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/* $Id: DisplayUtils.cpp $ */
/** @file
* Implementation of IDisplay helpers, currently only used in VBoxSVC.
*/
/*
* Copyright (C) 2010-2022 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>.
*
* SPDX-License-Identifier: GPL-3.0-only
*/
#include <DisplayUtils.h>
#include <iprt/log.h>
#include <VBox/err.h>
#include <VBox/vmm/ssm.h>
#include <VBoxVideo.h>
int readSavedDisplayScreenshot(SsmStream &ssmStream, const Utf8Str &strStateFilePath,
uint32_t u32Type, uint8_t **ppu8Data, uint32_t *pcbData,
uint32_t *pu32Width, uint32_t *pu32Height)
{
LogFlowFunc(("u32Type = %d [%s]\n", u32Type, strStateFilePath.c_str()));
/** @todo cache read data */
if (strStateFilePath.isEmpty())
{
/* No saved state data. */
return VERR_NOT_SUPPORTED;
}
uint8_t *pu8Data = NULL;
uint32_t cbData = 0;
uint32_t u32Width = 0;
uint32_t u32Height = 0;
PSSMHANDLE pSSM;
int vrc = ssmStream.open(strStateFilePath.c_str(), false /*fWrite*/, &pSSM);
if (RT_SUCCESS(vrc))
{
uint32_t uVersion;
vrc = SSMR3Seek(pSSM, "DisplayScreenshot", 1100 /*iInstance*/, &uVersion);
if (RT_SUCCESS(vrc))
{
if (uVersion == sSSMDisplayScreenshotVer)
{
uint32_t cBlocks;
vrc = SSMR3GetU32(pSSM, &cBlocks);
AssertRCReturn(vrc, vrc);
for (uint32_t i = 0; i < cBlocks; i++)
{
uint32_t cbBlock;
vrc = SSMR3GetU32(pSSM, &cbBlock);
AssertRCBreak(vrc);
uint32_t typeOfBlock;
vrc = SSMR3GetU32(pSSM, &typeOfBlock);
AssertRCBreak(vrc);
LogFlowFunc(("[%d] type %d, size %d bytes\n", i, typeOfBlock, cbBlock));
if (typeOfBlock == u32Type)
{
if (cbBlock > 2 * sizeof(uint32_t))
{
cbData = (uint32_t)(cbBlock - 2 * sizeof(uint32_t));
pu8Data = (uint8_t *)RTMemAlloc(cbData);
if (pu8Data == NULL)
{
vrc = VERR_NO_MEMORY;
break;
}
vrc = SSMR3GetU32(pSSM, &u32Width);
AssertRCBreak(vrc);
vrc = SSMR3GetU32(pSSM, &u32Height);
AssertRCBreak(vrc);
vrc = SSMR3GetMem(pSSM, pu8Data, cbData);
AssertRCBreak(vrc);
}
else
{
/* No saved state data. */
vrc = VERR_NOT_SUPPORTED;
}
break;
}
else
{
/* displaySSMSaveScreenshot did not write any data, if
* cbBlock was == 2 * sizeof (uint32_t).
*/
if (cbBlock > 2 * sizeof (uint32_t))
{
vrc = SSMR3Skip(pSSM, cbBlock);
AssertRCBreak(vrc);
}
}
}
}
else
{
vrc = VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
}
}
ssmStream.close();
}
if (RT_SUCCESS(vrc))
{
if (u32Type == 0 && cbData % 4 != 0)
{
/* Bitmap is 32bpp, so data is invalid. */
vrc = VERR_SSM_UNEXPECTED_DATA;
}
}
if (RT_SUCCESS(vrc))
{
*ppu8Data = pu8Data;
*pcbData = cbData;
*pu32Width = u32Width;
*pu32Height = u32Height;
LogFlowFunc(("cbData %d, u32Width %d, u32Height %d\n", cbData, u32Width, u32Height));
}
LogFlowFunc(("vrc %Rrc\n", vrc));
return vrc;
}
void freeSavedDisplayScreenshot(uint8_t *pu8Data)
{
/** @todo not necessary when caching is implemented. */
RTMemFree(pu8Data);
}
int readSavedGuestScreenInfo(SsmStream &ssmStream, const Utf8Str &strStateFilePath,
uint32_t u32ScreenId, uint32_t *pu32OriginX, uint32_t *pu32OriginY,
uint32_t *pu32Width, uint32_t *pu32Height, uint16_t *pu16Flags)
{
LogFlowFunc(("u32ScreenId = %d [%s]\n", u32ScreenId, strStateFilePath.c_str()));
/** @todo cache read data */
if (strStateFilePath.isEmpty())
{
/* No saved state data. */
return VERR_NOT_SUPPORTED;
}
PSSMHANDLE pSSM;
int vrc = ssmStream.open(strStateFilePath.c_str(), false /*fWrite*/, &pSSM);
if (RT_SUCCESS(vrc))
{
uint32_t uVersion;
vrc = SSMR3Seek(pSSM, "DisplayData", 0 /*iInstance*/, &uVersion);
if (RT_SUCCESS(vrc))
{
/* Starting from sSSMDisplayVer2 we have pu32Width and pu32Height.
* Starting from sSSMDisplayVer3 we have all the rest of parameters we need. */
if (uVersion >= sSSMDisplayVer2)
{
uint32_t cMonitors;
SSMR3GetU32(pSSM, &cMonitors);
if (u32ScreenId > cMonitors)
{
vrc = VERR_INVALID_PARAMETER;
}
else
{
if (uVersion == sSSMDisplayVer2)
{
/* Skip all previous monitors, each 5 uint32_t, and the first 3 uint32_t entries. */
SSMR3Skip(pSSM, u32ScreenId * 5 * sizeof(uint32_t) + 3 * sizeof(uint32_t));
SSMR3GetU32(pSSM, pu32Width);
SSMR3GetU32(pSSM, pu32Height);
*pu32OriginX = 0;
*pu32OriginY = 0;
*pu16Flags = VBVA_SCREEN_F_ACTIVE;
}
else
{
/* Skip all previous monitors, each 8 uint32_t, and the first 3 uint32_t entries. */
SSMR3Skip(pSSM, u32ScreenId * 8 * sizeof(uint32_t) + 3 * sizeof(uint32_t));
SSMR3GetU32(pSSM, pu32Width);
SSMR3GetU32(pSSM, pu32Height);
SSMR3GetU32(pSSM, pu32OriginX);
SSMR3GetU32(pSSM, pu32OriginY);
uint32_t u32Flags = 0;
SSMR3GetU32(pSSM, &u32Flags);
*pu16Flags = (uint16_t)u32Flags;
}
}
}
else
{
vrc = VERR_NOT_SUPPORTED;
}
}
ssmStream.close();
}
LogFlowFunc(("vrc %Rrc\n", vrc));
return vrc;
}
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