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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <svsys.h>
#include <comphelper/windowserrorstring.hxx>
#include <vcl/sysdata.hxx>
#include <win/wincomp.hxx>
#include <win/saldata.hxx>
#include <win/salinst.h>
#include <win/salgdi.h>
#include <win/salvd.h>
#include <sal/log.hxx>
#include <o3tl/temporary.hxx>
HBITMAP WinSalVirtualDevice::ImplCreateVirDevBitmap(HDC hDC, tools::Long nDX, tools::Long nDY, sal_uInt16 nBitCount, void **ppData)
{
HBITMAP hBitmap;
if ( nBitCount == 1 )
{
hBitmap = CreateBitmap( static_cast<int>(nDX), static_cast<int>(nDY), 1, 1, nullptr );
SAL_WARN_IF( !hBitmap, "vcl", "CreateBitmap failed: " << WindowsErrorString( GetLastError() ) );
ppData = nullptr;
}
else
{
if (nBitCount == 0)
nBitCount = static_cast<WORD>(GetDeviceCaps(hDC, BITSPIXEL));
// #146839# Don't use CreateCompatibleBitmap() - there seem to
// be built-in limits for those HBITMAPs, at least this fails
// rather often on large displays/multi-monitor setups.
BITMAPINFO aBitmapInfo;
aBitmapInfo.bmiHeader.biSize = sizeof( BITMAPINFOHEADER );
aBitmapInfo.bmiHeader.biWidth = nDX;
aBitmapInfo.bmiHeader.biHeight = nDY;
aBitmapInfo.bmiHeader.biPlanes = 1;
aBitmapInfo.bmiHeader.biBitCount = nBitCount;
aBitmapInfo.bmiHeader.biCompression = BI_RGB;
aBitmapInfo.bmiHeader.biSizeImage = 0;
aBitmapInfo.bmiHeader.biXPelsPerMeter = 0;
aBitmapInfo.bmiHeader.biYPelsPerMeter = 0;
aBitmapInfo.bmiHeader.biClrUsed = 0;
aBitmapInfo.bmiHeader.biClrImportant = 0;
hBitmap = CreateDIBSection( hDC, &aBitmapInfo,
DIB_RGB_COLORS, ppData, nullptr,
0 );
SAL_WARN_IF( !hBitmap, "vcl", "CreateDIBSection failed: " << WindowsErrorString( GetLastError() ) );
}
return hBitmap;
}
std::unique_ptr<SalVirtualDevice> WinSalInstance::CreateVirtualDevice( SalGraphics& rSGraphics,
tools::Long &nDX, tools::Long &nDY,
DeviceFormat /*eFormat*/,
const SystemGraphicsData* pData )
{
WinSalGraphics& rGraphics = static_cast<WinSalGraphics&>(rSGraphics);
HDC hDC = nullptr;
if( pData )
{
hDC = (pData->hDC) ? pData->hDC : GetDC(pData->hWnd);
if (hDC)
{
nDX = GetDeviceCaps( hDC, HORZRES );
nDY = GetDeviceCaps( hDC, VERTRES );
}
else
{
nDX = 0;
nDY = 0;
}
}
else
{
hDC = CreateCompatibleDC( rGraphics.getHDC() );
SAL_WARN_IF( !hDC, "vcl", "CreateCompatibleDC failed: " << WindowsErrorString( GetLastError() ) );
}
if (!hDC)
return nullptr;
sal_uInt16 nBitCount = 0;
HBITMAP hBmp = nullptr;
if (!pData)
{
// #124826# continue even if hBmp could not be created
// if we would return a failure in this case, the process
// would terminate which is not required
hBmp = WinSalVirtualDevice::ImplCreateVirDevBitmap(rGraphics.getHDC(),
nDX, nDY, nBitCount,
&o3tl::temporary<void*>(nullptr));
}
const bool bForeignDC = pData != nullptr && pData->hDC != nullptr;
const SalData* pSalData = GetSalData();
WinSalVirtualDevice* pVDev = new WinSalVirtualDevice(hDC, hBmp, nBitCount,
bForeignDC, nDX, nDY);
WinSalGraphics* pVirGraphics = new WinSalGraphics(WinSalGraphics::VIRTUAL_DEVICE,
rGraphics.isScreen(), nullptr, pVDev);
// by default no! mirroring for VirtualDevices, can be enabled with EnableRTL()
pVirGraphics->SetLayout( SalLayoutFlags::NONE );
pVirGraphics->setHDC(hDC);
if ( pSalData->mhDitherPal && pVirGraphics->isScreen() )
{
pVirGraphics->setPalette(pSalData->mhDitherPal);
RealizePalette( hDC );
}
pVDev->setGraphics(pVirGraphics);
return std::unique_ptr<SalVirtualDevice>(pVDev);
}
WinSalVirtualDevice::WinSalVirtualDevice(HDC hDC, HBITMAP hBMP, sal_uInt16 nBitCount, bool bForeignDC, tools::Long nWidth, tools::Long nHeight)
: mhLocalDC(hDC), // HDC or 0 for Cache Device
mhBmp(hBMP), // Memory Bitmap
mnBitCount(nBitCount), // BitCount (0 or 1)
mbGraphics(false), // is Graphics used
mbForeignDC(bForeignDC), // uses a foreign DC instead of a bitmap
mnWidth(nWidth),
mnHeight(nHeight)
{
// Default Bitmap
if (hBMP)
mhDefBmp = SelectBitmap(hDC, hBMP);
else
mhDefBmp = nullptr;
// insert VirDev into list of virtual devices
SalData* pSalData = GetSalData();
mpNext = pSalData->mpFirstVD;
pSalData->mpFirstVD = this;
}
WinSalVirtualDevice::~WinSalVirtualDevice()
{
// remove VirDev from list of virtual devices
SalData* pSalData = GetSalData();
WinSalVirtualDevice** ppVirDev = &pSalData->mpFirstVD;
for(; (*ppVirDev != this) && *ppVirDev; ppVirDev = &(*ppVirDev)->mpNext );
if( *ppVirDev )
*ppVirDev = mpNext;
HDC hDC = mpGraphics->getHDC();
// restore the mpGraphics' original HDC values, so the HDC can be deleted in the !mbForeignDC case
mpGraphics->setHDC(nullptr);
if( mhDefBmp )
SelectBitmap(hDC, mhDefBmp);
if( !mbForeignDC )
DeleteDC(hDC);
}
SalGraphics* WinSalVirtualDevice::AcquireGraphics()
{
if ( mbGraphics )
return nullptr;
if ( mpGraphics )
mbGraphics = true;
return mpGraphics.get();
}
void WinSalVirtualDevice::ReleaseGraphics( SalGraphics* )
{
mbGraphics = false;
}
bool WinSalVirtualDevice::SetSize( tools::Long nDX, tools::Long nDY )
{
if( mbForeignDC || !mhBmp )
return true; // ???
HBITMAP hNewBmp = ImplCreateVirDevBitmap(getHDC(), nDX, nDY, mnBitCount,
&o3tl::temporary<void*>(nullptr));
if (!hNewBmp)
{
mnWidth = 0;
mnHeight = 0;
return false;
}
mnWidth = nDX;
mnHeight = nDY;
SelectBitmap(getHDC(), hNewBmp);
mhBmp.reset(hNewBmp);
return true;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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