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+/* $XFree86: xc/programs/Xserver/mfb/mfbbitblt.c,v 1.7tsi Exp $ */
+/* 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: mfbbitblt.c,v 1.4 2001/02/09 02:05:18 xorgcvs Exp $ */
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include <X11/X.h>
+#include <X11/Xprotostr.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.
+ */
+
+
+void
+mfbDoBitblt (pSrc, pDst, alu, prgnDst, pptSrc)
+ DrawablePtr pSrc, pDst;
+ int alu;
+ RegionPtr prgnDst;
+ DDXPointPtr pptSrc;
+{
+ switch (alu)
+ {
+ case GXcopy:
+ mfbDoBitbltCopy (pSrc, pDst, alu, prgnDst, pptSrc);
+ break;
+ case GXxor:
+ mfbDoBitbltXor (pSrc, pDst, alu, prgnDst, pptSrc);
+ break;
+ case GXcopyInverted:
+ mfbDoBitbltCopyInverted (pSrc, pDst, alu, prgnDst, pptSrc);
+ break;
+ case GXor:
+ mfbDoBitbltOr (pSrc, pDst, alu, prgnDst, pptSrc);
+ break;
+ default:
+ mfbDoBitbltGeneral (pSrc, pDst, alu, prgnDst, pptSrc);
+ break;
+ }
+}
+
+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 = NULL; /* 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 */
+ void (*localDoBitBlt)(
+ DrawablePtr /*pSrc*/,
+ DrawablePtr /*pDst*/,
+ int /*alu*/,
+ RegionPtr /*prgnDst*/,
+ DDXPointPtr /*pptSrc*/);
+
+ 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);
+ }
+
+ switch (pGC->alu) {
+ case GXcopy:
+ localDoBitBlt = mfbDoBitbltCopy;
+ break;
+ case GXcopyInverted:
+ localDoBitBlt = mfbDoBitbltCopyInverted;
+ break;
+ case GXxor:
+ localDoBitBlt = mfbDoBitbltXor;
+ break;
+ case GXor:
+ localDoBitBlt = mfbDoBitbltOr;
+ break;
+ default:
+ localDoBitBlt = mfbDoBitbltGeneral;
+ break;
+ }
+
+ srcx += pSrcDrawable->x;
+ srcy += pSrcDrawable->y;
+
+ /* clip the source */
+
+ if (pSrcDrawable->type == DRAWABLE_PIXMAP)
+ {
+ if ((pSrcDrawable == pDstDrawable) &&
+ (pGC->clientClipType == CT_NONE))
+ {
+ prgnSrcClip = pGC->pCompositeClip;
+ }
+ else
+ {
+ fastClip = 1;
+ }
+ }
+ else
+ {
+ if (pGC->subWindowMode == IncludeInferiors)
+ {
+ if (!((WindowPtr) pSrcDrawable)->parent)
+ {
+ /*
+ * special case bitblt from root window in
+ * IncludeInferiors mode; just like from a pixmap
+ */
+ fastClip = 1;
+ }
+ else if ((pSrcDrawable == pDstDrawable) &&
+ (pGC->clientClipType == CT_NONE))
+ {
+ prgnSrcClip = pGC->pCompositeClip;
+ }
+ else
+ {
+ prgnSrcClip = NotClippedByChildren((WindowPtr)pSrcDrawable);
+ freeSrcClip = TRUE;
+ }
+ }
+ else
+ {
+ prgnSrcClip = &((WindowPtr)pSrcDrawable)->clipList;
+ }
+ }
+
+ fastBox.x1 = srcx;
+ fastBox.y1 = srcy;
+ fastBox.x2 = srcx + width;
+ fastBox.y2 = srcy + height;
+
+ /* Don't create a source region if we are doing a fast clip */
+ if (fastClip)
+ {
+ fastExpose = 1;
+ /*
+ * clip the source; if regions extend beyond the source size,
+ * make sure exposure events get sent
+ */
+ if (fastBox.x1 < pSrcDrawable->x)
+ {
+ fastBox.x1 = pSrcDrawable->x;
+ fastExpose = 0;
+ }
+ if (fastBox.y1 < pSrcDrawable->y)
+ {
+ fastBox.y1 = pSrcDrawable->y;
+ fastExpose = 0;
+ }
+ if (fastBox.x2 > pSrcDrawable->x + (int) pSrcDrawable->width)
+ {
+ fastBox.x2 = pSrcDrawable->x + (int) pSrcDrawable->width;
+ fastExpose = 0;
+ }
+ if (fastBox.y2 > pSrcDrawable->y + (int) pSrcDrawable->height)
+ {
+ fastBox.y2 = pSrcDrawable->y + (int) pSrcDrawable->height;
+ fastExpose = 0;
+ }
+ }
+ else
+ {
+ REGION_INIT(pGC->pScreen, &rgnDst, &fastBox, 1);
