midispcur.c

远程桌面连接工具

{
    miDCScreenPtr   pScreenPriv;
    miDCCursorPtr   pPriv;
    WindowPtr	    pWin;

    pPriv = (miDCCursorPtr) pCursor->bits->devPriv[pScreen->myNum];
    if (!pPriv)
    {
	pPriv = miDCRealize(pScreen, pCursor);
	if (!pPriv)
	    return FALSE;
    }
    pScreenPriv = (miDCScreenPtr) pScreen->devPrivates[miDCScreenIndex].ptr;
    pWin = WindowTable[pScreen->myNum];
    if (!EnsureGC(pScreenPriv->pSourceGC, pWin))
	return FALSE;
    if (!EnsureGC(pScreenPriv->pMaskGC, pWin))
    {
	FreeGC (pScreenPriv->pSourceGC, (GContext) 0);
	pScreenPriv->pSourceGC = 0;
	return FALSE;
    }
    miDCPutBits ((DrawablePtr)pWin, pPriv,
		 pScreenPriv->pSourceGC, pScreenPriv->pMaskGC,
		 x, y, pCursor->bits->width, pCursor->bits->height,
		 source, mask);
    return TRUE;
}

static Bool
miDCSaveUnderCursor (pScreen, x, y, w, h)
    ScreenPtr	pScreen;
    int		x, y, w, h;
{
    miDCScreenPtr   pScreenPriv;
    PixmapPtr	    pSave;
    WindowPtr	    pWin;
    GCPtr	    pGC;

    pScreenPriv = (miDCScreenPtr) pScreen->devPrivates[miDCScreenIndex].ptr;
    pSave = pScreenPriv->pSave;
    pWin = WindowTable[pScreen->myNum];
    if (!pSave || pSave->drawable.width < w || pSave->drawable.height < h)
    {
	if (pSave)
	    (*pScreen->DestroyPixmap) (pSave);
	pScreenPriv->pSave = pSave =
		(*pScreen->CreatePixmap) (pScreen, w, h, pScreen->rootDepth);
	if (!pSave)
	    return FALSE;
    }
    if (!EnsureGC(pScreenPriv->pSaveGC, pWin))
	return FALSE;
    pGC = pScreenPriv->pSaveGC;
    if (pSave->drawable.serialNumber != pGC->serialNumber)
	ValidateGC ((DrawablePtr) pSave, pGC);
    (*pGC->ops->CopyArea) ((DrawablePtr) pWin, (DrawablePtr) pSave, pGC,
			    x, y, w, h, 0, 0);
    return TRUE;
}

static Bool
miDCRestoreUnderCursor (pScreen, x, y, w, h)
    ScreenPtr	pScreen;
    int		x, y, w, h;
{
    miDCScreenPtr   pScreenPriv;
    PixmapPtr	    pSave;
    WindowPtr	    pWin;
    GCPtr	    pGC;

    pScreenPriv = (miDCScreenPtr) pScreen->devPrivates[miDCScreenIndex].ptr;
    pSave = pScreenPriv->pSave;
    pWin = WindowTable[pScreen->myNum];
    if (!pSave)
	return FALSE;
    if (!EnsureGC(pScreenPriv->pRestoreGC, pWin))
	return FALSE;
    pGC = pScreenPriv->pRestoreGC;
    if (pWin->drawable.serialNumber != pGC->serialNumber)
	ValidateGC ((DrawablePtr) pWin, pGC);
    (*pGC->ops->CopyArea) ((DrawablePtr) pSave, (DrawablePtr) pWin, pGC,
			    0, 0, w, h, x, y);
    return TRUE;
}

static Bool
miDCChangeSave (pScreen, x, y, w, h, dx, dy)
    ScreenPtr	    pScreen;
    int		    x, y, w, h, dx, dy;
{
    miDCScreenPtr   pScreenPriv;
    PixmapPtr	    pSave;
    WindowPtr	    pWin;
    GCPtr	    pGC;
    int		    sourcex, sourcey, destx, desty, copyw, copyh;

    pScreenPriv = (miDCScreenPtr) pScreen->devPrivates[miDCScreenIndex].ptr;
    pSave = pScreenPriv->pSave;
    pWin = WindowTable[pScreen->myNum];
    /*
     * restore the bits which are about to get trashed
     */
    if (!pSave)
	return FALSE;
    if (!EnsureGC(pScreenPriv->pRestoreGC, pWin))
	return FALSE;
    pGC = pScreenPriv->pRestoreGC;
    if (pWin->drawable.serialNumber != pGC->serialNumber)
	ValidateGC ((DrawablePtr) pWin, pGC);
    /*
     * copy the old bits to the screen.
     */
    if (dy > 0)
    {
	(*pGC->ops->CopyArea) ((DrawablePtr) pSave, (DrawablePtr) pWin, pGC,
			       0, h - dy, w, dy, x + dx, y + h);
    }
    else if (dy < 0)
    {
	(*pGC->ops->CopyArea) ((DrawablePtr) pSave, (DrawablePtr) pWin, pGC,
			       0, 0, w, -dy, x + dx, y + dy);
    }
    if (dy >= 0)
    {
	desty = y + dy;
	sourcey = 0;
	copyh = h - dy;
    }
    else
    {
	desty = y;
	sourcey = - dy;
	copyh = h + dy;
    }
    if (dx > 0)
    {
	(*pGC->ops->CopyArea) ((DrawablePtr) pSave, (DrawablePtr) pWin, pGC,
			       w - dx, sourcey, dx, copyh, x + w, desty);
    }
    else if (dx < 0)
    {
	(*pGC->ops->CopyArea) ((DrawablePtr) pSave, (DrawablePtr) pWin, pGC,
			       0, sourcey, -dx, copyh, x + dx, desty);
    }
    if (!EnsureGC(pScreenPriv->pSaveGC, pWin))
	return FALSE;
    pGC = pScreenPriv->pSaveGC;
    if (pSave->drawable.serialNumber != pGC->serialNumber)
	ValidateGC ((DrawablePtr) pSave, pGC);
    /*
     * move the bits that are still valid within the pixmap
     */
    if (dx >= 0)
    {
	sourcex = 0;
	destx = dx;
	copyw = w - dx;
    }
    else
    {
	destx = 0;
	sourcex = - dx;
	copyw = w + dx;
    }
    if (dy >= 0)
    {
	sourcey = 0;
	desty = dy;
	copyh = h - dy;
    }
    else
    {
	desty = 0;
	sourcey = -dy;
	copyh = h + dy;
    }
    (*pGC->ops->CopyArea) ((DrawablePtr) pSave, (DrawablePtr) pSave, pGC,
			   sourcex, sourcey, copyw, copyh, destx, desty);
    /*
     * copy the new bits from the screen into the remaining areas of the
     * pixmap
     */
    if (dy > 0)
    {
	(*pGC->ops->CopyArea) ((DrawablePtr) pWin, (DrawablePtr) pSave, pGC,
			       x, y, w, dy, 0, 0);
    }
    else if (dy < 0)
    {
	(*pGC->ops->CopyArea) ((DrawablePtr) pWin, (DrawablePtr) pSave, pGC,
			       x, y + h + dy, w, -dy, 0, h + dy);
    }
    if (dy >= 0)
    {
	desty = dy;
	sourcey = y + dy;
	copyh = h - dy;
    }
    else
    {
	desty = 0;
	sourcey = y;
	copyh = h + dy;
    }
    if (dx > 0)
    {
	(*pGC->ops->CopyArea) ((DrawablePtr) pWin, (DrawablePtr) pSave, pGC,
			       x, sourcey, dx, copyh, 0, desty);
    }
    else if (dx < 0)
    {
	(*pGC->ops->CopyArea) ((DrawablePtr) pWin, (DrawablePtr) pSave, pGC,
			       x + w + dx, sourcey, -dx, copyh, w + dx, desty);
    }
    return TRUE;
}

