mbufpx.c

远程桌面连接工具

	    {
		r.x = r.y = 0;
		r.width  = pWin->drawable.width;
		r.height = pWin->drawable.height;
		MultibufferPaintBackgroundRectangles(pWin, (DrawablePtr)pWin,
						     1, &r);
	    }
	}
	else /* different buffer is being displayed */
	{
	    /* perform update action */

	    switch (ppMBWindow[i]->updateAction)
	    {
	    case MultibufferUpdateActionUndefined:
		break;

	    case MultibufferUpdateActionBackground:

		r.x = r.y = 0;
		r.width  = pPrevPixmap->drawable.width;
		r.height = pPrevPixmap->drawable.height;
		MultibufferPaintBackgroundRectangles(pWin,
						     (DrawablePtr)pPrevPixmap,
						     1, &r);
		break;

	    case MultibufferUpdateActionUntouched:
		
		/* copy the window to the pixmap that represents the
		 * currently displayed buffer
		 */

		if (pPrevMBBuffer->eventMask & ExposureMask)
		{
		    bool = TRUE;
		    DoChangeGC (pGC, GCGraphicsExposures, &bool, FALSE);
		}
		ValidateGC ((DrawablePtr)pPrevPixmap, pGC);
		pExposed = (*pGC->ops->CopyArea)((DrawablePtr) pWin,
						 (DrawablePtr) pPrevPixmap,
						 pGC,
						 0, 0,
						 pWin->drawable.width,
						 pWin->drawable.height,
						 0, 0);

		/* if we couldn't copy the whole window to the buffer,
		 * send expose events (if any client wants them)
		 */

		if (pPrevMBBuffer->eventMask & ExposureMask)
		{ /* some client wants expose events */
		    if (pExposed)
		    {
			RegionPtr	 pWinSize;
			extern RegionPtr CreateUnclippedWinSize();
			ScreenPtr pScreen = pWin->drawable.pScreen;
			pWinSize = CreateUnclippedWinSize (pWin);
			/*
			 * pExposed is window-relative, but at this point
			 * pWinSize is screen-relative.  Make pWinSize be
			 * window-relative so that region ops involving
			 * pExposed and pWinSize behave sensibly.
			 */
			REGION_TRANSLATE(pScreen, pWinSize,
						     -pWin->drawable.x,
						     -pWin->drawable.y);
			REGION_INTERSECT(pScreen, pExposed, pExposed, pWinSize);
			REGION_DESTROY(pScreen, pWinSize);
			MultibufferExpose (pPrevMBBuffer, pExposed);
			REGION_DESTROY(pScreen, pExposed);
		    }
		    bool = FALSE;
		    DoChangeGC (pGC, GCGraphicsExposures, &bool, FALSE);
		} /* end some client wants expose events */

		break; /* end case MultibufferUpdateActionUntouched */

	    case MultibufferUpdateActionCopied:

		ValidateGC ((DrawablePtr)pPrevPixmap, pGC);
		(*pGC->ops->CopyArea) ((DrawablePtr)pNewPixmap,
				       (DrawablePtr)pPrevPixmap, pGC,
				       0, 0, pWin->drawable.width,
				       pWin->drawable.height, 0, 0);
		break;

	    } /* end switch on update action */

	    /* display the new buffer */

	    ValidateGC ((DrawablePtr)pWin, pGC);
	    (*pGC->ops->CopyArea) ((DrawablePtr)pNewPixmap, (DrawablePtr)pWin,
				   pGC, 0, 0,
				   pWin->drawable.width, pWin->drawable.height,
				   0, 0);
	}

	ppMBWindow[i]->lastUpdate = currentTime;
    }

    if (pGC) FreeScratchGC (pGC);
    return;
}

/*
 * resize the buffers when the window is resized
 */ 

static Bool
pixPositionWindow (pWin, x, y)
    WindowPtr	pWin;
    int		x, y;
{
    ScreenPtr	    pScreen;
    mbufPixmapPrivPtr pMBPriv;
    mbufWindowPtr   pMBWindow;
    mbufBufferPtr   pMBBuffer;
    int		    width, height;
    int		    i;
    int		    dx, dy, dw, dh;
    int		    sourcex, sourcey;
    int		    destx, desty;
    PixmapPtr	    pPixmap;
    GCPtr	    pGC;
    int		    savewidth, saveheight;
    Bool	    clear;
    RegionRec       exposedRegion;
    Bool	    ret;

    pScreen = pWin->drawable.pScreen;
    pMBPriv = MB_SCREEN_PRIV_PIXMAP(pScreen);

    UNWRAP_SCREEN_FUNC(pScreen, pMBPriv, Bool, PositionWindow);
    ret = (* pScreen->PositionWindow) (pWin, x, y);
    REWRAP_SCREEN_FUNC(pScreen, pMBPriv, Bool, PositionWindow);

    if (!(pMBWindow = MB_WINDOW_PRIV(pWin)))
	return ret;

    /* if new size is same as old, we're done */

    if (pMBWindow->width == pWin->drawable.width &&
        pMBWindow->height == pWin->drawable.height)
	return ret;

    width = pWin->drawable.width;
    height = pWin->drawable.height;
    dx = pWin->drawable.x - pMBWindow->x;
    dy = pWin->drawable.x - pMBWindow->y;
    dw = width - pMBWindow->width;
    dh = height - pMBWindow->height;
    GravityTranslate (0, 0, -dx, -dy, dw, dh,
		      pWin->bitGravity, &destx, &desty);

