--- /dev/null
+/* $XConsortium: mibstore.c,v 5.63 94/10/21 20:25:08 dpw Exp $ */
+/***********************************************************
+
+Copyright (c) 1987 X Consortium
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+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
+X CONSORTIUM 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 X Consortium 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 X Consortium.
+
+
+Copyright 1987 by the Regents of the University of California
+
+ 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 X Consortium not be used in advertising or publicity
+pertaining to distribution of the software without specific, written prior
+permission.
+
+The University of California makes no representations about the suitability
+of this software for any purpose. It is provided "as is" without express or
+implied warranty.
+
+******************************************************************/
+
+#define NEED_EVENTS
+#include "X.h"
+#include "Xmd.h"
+#include "Xproto.h"
+#include "misc.h"
+#include "regionstr.h"
+#include "scrnintstr.h"
+#include "gcstruct.h"
+#include "extnsionst.h"
+#include "windowstr.h"
+#include "pixmapstr.h"
+#include "fontstruct.h"
+#include "dixfontstr.h"
+#include "dixstruct.h" /* For requestingClient */
+#include "mi.h"
+#include "mibstorest.h"
+
+/*
+ * When the server fails to allocate a backing store pixmap, if you want
+ * it to dynamically retry to allocate backing store on every subsequent
+ * graphics op, you can enable BSEAGER; otherwise, backing store will be
+ * disabled on the window until it is unmapped and then remapped.
+ */
+/* #define BSEAGER */
+
+/*-
+ * NOTES ON USAGE:
+ *
+ * The functions in this file implement a machine-independent backing-store
+ * scheme. To use it, the output library must do the following:
+ * - Provide a SaveAreas function that takes a destination pixmap, a
+ * region of the areas to save (in the pixmap's coordinate system)
+ * and the screen origin of the region. It should copy the areas from
+ * the screen into the pixmap.
+ * - Provide a RestoreAreas function that takes a source pixmap, a region
+ * of the areas to restore (in the screen's coordinate system) and the
+ * origin of the pixmap on the screen. It should copy the areas from
+ * the pixmap into the screen.
+ * - Provide a SetClipmaskRgn function that takes a gc and a region
+ * and merges the region into any CT_PIXMAP client clip that
+ * is specified in the GC. This routine is only needed if
+ * miValidateBackingStore will see CT_PIXMAP clip lists; not
+ * true for any of the sample servers (which convert the PIXMAP
+ * clip lists into CT_REGION clip lists; an expensive but simple
+ * to code option).
+ * - The function placed in a window's ClearToBackground vector must call
+ * pScreen->ClearBackingStore with the window, followed by
+ * the window-relative x and y coordinates, followed by the width and
+ * height of the area to be cleared, followed by the generateExposures
+ * flag. This has been taken care of in miClearToBackground.
+ * - Whatever determines GraphicsExpose events for the CopyArea and
+ * CopyPlane requests should call pWin->backStorage->ExposeCopy
+ * with the source and destination drawables, the GC used, a source-
+ * window-relative region of exposed areas, the source and destination
+ * coordinates and the bitplane copied, if CopyPlane, or 0, if
+ * CopyArea.
+ *
+ * JUSTIFICATION
+ * This is a cross between saving everything and just saving the
+ * obscued areas (as in Pike's layers.) This method has the advantage
+ * of only doing each output operation once per pixel, visible or
+ * invisible, and avoids having to do all the crufty storage
+ * management of keeping several separate rectangles. Since the
+ * ddx layer ouput primitives are required to draw through clipping
+ * rectangles anyway, sending multiple drawing requests for each of
+ * several rectangles isn't necessary. (Of course, it could be argued
+ * that the ddx routines should just take one rectangle each and
+ * get called multiple times, but that would make taking advantage of
+ * smart hardware harder, and probably be slower as well.)
+ */
+
+#define SETUP_BACKING_TERSE(pGC) \
+ miBSGCPtr pGCPrivate = (miBSGCPtr)(pGC)->devPrivates[miBSGCIndex].ptr; \
+ GCFuncs *oldFuncs = pGC->funcs;
+
+#define SETUP_BACKING(pDrawable,pGC) \
+ miBSWindowPtr pBackingStore = \
+ (miBSWindowPtr)((WindowPtr)(pDrawable))->backStorage; \
+ DrawablePtr pBackingDrawable = (DrawablePtr) \
+ pBackingStore->pBackingPixmap; \
+ SETUP_BACKING_TERSE(pGC) \
+ GCPtr pBackingGC = pGCPrivate->pBackingGC;
+
+#define PROLOGUE(pGC) { \
+ pGC->ops = pGCPrivate->wrapOps;\
+ pGC->funcs = pGCPrivate->wrapFuncs; \
+ }
+
+#define EPILOGUE(pGC) { \
+ pGCPrivate->wrapOps = (pGC)->ops; \
+ (pGC)->ops = &miBSGCOps; \
+ (pGC)->funcs = oldFuncs; \
+ }
+
+static void miCreateBSPixmap();
+static void miDestroyBSPixmap();
+static void miTileVirtualBS();
+static void miBSAllocate(), miBSFree();
+static Bool miBSCreateGCPrivate ();
+static void miBSClearBackingRegion ();
+
+#define MoreCopy0 ;
+#define MoreCopy2 *dstCopy++ = *srcCopy++; *dstCopy++ = *srcCopy++;
+#define MoreCopy4 MoreCopy2 MoreCopy2
+
+#define copyData(src,dst,n,morecopy) \
+{ \
+ register short *srcCopy = (short *)(src); \
+ register short *dstCopy = (short *)(dst); \
+ register int i; \
+ register int bsx = pBackingStore->x; \
+ register int bsy = pBackingStore->y; \
+ for (i = n; --i >= 0; ) \
+ { \
+ *dstCopy++ = *srcCopy++ - bsx; \
+ *dstCopy++ = *srcCopy++ - bsy; \
+ morecopy \
+ } \
+}
+
+#define copyPoints(src,dst,n,mode) \
+if (mode == CoordModeOrigin) \
+{ \
+ copyData(src,dst,n,MoreCopy0); \
+} \
+else \
+{ \
+ memmove((char *)(dst), (char *)(src), (n) << 2); \
+ *((short *)(dst)) -= pBackingStore->x; \
+ *((short *)(dst) + 1) -= pBackingStore->y; \
+}
+
+/*
+ * wrappers for screen funcs
+ */
+
+static int miBSScreenIndex;
+static unsigned long miBSGeneration = 0;
+
+static Bool miBSCloseScreen();
+static void miBSGetImage();
+static void miBSGetSpans();
+static Bool miBSChangeWindowAttributes();
+static Bool miBSCreateGC();
+static Bool miBSDestroyWindow();
+
+/*
+ * backing store screen functions
+ */
+
+static void miBSSaveDoomedAreas();
+static RegionPtr miBSRestoreAreas();
+static void miBSExposeCopy();
+static RegionPtr miBSTranslateBackingStore(), miBSClearBackingStore();
+static void miBSDrawGuarantee();
+
+/*
+ * wrapper vectors for GC funcs and ops
+ */
+
+static int miBSGCIndex;
+
+static void miBSValidateGC (), miBSCopyGC (), miBSDestroyGC();
+static void miBSChangeGC();
+static void miBSChangeClip(), miBSDestroyClip(), miBSCopyClip();
+
+static GCFuncs miBSGCFuncs = {
+ miBSValidateGC,
+ miBSChangeGC,
+ miBSCopyGC,
+ miBSDestroyGC,
+ miBSChangeClip,
+ miBSDestroyClip,
+ miBSCopyClip,
+};
+
+static void miBSFillSpans(), miBSSetSpans(), miBSPutImage();
+static RegionPtr miBSCopyArea(), miBSCopyPlane();
+static void miBSPolyPoint(), miBSPolylines(), miBSPolySegment();
+static void miBSPolyRectangle(),miBSPolyArc(), miBSFillPolygon();
+static void miBSPolyFillRect(), miBSPolyFillArc();
+static int miBSPolyText8(), miBSPolyText16();
+static void miBSImageText8(), miBSImageText16();
+static void miBSImageGlyphBlt(),miBSPolyGlyphBlt();
+static void miBSPushPixels();
+#ifdef NEED_LINEHELPER
+static void miBSLineHelper();
+#endif
+
+static GCOps miBSGCOps = {
+ miBSFillSpans, miBSSetSpans, miBSPutImage,
+ miBSCopyArea, miBSCopyPlane, miBSPolyPoint,
+ miBSPolylines, miBSPolySegment, miBSPolyRectangle,
+ miBSPolyArc, miBSFillPolygon, miBSPolyFillRect,
+ miBSPolyFillArc, miBSPolyText8, miBSPolyText16,
+ miBSImageText8, miBSImageText16, miBSImageGlyphBlt,
+ miBSPolyGlyphBlt, miBSPushPixels
+#ifdef NEED_LINEHELPER
+ , miBSLineHelper
+#endif
+};
+
+#define FUNC_PROLOGUE(pGC, pPriv) \
+ ((pGC)->funcs = pPriv->wrapFuncs),\
+ ((pGC)->ops = pPriv->wrapOps)
+
+#define FUNC_EPILOGUE(pGC, pPriv) \
+ ((pGC)->funcs = &miBSGCFuncs),\
+ ((pGC)->ops = &miBSGCOps)
+
+/*
+ * every GC in the server is initially wrapped with these
+ * "cheap" functions. This allocates no memory and is used
+ * to discover GCs used with windows which have backing
+ * store enabled
+ */
+
+static void miBSCheapValidateGC(), miBSCheapCopyGC(), miBSCheapDestroyGC();
+static void miBSCheapChangeGC ();
+static void miBSCheapChangeClip(), miBSCheapDestroyClip();
+static void miBSCheapCopyClip();
+
+static GCFuncs miBSCheapGCFuncs = {
+ miBSCheapValidateGC,
+ miBSCheapChangeGC,
+ miBSCheapCopyGC,
+ miBSCheapDestroyGC,
+ miBSCheapChangeClip,
+ miBSCheapDestroyClip,
+ miBSCheapCopyClip,
+};
+
+#define CHEAP_FUNC_PROLOGUE(pGC) \
+ ((pGC)->funcs = (GCFuncs *) (pGC)->devPrivates[miBSGCIndex].ptr)
+
+#define CHEAP_FUNC_EPILOGUE(pGC) \
+ ((pGC)->funcs = &miBSCheapGCFuncs)
+
+/*
+ * called from device screen initialization proc. Gets a GCPrivateIndex
+ * and wraps appropriate per-screen functions
+ */
+
+void
+miInitializeBackingStore (pScreen, funcs)
+ ScreenPtr pScreen;
+ miBSFuncPtr funcs;
+{
+ miBSScreenPtr pScreenPriv;
+
+ if (miBSGeneration != serverGeneration)
+ {
+ miBSScreenIndex = AllocateScreenPrivateIndex ();
+ if (miBSScreenIndex < 0)
+ return;
+ miBSGCIndex = AllocateGCPrivateIndex ();
+ miBSGeneration = serverGeneration;
+ }
+ if (!AllocateGCPrivate(pScreen, miBSGCIndex, 0))
+ return;
+ pScreenPriv = (miBSScreenPtr) xalloc (sizeof (miBSScreenRec));
+ if (!pScreenPriv)
+ return;
+
+ pScreenPriv->CloseScreen = pScreen->CloseScreen;
+ pScreenPriv->GetImage = pScreen->GetImage;
+ pScreenPriv->GetSpans = pScreen->GetSpans;
+ pScreenPriv->ChangeWindowAttributes = pScreen->ChangeWindowAttributes;
+ pScreenPriv->CreateGC = pScreen->CreateGC;
+ pScreenPriv->DestroyWindow = pScreen->DestroyWindow;
+ pScreenPriv->funcs = funcs;
+
+ pScreen->CloseScreen = miBSCloseScreen;
+ pScreen->GetImage = miBSGetImage;
+ pScreen->GetSpans = miBSGetSpans;
+ pScreen->ChangeWindowAttributes = miBSChangeWindowAttributes;
+ pScreen->CreateGC = miBSCreateGC;
+ pScreen->DestroyWindow = miBSDestroyWindow;
+
+ pScreen->SaveDoomedAreas = miBSSaveDoomedAreas;
+ pScreen->RestoreAreas = miBSRestoreAreas;
+ pScreen->ExposeCopy = miBSExposeCopy;
+ pScreen->TranslateBackingStore = miBSTranslateBackingStore;
+ pScreen->ClearBackingStore = miBSClearBackingStore;
+ pScreen->DrawGuarantee = miBSDrawGuarantee;
+
+ pScreen->devPrivates[miBSScreenIndex].ptr = (pointer) pScreenPriv;
+}
+
+/*
+ * Screen function wrappers
+ */
+
+#define SCREEN_PROLOGUE(pScreen, field)\
+ ((pScreen)->field = \
+ ((miBSScreenPtr) \
+ (pScreen)->devPrivates[miBSScreenIndex].ptr)->field)
+
+#define SCREEN_EPILOGUE(pScreen, field, wrapper)\
+ ((pScreen)->field = wrapper)
+
+/*
+ * CloseScreen wrapper -- unwrap everything, free the private data
+ * and call the wrapped function
+ */
+
+static Bool
+miBSCloseScreen (i, pScreen)
+ int i;
+ ScreenPtr pScreen;
+{
+ miBSScreenPtr pScreenPriv;
+
+ pScreenPriv = (miBSScreenPtr) pScreen->devPrivates[miBSScreenIndex].ptr;
+
+ pScreen->CloseScreen = pScreenPriv->CloseScreen;
+ pScreen->GetImage = pScreenPriv->GetImage;
+ pScreen->GetSpans = pScreenPriv->GetSpans;
+ pScreen->ChangeWindowAttributes = pScreenPriv->ChangeWindowAttributes;
+ pScreen->CreateGC = pScreenPriv->CreateGC;
+
+ xfree ((pointer) pScreenPriv);
+
+ return (*pScreen->CloseScreen) (i, pScreen);
+}
+
+static void miBSFillVirtualBits();
+
+static void
+miBSGetImage (pDrawable, sx, sy, w, h, format, planemask, pdstLine)
+ DrawablePtr pDrawable;
+ int sx, sy, w, h;
+ unsigned int format;
+ unsigned long planemask;
+ char *pdstLine;
+{
+ ScreenPtr pScreen = pDrawable->pScreen;
+ BoxRec bounds;
+ unsigned char depth;
+
+ SCREEN_PROLOGUE (pScreen, GetImage);
+
+ if (pDrawable->type != DRAWABLE_PIXMAP &&
+ ((WindowPtr) pDrawable)->visibility != VisibilityUnobscured)
+ {
+ PixmapPtr pPixmap;
+ miBSWindowPtr pWindowPriv;
+ GCPtr pGC;
+ WindowPtr pWin, pSrcWin;
+ int xoff, yoff;
+ RegionRec Remaining;
+ RegionRec Border;
+ RegionRec Inside;
+ BoxPtr pBox;
+ int n;
+
+ pWin = (WindowPtr) pDrawable;
+ pPixmap = 0;
+ depth = pDrawable->depth;
+ bounds.x1 = sx + pDrawable->x;
