miexpose.c

远程桌面连接工具

	pe->u.expose.count = i;
    }
    DeliverEvents(pWin, pEvent, numRects, NullWindow);
    DEALLOCATE_LOCAL(pEvent);
}

void 
miWindowExposures(pWin, prgn, other_exposed)
    WindowPtr pWin;
    register RegionPtr prgn, other_exposed;
{
    RegionPtr   exposures = prgn;
    if (pWin->backStorage && prgn)
	/*
	 * in some cases, backing store will cause a different
	 * region to be exposed than needs to be repainted
	 * (like when a window is mapped).  RestoreAreas is
	 * allowed to return a region other than prgn,
	 * in which case this routine will free the resultant
	 * region.  If exposures is null, then no events will
	 * be sent to the client; if prgn is empty
	 * no areas will be repainted.
	 */
	exposures = (*pWin->drawable.pScreen->RestoreAreas)(pWin, prgn);
    if ((prgn && !REGION_NIL(prgn)) || 
	(exposures && !REGION_NIL(exposures)) || other_exposed)
    {
	RegionRec   expRec;
	int	    clientInterested;

	/*
	 * Restore from backing-store FIRST.
	 */
	clientInterested = (pWin->eventMask|wOtherEventMasks(pWin)) & ExposureMask;
	if (other_exposed)
	{
	    if (exposures)
	    {
		REGION_UNION(pWin->drawable.pScreen, other_exposed,
						  exposures,
					          other_exposed);
		if (exposures != prgn)
		    REGION_DESTROY(pWin->drawable.pScreen, exposures);
	    }
	    exposures = other_exposed;
	}
	if (clientInterested && exposures && (REGION_NUM_RECTS(exposures) > RECTLIMIT))
	{
	    /*
	     * If we have LOTS of rectangles, we decide to take the extents
	     * and force an exposure on that.  This should require much less
	     * work overall, on both client and server.  This is cheating, but
	     * isn't prohibited by the protocol ("spontaneous combustion" :-).
	     */
	    BoxRec box;

	    box = *REGION_EXTENTS( pWin->drawable.pScreen, exposures);
	    if (exposures == prgn) {
		exposures = &expRec;
		REGION_INIT( pWin->drawable.pScreen, exposures, &box, 1);
		REGION_RESET( pWin->drawable.pScreen, prgn, &box);
	    } else {
		REGION_RESET( pWin->drawable.pScreen, exposures, &box);
		REGION_UNION( pWin->drawable.pScreen, prgn, prgn, exposures);
	    }
	    /* PaintWindowBackground doesn't clip, so we have to */
	    REGION_INTERSECT( pWin->drawable.pScreen, prgn, prgn, &pWin->clipList);
	    /* need to clear out new areas of backing store, too */
	    if (pWin->backStorage)
		(void) (* pWin->drawable.pScreen->ClearBackingStore)(
					     pWin,
					     box.x1 - pWin->drawable.x,
					     box.y1 - pWin->drawable.y,
					     box.x2 - box.x1,
					     box.y2 - box.y1,
					     FALSE);
	}
	if (prgn && !REGION_NIL(prgn))
	    (*pWin->drawable.pScreen->PaintWindowBackground)(pWin, prgn, PW_BACKGROUND);
	if (clientInterested && exposures && !REGION_NIL(exposures))
	    miSendExposures(pWin, exposures,
			    pWin->drawable.x, pWin->drawable.y);
	if (exposures == &expRec)
	{
	    REGION_UNINIT( pWin->drawable.pScreen, exposures);
	}
	else if (exposures && exposures != prgn && exposures != other_exposed)
	    REGION_DESTROY( pWin->drawable.pScreen, exposures);
	if (prgn)
	    REGION_EMPTY( pWin->drawable.pScreen, prgn);
    }
    else if (exposures && exposures != prgn)
	REGION_DESTROY( pWin->drawable.pScreen, exposures);
}


/*
    this code is highly unlikely.  it is not haile selassie.

    there is some hair here.  we can't just use the window's
clip region as it is, because if we are painting the border,
the border is not in the client area and so we will be excluded
when we validate the GC, and if we are painting a parent-relative
background, the area we want to paint is in some other window.
since we trust the code calling us to tell us to paint only areas
that are really ours, we will temporarily give the window a
clipList the size of the whole screen and an origin at (0,0).
this more or less assumes that ddX code will do translation
based on the window's absolute position, and that ValidateGC will
look at clipList, and that no other fields from the
window will be used.  it's not possible to just draw
in the root because it may be a different depth.

to get the tile to align correctly we set the GC's tile origin to
be the (x,y) of the window's upper left corner, after which we
get the right bits when drawing into the root.

because the clip_mask is being set to None, we may call DoChangeGC with
fPointer set true, thus we no longer need to install the background or
border tile in the resource table.
*/

static RESTYPE ResType = 0;
static int numGCs = 0;
static GCPtr	screenContext[MAXSCREENS];

