diff options
Diffstat (limited to 'mi/mibstore.c')
| -rw-r--r-- | mi/mibstore.c | 3902 |
1 files changed, 35 insertions, 3867 deletions
diff --git a/mi/mibstore.c b/mi/mibstore.c index e27c681e8..294b2caee 100644 --- a/mi/mibstore.c +++ b/mi/mibstore.c @@ -1,3880 +1,48 @@ -/*********************************************************** - -Copyright 1987, 1998 The Open Group - -Permission to use, copy, modify, distribute, and sell this software and its -documentation for any purpose is hereby granted without fee, provided that -the above copyright notice appear in all copies and that both that -copyright notice and this permission notice appear in supporting -documentation. - -The above copyright notice and this permission notice shall be included in -all copies or substantial portions of the Software. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN -AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN -CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - -Except as contained in this notice, the name of The Open Group shall not be -used in advertising or otherwise to promote the sale, use or other dealings -in this Software without prior written authorization from The Open Group. - - -Copyright 1987 by 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 The Open Group 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 -#ifdef HAVE_DIX_CONFIG_H -#include <dix-config.h> -#endif - -#include <X11/X.h> -#include <X11/Xmd.h> -#include <X11/Xproto.h> -#include "misc.h" -#include "regionstr.h" -#include "scrnintstr.h" -#include "gcstruct.h" -#include "windowstr.h" -#include "pixmapstr.h" -#include <X11/fonts/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(WindowPtr pWin, BoxPtr pExtents); -static void miDestroyBSPixmap(WindowPtr pWin); -static void miTileVirtualBS(WindowPtr pWin); -static void miBSAllocate(WindowPtr pWin), miBSFree(WindowPtr pWin); -static Bool miBSCreateGCPrivate(GCPtr pGC); -static void miBSClearBackingRegion(WindowPtr pWin, RegionPtr pRgn); - -#define MoreCopy0 ; -#define MoreCopy2 *dstCopy++ = *srcCopy++; *dstCopy++ = *srcCopy++; -#define MoreCopy4 MoreCopy2 MoreCopy2 - -#define copyData(src,dst,n,morecopy) \ -{ \ - short *srcCopy = (short *)(src); \ - short *dstCopy = (short *)(dst); \ - int i; \ - int bsx = pBackingStore->x; \ - 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(int i, ScreenPtr pScreen); -static void miBSGetImage(DrawablePtr pDrawable, int sx, int sy, - int w, int h, unsigned int format, - unsigned long planemask, char *pdstLine); -static void miBSGetSpans(DrawablePtr pDrawable, int wMax, - DDXPointPtr ppt, int *pwidth, int nspans, - char *pdstStart); -static Bool miBSChangeWindowAttributes(WindowPtr pWin, - unsigned long mask); -static Bool miBSCreateGC(GCPtr pGC); -static Bool miBSDestroyWindow(WindowPtr pWin); - -/* - * backing store screen functions - */ - -static void miBSSaveDoomedAreas(WindowPtr pWin, RegionPtr pObscured, - int dx, int dy); -static RegionPtr miBSRestoreAreas(WindowPtr pWin, RegionPtr prgnExposed); -static void miBSExposeCopy(WindowPtr pSrc, DrawablePtr pDst, - GCPtr pGC, RegionPtr prgnExposed, - int srcx, int srcy, int dstx, int dsty, - unsigned long plane); -static RegionPtr miBSTranslateBackingStore(WindowPtr pWin, int windx, - int windy, RegionPtr oldClip, - int oldx, int oldy); -static RegionPtr miBSClearBackingStore(WindowPtr pWin, int x, int y, - int w, int h, Bool generateExposures); -static void miBSDrawGuarantee(WindowPtr pWin, GCPtr pGC, - int guarantee); - -/* - * wrapper vectors for GC funcs and ops - */ - -static int miBSGCIndex; - -static void miBSValidateGC(GCPtr pGC, unsigned long stateChanges, - DrawablePtr pDrawable); -static void miBSCopyGC(GCPtr pGCSrc, unsigned long mask, GCPtr pGCDst); -static void miBSDestroyGC(GCPtr pGC); -static void miBSChangeGC(GCPtr pGC, unsigned long mask); -static void miBSChangeClip(GCPtr pGC, int type, pointer pvalue, int nrects); -static void miBSDestroyClip(GCPtr pGC); -static void miBSCopyClip(GCPtr pgcDst, GCPtr pgcSrc); - -static GCFuncs miBSGCFuncs = { - miBSValidateGC, - miBSChangeGC, - miBSCopyGC, - miBSDestroyGC, - miBSChangeClip, - miBSDestroyClip, - miBSCopyClip, -}; - -static void miBSFillSpans(DrawablePtr pDrawable, GCPtr pGC, int nInit, - DDXPointPtr pptInit, int *pwidthInit, - int fSorted); -static void miBSSetSpans(DrawablePtr pDrawable, GCPtr pGC, char *psrc, - DDXPointPtr ppt, int *pwidth, int nspans, - int fSorted); -static void miBSPutImage(DrawablePtr pDrawable, GCPtr pGC, int depth, - int x, int y, int w, int h, int leftPad, - int format, char *pBits); -static RegionPtr miBSCopyArea(DrawablePtr pSrc, DrawablePtr pDst, - GCPtr pGC, int srcx, int srcy, int w, int h, - int dstx, int dsty); -static RegionPtr miBSCopyPlane(DrawablePtr pSrc, DrawablePtr pDst, - GCPtr pGC, int srcx, int srcy, int w, int h, - int dstx, int dsty, unsigned long plane); -static void miBSPolyPoint(DrawablePtr