+ bounds.y1 = sy + pDrawable->y;
+ bounds.x2 = bounds.x1 + w;
+ bounds.y2 = bounds.y1 + h;
+ REGION_INIT(pScreen, &Remaining, &bounds, 0);
+ for (;;)
+ {
+ bounds.x1 = sx + pDrawable->x - pWin->drawable.x;
+ bounds.y1 = sy + pDrawable->y - pWin->drawable.y;
+ bounds.x2 = bounds.x1 + w;
+ bounds.y2 = bounds.y1 + h;
+ if (pWin->viewable && pWin->backStorage &&
+ pWin->drawable.depth == depth &&
+ (RECT_IN_REGION(pScreen, &(pWindowPriv =
+ (miBSWindowPtr) pWin->backStorage)->SavedRegion,
+ &bounds) != rgnOUT ||
+ RECT_IN_REGION(pScreen, &Remaining,
+ REGION_EXTENTS(pScreen, &pWin->borderSize)) != rgnOUT))
+ {
+ if (!pPixmap)
+ {
+ XID subWindowMode = IncludeInferiors;
+ int x, y;
+
+ pPixmap = (*pScreen->CreatePixmap) (pScreen, w, h, depth);
+ if (!pPixmap)
+ goto punt;
+ pGC = GetScratchGC (depth, pScreen);
+ if (!pGC)
+ {
+ (*pScreen->DestroyPixmap) (pPixmap);
+ goto punt;
+ }
+ ChangeGC (pGC, GCSubwindowMode, &subWindowMode);
+ ValidateGC ((DrawablePtr)pPixmap, pGC);
+ REGION_INIT(pScreen, &Border, NullBox, 0);
+ REGION_INIT(pScreen, &Inside, NullBox, 0);
+ pSrcWin = (WindowPtr) pDrawable;
+ x = sx;
+ y = sy;
+ if (pSrcWin->parent)
+ {
+ x += pSrcWin->origin.x;
+ y += pSrcWin->origin.y;
+ pSrcWin = pSrcWin->parent;
+ }
+ (*pGC->ops->CopyArea) ((DrawablePtr)pSrcWin,
+ (DrawablePtr)pPixmap, pGC,
+ x, y, w, h,
+ 0, 0);
+ REGION_SUBTRACT(pScreen, &Remaining, &Remaining,
+ &((WindowPtr) pDrawable)->borderClip);
+ }
+
+ REGION_INTERSECT(pScreen, &Inside, &Remaining, &pWin->winSize);
+ REGION_TRANSLATE(pScreen, &Inside,
+ -pWin->drawable.x,
+ -pWin->drawable.y);
+ REGION_INTERSECT(pScreen, &Inside, &Inside,
+ &pWindowPriv->SavedRegion);
+
+ /* offset of sub-window in GetImage pixmap */
+ xoff = pWin->drawable.x - pDrawable->x - sx;
+ yoff = pWin->drawable.y - pDrawable->y - sy;
+
+ if (REGION_NUM_RECTS(&Inside) > 0)
+ {
+ switch (pWindowPriv->status)
+ {
+ case StatusContents:
+ pBox = REGION_RECTS(&Inside);
+ for (n = REGION_NUM_RECTS(&Inside); --n >= 0;)
+ {
+ (*pGC->ops->CopyArea) (
+ (DrawablePtr)pWindowPriv->pBackingPixmap,
+ (DrawablePtr)pPixmap, pGC,
+ pBox->x1 - pWindowPriv->x,
+ pBox->y1 - pWindowPriv->y,
+ pBox->x2 - pBox->x1,
+ pBox->y2 - pBox->y1,
+ pBox->x1 + xoff,
+ pBox->y1 + yoff);
+ ++pBox;
+ }
+ break;
+ case StatusVirtual:
+ case StatusVDirty:
+ if (pWindowPriv->backgroundState == BackgroundPixmap ||
+ pWindowPriv->backgroundState == BackgroundPixel)
+ miBSFillVirtualBits ((DrawablePtr) pPixmap, pGC, &Inside,
+ xoff, yoff,
+ (int) pWindowPriv->backgroundState,
+ pWindowPriv->background, ~0L);
+ break;
+ }
+ }
+ REGION_SUBTRACT(pScreen, &Border, &pWin->borderSize,
+ &pWin->winSize);
+ REGION_INTERSECT(pScreen, &Border, &Border, &Remaining);
+ if (REGION_NUM_RECTS(&Border) > 0)
+ {
+ REGION_TRANSLATE(pScreen, &Border, -pWin->drawable.x,
+ -pWin->drawable.y);
+ miBSFillVirtualBits ((DrawablePtr) pPixmap, pGC, &Border,
+ xoff, yoff,
+ pWin->borderIsPixel ? (int)BackgroundPixel : (int)BackgroundPixmap,
+ pWin->border, ~0L);
+ }
+ }
+
+ if (pWin->viewable && pWin->firstChild)
+ pWin = pWin->firstChild;
+ else
+ {
+ while (!pWin->nextSib && pWin != (WindowPtr) pDrawable)
+ pWin = pWin->parent;
+ if (pWin == (WindowPtr) pDrawable)
+ break;
+ pWin = pWin->nextSib;
+ }
+ }
+
+ REGION_UNINIT(pScreen, &Remaining);
+
+ if (pPixmap)
+ {
+ REGION_UNINIT(pScreen, &Border);
+ REGION_UNINIT(pScreen, &Inside);
+ (*pScreen->GetImage) ((DrawablePtr) pPixmap,
+ 0, 0, w, h, format, planemask, pdstLine);
+ (*pScreen->DestroyPixmap) (pPixmap);
+ FreeScratchGC (pGC);
+ }
+ else
+ {
+ goto punt;
+ }
+ }
+ else
+ {
+punt: ;
+ (*pScreen->GetImage) (pDrawable, sx, sy, w, h,
+ format, planemask, pdstLine);
+ }
+
+ SCREEN_EPILOGUE (pScreen, GetImage, miBSGetImage);
+}
+
+static void
+miBSGetSpans (pDrawable, wMax, ppt, pwidth, nspans, pdstStart)
+ DrawablePtr pDrawable;
+ int wMax;
+ DDXPointPtr ppt;
+ int *pwidth;
+ int nspans;
+ char *pdstStart;
+{
+ ScreenPtr pScreen = pDrawable->pScreen;
+ BoxRec bounds;
+ int i;
+ WindowPtr pWin;
+ int dx, dy;
+
+ SCREEN_PROLOGUE (pScreen, GetSpans);
+
+ if (pDrawable->type != DRAWABLE_PIXMAP && ((WindowPtr) pDrawable)->backStorage)
+ {
+ PixmapPtr pPixmap;
+ miBSWindowPtr pWindowPriv;
+ GCPtr pGC;
+
+ pWin = (WindowPtr) pDrawable;
+ pWindowPriv = (miBSWindowPtr) pWin->backStorage;
+ pPixmap = pWindowPriv->pBackingPixmap;
+
+ bounds.x1 = ppt->x;
+ bounds.y1 = ppt->y;
+ bounds.x2 = bounds.x1 + *pwidth;
+ bounds.y2 = ppt->y;
+ for (i = 0; i < nspans; i++)
+ {
+ if (ppt[i].x < bounds.x1)
+ bounds.x1 = ppt[i].x;
+ if (ppt[i].x + pwidth[i] > bounds.x2)
+ bounds.x2 = ppt[i].x + pwidth[i];
+ if (ppt[i].y < bounds.y1)
+ bounds.y1 = ppt[i].y;
+ else if (ppt[i].y > bounds.y2)
+ bounds.y2 = ppt[i].y;
+ }
+
+ switch (RECT_IN_REGION(pScreen, &pWindowPriv->SavedRegion, &bounds))
+ {
+ case rgnPART:
+ if (!pPixmap)
+ {
+ miCreateBSPixmap (pWin, NullBox);
+ if (!(pPixmap = pWindowPriv->pBackingPixmap))
+ break;
+ }
+ pWindowPriv->status = StatusNoPixmap;
+ pGC = GetScratchGC(pPixmap->drawable.depth,
+ pPixmap->drawable.pScreen);
+ if (pGC)
+ {
+ ValidateGC ((DrawablePtr) pPixmap, pGC);
+ (*pGC->ops->CopyArea)
+ (pDrawable, (DrawablePtr) pPixmap, pGC,
+ bounds.x1, bounds.y1,
+ bounds.x2 - bounds.x1, bounds.y2 - bounds.y1,
+ bounds.x1 + pPixmap->drawable.x - pWin->drawable.x -
+ pWindowPriv->x,
+ bounds.y1 + pPixmap->drawable.y - pWin->drawable.y -
+ pWindowPriv->y);
+ FreeScratchGC(pGC);
+ }
+ pWindowPriv->status = StatusContents;
+ /* fall through */
+ case rgnIN:
+ if (!pPixmap)
+ {
+ miCreateBSPixmap (pWin, NullBox);
+ if (!(pPixmap = pWindowPriv->pBackingPixmap))
+ break;
+ }
+ dx = pPixmap->drawable.x - pWin->drawable.x - pWindowPriv->x;
+ dy = pPixmap->drawable.y - pWin->drawable.y - pWindowPriv->y;
+ for (i = 0; i < nspans; i++)
+ {
+ ppt[i].x += dx;
+ ppt[i].y += dy;
+ }
+ (*pScreen->GetSpans) ((DrawablePtr) pPixmap, wMax, ppt, pwidth,
+ nspans, pdstStart);
+ break;
+ case rgnOUT:
+ (*pScreen->GetSpans) (pDrawable, wMax, ppt, pwidth, nspans,
+ pdstStart);
+ break;
+ }
+ }
+ else
+ {
+ (*pScreen->GetSpans) (pDrawable, wMax, ppt, pwidth, nspans, pdstStart);
+ }
+
+ SCREEN_EPILOGUE (pScreen, GetSpans, miBSGetSpans);
+}
+
+static Bool
+miBSChangeWindowAttributes (pWin, mask)
+ WindowPtr pWin;
+ unsigned long mask;
+{
+ ScreenPtr pScreen;
+ Bool ret;
+
+ pScreen = pWin->drawable.pScreen;
+
+ SCREEN_PROLOGUE (pScreen, ChangeWindowAttributes);
+
+ ret = (*pScreen->ChangeWindowAttributes) (pWin, mask);
+
+ if (ret && (mask & CWBackingStore))
+ {
+ if (pWin->backingStore != NotUseful || pWin->DIXsaveUnder)
+ miBSAllocate (pWin);
+ else
+ miBSFree (pWin);
+ }
+
+ SCREEN_EPILOGUE (pScreen, ChangeWindowAttributes, miBSChangeWindowAttributes);
+
+ return ret;
+}
+
+/*
+ * GC Create wrapper. Set up the cheap GC func wrappers to track
+ * GC validation on BackingStore windows
+ */
+
+static Bool
+miBSCreateGC (pGC)
+ GCPtr pGC;
+{
+ ScreenPtr pScreen = pGC->pScreen;
+ Bool ret;
+
+ SCREEN_PROLOGUE (pScreen, CreateGC);
+
+ if ( (ret = (*pScreen->CreateGC) (pGC)) )
+ {
+ pGC->devPrivates[miBSGCIndex].ptr = (pointer) pGC->funcs;
+ pGC->funcs = &miBSCheapGCFuncs;
+ }
+
+ SCREEN_EPILOGUE (pScreen, CreateGC, miBSCreateGC);
+
+ return ret;
+}
+
+static Bool
+miBSDestroyWindow (pWin)
+ WindowPtr pWin;
+{
+ ScreenPtr pScreen = pWin->drawable.pScreen;
+ Bool ret;
+
+ SCREEN_PROLOGUE (pScreen, DestroyWindow);
+
+ ret = (*pScreen->DestroyWindow) (pWin);
+
+ miBSFree (pWin);
+
+ SCREEN_EPILOGUE (pScreen, DestroyWindow, miBSDestroyWindow);
+
+ return ret;
+}
+
+/*
+ * cheap GC func wrappers. Simply track validation on windows
+ * with backing store to enable the real func/op wrappers
+ */
+
+static void
+miBSCheapValidateGC (pGC, stateChanges, pDrawable)
+ GCPtr pGC;
+ unsigned long stateChanges;
+ DrawablePtr pDrawable;
+{
+ CHEAP_FUNC_PROLOGUE (pGC);
+
+ if (pDrawable->type != DRAWABLE_PIXMAP &&
+ ((WindowPtr) pDrawable)->backStorage != NULL &&
+ miBSCreateGCPrivate (pGC))
+ {
+ (*pGC->funcs->ValidateGC) (pGC, stateChanges, pDrawable);
+ }
+ else
+ {
+ (*pGC->funcs->ValidateGC) (pGC, stateChanges, pDrawable);
+
+ /* rewrap funcs as Validate may have changed them */
+ pGC->devPrivates[miBSGCIndex].ptr = (pointer) pGC->funcs;
+
+ CHEAP_FUNC_EPILOGUE (pGC);
+ }
+}
+
+static void
+miBSCheapChangeGC (pGC, mask)
+ GCPtr pGC;
+ unsigned long mask;
+{
+ CHEAP_FUNC_PROLOGUE (pGC);
+
+ (*pGC->funcs->ChangeGC) (pGC, mask);
+
+ CHEAP_FUNC_EPILOGUE (pGC);
+}
+
+static void
+miBSCheapCopyGC (pGCSrc, mask, pGCDst)
+ GCPtr pGCSrc, pGCDst;
+ unsigned long mask;
+{
+ CHEAP_FUNC_PROLOGUE (pGCDst);
+
+ (*pGCDst->funcs->CopyGC) (pGCSrc, mask, pGCDst);
+
+ CHEAP_FUNC_EPILOGUE (pGCDst);
+}
+
+static void
+miBSCheapDestroyGC (pGC)
+ GCPtr pGC;
+{
+ CHEAP_FUNC_PROLOGUE (pGC);
+
+ (*pGC->funcs->DestroyGC) (pGC);
+
+ /* leave it unwrapped */
+}
+
+static void
+miBSCheapChangeClip (pGC, type, pvalue, nrects)
+ GCPtr pGC;
+ int type;
+ pointer pvalue;
+ int nrects;
+{
+ CHEAP_FUNC_PROLOGUE (pGC);
+
+ (*pGC->funcs->ChangeClip) (pGC, type, pvalue, nrects);
+
+ CHEAP_FUNC_EPILOGUE (pGC);
+}
+
+static void
+miBSCheapCopyClip(pgcDst, pgcSrc)
+ GCPtr pgcDst, pgcSrc;
+{
+ CHEAP_FUNC_PROLOGUE (pgcDst);
+
+ (* pgcDst->funcs->CopyClip)(pgcDst, pgcSrc);
+
+ CHEAP_FUNC_EPILOGUE (pgcDst);
+}
+
+static void
+miBSCheapDestroyClip(pGC)
+ GCPtr pGC;
+{
+ CHEAP_FUNC_PROLOGUE (pGC);
+
+ (* pGC->funcs->DestroyClip)(pGC);
+
+ CHEAP_FUNC_EPILOGUE (pGC);
+}
+
+/*
+ * create the full func/op wrappers for a GC
+ */
+
+static Bool
+miBSCreateGCPrivate (pGC)
+ GCPtr pGC;
+{
+ miBSGCRec *pPriv;
+
+ pPriv = (miBSGCRec *) xalloc (sizeof (miBSGCRec));
+ if (!pPriv)
+ return FALSE;
+ pPriv->pBackingGC = NULL;
+ pPriv->guarantee = GuaranteeNothing;
+ pPriv->serialNumber = 0;
+ pPriv->stateChanges = (1 << (GCLastBit + 1)) - 1;
+ pPriv->wrapOps = pGC->ops;
+ pPriv->wrapFuncs = pGC->funcs;
+ pGC->funcs = &miBSGCFuncs;
+ pGC->ops = &miBSGCOps;
+ pGC->devPrivates[miBSGCIndex].ptr = (pointer) pPriv;
+ return TRUE;
+}
+
+static void
+miBSDestroyGCPrivate (pGC)
+ GCPtr pGC;
+{
+ miBSGCRec *pPriv;
+
+ pPriv = (miBSGCRec *) pGC->devPrivates[miBSGCIndex].ptr;
+ if (pPriv)
+ {
+ pGC->devPrivates[miBSGCIndex].ptr = (pointer) pPriv->wrapFuncs;
+ pGC->funcs = &miBSCheapGCFuncs;
+ pGC->ops = pPriv->wrapOps;
+ if (pPriv->pBackingGC)
+ FreeGC (pPriv->pBackingGC, (GContext) 0);
+ xfree ((pointer) pPriv);
+ }
+}
+
+/*
+ * GC ops -- wrap each GC operation with our own function
+ */
+
+/*-
+ *-----------------------------------------------------------------------
+ * miBSFillSpans --
+ * Perform a FillSpans, routing output to backing-store as needed.
+ *
+ * Results:
+ * None.
+ *
+ * Side Effects:
+ *
+ *-----------------------------------------------------------------------
+ */
+static void
+miBSFillSpans(pDrawable, pGC, nInit, pptInit, pwidthInit, fSorted)
+ DrawablePtr pDrawable;
+ GCPtr pGC;
+ int nInit; /* number of spans to fill */
+ DDXPointPtr pptInit; /* pointer to list of start points */
+ int *pwidthInit; /* pointer to list of n widths */
+ int fSorted;
+{
+ DDXPointPtr pptCopy, pptReset;
+ int *pwidthCopy;
+ SETUP_BACKING (pDrawable, pGC);
+
+ PROLOGUE(pGC);
+
+ pptCopy = (DDXPointPtr)ALLOCATE_LOCAL(nInit*sizeof(DDXPointRec));
+ pwidthCopy=(int *)ALLOCATE_LOCAL(nInit*sizeof(int));
+ if (pptCopy && pwidthCopy)
+ {
+ copyData(pptInit, pptCopy, nInit, MoreCopy0);
+ memmove((char *)pwidthCopy,(char *)pwidthInit,nInit*sizeof(int));
+
+ (* pGC->ops->FillSpans)(pDrawable, pGC, nInit, pptInit,
+ pwidthInit, fSorted);
+ if (pGC->miTranslate)
+ {
+ int dx, dy;
+ int nReset;
+
+ pptReset = pptCopy;
+ dx = pDrawable->x - pBackingDrawable->x;
+ dy = pDrawable->y - pBackingDrawable->y;
+ nReset = nInit;
+ while (nReset--)
+ {
+ pptReset->x -= dx;
+ pptReset->y -= dy;
+ ++pptReset;
+ }
+ }
+ (* pBackingGC->ops->FillSpans)(pBackingDrawable,
+ pBackingGC, nInit, pptCopy, pwidthCopy,
+ fSorted);
+ }
+ if (pwidthCopy) DEALLOCATE_LOCAL(pwidthCopy);
+ if (pptCopy) DEALLOCATE_LOCAL(pptCopy);
+
+ EPILOGUE (pGC);
+}
+
+/*-
+ *-----------------------------------------------------------------------
+ * miBSSetSpans --
+ * Perform a SetSpans, routing output to backing-store as needed.