/*ARGSUSED*/
static int
tossGC (value, id)
pointer value;
XID id;
{
    GCPtr pGC = (GCPtr)value;
    screenContext[pGC->pScreen->myNum] = (GCPtr)NULL;
    FreeGC (pGC, id);
    numGCs--;
    if (!numGCs)
	ResType = 0;

    return 0;
}


void
miPaintWindow(pWin, prgn, what)
register WindowPtr pWin;
RegionPtr prgn;
int what;
{
    int	status;

    Bool usingScratchGC = FALSE;
    WindowPtr pRoot;
	
#define FUNCTION	0
#define FOREGROUND	1
#define TILE		2
#define FILLSTYLE	3
#define ABSX		4
#define ABSY		5
#define CLIPMASK	6
#define SUBWINDOW	7
#define COUNT_BITS	8

    ChangeGCVal gcval[7];
    ChangeGCVal newValues [COUNT_BITS];

    BITS32 gcmask, index, mask;
    RegionRec prgnWin;
    DDXPointRec oldCorner;
    BoxRec box;
    WindowPtr	pBgWin;
    GCPtr pGC;
    register int i;
    register BoxPtr pbox;
    register ScreenPtr pScreen = pWin->drawable.pScreen;
    register xRectangle *prect;
    int numRects;

    gcmask = 0;

    if (what == PW_BACKGROUND)
    {
	switch (pWin->backgroundState) {
	case None:
	    return;
	case ParentRelative:
	    (*pWin->parent->drawable.pScreen->PaintWindowBackground)(pWin->parent, prgn, what);
	    return;
	case BackgroundPixel:
	    newValues[FOREGROUND].val = pWin->background.pixel;
	    newValues[FILLSTYLE].val  = FillSolid;
	    gcmask |= GCForeground | GCFillStyle;
	    break;
	case BackgroundPixmap:
	    newValues[TILE].ptr = (pointer)pWin->background.pixmap;
	    newValues[FILLSTYLE].val = FillTiled;
	    gcmask |= GCTile | GCFillStyle | GCTileStipXOrigin | GCTileStipYOrigin;
	    break;
	}
    }
    else
    {
	if (pWin->borderIsPixel)
	{
	    newValues[FOREGROUND].val = pWin->border.pixel;
	    newValues[FILLSTYLE].val  = FillSolid;
	    gcmask |= GCForeground | GCFillStyle;
	}
	else
	{
	    newValues[TILE].ptr = (pointer)pWin->border.pixmap;
	    newValues[FILLSTYLE].val = FillTiled;
	    gcmask |= GCTile | GCFillStyle | GCTileStipXOrigin | GCTileStipYOrigin;
	}
    }

    prect = (xRectangle *)ALLOCATE_LOCAL(REGION_NUM_RECTS(prgn) *
					 sizeof(xRectangle));
    if (!prect)
	return;

    newValues[FUNCTION].val = GXcopy;
    gcmask |= GCFunction | GCClipMask;

    i = pScreen->myNum;
    pRoot = WindowTable[i];

    pBgWin = pWin;
    if (what == PW_BORDER)
    {
	while (pBgWin->backgroundState == ParentRelative)
	    pBgWin = pBgWin->parent;
    }

    if ((pWin->drawable.depth != pRoot->drawable.depth) ||
	(pWin->drawable.bitsPerPixel != pRoot->drawable.bitsPerPixel))
    {
	usingScratchGC = TRUE;
	pGC = GetScratchGC(pWin->drawable.depth, pWin->drawable.pScreen);
	if (!pGC)
	{
	    DEALLOCATE_LOCAL(prect);
	    return;
	}
	/*
	 * mash the clip list so we can paint the border by
	 * mangling the window in place, pretending it
	 * spans the entire screen
	 */
	if (what == PW_BORDER)
	{
	    prgnWin = pWin->clipList;
	    oldCorner.x = pWin->drawable.x;
	    oldCorner.y = pWin->drawable.y;
	    pWin->drawable.x = pWin->drawable.y = 0;
	    box.x1 = 0;
	    box.y1 = 0;
	    box.x2 = pScreen->width;
	    box.y2 = pScreen->height;
	    REGION_INIT(pScreen, &pWin->clipList, &box, 1);
	    pWin->drawable.serialNumber = NEXT_SERIAL_NUMBER;
	    newValues[ABSX].val = pBgWin->drawable.x;
	    newValues[ABSY].val = pBgWin->drawable.y;
	}
	else
	{
	    newValues[ABSX].val = 0;
	    newValues[ABSY].val = 0;
	}
    } else {
	/*
	 * draw the background to the root window
	 */
	if (screenContext[i] == (GCPtr)NULL)
	{
	    if (!ResType && !(ResType = CreateNewResourceType(tossGC)))
		return;
	    screenContext[i] = CreateGC((DrawablePtr)pWin, (BITS32) 0,
					(XID *)NULL, &status);
	    if (!screenContext[i])
		return;
	    numGCs++;
	    if (!AddResource(FakeClientID(0), ResType,
			     (pointer)screenContext[i]))
	        return;
	}
	pGC = screenContext[i];
	newValues[SUBWINDOW].val = IncludeInferiors;
	newValues[ABSX].val = pBgWin->drawable.x;
	newValues[ABSY].val = pBgWin->drawable.y;
	gcmask |= GCSubwindowMode;
	pWin = pRoot;
    }
    
