET_MODE */
-
- PackedLoop
-
- #undef BodyOdd
- #undef BodyEven
- #undef LoopReset
-
- #else
- DuffL (nl,label2,
- bits1 = BitLeft(bits, leftShift);
- bits = *psrc++;
- *pdst++ = bits1 | BitRight(bits, rightShift);
- )
- #endif
- if (endmask)
- {
- bits1 = SCRLEFT(bits, leftShift);
- if (SCRLEFT(endmask, rightShift))
- {
- bits = *psrc++;
- bits1 |= SCRRIGHT(bits, rightShift);
- }
- *pdst = (*pdst & ~endmask) |
- (bits1 & endmask);
- }
- }
- }
- }
- else /* xdir == -1 */
- {
- xoffSrc = (pptSrc->x + w - 1) & 0x1f;
- xoffDst = (pbox->x2 - 1) & 0x1f;
- pdstLine += ((pbox->x2-1) >> 5) + 1;
- psrcLine += ((pptSrc->x+w - 1) >> 5) + 1;
- if (xoffSrc == xoffDst)
- {
- while (h--)
- {
- psrc = psrcLine;
- pdst = pdstLine;
- pdstLine += widthDst;
- psrcLine += widthSrc;
- if (endmask)
- {
- pdst--;
- *pdst = (*pdst & ~endmask) | (*--psrc & endmask);
- }
- nl = nlMiddle;
-
- #ifdef LARGE_INSTRUCTION_CACHE
- #ifdef FAST_CONSTANT_OFFSET_MODE
- psrc -= nl & (UNROLL - 1);
- pdst -= nl & (UNROLL - 1);
-
- #define BodyOdd(n) pdst[n-1] = psrc[n-1];
-
- #define BodyEven(n) pdst[n-1] = psrc[n-1];
-
- #define LoopReset \
- pdst -= UNROLL;\
- psrc -= UNROLL;
-
- #else
-
- #define BodyOdd(n) *--pdst = *--psrc;
- #define BodyEven(n) BodyOdd(n)
- #define LoopReset ;
-
- #endif
- PackedLoop
-
- #undef BodyOdd
- #undef BodyEven
- #undef LoopReset
-
- #else
- DuffL(nl,label3, *--pdst = *--psrc;)
- #endif
- if (startmask)
- {
- --pdst;
- *pdst = (*pdst & ~startmask) | (*--psrc & startmask);
- }
- }
- }
- else
- {
- if (xoffDst > xoffSrc)
- {
- rightShift = (xoffDst - xoffSrc);
- leftShift = 32 - rightShift;
- }
- else
- {
- leftShift = (xoffSrc - xoffDst);
- rightShift = 32 - leftShift;
- }
- while (h--)
- {
- psrc = psrcLine;
- pdst = pdstLine;
- pdstLine += widthDst;
- psrcLine += widthSrc;
- bits = 0;
- if (xoffDst > xoffSrc)
- bits = *--psrc;
- if (endmask)
- {
- bits1 = SCRRIGHT(bits, rightShift);
- bits = *--psrc;
- bits1 |= SCRLEFT(bits, leftShift);
- pdst--;
- *pdst = (*pdst & ~endmask) |
- (bits1 & endmask);
- }
- nl = nlMiddle;
-
- #ifdef LARGE_INSTRUCTION_CACHE
- bits1 = bits;
- #ifdef FAST_CONSTANT_OFFSET_MODE
- psrc -= nl & (UNROLL - 1);
- pdst -= nl & (UNROLL - 1);
-
- #define BodyOdd(n) \
- bits = psrc[n-1]; \
- pdst[n-1] = BitRight(bits1, rightShift) | BitLeft(bits, leftShift);
-
- #define BodyEven(n) \
- bits1 = psrc[n-1]; \
- pdst[n-1] = BitRight(bits, rightShift) | BitLeft(bits1, leftShift);
-
- #define LoopReset \
- pdst -= UNROLL; \
- psrc -= UNROLL;
-
- #else
-
- #define BodyOdd(n) \
- bits = *--psrc; \
- *--pdst = BitRight(bits1, rightShift) | BitLeft(bits, leftShift);
-
- #define BodyEven(n) \
- bits1 = *--psrc; \
- *--pdst = BitRight(bits, rightShift) | BitLeft(bits1, leftShift);
-
- #define LoopReset ;
-
- #endif
-
- PackedLoop
-
- #undef BodyOdd
- #undef BodyEven
- #undef LoopReset
-
- #else
- DuffL (nl, label4,
- bits1 = BitRight(bits, rightShift);
- bits = *--psrc;
- *--pdst = bits1 | BitLeft(bits, leftShift);
- )
- #endif
-
- if (startmask)
- {
- bits1 = SCRRIGHT(bits, rightShift);
- if (SCRRIGHT (startmask, leftShift))
- {
- bits = *--psrc;
- bits1 |= SCRLEFT(bits, leftShift);
- }
- --pdst;
- *pdst = (*pdst & ~startmask) |
- (bits1 & startmask);
- }
- }
- }
- }
- }
- pbox++;
- pptSrc++;
- }
- }
- else /* do some rop */
- {
- while (nbox--)
- {
- w = pbox->x2 - pbox->x1;
- h = pbox->y2 - pbox->y1;
-
- if (ydir == -1) /* start at last scanline of rectangle */
- {
- psrcLine = psrcBase + ((pptSrc->y+h-1) * -widthSrc);
- pdstLine = pdstBase + ((pbox->y2-1) * -widthDst);
- }
- else /* start at first scanline */
- {
- psrcLine = psrcBase + (pptSrc->y * widthSrc);
- pdstLine = pdstBase + (pbox->y1 * widthDst);
- }
-
- /* x direction doesn't matter for < 1 longword */
- if (w <= 32)
- {
- int srcBit, dstBit; /* bit offset of src and dst */
-
- pdstLine += (pbox->x1 >> 5);
- psrcLine += (pptSrc->x >> 5);
- psrc = psrcLine;
- pdst = pdstLine;
-
- srcBit = pptSrc->x & 0x1f;
- dstBit = pbox->x1 & 0x1f;
-
- while(h--)
- {
- getandputrop(psrc, srcBit, dstBit, w, pdst, alu)
- pdst += widthDst;
- psrc += widthSrc;
- }
- }
- else
- {
- maskbits(pbox->x1, w, startmask, endmask, nlMiddle)
- if (startmask)
- nstart = 32 - (pbox->x1 & 0x1f);
- else
- nstart = 0;
- if (endmask)
- nend = pbox->x2 & 0x1f;
- else
- nend = 0;
-
- xoffSrc = ((pptSrc->x & 0x1f) + nstart) & 0x1f;
- srcStartOver = ((pptSrc->x & 0x1f) + nstart) > 31;
-
- if (xdir == 1) /* move left to right */
- {
- pdstLine += (pbox->x1 >> 5);
- psrcLine += (pptSrc->x >> 5);
-
- while (h--)
- {
- psrc = psrcLine;
- pdst = pdstLine;
-
- if (startmask)
- {
- getandputrop(psrc, (pptSrc->x & 0x1f),
- (pbox->x1 & 0x1f), nstart, pdst, alu)
- pdst++;
- if (srcStartOver)
- psrc++;
- }
-
- /* special case for aligned operations */
- if (xoffSrc == 0)
- {
- nl = nlMiddle;
- while (nl--)
- {
- DoRop (*pdst, alu, *psrc++, *pdst);
- pdst++;
- }
- }
- else
- {
- nl = nlMiddle + 1;
- while (--nl)
- {
- getunalignedword (psrc, xoffSrc, tmpSrc)
- DoRop (*pdst, alu, tmpSrc, *pdst);
- pdst++;
- psrc++;
- }
- }
-
- if (endmask)
- {
- getandputrop0(psrc, xoffSrc, nend, pdst, alu);
- }
-
- pdstLine += widthDst;
- psrcLine += widthSrc;
- }
- }
- else /* move right to left */
- {
- pdstLine += (pbox->x2 >> 5);
- psrcLine += (pptSrc->x+w >> 5);
- /* if fetch of last partial bits from source crosses
- a longword boundary, start at the previous longword
- */
- if (xoffSrc + nend >= 32)
- --psrcLine;
-
- while (h--)
- {
- psrc = psrcLine;
- pdst = pdstLine;
-
- if (endmask)
- {
- getandputrop0(psrc, xoffSrc, nend, pdst, alu);