+ *
+ * Results:
+ * None.
+ *
+ * Side Effects:
+ *
+ *-----------------------------------------------------------------------
+ */
+static void
+miBSSetSpans(pDrawable, pGC, psrc, ppt, pwidth, nspans, fSorted)
+ DrawablePtr pDrawable;
+ GCPtr pGC;
+ char *psrc;
+ register DDXPointPtr ppt;
+ int *pwidth;
+ int nspans;
+ int fSorted;
+{
+ DDXPointPtr pptCopy, pptReset;
+ int *pwidthCopy;
+ SETUP_BACKING (pDrawable, pGC);
+
+ PROLOGUE(pGC);
+
+ pptCopy = (DDXPointPtr)ALLOCATE_LOCAL(nspans*sizeof(DDXPointRec));
+ pwidthCopy=(int *)ALLOCATE_LOCAL(nspans*sizeof(int));
+ if (pptCopy && pwidthCopy)
+ {
+ copyData(ppt, pptCopy, nspans, MoreCopy0);
+ memmove((char *)pwidthCopy,(char *)pwidth,nspans*sizeof(int));
+
+ (* pGC->ops->SetSpans)(pDrawable, pGC, psrc, ppt, pwidth,
+ nspans, fSorted);
+ if (pGC->miTranslate)
+ {
+ int dx, dy;
+ int nReset;
+
+ pptReset = pptCopy;
+ dx = pDrawable->x - pBackingDrawable->x;
+ dy = pDrawable->y - pBackingDrawable->y;
+ nReset = nspans;
+ while (nReset--)
+ {
+ pptReset->x -= dx;
+ pptReset->y -= dy;
+ ++pptReset;
+ }
+ }
+ (* pBackingGC->ops->SetSpans)(pBackingDrawable, pBackingGC,
+ psrc, pptCopy, pwidthCopy, nspans, fSorted);
+ }
+ if (pwidthCopy) DEALLOCATE_LOCAL(pwidthCopy);
+ if (pptCopy) DEALLOCATE_LOCAL(pptCopy);
+
+ EPILOGUE (pGC);
+}
+
+/*-
+ *-----------------------------------------------------------------------
+ * miBSPutImage --
+ * Perform a PutImage, routing output to backing-store as needed.
+ *
+ * Results:
+ * None.
+ *
+ * Side Effects:
+ *
+ *-----------------------------------------------------------------------
+ */
+static void
+miBSPutImage(pDrawable, pGC, depth, x, y, w, h, leftPad, format, pBits)
+ DrawablePtr pDrawable;
+ GCPtr pGC;
+ int depth;
+ int x;
+ int y;
+ int w;
+ int h;
+ int leftPad;
+ int format;
+ char *pBits;
+{
+ SETUP_BACKING (pDrawable, pGC);
+
+ PROLOGUE(pGC);
+
+ (*pGC->ops->PutImage)(pDrawable, pGC,
+ depth, x, y, w, h, leftPad, format, pBits);
+ (*pBackingGC->ops->PutImage)(pBackingDrawable, pBackingGC,
+ depth, x - pBackingStore->x, y - pBackingStore->y,
+ w, h, leftPad, format, pBits);
+
+ EPILOGUE (pGC);
+}
+
+/*-
+ *-----------------------------------------------------------------------
+ * miBSDoCopy --
+ * Perform a CopyArea or CopyPlane within a window that has backing
+ * store enabled.
+ *
+ * Results:
+ * TRUE if the copy was performed or FALSE if a regular one should
+ * be done.
+ *
+ * Side Effects:
+ * Things are copied (no s***!)
+ *
+ * Notes:
+ * The idea here is to form two regions that cover the source box.
+ * One contains the exposed rectangles while the other contains
+ * the obscured ones. An array of <box, drawable> pairs is then
+ * formed where the <box> indicates the area to be copied and the
+ * <drawable> indicates from where it is to be copied (exposed regions
+ * come from the screen while obscured ones come from the backing
+ * pixmap). The array 'sequence' is then filled with the indices of
+ * the pairs in the order in which they should be copied to prevent
+ * things from getting screwed up. A call is also made through the
+ * backingGC to take care of any copying into the backing pixmap.
+ *
+ *-----------------------------------------------------------------------
+ */
+static Bool
+miBSDoCopy(pWin, pGC, srcx, srcy, w, h, dstx, dsty, plane, copyProc, ppRgn)
+ WindowPtr pWin; /* Window being scrolled */
+ GCPtr pGC; /* GC we're called through */
+ int srcx; /* X of source rectangle */
+ int srcy; /* Y of source rectangle */
+ int w; /* Width of source rectangle */
+ int h; /* Height of source rectangle */
+ int dstx; /* X of destination rectangle */
+ int dsty; /* Y of destination rectangle */
+ unsigned long plane; /* Plane to copy (0 for CopyArea) */
+ RegionPtr (*copyProc)(); /* Procedure to call to perform the copy */
+ RegionPtr *ppRgn; /* resultant Graphics Expose region */
+{
+ RegionPtr pRgnExp; /* Exposed region */
+ RegionPtr pRgnObs; /* Obscured region */
+ BoxRec box; /* Source box (screen coord) */
+ struct BoxDraw {
+ BoxPtr pBox; /* Source box */
+ enum {
+ win, pix
+ } source; /* Place from which to copy */
+ } *boxes; /* Array of box/drawable pairs covering
+ * source box. */
+ int *sequence; /* Sequence of boxes to move */
+ register int i, j, k, l, y;
+ register BoxPtr pBox;
+ int dx, dy, nrects;
+ Bool graphicsExposures;
+ RegionPtr (*pixCopyProc)();
+ int numRectsExp, numRectsObs;
+ BoxPtr pBoxExp, pBoxObs;
+
+ SETUP_BACKING (pWin, pGC);
+
+ /*
+ * Create a region of exposed boxes in pRgnExp.
+ */
+ box.x1 = srcx + pWin->drawable.x;
+ box.x2 = box.x1 + w;
+ box.y1 = srcy + pWin->drawable.y;
+ box.y2 = box.y1 + h;
+
+ pRgnExp = REGION_CREATE(pGC->pScreen, &box, 1);
+ REGION_INTERSECT(pGC->pScreen, pRgnExp, pRgnExp, &pWin->clipList);
+ pRgnObs = REGION_CREATE(pGC->pScreen, NULL, 1);
+ REGION_INVERSE( pGC->pScreen, pRgnObs, pRgnExp, &box);
+
+ /*
+ * Translate regions into window coordinates for proper calls
+ * to the copyProc, then make sure none of the obscured region sticks
+ * into invalid areas of the backing pixmap.
+ */
+ REGION_TRANSLATE(pGC->pScreen, pRgnExp,
+ -pWin->drawable.x,
+ -pWin->drawable.y);
+ REGION_TRANSLATE(pGC->pScreen, pRgnObs,
+ -pWin->drawable.x,
+ -pWin->drawable.y);
+ REGION_INTERSECT(pGC->pScreen, pRgnObs, pRgnObs, &pBackingStore->SavedRegion);
+
+ /*
+ * If the obscured region is empty, there's no point being fancy.
+ */
+ if (!REGION_NOTEMPTY(pGC->pScreen, pRgnObs))
+ {
+ REGION_DESTROY(pGC->pScreen, pRgnExp);
+ REGION_DESTROY(pGC->pScreen, pRgnObs);
+
+ return (FALSE);
+ }
+
+ numRectsExp = REGION_NUM_RECTS(pRgnExp);
+ pBoxExp = REGION_RECTS(pRgnExp);
+ pBoxObs = REGION_RECTS(pRgnObs);
+ numRectsObs = REGION_NUM_RECTS(pRgnObs);
+ nrects = numRectsExp + numRectsObs;
+
+ boxes = (struct BoxDraw *)ALLOCATE_LOCAL(nrects * sizeof(struct BoxDraw));
+ sequence = (int *) ALLOCATE_LOCAL(nrects * sizeof(int));
+ *ppRgn = NULL;
+
+ if (!boxes || !sequence)
+ {
+ if (sequence) DEALLOCATE_LOCAL(sequence);
+ if (boxes) DEALLOCATE_LOCAL(boxes);
+ REGION_DESTROY(pGC->pScreen, pRgnExp);
+ REGION_DESTROY(pGC->pScreen, pRgnObs);
+
+ return(TRUE);
+ }
+
+ /*
+ * Order the boxes in the two regions so we know from which drawable
+ * to copy which box, storing the result in the boxes array
+ */
+ for (i = 0, j = 0, k = 0;
+ (i < numRectsExp) && (j < numRectsObs);
+ k++)
+ {
+ if (pBoxExp[i].y1 < pBoxObs[j].y1)
+ {
+ boxes[k].pBox = &pBoxExp[i];
+ boxes[k].source = win;
+ i++;
+ }
+ else if ((pBoxObs[j].y1 < pBoxExp[i].y1) ||
+ (pBoxObs[j].x1 < pBoxExp[i].x1))
+ {
+ boxes[k].pBox = &pBoxObs[j];
+ boxes[k].source = pix;
+ j++;
+ }
+ else
+ {
+ boxes[k].pBox = &pBoxExp[i];
+ boxes[k].source = win;
+ i++;
+ }
+ }
+
+ /*
+ * Catch any leftover boxes from either region (note that only
+ * one can have leftover boxes...)
+ */
+ if (i != numRectsExp)
+ {
+ do
+ {
+ boxes[k].pBox = &pBoxExp[i];
+ boxes[k].source = win;
+ i++;
+ k++;
+ } while (i < numRectsExp);
+
+ }
+ else
+ {
+ do
+ {
+ boxes[k].pBox = &pBoxObs[j];
+ boxes[k].source = pix;
+ j++;
+ k++;
+ } while (j < numRectsObs);
+ }
+
+ if (dsty <= srcy)
+ {
+ /*
+ * Scroll up or vertically stationary, so vertical order is ok.
+ */
+ if (dstx <= srcx)
+ {
+ /*
+ * Scroll left or horizontally stationary, so horizontal order
+ * is ok as well.
+ */
+ for (i = 0; i < nrects; i++)
+ {
+ sequence[i] = i;
+ }
+ }
+ else
+ {
+ /*
+ * Scroll right. Need to reverse the rectangles within each
+ * band.
+ */
+ for (i = 0, j = 1, k = 0;
+ i < nrects;
+ j = i + 1, k = i)
+ {
+ y = boxes[i].pBox->y1;
+ while ((j < nrects) && (boxes[j].pBox->y1 == y))
+ {
+ j++;
+ }
+ for (j--; j >= k; j--, i++)
+ {
+ sequence[i] = j;
+ }
+ }
+ }
+ }
+ else
+ {
+ /*
+ * Scroll down. Must reverse vertical banding, at least.
+ */
+ if (dstx < srcx)
+ {
+ /*
+ * Scroll left. Horizontal order is ok.
+ */
+ for (i = nrects - 1, j = i - 1, k = i, l = 0;
+ i >= 0;
+ j = i - 1, k = i)
+ {
+ /*
+ * Find extent of current horizontal band, then reverse
+ * the order of the whole band.
+ */
+ y = boxes[i].pBox->y1;
+ while ((j >= 0) && (boxes[j].pBox->y1 == y))
+ {
+ j--;
+ }
+ for (j++; j <= k; j++, i--, l++)
+ {
+ sequence[l] = j;
+ }
+ }
+ }
+ else
+ {
+ /*
+ * Scroll right or horizontal stationary.
+ * Reverse horizontal order as well (if stationary, horizontal
+ * order can be swapped without penalty and this is faster
+ * to compute).
+ */
+ for (i = 0, j = nrects - 1; i < nrects; i++, j--)
+ {
+ sequence[i] = j;
+ }
+ }
+ }
+
+ /*
+ * XXX: To avoid getting multiple NoExpose events from this operation,
+ * we turn OFF graphicsExposures in the gc and deal with any uncopied
+ * areas later, if there's something not in backing-store.
+ */
+
+ graphicsExposures = pGC->graphicsExposures;
+ pGC->graphicsExposures = FALSE;
+
+ dx = dstx - srcx;
+ dy = dsty - srcy;
+
+ /*
+ * Figure out which copy procedure to use from the backing GC. Note we
+ * must do this because some implementations (sun's, e.g.) have
+ * pBackingGC a fake GC with the real one below it, thus the devPriv for
+ * pBackingGC won't be what the output library expects.
+ */
+ if (plane != 0)
+ {
+ pixCopyProc = pBackingGC->ops->CopyPlane;
+ }
+ else
+ {
+ pixCopyProc = pBackingGC->ops->CopyArea;
+ }
+
+ for (i = 0; i < nrects; i++)
+ {
+ pBox = boxes[sequence[i]].pBox;
+
+ /*
+ * If we're copying from the pixmap, we need to place its contents
+ * onto the screen before scrolling the pixmap itself. If we're copying
+ * from the window, we need to copy its contents into the pixmap before
+ * we scroll the window itself.
+ */
+ if (boxes[sequence[i]].source == pix)
+ {
+ (void) (* copyProc) (pBackingDrawable, pWin, pGC,
+ pBox->x1 - pBackingStore->x,
+ pBox->y1 - pBackingStore->y,
+ pBox->x2 - pBox->x1, pBox->y2 - pBox->y1,
+ pBox->x1 + dx, pBox->y1 + dy, plane);
+ (void) (* pixCopyProc) (pBackingDrawable, pBackingDrawable, pBackingGC,
+ pBox->x1 - pBackingStore->x,
+ pBox->y1 - pBackingStore->y,
+ pBox->x2 - pBox->x1, pBox->y2 - pBox->y1,
+ pBox->x1 + dx - pBackingStore->x,
+ pBox->y1 + dy - pBackingStore->y, plane);
+ }
+ else
+ {
+ (void) (* pixCopyProc) (pWin, pBackingDrawable, pBackingGC,
+ pBox->x1, pBox->y1,
+ pBox->x2 - pBox->x1, pBox->y2 - pBox->y1,
+ pBox->x1 + dx - pBackingStore->x,
+ pBox->y1 + dy - pBackingStore->y, plane);
+ (void) (* copyProc) (pWin, pWin, pGC,
+ pBox->x1, pBox->y1,
+ pBox->x2 - pBox->x1, pBox->y2 - pBox->y1,
+ pBox->x1 + dx, pBox->y1 + dy, plane);
+ }
+ }
+ DEALLOCATE_LOCAL(sequence);
+ DEALLOCATE_LOCAL(boxes);
+
+ pGC->graphicsExposures = graphicsExposures;
+ /*
+ * Form union of rgnExp and rgnObs and see if covers entire area
+ * to be copied. Store the resultant region for miBSCopyArea
+ * to return to dispatch which will send the appropriate expose
+ * events.
+ */
+ REGION_UNION(pGC->pScreen, pRgnExp, pRgnExp, pRgnObs);
+ box.x1 = srcx;
+ box.x2 = srcx + w;
+ box.y1 = srcy;
+ box.y2 = srcy + h;
+ if (RECT_IN_REGION(pGC->pScreen, pRgnExp, &box) == rgnIN)
+ {
+ REGION_EMPTY(pGC->pScreen, pRgnExp);
+ }
+ else
+ {
+ REGION_INVERSE( pGC->pScreen, pRgnExp, pRgnExp, &box);
+ REGION_TRANSLATE( pGC->pScreen, pRgnExp,
+ dx + pWin->drawable.x,
+ dy + pWin->drawable.y);
+ REGION_INTERSECT( pGC->pScreen, pRgnObs, pRgnExp, &pWin->clipList);
+ (*pWin->drawable.pScreen->PaintWindowBackground) (pWin,
+ pRgnObs, PW_BACKGROUND);
+ REGION_TRANSLATE( pGC->pScreen, pRgnExp,
+ -pWin->drawable.x,
+ -pWin->drawable.y);
+ miBSClearBackingRegion (pWin, pRgnExp);
+ }
+ if (graphicsExposures)
+ *ppRgn = pRgnExp;
+ else
+ REGION_DESTROY(pGC->pScreen, pRgnExp);
+ REGION_DESTROY(pGC->pScreen, pRgnObs);
+
+ return (TRUE);
+}
+
+/*-
+ *-----------------------------------------------------------------------
+ * miBSCopyArea --
+ * Perform a CopyArea from the source to the destination, extracting
+ * from the source's backing-store and storing into the destination's
+ * backing-store without messing anything up. If the source and
+ * destination are different, there's not too much to worry about:
+ * we can just issue several calls to the regular CopyArea function.
