summaryrefslogtreecommitdiff
path: root/mfb/mfbsetsp.c
diff options
context:
space:
mode:
Diffstat (limited to 'mfb/mfbsetsp.c')
-rw-r--r--mfb/mfbsetsp.c277
1 files changed, 277 insertions, 0 deletions
diff --git a/mfb/mfbsetsp.c b/mfb/mfbsetsp.c
new file mode 100644
index 000000000..08578c0f7
--- /dev/null
+++ b/mfb/mfbsetsp.c
@@ -0,0 +1,277 @@
+/* Combined Purdue/PurduePlus patches, level 2.0, 1/17/89 */
+/***********************************************************
+
+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.
+
+******************************************************************/
+/* $Xorg: mfbsetsp.c,v 1.4 2001/02/09 02:05:19 xorgcvs Exp $ */
+
+#include "X.h"
+#include "Xmd.h"
+
+#include "misc.h"
+#include "regionstr.h"
+#include "gcstruct.h"
+#include "windowstr.h"
+#include "pixmapstr.h"
+#include "scrnintstr.h"
+
+#include "mfb.h"
+#include "maskbits.h"
+
+#include "servermd.h"
+
+
+/* mfbSetScanline -- copies the bits from psrc to the drawable starting at
+ * (xStart, y) and continuing to (xEnd, y). xOrigin tells us where psrc
+ * starts on the scanline. (I.e., if this scanline passes through multiple
+ * boxes, we may not want to start grabbing bits at psrc but at some offset
+ * further on.)
+ */
+mfbSetScanline(y, xOrigin, xStart, xEnd, psrc, alu, pdstBase, widthDst)
+ int y;
+ int xOrigin; /* where this scanline starts */
+ int xStart; /* first bit to use from scanline */
+ int xEnd; /* last bit to use from scanline + 1 */
+ register PixelType *psrc;
+ register int alu; /* raster op */
+ PixelType *pdstBase; /* start of the drawable */
+ int widthDst; /* width of drawable in words */
+{
+ int w; /* width of scanline in bits */
+ register PixelType *pdst; /* where to put the bits */
+ register PixelType tmpSrc; /* scratch buffer to collect bits in */
+ int dstBit; /* offset in bits from beginning of
+ * word */
+ register int nstart; /* number of bits from first partial */
+ register int nend; /* " " last partial word */
+ int offSrc;
+ PixelType startmask, endmask;
+ int nlMiddle, nl;
+
+ pdst = mfbScanline(pdstBase, xStart, y, widthDst);
+ psrc += (xStart - xOrigin) >> PWSH;
+ offSrc = (xStart - xOrigin) & PIM;
+ w = xEnd - xStart;
+ dstBit = xStart & PIM;
+
+ if (dstBit + w <= PPW)
+ {
+ getandputrop(psrc, offSrc, dstBit, w, pdst, alu)
+ }
+ else
+ {
+
+ maskbits(xStart, w, startmask, endmask, nlMiddle);
+ if (startmask)
+ nstart = PPW - dstBit;
+ else
+ nstart = 0;
+ if (endmask)
+ nend = xEnd & PIM;
+ else
+ nend = 0;
+ if (startmask)
+ {
+ getandputrop(psrc, offSrc, dstBit, nstart, pdst, alu)
+ pdst++;
+ offSrc += nstart;
+ if (offSrc > PLST)
+ {
+ psrc++;
+ offSrc -= PPW;
+ }
+ }
+ nl = nlMiddle;
+ while (nl--)
+ {
+ getbits(psrc, offSrc, PPW, tmpSrc);
+ DoRop(*pdst, alu, tmpSrc, *pdst);
+ pdst++;
+ psrc++;
+ }
+ if (endmask)
+ {
+ getandputrop0(psrc, offSrc, nend, pdst, alu);
+ }
+
+ }
+}
+
+
+
+/* SetSpans -- for each span copy pwidth[i] bits from psrc to pDrawable at
+ * ppt[i] using the raster op from the GC. If fSorted is TRUE, the scanlines
+ * are in increasing Y order.
+ * Source bit lines are server scanline padded so that they always begin
+ * on a word boundary.
