vcl/win/gdi/salvd.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <svsys.h>
  21
  22 #include <comphelper/windowserrorstring.hxx>
  23
  24 #include <vcl/sysdata.hxx>
  25
  26 #include <win/wincomp.hxx>
  27 #include <win/saldata.hxx>
  28 #include <win/salinst.h>
  29 #include <win/salgdi.h>
  30 #include <win/salvd.h>
  31 #include <opengl/win/gdiimpl.hxx>
  32 #include <sal/log.hxx>
  33 #include <o3tl/temporary.hxx>
  34
  35 HBITMAP WinSalVirtualDevice::ImplCreateVirDevBitmap(HDC hDC, long nDX, long nDY, sal_uInt16 nBitCount, void **ppData)
  36 {
  37     HBITMAP hBitmap;
  38
  39     if ( nBitCount == 1 )
  40     {
  41         hBitmap = CreateBitmap( static_cast<int>(nDX), static_cast<int>(nDY), 1, 1, nullptr );
  42         SAL_WARN_IF( !hBitmap, "vcl", "CreateBitmap failed: " << WindowsErrorString( GetLastError() ) );
  43         ppData = nullptr;
  44     }
  45     else
  46     {
  47         if (nBitCount == 0)
  48             nBitCount = static_cast<WORD>(GetDeviceCaps(hDC, BITSPIXEL));
  49
  50         // #146839# Don't use CreateCompatibleBitmap() - there seem to
  51         // be built-in limits for those HBITMAPs, at least this fails
  52         // rather often on large displays/multi-monitor setups.
  53         BITMAPINFO aBitmapInfo;
  54         aBitmapInfo.bmiHeader.biSize = sizeof( BITMAPINFOHEADER );
  55         aBitmapInfo.bmiHeader.biWidth = nDX;
  56         aBitmapInfo.bmiHeader.biHeight = nDY;
  57         aBitmapInfo.bmiHeader.biPlanes = 1;
  58         aBitmapInfo.bmiHeader.biBitCount = nBitCount;
  59         aBitmapInfo.bmiHeader.biCompression = BI_RGB;
  60         aBitmapInfo.bmiHeader.biSizeImage = 0;
  61         aBitmapInfo.bmiHeader.biXPelsPerMeter = 0;
  62         aBitmapInfo.bmiHeader.biYPelsPerMeter = 0;
  63         aBitmapInfo.bmiHeader.biClrUsed = 0;
  64         aBitmapInfo.bmiHeader.biClrImportant = 0;
  65
  66         hBitmap = CreateDIBSection( hDC, &aBitmapInfo,
  67                                     DIB_RGB_COLORS, ppData, nullptr,
  68                                     0 );
  69         SAL_WARN_IF( !hBitmap, "vcl", "CreateDIBSection failed: " << WindowsErrorString( GetLastError() ) );
  70     }
  71
  72     return hBitmap;
  73 }
  74
  75 std::unique_ptr<SalVirtualDevice> WinSalInstance::CreateVirtualDevice( SalGraphics* pSGraphics,
  76                                                        long &nDX, long &nDY,
  77                                                        DeviceFormat eFormat,
  78                                                        const SystemGraphicsData* pData )
  79 {
  80     WinSalGraphics* pGraphics = static_cast<WinSalGraphics*>(pSGraphics);
  81     HDC hDC = nullptr;
  82
  83     if( pData )
  84     {
  85         hDC = (pData->hDC) ? pData->hDC : GetDC(pData->hWnd);
  86         if (hDC)
  87         {
  88             nDX = GetDeviceCaps( hDC, HORZRES );
  89             nDY = GetDeviceCaps( hDC, VERTRES );
  90         }
  91         else
  92         {
  93             nDX = 0;
  94             nDY = 0;
  95         }
  96     }
  97     else
  98     {
  99         hDC = CreateCompatibleDC( pGraphics->getHDC() );
 100         SAL_WARN_IF( !hDC, "vcl", "CreateCompatibleDC failed: " << WindowsErrorString( GetLastError() ) );
 101     }
 102
 103     if (!hDC)
 104         return nullptr;
 105
 106     sal_uInt16 nBitCount = (eFormat == DeviceFormat::BITMASK) ? 1 : 0;
 107
 108     HBITMAP hBmp = nullptr;
 109     if (!pData)
 110     {
 111         // #124826# continue even if hBmp could not be created
 112         // if we would return a failure in this case, the process
 113         // would terminate which is not required
 114         hBmp = WinSalVirtualDevice::ImplCreateVirDevBitmap(pGraphics->getHDC(),
 115                                                            nDX, nDY, nBitCount,
 116                                                            &o3tl::temporary<void*>(nullptr));