+ *
+ * Results:
+ * None.
+ *
+ * Side Effects:
+ *
+ *-----------------------------------------------------------------------
+ */
+static RegionPtr
+miBSCopyArea (pSrc, pDst, pGC, srcx, srcy, w, h, dstx, dsty)
+ DrawablePtr pSrc;
+ DrawablePtr pDst;
+ GCPtr pGC;
+ int srcx;
+ int srcy;
+ int w;
+ int h;
+ int dstx;
+ int dsty;
+{
+ BoxPtr pExtents;
+ long dx, dy;
+ int bsrcx, bsrcy, bw, bh, bdstx, bdsty;
+ RegionPtr pixExposed = 0, winExposed = 0;
+
+ SETUP_BACKING(pDst, pGC);
+
+ PROLOGUE(pGC);
+
+ if ((pSrc != pDst) ||
+ (!miBSDoCopy((WindowPtr)pSrc, pGC, srcx, srcy, w, h, dstx, dsty,
+ (unsigned long) 0, pGC->ops->CopyArea, &winExposed)))
+ {
+ /*
+ * always copy to the backing store first, miBSDoCopy
+ * returns FALSE if the *source* region is disjoint
+ * from the backing store saved region. So, copying
+ * *to* the backing store is always safe
+ */
+ if (pGC->clientClipType != CT_PIXMAP)
+ {
+ /*
+ * adjust srcx, srcy, w, h, dstx, dsty to be clipped to
+ * the backing store. An unnecessary optimisation,
+ * but a useful one when GetSpans is slow.
+ */
+ pExtents = REGION_EXTENTS(pDst->pScreen,
+ (RegionPtr)pBackingGC->clientClip);
+ bsrcx = srcx;
+ bsrcy = srcy;
+ bw = w;
+ bh = h;
+ bdstx = dstx;
+ bdsty = dsty;
+ dx = pExtents->x1 - bdstx;
+ if (dx > 0)
+ {
+ bsrcx += dx;
+ bdstx += dx;
+ bw -= dx;
+ }
+ dy = pExtents->y1 - bdsty;
+ if (dy > 0)
+ {
+ bsrcy += dy;
+ bdsty += dy;
+ bh -= dy;
+ }
+ dx = (bdstx + bw) - pExtents->x2;
+ if (dx > 0)
+ bw -= dx;
+ dy = (bdsty + bh) - pExtents->y2;
+ if (dy > 0)
+ bh -= dy;
+ if (bw > 0 && bh > 0)
+ pixExposed = (* pBackingGC->ops->CopyArea) (pSrc,
+ pBackingDrawable, pBackingGC,
+ bsrcx, bsrcy, bw, bh, bdstx - pBackingStore->x,
+ bdsty - pBackingStore->y);
+ }
+ else
+ pixExposed = (* pBackingGC->ops->CopyArea) (pSrc,
+ pBackingDrawable, pBackingGC,
+ srcx, srcy, w, h,
+ dstx - pBackingStore->x, dsty - pBackingStore->y);
+
+ winExposed = (* pGC->ops->CopyArea) (pSrc, pDst, pGC, srcx, srcy, w, h, dstx, dsty);
+ }
+
+ /*
+ * compute the composite graphics exposure region
+ */
+ if (winExposed)
+ {
+ if (pixExposed){
+ REGION_UNION(pDst->pScreen, winExposed, winExposed, pixExposed);
+ REGION_DESTROY(pDst->pScreen, pixExposed);
+ }
+ } else
+ winExposed = pixExposed;
+
+ EPILOGUE (pGC);
+
+ return winExposed;
+}
+
+/*-
+ *-----------------------------------------------------------------------
+ * miBSCopyPlane --
+ *
+ * Results:
+ * None.
+ *
+ * Side Effects:
+ *
+ *-----------------------------------------------------------------------
+ */
+static RegionPtr
+miBSCopyPlane (pSrc, pDst, pGC, srcx, srcy, w, h, dstx, dsty, plane)
+ DrawablePtr pSrc;
+ DrawablePtr pDst;
+ register GC *pGC;
+ int srcx,
+ srcy;
+ int w,
+ h;
+ int dstx,
+ dsty;
+ unsigned long plane;
+{
+ BoxPtr pExtents;
+ long dx, dy;
+ int bsrcx, bsrcy, bw, bh, bdstx, bdsty;
+ RegionPtr winExposed = 0, pixExposed = 0;
+ SETUP_BACKING(pDst, pGC);
+
+ PROLOGUE(pGC);
+
+ if ((pSrc != pDst) ||
+ (!miBSDoCopy((WindowPtr)pSrc, pGC, srcx, srcy, w, h, dstx, dsty,
+ plane, pGC->ops->CopyPlane, &winExposed)))
+ {
+ /*
+ * always copy to the backing store first, miBSDoCopy
+ * returns FALSE if the *source* region is disjoint
+ * from the backing store saved region. So, copying
+ * *to* the backing store is always safe
+ */
+ if (pGC->clientClipType != CT_PIXMAP)
+ {
+ /*
+ * adjust srcx, srcy, w, h, dstx, dsty to be clipped to
+ * the backing store. An unnecessary optimisation,
+ * but a useful one when GetSpans is slow.
+ */
+ pExtents = REGION_EXTENTS(pDst->pScreen,
+ (RegionPtr)pBackingGC->clientClip);
+ bsrcx = srcx;
+ bsrcy = srcy;
+ bw = w;
+ bh = h;
+ bdstx = dstx;
+ bdsty = dsty;
+ dx = pExtents->x1 - bdstx;
+ if (dx > 0)
+ {
+ bsrcx += dx;
+ bdstx += dx;
+ bw -= dx;
+ }
+ dy = pExtents->y1 - bdsty;
+ if (dy > 0)
+ {
+ bsrcy += dy;
+ bdsty += dy;
+ bh -= dy;
+ }
+ dx = (bdstx + bw) - pExtents->x2;
+ if (dx > 0)
+ bw -= dx;
+ dy = (bdsty + bh) - pExtents->y2;
+ if (dy > 0)
+ bh -= dy;
+ if (bw > 0 && bh > 0)
+ pixExposed = (* pBackingGC->ops->CopyPlane) (pSrc,
+ pBackingDrawable,
+ pBackingGC, bsrcx, bsrcy, bw, bh,
+ bdstx - pBackingStore->x,
+ bdsty - pBackingStore->y, plane);
+ }
+ else
+ pixExposed = (* pBackingGC->ops->CopyPlane) (pSrc,
+ pBackingDrawable,
+ pBackingGC, srcx, srcy, w, h,
+ dstx - pBackingStore->x,
+ dsty - pBackingStore->y, plane);
+
+ winExposed = (* pGC->ops->CopyPlane) (pSrc, pDst, pGC, srcx, srcy, w, h,
+ dstx, dsty, plane);
+
+ }
+
+ /*
+ * compute the composite graphics exposure region
+ */
+ if (winExposed)
+ {
+ if (pixExposed)
+ {
+ REGION_UNION(pDst->pScreen, winExposed, winExposed, pixExposed);
+ REGION_DESTROY(pDst->pScreen, pixExposed);
+ }
+ } else
+ winExposed = pixExposed;
+
+ EPILOGUE (pGC);
+
+ return winExposed;
+}
+
+/*-
+ *-----------------------------------------------------------------------
+ * miBSPolyPoint --
+ * Perform a PolyPoint, routing output to backing-store as needed.
+ *
+ * Results:
+ * None.
+ *
+ * Side Effects:
+ *
+ *-----------------------------------------------------------------------
+ */
+static void
+miBSPolyPoint (pDrawable, pGC, mode, npt, pptInit)
+ DrawablePtr pDrawable;
+ GCPtr pGC;
+ int mode; /* Origin or Previous */
+ int npt;
+ xPoint *pptInit;
+{
+ xPoint *pptCopy;
+ SETUP_BACKING (pDrawable, pGC);
+
+ PROLOGUE(pGC);
+
+ pptCopy = (xPoint *)ALLOCATE_LOCAL(npt*sizeof(xPoint));
+ if (pptCopy)
+ {
+ copyPoints(pptInit, pptCopy, npt, mode);
+
+ (* pGC->ops->PolyPoint) (pDrawable, pGC, mode, npt, pptInit);
+
+ (* pBackingGC->ops->PolyPoint) (pBackingDrawable,
+ pBackingGC, mode, npt, pptCopy);
+
+ DEALLOCATE_LOCAL(pptCopy);
+ }
+
+ EPILOGUE (pGC);
+}
+
+/*-
+ *-----------------------------------------------------------------------
+ * miBSPolyLines --
+ * Perform a Polylines, routing output to backing-store as needed.
+ *
+ * Results:
+ *
+ * Side Effects:
+ *
+ *-----------------------------------------------------------------------
+ */
+static void
+miBSPolylines (pDrawable, pGC, mode, npt, pptInit)
+ DrawablePtr pDrawable;
+ GCPtr pGC;
+ int mode;
+ int npt;
+ DDXPointPtr pptInit;
+{
+ DDXPointPtr pptCopy;
+ SETUP_BACKING (pDrawable, pGC);
+
+ PROLOGUE(pGC);
+
+ pptCopy = (DDXPointPtr)ALLOCATE_LOCAL(npt*sizeof(DDXPointRec));
+ if (pptCopy)
+ {
+ copyPoints(pptInit, pptCopy, npt, mode);
+
+ (* pGC->ops->Polylines)(pDrawable, pGC, mode, npt, pptInit);
+ (* pBackingGC->ops->Polylines)(pBackingDrawable,
+ pBackingGC, mode, npt, pptCopy);
+ DEALLOCATE_LOCAL(pptCopy);
+ }
+
+ EPILOGUE (pGC);
+}
+
+/*-
+ *-----------------------------------------------------------------------
+ * miBSPolySegment --
+ * Perform a PolySegment, routing output to backing-store as needed.
+ *
+ * Results:
+ * None.
+ *
+ * Side Effects:
+ *
+ *-----------------------------------------------------------------------
+ */
+static void
+miBSPolySegment(pDrawable, pGC, nseg, pSegs)
+ DrawablePtr pDrawable;
+ GCPtr pGC;
+ int nseg;
+ xSegment *pSegs;
+{
+ xSegment *pSegsCopy;
+
+ SETUP_BACKING (pDrawable, pGC);
+
+ PROLOGUE(pGC);
+
+ pSegsCopy = (xSegment *)ALLOCATE_LOCAL(nseg*sizeof(xSegment));
+ if (pSegsCopy)
+ {
+ copyData(pSegs, pSegsCopy, nseg << 1, MoreCopy0);
+
+ (* pGC->ops->PolySegment)(pDrawable, pGC, nseg, pSegs);
+ (* pBackingGC->ops->PolySegment)(pBackingDrawable,
+ pBackingGC, nseg, pSegsCopy);
+
+ DEALLOCATE_LOCAL(pSegsCopy);
+ }
+
+ EPILOGUE (pGC);
+}
+
+/*-
+ *-----------------------------------------------------------------------
+ * miBSPolyRectangle --
+ * Perform a PolyRectangle, routing output to backing-store as needed.
+ *
+ * Results:
+ * None
+ *
+ * Side Effects:
+ *
+ *-----------------------------------------------------------------------
+ */
+static void
+miBSPolyRectangle(pDrawable, pGC, nrects, pRects)
+ DrawablePtr pDrawable;
+ GCPtr pGC;
+ int nrects;
+ xRectangle *pRects;
+{
+ xRectangle *pRectsCopy;
+ SETUP_BACKING (pDrawable, pGC);
+
+ PROLOGUE(pGC);
+
+ pRectsCopy =(xRectangle *)ALLOCATE_LOCAL(nrects*sizeof(xRectangle));
+ if (pRectsCopy)
+ {
+ copyData(pRects, pRectsCopy, nrects, MoreCopy2);
+
+ (* pGC->ops->PolyRectangle)(pDrawable, pGC, nrects, pRects);
+ (* pBackingGC->ops->PolyRectangle)(pBackingDrawable,
+ pBackingGC, nrects, pRectsCopy);
+
+ DEALLOCATE_LOCAL(pRectsCopy);
+ }
+
+ EPILOGUE (pGC);
+}
+
+/*-
+ *-----------------------------------------------------------------------
+ * miBSPolyArc --
+ * Perform a PolyArc, routing output to backing-store as needed.
+ *
+ * Results:
+ *
+ * Side Effects:
+ *
+ *-----------------------------------------------------------------------
+ */
+static void
+miBSPolyArc(pDrawable, pGC, narcs, parcs)
+ DrawablePtr pDrawable;
+ GCPtr pGC;
+ int narcs;
+ xArc *parcs;
+{
+ xArc *pArcsCopy;
+ SETUP_BACKING (pDrawable, pGC);
+
+ PROLOGUE(pGC);
+
+ pArcsCopy = (xArc *)ALLOCATE_LOCAL(narcs*sizeof(xArc));
+ if (pArcsCopy)
+ {
+ copyData(parcs, pArcsCopy, narcs, MoreCopy4);
+
+ (* pGC->ops->PolyArc)(pDrawable, pGC, narcs, parcs);
+ (* pBackingGC->ops->PolyArc)(pBackingDrawable, pBackingGC,
+ narcs, pArcsCopy);
+
+ DEALLOCATE_LOCAL(pArcsCopy);
+ }
+
+ EPILOGUE (pGC);
+}
+
+/*-
+ *-----------------------------------------------------------------------
+ * miBSFillPolygon --
+ * Perform a FillPolygon, routing output to backing-store as needed.
+ *
+ * Results:
+ * None.
+ *
+ * Side Effects:
+ *
+ *-----------------------------------------------------------------------
+ */
+static void
+miBSFillPolygon(pDrawable, pGC, shape, mode, count, pPts)
+ DrawablePtr pDrawable;
+ register GCPtr pGC;
+ int shape, mode;
+ register int count;
+ DDXPointPtr pPts;
+{
+ DDXPointPtr pPtsCopy;
+ SETUP_BACKING (pDrawable, pGC);
+
+ PROLOGUE(pGC);
+
+ pPtsCopy = (DDXPointPtr)ALLOCATE_LOCAL(count*sizeof(DDXPointRec));
+ if (pPtsCopy)
+ {
+ copyPoints(pPts, pPtsCopy, count, mode);
+ (* pGC->ops->FillPolygon)(pDrawable, pGC, shape, mode, count, pPts);
+ (* pBackingGC->ops->FillPolygon)(pBackingDrawable,
+ pBackingGC, shape, mode,
+ count, pPtsCopy);
+
+ DEALLOCATE_LOCAL(pPtsCopy);
+ }
+
+ EPILOGUE (pGC);
+}
+
+/*-
+ *-----------------------------------------------------------------------
+ * miBSPolyFillRect --
+ * Perform a PolyFillRect, routing output to backing-store as needed.
+ *
+ * Results:
+ * None.
+ *
+ * Side Effects:
+ *
+ *-----------------------------------------------------------------------
+ */
+static void
+miBSPolyFillRect(pDrawable, pGC, nrectFill, prectInit)
+ DrawablePtr pDrawable;
+ GCPtr pGC;
+ int nrectFill; /* number of rectangles to fill */
+ xRectangle *prectInit; /* Pointer to first rectangle to fill */
+{
+ xRectangle *pRectCopy;
+ SETUP_BACKING (pDrawable, pGC);
+
+ PROLOGUE(pGC);
+
+ pRectCopy =
+ (xRectangle *)ALLOCATE_LOCAL(nrectFill*sizeof(xRectangle));
+ if (pRectCopy)
+ {
+ copyData(prectInit, pRectCopy, nrectFill, MoreCopy2);
+
+ (* pGC->ops->PolyFillRect)(pDrawable, pGC, nrectFill, prectInit);
+ (* pBackingGC->ops->PolyFillRect)(pBackingDrawable,
+ pBackingGC, nrectFill, pRectCopy);
+
+ DEALLOCATE_LOCAL(pRectCopy);
+ }
+
+ EPILOGUE (pGC);
+}
+
+/*-
+ *-----------------------------------------------------------------------
+ * miBSPolyFillArc --
+ * Perform a PolyFillArc, routing output to backing-store as needed.
