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/* $Id: VBoxGuestR3LibSeamless.cpp $ */
/** @file
* VBoxGuestR3Lib - Ring-3 Support Library for VirtualBox guest additions, Seamless mode.
*/
/*
* Copyright (C) 2007-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include <iprt/assert.h>
#include <iprt/errcore.h>
#include <iprt/string.h>
#include <VBox/log.h>
#include "VBoxGuestR3LibInternal.h"
#ifdef VBOX_VBGLR3_XFREE86
/* Rather than try to resolve all the header file conflicts, I will just
prototype what we need here. */
extern "C" void* xf86memcpy(void*,const void*,xf86size_t);
# undef memcpy
# define memcpy xf86memcpy
#endif /* VBOX_VBGLR3_XFREE86 */
/**
* Tell the host that we support (or no longer support) seamless mode.
*
* @returns IPRT status value
* @param fState whether or not we support seamless mode
*/
VBGLR3DECL(int) VbglR3SeamlessSetCap(bool fState)
{
if (fState)
return VbglR3SetGuestCaps(VMMDEV_GUEST_SUPPORTS_SEAMLESS, 0);
return VbglR3SetGuestCaps(0, VMMDEV_GUEST_SUPPORTS_SEAMLESS);
}
/**
* Wait for a seamless mode change event.
*
* @returns IPRT status value.
* @param[out] pMode On success, the seamless mode to switch into (i.e.
* disabled, visible region or host window).
*/
VBGLR3DECL(int) VbglR3SeamlessWaitEvent(VMMDevSeamlessMode *pMode)
{
AssertPtrReturn(pMode, VERR_INVALID_POINTER);
/** @todo r=andy The (similar / duplicate) Windows code does similar waiting. Merge / fix this. */
uint32_t fEvent = 0;
int rc = VbglR3WaitEvent(VMMDEV_EVENT_SEAMLESS_MODE_CHANGE_REQUEST, 1000 /* ms */, &fEvent);
if (RT_SUCCESS(rc))
{
/* did we get the right event? */
if (fEvent & VMMDEV_EVENT_SEAMLESS_MODE_CHANGE_REQUEST)
{
VMMDevSeamlessChangeRequest seamlessChangeRequest;
/* get the seamless change request */
vmmdevInitRequest(&seamlessChangeRequest.header, VMMDevReq_GetSeamlessChangeRequest);
seamlessChangeRequest.mode = (VMMDevSeamlessMode)-1;
seamlessChangeRequest.eventAck = VMMDEV_EVENT_SEAMLESS_MODE_CHANGE_REQUEST;
rc = vbglR3GRPerform(&seamlessChangeRequest.header);
if (RT_SUCCESS(rc))
{
*pMode = seamlessChangeRequest.mode;
return VINF_SUCCESS;
}
}
else
rc = VERR_TRY_AGAIN;
}
else if ( rc == VERR_INTERRUPTED
|| rc == VERR_TIMEOUT /* just in case */)
rc = VERR_TRY_AGAIN;
return rc;
}
/**
* Request the last seamless mode switch from the host again.
*
* @returns IPRT status value.
* @param[out] pMode On success, the seamless mode that was switched
* into (i.e. disabled, visible region or host window).
*/
VBGLR3DECL(int) VbglR3SeamlessGetLastEvent(VMMDevSeamlessMode *pMode)
{
VMMDevSeamlessChangeRequest seamlessChangeRequest;
int rc;
AssertPtrReturn(pMode, VERR_INVALID_PARAMETER);
/* get the seamless change request */
vmmdevInitRequest(&seamlessChangeRequest.header, VMMDevReq_GetSeamlessChangeRequest);
seamlessChangeRequest.mode = (VMMDevSeamlessMode)-1;
seamlessChangeRequest.eventAck = VMMDEV_EVENT_SEAMLESS_MODE_CHANGE_REQUEST;
rc = vbglR3GRPerform(&seamlessChangeRequest.header);
if (RT_SUCCESS(rc))
{
*pMode = seamlessChangeRequest.mode;
return VINF_SUCCESS;
}
return rc;
}
/**
* Inform the host about the visible region
*
* @returns IPRT status code
* @param cRects number of rectangles in the list of visible rectangles
* @param pRects list of visible rectangles on the guest display
*
* @todo A scatter-gather version of vbglR3GRPerform would be nice, so that we don't have
* to copy our rectangle and header data into a single structure and perform an
* additional allocation.
* @todo Would that really gain us much, given that the rectangles may not
* be grouped at all, or in the format we need? Keeping the memory
* for our "single structure" around (re-alloc-ing it if necessary)
* sounds like a simpler optimisation if we need it.
*/
VBGLR3DECL(int) VbglR3SeamlessSendRects(uint32_t cRects, PRTRECT pRects)
{
VMMDevVideoSetVisibleRegion *pReq;
int rc;
AssertReturn(pRects || cRects == 0, VERR_INVALID_PARAMETER);
AssertMsgReturn(cRects <= _1M, ("%u\n", cRects), VERR_OUT_OF_RANGE);
rc = vbglR3GRAlloc((VMMDevRequestHeader **)&pReq,
sizeof(VMMDevVideoSetVisibleRegion)
+ cRects * sizeof(RTRECT)
- sizeof(RTRECT),
VMMDevReq_VideoSetVisibleRegion);
if (RT_SUCCESS(rc))
{
pReq->cRect = cRects;
if (cRects)
memcpy(&pReq->Rect, pRects, cRects * sizeof(RTRECT));
/* This will fail harmlessly for cRect == 0 and older host code */
rc = vbglR3GRPerform(&pReq->header);
LogFunc(("Visible region request returned %Rrc, internal %Rrc.\n",
rc, pReq->header.rc));
if (RT_SUCCESS(rc))
rc = pReq->header.rc;
vbglR3GRFree(&pReq->header);
}
LogFunc(("Sending %u rectangles to the host: %Rrc\n", cRects, rc));
return rc;
}
VBGLR3DECL(int) VbglR3SeamlessSendMonitorPositions(uint32_t cPositions, PRTPOINT pPositions)
{
if (!pPositions || cPositions <= 0)
return VERR_INVALID_PARAMETER;
VMMDevVideoUpdateMonitorPositions *pReq;
int rc;
rc = vbglR3GRAlloc((VMMDevRequestHeader **)&pReq,
sizeof(VMMDevVideoUpdateMonitorPositions)
+ (cPositions - 1) * sizeof(RTPOINT),
VMMDevReq_VideoUpdateMonitorPositions);
if (RT_SUCCESS(rc))
{
pReq->cPositions = cPositions;
if (cPositions)
memcpy(&pReq->aPositions, pPositions, cPositions * sizeof(RTPOINT));
rc = vbglR3GRPerform(&pReq->header);
LogFunc(("Monitor position update request returned %Rrc, internal %Rrc.\n",
rc, pReq->header.rc));
if (RT_SUCCESS(rc))
rc = pReq->header.rc;
vbglR3GRFree(&pReq->header);
}
LogFunc(("Sending monitor positions (%u of them) to the host: %Rrc\n", cPositions, rc));
return rc;
}
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