 117     }
 118
 119     const bool bForeignDC = pData != nullptr && pData->hDC != nullptr;
 120     const SalData* pSalData = GetSalData();
 121
 122     WinSalVirtualDevice* pVDev = new WinSalVirtualDevice(hDC, hBmp, nBitCount,
 123                                                          bForeignDC, nDX, nDY);
 124
 125     WinSalGraphics* pVirGraphics = new WinSalGraphics(WinSalGraphics::VIRTUAL_DEVICE,
 126                                                       pGraphics->isScreen(), nullptr, pVDev);
 127
 128     // by default no! mirroring for VirtualDevices, can be enabled with EnableRTL()
 129     pVirGraphics->SetLayout( SalLayoutFlags::NONE );
 130     pVirGraphics->setHDC(hDC);
 131
 132     if ( pSalData->mhDitherPal && pVirGraphics->isScreen() )
 133     {
 134         pVirGraphics->setDefPal(SelectPalette( hDC, pSalData->mhDitherPal, TRUE ));
 135         RealizePalette( hDC );
 136     }
 137
 138     pVirGraphics->InitGraphics();
 139     pVDev->setGraphics(pVirGraphics);
 140
 141     return std::unique_ptr<SalVirtualDevice>(pVDev);
 142 }
 143
 144 WinSalVirtualDevice::WinSalVirtualDevice(HDC hDC, HBITMAP hBMP, sal_uInt16 nBitCount, bool bForeignDC, long nWidth, long nHeight)
 145     : mhLocalDC(hDC),          // HDC or 0 for Cache Device
 146       mhBmp(hBMP),             // Memory Bitmap
 147       mnBitCount(nBitCount),   // BitCount (0 or 1)
 148       mbGraphics(false),       // is Graphics used
 149       mbForeignDC(bForeignDC), // uses a foreign DC instead of a bitmap
 150       mnWidth(nWidth),
 151       mnHeight(nHeight)
 152 {
 153     // Default Bitmap
 154     if (hBMP)
 155         mhDefBmp = SelectBitmap(hDC, hBMP);
 156     else
 157         mhDefBmp = nullptr;
 158
 159     // insert VirDev into list of virtual devices
 160     SalData* pSalData = GetSalData();
 161     mpNext = pSalData->mpFirstVD;
 162     pSalData->mpFirstVD = this;
 163 }
 164
 165 WinSalVirtualDevice::~WinSalVirtualDevice()
 166 {
 167     // remove VirDev from list of virtual devices
 168     SalData* pSalData = GetSalData();
 169     WinSalVirtualDevice** ppVirDev = &pSalData->mpFirstVD;
 170     for(; (*ppVirDev != this) && *ppVirDev; ppVirDev = &(*ppVirDev)->mpNext );
 171     if( *ppVirDev )
 172         *ppVirDev = mpNext;
 173
 174     // destroy saved DC
 175     if( mpGraphics->getDefPal() )
 176         SelectPalette( mpGraphics->getHDC(), mpGraphics->getDefPal(), TRUE );
 177     mpGraphics->DeInitGraphics();
 178     if( mhDefBmp )
 179         SelectBitmap( mpGraphics->getHDC(), mhDefBmp );
 180     if( !mbForeignDC )
 181         DeleteDC( mpGraphics->getHDC() );
 182 }
 183
 184 SalGraphics* WinSalVirtualDevice::AcquireGraphics()
 185 {
 186     if ( mbGraphics )
 187         return nullptr;
 188
 189     if ( mpGraphics )
 190         mbGraphics = true;
 191
 192     return mpGraphics.get();
 193 }
 194
 195 void WinSalVirtualDevice::ReleaseGraphics( SalGraphics* )
 196 {
 197     mbGraphics = false;
 198 }
 199
 200 bool WinSalVirtualDevice::SetSize( long nDX, long nDY )
 201 {
 202     if( mbForeignDC || !mhBmp )
 203         return true;    // ???
 204
 205     HBITMAP hNewBmp = ImplCreateVirDevBitmap(getHDC(), nDX, nDY, mnBitCount,
 206                                              &o3tl::temporary<void*>(nullptr));
 207     if (!hNewBmp)
 208     {
 209         mnWidth = 0;
 210         mnHeight = 0;
 211         return false;
 212     }
 213
 214     mnWidth = nDX;
 215     mnHeight = nDY;
 216
 217     SelectBitmap(getHDC(), hNewBmp);
 218     mhBmp.reset(hNewBmp);
 219
 220     if (mpGraphics)
 221     {
 222         WinOpenGLSalGraphicsImpl *pImpl;
 223         pImpl = dynamic_cast< WinOpenGLSalGraphicsImpl * >(mpGraphics->GetImpl());
 224         if (pImpl)
 225             pImpl->Init();
 226     }
 227
 228     return true;
 229 }
 230
 231 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */