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- /*
- * $XConsortium: cfb8cppl.c,v 1.5 91/08/22 15:41:05 keith Exp $
- *
- * Copyright 1990 Massachusetts Institute of Technology
- *
- * Permission to use, copy, modify, distribute, and sell this software and its
- * documentation for any purpose is hereby granted without fee, 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 M.I.T. not be used in advertising or
- * publicity pertaining to distribution of the software without specific,
- * written prior permission. M.I.T. makes no representations about the
- * suitability of this software for any purpose. It is provided "as is"
- * without express or implied warranty.
- *
- * M.I.T. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL M.I.T.
- * 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.
- *
- * Author: Keith Packard, MIT X Consortium
- */
-
- /*
- * this is actually an mfb-specific function, except that
- * it knows how to read from 8-bit cfb pixmaps. Alas, this
- * means that it doesn't know PPW so it is always compiled
- */
-
- #include "X.h"
- #include "Xmd.h"
- #include "gcstruct.h"
- #include "window.h"
- #include "pixmapstr.h"
- #include "scrnintstr.h"
- #include "windowstr.h"
- #include "cfb.h"
- #include "maskbits.h"
-
- #include "mergerop.h"
-
- #if BITMAP_BIT_ORDER == MSBFirst
- #define LeftMost 31
- #define StepBit(bit, inc) ((bit) -= (inc))
- #else
- #define LeftMost 0
- #define StepBit(bit, inc) ((bit) += (inc))
- #endif
-
- #define GetBits(psrc, nBits, curBit, bitPos, bits) {\
- bits = 0; \
- while (nBits--) \
- { \
- bits |= ((*psrc++ >> bitPos) & 1) << curBit; \
- StepBit (curBit, 1); \
- } \
- }
-
- cfbCopyImagePlane (pSrcDrawable, pDstDrawable, rop, prgnDst, pptSrc, planemask)
- DrawablePtr pSrcDrawable;
- DrawablePtr pDstDrawable;
- int rop;
- unsigned long planemask;
- RegionPtr prgnDst;
- DDXPointPtr pptSrc;
- {
- cfbCopyPlane8to1 (pSrcDrawable, pDstDrawable, rop, prgnDst, pptSrc,
- (unsigned long) ~0L, planemask);
- }
-
- cfbCopyPlane8to1 (pSrcDrawable, pDstDrawable, rop, prgnDst, pptSrc, planemask, bitPlane)
- DrawablePtr pSrcDrawable;
- DrawablePtr pDstDrawable;
- int rop;
- RegionPtr prgnDst;
- DDXPointPtr pptSrc;
- unsigned long planemask;
- unsigned long bitPlane;
- {
- int srcx, srcy, dstx, dsty, width, height;
- unsigned char *psrcBase;
- unsigned long *pdstBase;
- int widthSrc, widthDst;
- unsigned char *psrcLine;
- unsigned long *pdstLine;
- register unsigned char *psrc;
- register int i;
- register int curBit;
- register int bitPos;
- register unsigned long bits;
- register unsigned long *pdst;
- unsigned long startmask, endmask;
- int niStart, niEnd;
- int bitStart, bitEnd;
- int nl, nlMiddle;
- int nbox;
- BoxPtr pbox;
- MROP_DECLARE()
-
- if (!(planemask & 1))
- return;
-
- if (rop != GXcopy)
- MROP_INITIALIZE (rop, planemask);
-
- cfbGetByteWidthAndPointer (pSrcDrawable, widthSrc, psrcBase)
-
- mfbGetLongWidthAndPointer (pDstDrawable, widthDst, pdstBase)
-
- bitPos = ffs (bitPlane) - 1;
-
- nbox = REGION_NUM_RECTS(prgnDst);
- pbox = REGION_RECTS(prgnDst);
- while (nbox--)
- {
- dstx = pbox->x1;
- dsty = pbox->y1;
- srcx = pptSrc->x;
- srcy = pptSrc->y;
- width = pbox->x2 - pbox->x1;
- height = pbox->y2 - pbox->y1;
- pbox++;
- pptSrc++;
- psrcLine = psrcBase + srcy * widthSrc + srcx;
- pdstLine = pdstBase + dsty * widthDst + (dstx >> 5);
- dstx &= 0x1f;
- if (dstx + width <= 32)
- {
- maskpartialbits(dstx, width, startmask);
- nlMiddle = 0;
- endmask = 0;
- }
- else
- {
- maskbits (dstx, width, startmask, endmask, nlMiddle);
- }
- if (startmask)
- {
- niStart = 32 - dstx;
- bitStart = LeftMost;
- StepBit (bitStart, dstx);
- }
- if (endmask)
- {
- niEnd = (dstx + width) & 0x1f;
- bitEnd = LeftMost;
- }
- if (rop == GXcopy)
- {
- while (height--)
- {
- psrc = psrcLine;
- pdst = pdstLine;
- psrcLine += widthSrc;
- pdstLine += widthDst;
- if (startmask)
- {
- i = niStart;
- curBit = bitStart;
- GetBits (psrc, i, curBit, bitPos, bits);
- *pdst = *pdst & ~startmask | bits;
- pdst++;
- }
- nl = nlMiddle;
- while (nl--)
- {
- i = 32;
- curBit = LeftMost;
- GetBits (psrc, i, curBit, bitPos, bits);
- *pdst++ = bits;
- }
- if (endmask)
- {
- i = niEnd;
- curBit = bitEnd;
- GetBits (psrc, i, curBit, bitPos, bits);
- *pdst = *pdst & ~endmask | bits;
- }
- }
- }
- else
- {
- while (height--)
- {
- psrc = psrcLine;
- pdst = pdstLine;
- psrcLine += widthSrc;
- pdstLine += widthDst;
- if (startmask)
- {
- i = niStart;
- curBit = bitStart;
- GetBits (psrc, i, curBit, bitPos, bits);
- *pdst = MROP_MASK(bits, *pdst, startmask);
- pdst++;
- }
- nl = nlMiddle;
- while (nl--)
- {
- i = 32;
- curBit = LeftMost;
- GetBits (psrc, i, curBit, bitPos, bits);
- *pdst = MROP_SOLID(bits, *pdst);
- pdst++;
- }
- if (endmask)
- {
- i = niEnd;
- curBit = bitEnd;
- GetBits (psrc, i, curBit, bitPos, bits);
- *pdst = MROP_MASK (bits, *pdst, endmask);
- }
- }
- }
- }
- }
-