    /* if the window grew, remember to paint the window background,
     * and maybe send expose events, for the new areas of the buffers
     */

    clear = pMBWindow->width < width || pMBWindow->height < height ||
	    pWin->bitGravity == ForgetGravity;

    sourcex = 0;
    sourcey = 0;
    savewidth = pMBWindow->width;
    saveheight = pMBWindow->height;
    /* clip rectangle to source and destination */
    if (destx < 0)
    {
	savewidth += destx;
	sourcex -= destx;
	destx = 0;
    }
    if (destx + savewidth > width)
	savewidth = width - destx;
    if (desty < 0)
    {
	saveheight += desty;
	sourcey -= desty;
	desty = 0;
    }
    if (desty + saveheight > height)
	saveheight = height - desty;

    pMBWindow->width = width;
    pMBWindow->height = height;
    pMBWindow->x = pWin->drawable.x;
    pMBWindow->y = pWin->drawable.y;

    if (clear)
    {
	BoxRec box;

	box.x1 = box.y1 = 0;
	box.x2 = width;
	box.y2 = height;
	REGION_INIT(pScreen, &exposedRegion, &box, 1);
	if (pWin->bitGravity != ForgetGravity)
	{
	    RegionRec preservedRegion;
	    box.x1 = destx;
	    box.y1 = desty;
	    box.x2 = destx + savewidth;
	    box.y2 = desty + saveheight;
	    REGION_INIT(pScreen, &preservedRegion, &box, 1);
	    REGION_SUBTRACT(pScreen, &exposedRegion, &exposedRegion, &preservedRegion);
	    REGION_UNINIT(pScreen, &preservedRegion);
	}

    } /* end if (clear) */

    pGC = GetScratchGC (pWin->drawable.depth, pScreen);

    /* create buffers with new window size */

    for (i = 0; i < pMBWindow->numMultibuffer; i++)
    {
	pMBBuffer = &pMBWindow->buffers[i];
	pPixmap = (*pScreen->CreatePixmap) (pScreen, width, height, pWin->drawable.depth);
	if (!pPixmap)
	{
	    (* MB_SCREEN_PRIV(pScreen)->DestroyImageBuffers)(pWin);
	    break;
	}
	if (clear)
	{
	    MultibufferPaintBackgroundRegion(pWin, (DrawablePtr)pPixmap, &exposedRegion);
	    MultibufferExpose(pMBBuffer, &exposedRegion);
	}
	if (pWin->bitGravity != ForgetGravity)
	{
	    ValidateGC ((DrawablePtr)pPixmap, pGC);
	    (*pGC->ops->CopyArea) (pMBBuffer->pDrawable, (DrawablePtr)pPixmap,
				   pGC,
				   sourcex, sourcey, savewidth, saveheight,
				   destx, desty);
	}
	pPixmap->drawable.id = pMBBuffer->pDrawable->id;
	(*pScreen->DestroyPixmap) ((PixmapPtr) pMBBuffer->pDrawable);
	pMBBuffer->pDrawable = (DrawablePtr) pPixmap;
	if (i != pMBWindow->displayedMultibuffer)
	{
	    ChangeResourceValue (pPixmap->drawable.id,
				 MultibufferDrawableResType,
				 (pointer) pPixmap);
	}
    }
    FreeScratchGC (pGC);
    if (clear)
	REGION_UNINIT(pScreen, &exposedRegion);
    return TRUE;
}

static void
pixWrapScreenFuncs(pScreen)
    ScreenPtr pScreen;
{
    mbufPixmapPrivPtr pMBPriv = MB_SCREEN_PRIV_PIXMAP(pScreen);
    WRAP_SCREEN_FUNC(pScreen, pMBPriv, PositionWindow, pixPositionWindow);
}

static void
pixResetProc(pScreen)
    ScreenPtr pScreen;
{
    mbufScreenPtr pMBScreen = MB_SCREEN_PRIV(pScreen);
    mbufPixmapPrivPtr pMBPriv = MB_SCREEN_PRIV_PIXMAP(pScreen);

    xfree(pMBScreen->pInfo);
    xfree(pMBPriv);
}

static void
pixClearImageBufferArea(pMBBuffer, x,y, width,height, exposures)
    mbufBufferPtr	pMBBuffer;
    short		x, y;
    unsigned short	width, height;
    Bool		exposures;
{
    WindowPtr pWin;
    ScreenPtr pScreen;
    BoxRec box;
    RegionRec region;
    int w_width, w_height;
    DrawablePtr pDrawable;

    pWin = pMBBuffer->pMBWindow->pWindow;
    pScreen = pWin->drawable.pScreen;

    w_width  = pWin->drawable.width;
    w_height = pWin->drawable.height;

    box.x1 = x;
    box.y1 = y;
    box.x2 = width  ? (box.x1 + width)  : w_width;
    box.y2 = height ? (box.y1 + height) : w_height;

    if (box.x1 < 0)        box.x1 = 0;
    if (box.y1 < 0)        box.y1 = 0;
    if (box.x2 > w_width)  box.x2 = w_width;
    if (box.y2 > w_height) box.y2 = w_height;

    REGION_INIT(pScreen, &region, &box, 1);

    if (pMBBuffer->number == pMBBuffer->pMBWindow->displayedMultibuffer)
      pDrawable = (DrawablePtr) pWin;
    else
      pDrawable = pMBBuffer->pDrawable;

    MultibufferPaintBackgroundRegion(pWin, pDrawable, &region);

    if (exposures)
	MultibufferExpose(pMBBuffer, &region);

    REGION_UNINIT(pScreen, &region);
}

static void
pixDeleteBufferDrawable(pDrawable)
    DrawablePtr	pDrawable;
{
    (* pDrawable->pScreen->DestroyPixmap)((PixmapPtr) pDrawable);
}