static Bool
miDCMoveCursor (pScreen, pCursor, x, y, w, h, dx, dy, source, mask)
    ScreenPtr	    pScreen;
    CursorPtr	    pCursor;
    int		    x, y, w, h, dx, dy;
    unsigned long   source, mask;
{
    miDCCursorPtr   pPriv;
    miDCScreenPtr   pScreenPriv;
    int		    status;
    WindowPtr	    pWin;
    GCPtr	    pGC;
    XID		    gcval = FALSE;
    PixmapPtr	    pTemp;

    pPriv = (miDCCursorPtr) pCursor->bits->devPriv[pScreen->myNum];
    if (!pPriv)
    {
	pPriv = miDCRealize(pScreen, pCursor);
	if (!pPriv)
	    return FALSE;
    }
    pScreenPriv = (miDCScreenPtr) pScreen->devPrivates[miDCScreenIndex].ptr;
    pWin = WindowTable[pScreen->myNum];
    pTemp = pScreenPriv->pTemp;
    if (!pTemp ||
	pTemp->drawable.width != pScreenPriv->pSave->drawable.width ||
	pTemp->drawable.height != pScreenPriv->pSave->drawable.height)
    {
	if (pTemp)
	    (*pScreen->DestroyPixmap) (pTemp);
	pScreenPriv->pTemp = pTemp = (*pScreen->CreatePixmap)
	    (pScreen, w, h, pScreenPriv->pSave->drawable.depth);
	if (!pTemp)
	    return FALSE;
    }
    if (!pScreenPriv->pMoveGC)
    {
	pScreenPriv->pMoveGC = CreateGC ((DrawablePtr)pTemp,
	    GCGraphicsExposures, &gcval, &status);
	if (!pScreenPriv->pMoveGC)
	    return FALSE;
    }
    /*
     * copy the saved area to a temporary pixmap
     */
    pGC = pScreenPriv->pMoveGC;
    if (pGC->serialNumber != pTemp->drawable.serialNumber)
	ValidateGC ((DrawablePtr) pTemp, pGC);
    (*pGC->ops->CopyArea)((DrawablePtr)pScreenPriv->pSave,
			  (DrawablePtr)pTemp, pGC, 0, 0, w, h, 0, 0);
    
    /*
     * draw the cursor in the temporary pixmap
     */
    if (!pScreenPriv->pPixSourceGC)
    {
	pScreenPriv->pPixSourceGC = CreateGC ((DrawablePtr)pTemp,
	    GCGraphicsExposures, &gcval, &status);
	if (!pScreenPriv->pPixSourceGC)
	    return FALSE;
    }
    if (!pScreenPriv->pPixMaskGC)
    {
	pScreenPriv->pPixMaskGC = CreateGC ((DrawablePtr)pTemp,
	    GCGraphicsExposures, &gcval, &status);
	if (!pScreenPriv->pPixMaskGC)
	    return FALSE;
    }
    miDCPutBits ((DrawablePtr)pTemp, pPriv,
		 pScreenPriv->pPixSourceGC, pScreenPriv->pPixMaskGC,
 		 dx, dy, pCursor->bits->width, pCursor->bits->height,
		 source, mask);

    /*
     * copy the temporary pixmap onto the screen
     */

    if (!EnsureGC(pScreenPriv->pRestoreGC, pWin))
	return FALSE;
    pGC = pScreenPriv->pRestoreGC;
    if (pWin->drawable.serialNumber != pGC->serialNumber)
	ValidateGC ((DrawablePtr) pWin, pGC);

    (*pGC->ops->CopyArea) ((DrawablePtr) pTemp, (DrawablePtr) pWin,
			    pGC,
			    0, 0, w, h, x, y);
    return TRUE;
}