+ *
+ * Results:
+ * None.
+ *
+ * Side Effects:
+ *
+ *-----------------------------------------------------------------------
+ */
+static void
+miBSPolyFillArc(pDrawable, pGC, narcs, parcs)
+ DrawablePtr pDrawable;
+ GCPtr pGC;
+ int narcs;
+ xArc *parcs;
+{
+ xArc *pArcsCopy;
+ SETUP_BACKING (pDrawable, pGC);
+
+ PROLOGUE(pGC);
+
+ pArcsCopy = (xArc *)ALLOCATE_LOCAL(narcs*sizeof(xArc));
+ if (pArcsCopy)
+ {
+ copyData(parcs, pArcsCopy, narcs, MoreCopy4);
+ (* pGC->ops->PolyFillArc)(pDrawable, pGC, narcs, parcs);
+ (* pBackingGC->ops->PolyFillArc)(pBackingDrawable,
+ pBackingGC, narcs, pArcsCopy);
+ DEALLOCATE_LOCAL(pArcsCopy);
+ }
+
+ EPILOGUE (pGC);
+}
+
+
+/*-
+ *-----------------------------------------------------------------------
+ * miBSPolyText8 --
+ * Perform a PolyText8, routing output to backing-store as needed.
+ *
+ * Results:
+ *
+ * Side Effects:
+ *
+ *-----------------------------------------------------------------------
+ */
+static int
+miBSPolyText8(pDrawable, pGC, x, y, count, chars)
+ DrawablePtr pDrawable;
+ GCPtr pGC;
+ int x, y;
+ int count;
+ char *chars;
+{
+ int result;
+ SETUP_BACKING (pDrawable, pGC);
+
+ PROLOGUE(pGC);
+
+ result = (* pGC->ops->PolyText8)(pDrawable, pGC, x, y, count, chars);
+ (* pBackingGC->ops->PolyText8)(pBackingDrawable, pBackingGC,
+ x - pBackingStore->x, y - pBackingStore->y,
+ count, chars);
+
+ EPILOGUE (pGC);
+ return result;
+}
+
+/*-
+ *-----------------------------------------------------------------------
+ * miBSPolyText16 --
+ * Perform a PolyText16, routing output to backing-store as needed.
+ *
+ * Results:
+ *
+ * Side Effects:
+ *
+ *-----------------------------------------------------------------------
+ */
+static int
+miBSPolyText16(pDrawable, pGC, x, y, count, chars)
+ DrawablePtr pDrawable;
+ GCPtr pGC;
+ int x, y;
+ int count;
+ unsigned short *chars;
+{
+ int result;
+ SETUP_BACKING (pDrawable, pGC);
+
+ PROLOGUE(pGC);
+
+ result = (* pGC->ops->PolyText16)(pDrawable, pGC, x, y, count, chars);
+ (* pBackingGC->ops->PolyText16)(pBackingDrawable, pBackingGC,
+ x - pBackingStore->x, y - pBackingStore->y,
+ count, chars);
+
+ EPILOGUE (pGC);
+
+ return result;
+}
+
+/*-
+ *-----------------------------------------------------------------------
+ * miBSImageText8 --
+ * Perform a ImageText8, routing output to backing-store as needed.
+ *
+ * Results:
+ *
+ * Side Effects:
+ *
+ *-----------------------------------------------------------------------
+ */
+static void
+miBSImageText8(pDrawable, pGC, x, y, count, chars)
+ DrawablePtr pDrawable;
+ GCPtr pGC;
+ int x, y;
+ int count;
+ char *chars;
+{
+ SETUP_BACKING (pDrawable, pGC);
+ PROLOGUE(pGC);
+
+ (* pGC->ops->ImageText8)(pDrawable, pGC, x, y, count, chars);
+ (* pBackingGC->ops->ImageText8)(pBackingDrawable, pBackingGC,
+ x - pBackingStore->x, y - pBackingStore->y,
+ count, chars);
+
+ EPILOGUE (pGC);
+}
+
+/*-
+ *-----------------------------------------------------------------------
+ * miBSImageText16 --
+ * Perform a ImageText16, routing output to backing-store as needed.
+ *
+ * Results:
+ *
+ * Side Effects:
+ *
+ *-----------------------------------------------------------------------
+ */
+static void
+miBSImageText16(pDrawable, pGC, x, y, count, chars)
+ DrawablePtr pDrawable;
+ GCPtr pGC;
+ int x, y;
+ int count;
+ unsigned short *chars;
+{
+ SETUP_BACKING (pDrawable, pGC);
+ PROLOGUE(pGC);
+
+ (* pGC->ops->ImageText16)(pDrawable, pGC, x, y, count, chars);
+ (* pBackingGC->ops->ImageText16)(pBackingDrawable, pBackingGC,
+ x - pBackingStore->x, y - pBackingStore->y,
+ count, chars);
+
+ EPILOGUE (pGC);
+}
+
+/*-
+ *-----------------------------------------------------------------------
+ * miBSImageGlyphBlt --
+ * Perform a ImageGlyphBlt, routing output to backing-store as needed.
+ *
+ * Results:
+ *
+ * Side Effects:
+ *
+ *-----------------------------------------------------------------------
+ */
+static void
+miBSImageGlyphBlt(pDrawable, pGC, x, y, nglyph, ppci, pglyphBase)
+ DrawablePtr pDrawable;
+ GCPtr pGC;
+ int x, y;
+ unsigned int nglyph;
+ CharInfoPtr *ppci; /* array of character info */
+ pointer pglyphBase; /* start of array of glyphs */
+{
+ SETUP_BACKING (pDrawable, pGC);
+ PROLOGUE(pGC);
+
+ (* pGC->ops->ImageGlyphBlt)(pDrawable, pGC, x, y, nglyph, ppci,
+ pglyphBase);
+ (* pBackingGC->ops->ImageGlyphBlt)(pBackingDrawable, pBackingGC,
+ x - pBackingStore->x, y - pBackingStore->y,
+ nglyph, ppci, pglyphBase);
+
+ EPILOGUE (pGC);
+}
+
+/*-
+ *-----------------------------------------------------------------------
+ * miBSPolyGlyphBlt --
+ * Perform a PolyGlyphBlt, routing output to backing-store as needed.
+ *
+ * Results:
+ *
+ * Side Effects:
+ *
+ *-----------------------------------------------------------------------
+ */
+static void
+miBSPolyGlyphBlt(pDrawable, pGC, x, y, nglyph, ppci, pglyphBase)
+ DrawablePtr pDrawable;
+ GCPtr pGC;
+ int x, y;
+ unsigned int nglyph;
+ CharInfoPtr *ppci; /* array of character info */
+ pointer pglyphBase; /* start of array of glyphs */
+{
+ SETUP_BACKING (pDrawable, pGC);
+ PROLOGUE(pGC);
+
+ (* pGC->ops->PolyGlyphBlt)(pDrawable, pGC, x, y, nglyph,
+ ppci, pglyphBase);
+ (* pBackingGC->ops->PolyGlyphBlt)(pBackingDrawable, pBackingGC,
+ x - pBackingStore->x, y - pBackingStore->y,
+ nglyph, ppci, pglyphBase);
+ EPILOGUE (pGC);
+}
+
+/*-
+ *-----------------------------------------------------------------------
+ * miBSPushPixels --
+ * Perform a PushPixels, routing output to backing-store as needed.
+ *
+ * Results:
+ *
+ * Side Effects:
+ *
+ *-----------------------------------------------------------------------
+ */
+static void
+miBSPushPixels(pGC, pBitMap, pDst, w, h, x, y)
+ GCPtr pGC;
+ PixmapPtr pBitMap;
+ DrawablePtr pDst;
+ int w, h, x, y;
+{
+ SETUP_BACKING (pDst, pGC);
+ PROLOGUE(pGC);
+
+ (* pGC->ops->PushPixels)(pGC, pBitMap, pDst, w, h, x, y);
+ if (pGC->miTranslate) {
+ x -= pDst->x;
+ y -= pDst->y;
+ }
+ (* pBackingGC->ops->PushPixels)(pBackingGC, pBitMap,
+ pBackingDrawable, w, h,
+ x - pBackingStore->x, y - pBackingStore->y);
+
+ EPILOGUE (pGC);
+}
+
+#ifdef NEED_LINEHELPER
+/*-
+ *-----------------------------------------------------------------------
+ * miBSLineHelper --
+ *
+ * Results: should never be called
+ *
+ * Side Effects: server dies
+ *
+ *-----------------------------------------------------------------------
+ */
+static void
+miBSLineHelper()
+{
+ FatalError("miBSLineHelper called\n");
+}
+#endif
+
+/*-
+ *-----------------------------------------------------------------------
+ * miBSClearBackingStore --
+ * Clear the given area of the backing pixmap with the background of
+ * the window, whatever it is. If generateExposures is TRUE, generate
+ * exposure events for the area. Note that if the area has any
+ * part outside the saved portions of the window, we do not allow the
+ * count in the expose events to be 0, since there will be more
+ * expose events to come.
+ *
+ * Results:
+ * None.
+ *
+ * Side Effects:
+ * Areas of pixmap are cleared and Expose events are generated.
+ *
+ *-----------------------------------------------------------------------
+ */
+static RegionPtr
+miBSClearBackingStore(pWin, x, y, w, h, generateExposures)
+ WindowPtr pWin;
+ int x;
+ int y;
+ int w;
+ int h;
+ Bool generateExposures;
+{
+ RegionPtr pRgn;
+ int i;
+ miBSWindowPtr pBackingStore;
+ ScreenPtr pScreen;
+ GCPtr pGC;
+ int ts_x_origin,
+ ts_y_origin;
+ pointer gcvalues[4];
+ unsigned long gcmask;
+ xRectangle *rects;
+ BoxPtr pBox;
+ BoxRec box;
+ PixUnion background;
+ char backgroundState;
+ int numRects;
+
+ pBackingStore = (miBSWindowPtr)pWin->backStorage;
+ pScreen = pWin->drawable.pScreen;
+
+ if ((pBackingStore->status == StatusNoPixmap) ||
+ (pBackingStore->status == StatusBadAlloc))
+ return NullRegion;
+
+ if (w == 0)
+ w = (int) pWin->drawable.width - x;
+ if (h == 0)
+ h = (int) pWin->drawable.height - y;
+
+ box.x1 = x;
+ box.y1 = y;
+ box.x2 = x + w;
+ box.y2 = y + h;
+ pRgn = REGION_CREATE(pWin->drawable.pScreen, &box, 1);
+ if (!pRgn)
+ return NullRegion;
+ REGION_INTERSECT( pScreen, pRgn, pRgn, &pBackingStore->SavedRegion);
+
+ if (REGION_NOTEMPTY( pScreen, pRgn))
+ {
+ /*
+ * if clearing entire window, simply make new virtual
+ * tile. For the root window, we also destroy the pixmap
+ * to save a pile of memory
+ */
+ if (x == 0 && y == 0 &&
+ w == pWin->drawable.width &&
+ h == pWin->drawable.height)
+ {
+ if (!pWin->parent)
+ miDestroyBSPixmap (pWin);
+ if (pBackingStore->status != StatusContents)
+ miTileVirtualBS (pWin);
+ }
+
+ ts_x_origin = ts_y_origin = 0;
+
+ backgroundState = pWin->backgroundState;
+ background = pWin->background;
+ if (backgroundState == ParentRelative) {
+ WindowPtr pParent;
+
+ pParent = pWin;
+ while (pParent->backgroundState == ParentRelative) {
+ ts_x_origin -= pParent->origin.x;
+ ts_y_origin -= pParent->origin.y;
+ pParent = pParent->parent;
+ }
+ backgroundState = pParent->backgroundState;
+ background = pParent->background;
+ }
+
+ if ((backgroundState != None) &&
+ ((pBackingStore->status == StatusContents) ||
+ !SameBackground (pBackingStore->backgroundState,
+ pBackingStore->background,
+ backgroundState,
+ background)))
+ {
+ if (!pBackingStore->pBackingPixmap)
+ miCreateBSPixmap(pWin, NullBox);
+
+ pGC = GetScratchGC(pWin->drawable.depth, pScreen);
+ if (pGC && pBackingStore->pBackingPixmap)
+ {
+ /*
+ * First take care of any ParentRelative stuff by altering the
+ * tile/stipple origin to match the coordinates of the upper-left
+ * corner of the first ancestor without a ParentRelative background.
+ * This coordinate is, of course, negative.
+ */
+
+ if (backgroundState == BackgroundPixel)
+ {
+ gcvalues[0] = (pointer) background.pixel;
+ gcvalues[1] = (pointer)FillSolid;
+ gcmask = GCForeground|GCFillStyle;
+ }
+ else
+ {
+ gcvalues[0] = (pointer)FillTiled;
+ gcvalues[1] = (pointer) background.pixmap;
+ gcmask = GCFillStyle|GCTile;
+ }
+ gcvalues[2] = (pointer)(ts_x_origin - pBackingStore->x);
+ gcvalues[3] = (pointer)(ts_y_origin - pBackingStore->y);
+ gcmask |= GCTileStipXOrigin|GCTileStipYOrigin;
+ DoChangeGC(pGC, gcmask, (XID *)gcvalues, TRUE);
+ ValidateGC((DrawablePtr)pBackingStore->pBackingPixmap, pGC);
+
+ /*
+ * Figure out the array of rectangles to fill and fill them with
+ * PolyFillRect in the proper mode, as set in the GC above.
+ */
+ numRects = REGION_NUM_RECTS(pRgn);
+ rects = (xRectangle *)ALLOCATE_LOCAL(numRects*sizeof(xRectangle));
+
+ if (rects)
+ {
+ for (i = 0, pBox = REGION_RECTS(pRgn);
+ i < numRects;
+ i++, pBox++)
+ {
+ rects[i].x = pBox->x1 - pBackingStore->x;
+ rects[i].y = pBox->y1 - pBackingStore->y;
+ rects[i].width = pBox->x2 - pBox->x1;
+ rects[i].height = pBox->y2 - pBox->y1;
+ }
+ (* pGC->ops->PolyFillRect) (
+ (DrawablePtr)pBackingStore->pBackingPixmap,
+ pGC, numRects, rects);
+ DEALLOCATE_LOCAL(rects);
+ }
+ FreeScratchGC(pGC);
+ }
+ }
+
+ if (!generateExposures)
+ {
+ REGION_DESTROY(pScreen, pRgn);
+ pRgn = NULL;
+ }
+ else
+ {
+ /*
+ * result must be screen relative, but is currently
+ * drawable relative.