pDrawable, GCPtr pGC, int mode, - int npt, xPoint *pptInit); -static void miBSPolylines(DrawablePtr pDrawable, GCPtr pGC, int mode, - int npt, DDXPointPtr pptInit); -static void miBSPolySegment(DrawablePtr pDrawable, GCPtr pGC, int nseg, - xSegment *pSegs); -static void miBSPolyRectangle(DrawablePtr pDrawable, GCPtr pGC, - int nrects, xRectangle *pRects); -static void miBSPolyArc(DrawablePtr pDrawable, GCPtr pGC, int narcs, - xArc *parcs); -static void miBSFillPolygon(DrawablePtr pDrawable, GCPtr pGC, - int shape, int mode, int count, - DDXPointPtr pPts); -static void miBSPolyFillRect(DrawablePtr pDrawable, GCPtr pGC, - int nrectFill, xRectangle *prectInit); -static void miBSPolyFillArc(DrawablePtr pDrawable, GCPtr pGC, - int narcs, xArc *parcs); -static int miBSPolyText8(DrawablePtr pDrawable, GCPtr pGC, - int x, int y, int count, char *chars); -static int miBSPolyText16(DrawablePtr pDrawable, GCPtr pGC, - int x, int y, int count, - unsigned short *chars); -static void miBSImageText8(DrawablePtr pDrawable, GCPtr pGC, - int x, int y, int count, char *chars); -static void miBSImageText16(DrawablePtr pDrawable, GCPtr pGC, - int x, int y, int count, - unsigned short *chars); -static void miBSImageGlyphBlt(DrawablePtr pDrawable, GCPtr pGC, - int x, int y, unsigned int nglyph, - CharInfoPtr *ppci, pointer pglyphBase); -static void miBSPolyGlyphBlt(DrawablePtr pDrawable, GCPtr pGC, - int x, int y, unsigned int nglyph, - CharInfoPtr *ppci, pointer pglyphBase); -static void miBSPushPixels(GCPtr pGC, PixmapPtr pBitMap, - DrawablePtr pDst, int w, int h, - int x, int y); - -static GCOps miBSGCOps = { - miBSFillSpans, miBSSetSpans, miBSPutImage, - miBSCopyArea, miBSCopyPlane, miBSPolyPoint, - miBSPolylines, miBSPolySegment, miBSPolyRectangle, - miBSPolyArc, miBSFillPolygon, miBSPolyFillRect, - miBSPolyFillArc, miBSPolyText8, miBSPolyText16, - miBSImageText8, miBSImageText16, miBSImageGlyphBlt, - miBSPolyGlyphBlt, miBSPushPixels -}; - -#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(GCPtr pGC, unsigned long stateChanges, - DrawablePtr pDrawable); -static void miBSCheapCopyGC(GCPtr pGCSrc, unsigned long mask, GCPtr pGCDst); -static void miBSCheapDestroyGC(GCPtr pGC); -static void miBSCheapChangeGC(GCPtr pGC, unsigned long mask); -static void miBSCheapChangeClip(GCPtr pGC, int type, pointer pvalue, - int nrects); -static void miBSCheapDestroyClip(GCPtr pGC); -static void miBSCheapCopyClip(GCPtr pgcDst, GCPtr pgcSrc); - -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. pScreen->BackingStoreFuncs - * must be previously initialized. - */ - -_X_EXPORT void -miInitializeBackingStore (pScreen) - ScreenPtr pScreen; -{ - 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; - - 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(DrawablePtr pDrawable, GCPtr pGC, - RegionPtr pRgn, int x, int y, int state, - PixUnion pixunion, unsigned long planemask); - -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 = NULL; - 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_NULL(pScreen, &Border); - REGION_NULL(pScreen, &Inside); - 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 (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; - 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); -} - -typedef RegionPtr (* CopyAreaProcPtr)(DrawablePtr, DrawablePtr, GCPtr, - int, int, int, int, int, int); -typedef RegionPtr (* CopyPlaneProcPtr)(DrawablePtr, DrawablePtr, GCPtr, - int, int, int, int, int, int, - unsigned long bitPlane); -/*- - *----------------------------------------------------------------------- - * 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( - 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) */ - CopyPlaneProcPtr 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 */ - int i, j, k, l, y; - BoxPtr pBox; - int dx, dy, nrects; - Bool graphicsExposures; - CopyPlaneProcPtr pixCopyProc; - int numRectsExp, numRectsObs; - BoxPtr pBoxExp, pBoxObs; - - SETUP_BACKING (pWin, pGC); - (void)oldFuncs; - - /* - * 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 = (CopyPlaneProcPtr)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->drawable), 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->drawable), 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->drawable), &(pWin->drawable), 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, (CopyPlaneProcPtr)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; - 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; - GCPtr pGC; - int shape, mode; - 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); -} - -/*- - *----------------------------------------------------------------------- - * 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)(long)(ts_x_origin - pBackingStore->x); - gcvalues[3] = (pointer)(long)(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)(long)x; - gcmask |= GCTileStipXOrigin; - } - if (pGC->patOrg.y != y) - { - gcval[i++] = (pointer)(long)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; -{ - miBSWindowPtr pBackingStore; - 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_NULL( pScreen, &pBackingStore->SavedRegion); - 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; - ScreenPtr pScreen; - - 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( - WindowPtr pWin, - int dx, /* bits are moving this far */ - int 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 || !nw || !nh) - { - 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) - 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) - { - 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; - } - (* pScreen->BackingStoreFuncs.SaveAreas) - (pBackingStore->pBackingPixmap, pObscured, - x - dx, y - dy, pWin); - } - } - REGION_TRANSLATE(pScreen, pObscured, x, y); - } - else - { - if (REGION_BROKEN (pScreen, pObscured)) - { - REGION_EMPTY( pScreen, &pBackingStore->SavedRegion); - miDestroyBSPixmap (pWin); - return; - } - } -} - -/*- - *----------------------------------------------------------------------- - * 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) - WindowPtr pWin; - RegionPtr prgnExposed; -{ - PixmapPtr pBackingPixmap; - miBSWindowPtr pBackingStore; - RegionPtr prgnSaved; - RegionPtr prgnRestored; - 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)) - { - REGION_SUBTRACT( pScreen, prgnSaved, prgnSaved, prgnExposed); - REGION_SUBTRACT( pScreen, prgnExposed, prgnExposed, prgnRestored); - - /* - * Do the actual restoration - */ - (* pScreen->BackingStoreFuncs.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: + * Copyright 2007 Red Hat, Inc. * - * It's called from SlideAndSizeWindow whenever a window - * with backing store is resized. There are two separate - * possibilities: + * 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 + * on the rights to use, copy, modify, merge, publish, distribute, sub + * license, and/or sell copies of the Software, and to permit persons to whom + * them Software is furnished to do so, subject to the following conditions: * - * a) The window has ForgetGravity + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. * - * 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. - *----------------------------------------------------------------------- + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTIBILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS 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. */ -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; -{ - miBSWindowPtr pBackingStore; - RegionPtr pSavedRegion; - RegionPtr newSaved, doomed; - 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)); - } +#ifdef HAVE_DIX_CONFIG_H +#include <dix-config.h> #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; -} +#include "scrnintstr.h" +#include "mibstore.h" /* - * 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 + * There is no longer an mi implementation of backing store. This function + * is only for source compatibility with old drivers. * - * 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. - *----------------------------------------------------------------------- + * Note though that you do get backing store for free if your server has + * Composite enabled, since the automatic redirection mechanism provides + * essentially the same functionality. See compChangeWindowAttributes() + * for the implementation. */ -static void -miBSValidateGC (pGC, stateChanges, pDrawable) - GCPtr pGC; - unsigned long stateChanges; - DrawablePtr pDrawable; -{ - GCPtr pBackingGC; - miBSWindowPtr pWindowPriv = NULL; - 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, - (XID)0, serverClient); - 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) - { - (*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); - (* pGC->pScreen->BackingStoreFuncs.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 = 0; - 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 && - extents->x2 != extents->x1 && - extents->y2 != extents->y1) - { - /* 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; - CopyPlaneProcPtr copyProc; - GCPtr pScratchGC; - BoxPtr pBox; - int i; - 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_NULL( pGC->pScreen, &tempRgn); - REGION_INTERSECT( pGC->pScreen, &tempRgn, prgnExposed, - &pBackingStore->SavedRegion); - REGION_SUBTRACT( pGC->pScreen, prgnExposed, prgnExposed, &tempRgn); - - if (plane != 0) { - copyProc = pGC->ops->CopyPlane; - } else { - copyProc = (CopyPlaneProcPtr)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->drawable), 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); +_X_EXPORT void +miInitializeBackingStore (ScreenPtr pScreen) +{ + pScreen->SaveDoomedAreas = NULL; + pScreen->RestoreAreas = NULL; + pScreen->ExposeCopy = NULL; + pScreen->TranslateBackingStore = NULL; + pScreen->ClearBackingStore = NULL; + pScreen->DrawGuarantee = NULL; } |