    if (pWin->backStorage)
	(*pWin->drawable.pScreen->DrawGuarantee) (pWin, pGC, GuaranteeVisBack);

    mask = gcmask;
    gcmask = 0;
    i = 0;
    while (mask) {
    	index = lowbit (mask);
	mask &= ~index;
	switch (index) {
	case GCFunction:
	    if (pGC->alu != newValues[FUNCTION].val) {
		gcmask |= index;
		gcval[i++].val = newValues[FUNCTION].val;
	    }
	    break;
	case GCTileStipXOrigin:
	    if ( pGC->patOrg.x != newValues[ABSX].val) {
		gcmask |= index;
		gcval[i++].val = newValues[ABSX].val;
	    }
	    break;
	case GCTileStipYOrigin:
	    if ( pGC->patOrg.y != newValues[ABSY].val) {
		gcmask |= index;
		gcval[i++].val = newValues[ABSY].val;
	    }
	    break;
	case GCClipMask:
	    if ( pGC->clientClipType != CT_NONE) {
		gcmask |= index;
		gcval[i++].val = CT_NONE;
	    }
	    break;
	case GCSubwindowMode:
	    if ( pGC->subWindowMode != newValues[SUBWINDOW].val) {
		gcmask |= index;
		gcval[i++].val = newValues[SUBWINDOW].val;
	    }
	    break;
	case GCTile:
	    if (pGC->tileIsPixel || pGC->tile.pixmap != newValues[TILE].ptr)
 	    {
		gcmask |= index;
		gcval[i++].ptr = newValues[TILE].ptr;
	    }
	    break;
	case GCFillStyle:
	    if ( pGC->fillStyle != newValues[FILLSTYLE].val) {
		gcmask |= index;
		gcval[i++].val = newValues[FILLSTYLE].val;
	    }
	    break;
	case GCForeground:
	    if ( pGC->fgPixel != newValues[FOREGROUND].val) {
		gcmask |= index;
		gcval[i++].val = newValues[FOREGROUND].val;
	    }
	    break;
	}
    }

    if (gcmask)
        dixChangeGC(NullClient, pGC, gcmask, NULL, gcval);

    if (pWin->drawable.serialNumber != pGC->serialNumber)
	ValidateGC((DrawablePtr)pWin, pGC);

    numRects = REGION_NUM_RECTS(prgn);
    pbox = REGION_RECTS(prgn);
    for (i= numRects; --i >= 0; pbox++, prect++)
    {
	prect->x = pbox->x1 - pWin->drawable.x;
	prect->y = pbox->y1 - pWin->drawable.y;
	prect->width = pbox->x2 - pbox->x1;
	prect->height = pbox->y2 - pbox->y1;
    }
    prect -= numRects;
    (*pGC->ops->PolyFillRect)((DrawablePtr)pWin, pGC, numRects, prect);
    DEALLOCATE_LOCAL(prect);

    if (pWin->backStorage)
	(*pWin->drawable.pScreen->DrawGuarantee) (pWin, pGC, GuaranteeNothing);

    if (usingScratchGC)
    {
	if (what == PW_BORDER)
	{
	    REGION_UNINIT(pScreen, &pWin->clipList);
	    pWin->clipList = prgnWin;
	    pWin->drawable.x = oldCorner.x;
	    pWin->drawable.y = oldCorner.y;
	    pWin->drawable.serialNumber = NEXT_SERIAL_NUMBER;
	}
	FreeScratchGC(pGC);
    }
}


/* MICLEARDRAWABLE -- sets the entire drawable to the background color of
 * the GC.  Useful when we have a scratch drawable and need to initialize 
 * it. */
miClearDrawable(pDraw, pGC)
    DrawablePtr	pDraw;
    GCPtr	pGC;
{
    XID fg = pGC->fgPixel;
    XID bg = pGC->bgPixel;
    xRectangle rect;

    rect.x = 0;
    rect.y = 0;
    rect.width = pDraw->width;
    rect.height = pDraw->height;
    DoChangeGC(pGC, GCForeground, &bg, 0);
    ValidateGC(pDraw, pGC);
    (*pGC->ops->PolyFillRect)(pDraw, pGC, 1, &rect);
    DoChangeGC(pGC, GCForeground, &fg, 0);
    ValidateGC(pDraw, pGC);
}