- }
-
- nl = nlMiddle + 1;
- while (--nl)
- {
- --psrc;
- --pdst;
- getunalignedword(psrc, xoffSrc, tmpSrc)
- DoRop(*pdst, alu, tmpSrc, *pdst);
- }
-
- if (startmask)
- {
- if (srcStartOver)
- --psrc;
- --pdst;
- getandputrop(psrc, (pptSrc->x & 0x1f),
- (pbox->x1 & 0x1f), nstart, pdst, alu)
- }
-
- pdstLine += widthDst;
- psrcLine += widthSrc;
- }
- } /* move right to left */
- }
- pbox++;
- pptSrc++;
- } /* while (nbox--) */
- }
-
- /* free up stuff */
- if (pboxNew2)
- {
- DEALLOCATE_LOCAL(pptNew2);
- DEALLOCATE_LOCAL(pboxNew2);
- }
- if (pboxNew1)
- {
- DEALLOCATE_LOCAL(pptNew1);
- DEALLOCATE_LOCAL(pboxNew1);
- }
- }
-
- /*
- * Allow devices which use mfb for 1-bit pixmap support
- * to register a function for n-to-1 copy operations, instead
- * of falling back to miCopyPlane
- */
-
- static unsigned long copyPlaneGeneration;
- static int copyPlaneScreenIndex = -1;
-
- Bool
- mfbRegisterCopyPlaneProc (pScreen, proc)
- ScreenPtr pScreen;
- RegionPtr (*proc)();
- {
- if (copyPlaneGeneration != serverGeneration)
- {
- copyPlaneScreenIndex = AllocateScreenPrivateIndex();
- if (copyPlaneScreenIndex < 0)
- return FALSE;
- copyPlaneGeneration = serverGeneration;
- }
- pScreen->devPrivates[copyPlaneScreenIndex].ptr = (pointer) proc;
- return TRUE;
- }
-
- /*
- if fg == 1 and bg ==0, we can do an ordinary CopyArea.
- if fg == bg, we can do a CopyArea with alu = mfbReduceRop(alu, fg)
- if fg == 0 and bg == 1, we use the same rasterop, with
- source operand inverted.
-
- CopyArea deals with all of the graphics exposure events.
- This code depends on knowing that we can change the
- alu in the GC without having to call ValidateGC() before calling
- CopyArea().
-
- */
-
- RegionPtr
- mfbCopyPlane(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;
- RegionPtr (*copyPlane)();
-
- if (pSrcDrawable->depth != 1)
- {
- if (copyPlaneScreenIndex >= 0 &&
- (copyPlane = (RegionPtr (*)())
- pSrcDrawable->pScreen->devPrivates[copyPlaneScreenIndex].ptr)
- )
- {
- return (*copyPlane) (pSrcDrawable, pDstDrawable,
- pGC, srcx, srcy, width, height, dstx, dsty, plane);
- }
- else
- return miCopyPlane(pSrcDrawable, pDstDrawable,
- pGC, srcx, srcy, width, height, dstx, dsty, plane);
- }
- if (plane != 1)
- return NULL;
-
- if ((pGC->fgPixel == 1) && (pGC->bgPixel == 0))
- {
- prgnExposed = (*pGC->ops->CopyArea)(pSrcDrawable, pDstDrawable,
- pGC, srcx, srcy, width, height, dstx, dsty);
- }
- else if (pGC->fgPixel == pGC->bgPixel)
- {
- alu = pGC->alu;
- pGC->alu = mfbReduceRop(pGC->alu, pGC->fgPixel);
- 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 = InverseAlu[alu];
- prgnExposed = (*pGC->ops->CopyArea)(pSrcDrawable, pDstDrawable,
- pGC, srcx, srcy, width, height, dstx, dsty);
- pGC->alu = alu;
- }
- return prgnExposed;
- }
-