+ */
+ REGION_TRANSLATE(pScreen, pRgn, pWin->drawable.x,
+ pWin->drawable.y);
+ }
+ }
+ else
+ {
+ REGION_DESTROY( pScreen, pRgn);
+ pRgn = NULL;
+ }
+ return pRgn;
+}
+
+static void
+miBSClearBackingRegion (pWin, pRgn)
+ WindowPtr pWin;
+ RegionPtr pRgn;
+{
+ BoxPtr pBox;
+ int i;
+
+ i = REGION_NUM_RECTS(pRgn);
+ pBox = REGION_RECTS(pRgn);
+ while (i--)
+ {
+ (void) miBSClearBackingStore(pWin, pBox->x1, pBox->y1,
+ pBox->x2 - pBox->x1,
+ pBox->y2 - pBox->y1,
+ FALSE);
+ pBox++;
+ }
+}
+
+/*
+ * fill a region of the destination with virtual bits
+ *
+ * pRgn is to be translated by (x,y)
+ */
+
+static void
+miBSFillVirtualBits (pDrawable, pGC, pRgn, x, y, state, pixunion, planeMask)
+ DrawablePtr pDrawable;
+ GCPtr pGC;
+ RegionPtr pRgn;
+ int x, y;
+ int state;
+ PixUnion pixunion;
+ unsigned long planeMask;
+{
+ int i;
+ BITS32 gcmask;
+ pointer gcval[5];
+ xRectangle *pRect;
+ BoxPtr pBox;
+ WindowPtr pWin;
+ int numRects;
+
+ if (state == None)
+ return;
+ numRects = REGION_NUM_RECTS(pRgn);
+ pRect = (xRectangle *)ALLOCATE_LOCAL(numRects * sizeof(xRectangle));
+ if (!pRect)
+ return;
+ pWin = 0;
+ if (pDrawable->type != DRAWABLE_PIXMAP)
+ {
+ pWin = (WindowPtr) pDrawable;
+ if (!pWin->backStorage)
+ pWin = 0;
+ }
+ i = 0;
+ gcmask = 0;
+ gcval[i++] = (pointer)planeMask;
+ gcmask |= GCPlaneMask;
+ if (state == BackgroundPixel)
+ {
+ if (pGC->fgPixel != pixunion.pixel)
+ {
+ gcval[i++] = (pointer)pixunion.pixel;
+ gcmask |= GCForeground;
+ }
+ if (pGC->fillStyle != FillSolid)
+ {
+ gcval[i++] = (pointer)FillSolid;
+ gcmask |= GCFillStyle;
+ }
+ }
+ else
+ {
+ if (pGC->fillStyle != FillTiled)
+ {
+ gcval[i++] = (pointer)FillTiled;
+ gcmask |= GCFillStyle;
+ }
+ if (pGC->tileIsPixel || pGC->tile.pixmap != pixunion.pixmap)
+ {
+ gcval[i++] = (pointer)pixunion.pixmap;
+ gcmask |= GCTile;
+ }
+ if (pGC->patOrg.x != x)
+ {
+ gcval[i++] = (pointer)x;
+ gcmask |= GCTileStipXOrigin;
+ }
+ if (pGC->patOrg.y != y)
+ {
+ gcval[i++] = (pointer)y;
+ gcmask |= GCTileStipYOrigin;
+ }
+ }
+ if (gcmask)
+ DoChangeGC (pGC, gcmask, (XID *)gcval, 1);
+
+ if (pWin)
+ (*pWin->drawable.pScreen->DrawGuarantee) (pWin, pGC, GuaranteeVisBack);
+
+ if (pDrawable->serialNumber != pGC->serialNumber)
+ ValidateGC (pDrawable, pGC);
+
+ pBox = REGION_RECTS(pRgn);
+ for (i = numRects; --i >= 0; pBox++, pRect++)
+ {
+ pRect->x = pBox->x1 + x;
+ pRect->y = pBox->y1 + y;
+ pRect->width = pBox->x2 - pBox->x1;
+ pRect->height = pBox->y2 - pBox->y1;
+ }
+ pRect -= numRects;
+ (*pGC->ops->PolyFillRect) (pDrawable, pGC, numRects, pRect);
+ if (pWin)
+ (*pWin->drawable.pScreen->DrawGuarantee) (pWin, pGC, GuaranteeNothing);
+ DEALLOCATE_LOCAL (pRect);
+}
+
+/*-
+ *-----------------------------------------------------------------------
+ * miBSAllocate --
+ * Create and install backing store info for a window
+ *
+ *-----------------------------------------------------------------------
+ */
+
+static void
+miBSAllocate(pWin)
+ WindowPtr pWin;
+{
+ register miBSWindowPtr pBackingStore;
+ register ScreenPtr pScreen;
+
+ if (pWin->drawable.pScreen->backingStoreSupport == NotUseful)
+ return;
+ pScreen = pWin->drawable.pScreen;
+ if (!(pBackingStore = (miBSWindowPtr)pWin->backStorage))
+ {
+
+ pBackingStore = (miBSWindowPtr)xalloc(sizeof(miBSWindowRec));
+ if (!pBackingStore)
+ return;
+
+ pBackingStore->pBackingPixmap = NullPixmap;
+ pBackingStore->x = 0;
+ pBackingStore->y = 0;
+ REGION_INIT( pScreen, &pBackingStore->SavedRegion, NullBox, 1);
+ pBackingStore->viewable = (char)pWin->viewable;
+ pBackingStore->status = StatusNoPixmap;
+ pBackingStore->backgroundState = None;
+ pWin->backStorage = (pointer) pBackingStore;
+ }
+
+ /*
+ * Now want to initialize the backing pixmap and SavedRegion if
+ * necessary. The initialization consists of finding all the
+ * currently-obscured regions, by taking the inverse of the window's
+ * clip list, storing the result in SavedRegion, and exposing those
+ * areas of the window.
+ */
+
+ if (pBackingStore->status == StatusNoPixmap &&
+ ((pWin->backingStore == WhenMapped && pWin->viewable) ||
+ (pWin->backingStore == Always)))
+ {
+ BoxRec box;
+ RegionPtr pSavedRegion;
+
+ pSavedRegion = &pBackingStore->SavedRegion;
+
+ box.x1 = pWin->drawable.x;
+ box.x2 = box.x1 + (int) pWin->drawable.width;
+ box.y1 = pWin->drawable.y;
+ box.y2 = pWin->drawable.y + (int) pWin->drawable.height;
+
+ REGION_INVERSE( pScreen, pSavedRegion, &pWin->clipList, &box);
+ REGION_TRANSLATE( pScreen, pSavedRegion,
+ -pWin->drawable.x,
+ -pWin->drawable.y);
+#ifdef SHAPE
+ if (wBoundingShape (pWin))
+ REGION_INTERSECT(pScreen, pSavedRegion, pSavedRegion,
+ wBoundingShape (pWin));
+ if (wClipShape (pWin))
+ REGION_INTERSECT(pScreen, pSavedRegion, pSavedRegion,
+ wClipShape (pWin));
+#endif
+ /* if window is already on-screen, assume it has been drawn to */
+ if (pWin->viewable)
+ pBackingStore->status = StatusVDirty;
+ miTileVirtualBS (pWin);
+
+ /*
+ * deliver all the newly available regions
+ * as exposure events to the window
+ */
+
+ miSendExposures(pWin, pSavedRegion, 0, 0);
+ }
+ else if (!pWin->viewable)
+ {
+ /*
+ * Turn off backing store when we're not supposed to
+ * be saving anything
+ */
+ if (pBackingStore->status != StatusNoPixmap)
+ {
+ REGION_EMPTY( pScreen, &pBackingStore->SavedRegion);
+ miDestroyBSPixmap (pWin);
+ }
+ }
+}
+
+/*-
+ *-----------------------------------------------------------------------
+ * miBSFree --
+ * Destroy and free all the stuff associated with the backing-store
+ * for the given window.
+ *
+ * Results:
+ * None.
+ *
+ * Side Effects:
+ * The backing pixmap and all the regions and GC's are destroyed.
+ *
+ *-----------------------------------------------------------------------
+ */
+static void
+miBSFree(pWin)
+ WindowPtr pWin;
+{
+ miBSWindowPtr pBackingStore;
+ register ScreenPtr pScreen = pWin->drawable.pScreen;
+
+ pBackingStore = (miBSWindowPtr)pWin->backStorage;
+ if (pBackingStore)
+ {
+ miDestroyBSPixmap (pWin);
+
+ REGION_UNINIT( pScreen, &pBackingStore->SavedRegion);
+
+ xfree(pBackingStore);
+ pWin->backStorage = NULL;
+ }
+}
+
+/*-
+ *-----------------------------------------------------------------------
+ * miResizeBackingStore --
+ * Alter the size of the backing pixmap as necessary when the
+ * SavedRegion changes size. The contents of the old pixmap are
+ * copied/shifted into the new/same pixmap.
+ *
+ * Results:
+ * The new Pixmap is created as necessary.
+ *
+ * Side Effects:
+ * The old pixmap is destroyed.
+ *
+ *-----------------------------------------------------------------------
+ */
+static void
+miResizeBackingStore(pWin, dx, dy, saveBits)
+ WindowPtr pWin;
+ int dx, dy; /* bits are moving this far */
+ Bool saveBits; /* bits are useful */
+{
+ miBSWindowPtr pBackingStore;
+ PixmapPtr pBackingPixmap;
+ ScreenPtr pScreen;
+ GC *pGC;
+ BoxPtr extents;
+ PixmapPtr pNewPixmap;
+ int nx, ny;
+ int nw, nh;
+
+ pBackingStore = (miBSWindowPtr)(pWin->backStorage);
+ pBackingPixmap = pBackingStore->pBackingPixmap;
+ if (!pBackingPixmap)
+ return;
+ pScreen = pWin->drawable.pScreen;
+ extents = REGION_EXTENTS(pScreen, &pBackingStore->SavedRegion);
+ pNewPixmap = pBackingPixmap;
+
+ nw = extents->x2 - extents->x1;
+ nh = extents->y2 - extents->y1;
+
+ /* the policy here could be more sophisticated */
+ if (nw != pBackingPixmap->drawable.width ||
+ nh != pBackingPixmap->drawable.height)
+ {
+ if (!saveBits)
+ {
+ pNewPixmap = NullPixmap;
+ pBackingStore->status = StatusNoPixmap;
+ }
+ else
+ {
+ pNewPixmap = (PixmapPtr)(*pScreen->CreatePixmap)
+ (pScreen,
+ nw, nh,
+ pWin->drawable.depth);
+ if (!pNewPixmap)
+ {
+#ifdef BSEAGER
+ pBackingStore->status = StatusNoPixmap;
+#else
+ pBackingStore->status = StatusBadAlloc;
+#endif
+ }
+ }
+ }
+ if (!pNewPixmap)
+ {
+ pBackingStore->x = 0;
+ pBackingStore->y = 0;
+ }
+ else
+ {
+ nx = pBackingStore->x - extents->x1 + dx;
+ ny = pBackingStore->y - extents->y1 + dy;
+ pBackingStore->x = extents->x1;
+ pBackingStore->y = extents->y1;
+
+ if (saveBits && (pNewPixmap != pBackingPixmap || nx != 0 || ny != 0))
+ {
+ pGC = GetScratchGC(pNewPixmap->drawable.depth, pScreen);
+ if (pGC)
+ {
+ ValidateGC((DrawablePtr)pNewPixmap, pGC);
+ /* if we implement a policy where the pixmap can be larger than
+ * the region extents, we might want to optimize this copyarea
+ * by only copying the old extents, rather than the entire
+ * pixmap
+ */
+ (*pGC->ops->CopyArea)((DrawablePtr)pBackingPixmap,
+ (DrawablePtr)pNewPixmap, pGC,
+ 0, 0,
+ pBackingPixmap->drawable.width,
+ pBackingPixmap->drawable.height,
+ nx, ny);
+ FreeScratchGC(pGC);
+ }
+ }
+ }
+ /* SavedRegion is used in the backingGC clip; force an update */
+ pWin->drawable.serialNumber = NEXT_SERIAL_NUMBER;
+ if (pNewPixmap != pBackingPixmap)
+ {
+ (* pScreen->DestroyPixmap)(pBackingPixmap);
+ pBackingStore->pBackingPixmap = pNewPixmap;
+ }
+}
+
+/*-
+ *-----------------------------------------------------------------------
+ * miBSSaveDoomedAreas --
+ * Saved the areas of the given window that are about to be
+ * obscured. If the window has moved, pObscured is expected to
+ * be at the new screen location and (dx,dy) is expected to be the offset
+ * to the window's previous location.
+ *
+ * Results:
+ * None.
+ *
+ * Side Effects:
+ * The region is copied from the screen into pBackingPixmap and
+ * SavedRegion is updated.
+ *
+ *-----------------------------------------------------------------------
+ */
+static void
+miBSSaveDoomedAreas(pWin, pObscured, dx, dy)
+ register WindowPtr pWin;
+ RegionPtr pObscured;
+ int dx, dy;
+{
+ miBSWindowPtr pBackingStore;
+ ScreenPtr pScreen;
+ int x, y;
+
+ pBackingStore = (miBSWindowPtr)pWin->backStorage;
+ pScreen = pWin->drawable.pScreen;
+
+ /*
+ * If the window isn't realized, it's being unmapped, thus we don't
+ * want to save anything if backingStore isn't Always.
+ */
+ if (!pWin->realized)
+ {
+ pBackingStore->viewable = (char)pWin->viewable;
+ if (pWin->backingStore != Always)
+ {
+ REGION_EMPTY( pScreen, &pBackingStore->SavedRegion);
+ miDestroyBSPixmap (pWin);
+ return;
+ }
+ if (pBackingStore->status == StatusBadAlloc)
+ pBackingStore->status = StatusNoPixmap;
+ }
+
+ /* Don't even pretend to save anything for a virtual background None */
+ if ((pBackingStore->status == StatusVirtual) &&
+ (pBackingStore->backgroundState == None))
+ return;
+
+ if (REGION_NOTEMPTY(pScreen, pObscured))
+ {
+ BoxRec oldExtents;
+ x = pWin->drawable.x;
+ y = pWin->drawable.y;
+ REGION_TRANSLATE(pScreen, pObscured, -x, -y);
+ oldExtents = *REGION_EXTENTS(pScreen, &pBackingStore->SavedRegion);
+ REGION_UNION( pScreen, &pBackingStore->SavedRegion,
+ &pBackingStore->SavedRegion,
+ pObscured);
+ /*
+ * only save the bits if we've actually
+ * started using backing store
+ */
+ if (pBackingStore->status != StatusVirtual)
+ {
+ miBSScreenPtr pScreenPriv;
+
+ pScreenPriv = (miBSScreenPtr) pScreen->devPrivates[miBSScreenIndex].ptr;
+ if (!pBackingStore->pBackingPixmap)
+ miCreateBSPixmap (pWin, &oldExtents);
+ else
+ miResizeBackingStore(pWin, 0, 0, TRUE);
+
+ if (pBackingStore->pBackingPixmap) {
+ if (pBackingStore->x | pBackingStore->y)
+ {
+ REGION_TRANSLATE( pScreen, pObscured,
+ -pBackingStore->x,
+ -pBackingStore->y);
+ x += pBackingStore->x;
+ y += pBackingStore->y;
+ }
+ (* pScreenPriv->funcs->SaveAreas) (pBackingStore->pBackingPixmap,
+ pObscured, x - dx, y - dy, pWin);
+ }
+ }
+ REGION_TRANSLATE(pScreen, pObscured, x, y);
+ }
+}
+
+/*-
+ *-----------------------------------------------------------------------
+ * miBSRestoreAreas --
+ * Restore areas from backing-store that are no longer obscured.
+ * expects prgnExposed to contain a screen-relative area.
+ *
+ * Results:
+ * The region to generate exposure events on (which may be
+ * different from the region to paint).
+ *
+ * Side Effects:
+ * Areas are copied from pBackingPixmap to the screen. prgnExposed
+ * is altered to contain the region that could not be restored from
+ * backing-store.
+ *
+ * Notes:
+ * This is called before sending any exposure events to the client,
+ * and so might be called if the window has grown. Changing the backing
+ * pixmap doesn't require revalidating the backingGC because the
+ * client's next output request will result in a call to ValidateGC,
+ * since the window clip region has changed, which will in turn call
+ * miValidateBackingStore.
+ *-----------------------------------------------------------------------
+ */
+static RegionPtr
+miBSRestoreAreas(pWin, prgnExposed)
+ register WindowPtr pWin;
+ RegionPtr prgnExposed;
+{
+ PixmapPtr pBackingPixmap;
+ miBSWindowPtr pBackingStore;
+ RegionPtr prgnSaved;
+ RegionPtr prgnRestored;
+ register ScreenPtr pScreen;
+ RegionPtr exposures = prgnExposed;
+
+ pScreen = pWin->drawable.pScreen;
+ pBackingStore = (miBSWindowPtr)pWin->backStorage;
+ pBackingPixmap = pBackingStore->pBackingPixmap;
+
+ prgnSaved = &pBackingStore->SavedRegion;
+
+ if (pBackingStore->status == StatusContents)
+ {
+ REGION_TRANSLATE(pScreen, prgnSaved, pWin->drawable.x,
+ pWin->drawable.y);
+
+ prgnRestored = REGION_CREATE( pScreen, (BoxPtr)NULL, 1);
+ REGION_INTERSECT( pScreen, prgnRestored, prgnExposed, prgnSaved);
+
+ /*
+ * Since prgnExposed is no longer obscured, we no longer
+ * will have a valid copy of it in backing-store, but there is a valid
+ * copy of it on screen, so subtract the area we just restored from
+ * from the area to be exposed.