+ REGION_INTERSECT(pGC->pScreen, &rgnDst, &rgnDst, prgnSrcClip);
+ }
+
+ dstx += pDstDrawable->x;
+ dsty += pDstDrawable->y;
+
+ if (pDstDrawable->type == DRAWABLE_WINDOW)
+ {
+ if (!((WindowPtr)pDstDrawable)->realized)
+ {
+ if (!fastClip)
+ REGION_UNINIT(pGC->pScreen, &rgnDst);
+ if (freeSrcClip)
+ REGION_DESTROY(pGC->pScreen, 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 = pGC->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)
+ {
+ REGION_NULL(pGC->pScreen, &rgnDst);
+ }
+ else
+ {
+ REGION_INIT(pGC->pScreen, &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;
+ REGION_INIT(pGC->pScreen, &rgnDst, &fastBox, 1);
+ }
+ }
+ else
+ {
+ REGION_TRANSLATE(pGC->pScreen, &rgnDst, -dx, -dy);
+ }
+
+ if (!fastClip)
+ {
+ REGION_INTERSECT(pGC->pScreen, &rgnDst, &rgnDst, pGC->pCompositeClip);
+ }
+
+ /* Do bit blitting */
+ numRects = REGION_NUM_RECTS(&rgnDst);
+ if (numRects && width && height)
+ {
+ if(!(pptSrc = (DDXPointPtr)ALLOCATE_LOCAL(numRects *
+ sizeof(DDXPointRec))))
+ {
+ REGION_UNINIT(pGC->pScreen, &rgnDst);
+ if (freeSrcClip)
+ REGION_DESTROY(pGC->pScreen, 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)
+ (*localDoBitBlt) (pSrcDrawable, pDstDrawable, pGC->alu, &rgnDst, pptSrc);
+
+ DEALLOCATE_LOCAL(pptSrc);
+ }
+
+ prgnExposed = NULL;
+ if (pGC->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);
+ }
+ REGION_UNINIT(pGC->pScreen, &rgnDst);
+ if (freeSrcClip)
+ REGION_DESTROY(pGC->pScreen, prgnSrcClip);
+ return prgnExposed;
+}
+
+
+/*
+ * Devices which use mfb for 1-bit pixmap support
+ * must register a function for n-to-1 copy operations
+ */
+
+static unsigned long copyPlaneGeneration;
+static int copyPlaneScreenIndex = -1;
+
+Bool
+mfbRegisterCopyPlaneProc (pScreen, proc)
+ ScreenPtr pScreen;
+ RegionPtr (*proc)(
+ DrawablePtr /* pSrcDrawable */,
+ DrawablePtr /* pDstDrawable */,
+ GCPtr /* pGC */,
+ int /* srcx */,
+ int /* srcy */,
+ int /* width */,
+ int /* height */,
+ int /* dstx */,
+ int /* dsty */,
+ unsigned long /* bitPlane */);
+{
+ if (copyPlaneGeneration != serverGeneration)
+ {
+ copyPlaneScreenIndex = AllocateScreenPrivateIndex();
+ if (copyPlaneScreenIndex < 0)
+ return FALSE;
+ copyPlaneGeneration = serverGeneration;
+ }
+ pScreen->devPrivates[copyPlaneScreenIndex].fptr = 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)(
+ DrawablePtr /* pSrcDrawable */,
+ DrawablePtr /* pDstDrawable */,
+ GCPtr /* pGC */,
+ int /* srcx */,
+ int /* srcy */,
+ int /* width */,
+ int /* height */,
+ int /* dstx */,
+ int /* dsty */,
+ unsigned long /* bitPlane */);
+
+
+ if (pSrcDrawable->depth != 1)
+ {
+ if (copyPlaneScreenIndex >= 0 &&
+ (copyPlane =
+ pSrcDrawable->pScreen->devPrivates[copyPlaneScreenIndex].fptr)
+ )
+ {
+ return (*copyPlane) (pSrcDrawable, pDstDrawable,
+ pGC, srcx, srcy, width, height, dstx, dsty, plane);
+ }
+ else
+ {
+ FatalError ("No copyPlane proc registered for depth %d\n",
+ pSrcDrawable->depth);
+ }
+ }
+ if (plane != 1)
+ return NULL;
+
+ if ((pGC->fgPixel & 1) == 1 && (pGC->bgPixel & 1) == 0)
+ {
+ prgnExposed = (*pGC->ops->CopyArea)(pSrcDrawable, pDstDrawable,
+ pGC, srcx, srcy, width, height, dstx, dsty);
+ }
+ else if ((pGC->fgPixel & 1) == (pGC->bgPixel & 1))
+ {
+ 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;
+}
+
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