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Diffstat (limited to 'xorg-server/cfb/cfbgetsp.c')
-rw-r--r--xorg-server/cfb/cfbgetsp.c213
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diff --git a/xorg-server/cfb/cfbgetsp.c b/xorg-server/cfb/cfbgetsp.c
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+++ b/xorg-server/cfb/cfbgetsp.c
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+/***********************************************************
+
+Copyright 1987, 1998 The Open Group
+
+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.
+
+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
+OPEN GROUP 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 Open Group 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 Open Group.
+
+
+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.
+
+******************************************************************/
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include <X11/X.h>
+#include <X11/Xmd.h>
+#include "servermd.h"
+
+#include "misc.h"
+#include "region.h"
+#include "gc.h"
+#include "windowstr.h"
+#include "pixmapstr.h"
+#include "scrnintstr.h"
+
+#include "cfb.h"
+#include "cfbmskbits.h"
+
+/* GetSpans -- for each span, gets bits from drawable starting at ppt[i]
+ * and continuing for pwidth[i] bits
+ * Each scanline returned will be server scanline padded, i.e., it will come
+ * out to an integral number of words.
+ */
+void
+cfbGetSpans(pDrawable, wMax, ppt, pwidth, nspans, pchardstStart)
+ DrawablePtr pDrawable; /* drawable from which to get bits */
+ int wMax; /* largest value of all *pwidths */
+ register DDXPointPtr ppt; /* points to start copying from */
+ int *pwidth; /* list of number of bits to copy */
+ int nspans; /* number of scanlines to copy */
+ char *pchardstStart; /* where to put the bits */
+{
+ PixelGroup *pdstStart = (PixelGroup *)pchardstStart;
+ register PixelGroup *pdst; /* where to put the bits */
+ register PixelGroup *psrc; /* where to get the bits */
+ register PixelGroup tmpSrc; /* scratch buffer for bits */
+ PixelGroup *psrcBase; /* start of src bitmap */
+ int widthSrc; /* width of pixmap in bytes */
+ register DDXPointPtr pptLast; /* one past last point to get */
+ int xEnd; /* last pixel to copy from */
+ int nl, srcBit;
+ int w;
+ PixelGroup *pdstNext;
+#if PSZ == 24
+ register char *psrcb, *pdstb;
+ register int xIndex = 0;
+#else
+ register int nstart;
+#if PSZ != 32 || PPW != 1
+ int nend;
+#endif
+ PixelGroup startmask, endmask;
+ int nlMiddle;
+#endif
+
+ switch (pDrawable->bitsPerPixel) {
+ case 1:
+ mfbGetSpans(pDrawable, wMax, ppt, pwidth, nspans, pchardstStart);
+ return;
+ case PSZ:
+ break;
+ default:
+ FatalError("cfbGetSpans: invalid depth\n");
+ }
+
+ /*
+ * XFree86 DDX empties the root borderClip when the VT is
+ * switched away; this checks for that case
+ */
+ if (!cfbDrawableEnabled(pDrawable))
+ return;
+
+ cfbGetLongWidthAndPointer (pDrawable, widthSrc, psrcBase)
+
+#ifdef PIXEL_ADDR
+# if PSZ != 24
+ if ((nspans == 1) && (*pwidth == 1))
+ {
+ tmpSrc = *((PixelType *)(psrcBase + (ppt->y * widthSrc))
+ + ppt->x);
+#if BITMAP_BIT_ORDER == MSBFirst
+ tmpSrc <<= (sizeof (CfbBits) - sizeof (PixelType)) * 8;
+#endif
+ *pdstStart = tmpSrc;
+ return;
+ }
+# endif /* PSZ != 24 */
+#endif
+ pdst = pdstStart;
+ pptLast = ppt + nspans;
+ while(ppt < pptLast)
+ {
+#if PSZ == 24
+ xEnd = min(ppt->x + *pwidth, widthSrc * sizeof(CfbBits) / 3);
+ w = xEnd - ppt->x;
+ psrc = psrcBase + ppt->y * widthSrc;
+ srcBit = ppt->x;
+ psrcb = (char *)psrc + (ppt->x * 3);
+ xIndex = 0;
+ pdstb = (char *)pdst;
+ pdstNext = pdst + ((w * 3 + 3) >> 2);
+#else
+ xEnd = min(ppt->x + *pwidth, widthSrc << PWSH);
+ w = xEnd - ppt->x;
+ psrc = psrcBase + ppt->y * widthSrc + (ppt->x >> PWSH);
+ srcBit = ppt->x & PIM;
+ pdstNext = pdst + ((w + PPW - 1) >> PWSH);
+#endif
+
+#if PSZ == 24
+ if (w < 0)
+ FatalError("cfb24GetSpans: Internal error (w < 0)\n");
+ nl = w;
+ while (nl--){
+ psrc = (PixelGroup *)((unsigned long)psrcb & ~0x03);
+ getbits24(psrc, tmpSrc, srcBit);
+ pdst = (PixelGroup *)((unsigned long)pdstb & ~0x03);
+ putbits24(tmpSrc, PPW, pdst, ~((CfbBits)0), xIndex);
+ srcBit++;
+ psrcb += 3;
+ xIndex++;
+ pdstb += 3;
+ }
+ pdst = pdstNext;
+#else /* PSZ == 24 */
+ if (srcBit + w <= PPW)
+ {
+ getbits(psrc, srcBit, w, tmpSrc);
+ putbits(tmpSrc, 0, w, pdst, ~((CfbBits)0));
+ pdst++;
+ }
+ else
+ {
+ maskbits(ppt->x, w, startmask, endmask, nlMiddle);
+ nstart = 0;
+ if (startmask)
+ {
+ nstart = PPW - srcBit;
+ getbits(psrc, srcBit, nstart, tmpSrc);
+ putbits(tmpSrc, 0, nstart, pdst, ~((CfbBits)0));
+ if(srcBit + nstart >= PPW)
+ psrc++;
+ }
+ nl = nlMiddle;
+ while (nl--)
+ {
+ tmpSrc = *psrc;
+ putbits(tmpSrc, nstart, PPW, pdst, ~((CfbBits)0));
+ psrc++;
+ pdst++;
+ }
+ if (endmask)
+ {
+#if PSZ != 32 || PPW != 1
+ nend = xEnd & PIM;
+#endif
+ getbits(psrc, 0, nend, tmpSrc);
+ putbits(tmpSrc, nstart, nend, pdst, ~((CfbBits)0));
+ }
+ pdst = pdstNext;
+ }
+#endif /* PSZ == 24 */
+ ppt++;
+ pwidth++;
+ }
+}
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