+ */
+
+ if (REGION_NOTEMPTY( pScreen, prgnRestored))
+ {
+ miBSScreenPtr pScreenPriv;
+
+ REGION_SUBTRACT( pScreen, prgnSaved, prgnSaved, prgnExposed);
+ REGION_SUBTRACT( pScreen, prgnExposed, prgnExposed, prgnRestored);
+
+ /*
+ * Do the actual restoration
+ */
+
+ pScreenPriv = (miBSScreenPtr)
+ pScreen->devPrivates[miBSScreenIndex].ptr;
+ (* pScreenPriv->funcs->RestoreAreas) (pBackingPixmap,
+ prgnRestored,
+ pWin->drawable.x + pBackingStore->x,
+ pWin->drawable.y + pBackingStore->y, pWin);
+ /*
+ * if the saved region is completely empty, dispose of the
+ * backing pixmap, otherwise, retranslate the saved
+ * region to window relative
+ */
+
+ if (REGION_NOTEMPTY(pScreen, prgnSaved))
+ {
+ REGION_TRANSLATE(pScreen, prgnSaved,
+ -pWin->drawable.x,
+ -pWin->drawable.y);
+ miResizeBackingStore(pWin, 0, 0, TRUE);
+ }
+ else
+ miDestroyBSPixmap (pWin);
+ }
+ else
+ REGION_TRANSLATE(pScreen, prgnSaved,
+ -pWin->drawable.x, -pWin->drawable.y);
+ REGION_DESTROY( pScreen, prgnRestored);
+
+ }
+ else if ((pBackingStore->status == StatusVirtual) ||
+ (pBackingStore->status == StatusVDirty))
+ {
+ REGION_TRANSLATE(pScreen, prgnSaved,
+ pWin->drawable.x, pWin->drawable.y);
+ exposures = REGION_CREATE( pScreen, NullBox, 1);
+ if (SameBackground (pBackingStore->backgroundState,
+ pBackingStore->background,
+ pWin->backgroundState,
+ pWin->background))
+ {
+ REGION_SUBTRACT( pScreen, exposures, prgnExposed, prgnSaved);
+ }
+ else
+ {
+ miTileVirtualBS(pWin);
+
+ /* we need to expose all we have (virtually) retiled */
+ REGION_UNION( pScreen, exposures, prgnExposed, prgnSaved);
+ }
+ REGION_SUBTRACT( pScreen, prgnSaved, prgnSaved, prgnExposed);
+ REGION_TRANSLATE(pScreen, prgnSaved,
+ -pWin->drawable.x, -pWin->drawable.y);
+ }
+ else if (pWin->viewable && !pBackingStore->viewable &&
+ pWin->backingStore != Always)
+ {
+ /*
+ * The window was just mapped and nothing has been saved in
+ * backing-store from the last time it was mapped. We want to capture
+ * any output to regions that are already obscured but there are no
+ * bits to snag off the screen, so we initialize things just as we did
+ * in miBSAllocate, above.
+ */
+ BoxRec box;
+
+ prgnSaved = &pBackingStore->SavedRegion;
+
+ box.x1 = pWin->drawable.x;
+ box.x2 = box.x1 + (int) pWin->drawable.width;
+ box.y1 = pWin->drawable.y;
+ box.y2 = box.y1 + (int) pWin->drawable.height;
+
+ REGION_INVERSE( pScreen, prgnSaved, &pWin->clipList, &box);
+ REGION_TRANSLATE( pScreen, prgnSaved,
+ -pWin->drawable.x,
+ -pWin->drawable.y);
+#ifdef SHAPE
+ if (wBoundingShape (pWin))
+ REGION_INTERSECT(pScreen, prgnSaved, prgnSaved,
+ wBoundingShape (pWin));
+ if (wClipShape (pWin))
+ REGION_INTERSECT(pScreen, prgnSaved, prgnSaved,
+ wClipShape (pWin));
+#endif
+ miTileVirtualBS(pWin);
+
+ exposures = REGION_CREATE( pScreen, &box, 1);
+ }
+ pBackingStore->viewable = (char)pWin->viewable;
+ return exposures;
+}
+
+
+/*-
+ *-----------------------------------------------------------------------
+ * miBSTranslateBackingStore --
+ * Shift the backing-store in the given direction. Called when bit
+ * gravity is shifting things around.
+ *
+ * Results:
+ * An occluded region of the window which should be sent exposure events.
+ * This region should be in absolute coordinates (i.e. include
+ * new window position).
+ *
+ * Side Effects:
+ * If the window changed size as well as position, the backing pixmap
+ * is resized. The contents of the backing pixmap are shifted
+ *
+ * Warning:
+ * Bob and I have rewritten this routine quite a few times, each
+ * time it gets a few more cases correct, and introducing some
+ * interesting bugs. Naturally, I think the code is correct this
+ * time.
+ *
+ * Let me try to explain what this routine is for:
+ *
+ * It's called from SlideAndSizeWindow whenever a window
+ * with backing store is resized. There are two separate
+ * possibilities:
+ *
+ * a) The window has ForgetGravity
+ *
+ * In this case, windx, windy will be 0 and oldClip will
+ * be NULL. This indicates that all of the window contents
+ * currently saved offscreen should be discarded, and the
+ * entire window exposed. TranslateBackingStore, then, should
+ * prepare a completely new backing store region based on the
+ * new window clipList and return that region for exposure.
+ *
+ * b) The window has some other gravity
+ *
+ * In this case, windx, windy will be set to the distance
+ * that the bits should move within the window. oldClip
+ * will be set to the old visible portion of the window.
+ * TranslateBackingStore, then, should adjust the backing
+ * store to accommodate the portion of the existing backing
+ * store bits which coorespond to backing store bits which
+ * will still be occluded in the new configuration. oldx,oldy
+ * are set to the old position of the window on the screen.
+ *
+ * Furthermore, in this case any contents of the screen which
+ * are about to become occluded should be fetched from the screen
+ * and placed in backing store. This is to avoid the eventual
+ * occlusion by the win gravity shifting the child window bits around
+ * on top of this window, and potentially losing information
+ *
+ * It's also called from SetShape, but I think (he says not
+ * really knowing for sure) that this code will even work
+ * in that case.
+ *-----------------------------------------------------------------------
+ */
+
+static RegionPtr
+miBSTranslateBackingStore(pWin, windx, windy, oldClip, oldx, oldy)
+ WindowPtr pWin;
+ int windx; /* bit translation distance in window */
+ int windy;
+ RegionPtr oldClip; /* Region being copied */
+ int oldx; /* old window position */
+ int oldy;
+{
+ register miBSWindowPtr pBackingStore;
+ register RegionPtr pSavedRegion;
+ register RegionPtr newSaved, doomed;
+ register ScreenPtr pScreen;
+ BoxRec extents;
+ int scrdx; /* bit translation distance on screen */
+ int scrdy;
+ int dx; /* distance window moved on screen */
+ int dy;
+
+ pScreen = pWin->drawable.pScreen;
+ pBackingStore = (miBSWindowPtr)(pWin->backStorage);
+ if ((pBackingStore->status == StatusNoPixmap) ||
+ (pBackingStore->status == StatusBadAlloc))
+ return NullRegion;
+
+ /*
+ * Compute the new saved region
+ */
+
+ newSaved = REGION_CREATE( pScreen, NullBox, 1);
+ extents.x1 = pWin->drawable.x;
+ extents.x2 = pWin->drawable.x + (int) pWin->drawable.width;
+ extents.y1 = pWin->drawable.y;
+ extents.y2 = pWin->drawable.y + (int) pWin->drawable.height;
+ REGION_INVERSE( pScreen, newSaved, &pWin->clipList, &extents);
+
+ REGION_TRANSLATE( pScreen, newSaved,
+ -pWin->drawable.x, -pWin->drawable.y);
+#ifdef SHAPE
+ if (wBoundingShape (pWin) || wClipShape (pWin)) {
+ if (wBoundingShape (pWin))
+ REGION_INTERSECT( pScreen, newSaved, newSaved,
+ wBoundingShape (pWin));
+ if (wClipShape (pWin))
+ REGION_INTERSECT( pScreen, newSaved, newSaved, wClipShape (pWin));
+ }
+#endif
+
+ pSavedRegion = &pBackingStore->SavedRegion;
+
+ /* now find any visible areas we can save from the screen */
+ /* and then translate newSaved to old local coordinates */
+ if (oldClip)
+ {
+ /* bit gravity makes things virtually too hard, punt */
+ if (((windx != 0) || (windy != 0)) &&
+ (pBackingStore->status != StatusContents))
+ miCreateBSPixmap(pWin, NullBox);
+
+ /*
+ * The window is moving this far on the screen
+ */
+ dx = pWin->drawable.x - oldx;
+ dy = pWin->drawable.y - oldy;
+ /*
+ * The bits will be moving on the screen by the
+ * amount the window is moving + the amount the
+ * bits are moving within the window
+ */
+ scrdx = windx + dx;
+ scrdy = windy + dy;
+
+ /*
+ * intersect at old bit position to discover the
+ * bits on the screen which can be put into the
+ * new backing store
+ */
+ REGION_TRANSLATE( pScreen, oldClip, windx - oldx, windy - oldy);
+ doomed = REGION_CREATE( pScreen, NullBox, 1);
+ REGION_INTERSECT( pScreen, doomed, oldClip, newSaved);
+ REGION_TRANSLATE( pScreen, oldClip, oldx - windx, oldy - windy);
+
+ /*
+ * Translate the old saved region to the position in the
+ * window where it will appear to be
+ */
+ REGION_TRANSLATE( pScreen, pSavedRegion, windx, windy);
+
+ /*
+ * Add the old saved region to the new saved region, so
+ * that calls to RestoreAreas will be able to fetch those
+ * bits back
+ */
+ REGION_UNION( pScreen, newSaved, newSaved, pSavedRegion);
+
+ /*
+ * Swap the new saved region into the window
+ */
+ {
+ RegionRec tmp;
+
+ tmp = *pSavedRegion;
+ *pSavedRegion = *newSaved;
+ *newSaved = tmp;
+ }
+ miResizeBackingStore (pWin, windx, windy, TRUE);
+
+ /*
+ * Compute the newly enabled region
+ * of backing store. This region will be
+ * set to background in the backing pixmap and
+ * sent as exposure events to the client.
+ */
+ REGION_SUBTRACT( pScreen, newSaved, pSavedRegion, newSaved);
+
+ /*
+ * Fetch bits which will be obscured from
+ * the screen
+ */
+ if (REGION_NOTEMPTY( pScreen, doomed))
+ {
+ /*
+ * Don't clear regions which have bits on the
+ * screen
+ */
+ REGION_SUBTRACT( pScreen, newSaved, newSaved, doomed);
+
+ /*
+ * Make the region to SaveDoomedAreas absolute, instead
+ * of window relative.
+ */
+ REGION_TRANSLATE( pScreen, doomed,
+ pWin->drawable.x, pWin->drawable.y);
+ (* pScreen->SaveDoomedAreas) (pWin, doomed, scrdx, scrdy);
+ }
+
+ REGION_DESTROY(pScreen, doomed);
+
+ /*
+ * and clear whatever there is that's new
+ */
+ if (REGION_NOTEMPTY( pScreen, newSaved))
+ {
+ miBSClearBackingRegion (pWin, newSaved);
+ /*
+ * Make the exposed region absolute
+ */
+ REGION_TRANSLATE(pScreen, newSaved,
+ pWin->drawable.x,
+ pWin->drawable.y);
+ }
+ else
+ {
+ REGION_DESTROY(pScreen, newSaved);
+ newSaved = NullRegion;
+ }
+ }
+ else
+ {
+ /*
+ * ForgetGravity: just reset backing store and
+ * expose the whole mess
+ */
+ REGION_COPY( pScreen, pSavedRegion, newSaved);
+ REGION_TRANSLATE( pScreen, newSaved,
+ pWin->drawable.x, pWin->drawable.y);
+
+ miResizeBackingStore (pWin, 0, 0, FALSE);
+ (void) miBSClearBackingStore (pWin, 0, 0, 0, 0, FALSE);
+ }
+
+ return newSaved;
+}
+
+/*
+ * Inform the backing store layer that you are about to validate
+ * a gc with a window, and that subsequent output to the window
+ * is (or is not) guaranteed to be already clipped to the visible
+ * regions of the window.
+ */
+
+static void
+miBSDrawGuarantee (pWin, pGC, guarantee)
+ WindowPtr pWin;
+ GCPtr pGC;
+ int guarantee;
+{
+ miBSGCPtr pPriv;
+
+ if (pWin->backStorage)
+ {
+ pPriv = (miBSGCPtr)pGC->devPrivates[miBSGCIndex].ptr;
+ if (!pPriv)
+ (void) miBSCreateGCPrivate (pGC);
+ pPriv = (miBSGCPtr)pGC->devPrivates[miBSGCIndex].ptr;
+ if (pPriv)
+ {
+ /*
+ * XXX KLUDGE ALERT
+ *
+ * when the GC is Cheap pPriv will point
+ * at some device's gc func structure. guarantee
+ * will point at the ChangeGC entry of that struct
+ * and will never match a valid guarantee value.
+ */
+ switch (pPriv->guarantee)
+ {
+ case GuaranteeNothing:
+ case GuaranteeVisBack:
+ pPriv->guarantee = guarantee;
+ break;
+ }
+ }
+ }
+}
+
+#define noBackingCopy (GCGraphicsExposures|GCClipXOrigin|GCClipYOrigin| \
+ GCClipMask|GCSubwindowMode| \
+ GCTileStipXOrigin|GCTileStipYOrigin)
+
+/*-
+ *-----------------------------------------------------------------------
+ * miBSValidateGC --
+ * Wrapper around output-library's ValidateGC routine
+ *
+ * Results:
+ * None.
+ *
+ * Side Effects:
+ *
+ * Notes:
+ * The idea here is to perform several functions:
+ * - All the output calls must be intercepted and routed to
+ * backing-store as necessary.
+ * - pGC in the window's devBackingStore must be set up with the
+ * clip list appropriate for writing to pBackingPixmap (i.e.
+ * the inverse of the window's clipList intersected with the
+ * clientClip of the GC). Since the destination for this GC is
+ * a pixmap, it is sufficient to set the clip list as its
+ * clientClip.
+ *-----------------------------------------------------------------------
+ */
+
+static void
+miBSValidateGC (pGC, stateChanges, pDrawable)
+ GCPtr pGC;
+ unsigned long stateChanges;
+ DrawablePtr pDrawable;
+{
+ GCPtr pBackingGC;
+ miBSWindowPtr pWindowPriv;
+ miBSGCPtr pPriv;
+ WindowPtr pWin;
+ int lift_functions;
+ RegionPtr backingCompositeClip = NULL;
+
+ if (pDrawable->type != DRAWABLE_PIXMAP)
+ {
+ pWin = (WindowPtr) pDrawable;
+ pWindowPriv = (miBSWindowPtr) pWin->backStorage;
+ lift_functions = (pWindowPriv == (miBSWindowPtr) NULL);
+ }
+ else
+ {
+ pWin = (WindowPtr) NULL;
+ lift_functions = TRUE;
+ }
+
+ pPriv = (miBSGCPtr)pGC->devPrivates[miBSGCIndex].ptr;
+
+ FUNC_PROLOGUE (pGC, pPriv);
+
+ (*pGC->funcs->ValidateGC) (pGC, stateChanges, pDrawable);
+
+ /*
+ * rewrap funcs and ops as Validate may have changed them
+ */
+
+ pPriv->wrapFuncs = pGC->funcs;
+ pPriv->wrapOps = pGC->ops;
+
+ if (!lift_functions && ((pPriv->guarantee == GuaranteeVisBack) ||
+ (pWindowPriv->status == StatusNoPixmap) ||
+ (pWindowPriv->status == StatusBadAlloc)))
+ lift_functions = TRUE;
+
+ /*
+ * check to see if a new backingCompositeClip region must
+ * be generated
+ */
+
+ if (!lift_functions &&
+ ((pDrawable->serialNumber != pPriv->serialNumber) ||
+ (stateChanges&(GCClipXOrigin|GCClipYOrigin|GCClipMask|GCSubwindowMode))))
+ {
+ if (REGION_NOTEMPTY(pGC->pScreen, &pWindowPriv->SavedRegion))
+ {
+ backingCompositeClip = REGION_CREATE(pGC->pScreen, NULL, 1);
+ if ((pGC->clientClipType == CT_NONE) ||
+ (pGC->clientClipType == CT_PIXMAP))
+ {
+ REGION_COPY(pGC->pScreen, backingCompositeClip,
+ &pWindowPriv->SavedRegion);
+ }
+ else
+ {
+ /*
+ * Make a new copy of the client clip, translated to
+ * its proper origin.
+ */
+
+ REGION_COPY(pGC->pScreen, backingCompositeClip,
+ pGC->clientClip);
+ REGION_TRANSLATE(pGC->pScreen, backingCompositeClip,
+ pGC->clipOrg.x,
+ pGC->clipOrg.y);
+ REGION_INTERSECT(pGC->pScreen, backingCompositeClip,
+ backingCompositeClip,
+ &pWindowPriv->SavedRegion);
+ }
+ if (pGC->subWindowMode == IncludeInferiors)
+ {
+ RegionPtr translatedClip;
+
+ /* XXX
+ * any output in IncludeInferiors mode will not
+ * be redirected to Inferiors backing store. This
+ * can be fixed only at great cost to the shadow routines.