+ */
+void
+mfbSetSpans(pDrawable, pGC, pcharsrc, ppt, pwidth, nspans, fSorted)
+ DrawablePtr pDrawable;
+ GCPtr pGC;
+ char *pcharsrc;
+ register DDXPointPtr ppt;
+ int *pwidth;
+ int nspans;
+ int fSorted;
+{
+ PixelType *psrc = (PixelType *)pcharsrc;
+ PixelType *pdstBase; /* start of dst bitmap */
+ int widthDst; /* width of bitmap in words */
+ register BoxPtr pbox, pboxLast, pboxTest;
+ register DDXPointPtr pptLast;
+ int alu;
+ RegionPtr prgnDst;
+ int xStart, xEnd;
+ int yMax;
+
+ alu = pGC->alu;
+ prgnDst = ((mfbPrivGC *)(pGC->devPrivates[mfbGCPrivateIndex].ptr))->pCompositeClip;
+
+ pptLast = ppt + nspans;
+
+ yMax = pDrawable->y + (int) pDrawable->height;
+ mfbGetPixelWidthAndPointer(pDrawable, widthDst, pdstBase);
+
+ pbox = REGION_RECTS(prgnDst);
+ pboxLast = pbox + REGION_NUM_RECTS(prgnDst);
+
+ if(fSorted)
+ {
+ /* scan lines sorted in ascending order. Because they are sorted, we
+ * don't have to check each scanline against each clip box. We can be
+ * sure that this scanline only has to be clipped to boxes at or after the
+ * beginning of this y-band
+ */
+ pboxTest = pbox;
+ while(ppt < pptLast)
+ {
+ pbox = pboxTest;
+ if(ppt->y >= yMax)
+ break;
+ while(pbox < pboxLast)
+ {
+ if(pbox->y1 > ppt->y)
+ {
+ /* scanline is before clip box */
+ break;
+ }
+ else if(pbox->y2 <= ppt->y)
+ {
+ /* clip box is before scanline */
+ pboxTest = ++pbox;
+ continue;
+ }
+ else if(pbox->x1 > ppt->x + *pwidth)
+ {
+ /* clip box is to right of scanline */
+ break;
+ }
+ else if(pbox->x2 <= ppt->x)
+ {
+ /* scanline is to right of clip box */
+ pbox++;
+ continue;
+ }
+
+ /* at least some of the scanline is in the current clip box */
+ xStart = max(pbox->x1, ppt->x);
+ xEnd = min(ppt->x + *pwidth, pbox->x2);
+ mfbSetScanline(ppt->y, ppt->x, xStart, xEnd, psrc, alu,
+ pdstBase, widthDst);
+ if(ppt->x + *pwidth <= pbox->x2)
+ {
+ /* End of the line, as it were */
+ break;
+ }
+ else
+ pbox++;
+ }
+ /* We've tried this line against every box; it must be outside them
+ * all. move on to the next point */
+ ppt++;
+ psrc += PixmapWidthInPadUnits(*pwidth, 1);
+ pwidth++;
+ }
+ }
+ else
+ {
+ /* scan lines not sorted. We must clip each line against all the boxes */
+ while(ppt < pptLast)
+ {
+ if(ppt->y >= 0 && ppt->y < yMax)
+ {
+
+ for(pbox = REGION_RECTS(prgnDst); pbox< pboxLast; pbox++)
+ {
+ if(pbox->y1 > ppt->y)
+ {
+ /* rest of clip region is above this scanline,
+ * skip it */
+ break;
+ }
+ if(pbox->y2 <= ppt->y)
+ {
+ /* clip box is below scanline */
+ pbox++;
+ break;
+ }
+ if(pbox->x1 <= ppt->x + *pwidth &&
+ pbox->x2 > ppt->x)
+ {
+ xStart = max(pbox->x1, ppt->x);
+ xEnd = min(pbox->x2, ppt->x + *pwidth);
+ mfbSetScanline(ppt->y, ppt->x, xStart, xEnd,
+ psrc, alu, pdstBase, widthDst);
+ }
+
+ }
+ }
+ psrc += PixmapWidthInPadUnits(*pwidth, 1);
+ ppt++;
+ pwidth++;
+ }
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 03:22:13 +0000