+ */
+ translatedClip = NotClippedByChildren (pWin);
+ REGION_TRANSLATE(pGC->pScreen, translatedClip,
+ -pDrawable->x,
+ -pDrawable->y);
+ REGION_SUBTRACT(pGC->pScreen, backingCompositeClip,
+ backingCompositeClip, translatedClip);
+ REGION_DESTROY(pGC->pScreen, translatedClip);
+ }
+ if (!REGION_NOTEMPTY(pGC->pScreen, backingCompositeClip))
+ lift_functions = TRUE;
+ }
+ else
+ {
+ lift_functions = TRUE;
+ }
+
+ /* Reset the status when drawing to an unoccluded window so that
+ * future SaveAreas will actually copy bits from the screen. Note that
+ * output to root window in IncludeInferiors mode will not cause this
+ * to change. This causes all transient graphics by the window
+ * manager to the root window to not enable backing store.
+ */
+ if (lift_functions && (pWindowPriv->status == StatusVirtual) &&
+ (pWin->parent || pGC->subWindowMode != IncludeInferiors))
+ pWindowPriv->status = StatusVDirty;
+ }
+
+ /*
+ * if no backing store has been allocated, and it's needed,
+ * create it now.
+ */
+
+ if (!lift_functions && !pWindowPriv->pBackingPixmap)
+ {
+ miCreateBSPixmap (pWin, NullBox);
+ if (!pWindowPriv->pBackingPixmap)
+ lift_functions = TRUE;
+ }
+
+ /*
+ * create the backing GC if needed, lift functions
+ * if the creation fails
+ */
+
+ if (!lift_functions && !pPriv->pBackingGC)
+ {
+ int status;
+ XID noexpose = xFalse;
+
+ /* We never want ops with the backingGC to generate GraphicsExpose */
+ pBackingGC = CreateGC ((DrawablePtr)pWindowPriv->pBackingPixmap,
+ GCGraphicsExposures, &noexpose, &status);
+ if (status != Success)
+ lift_functions = TRUE;
+ else
+ pPriv->pBackingGC = pBackingGC;
+ }
+
+ pBackingGC = pPriv->pBackingGC;
+
+ pPriv->stateChanges |= stateChanges;
+
+ if (lift_functions)
+ {
+ if (backingCompositeClip)
+ REGION_DESTROY( pGC->pScreen, backingCompositeClip);
+
+ /* unwrap the GC again */
+ miBSDestroyGCPrivate (pGC);
+
+ return;
+ }
+
+ /*
+ * the rest of this function gets the pBackingGC
+ * into shape for possible draws
+ */
+
+ pPriv->stateChanges &= ~noBackingCopy;
+ if (pPriv->stateChanges)
+ CopyGC(pGC, pBackingGC, pPriv->stateChanges);
+ if ((pGC->patOrg.x - pWindowPriv->x) != pBackingGC->patOrg.x ||
+ (pGC->patOrg.y - pWindowPriv->y) != pBackingGC->patOrg.y)
+ {
+ XID vals[2];
+ vals[0] = pGC->patOrg.x - pWindowPriv->x;
+ vals[1] = pGC->patOrg.y - pWindowPriv->y;
+ DoChangeGC(pBackingGC, GCTileStipXOrigin|GCTileStipYOrigin, vals, 0);
+ }
+ pPriv->stateChanges = 0;
+
+ if (backingCompositeClip)
+ {
+ XID vals[2];
+
+ if (pGC->clientClipType == CT_PIXMAP)
+ {
+ miBSScreenPtr pScreenPriv;
+
+ (*pBackingGC->funcs->CopyClip)(pBackingGC, pGC);
+ REGION_TRANSLATE(pGC->pScreen, backingCompositeClip,
+ -pGC->clipOrg.x, -pGC->clipOrg.y);
+ vals[0] = pGC->clipOrg.x - pWindowPriv->x;
+ vals[1] = pGC->clipOrg.y - pWindowPriv->y;
+ DoChangeGC(pBackingGC, GCClipXOrigin|GCClipYOrigin, vals, 0);
+ pScreenPriv = (miBSScreenPtr)
+ pGC->pScreen->devPrivates[miBSScreenIndex].ptr;
+ (* pScreenPriv->funcs->SetClipmaskRgn)
+ (pBackingGC, backingCompositeClip);
+ REGION_DESTROY( pGC->pScreen, backingCompositeClip);
+ }
+ else
+ {
+ vals[0] = -pWindowPriv->x;
+ vals[1] = -pWindowPriv->y;
+ DoChangeGC(pBackingGC, GCClipXOrigin|GCClipYOrigin, vals, 0);
+ (*pBackingGC->funcs->ChangeClip) (pBackingGC, CT_REGION, backingCompositeClip, 0);
+ }
+ pPriv->serialNumber = pDrawable->serialNumber;
+ }
+
+ if (pWindowPriv->pBackingPixmap->drawable.serialNumber
+ != pBackingGC->serialNumber)
+ {
+ ValidateGC((DrawablePtr)pWindowPriv->pBackingPixmap, pBackingGC);
+ }
+
+ if (pBackingGC->clientClip == 0)
+ ErrorF ("backing store clip list nil");
+
+ FUNC_EPILOGUE (pGC, pPriv);
+}
+
+static void
+miBSChangeGC (pGC, mask)
+ GCPtr pGC;
+ unsigned long mask;
+{
+ miBSGCPtr pPriv = (miBSGCPtr) (pGC)->devPrivates[miBSGCIndex].ptr;
+
+ FUNC_PROLOGUE (pGC, pPriv);
+
+ (*pGC->funcs->ChangeGC) (pGC, mask);
+
+ FUNC_EPILOGUE (pGC, pPriv);
+}
+
+static void
+miBSCopyGC (pGCSrc, mask, pGCDst)
+ GCPtr pGCSrc, pGCDst;
+ unsigned long mask;
+{
+ miBSGCPtr pPriv = (miBSGCPtr) (pGCDst)->devPrivates[miBSGCIndex].ptr;
+
+ FUNC_PROLOGUE (pGCDst, pPriv);
+
+ (*pGCDst->funcs->CopyGC) (pGCSrc, mask, pGCDst);
+
+ FUNC_EPILOGUE (pGCDst, pPriv);
+}
+
+static void
+miBSDestroyGC (pGC)
+ GCPtr pGC;
+{
+ miBSGCPtr pPriv = (miBSGCPtr) (pGC)->devPrivates[miBSGCIndex].ptr;
+
+ FUNC_PROLOGUE (pGC, pPriv);
+
+ if (pPriv->pBackingGC)
+ FreeGC(pPriv->pBackingGC, (GContext)0);
+
+ (*pGC->funcs->DestroyGC) (pGC);
+
+ FUNC_EPILOGUE (pGC, pPriv);
+
+ xfree(pPriv);
+}
+
+static void
+miBSChangeClip(pGC, type, pvalue, nrects)
+ GCPtr pGC;
+ int type;
+ pointer pvalue;
+ int nrects;
+{
+ miBSGCPtr pPriv = (miBSGCPtr) (pGC)->devPrivates[miBSGCIndex].ptr;
+
+ FUNC_PROLOGUE (pGC, pPriv);
+
+ (* pGC->funcs->ChangeClip)(pGC, type, pvalue, nrects);
+
+ FUNC_EPILOGUE (pGC, pPriv);
+}
+
+static void
+miBSCopyClip(pgcDst, pgcSrc)
+ GCPtr pgcDst, pgcSrc;
+{
+ miBSGCPtr pPriv = (miBSGCPtr) (pgcDst)->devPrivates[miBSGCIndex].ptr;
+
+ FUNC_PROLOGUE (pgcDst, pPriv);
+
+ (* pgcDst->funcs->CopyClip)(pgcDst, pgcSrc);
+
+ FUNC_EPILOGUE (pgcDst, pPriv);
+}
+
+static void
+miBSDestroyClip(pGC)
+ GCPtr pGC;
+{
+ miBSGCPtr pPriv = (miBSGCPtr) (pGC)->devPrivates[miBSGCIndex].ptr;
+
+ FUNC_PROLOGUE (pGC, pPriv);
+
+ (* pGC->funcs->DestroyClip)(pGC);
+
+ FUNC_EPILOGUE (pGC, pPriv);
+}
+
+static void
+miDestroyBSPixmap (pWin)
+ WindowPtr pWin;
+{
+ miBSWindowPtr pBackingStore;
+ ScreenPtr pScreen;
+
+ pScreen = pWin->drawable.pScreen;
+ pBackingStore = (miBSWindowPtr) pWin->backStorage;
+ if (pBackingStore->pBackingPixmap)
+ (* pScreen->DestroyPixmap)(pBackingStore->pBackingPixmap);
+ pBackingStore->pBackingPixmap = NullPixmap;
+ pBackingStore->x = 0;
+ pBackingStore->y = 0;
+ if (pBackingStore->backgroundState == BackgroundPixmap)
+ (* pScreen->DestroyPixmap)(pBackingStore->background.pixmap);
+ pBackingStore->backgroundState = None;
+ pBackingStore->status = StatusNoPixmap;
+ pWin->drawable.serialNumber = NEXT_SERIAL_NUMBER;
+}
+
+static void
+miTileVirtualBS (pWin)
+ WindowPtr pWin;
+{
+ miBSWindowPtr pBackingStore;
+
+ pBackingStore = (miBSWindowPtr) pWin->backStorage;
+ if (pBackingStore->backgroundState == BackgroundPixmap)
+ (* pWin->drawable.pScreen->DestroyPixmap)
+ (pBackingStore->background.pixmap);
+ pBackingStore->backgroundState = pWin->backgroundState;
+ pBackingStore->background = pWin->background;
+ if (pBackingStore->backgroundState == BackgroundPixmap)
+ pBackingStore->background.pixmap->refcnt++;
+
+ if (pBackingStore->status != StatusVDirty)
+ pBackingStore->status = StatusVirtual;
+
+ /*
+ * punt parent relative tiles and do it now
+ */
+ if (pBackingStore->backgroundState == ParentRelative)
+ miCreateBSPixmap (pWin, NullBox);
+}
+
+#ifdef DEBUG
+static int BSAllocationsFailed = 0;
+#define FAILEDSIZE 32
+static struct { int w, h; } failedRecord[FAILEDSIZE];
+static int failedIndex;
+#endif
+
+static void
+miCreateBSPixmap (pWin, pExtents)
+ WindowPtr pWin;
+ BoxPtr pExtents;
+{
+ miBSWindowPtr pBackingStore;
+ ScreenPtr pScreen;
+ PixUnion background;
+ char backgroundState;
+ BoxPtr extents;
+ Bool backSet;
+
+ pScreen = pWin->drawable.pScreen;
+ pBackingStore = (miBSWindowPtr) pWin->backStorage;
+ if (pBackingStore->status == StatusBadAlloc)
+ return;
+ backSet = ((pBackingStore->status == StatusVirtual) ||
+ (pBackingStore->status == StatusVDirty));
+
+ extents = REGION_EXTENTS( pScreen, &pBackingStore->SavedRegion);
+
+ if (!pBackingStore->pBackingPixmap)
+ {
+ /* the policy here could be more sophisticated */
+ pBackingStore->x = extents->x1;
+ pBackingStore->y = extents->y1;
+ pBackingStore->pBackingPixmap =
+ (PixmapPtr)(* pScreen->CreatePixmap)
+ (pScreen,
+ extents->x2 - extents->x1,
+ extents->y2 - extents->y1,
+ pWin->drawable.depth);
+ }
+ if (!pBackingStore->pBackingPixmap)
+ {
+#ifdef DEBUG
+ BSAllocationsFailed++;
+ /*
+ * record failed allocations
+ */
+ failedRecord[failedIndex].w = pWin->drawable.width;
+ failedRecord[failedIndex].h = pWin->drawable.height;
+ failedIndex++;
+ if (failedIndex == FAILEDSIZE)
+ failedIndex = 0;
+#endif
+#ifdef BSEAGER
+ pBackingStore->status = StatusNoPixmap;
+#else
+ pBackingStore->status = StatusBadAlloc;
+#endif
+ return;
+ }
+
+ pBackingStore->status = StatusContents;
+
+ if (backSet)
+ {
+ backgroundState = pWin->backgroundState;
+ background = pWin->background;
+
+ pWin->backgroundState = pBackingStore->backgroundState;
+ pWin->background = pBackingStore->background;
+ if (pWin->backgroundState == BackgroundPixmap)
+ pWin->background.pixmap->refcnt++;
+ }
+
+ if (!pExtents)
+ pExtents = extents;
+
+ if (pExtents->y1 != pExtents->y2)
+ {
+ RegionPtr exposed;
+
+ exposed = miBSClearBackingStore(pWin,
+ pExtents->x1, pExtents->y1,
+ pExtents->x2 - pExtents->x1,
+ pExtents->y2 - pExtents->y1,
+ !backSet);
+ if (exposed)
+ {
+ miSendExposures(pWin, exposed, pWin->drawable.x, pWin->drawable.y);
+ REGION_DESTROY( pScreen, exposed);
+ }
+ }
+
+ if (backSet)
+ {
+ if (pWin->backgroundState == BackgroundPixmap)
+ (* pScreen->DestroyPixmap) (pWin->background.pixmap);
+ pWin->backgroundState = backgroundState;
+ pWin->background = background;
+ if (pBackingStore->backgroundState == BackgroundPixmap)
+ (* pScreen->DestroyPixmap) (pBackingStore->background.pixmap);
+ pBackingStore->backgroundState = None;
+ }
+}
+
+/*-
+ *-----------------------------------------------------------------------
+ * miBSExposeCopy --
+ * Handle the restoration of areas exposed by graphics operations.
+ *
+ * Results:
+ * None.
+ *
+ * Side Effects:
+ * prgnExposed has the areas exposed from backing-store removed
+ * from it.
+ *
+ *-----------------------------------------------------------------------
+ */
+static void
+miBSExposeCopy (pSrc, pDst, pGC, prgnExposed, srcx, srcy, dstx, dsty, plane)
+ WindowPtr pSrc;
+ DrawablePtr pDst;
+ GCPtr pGC;
+ RegionPtr prgnExposed;
+ int srcx, srcy;
+ int dstx, dsty;
+ unsigned long plane;
+{
+ RegionRec tempRgn;
+ miBSWindowPtr pBackingStore;
+ RegionPtr (*copyProc)();
+ GCPtr pScratchGC;
+ register BoxPtr pBox;
+ register int i;
+ register int dx, dy;
+ BITS32 gcMask;
+
+ if (!REGION_NOTEMPTY(pGC->pScreen, prgnExposed))
+ return;
+ pBackingStore = (miBSWindowPtr)pSrc->backStorage;
+
+ if ((pBackingStore->status == StatusNoPixmap) ||
+ (pBackingStore->status == StatusBadAlloc))
+ return;
+
+ REGION_INIT( pGC->pScreen, &tempRgn, NullBox, 0);
+ REGION_INTERSECT( pGC->pScreen, &tempRgn, prgnExposed,
+ &pBackingStore->SavedRegion);
+ REGION_SUBTRACT( pGC->pScreen, prgnExposed, prgnExposed, &tempRgn);
+
+ if (plane != 0) {
+ copyProc = pGC->ops->CopyPlane;
+ } else {
+ copyProc = pGC->ops->CopyArea;
+ }
+
+ dx = dstx - srcx;
+ dy = dsty - srcy;
+
+ switch (pBackingStore->status) {
+ case StatusVirtual:
+ case StatusVDirty:
+ pScratchGC = GetScratchGC (pDst->depth, pDst->pScreen);
+ if (pScratchGC)
+ {
+ gcMask = 0;
+ if (pGC->alu != pScratchGC->alu)
+ gcMask = GCFunction;
+ if (pGC->planemask != pScratchGC->planemask)
+ gcMask |= GCPlaneMask;
+ if (gcMask)
+ CopyGC (pGC, pScratchGC, gcMask);
+ miBSFillVirtualBits (pDst, pScratchGC, &tempRgn, dx, dy,
+ (int) pBackingStore->backgroundState,
+ pBackingStore->background,
+ ~0L);
+ FreeScratchGC (pScratchGC);
+ }
+ break;
+ case StatusContents:
+ for (i = REGION_NUM_RECTS(&tempRgn), pBox = REGION_RECTS(&tempRgn);
+ --i >= 0;
+ pBox++)
+ {
+ (* copyProc) (pBackingStore->pBackingPixmap, pDst, pGC,
+ pBox->x1 - pBackingStore->x,
+ pBox->y1 - pBackingStore->y,
+ pBox->x2 - pBox->x1, pBox->y2 - pBox->y1,
+ pBox->x1 + dx, pBox->y1 + dy, plane);
+ }
+ break;
+ }
+ REGION_UNINIT( pGC->pScreen, &tempRgn);
+}
projects / rdpsrv / blobdiff